kmk_cc_exec.c@ 2801

Last change on this file since 2801 was 2801, checked in by bird, 9 years ago
kmk_cc_exec.c: More code.
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File size: 239.9 KB

Line
1	#ifdef CONFIG_WITH_COMPILER
2	/* $Id: kmk_cc_exec.c 2801 2015-09-20 19:13:24Z bird $ */
3	/** @file
4	* kmk_cc - Make "Compiler".
5	*/
6
7	/*
8	* Copyright (c) 2015 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
9	*
10	* This file is part of kBuild.
11	*
12	* kBuild is free software; you can redistribute it and/or modify
13	* it under the terms of the GNU General Public License as published by
14	* the Free Software Foundation; either version 3 of the License, or
15	* (at your option) any later version.
16	*
17	* kBuild is distributed in the hope that it will be useful,
18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20	* GNU General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with kBuild. If not, see <http://www.gnu.org/licenses/>
24	*
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include "make.h"
32
33	#include "dep.h"
34	#include "variable.h"
35	#include "rule.h"
36	#include "debug.h"
37	#include "hash.h"
38	#include <ctype.h>
39	#ifdef HAVE_STDINT_H
40	# include <stdint.h>
41	#endif
42	#include <stdarg.h>
43	#include <assert.h>
44	#include "k/kDefs.h"
45	#include "k/kTypes.h"
46
47
48	/*********************************************************************************************************************************
49	* Defined Constants And Macros *
50	*********************************************************************************************************************************/
51	/** @def KMK_CC_WITH_STATS
52	* Enables the collection of extra statistics. */
53	#ifndef KMK_CC_WITH_STATS
54	# ifdef CONFIG_WITH_MAKE_STATS
55	# define KMK_CC_WITH_STATS
56	# endif
57	#endif
58
59	/** @def KMK_CC_STRICT
60	* Indicates whether assertions and other checks are enabled. */
61	#ifndef KMK_CC_STRICT
62	# ifndef NDEBUG
63	# define KMK_CC_STRICT
64	# endif
65	#endif
66
67	#ifdef KMK_CC_STRICT
68	# ifdef _MSC_VER
69	# define KMK_CC_ASSERT(a_TrueExpr) do { if (!(a_TrueExpr)) __debugbreak(); } while (0)
70	# elif defined(__GNUC__) && (defined(KBUILD_ARCH_X86) \|\| defined(KBUILD_ARCH_AMD64))
71	# define KMK_CC_ASSERT(a_TrueExpr) do { if (!(a_TrueExpr)) __asm__ __volatile__("int3;nop"); } while (0)
72	# else
73	# define KMK_CC_ASSERT(a_TrueExpr) assert(a_TrueExpr)
74	# endif
75	#else
76	# define KMK_CC_ASSERT(a_TrueExpr) do {} while (0)
77	#endif
78	#define KMK_CC_ASSERT_ALIGNED(a_uValue, a_uAlignment) \
79	KMK_CC_ASSERT( ((a_uValue) & ((a_uAlignment) - 1)) == 0 )
80
81
82	/** @def KMK_CC_OFFSETOF
83	* Offsetof for simple stuff. */
84	#if defined(__GNUC__)
85	# define KMK_CC_OFFSETOF(a_Struct, a_Member) __builtin_offsetof(a_Struct, a_Member)
86	#else
87	# define KMK_CC_OFFSETOF(a_Struct, a_Member) ( (uintptr_t)&( ((a_Struct )(void )0)->a_Member) )
88	#endif
89
90	/** def KMK_CC_SIZEOF_MEMBER */
91	#define KMK_CC_SIZEOF_MEMBER(a_Struct, a_Member) ( sizeof( ((a_Struct )(void )0x1000)->a_Member) )
92
93	/** @def KMK_CC_SIZEOF_VAR_STRUCT
94	* Size of a struct with a variable sized array as the final member. */
95	#define KMK_CC_SIZEOF_VAR_STRUCT(a_Struct, a_FinalArrayMember, a_cArray) \
96	( KMK_CC_OFFSETOF(a_Struct, a_FinalArrayMember) + KMK_CC_SIZEOF_MEMBER(a_Struct, a_FinalArrayMember) * (a_cArray) )
97
98
99
100	/** @def KMK_CC_STATIC_ASSERT_EX
101	* Compile time assertion with text.
102	*/
103	#ifdef _MSC_VER_
104	# if _MSC_VER >= 1600
105	# define KMK_CC_STATIC_ASSERT_EX(a_Expr, a_szExpl) static_assert(a_Expr, a_szExpl)
106	# else
107	# define KMK_CC_STATIC_ASSERT_EX(a_Expr, a_szExpl) typedef int RTASSERTVAR[(a_Expr) ? 1 : 0]
108	# endif
109	#elif defined(__GNUC__) && defined(__GXX_EXPERIMENTAL_CXX0X__)
110	# define KMK_CC_STATIC_ASSERT_EX(a_Expr, a_szExpl) static_assert(a_Expr, a_szExpl)
111	#elif !defined(__GNUC__) && !defined(__IBMC__) && !defined(__IBMCPP__)
112	# define KMK_CC_STATIC_ASSERT_EX(a_Expr, a_szExpl) typedef int KMK_CC_STATIC_ASSERT_EX_TYPE[(a_Expr) ? 1 : 0]
113	#else
114	# define KMK_CC_STATIC_ASSERT_EX(a_Expr, a_szExpl) extern int KMK_CC_STATIC_ASSERT_EX_VAR[(a_Expr) ? 1 : 0]
115	extern int KMK_CC_STATIC_ASSERT_EX_VAR[1];
116	#endif
117	/** @def KMK_CC_STATIC_ASSERT
118	* Compile time assertion, simple variant.
119	*/
120	#define KMK_CC_STATIC_ASSERT(a_Expr) KMK_CC_STATIC_ASSERT_EX(a_Expr, #a_Expr)
121
122
123	/** Aligns a size for the block allocator. */
124	#define KMK_CC_BLOCK_ALIGN_SIZE(a_cb) ( ((a_cb) + (sizeof(void ) - 1U)) & ~(uint32_t)(sizeof(void ) - 1U) )
125
126	/** How to declare a no-return function.
127	* Place between scope (if any) and return type. */
128	#ifdef _MSC_VER
129	# define KMK_CC_FN_NO_RETURN declspec(noreturn)
130	#elif defined(__GNUC__)
131	# define KMK_CC_FN_NO_RETURN __attribute__((__noreturn__))
132	#endif
133
134
135	/** @defgroup grp_kmk_cc_evalprog Makefile Evaluation
136	* @{
137	*/
138	#if 1
139	# define KMK_CC_EVAL_DPRINTF_UNPACK(...) __VA_ARGS__
140	# define KMK_CC_EVAL_DPRINTF(a) fprintf(stderr, KMK_CC_EVAL_DPRINTF_UNPACK a)
141	#else
142	# define KMK_CC_EVAL_DPRINTF(a) do { } while (0)
143	#endif
144
145	/** @name KMK_CC_EVAL_QUALIFIER_XXX - Variable qualifiers.
146	* @{ */
147	#define KMK_CC_EVAL_QUALIFIER_LOCAL 1
148	#define KMK_CC_EVAL_QUALIFIER_EXPORT 2
149	#define KMK_CC_EVAL_QUALIFIER_OVERRIDE 4
150	#define KMK_CC_EVAL_QUALIFIER_PRIVATE 8
151	/** @} */
152
153	/** Eval: Max nesting depth of makefile conditionals.
154	* Affects stack usage in kmk_cc_eval_compile_worker. */
155	#define KMK_CC_EVAL_MAX_IF_DEPTH 32
156	/** Eval: Maximum number of escaped end of line sequences to track.
157	* Affects stack usage in kmk_cc_eval_compile_worker, but not the actual
158	* number of consequtive escaped newlines in the input file/variable. */
159	#define KMK_CC_EVAL_MAX_ESC_EOLS 2
160
161	/** Minimum keyword length. */
162	#define KMK_CC_EVAL_KEYWORD_MIN 2
163	/** Maximum keyword length. */
164	#define KMK_CC_EVAL_KEYWORD_MAX 16
165
166	/** @name KMK_CC_EVAL_CH_XXX - flags found in g_abEvalCcChars.
167	* @{ */
168	/** Normal character, nothing special. */
169	#define KMK_CC_EVAL_CH_NORMAL UINT16_C(0)
170	/** Blank character. */
171	#define KMK_CC_EVAL_CH_BLANK UINT16_C(1)
172	#define KMK_CC_EVAL_IS_BLANK(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_BLANK)
173	/** Space character. */
174	#define KMK_CC_EVAL_CH_SPACE UINT16_C(2)
175	#define KMK_CC_EVAL_IS_SPACE(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_SPACE)
176	/** Space character or potential EOL escape backslash. */
177	#define KMK_CC_EVAL_CH_SPACE_OR_BACKSLASH UINT16_C(4)
178	#define KMK_CC_EVAL_IS_SPACE_OR_BACKSLASH(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_SPACE_OR_BACKSLASH)
179	/** Anything we need to take notice of when parsing something could be a
180	* variable name or a recipe.
181	* All space characters, backslash (EOL escape), variable expansion dollar,
182	* variable assignment operator chars, recipe colon and recipe percent. */
183	#define KMK_CC_EVAL_CH_SPACE_VAR_OR_RECIPE UINT16_C(8)
184	#define KMK_CC_EVAL_IS_SPACE_VAR_OR_RECIPE(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_SPACE_VAR_OR_RECIPE)
185	/** Dollar character (possible variable expansion). */
186	#define KMK_CC_EVAL_CH_DOLLAR UINT16_C(16)
187	#define KMK_CC_EVAL_IS_DOLLAR(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_DOLLAR)
188	/** Dollar character (possible variable expansion). */
189	#define KMK_CC_EVAL_CH_BACKSLASH UINT16_C(32)
190	#define KMK_CC_EVAL_IS_BACKSLASH(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_BACKSLASH)
191	/** Possible EOL character. */
192	#define KMK_CC_EVAL_CH_EOL_CANDIDATE UINT16_C(64)
193	#define KMK_CC_EVAL_IS_EOL_CANDIDATE(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_EOL_CANDIDATE)
194	/** First character in a keyword. */
195	#define KMK_CC_EVAL_CH_1ST_IN_KEYWORD UINT16_C(128)
196	#define KMK_CC_EVAL_IS_1ST_IN_KEYWORD(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_1ST_IN_KEYWORD)
197	/** Second character in a keyword. */
198	#define KMK_CC_EVAL_CH_2ND_IN_KEYWORD UINT16_C(256)
199	#define KMK_CC_EVAL_IS_2ND_IN_KEYWORD(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_2ND_IN_KEYWORD)
200	/** First character in a variable qualifier keyword or 'define'. */
201	#define KMK_CC_EVAL_CH_1ST_IN_VARIABLE_KEYWORD UINT16_C(512)
202	#define KMK_CC_EVAL_IS_1ST_IN_VARIABLE_KEYWORD(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_1ST_IN_VARIABLE_KEYWORD)
203	/** Used when parsing variable names, looking for the end of a nested
204	* variable reference. Matches parentheses and backslash (escaped eol). */
205	#define KMK_CC_EVAL_CH_PAREN_OR_SLASH UINT16_C(1024)
206	#define KMK_CC_EVAL_IS_PAREN_OR_SLASH(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_PAREN_OR_SLASH)
207	/** Used when parsing ifeq/ifneq (,) sequences.
208	* Matches parentheses, comma and dollar (for non-plain string detection). */
209	#define KMK_CC_EVAL_CH_PAREN_COMMA_OR_DOLLAR UINT16_C(2048)
210	#define KMK_CC_EVAL_IS_PAREN_COMMA_OR_DOLLAR(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & KMK_CC_EVAL_CH_PAREN_COMMA_OR_DOLLAR)
211
212	/** Test of space or dollar characters. */
213	#define KMK_CC_EVAL_IS_SPACE_OR_DOLLAR(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & (KMK_CC_EVAL_CH_SPACE \| KMK_CC_EVAL_CH_DOLLAR))
214	/** Test of space, dollar or backslash (possible EOL escape) characters. */
215	#define KMK_CC_EVAL_IS_SPACE_DOLLAR_OR_SLASH(a_ch) (KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & (KMK_CC_EVAL_CH_SPACE \| KMK_CC_EVAL_CH_DOLLAR \| KMK_CC_EVAL_CH_BACKSLASH))
216	/** Test of space, dollar, backslash (possible EOL escape) or variable
217	* assingment characters. */
218	#define KMK_CC_EVAL_IS_SPACE_DOLLAR_SLASH_OR_ASSIGN(a_ch) \
219	(KMK_CC_EVAL_BM_GET(g_abEvalCcChars, a_ch) & (KMK_CC_EVAL_CH_SPACE \| KMK_CC_EVAL_CH_SPACE_VAR_OR_RECIPE \| KMK_CC_EVAL_CH_DOLLAR))
220	/** @} */
221
222	/** Sets a bitmap entry.
223	* @param a_abBitmap Typically g_abEvalCcChars.
224	* @param a_ch The character to set.
225	* @param a_uVal The value to OR in. */
226	#define KMK_CC_EVAL_BM_OR(g_abBitmap, a_ch, a_uVal) do { (g_abBitmap)[(unsigned char)(a_ch)] \|= (a_uVal); } while (0)
227
228	/** Gets a bitmap entry.
229	* @returns The value corresponding to @a a_ch.
230	* @param a_abBitmap Typically g_abEvalCcChars.
231	* @param a_ch The character to set. */
232	#define KMK_CC_EVAL_BM_GET(g_abBitmap, a_ch) ( (g_abBitmap)[(unsigned char)(a_ch)] )
233
234	/** @} */
235
236
237	/*********************************************************************************************************************************
238	* Structures and Typedefs *
239	*********************************************************************************************************************************/
240	/**
241	* Block of expand instructions.
242	*
243	* To avoid wasting space on "next" pointers, as well as a lot of time walking
244	* these chains when destroying programs, we work with blocks of instructions.
245	*/
246	typedef struct kmk_cc_block
247	{
248	/** The pointer to the next block (LIFO). */
249	struct kmk_cc_block *pNext;
250	/** The size of this block. */
251	uint32_t cbBlock;
252	/** The offset of the next free byte in the block. When set to cbBlock the
253	* block is 100% full. */
254	uint32_t offNext;
255	} KMKCCBLOCK;
256	typedef KMKCCBLOCK *PKMKCCBLOCK;
257
258
259	/** @defgroup grp_kmk_cc_exp String Expansion
260	* @{*/
261
262	/**
263	* String expansion statistics.
264	*/
265	typedef struct KMKCCEXPSTATS
266	{
267	/** Recent average size. */
268	uint32_t cchAvg;
269	} KMKCCEXPSTATS;
270	typedef KMKCCEXPSTATS *PKMKCCEXPSTATS;
271
272	/**
273	* Expansion instructions.
274	*/
275	typedef enum KMKCCEXPINSTR
276	{
277	/** Copy a plain string. */
278	kKmkCcExpInstr_CopyString = 0,
279	/** Insert an expanded variable value, which name we already know. */
280	kKmkCcExpInstr_PlainVariable,
281	/** Insert an expanded variable value, the name is dynamic (sub prog). */
282	kKmkCcExpInstr_DynamicVariable,
283	/** Insert an expanded variable value, which name we already know, doing
284	* search an replace on a string. */
285	kKmkCcExpInstr_SearchAndReplacePlainVariable,
286	/** Insert the output of function that requires no argument expansion. */
287	kKmkCcExpInstr_PlainFunction,
288	/** Insert the output of function that requires dynamic expansion of one ore
289	* more arguments. (Dynamic is perhaps not such a great name, but whatever.) */
290	kKmkCcExpInstr_DynamicFunction,
291	/** Jump to a new instruction block. */
292	kKmkCcExpInstr_Jump,
293	/** We're done, return. Has no specific structure. */
294	kKmkCcExpInstr_Return,
295	/** The end of valid instructions (exclusive). */
296	kKmkCcExpInstr_End
297	} KMKCCEXPINSTR;
298
299	/** Instruction core. */
300	typedef struct kmk_cc_exp_core
301	{
302	/** The instruction opcode number (KMKCCEXPINSTR). */
303	KMKCCEXPINSTR enmOpcode;
304	} KMKCCEXPCORE;
305	typedef KMKCCEXPCORE *PKMKCCEXPCORE;
306
307	/**
308	* String expansion subprogram.
309	*/
310	#pragma pack(1) /* save some precious bytes */
311	typedef struct kmk_cc_exp_subprog
312	{
313	/** Pointer to the first instruction. */
314	PKMKCCEXPCORE pFirstInstr;
315	/** Statistics. */
316	KMKCCEXPSTATS Stats;
317	} KMKCCEXPSUBPROG;
318	#pragma pack()
319	typedef KMKCCEXPSUBPROG *PKMKCCEXPSUBPROG;
320	KMK_CC_STATIC_ASSERT(sizeof(KMKCCEXPSUBPROG) == 12 \|\| sizeof(void *) != 8);
321
322
323	/**
324	* String expansion subprogram or plain string.
325	*/
326	#pragma pack(1) /* save some precious bytes */
327	typedef struct kmk_cc_exp_subprog_or_string
328	{
329	/** Either a plain string pointer or a subprogram. */
330	union
331	{
332	/** Subprogram for expanding this argument. */
333	KMKCCEXPSUBPROG Subprog;
334	/** Pointer to the plain string. */
335	struct
336	{
337	/** Pointer to the string. */
338	const char *psz;
339	/** String length. */
340	uint32_t cch;
341	} Plain;
342	} u;
343	/** Set if subprogram (u.Subprog), clear if plain string (u.Plain). */
344	uint8_t fSubprog;
345	/** Set if the plain string is kept in the variable_strcache.
346	* @remarks Here rather than in u.Plain to make use of alignment padding. */
347	uint8_t fPlainIsInVarStrCache;
348	/** Context/user specific. */
349	uint8_t bUser;
350	/** Context/user specific #2. */
351	uint8_t bUser2;
352	} KMKCCEXPSUBPROGORPLAIN;
353	#pragma pack()
354	typedef KMKCCEXPSUBPROGORPLAIN *PKMKCCEXPSUBPROGORPLAIN;
355	KMK_CC_STATIC_ASSERT( sizeof(void *) == 8
356	? sizeof(KMKCCEXPSUBPROGORPLAIN) == 16
357	: sizeof(void *) == 4
358	? sizeof(KMKCCEXPSUBPROGORPLAIN) == 12
359	: 1);
360
361	/**
362	* kKmkCcExpInstr_CopyString instruction format.
363	*/
364	typedef struct kmk_cc_exp_copy_string
365	{
366	/** The core instruction. */
367	KMKCCEXPCORE Core;
368	/** The number of bytes to copy. */
369	uint32_t cchCopy;
370	/** Pointer to the source string (not terminated at cchCopy). */
371	const char *pachSrc;
372	} KMKCCEXPCOPYSTRING;
373	typedef KMKCCEXPCOPYSTRING *PKMKCCEXPCOPYSTRING;
374
375	/**
376	* kKmkCcExpInstr_PlainVariable instruction format.
377	*/
378	typedef struct kmk_cc_exp_plain_variable
379	{
380	/** The core instruction. */
381	KMKCCEXPCORE Core;
382	/** The name of the variable (points into variable_strcache). */
383	const char *pszName;
384	} KMKCCEXPPLAINVAR;
385	typedef KMKCCEXPPLAINVAR *PKMKCCEXPPLAINVAR;
386
387	/**
388	* kKmkCcExpInstr_DynamicVariable instruction format.
389	*/
390	typedef struct kmk_cc_exp_dynamic_variable
391	{
392	/** The core instruction. */
393	KMKCCEXPCORE Core;
394	/** The subprogram that will give us the variable name. */
395	KMKCCEXPSUBPROG Subprog;
396	/** Where to continue after this instruction. (This is necessary since the
397	* instructions of the subprogram are emitted after this instruction.) */
398	PKMKCCEXPCORE pNext;
399	} KMKCCEXPDYNVAR;
400	typedef KMKCCEXPDYNVAR *PKMKCCEXPDYNVAR;
401
402	/**
403	* kKmkCcExpInstr_SearchAndReplacePlainVariable instruction format.
404	*/
405	typedef struct kmk_cc_exp_sr_plain_variable
406	{
407	/** The core instruction. */
408	KMKCCEXPCORE Core;
409	/** Where to continue after this instruction. (This is necessary since the
410	* instruction contains string data of variable size.) */
411	PKMKCCEXPCORE pNext;
412	/** The name of the variable (points into variable_strcache). */
413	const char *pszName;
414	/** Search pattern. */
415	const char *pszSearchPattern;
416	/** Replacement pattern. */
417	const char *pszReplacePattern;
418	/** Offset into pszSearchPattern of the significant '%' char. */
419	uint32_t offPctSearchPattern;
420	/** Offset into pszReplacePattern of the significant '%' char. */
421	uint32_t offPctReplacePattern;
422	} KMKCCEXPSRPLAINVAR;
423	typedef KMKCCEXPSRPLAINVAR *PKMKCCEXPSRPLAINVAR;
424
425	/**
426	* Instruction format parts common to both kKmkCcExpInstr_PlainFunction and
427	* kKmkCcExpInstr_DynamicFunction.
428	*/
429	typedef struct kmk_cc_exp_function_core
430	{
431	/** The core instruction. */
432	KMKCCEXPCORE Core;
433	/** Number of arguments. */
434	uint32_t cArgs; /*< @todo uint16_t to save 7 bytes of unecessary alignment padding on 64-bit systems, or merge fDirty into this member. /
435	/** Set if the function could be modifying the input arguments. */
436	uint8_t fDirty;
437	/** Where to continue after this instruction. (This is necessary since the
438	* instructions are of variable size and may be followed by string data.) */
439	PKMKCCEXPCORE pNext;
440	/**
441	* Pointer to the function table entry.
442	*
443	* @returns New variable buffer position.
444	* @param pchDst Current variable buffer position.
445	* @param papszArgs Pointer to a NULL terminated array of argument strings.
446	* @param pszFuncName The name of the function being called.
447	*/
448	char * (pfnFunction)(char pchDst, char *papszArgs, const char pszFuncName);
449	/** Pointer to the function name in the variable string cache. */
450	const char *pszFuncName;
451	} KMKCCEXPFUNCCORE;
452	typedef KMKCCEXPFUNCCORE *PKMKCCEXPFUNCCORE;
453
454	/**
455	* Instruction format for kKmkCcExpInstr_PlainFunction.
456	*/
457	typedef struct kmk_cc_exp_plain_function
458	{
459	/** The bits comment to both plain and dynamic functions. */
460	KMKCCEXPFUNCCORE FnCore;
461	/** Variable sized argument list (cArgs + 1 in length, last entry is NULL).
462	* The string pointers are to memory following this instruction, to memory in
463	* the next block or to memory in the variable / makefile we're working on
464	* (if zero terminated appropriately). */
465	const char *apszArgs[1];
466	} KMKCCEXPPLAINFUNC;
467	typedef KMKCCEXPPLAINFUNC *PKMKCCEXPPLAINFUNC;
468	/** Calculates the size of an KMKCCEXPPLAINFUNC structure with the apszArgs
469	* member holding a_cArgs entries plus a NULL terminator. */
470	#define KMKCCEXPPLAINFUNC_SIZE(a_cArgs) KMK_CC_SIZEOF_VAR_STRUCT(KMKCCEXPDYNFUNC, aArgs, (a_cArgs) + 1)
471
472	/**
473	* Instruction format for kKmkCcExpInstr_DynamicFunction.
474	*/
475	typedef struct kmk_cc_exp_dyn_function
476	{
477	/** The bits comment to both plain and dynamic functions. */
478	KMKCCEXPFUNCCORE FnCore;
479	/** Variable sized argument list (FnCore.cArgs in length).
480	* The subprograms / strings are allocated after this array (or in the next
481	* block). */
482	KMKCCEXPSUBPROGORPLAIN aArgs[1];
483	} KMKCCEXPDYNFUNC;
484	typedef KMKCCEXPDYNFUNC *PKMKCCEXPDYNFUNC;
485	/** Calculates the size of an KMKCCEXPDYNFUNC structure with the apszArgs
486	* member holding a_cArgs entries (no zero terminator). */
487	#define KMKCCEXPDYNFUNC_SIZE(a_cArgs) KMK_CC_SIZEOF_VAR_STRUCT(KMKCCEXPDYNFUNC, aArgs, a_cArgs)
488
489	/**
490	* Instruction format for kKmkCcExpInstr_Jump.
491	*/
492	typedef struct kmk_cc_exp_jump
493	{
494	/** The core instruction. */
495	KMKCCEXPCORE Core;
496	/** Where to jump to (new instruction block, typically). */
497	PKMKCCEXPCORE pNext;
498	} KMKCCEXPJUMP;
499	typedef KMKCCEXPJUMP *PKMKCCEXPJUMP;
500
501	/**
502	* String expansion program.
503	*/
504	typedef struct kmk_cc_expandprog
505	{
506	/** Pointer to the first instruction for this program. */
507	PKMKCCEXPCORE pFirstInstr;
508	/** List of blocks for this program (LIFO). */
509	PKMKCCBLOCK pBlockTail;
510	/** Statistics. */
511	KMKCCEXPSTATS Stats;
512	#ifdef KMK_CC_STRICT
513	/** The hash of the input string. Used to check that we get all the change
514	* notifications we require. */
515	uint32_t uInputHash;
516	#endif
517	/** Reference count. */
518	uint32_t volatile cRefs;
519	} KMKCCEXPPROG;
520	/** Pointer to a string expansion program. */
521	typedef KMKCCEXPPROG *PKMKCCEXPPROG;
522
523	/** @} */
524
525
526	/** @addtogroup grp_kmk_cc_evalprog
527	* @{ */
528
529	/** Pointer to a makefile evaluation program. */
530	typedef struct kmk_cc_evalprog *PKMKCCEVALPROG;
531
532	/**
533	* Makefile evaluation instructions.
534	*/
535	typedef enum KMKCCEVALINSTR
536	{
537	/** Jump instruction - KMKCCEVALJUMP. */
538	kKmkCcEvalInstr_jump = 0,
539
540	/** [local\|override\|export] variable = value - KMKCCEVALASSIGN.
541	* @note Can be used for target-specific variables. */
542	kKmkCcEvalInstr_assign_recursive,
543	/** [local\|override\|export] variable := value - KMKCCEVALASSIGN.
544	* @note Can be used for target-specific variables. */
545	kKmkCcEvalInstr_assign_simple,
546	/** [local\|override\|export] variable += value - KMKCCEVALASSIGN.
547	* @note Can be used for target-specific variables. */
548	kKmkCcEvalInstr_assign_append,
549	/** [local\|override\|export] variable -= value - KMKCCEVALASSIGN.
550	* @note Can be used for target-specific variables. */
551	kKmkCcEvalInstr_assign_prepend,
552	/** [local\|override\|export] variable ?= value - KMKCCEVALASSIGN.
553	* @note Can be used for target-specific variables. */
554	kKmkCcEvalInstr_assign_if_new,
555	/** [local\|override\|export] define variable ... endef - KMKCCEVALASSIGNDEF. */
556	kKmkCcEvalInstr_assign_define,
557
558	/** export variable1 [variable2...] - KMKCCEVALEXPORT. */
559	kKmkCcEvalInstr_export,
560	/** unexport variable1 [variable2...] - KMKCCEVALEXPORT. */
561	kKmkCcEvalInstr_unexport,
562	/** export - KMKCCEVALCORE. */
563	kKmkCcEvalInstr_export_all,
564	/** unexport - KMKCCEVALCORE. */
565	kKmkCcEvalInstr_unexport_all,
566
567	/** [else] ifdef variable - KMKCCEVALIFDEFPLAIN. */
568	kKmkCcEvalInstr_ifdef_plain,
569	/** [else] ifndef variable - KMKCCEVALIFDEFPLAIN. */
570	kKmkCcEvalInstr_ifndef_plain,
571	/** [else] ifdef variable - KMKCCEVALIFDEFDYNAMIC. */
572	kKmkCcEvalInstr_ifdef_dynamic,
573	/** [else] ifndef variable - KMKCCEVALIFDEFDYNAMIC. */
574	kKmkCcEvalInstr_ifndef_dynamic,
575	/** [else] ifeq (a,b) - KMKCCEVALIFEQ. */
576	kKmkCcEvalInstr_ifeq,
577	/** [else] ifeq (a,b) - KMKCCEVALIFEQ. */
578	kKmkCcEvalInstr_ifneq,
579	/** [else] if1of (set-a,set-b) - KMKCCEVALIF1OF. */
580	kKmkCcEvalInstr_if1of,
581	/** [else] ifn1of (set-a,set-b) - KMKCCEVALIF1OF. */
582	kKmkCcEvalInstr_ifn1of,
583	/** [else] if expr - KMKCCEVALIFEXPR. */
584	kKmkCcEvalInstr_if,
585
586	/** include file1 [file2...] - KMKCCEVALINCLUDE. */
587	kKmkCcEvalInstr_include,
588	/** [sinclude\|-include] file1 [file2...] - KMKCCEVALINCLUDE. */
589	kKmkCcEvalInstr_include_silent,
590	/** includedep file1 [file2...] - KMKCCEVALINCLUDE. */
591	kKmkCcEvalInstr_includedep,
592	/** includedep-queue file1 [file2...] - KMKCCEVALINCLUDE. */
593	kKmkCcEvalInstr_includedep_queue,
594	/** includedep-flush file1 [file2...] - KMKCCEVALINCLUDE. */
595	kKmkCcEvalInstr_includedep_flush,
596
597	/** Recipe without commands (defines dependencies) - KMKCCEVALRECIPE. */
598	kKmkCcEvalInstr_recipe_no_commands,
599	/** Recipe with commands (defines dependencies) - KMKCCEVALRECIPE. */
600	kKmkCcEvalInstr_recipe_start_normal,
601	/** Recipe with commands (defines dependencies) - KMKCCEVALRECIPE. */
602	kKmkCcEvalInstr_recipe_start_double_colon,
603	/** Recipe with commands (defines dependencies) - KMKCCEVALRECIPE. */
604	kKmkCcEvalInstr_recipe_start_pattern,
605	/** Adds more commands to the current recipe - KMKCCEVALRECIPECOMMANDS. */
606	kKmkCcEvalInstr_recipe_commands,
607	/** Special instruction for indicating the end of the recipe commands - KMKCCEVALCORE. */
608	kKmkCcEvalInstr_recipe_end,
609	/** Cancel previously defined pattern rule - KMKCCEVALRECIPE. */
610	kKmkCcEvalInstr_recipe_cancel_pattern,
611
612	/** vpath pattern directories - KMKCCEVALVPATH. */
613	kKmkCcEvalInstr_vpath,
614	/** vpath pattern directories - KMKCCEVALVPATH. */
615	kKmkCcEvalInstr_vpath_clear_pattern,
616	/** vpath - KMKCCEVALCORE. */
617	kKmkCcEvalInstr_vpath_clear_all,
618
619	/** The end of valid instructions (exclusive). */
620	kKmkCcEvalInstr_End
621	} KMKCCEVALINSTR;
622
623	/**
624	* Instruction core common to all instructions.
625	*/
626	typedef struct kmk_cc_eval_core
627	{
628	/** The instruction opcode number (KMKCCEVALINSTR). */
629	KMKCCEVALINSTR enmOpcode;
630	/** The line number in the source this statement is associated with. */
631	unsigned iLine;
632	} KMKCCEVALCORE;
633	/** Pointer to an instruction core structure. */
634	typedef KMKCCEVALCORE *PKMKCCEVALCORE;
635
636	/**
637	* Instruction format for kKmkCcEvalInstr_jump.
638	*/
639	typedef struct kmk_cc_eval_jump
640	{
641	/** The core instruction. */
642	KMKCCEVALCORE Core;
643	/** Where to jump to (new instruction block or endif, typically). */
644	PKMKCCEVALCORE pNext;
645	} KMKCCEVALJUMP;
646	typedef KMKCCEVALJUMP *PKMKCCEVALJUMP;
647
648	/**
649	* Instruction format for kKmkCcEvalInstr_assign_recursive,
650	* kKmkCcEvalInstr_assign_simple, kKmkCcEvalInstr_assign_append,
651	* kKmkCcEvalInstr_assign_prepend and kKmkCcEvalInstr_assign_if_new.
652	*/
653	typedef struct kmk_cc_eval_assign
654	{
655	/** The core instruction. */
656	KMKCCEVALCORE Core;
657	/** Whether the 'export' qualifier was used. */
658	uint8_t fExport;
659	/** Whether the 'override' qualifier was used. */
660	uint8_t fOverride;
661	/** Whether the 'local' qualifier was used. */
662	uint8_t fLocal;
663	/** Whether the 'private' qualifier was used. */
664	uint8_t fPrivate;
665	/** The variable name.
666	* @remarks Plain text names are in variable_strcache. */
667	KMKCCEXPSUBPROGORPLAIN Variable;
668	/** The value or value expression. */
669	KMKCCEXPSUBPROGORPLAIN Value;
670	/** Pointer to the next instruction. */
671	PKMKCCEVALCORE pNext;
672	} KMKCCEVALASSIGN;
673	typedef KMKCCEVALASSIGN *PKMKCCEVALASSIGN;
674
675	/**
676	* Instruction format for kKmkCcEvalInstr_assign_define.
677	*/
678	typedef struct kmk_cc_eval_assign_define
679	{
680	/** The assignment core structure. */
681	KMKCCEVALASSIGN AssignCore;
682	/** Makefile evaluation program compiled from the define.
683	* NULL if it does not compile.
684	* @todo Let's see if this is actually doable... */
685	PKMKCCEVALPROG pEvalProg;
686	} KMKCCEVALASSIGNDEF;
687	typedef KMKCCEVALASSIGNDEF *PKMKCCEVALASSIGNDEF;
688
689	/**
690	* Instruction format for kKmkCcEvalInstr_export and kKmkCcEvalInstr_unexport.
691	*/
692	typedef struct kmk_cc_eval_export
693	{
694	/** The core instruction. */
695	KMKCCEVALCORE Core;
696	/** The number of variables named in aVars. */
697	uint32_t cVars;
698	/** Pointer to the next instruction. */
699	PKMKCCEVALCORE pNext;
700	/** The variable names.
701	* Expressions will be expanded and split on space.
702	* @remarks Plain text names are in variable_strcache. */
703	KMKCCEXPSUBPROGORPLAIN aVars[1];
704	} KMKCCEVALEXPORT;
705	typedef KMKCCEVALEXPORT *PKMKCCEVALEXPORT;
706	/** Calculates the size of an KMKCCEVALEXPORT structure for @a a_cVars. */
707	#define KMKCCEVALEXPORT_SIZE(a_cVars) KMK_CC_SIZEOF_VAR_STRUCT(KMKCCEVALVPATH, aVars, a_cVars)
708
709	/**
710	* Core structure for all conditionals (kKmkCcEvalInstr_if*).
711	*/
712	typedef struct kmk_cc_eval_if_core
713	{
714	/** The core instruction. */
715	KMKCCEVALCORE Core;
716	/** Condition true: Pointer to the next instruction. */
717	PKMKCCEVALCORE pNextTrue;
718	/** Condition false: Pointer to the next instruction (i.e. 'else if*'
719	* or whatever follows 'else' / 'endif'. */
720	PKMKCCEVALCORE pNextFalse;
721	/** Pointer to the previous conditional for 'else if*' directives.
722	* This is only to assist the compilation process. */
723	struct kmk_cc_eval_if_core *pPrevCond;
724	/** Pointer to the jump out of the true block, if followed by 'else'.
725	* This is only to assist the compilation process. */
726	PKMKCCEVALJUMP pTrueEndJump;
727	} KMKCCEVALIFCORE;
728	typedef KMKCCEVALIFCORE *PKMKCCEVALIFCORE;
729
730	/**
731	* Instruction format for kKmkCcEvalInstr_ifdef_plain and
732	* kKmkCcEvalInstr_ifndef_plain.
733	* The variable name is known at compilation time.
734	*/
735	typedef struct kmk_cc_eval_ifdef_plain
736	{
737	/** The 'if' core structure. */
738	KMKCCEVALIFCORE IfCore;
739	/** The name of the variable (points into variable_strcache). */
740	const char *pszName;
741	} KMKCCEVALIFDEFPLAIN;
742	typedef KMKCCEVALIFDEFPLAIN *PKMKCCEVALIFDEFPLAIN;
743
744	/**
745	* Instruction format for kKmkCcEvalInstr_ifdef_dynamic and
746	* kKmkCcEvalInstr_ifndef_dynamic.
747	* The variable name is dynamically expanded at run time.
748	*/
749	typedef struct kmk_cc_eval_ifdef_dynamic
750	{
751	/** The 'if' core structure. */
752	KMKCCEVALIFCORE IfCore;
753	/** The subprogram that will give us the variable name. */
754	KMKCCEXPSUBPROG NameSubprog;
755	} KMKCCEVALIFDEFDYNAMIC;
756	typedef KMKCCEVALIFDEFDYNAMIC *PKMKCCEVALIFDEFDYNAMIC;
757
758	/**
759	* Instruction format for kKmkCcEvalInstr_ifeq and kKmkCcEvalInstr_ifneq.
760	*/
761	typedef struct kmk_cc_eval_ifeq
762	{
763	/** The 'if' core structure. */
764	KMKCCEVALIFCORE IfCore;
765	/** The left hand side string expression (dynamic or plain). */
766	KMKCCEXPSUBPROGORPLAIN Left;
767	/** The rigth hand side string expression (dynamic or plain). */
768	KMKCCEXPSUBPROGORPLAIN Right;
769	} KMKCCEVALIFEQ;
770	typedef KMKCCEVALIFEQ *PKMKCCEVALIFEQ;
771
772	/**
773	* Instruction format for kKmkCcEvalInstr_if1of and kKmkCcEvalInstr_ifn1of.
774	*
775	* @todo This can be optimized further by pre-hashing plain text items. One of
776	* the sides are usually plain text.
777	*/
778	typedef struct kmk_cc_eval_if1of
779	{
780	/** The 'if' core structure. */
781	KMKCCEVALIFCORE IfCore;
782	/** The left hand side string expression (dynamic or plain). */
783	KMKCCEXPSUBPROGORPLAIN Left;
784	/** The rigth hand side string expression (dynamic or plain). */
785	KMKCCEXPSUBPROGORPLAIN Right;
786	} KMKCCEVALIF1OF;
787	typedef KMKCCEVALIF1OF *PKMKCCEVALIF1OF;
788
789	/**
790	* Instruction format for kKmkCcEvalInstr_if.
791	*
792	* @todo Parse and compile the expression. At least strip whitespace in it.
793	*/
794	typedef struct kmk_cc_eval_if_expr
795	{
796	/** The 'if' core structure. */
797	KMKCCEVALIFCORE IfCore;
798	/** The expression string length. */
799	uint16_t cchExpr;
800	/** The expression string. */
801	char szExpr[1];
802	} KMKCCEVALIFEXPR;
803	typedef KMKCCEVALIFEXPR *PKMKCCEVALIFEXPR;
804	/** Calculates the size of an KMKCCEVALIFEXPR structure for @a a_cchExpr long
805	* expression string (terminator is automatically added). */
806	#define KMKCCEVALIFEXPR_SIZE(a_cchExpr) KMK_CC_BLOCK_ALIGN_SIZE(KMK_CC_SIZEOF_VAR_STRUCT(KMKCCEVALIFEXPR, szExpr, (a_cchExpr) + 1))
807
808	/**
809	* Instruction format for kKmkCcEvalInstr_include,
810	* kKmkCcEvalInstr_include_silent, kKmkCcEvalInstr_includedep,
811	* kKmkCcEvalInstr_includedep_queue, kKmkCcEvalInstr_includedep_flush.
812	*/
813	typedef struct kmk_cc_eval_include
814	{
815	/** The core instruction. */
816	KMKCCEVALCORE Core;
817	/** The number of files. */
818	uint32_t cFiles;
819	/** Pointer to the next instruction (subprogs and strings after this one). */
820	PKMKCCEVALCORE pNext;
821	/** The files to be included.
822	* Expressions will be expanded and split on space.
823	* @todo Plain text file name could be replaced by file string cache entries. */
824	KMKCCEXPSUBPROGORPLAIN aFiles[1];
825	} KMKCCEVALINCLUDE;
826	typedef KMKCCEVALINCLUDE *PKMKCCEVALINCLUDE;
827	/** Calculates the size of an KMKCCEVALINCLUDE structure for @a a_cFiles files. */
828	#define KMKCCEVALINCLUDE_SIZE(a_cFiles) KMK_CC_SIZEOF_VAR_STRUCT(KMKCCEVALINCLUDE, aFiles, a_cFiles)
829
830	/**
831	* Instruction format for kKmkCcEvalInstr_recipe_no_commands,
832	* kKmkCcEvalInstr_recipe_start_normal,
833	* kKmkCcEvalInstr_recipe_start_double_colon, kKmkCcEvalInstr_includedep_queue,
834	* kKmkCcEvalInstr_recipe_start_pattern.
835	*/
836	typedef struct kmk_cc_eval_recipe
837	{
838	/** The core instruction. */
839	KMKCCEVALCORE Core;
840	/** The total number of files and dependencies in aFilesAndDeps. */
841	uint16_t cFilesAndDeps;
842
843	/** Number of targets (from index 0).
844	* This is always 1 if this is an explicit multitarget or pattern recipe,
845	* indicating the main target. */
846	uint16_t cTargets;
847	/** Explicit multitarget & patterns: First always made target. */
848	uint16_t iFirstAlwaysMadeTargets;
849	/** Explicit multitarget & patterns: Number of always targets. */
850	uint16_t cAlwaysMadeTargets;
851	/** Explicit multitarget: First maybe made target. */
852	uint16_t iFirstMaybeTarget;
853	/** Explicit multitarget: Number of maybe made targets. */
854	uint16_t cMaybeTargets;
855
856	/** First dependency. */
857	uint16_t iFirstDep;
858	/** Number of ordinary dependnecies. */
859	uint16_t cDeps;
860	/** First order only dependency. */
861	uint16_t iFirstOrderOnlyDep;
862	/** Number of ordinary dependnecies. */
863	uint16_t cOrderOnlyDeps;
864
865	/** Pointer to the next instruction (subprogs and strings after this one). */
866	PKMKCCEVALCORE pNext;
867	/** The .MUST_MAKE variable value, if present.
868	* If not present, this is a zero length plain string. */
869	KMKCCEXPSUBPROGORPLAIN MustMake;
870	/** The target files and dependencies.
871	* This is sorted into several sections, as defined by the above indexes and
872	* counts. Expressions will be expanded and split on space.
873	*
874	* The KMKCCEXPSUBPROGORPLAIN::bUser member one of KMKCCEVALRECIPE_FD_XXX.
875	*
876	* @todo Plain text file name could be replaced by file string cache entries. */
877	KMKCCEXPSUBPROGORPLAIN aFilesAndDeps[1];
878	} KMKCCEVALRECIPE;
879	typedef KMKCCEVALRECIPE *PKMKCCEVALRECIPE;
880	/** Calculates the size of an KMKCCEVALRECIPE structure for @a a_cFiles
881	* files. */
882	#define KMKCCEVALRECIPE_SIZE(a_cFilesAndDeps) KMK_CC_SIZEOF_VAR_STRUCT(KMKCCEVALRECIPE, aFilesAndDeps, a_cFilesAndDeps)
883	/** @name KMKCCEVALRECIPE_FD_XXX - Values for KMKCCEVALRECIPE::aFilesAndDeps[x].bUser
884	* @{ */
885	#define KMKCCEVALRECIPE_FD_NORMAL 0
886	#define KMKCCEVALRECIPE_FD_SEC_EXP 1
887	#define KMKCCEVALRECIPE_FD_SPECIAL_POSIX 2
888	#define KMKCCEVALRECIPE_FD_SPECIAL_SECONDEXPANSION 3
889	#define KMKCCEVALRECIPE_FD_SPECIAL_ONESHELL 4
890	/** @} */
891
892
893	/**
894	* Instruction format for kKmkCcEvalInstr_recipe_commands.
895	*/
896	typedef struct kmk_cc_eval_recipe_commands
897	{
898	/** The core instruction. */
899	KMKCCEVALCORE Core;
900	/** The number of search directories. */
901	uint32_t cCommands;
902	/** Pointer to the next instruction (subprogs and strings after this one). */
903	PKMKCCEVALCORE pNext;
904	/** Commands to add to the current recipe.
905	* Expressions will be expanded and split on space. */
906	KMKCCEXPSUBPROGORPLAIN aCommands[1];
907	} KMKCCEVALRECIPECOMMANDS;
908	typedef KMKCCEVALRECIPECOMMANDS *PKMKCCEVALRECIPECOMMANDS;
909	/** Calculates the size of an KMKCCEVALRECIPECOMMANDS structure for
910	* @a a_cCommands commands. */
911	#define KMKCCEVALRECIPECOMMANDS_SIZE(a_cCommands) KMK_CC_SIZEOF_VAR_STRUCT(KMKCCEVALRECIPECOMMANDS, aCommands, a_cCommands)
912
913	/**
914	* Instruction format for kKmkCcEvalInstr_vpath and
915	* kKmkCcEvalInstr_vpath_clear_pattern.
916	*/
917	typedef struct kmk_cc_eval_vpath
918	{
919	/** The core instruction. */
920	KMKCCEVALCORE Core;
921	/** The number of search directories.
922	* This will be zero for kKmkCcEvalInstr_vpath_clear_pattern. */
923	uint32_t cDirs;
924	/** Pointer to the next instruction (subprogs and strings after this one). */
925	PKMKCCEVALCORE pNext;
926	/** The pattern. */
927	KMKCCEXPSUBPROGORPLAIN Pattern;
928	/** The directory. Expressions will be expanded and split on space. */
929	KMKCCEXPSUBPROGORPLAIN aDirs[1];
930	} KMKCCEVALVPATH;
931	typedef KMKCCEVALVPATH *PKMKCCEVALVPATH;
932	/** Calculates the size of an KMKCCEVALVPATH structure for @a a_cFiles files. */
933	#define KMKCCEVALVPATH_SIZE(a_cFiles) KMK_CC_SIZEOF_VAR_STRUCT(KMKCCEVALVPATH, aDirs, a_cDirs)
934
935
936	/**
937	* Makefile evaluation program.
938	*/
939	typedef struct kmk_cc_evalprog
940	{
941	/** Pointer to the first instruction for this program. */
942	PKMKCCEVALCORE pFirstInstr;
943	/** List of blocks for this program (LIFO). */
944	PKMKCCBLOCK pBlockTail;
945	/** The name of the file containing this program. */
946	const char *pszFilename;
947	/** The name of the variable containing this program, if applicable. */
948	const char *pszVarName;
949	#ifdef KMK_CC_STRICT
950	/** The hash of the input string. Used to check that we get all the change
951	* notifications we require. */
952	uint32_t uInputHash;
953	#endif
954	/** Reference count. */
955	uint32_t volatile cRefs;
956	} KMKCCEVALPROG;
957	typedef KMKCCEVALPROG *PKMKCCEVALPROG;
958
959	/** @} */
960
961
962	/*********************************************************************************************************************************
963	* Global Variables *
964	*********************************************************************************************************************************/
965	static uint32_t g_cVarForExpandCompilations = 0;
966	static uint32_t g_cVarForExpandExecs = 0;
967	static uint32_t g_cVarForEvalCompilations = 0;
968	static uint32_t g_cVarForEvalExecs = 0;
969	static uint32_t g_cFileForEvalCompilations = 0;
970	static uint32_t g_cFileForEvalExecs = 0;
971	#ifdef KMK_CC_WITH_STATS
972	static uint32_t g_cBlockAllocated = 0;
973	static uint32_t g_cbAllocated = 0;
974
975	static uint32_t g_cBlocksAllocatedExpProgs = 0;
976	static uint32_t g_cbAllocatedExpProgs = 0;
977	static uint32_t g_cSingleBlockExpProgs = 0;
978	static uint32_t g_cTwoBlockExpProgs = 0;
979	static uint32_t g_cMultiBlockExpProgs = 0;
980	static uint32_t g_cbUnusedMemExpProgs = 0;
981
982	static uint32_t g_cBlocksAllocatedEvalProgs = 0;
983	static uint32_t g_cbAllocatedEvalProgs = 0;
984	static uint32_t g_cSingleBlockEvalProgs = 0;
985	static uint32_t g_cTwoBlockEvalProgs = 0;
986	static uint32_t g_cMultiBlockEvalProgs = 0;
987	static uint32_t g_cbUnusedMemEvalProgs = 0;
988
989	#endif
990
991	/** Generic character classification, taking an 'unsigned char' index.
992	* ASSUMES unsigned char is 8-bits. */
993	static uint16_t g_abEvalCcChars[256];
994
995
996	/**
997	* Makefile evaluation keywords.
998	*/
999	static const char * const g_apszEvalKeywords[] =
1000	{
1001	"define",
1002	"export",
1003	"else",
1004	"endef",
1005	"endif",
1006	"ifdef",
1007	"ifndef",
1008	"ifeq",
1009	"ifneq",
1010	"if1of",
1011	"ifn1of",
1012	"if",
1013	"include",
1014	"includedep",
1015	"includedep-queue",
1016	"includedep-flush",
1017	"local",
1018	"override",
1019	"private",
1020	"sinclude",
1021	"unexport",
1022	"undefine",
1023	"vpath",
1024	"-include",
1025	};
1026
1027
1028	/** This is parallel to KMKCCEVALINSTR. */
1029	static const char * const g_apszEvalInstrNms[] =
1030	{
1031	"jump",
1032	"assign_recursive",
1033	"assign_simple",
1034	"assign_append",
1035	"assign_prepend",
1036	"assign_if_new",
1037	"assign_define",
1038	"export",
1039	"unexport",
1040	"export_all",
1041	"unexport_all",
1042	"ifdef_plain",
1043	"ifndef_plain",
1044	"ifdef_dynamic",
1045	"ifndef_dynamic",
1046	"ifeq",
1047	"ifneq",
1048	"if1of",
1049	"ifn1of",
1050	"if",
1051	"include",
1052	"include_silent",
1053	"includedep",
1054	"includedep_queue",
1055	"includedep_flush",
1056	"recipe_no_commands",
1057	"recipe_start_normal",
1058	"recipe_start_double_colon",
1059	"recipe_start_pattern",
1060	"recipe_commands",
1061	"recipe_end",
1062	"recipe_cancel_pattern",
1063	"vpath",
1064	"vpath_clear_pattern",
1065	"vpath_clear_all",
1066	};
1067
1068	/*********************************************************************************************************************************
1069	* Internal Functions *
1070	*********************************************************************************************************************************/
1071	static int kmk_cc_exp_compile_subprog(PKMKCCBLOCK ppBlockTail, const char pchStr, uint32_t cchStr, PKMKCCEXPSUBPROG pSubprog);
1072	static char kmk_exec_expand_subprog_to_tmp(PKMKCCEXPSUBPROG pSubprog, uint32_t pcch);
1073
1074
1075	/**
1076	* Initializes global variables for the 'compiler'.
1077	*/
1078	void kmk_cc_init(void)
1079	{
1080	unsigned i;
1081
1082	/*
1083	* Initialize the bitmap.
1084	*/
1085	memset(g_abEvalCcChars, 0, sizeof(g_abEvalCcChars));
1086
1087	/* blank chars */
1088	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, ' ', KMK_CC_EVAL_CH_BLANK);
1089	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\t', KMK_CC_EVAL_CH_BLANK);
1090
1091	/* space chars and zero terminator. */
1092	#define MY_SPACE_BITS KMK_CC_EVAL_CH_SPACE \| KMK_CC_EVAL_CH_SPACE_OR_BACKSLASH \| KMK_CC_EVAL_CH_SPACE_VAR_OR_RECIPE
1093	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, ' ', MY_SPACE_BITS);
1094	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\t', MY_SPACE_BITS);
1095	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\n', MY_SPACE_BITS \| KMK_CC_EVAL_CH_EOL_CANDIDATE);
1096	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\v', MY_SPACE_BITS);
1097	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\f', MY_SPACE_BITS);
1098	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\r', MY_SPACE_BITS \| KMK_CC_EVAL_CH_EOL_CANDIDATE);
1099	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\\', KMK_CC_EVAL_CH_SPACE_OR_BACKSLASH \| KMK_CC_EVAL_CH_SPACE_VAR_OR_RECIPE);
1100	#undef MY_SPACE_BITS
1101
1102	/* keywords */
1103	for (i = 0; i < K_ELEMENTS(g_apszEvalKeywords); i++)
1104	{
1105	size_t cch = strlen(g_apszEvalKeywords[i]);
1106	KMK_CC_ASSERT(cch >= KMK_CC_EVAL_KEYWORD_MIN);
1107	KMK_CC_ASSERT(cch <= KMK_CC_EVAL_KEYWORD_MAX);
1108
1109	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, g_apszEvalKeywords[i][0], KMK_CC_EVAL_CH_1ST_IN_KEYWORD);
1110	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, g_apszEvalKeywords[i][1], KMK_CC_EVAL_CH_2ND_IN_KEYWORD);
1111	}
1112	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, 'd', KMK_CC_EVAL_CH_1ST_IN_VARIABLE_KEYWORD); /* define */
1113	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, 'e', KMK_CC_EVAL_CH_1ST_IN_VARIABLE_KEYWORD); /* export (, endef) */
1114	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, 'l', KMK_CC_EVAL_CH_1ST_IN_VARIABLE_KEYWORD); /* local */
1115	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, 'o', KMK_CC_EVAL_CH_1ST_IN_VARIABLE_KEYWORD); /* override */
1116	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, 'p', KMK_CC_EVAL_CH_1ST_IN_VARIABLE_KEYWORD); /* private */
1117	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, 'u', KMK_CC_EVAL_CH_1ST_IN_VARIABLE_KEYWORD); /* undefine */
1118
1119	/* Assignment punctuation and recipe stuff. */
1120	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '=', KMK_CC_EVAL_CH_SPACE_VAR_OR_RECIPE);
1121	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, ':', KMK_CC_EVAL_CH_SPACE_VAR_OR_RECIPE);
1122
1123	/* For locating the end of variable expansion. */
1124	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '(', KMK_CC_EVAL_CH_PAREN_OR_SLASH);
1125	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, ')', KMK_CC_EVAL_CH_PAREN_OR_SLASH);
1126	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '{', KMK_CC_EVAL_CH_PAREN_OR_SLASH);
1127	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '}', KMK_CC_EVAL_CH_PAREN_OR_SLASH);
1128	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\\', KMK_CC_EVAL_CH_PAREN_OR_SLASH);
1129
1130	/* For parsing ifeq and if1of expressions. (GNU weirdly does not respect {} style function references.) */
1131	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '(', KMK_CC_EVAL_CH_PAREN_COMMA_OR_DOLLAR);
1132	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, ')', KMK_CC_EVAL_CH_PAREN_COMMA_OR_DOLLAR);
1133	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, ',', KMK_CC_EVAL_CH_PAREN_COMMA_OR_DOLLAR);
1134	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '$', KMK_CC_EVAL_CH_PAREN_COMMA_OR_DOLLAR);
1135
1136	/* Misc. */
1137	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '$', KMK_CC_EVAL_CH_DOLLAR);
1138	KMK_CC_EVAL_BM_OR(g_abEvalCcChars, '\\', KMK_CC_EVAL_CH_BACKSLASH);
1139
1140	/*
1141	* Check that the eval instruction names match up.
1142	*/
1143	KMK_CC_ASSERT(strcmp(g_apszEvalInstrNms[kKmkCcEvalInstr_ifneq], "ifneq") == 0);
1144	KMK_CC_ASSERT(strcmp(g_apszEvalInstrNms[kKmkCcEvalInstr_vpath_clear_all], "vpath_clear_all") == 0);
1145	}
1146
1147
1148	/**
1149	* Prints stats (for kmk -p).
1150	*/
1151	void kmk_cc_print_stats(void)
1152	{
1153	#ifdef KMK_CC_WITH_STATS
1154	uint32_t const cEvalCompilations = g_cFileForEvalCompilations + g_cVarForEvalCompilations;
1155	#endif
1156
1157	puts(_("\n# The kmk 'compiler' and kmk 'program executor':\n"));
1158
1159	printf(_("# Variables compiled for string expansion: %6u\n"), g_cVarForExpandCompilations);
1160	printf(_("# Variables string expansion runs: %6u\n"), g_cVarForExpandExecs);
1161	printf(_("# String expansion runs per compile: %6u\n"), g_cVarForExpandExecs / g_cVarForExpandCompilations);
1162	#ifdef KMK_CC_WITH_STATS
1163	printf(_("# Single alloc block exp progs: %6u (%u%%)\n"
1164	"# Two alloc block exp progs: %6u (%u%%)\n"
1165	"# Three or more alloc block exp progs: %6u (%u%%)\n"
1166	),
1167	g_cSingleBlockExpProgs, (uint32_t)((uint64_t)g_cSingleBlockExpProgs * 100 / g_cVarForExpandCompilations),
1168	g_cTwoBlockExpProgs, (uint32_t)((uint64_t)g_cTwoBlockExpProgs * 100 / g_cVarForExpandCompilations),
1169	g_cMultiBlockExpProgs, (uint32_t)((uint64_t)g_cMultiBlockExpProgs * 100 / g_cVarForExpandCompilations));
1170	printf(_("# Total amount of memory for exp progs: %8u bytes\n"
1171	"# in: %6u blocks\n"
1172	"# avg block size: %6u bytes\n"
1173	"# unused memory: %8u bytes (%u%%)\n"
1174	"# avg unused memory per block: %6u bytes\n"
1175	"\n"),
1176	g_cbAllocatedExpProgs, g_cBlocksAllocatedExpProgs, g_cbAllocatedExpProgs / g_cBlocksAllocatedExpProgs,
1177	g_cbUnusedMemExpProgs, (uint32_t)((uint64_t)g_cbUnusedMemExpProgs * 100 / g_cbAllocatedExpProgs),
1178	g_cbUnusedMemExpProgs / g_cBlocksAllocatedExpProgs);
1179	puts("");
1180	#endif
1181	printf(_("# Variables compiled for string eval: %6u\n"), g_cVarForEvalCompilations);
1182	printf(_("# Variables string eval runs: %6u\n"), g_cVarForEvalExecs);
1183	printf(_("# String evals runs per compile: %6u\n"), g_cVarForEvalExecs / g_cVarForEvalCompilations);
1184	printf(_("# Files compiled: %6u\n"), g_cFileForEvalCompilations);
1185	printf(_("# Files runs: %6u\n"), g_cFileForEvalExecs);
1186	printf(_("# Files eval runs per compile: %6u\n"), g_cFileForEvalExecs / g_cFileForEvalCompilations);
1187	#ifdef KMK_CC_WITH_STATS
1188	printf(_("# Single alloc block eval progs: %6u (%u%%)\n"
1189	"# Two alloc block eval progs: %6u (%u%%)\n"
1190	"# Three or more alloc block eval progs: %6u (%u%%)\n"
1191	),
1192	g_cSingleBlockEvalProgs, (uint32_t)((uint64_t)g_cSingleBlockEvalProgs * 100 / cEvalCompilations),
1193	g_cTwoBlockEvalProgs, (uint32_t)((uint64_t)g_cTwoBlockEvalProgs * 100 / cEvalCompilations),
1194	g_cMultiBlockEvalProgs, (uint32_t)((uint64_t)g_cMultiBlockEvalProgs * 100 / cEvalCompilations));
1195	printf(_("# Total amount of memory for eval progs: %8u bytes\n"
1196	"# in: %6u blocks\n"
1197	"# avg block size: %6u bytes\n"
1198	"# unused memory: %8u bytes (%u%%)\n"
1199	"# avg unused memory per block: %6u bytes\n"
1200	"\n"),
1201	g_cbAllocatedEvalProgs, g_cBlocksAllocatedEvalProgs, g_cbAllocatedEvalProgs / g_cBlocksAllocatedEvalProgs,
1202	g_cbUnusedMemEvalProgs, (uint32_t)((uint64_t)g_cbUnusedMemEvalProgs * 100 / g_cbAllocatedEvalProgs),
1203	g_cbUnusedMemEvalProgs / g_cBlocksAllocatedEvalProgs);
1204	puts("");
1205	printf(_("# Total amount of block mem allocated: %8u bytes\n"), g_cbAllocated);
1206	printf(_("# Total number of block allocated: %8u\n"), g_cBlockAllocated);
1207	printf(_("# Average block size: %8u byte\n"), g_cbAllocated / g_cBlockAllocated);
1208	#endif
1209
1210	puts("");
1211	}
1212
1213
1214	/*
1215	*
1216	* Various utility functions.
1217	* Various utility functions.
1218	* Various utility functions.
1219	*
1220	*/
1221
1222	/**
1223	* Counts the number of dollar chars in the string.
1224	*
1225	* @returns Number of dollar chars.
1226	* @param pchStr The string to search (does not need to be zero
1227	* terminated).
1228	* @param cchStr The length of the string.
1229	*/
1230	static uint32_t kmk_cc_count_dollars(const char *pchStr, uint32_t cchStr)
1231	{
1232	uint32_t cDollars = 0;
1233	const char *pch;
1234	while ((pch = memchr(pchStr, '$', cchStr)) != NULL)
1235	{
1236	cDollars++;
1237	cchStr -= pch - pchStr + 1;
1238	pchStr = pch + 1;
1239	}
1240	return cDollars;
1241	}
1242
1243	#ifdef KMK_CC_STRICT
1244	/**
1245	* Used to check that function arguments are left alone.
1246	* @returns Updated hash.
1247	* @param uHash The current hash value.
1248	* @param psz The string to hash.
1249	*/
1250	static uint32_t kmk_cc_debug_string_hash(uint32_t uHash, const char *psz)
1251	{
1252	unsigned char ch;
1253	while ((ch = (unsigned char const )psz++) != '\0')
1254	uHash = (uHash << 6) + (uHash << 16) - uHash + (unsigned char)ch;
1255	return uHash;
1256	}
1257
1258	/**
1259	* Used to check that function arguments are left alone.
1260	* @returns Updated hash.
1261	* @param uHash The current hash value.
1262	* @param pch The string to hash, not terminated.
1263	* @param cch The number of chars to hash.
1264	*/
1265	static uint32_t kmk_cc_debug_string_hash_n(uint32_t uHash, const char *pch, uint32_t cch)
1266	{
1267	while (cch-- > 0)
1268	{
1269	unsigned char ch = (unsigned char const )pch++;
1270	uHash = (uHash << 6) + (uHash << 16) - uHash + (unsigned char)ch;
1271	}
1272	return uHash;
1273	}
1274
1275	#endif
1276
1277
1278
1279	/*
1280	*
1281	* The allocator.
1282	* The allocator.
1283	* The allocator.
1284	*
1285	*/
1286
1287
1288	/**
1289	* For the first allocation using the block allocator.
1290	*
1291	* @returns Pointer to the first allocation (@a cbFirst in size).
1292	* @param ppBlockTail Where to return the pointer to the first block.
1293	* @param cbFirst The size of the first allocation.
1294	* @param cbHint Hint about how much memory we might be needing.
1295	*/
1296	static void kmk_cc_block_alloc_first(PKMKCCBLOCK ppBlockTail, size_t cbFirst, size_t cbHint)
1297	{
1298	uint32_t cbBlock;
1299	PKMKCCBLOCK pNewBlock;
1300
1301	KMK_CC_ASSERT_ALIGNED(cbFirst, sizeof(void *));
1302	KMK_CC_ASSERT(cbFirst <= 128);
1303
1304	/*
1305	* Turn the hint into a block size.
1306	*/
1307	cbHint += cbFirst;
1308	if (cbHint <= 512)
1309	{
1310	if (cbHint <= 256)
1311	{
1312	if (cbFirst <= 64)
1313	cbBlock = 128;
1314	else
1315	cbBlock = 256;
1316	}
1317	else
1318	cbBlock = 256;
1319	}
1320	else if (cbHint < 2048)
1321	cbBlock = 1024;
1322	else if (cbHint < 3072)
1323	cbBlock = 2048;
1324	else
1325	cbBlock = 4096;
1326
1327	/*
1328	* Allocate and initialize the first block.
1329	*/
1330	pNewBlock = (PKMKCCBLOCK)xmalloc(cbBlock);
1331	pNewBlock->cbBlock = cbBlock;
1332	pNewBlock->offNext = sizeof(*pNewBlock) + cbFirst;
1333	pNewBlock->pNext = NULL;
1334	*ppBlockTail = pNewBlock;
1335
1336	#ifdef KMK_CC_WITH_STATS
1337	g_cBlockAllocated++;
1338	g_cbAllocated += cbBlock;
1339	#endif
1340
1341	return pNewBlock + 1;
1342	}
1343
1344
1345	/**
1346	* Used for getting the address of the next instruction.
1347	*
1348	* @returns Pointer to the next allocation.
1349	* @param pBlockTail The allocator tail pointer.
1350	*/
1351	static void *kmk_cc_block_get_next_ptr(PKMKCCBLOCK pBlockTail)
1352	{
1353	return (char *)pBlockTail + pBlockTail->offNext;
1354	}
1355
1356
1357	/**
1358	* Realigns the allocator after doing byte or string allocations.
1359	*
1360	* @param ppBlockTail Pointer to the allocator tail pointer.
1361	*/
1362	static void kmk_cc_block_realign(PKMKCCBLOCK *ppBlockTail)
1363	{
1364	PKMKCCBLOCK pBlockTail = *ppBlockTail;
1365	if (pBlockTail->offNext & (sizeof(void *) - 1U))
1366	{
1367	pBlockTail->offNext = KMK_CC_BLOCK_ALIGN_SIZE(pBlockTail->offNext);
1368	KMK_CC_ASSERT(pBlockTail->cbBlock - pBlockTail->offNext >= sizeof(KMKCCEXPJUMP));
1369	}
1370	}
1371
1372
1373	/**
1374	* Grows the allocation with another block, byte allocator case.
1375	*
1376	* @returns Pointer to the byte allocation.
1377	* @param ppBlockTail Pointer to the allocator tail pointer.
1378	* @param cb The number of bytes to allocate.
1379	*/
1380	static void kmk_cc_block_byte_alloc_grow(PKMKCCBLOCK ppBlockTail, uint32_t cb)
1381	{
1382	PKMKCCBLOCK pOldBlock = *ppBlockTail;
1383	PKMKCCBLOCK pPrevBlock = pOldBlock->pNext;
1384	PKMKCCBLOCK pNewBlock;
1385	uint32_t cbBlock;
1386
1387	/*
1388	* Check if there accidentally is some space left in the previous block first.
1389	*/
1390	if ( pPrevBlock
1391	&& pPrevBlock->cbBlock - pPrevBlock->offNext >= cb)
1392	{
1393	void pvRet = (char )pPrevBlock + pPrevBlock->offNext;
1394	pPrevBlock->offNext += cb;
1395	return pvRet;
1396	}
1397
1398	/*
1399	* Allocate a new block.
1400	*/
1401
1402	/* Figure the block size. */
1403	cbBlock = pOldBlock->cbBlock;
1404	while (cbBlock - sizeof(KMKCCEXPJUMP) - sizeof(*pNewBlock) < cb)
1405	cbBlock *= 2;
1406
1407	/* Allocate and initialize the block it with the new instruction already accounted for. */
1408	pNewBlock = (PKMKCCBLOCK)xmalloc(cbBlock);
1409	pNewBlock->cbBlock = cbBlock;
1410	pNewBlock->offNext = sizeof(*pNewBlock) + cb;
1411	pNewBlock->pNext = pOldBlock;
1412	*ppBlockTail = pNewBlock;
1413
1414	#ifdef KMK_CC_WITH_STATS
1415	g_cBlockAllocated++;
1416	g_cbAllocated += cbBlock;
1417	#endif
1418
1419	return pNewBlock + 1;
1420	}
1421
1422
1423	/**
1424	* Make a byte allocation.
1425	*
1426	* Must call kmk_cc_block_realign() when done doing byte and string allocations.
1427	*
1428	* @returns Pointer to the byte allocation (byte aligned).
1429	* @param ppBlockTail Pointer to the allocator tail pointer.
1430	* @param cb The number of bytes to allocate.
1431	*/
1432	static void kmk_cc_block_byte_alloc(PKMKCCBLOCK ppBlockTail, uint32_t cb)
1433	{
1434	PKMKCCBLOCK pBlockTail = *ppBlockTail;
1435	uint32_t cbLeft = pBlockTail->cbBlock - pBlockTail->offNext;
1436
1437	KMK_CC_ASSERT(cbLeft >= sizeof(KMKCCEXPJUMP));
1438	if (cbLeft >= cb + sizeof(KMKCCEXPJUMP))
1439	{
1440	void pvRet = (char )pBlockTail + pBlockTail->offNext;
1441	pBlockTail->offNext += cb;
1442	return pvRet;
1443	}
1444	return kmk_cc_block_byte_alloc_grow(ppBlockTail, cb);
1445	}
1446
1447
1448	/**
1449	* Duplicates the given string in a byte allocation.
1450	*
1451	* Must call kmk_cc_block_realign() when done doing byte and string allocations.
1452	*
1453	* @returns Pointer to the byte allocation (byte aligned).
1454	* @param ppBlockTail Pointer to the allocator tail pointer.
1455	* @param cb The number of bytes to allocate.
1456	*/
1457	static const char kmk_cc_block_strdup(PKMKCCBLOCK ppBlockTail, const char *pachStr, uint32_t cchStr)
1458	{
1459	char *pszCopy;
1460	if (cchStr)
1461	{
1462	pszCopy = kmk_cc_block_byte_alloc(ppBlockTail, cchStr + 1);
1463	memcpy(pszCopy, pachStr, cchStr);
1464	pszCopy[cchStr] = '\0';
1465	return pszCopy;
1466	}
1467	return "";
1468	}
1469
1470
1471	/**
1472	* Grows the allocation with another block, string expansion program case.
1473	*
1474	* @returns Pointer to a string expansion instruction core.
1475	* @param ppBlockTail Pointer to the allocator tail pointer.
1476	* @param cb The number of bytes to allocate.
1477	*/
1478	static PKMKCCEXPCORE kmk_cc_block_alloc_exp_grow(PKMKCCBLOCK *ppBlockTail, uint32_t cb)
1479	{
1480	PKMKCCBLOCK pOldBlock = *ppBlockTail;
1481	PKMKCCBLOCK pNewBlock;
1482	PKMKCCEXPCORE pRet;
1483	PKMKCCEXPJUMP pJump;
1484
1485	/* Figure the block size. */
1486	uint32_t cbBlock = !pOldBlock->pNext ? 128 : pOldBlock->cbBlock;
1487	while (cbBlock - sizeof(KMKCCEXPJUMP) - sizeof(*pNewBlock) < cb)
1488	cbBlock *= 2;
1489
1490	/* Allocate and initialize the block it with the new instruction already accounted for. */
1491	pNewBlock = (PKMKCCBLOCK)xmalloc(cbBlock);
1492	pNewBlock->cbBlock = cbBlock;
1493	pNewBlock->offNext = sizeof(*pNewBlock) + cb;
1494	pNewBlock->pNext = pOldBlock;
1495	*ppBlockTail = pNewBlock;
1496
1497	#ifdef KMK_CC_WITH_STATS
1498	g_cBlockAllocated++;
1499	g_cbAllocated += cbBlock;
1500	#endif
1501
1502	pRet = (PKMKCCEXPCORE)(pNewBlock + 1);
1503	KMK_CC_ASSERT(((size_t)pRet & (sizeof(void *) - 1)) == 0);
1504
1505	/* Emit jump. */
1506	pJump = (PKMKCCEXPJUMP)((char *)pOldBlock + pOldBlock->offNext);
1507	pJump->Core.enmOpcode = kKmkCcExpInstr_Jump;
1508	pJump->pNext = pRet;
1509	pOldBlock->offNext += sizeof(*pJump);
1510	KMK_CC_ASSERT(pOldBlock->offNext <= pOldBlock->cbBlock);
1511
1512	return pRet;
1513	}
1514
1515
1516	/**
1517	* Allocates a string expansion instruction of size @a cb.
1518	*
1519	* @returns Pointer to a string expansion instruction core.
1520	* @param ppBlockTail Pointer to the allocator tail pointer.
1521	* @param cb The number of bytes to allocate.
1522	*/
1523	static PKMKCCEXPCORE kmk_cc_block_alloc_exp(PKMKCCBLOCK *ppBlockTail, uint32_t cb)
1524	{
1525	PKMKCCBLOCK pBlockTail = *ppBlockTail;
1526	uint32_t cbLeft = pBlockTail->cbBlock - pBlockTail->offNext;
1527
1528	KMK_CC_ASSERT(cbLeft >= sizeof(KMKCCEXPJUMP));
1529	KMK_CC_ASSERT( (cb & (sizeof(void ) - 1)) == 0 \|\| cb == sizeof(KMKCCEXPCORE) / final */ );
1530
1531	if (cbLeft >= cb + sizeof(KMKCCEXPJUMP))
1532	{
1533	PKMKCCEXPCORE pRet = (PKMKCCEXPCORE)((char *)pBlockTail + pBlockTail->offNext);
1534	pBlockTail->offNext += cb;
1535	KMK_CC_ASSERT(((size_t)pRet & (sizeof(void *) - 1)) == 0);
1536	return pRet;
1537	}
1538	return kmk_cc_block_alloc_exp_grow(ppBlockTail, cb);
1539	}
1540
1541
1542	/**
1543	* Grows the allocation with another block, makefile evaluation program case.
1544	*
1545	* @returns Pointer to a makefile evaluation instruction core.
1546	* @param ppBlockTail Pointer to the allocator tail pointer.
1547	* @param cb The number of bytes to allocate.
1548	*/
1549	static PKMKCCEVALCORE kmk_cc_block_alloc_eval_grow(PKMKCCBLOCK *ppBlockTail, uint32_t cb)
1550	{
1551	PKMKCCBLOCK pOldBlock = *ppBlockTail;
1552	PKMKCCBLOCK pNewBlock;
1553	PKMKCCEVALCORE pRet;
1554	PKMKCCEVALJUMP pJump;
1555
1556	/* Figure the block size. */
1557	uint32_t cbBlock = !pOldBlock->pNext ? 128 : pOldBlock->cbBlock;
1558	while (cbBlock - sizeof(KMKCCEVALJUMP) - sizeof(*pNewBlock) < cb)
1559	cbBlock *= 2;
1560
1561	/* Allocate and initialize the block it with the new instruction already accounted for. */
1562	pNewBlock = (PKMKCCBLOCK)xmalloc(cbBlock);
1563	pNewBlock->cbBlock = cbBlock;
1564	pNewBlock->offNext = sizeof(*pNewBlock) + cb;
1565	pNewBlock->pNext = pOldBlock;
1566	*ppBlockTail = pNewBlock;
1567
1568	#ifdef KMK_CC_WITH_STATS
1569	g_cBlockAllocated++;
1570	g_cbAllocated += cbBlock;
1571	#endif
1572
1573	pRet = (PKMKCCEVALCORE)(pNewBlock + 1);
1574
1575	/* Emit jump. */
1576	pJump = (PKMKCCEVALJUMP)((char *)pOldBlock + pOldBlock->offNext);
1577	pJump->Core.enmOpcode = kKmkCcEvalInstr_jump;
1578	pJump->pNext = pRet;
1579	pOldBlock->offNext += sizeof(*pJump);
1580	KMK_CC_ASSERT(pOldBlock->offNext <= pOldBlock->cbBlock);
1581
1582	return pRet;
1583	}
1584
1585
1586	/**
1587	* Allocates a makefile evaluation instruction of size @a cb.
1588	*
1589	* @returns Pointer to a makefile evaluation instruction core.
1590	* @param ppBlockTail Pointer to the allocator tail pointer.
1591	* @param cb The number of bytes to allocate.
1592	*/
1593	static PKMKCCEVALCORE kmk_cc_block_alloc_eval(PKMKCCBLOCK *ppBlockTail, uint32_t cb)
1594	{
1595	PKMKCCBLOCK pBlockTail = *ppBlockTail;
1596	uint32_t cbLeft = pBlockTail->cbBlock - pBlockTail->offNext;
1597
1598	KMK_CC_ASSERT(cbLeft >= sizeof(KMKCCEVALJUMP));
1599	KMK_CC_ASSERT( (cb & (sizeof(void *) - 1)) == 0 );
1600
1601	if (cbLeft >= cb + sizeof(KMKCCEVALJUMP))
1602	{
1603	PKMKCCEVALCORE pRet = (PKMKCCEVALCORE)((char *)pBlockTail + pBlockTail->offNext);
1604	pBlockTail->offNext += cb;
1605	return pRet;
1606	}
1607	return kmk_cc_block_alloc_eval_grow(ppBlockTail, cb);
1608	}
1609
1610
1611	/**
1612	* Frees all memory used by an allocator.
1613	*
1614	* @param ppBlockTail The allocator tail pointer.
1615	*/
1616	static void kmk_cc_block_free_list(PKMKCCBLOCK pBlockTail)
1617	{
1618	while (pBlockTail)
1619	{
1620	PKMKCCBLOCK pThis = pBlockTail;
1621	pBlockTail = pBlockTail->pNext;
1622	free(pThis);
1623	}
1624	}
1625
1626
1627	/*
1628	*
1629	* The string expansion compiler.
1630	* The string expansion compiler.
1631	* The string expansion compiler.
1632	*
1633	*/
1634
1635
1636	/**
1637	* Emits a kKmkCcExpInstr_Return.
1638	*
1639	* @param ppBlockTail Pointer to the allocator tail pointer.
1640	*/
1641	static void kmk_cc_exp_emit_return(PKMKCCBLOCK *ppBlockTail)
1642	{
1643	PKMKCCEXPCORE pCore = kmk_cc_block_alloc_exp(ppBlockTail, sizeof(*pCore));
1644	pCore->enmOpcode = kKmkCcExpInstr_Return;
1645	kmk_cc_block_realign(ppBlockTail);
1646	}
1647
1648
1649	/**
1650	* Checks if a function is known to mess up the arguments its given.
1651	*
1652	* When executing calls to "dirty" functions, all arguments must be duplicated
1653	* on the heap.
1654	*
1655	* @returns 1 if dirty, 0 if clean.
1656	* @param pszFunction The function name.
1657	*/
1658	static uint8_t kmk_cc_is_dirty_function(const char *pszFunction)
1659	{
1660	switch (pszFunction[0])
1661	{
1662	default:
1663	return 0;
1664
1665	case 'e':
1666	if (!strcmp(pszFunction, "eval"))
1667	return 1;
1668	if (!strcmp(pszFunction, "evalctx"))
1669	return 1;
1670	return 0;
1671
1672	case 'f':
1673	if (!strcmp(pszFunction, "filter"))
1674	return 1;
1675	if (!strcmp(pszFunction, "filter-out"))
1676	return 1;
1677	if (!strcmp(pszFunction, "for"))
1678	return 1;
1679	return 0;
1680
1681	case 's':
1682	if (!strcmp(pszFunction, "sort"))
1683	return 1;
1684	return 0;
1685	}
1686	}
1687
1688
1689	/**
1690	* Emits a function call instruction taking arguments that needs expanding.
1691	*
1692	* @returns 0 on success, non-zero on failure.
1693	* @param ppBlockTail Pointer to the allocator tail pointer.
1694	* @param pszFunction The function name (const string from function.c).
1695	* @param pchArgs Pointer to the arguments expression string, leading
1696	* any blanks has been stripped.
1697	* @param cchArgs The length of the arguments expression string.
1698	* @param cArgs Number of arguments found.
1699	* @param chOpen The char used to open the function call.
1700	* @param chClose The char used to close the function call.
1701	* @param pfnFunction The function implementation.
1702	* @param cMaxArgs Maximum number of arguments the function takes.
1703	*/
1704	static int kmk_cc_exp_emit_dyn_function(PKMKCCBLOCK ppBlockTail, const char pszFunction,
1705	const char *pchArgs, uint32_t cchArgs, uint32_t cArgs, char chOpen, char chClose,
1706	make_function_ptr_t pfnFunction, unsigned char cMaxArgs)
1707	{
1708	uint32_t iArg;
1709
1710	/*
1711	* The function instruction has variable size. The maximum argument count
1712	* isn't quite like the minium one. Zero means no limit. While a non-zero
1713	* value means that any commas beyond the max will be taken to be part of
1714	* the final argument.
1715	*/
1716	uint32_t cActualArgs = cArgs <= cMaxArgs \|\| !cMaxArgs ? cArgs : cMaxArgs;
1717	PKMKCCEXPDYNFUNC pInstr = (PKMKCCEXPDYNFUNC)kmk_cc_block_alloc_exp(ppBlockTail, KMKCCEXPDYNFUNC_SIZE(cActualArgs));
1718	pInstr->FnCore.Core.enmOpcode = kKmkCcExpInstr_DynamicFunction;
1719	pInstr->FnCore.cArgs = cActualArgs;
1720	pInstr->FnCore.pfnFunction = pfnFunction;
1721	pInstr->FnCore.pszFuncName = pszFunction;
1722	pInstr->FnCore.fDirty = kmk_cc_is_dirty_function(pszFunction);
1723
1724	/*
1725	* Parse the arguments. Plain arguments gets duplicated in the program
1726	* memory so that they are terminated and no extra processing is necessary
1727	* later on. ASSUMES that the function implementations do NOT change
1728	* argument memory. Other arguments the compiled into their own expansion
1729	* sub programs.
1730	*/
1731	iArg = 0;
1732	for (;;)
1733	{
1734	/* Find the end of the argument. Check for $. */
1735	char ch = '\0';
1736	uint8_t fDollar = 0;
1737	int32_t cDepth = 0;
1738	uint32_t cchThisArg = 0;
1739	while (cchThisArg < cchArgs)
1740	{
1741	ch = pchArgs[cchThisArg];
1742	if (ch == chClose)
1743	{
1744	KMK_CC_ASSERT(cDepth > 0);
1745	if (cDepth > 0)
1746	cDepth--;
1747	}
1748	else if (ch == chOpen)
1749	cDepth++;
1750	else if (ch == ',' && cDepth == 0 && iArg + 1 < cActualArgs)
1751	break;
1752	else if (ch == '$')
1753	fDollar = 1;
1754	cchThisArg++;
1755	}
1756
1757	pInstr->aArgs[iArg].fSubprog = fDollar;
1758	if (fDollar)
1759	{
1760	/* Compile it. */
1761	int rc;
1762	kmk_cc_block_realign(ppBlockTail);
1763	rc = kmk_cc_exp_compile_subprog(ppBlockTail, pchArgs, cchThisArg, &pInstr->aArgs[iArg].u.Subprog);
1764	if (rc != 0)
1765	return rc;
1766	}
1767	else
1768	{
1769	/* Duplicate it. */
1770	pInstr->aArgs[iArg].u.Plain.psz = kmk_cc_block_strdup(ppBlockTail, pchArgs, cchThisArg);
1771	pInstr->aArgs[iArg].u.Plain.cch = cchThisArg;
1772	}
1773	iArg++;
1774	if (ch != ',')
1775	break;
1776	pchArgs += cchThisArg + 1;
1777	cchArgs -= cchThisArg + 1;
1778	}
1779	KMK_CC_ASSERT(iArg == cActualArgs);
1780
1781	/*
1782	* Realign the allocator and take down the address of the next instruction.
1783	*/
1784	kmk_cc_block_realign(ppBlockTail);
1785	pInstr->FnCore.pNext = (PKMKCCEXPCORE)kmk_cc_block_get_next_ptr(*ppBlockTail);
1786	return 0;
1787	}
1788
1789
1790	/**
1791	* Emits a function call instruction taking plain arguments.
1792	*
1793	* @returns 0 on success, non-zero on failure.
1794	* @param ppBlockTail Pointer to the allocator tail pointer.
1795	* @param pszFunction The function name (const string from function.c).
1796	* @param pchArgs Pointer to the arguments string, leading any blanks
1797	* has been stripped.
1798	* @param cchArgs The length of the arguments string.
1799	* @param cArgs Number of arguments found.
1800	* @param chOpen The char used to open the function call.
1801	* @param chClose The char used to close the function call.
1802	* @param pfnFunction The function implementation.
1803	* @param cMaxArgs Maximum number of arguments the function takes.
1804	*/
1805	static void kmk_cc_exp_emit_plain_function(PKMKCCBLOCK ppBlockTail, const char pszFunction,
1806	const char *pchArgs, uint32_t cchArgs, uint32_t cArgs, char chOpen, char chClose,
1807	make_function_ptr_t pfnFunction, unsigned char cMaxArgs)
1808	{
1809	uint32_t iArg;
1810
1811	/*
1812	* The function instruction has variable size. The maximum argument count
1813	* isn't quite like the minium one. Zero means no limit. While a non-zero
1814	* value means that any commas beyond the max will be taken to be part of
1815	* the final argument.
1816	*/
1817	uint32_t cActualArgs = cArgs <= cMaxArgs \|\| !cMaxArgs ? cArgs : cMaxArgs;
1818	PKMKCCEXPPLAINFUNC pInstr = (PKMKCCEXPPLAINFUNC)kmk_cc_block_alloc_exp(ppBlockTail, KMKCCEXPPLAINFUNC_SIZE(cActualArgs));
1819	pInstr->FnCore.Core.enmOpcode = kKmkCcExpInstr_PlainFunction;
1820	pInstr->FnCore.cArgs = cActualArgs;
1821	pInstr->FnCore.pfnFunction = pfnFunction;
1822	pInstr->FnCore.pszFuncName = pszFunction;
1823	pInstr->FnCore.fDirty = kmk_cc_is_dirty_function(pszFunction);
1824
1825	/*
1826	* Parse the arguments. Plain arguments gets duplicated in the program
1827	* memory so that they are terminated and no extra processing is necessary
1828	* later on. ASSUMES that the function implementations do NOT change
1829	* argument memory.
1830	*/
1831	iArg = 0;
1832	for (;;)
1833	{
1834	/* Find the end of the argument. */
1835	char ch = '\0';
1836	int32_t cDepth = 0;
1837	uint32_t cchThisArg = 0;
1838	while (cchThisArg < cchArgs)
1839	{
1840	ch = pchArgs[cchThisArg];
1841	if (ch == chClose)
1842	{
1843	KMK_CC_ASSERT(cDepth > 0);
1844	if (cDepth > 0)
1845	cDepth--;
1846	}
1847	else if (ch == chOpen)
1848	cDepth++;
1849	else if (ch == ',' && cDepth == 0 && iArg + 1 < cActualArgs)
1850	break;
1851	cchThisArg++;
1852	}
1853
1854	/* Duplicate it. */
1855	pInstr->apszArgs[iArg++] = kmk_cc_block_strdup(ppBlockTail, pchArgs, cchThisArg);
1856	if (ch != ',')
1857	break;
1858	pchArgs += cchThisArg + 1;
1859	cchArgs -= cchThisArg + 1;
1860	}
1861
1862	KMK_CC_ASSERT(iArg == cActualArgs);
1863	pInstr->apszArgs[iArg] = NULL;
1864
1865	/*
1866	* Realign the allocator and take down the address of the next instruction.
1867	*/
1868	kmk_cc_block_realign(ppBlockTail);
1869	pInstr->FnCore.pNext = (PKMKCCEXPCORE)kmk_cc_block_get_next_ptr(*ppBlockTail);
1870	}
1871
1872
1873	/**
1874	* Emits a kKmkCcExpInstr_DynamicVariable.
1875	*
1876	* @returns 0 on success, non-zero on failure.
1877	* @param ppBlockTail Pointer to the allocator tail pointer.
1878	* @param pchNameExpr The name of the variable (ASSUMED presistent
1879	* thru-out the program life time).
1880	* @param cchNameExpr The length of the variable name. If zero,
1881	* nothing will be emitted.
1882	*/
1883	static int kmk_cc_exp_emit_dyn_variable(PKMKCCBLOCK ppBlockTail, const char pchNameExpr, uint32_t cchNameExpr)
1884	{
1885	PKMKCCEXPDYNVAR pInstr;
1886	int rc;
1887	KMK_CC_ASSERT(cchNameExpr > 0);
1888
1889	pInstr = (PKMKCCEXPDYNVAR)kmk_cc_block_alloc_exp(ppBlockTail, sizeof(*pInstr));
1890	pInstr->Core.enmOpcode = kKmkCcExpInstr_DynamicVariable;
1891
1892	rc = kmk_cc_exp_compile_subprog(ppBlockTail, pchNameExpr, cchNameExpr, &pInstr->Subprog);
1893
1894	pInstr->pNext = (PKMKCCEXPCORE)kmk_cc_block_get_next_ptr(*ppBlockTail);
1895	return rc;
1896	}
1897
1898
1899	/**
1900	* Emits either a kKmkCcExpInstr_PlainVariable or
1901	* kKmkCcExpInstr_SearchAndReplacePlainVariable instruction.
1902	*
1903	* @param ppBlockTail Pointer to the allocator tail pointer.
1904	* @param pchName The name of the variable. (Does not need to be
1905	* valid beyond the call.)
1906	* @param cchName The length of the variable name. If zero,
1907	* nothing will be emitted.
1908	*/
1909	static void kmk_cc_exp_emit_plain_variable_maybe_sr(PKMKCCBLOCK ppBlockTail, const char pchName, uint32_t cchName)
1910	{
1911	if (cchName > 0)
1912	{
1913	/*
1914	* Hopefully, we're not expected to do any search and replace on the
1915	* expanded variable string later... Requires both ':' and '='.
1916	*/
1917	const char *pchEqual;
1918	const char pchColon = (const char )memchr(pchName, ':', cchName);
1919	if ( pchColon == NULL
1920	\|\| (pchEqual = (const char *)memchr(pchColon + 1, ':', cchName - (pchColon - pchName - 1))) == NULL
1921	\|\| pchEqual == pchEqual + 1)
1922	{
1923	PKMKCCEXPPLAINVAR pInstr = (PKMKCCEXPPLAINVAR)kmk_cc_block_alloc_exp(ppBlockTail, sizeof(*pInstr));
1924	pInstr->Core.enmOpcode = kKmkCcExpInstr_PlainVariable;
1925	pInstr->pszName = strcache2_add(&variable_strcache, pchName, cchName);
1926	}
1927	else if (pchColon != pchName)
1928	{
1929	/*
1930	* Okay, we need to do search and replace the variable value.
1931	* This is performed by patsubst_expand_pat using '%' patterns.
1932	*/
1933	uint32_t cchName2 = (uint32_t)(pchColon - pchName);
1934	uint32_t cchSearch = (uint32_t)(pchEqual - pchColon - 1);
1935	uint32_t cchReplace = cchName - cchName2 - cchSearch - 2;
1936	const char *pchPct;
1937	char *psz;
1938	PKMKCCEXPSRPLAINVAR pInstr;
1939
1940	pInstr = (PKMKCCEXPSRPLAINVAR)kmk_cc_block_alloc_exp(ppBlockTail, sizeof(*pInstr));
1941	pInstr->Core.enmOpcode = kKmkCcExpInstr_SearchAndReplacePlainVariable;
1942	pInstr->pszName = strcache2_add(&variable_strcache, pchName, cchName2);
1943
1944	/* Figure out the search pattern, unquoting percent chars.. */
1945	psz = (char *)kmk_cc_block_byte_alloc(ppBlockTail, cchSearch + 2);
1946	psz[0] = '%';
1947	memcpy(psz + 1, pchColon + 1, cchSearch);
1948	psz[1 + cchSearch] = '\0';
1949	pchPct = find_percent(psz + 1); /* also performs unquoting */
1950	if (pchPct)
1951	{
1952	pInstr->pszSearchPattern = psz + 1;
1953	pInstr->offPctSearchPattern = (uint32_t)(pchPct - psz - 1);
1954	}
1955	else
1956	{
1957	pInstr->pszSearchPattern = psz;
1958	pInstr->offPctSearchPattern = 0;
1959	}
1960
1961	/* Figure out the replacement pattern, unquoting percent chars.. */
1962	if (cchReplace == 0)
1963	{
1964	pInstr->pszReplacePattern = "%";
1965	pInstr->offPctReplacePattern = 0;
1966	}
1967	else
1968	{
1969	psz = (char *)kmk_cc_block_byte_alloc(ppBlockTail, cchReplace + 2);
1970	psz[0] = '%';
1971	memcpy(psz + 1, pchEqual + 1, cchReplace);
1972	psz[1 + cchReplace] = '\0';
1973	pchPct = find_percent(psz + 1); /* also performs unquoting */
1974	if (pchPct)
1975	{
1976	pInstr->pszReplacePattern = psz + 1;
1977	pInstr->offPctReplacePattern = (uint32_t)(pchPct - psz - 1);
1978	}
1979	else
1980	{
1981	pInstr->pszReplacePattern = psz;
1982	pInstr->offPctReplacePattern = 0;
1983	}
1984	}
1985
1986	/* Note down where the next instruction is after realigning the allocator. */
1987	kmk_cc_block_realign(ppBlockTail);
1988	pInstr->pNext = (PKMKCCEXPCORE)kmk_cc_block_get_next_ptr(*ppBlockTail);
1989	}
1990	}
1991	}
1992
1993
1994	/**
1995	* Emits a kKmkCcExpInstr_CopyString.
1996	*
1997	* @param ppBlockTail Pointer to the allocator tail pointer.
1998	* @param pchStr The string to emit (ASSUMED presistent thru-out
1999	* the program life time).
2000	* @param cchStr The number of chars to copy. If zero, nothing
2001	* will be emitted.
2002	*/
2003	static void kmk_cc_exp_emit_copy_string(PKMKCCBLOCK ppBlockTail, const char pchStr, uint32_t cchStr)
2004	{
2005	if (cchStr > 0)
2006	{
2007	PKMKCCEXPCOPYSTRING pInstr = (PKMKCCEXPCOPYSTRING)kmk_cc_block_alloc_exp(ppBlockTail, sizeof(*pInstr));
2008	pInstr->Core.enmOpcode = kKmkCcExpInstr_CopyString;
2009	pInstr->cchCopy = cchStr;
2010	pInstr->pachSrc = pchStr;
2011	}
2012	}
2013
2014
2015	/**
2016	* String expansion compilation function common to both normal and sub programs.
2017	*
2018	* @returns 0 on success, non-zero on failure.
2019	* @param ppBlockTail Pointer to the allocator tail pointer.
2020	* @param pchStr The expression to compile.
2021	* @param cchStr The length of the expression to compile.
2022	*/
2023	static int kmk_cc_exp_compile_common(PKMKCCBLOCK ppBlockTail, const char pchStr, uint32_t cchStr)
2024	{
2025	/*
2026	* Process the string.
2027	*/
2028	while (cchStr > 0)
2029	{
2030	/* Look for dollar sign, marks variable expansion or dollar-escape. */
2031	int rc;
2032	const char *pchDollar = memchr(pchStr, '$', cchStr);
2033	if (pchDollar)
2034	{
2035	/*
2036	* Check for multiple dollar chars.
2037	*/
2038	uint32_t offDollar = (uint32_t)(pchDollar - pchStr);
2039	uint32_t cDollars = 1;
2040	while ( offDollar + cDollars < cchStr
2041	&& pchStr[offDollar + cDollars] == '$')
2042	cDollars++;
2043
2044	/*
2045	* Emit a string copy for any preceeding stuff, including half of
2046	* the dollars we found (dollar escape: $$ -> $).
2047	* (kmk_cc_exp_emit_copy_string ignore zero length strings).
2048	*/
2049	kmk_cc_exp_emit_copy_string(ppBlockTail, pchStr, offDollar + cDollars / 2);
2050	pchStr += offDollar + cDollars;
2051	cchStr -= offDollar + cDollars;
2052
2053	/*
2054	* Odd number of dollar chars means there is a variable to expand
2055	* or function to call.
2056	*/
2057	if (cDollars & 1)
2058	{
2059	if (cchStr > 0)
2060	{
2061	char const chOpen = *pchStr;
2062	if (chOpen == '(' \|\| chOpen == '{')
2063	{
2064	/* There are several alternative ways of finding the ending
2065	parenthesis / braces.
2066
2067	GNU make does one thing for functions and variable containing
2068	any '$' chars before the first closing char. While for
2069	variables where a closing char comes before any '$' char, a
2070	simplified approach is taken. This means that for example:
2071
2072	Given VAR=var, the expressions "$(var())" and
2073	"$($(VAR)())" would be expanded differently.
2074	In the first case the variable "var(" would be
2075	used and in the second "var()".
2076
2077	This code will not duplicate this weird behavior, but work
2078	the same regardless of whether there is a '$' char before
2079	the first closing char. */
2080	make_function_ptr_t pfnFunction;
2081	const char *pszFunction;
2082	unsigned char cMaxArgs;
2083	unsigned char cMinArgs;
2084	char fExpandArgs;
2085	char const chClose = chOpen == '(' ? ')' : '}';
2086	char ch = 0;
2087	uint32_t cchName = 0;
2088	uint32_t cDepth = 1;
2089	uint32_t cMaxDepth = 1;
2090	cDollars = 0;
2091
2092	pchStr++;
2093	cchStr--;
2094
2095	/* First loop: Identify potential function calls and dynamic expansion. */
2096	KMK_CC_ASSERT(!func_char_map[(unsigned char)chOpen]);
2097	KMK_CC_ASSERT(!func_char_map[(unsigned char)chClose]);
2098	KMK_CC_ASSERT(!func_char_map[(unsigned char)'$']);
2099	while (cchName < cchStr)
2100	{
2101	ch = pchStr[cchName];
2102	if (!func_char_map[(unsigned char)ch])
2103	break;
2104	cchName++;
2105	}
2106
2107	if ( cchName >= MIN_FUNCTION_LENGTH
2108	&& cchName <= MAX_FUNCTION_LENGTH
2109	&& (isblank(ch) \|\| ch == chClose \|\| cchName == cchStr)
2110	&& (pfnFunction = lookup_function_for_compiler(pchStr, cchName, &cMinArgs, &cMaxArgs,
2111	&fExpandArgs, &pszFunction)) != NULL)
2112	{
2113	/*
2114	* It's a function invocation, we should count parameters while
2115	* looking for the end.
2116	* Note! We use cchName for the length of the argument list.
2117	*/
2118	uint32_t cArgs = 1;
2119	if (ch != chClose)
2120	{
2121	/* Skip leading spaces before the first arg. */
2122	cchName++;
2123	while (cchName < cchStr && isblank((unsigned char)pchStr[cchName]))
2124	cchName++;
2125
2126	pchStr += cchName;
2127	cchStr -= cchName;
2128	cchName = 0;
2129
2130	while (cchName < cchStr)
2131	{
2132	ch = pchStr[cchName];
2133	if (ch == ',')
2134	{
2135	if (cDepth == 1)
2136	cArgs++;
2137	}
2138	else if (ch == chClose)
2139	{
2140	if (!--cDepth)
2141	break;
2142	}
2143	else if (ch == chOpen)
2144	{
2145	if (++cDepth > cMaxDepth)
2146	cMaxDepth = cDepth;
2147	}
2148	else if (ch == '$')
2149	cDollars++;
2150	cchName++;
2151	}
2152	}
2153	else
2154	{
2155	pchStr += cchName;
2156	cchStr -= cchName;
2157	cchName = 0;
2158	}
2159	if (cArgs < cMinArgs)
2160	{
2161	fatal(NULL, _("Function '%s' takes a minimum of %d arguments: %d given"),
2162	pszFunction, (int)cMinArgs, (int)cArgs);
2163	return -1; /* not reached */
2164	}
2165	if (cDepth != 0)
2166	{
2167	fatal(NULL, chOpen == '('
2168	? _("Missing closing parenthesis calling '%s'") : _("Missing closing braces calling '%s'"),
2169	pszFunction);
2170	return -1; /* not reached */
2171	}
2172	if (cMaxDepth > 16 && fExpandArgs)
2173	{
2174	fatal(NULL, _("Too many levels of nested function arguments expansions: %s"), pszFunction);
2175	return -1; /* not reached */
2176	}
2177	if (!fExpandArgs \|\| cDollars == 0)
2178	kmk_cc_exp_emit_plain_function(ppBlockTail, pszFunction, pchStr, cchName,
2179	cArgs, chOpen, chClose, pfnFunction, cMaxArgs);
2180	else
2181	{
2182	rc = kmk_cc_exp_emit_dyn_function(ppBlockTail, pszFunction, pchStr, cchName,
2183	cArgs, chOpen, chClose, pfnFunction, cMaxArgs);
2184	if (rc != 0)
2185	return rc;
2186	}
2187	}
2188	else
2189	{
2190	/*
2191	* Variable, find the end while checking whether anything needs expanding.
2192	*/
2193	if (ch == chClose)
2194	cDepth = 0;
2195	else if (cchName < cchStr)
2196	{
2197	if (ch != '$')
2198	{
2199	/* Second loop: Look for things that needs expanding. */
2200	while (cchName < cchStr)
2201	{
2202	ch = pchStr[cchName];
2203	if (ch == chClose)
2204	{
2205	if (!--cDepth)
2206	break;
2207	}
2208	else if (ch == chOpen)
2209	{
2210	if (++cDepth > cMaxDepth)
2211	cMaxDepth = cDepth;
2212	}
2213	else if (ch == '$')
2214	break;
2215	cchName++;
2216	}
2217	}
2218	if (ch == '$')
2219	{
2220	/* Third loop: Something needs expanding, just find the end. */
2221	cDollars = 1;
2222	cchName++;
2223	while (cchName < cchStr)
2224	{
2225	ch = pchStr[cchName];
2226	if (ch == chClose)
2227	{
2228	if (!--cDepth)
2229	break;
2230	}
2231	else if (ch == chOpen)
2232	{
2233	if (++cDepth > cMaxDepth)
2234	cMaxDepth = cDepth;
2235	}
2236	cchName++;
2237	}
2238	}
2239	}
2240	if (cDepth > 0) /* After warning, we just assume they're all there. */
2241	error(NULL, chOpen == '(' ? _("Missing closing parenthesis ") : _("Missing closing braces"));
2242	if (cMaxDepth >= 16)
2243	{
2244	fatal(NULL, _("Too many levels of nested variable expansions: '%.*s'"), (int)cchName + 2, pchStr - 1);
2245	return -1; /* not reached */
2246	}
2247	if (cDollars == 0)
2248	kmk_cc_exp_emit_plain_variable_maybe_sr(ppBlockTail, pchStr, cchName);
2249	else
2250	{
2251	rc = kmk_cc_exp_emit_dyn_variable(ppBlockTail, pchStr, cchName);
2252	if (rc != 0)
2253	return rc;
2254	}
2255	}
2256	pchStr += cchName + 1;
2257	cchStr -= cchName + (cDepth == 0);
2258	}
2259	else
2260	{
2261	/* Single character variable name. */
2262	kmk_cc_exp_emit_plain_variable_maybe_sr(ppBlockTail, pchStr, 1);
2263	pchStr++;
2264	cchStr--;
2265	}
2266	}
2267	else
2268	{
2269	error(NULL, _("Unexpected end of string after $"));
2270	break;
2271	}
2272	}
2273	}
2274	else
2275	{
2276	/*
2277	* Nothing more to expand, the remainder is a simple string copy.
2278	*/
2279	kmk_cc_exp_emit_copy_string(ppBlockTail, pchStr, cchStr);
2280	break;
2281	}
2282	}
2283
2284	/*
2285	* Emit final instruction.
2286	*/
2287	kmk_cc_exp_emit_return(ppBlockTail);
2288	return 0;
2289	}
2290
2291
2292	/**
2293	* Initializes string expansion program statistics.
2294	* @param pStats Pointer to the statistics structure to init.
2295	*/
2296	static void kmk_cc_exp_stats_init(PKMKCCEXPSTATS pStats)
2297	{
2298	pStats->cchAvg = 0;
2299	}
2300
2301
2302	/**
2303	* Compiles a string expansion subprogram.
2304	*
2305	* The caller typically make a call to kmk_cc_block_get_next_ptr after this
2306	* function returns to figure out where to continue executing.
2307	*
2308	* @returns 0 on success, non-zero on failure.
2309	* @param ppBlockTail Pointer to the allocator tail pointer.
2310	* @param pchStr Pointer to the string to compile an expansion
2311	* program for (ASSUMED to be valid for the
2312	* lifetime of the program).
2313	* @param cchStr The length of the string to compile. Expected to
2314	* be at least on char long.
2315	* @param pSubprog The subprogram structure to initialize.
2316	*/
2317	static int kmk_cc_exp_compile_subprog(PKMKCCBLOCK ppBlockTail, const char pchStr, uint32_t cchStr, PKMKCCEXPSUBPROG pSubprog)
2318	{
2319	KMK_CC_ASSERT(cchStr > 0);
2320	pSubprog->pFirstInstr = (PKMKCCEXPCORE)kmk_cc_block_get_next_ptr(*ppBlockTail);
2321	kmk_cc_exp_stats_init(&pSubprog->Stats);
2322	return kmk_cc_exp_compile_common(ppBlockTail, pchStr, cchStr);
2323	}
2324
2325
2326	/**
2327	* Compiles a string expansion program.
2328	*
2329	* @returns Pointer to the program on success, NULL on failure.
2330	* @param pchStr Pointer to the string to compile an expansion
2331	* program for (ASSUMED to be valid for the
2332	* lifetime of the program).
2333	* @param cchStr The length of the string to compile. Expected to
2334	* be at least on char long.
2335	*/
2336	static PKMKCCEXPPROG kmk_cc_exp_compile(const char *pchStr, uint32_t cchStr)
2337	{
2338	/*
2339	* Estimate block size, allocate one and initialize it.
2340	*/
2341	PKMKCCEXPPROG pProg;
2342	PKMKCCBLOCK pBlock;
2343	pProg = kmk_cc_block_alloc_first(&pBlock, sizeof(*pProg),
2344	(kmk_cc_count_dollars(pchStr, cchStr) + 4) * 8);
2345	if (pProg)
2346	{
2347	pProg->pBlockTail = pBlock;
2348	pProg->pFirstInstr = (PKMKCCEXPCORE)kmk_cc_block_get_next_ptr(pBlock);
2349	kmk_cc_exp_stats_init(&pProg->Stats);
2350	pProg->cRefs = 1;
2351	#ifdef KMK_CC_STRICT
2352	pProg->uInputHash = kmk_cc_debug_string_hash_n(0, pchStr, cchStr);
2353	#endif
2354
2355	/*
2356	* Join forces with the subprogram compilation code.
2357	*/
2358	if (kmk_cc_exp_compile_common(&pProg->pBlockTail, pchStr, cchStr) == 0)
2359	{
2360	#ifdef KMK_CC_WITH_STATS
2361	pBlock = pProg->pBlockTail;
2362	if (!pBlock->pNext)
2363	g_cSingleBlockExpProgs++;
2364	else if (!pBlock->pNext->pNext)
2365	g_cTwoBlockExpProgs++;
2366	else
2367	g_cMultiBlockExpProgs++;
2368	for (; pBlock; pBlock = pBlock->pNext)
2369	{
2370	g_cBlocksAllocatedExpProgs++;
2371	g_cbAllocatedExpProgs += pBlock->cbBlock;
2372	g_cbUnusedMemExpProgs += pBlock->cbBlock - pBlock->offNext;
2373	}
2374	#endif
2375	return pProg;
2376	}
2377	kmk_cc_block_free_list(pProg->pBlockTail);
2378	}
2379	return NULL;
2380	}
2381
2382
2383	/**
2384	* Updates the recursive_without_dollar member of a variable structure.
2385	*
2386	* This avoid compiling string expansion programs without only a CopyString
2387	* instruction. By setting recursive_without_dollar to 1, code calling
2388	* kmk_cc_compile_variable_for_expand and kmk_exec_expand_to_var_buf will
2389	* instead treat start treating it as a simple variable, which is faster.
2390	*
2391	* @returns The updated recursive_without_dollar value.
2392	* @param pVar Pointer to the variable.
2393	*/
2394	static int kmk_cc_update_variable_recursive_without_dollar(struct variable *pVar)
2395	{
2396	int fValue;
2397	KMK_CC_ASSERT(pVar->recursive_without_dollar == 0);
2398
2399	if (memchr(pVar->value, '$', pVar->value_length))
2400	fValue = -1;
2401	else
2402	fValue = 1;
2403	pVar->recursive_without_dollar = fValue;
2404
2405	return fValue;
2406	}
2407
2408
2409	/**
2410	* Compiles a variable for string expansion.
2411	*
2412	* @returns Pointer to the string expansion program on success, NULL if no
2413	* program was created.
2414	* @param pVar Pointer to the variable.
2415	*/
2416	struct kmk_cc_expandprog kmk_cc_compile_variable_for_expand(struct variable pVar)
2417	{
2418	KMK_CC_ASSERT(strlen(pVar->value) == pVar->value_length);
2419	KMK_CC_ASSERT(!pVar->expandprog);
2420	KMK_CC_ASSERT(pVar->recursive_without_dollar <= 0);
2421
2422	if ( !pVar->expandprog
2423	&& pVar->recursive)
2424	{
2425	if ( pVar->recursive_without_dollar < 0
2426	\|\| ( pVar->recursive_without_dollar == 0
2427	&& kmk_cc_update_variable_recursive_without_dollar(pVar) < 0) )
2428	{
2429	pVar->expandprog = kmk_cc_exp_compile(pVar->value, pVar->value_length);
2430	g_cVarForExpandCompilations++;
2431	}
2432	}
2433	return pVar->expandprog;
2434	}
2435
2436
2437	/**
2438	* String expansion execution worker for outputting a variable.
2439	*
2440	* @returns The new variable buffer position.
2441	* @param pVar The variable to reference.
2442	* @param pchDst The current variable buffer position.
2443	*/
2444	static char kmk_exec_expand_worker_reference_variable(struct variable pVar, char *pchDst)
2445	{
2446	if (pVar->value_length > 0)
2447	{
2448	if (!pVar->recursive \|\| IS_VARIABLE_RECURSIVE_WITHOUT_DOLLAR(pVar))
2449	pchDst = variable_buffer_output(pchDst, pVar->value, pVar->value_length);
2450	else
2451	pchDst = reference_recursive_variable(pchDst, pVar);
2452	}
2453	else if (pVar->append)
2454	pchDst = reference_recursive_variable(pchDst, pVar);
2455	return pchDst;
2456	}
2457
2458
2459	/**
2460	* Executes a stream string expansion instructions, outputting to the current
2461	* varaible buffer.
2462	*
2463	* @returns The new variable buffer position.
2464	* @param pInstrCore The instruction to start executing at.
2465	* @param pchDst The current variable buffer position.
2466	*/
2467	static char kmk_exec_expand_instruction_stream_to_var_buf(PKMKCCEXPCORE pInstrCore, char pchDst)
2468	{
2469	for (;;)
2470	{
2471	switch (pInstrCore->enmOpcode)
2472	{
2473	case kKmkCcExpInstr_CopyString:
2474	{
2475	PKMKCCEXPCOPYSTRING pInstr = (PKMKCCEXPCOPYSTRING)pInstrCore;
2476	pchDst = variable_buffer_output(pchDst, pInstr->pachSrc, pInstr->cchCopy);
2477
2478	pInstrCore = &(pInstr + 1)->Core;
2479	break;
2480	}
2481
2482	case kKmkCcExpInstr_PlainVariable:
2483	{
2484	PKMKCCEXPPLAINVAR pInstr = (PKMKCCEXPPLAINVAR)pInstrCore;
2485	struct variable *pVar = lookup_variable_strcached(pInstr->pszName);
2486	if (pVar)
2487	pchDst = kmk_exec_expand_worker_reference_variable(pVar, pchDst);
2488	else
2489	warn_undefined(pInstr->pszName, strcache2_get_len(&variable_strcache, pInstr->pszName));
2490
2491	pInstrCore = &(pInstr + 1)->Core;
2492	break;
2493	}
2494
2495	case kKmkCcExpInstr_DynamicVariable:
2496	{
2497	PKMKCCEXPDYNVAR pInstr = (PKMKCCEXPDYNVAR)pInstrCore;
2498	struct variable *pVar;
2499	uint32_t cchName;
2500	char *pszName = kmk_exec_expand_subprog_to_tmp(&pInstr->Subprog, &cchName);
2501	char pszColon = (char )memchr(pszName, ':', cchName);
2502	char *pszEqual;
2503	if ( pszColon == NULL
2504	\|\| (pszEqual = (char *)memchr(pszColon + 1, '=', &pszName[cchName] - pszColon - 1)) == NULL
2505	\|\| pszEqual == pszColon + 1)
2506	{
2507	pVar = lookup_variable(pszName, cchName);
2508	if (pVar)
2509	pchDst = kmk_exec_expand_worker_reference_variable(pVar, pchDst);
2510	else
2511	warn_undefined(pszName, cchName);
2512	}
2513	else if (pszColon != pszName)
2514	{
2515	/*
2516	* Oh, we have to do search and replace. How tedious.
2517	* Since the variable name is a temporary buffer, we can transform
2518	* the strings into proper search and replacement patterns directly.
2519	*/
2520	pVar = lookup_variable(pszName, pszColon - pszName);
2521	if (pVar)
2522	{
2523	char const *pszExpandedVarValue = pVar->recursive ? recursively_expand(pVar) : pVar->value;
2524	char *pszSearchPat = pszColon + 1;
2525	char *pszReplacePat = pszEqual + 1;
2526	const char *pchPctSearchPat;
2527	const char *pchPctReplacePat;
2528
2529	*pszEqual = '\0';
2530	pchPctSearchPat = find_percent(pszSearchPat);
2531	pchPctReplacePat = find_percent(pszReplacePat);
2532
2533	if (!pchPctReplacePat)
2534	{
2535	if (pszReplacePat[-2] != '\0') /* On the offchance that a pct was unquoted by find_percent. */
2536	{
2537	memmove(pszName + 1, pszSearchPat, pszReplacePat - pszSearchPat);
2538	if (pchPctSearchPat)
2539	pchPctSearchPat -= pszSearchPat - &pszName[1];
2540	pszSearchPat = &pszName[1];
2541	}
2542	pchPctReplacePat = --pszReplacePat;
2543	*pszReplacePat = '%';
2544	}
2545
2546	if (!pchPctSearchPat)
2547	{
2548	pchPctSearchPat = --pszSearchPat;
2549	*pszSearchPat = '%';
2550	}
2551
2552	pchDst = patsubst_expand_pat(pchDst, pszExpandedVarValue,
2553	pszSearchPat, pszReplacePat,
2554	pchPctSearchPat, pchPctReplacePat);
2555
2556	if (pVar->recursive)
2557	free((void *)pszExpandedVarValue);
2558	}
2559	else
2560	warn_undefined(pszName, pszColon - pszName);
2561	}
2562	free(pszName);
2563
2564	pInstrCore = pInstr->pNext;
2565	break;
2566	}
2567
2568
2569	case kKmkCcExpInstr_SearchAndReplacePlainVariable:
2570	{
2571	PKMKCCEXPSRPLAINVAR pInstr = (PKMKCCEXPSRPLAINVAR)pInstrCore;
2572	struct variable *pVar = lookup_variable_strcached(pInstr->pszName);
2573	if (pVar)
2574	{
2575	char const *pszExpandedVarValue = pVar->recursive ? recursively_expand(pVar) : pVar->value;
2576	pchDst = patsubst_expand_pat(pchDst,
2577	pszExpandedVarValue,
2578	pInstr->pszSearchPattern,
2579	pInstr->pszReplacePattern,
2580	&pInstr->pszSearchPattern[pInstr->offPctSearchPattern],
2581	&pInstr->pszReplacePattern[pInstr->offPctReplacePattern]);
2582	if (pVar->recursive)
2583	free((void *)pszExpandedVarValue);
2584	}
2585	else
2586	warn_undefined(pInstr->pszName, strcache2_get_len(&variable_strcache, pInstr->pszName));
2587
2588	pInstrCore = pInstr->pNext;
2589	break;
2590	}
2591
2592	case kKmkCcExpInstr_PlainFunction:
2593	{
2594	PKMKCCEXPPLAINFUNC pInstr = (PKMKCCEXPPLAINFUNC)pInstrCore;
2595	uint32_t iArg;
2596	if (!pInstr->FnCore.fDirty)
2597	{
2598	#ifdef KMK_CC_STRICT
2599	uint32_t uCrcBefore = 0;
2600	uint32_t uCrcAfter = 0;
2601	iArg = pInstr->FnCore.cArgs;
2602	while (iArg-- > 0)
2603	uCrcBefore = kmk_cc_debug_string_hash(uCrcBefore, pInstr->apszArgs[iArg]);
2604	#endif
2605
2606	pchDst = pInstr->FnCore.pfnFunction(pchDst, (char **)&pInstr->apszArgs[0], pInstr->FnCore.pszFuncName);
2607
2608	#ifdef KMK_CC_STRICT
2609	iArg = pInstr->FnCore.cArgs;
2610	while (iArg-- > 0)
2611	uCrcAfter = kmk_cc_debug_string_hash(uCrcAfter, pInstr->apszArgs[iArg]);
2612	KMK_CC_ASSERT(uCrcBefore == uCrcAfter);
2613	#endif
2614	}
2615	else
2616	{
2617	char *papszShadowArgs = xmalloc((pInstr->FnCore.cArgs 2 + 1) * sizeof(papszShadowArgs[0]));
2618	char **papszArgs = &papszShadowArgs[pInstr->FnCore.cArgs];
2619
2620	iArg = pInstr->FnCore.cArgs;
2621	papszArgs[iArg] = NULL;
2622	while (iArg-- > 0)
2623	papszArgs[iArg] = papszShadowArgs[iArg] = xstrdup(pInstr->apszArgs[iArg]);
2624
2625	pchDst = pInstr->FnCore.pfnFunction(pchDst, (char **)&pInstr->apszArgs[0], pInstr->FnCore.pszFuncName);
2626
2627	iArg = pInstr->FnCore.cArgs;
2628	while (iArg-- > 0)
2629	free(papszShadowArgs[iArg]);
2630	free(papszShadowArgs);
2631	}
2632
2633	pInstrCore = pInstr->FnCore.pNext;
2634	break;
2635	}
2636
2637	case kKmkCcExpInstr_DynamicFunction:
2638	{
2639	PKMKCCEXPDYNFUNC pInstr = (PKMKCCEXPDYNFUNC)pInstrCore;
2640	char *papszArgsShadow = xmalloc( (pInstr->FnCore.cArgs 2 + 1) * sizeof(char *));
2641	char **papszArgs = &papszArgsShadow[pInstr->FnCore.cArgs];
2642	uint32_t iArg;
2643
2644	if (!pInstr->FnCore.fDirty)
2645	{
2646	#ifdef KMK_CC_STRICT
2647	uint32_t uCrcBefore = 0;
2648	uint32_t uCrcAfter = 0;
2649	#endif
2650	iArg = pInstr->FnCore.cArgs;
2651	papszArgs[iArg] = NULL;
2652	while (iArg-- > 0)
2653	{
2654	char *pszArg;
2655	if (pInstr->aArgs[iArg].fSubprog)
2656	pszArg = kmk_exec_expand_subprog_to_tmp(&pInstr->aArgs[iArg].u.Subprog, NULL);
2657	else
2658	pszArg = (char *)pInstr->aArgs[iArg].u.Plain.psz;
2659	papszArgsShadow[iArg] = pszArg;
2660	papszArgs[iArg] = pszArg;
2661	#ifdef KMK_CC_STRICT
2662	uCrcBefore = kmk_cc_debug_string_hash(uCrcBefore, pszArg);
2663	#endif
2664	}
2665	pchDst = pInstr->FnCore.pfnFunction(pchDst, papszArgs, pInstr->FnCore.pszFuncName);
2666
2667	iArg = pInstr->FnCore.cArgs;
2668	while (iArg-- > 0)
2669	{
2670	#ifdef KMK_CC_STRICT
2671	KMK_CC_ASSERT(papszArgsShadow[iArg] == papszArgs[iArg]);
2672	uCrcAfter = kmk_cc_debug_string_hash(uCrcAfter, papszArgsShadow[iArg]);
2673	#endif
2674	if (pInstr->aArgs[iArg].fSubprog)
2675	free(papszArgsShadow[iArg]);
2676	}
2677	KMK_CC_ASSERT(uCrcBefore == uCrcAfter);
2678	}
2679	else
2680	{
2681	iArg = pInstr->FnCore.cArgs;
2682	papszArgs[iArg] = NULL;
2683	while (iArg-- > 0)
2684	{
2685	char *pszArg;
2686	if (pInstr->aArgs[iArg].fSubprog)
2687	pszArg = kmk_exec_expand_subprog_to_tmp(&pInstr->aArgs[iArg].u.Subprog, NULL);
2688	else
2689	pszArg = xstrdup(pInstr->aArgs[iArg].u.Plain.psz);
2690	papszArgsShadow[iArg] = pszArg;
2691	papszArgs[iArg] = pszArg;
2692	}
2693
2694	pchDst = pInstr->FnCore.pfnFunction(pchDst, papszArgs, pInstr->FnCore.pszFuncName);
2695
2696	iArg = pInstr->FnCore.cArgs;
2697	while (iArg-- > 0)
2698	free(papszArgsShadow[iArg]);
2699	}
2700	free(papszArgsShadow);
2701
2702	pInstrCore = pInstr->FnCore.pNext;
2703	break;
2704	}
2705
2706	case kKmkCcExpInstr_Jump:
2707	{
2708	PKMKCCEXPJUMP pInstr = (PKMKCCEXPJUMP)pInstrCore;
2709	pInstrCore = pInstr->pNext;
2710	break;
2711	}
2712
2713	case kKmkCcExpInstr_Return:
2714	return pchDst;
2715
2716	default:
2717	fatal(NULL, _("Unknown string expansion opcode: %d (%#x)"),
2718	(int)pInstrCore->enmOpcode, (int)pInstrCore->enmOpcode);
2719	return NULL;
2720	}
2721	}
2722	}
2723
2724
2725	/**
2726	* Updates the string expansion statistics.
2727	*
2728	* @param pStats The statistics structure to update.
2729	* @param cchResult The result lenght.
2730	*/
2731	void kmk_cc_exp_stats_update(PKMKCCEXPSTATS pStats, uint32_t cchResult)
2732	{
2733	/*
2734	* The average is simplified and not an exact average for every
2735	* expansion that has taken place.
2736	*/
2737	pStats->cchAvg = (pStats->cchAvg * 7 + cchResult) / 8;
2738	}
2739
2740
2741	/**
2742	* Execute a string expansion subprogram, outputting to a new heap buffer.
2743	*
2744	* @returns Pointer to the output buffer (hand to free when done).
2745	* @param pSubprog The subprogram to execute.
2746	* @param pcchResult Where to return the size of the result. Optional.
2747	*/
2748	static char kmk_exec_expand_subprog_to_tmp(PKMKCCEXPSUBPROG pSubprog, uint32_t pcchResult)
2749	{
2750	char *pchOldVarBuf;
2751	unsigned int cbOldVarBuf;
2752	char *pchDst;
2753	char *pszResult;
2754	uint32_t cchResult;
2755
2756	/*
2757	* Temporarily replace the variable buffer while executing the instruction
2758	* stream for this subprogram.
2759	*/
2760	pchDst = install_variable_buffer_with_hint(&pchOldVarBuf, &cbOldVarBuf,
2761	pSubprog->Stats.cchAvg ? pSubprog->Stats.cchAvg + 32 : 256);
2762
2763	pchDst = kmk_exec_expand_instruction_stream_to_var_buf(pSubprog->pFirstInstr, pchDst);
2764
2765	/* Ensure that it's terminated. */
2766	pchDst = variable_buffer_output(pchDst, "\0", 1) - 1;
2767
2768	/* Grab the result buffer before restoring the previous one. */
2769	pszResult = variable_buffer;
2770	cchResult = (uint32_t)(pchDst - pszResult);
2771	if (pcchResult)
2772	*pcchResult = cchResult;
2773	kmk_cc_exp_stats_update(&pSubprog->Stats, cchResult);
2774
2775	variable_buffer = pchOldVarBuf;
2776	variable_buffer_length = cbOldVarBuf;
2777
2778	return pszResult;
2779	}
2780
2781
2782	/**
2783	* Execute a string expansion program, outputting to the current variable
2784	* buffer.
2785	*
2786	* @returns New variable buffer position.
2787	* @param pProg The program to execute.
2788	* @param pchDst The current varaible buffer position.
2789	*/
2790	static char kmk_exec_expand_prog_to_var_buf(PKMKCCEXPPROG pProg, char pchDst)
2791	{
2792	uint32_t cchResult;
2793	uint32_t offStart = (uint32_t)(pchDst - variable_buffer);
2794
2795	if (pProg->Stats.cchAvg >= variable_buffer_length - offStart)
2796	pchDst = ensure_variable_buffer_space(pchDst, offStart + pProg->Stats.cchAvg + 32);
2797
2798	KMK_CC_ASSERT(pProg->cRefs > 0);
2799	pProg->cRefs++;
2800
2801	pchDst = kmk_exec_expand_instruction_stream_to_var_buf(pProg->pFirstInstr, pchDst);
2802
2803	pProg->cRefs--;
2804	KMK_CC_ASSERT(pProg->cRefs > 0);
2805
2806	cchResult = (uint32_t)(pchDst - variable_buffer);
2807	KMK_CC_ASSERT(cchResult >= offStart);
2808	cchResult -= offStart;
2809	kmk_cc_exp_stats_update(&pProg->Stats, cchResult);
2810	g_cVarForExpandExecs++;
2811
2812	return pchDst;
2813	}
2814
2815
2816	/**
2817	* Expands a variable into a variable buffer using its expandprog.
2818	*
2819	* @returns The new variable buffer position.
2820	* @param pVar Pointer to the variable. Must have a program.
2821	* @param pchDst Pointer to the current variable buffer position.
2822	*/
2823	char kmk_exec_expand_to_var_buf(struct variable pVar, char *pchDst)
2824	{
2825	KMK_CC_ASSERT(pVar->expandprog);
2826	KMK_CC_ASSERT(pVar->expandprog->uInputHash == kmk_cc_debug_string_hash(0, pVar->value));
2827	return kmk_exec_expand_prog_to_var_buf(pVar->expandprog, pchDst);
2828	}
2829
2830
2831
2832
2833
2834	/*
2835	*
2836	* Makefile evaluation programs.
2837	* Makefile evaluation programs.
2838	* Makefile evaluation programs.
2839	*
2840	*/
2841
2842	static size_t kmk_cc_eval_detect_eol_style(char pchFirst, char pchSecond, const char *pszContent, size_t cchContent)
2843	{
2844	/* Look for LF first. */
2845	const char pszTmp = (const char )memchr(pszContent, '\n', cchContent);
2846	if (pszTmp)
2847	{
2848	/* CRLF? */
2849	if (pszTmp != pszContent && pszTmp[-1] == '\r')
2850	{
2851	*pchFirst = '\r';
2852	*pchSecond = '\n';
2853	return 2;
2854	}
2855
2856	/* No, LF or LFCR. (pszContent is zero terminated, so no bounds checking necessary.) */
2857	*pchFirst = '\n';
2858	if (pszTmp[1] != '\r')
2859	{
2860	*pchSecond = 0;
2861	return 1;
2862	}
2863	*pchSecond = '\r';
2864	return 2;
2865	}
2866
2867	/* Probably no EOLs here. */
2868	if (memchr(pszContent, '\r', cchContent) == NULL)
2869	{
2870	pchSecond = pchFirst = 0;
2871	return 0;
2872	}
2873
2874	/* kind of unlikely */
2875	*pchFirst = '\r';
2876	*pchSecond = 0;
2877	return 1;
2878	}
2879
2880
2881	#if 0
2882	/**
2883	* Checks whether we've got an EOL escape sequence or not.
2884	*
2885	* @returns non-zero if escaped EOL, 0 if not (i.e. actual EOL).
2886	* @param pszContent The string pointer @a offEol is relative to.
2887	* @param offEol The offset of the first EOL char.
2888	*/
2889	static unsigned kmk_cc_eval_is_eol_escape_seq(const char *pszContent, size_t offEol)
2890	{
2891	/* The caller has already checked out two backslashes. */
2892	size_t offFirstBackslash = offEol;
2893	KMK_CC_ASSERT(offFirstBackslash >= 2);
2894	offFirstBackslash -= 2;
2895
2896	/* Find the first backslash. */
2897	while (offFirstBackslash > 0 && pszContent[offFirstBackslash - 1] == '\\')
2898	offFirstBackslash--;
2899
2900	/* Odd number -> escaped EOL; Even number -> real EOL; */
2901	return (offEol - offFirstBackslash) & 1;
2902	}
2903	#endif
2904
2905
2906
2907	typedef enum kmk_cc_eval_token
2908	{
2909	/** Invalid token . */
2910	kKmkCcEvalToken_Invalid = 0,
2911
2912	/** Assignment: '=' */
2913	kKmkCcEvalToken_AssignRecursive,
2914	/** Assignment: ':=' */
2915	kKmkCcEvalToken_AssignSimple,
2916	/** Assignment: '+=' */
2917	kKmkCcEvalToken_AssignAppend,
2918	/** Assignment: '<=' */
2919	kKmkCcEvalToken_AssignPrepend,
2920	/** Assignment: '?=' */
2921	kKmkCcEvalToken_AssignIfNew,
2922	/** Assignment: 'define' */
2923	kKmkCcEvalToken_define,
2924	/** Unassignment: 'undefine' */
2925	kKmkCcEvalToken_undefine,
2926
2927	/* Assignment modifier: 'local' */
2928	kKmkCcEvalToken_local,
2929	/* Assignment modifier: 'override' */
2930	kKmkCcEvalToken_override,
2931	/* Assignment modifier: 'private' (target variable not inh by deps) */
2932	kKmkCcEvalToken_private,
2933	/* Assignment modifier / other variable thing: 'export' */
2934	kKmkCcEvalToken_export,
2935	/* Other variable thing: 'unexport' */
2936	kKmkCcEvalToken_unexport,
2937
2938	kKmkCcEvalToken_ifdef,
2939	kKmkCcEvalToken_ifndef,
2940	kKmkCcEvalToken_ifeq,
2941	kKmkCcEvalToken_ifneq,
2942	kKmkCcEvalToken_if1of,
2943	kKmkCcEvalToken_ifn1of,
2944	kKmkCcEvalToken_if,
2945	kKmkCcEvalToken_else,
2946	kKmkCcEvalToken_endif,
2947
2948	kKmkCcEvalToken_include,
2949	kKmkCcEvalToken_include_silent,
2950	kKmkCcEvalToken_includedep,
2951	kKmkCcEvalToken_includedep_queue,
2952	kKmkCcEvalToken_includedep_flush,
2953
2954	kKmkCcEvalToken_colon,
2955	kKmkCcEvalToken_double_colon,
2956	kKmkCcEvalToken_plus,
2957	kKmkCcEvalToken_plus_maybe,
2958
2959	kKmkCcEvalToken_vpath,
2960
2961	/** Plain word. */
2962	kKmkCcEvalToken_WordPlain,
2963	/** Word that maybe in need of expanding. */
2964	kKmkCcEvalToken_WordWithDollar,
2965
2966	kKmkCcEvalToken_End
2967	} KMKCCEVALTOKEN;
2968
2969	/**
2970	* A tokenized word.
2971	*/
2972	typedef struct kmk_cc_eval_word
2973	{
2974	/** The token word (lexeme). */
2975	const char *pchWord;
2976	/** The length of the word (lexeme). */
2977	uint32_t cchWord;
2978	/** The token classification. */
2979	KMKCCEVALTOKEN enmToken;
2980	} KMKCCEVALWORD;
2981	typedef KMKCCEVALWORD *PKMKCCEVALWORD;
2982	typedef KMKCCEVALWORD const *PCKMKCCEVALWORD;
2983
2984
2985	/**
2986	* Escaped end-of-line sequence in the current line.
2987	*/
2988	typedef struct KMKCCEVALESCEOL
2989	{
2990	/** Offset at which the EOL escape sequence starts for a non-command line. */
2991	size_t offEsc;
2992	/** Offset of the newline sequence. */
2993	size_t offEol;
2994	} KMKCCEVALESCEOL;
2995	typedef KMKCCEVALESCEOL *PKMKCCEVALESCEOL;
2996
2997
2998	/**
2999	* String copy segment.
3000	*/
3001	typedef struct KMKCCEVALSTRCPYSEG
3002	{
3003	/** The start. */
3004	const char *pchSrc;
3005	/** The number of chars to copy and whether to prepend space.
3006	* Negative values indicates that we should prepend a space. */
3007	ssize_t cchSrcAndPrependSpace;
3008	} KMKCCEVALSTRCPYSEG;
3009	typedef KMKCCEVALSTRCPYSEG *PKMKCCEVALSTRCPYSEG;
3010	typedef KMKCCEVALSTRCPYSEG const *PCKMKCCEVALSTRCPYSEG;
3011
3012
3013	typedef struct KMKCCEVALCOMPILER
3014	{
3015	/** Pointer to the KMKCCEVALPROG::pBlockTail member. */
3016	PKMKCCBLOCK *ppBlockTail;
3017
3018	/** @name Line parsing state.
3019	* @{ */
3020	/** Offset of newline escape sequences in the current line.
3021	* This is only applicable if cEscEols is not zero. */
3022	PKMKCCEVALESCEOL paEscEols;
3023	/** The number of number of paEscEols entries we've allocated. */
3024	unsigned cEscEolsAllocated;
3025	/** Number of escaped EOLs (line count - 1). */
3026	unsigned cEscEols;
3027	/** The paEscEols entry corresponding to the current parsing location.
3028	* Still to be seen how accurate this can be made to be. */
3029	unsigned iEscEol;
3030
3031	/** The current line number (for error handling / debugging). */
3032	unsigned iLine;
3033	/** The start offset of the current line. */
3034	size_t offLine;
3035	/** Length of the current line, sans the final EOL and comments. */
3036	size_t cchLine;
3037	/** Length of the current line, sans the final EOL but with comments. */
3038	size_t cchLineWithComments;
3039
3040	/** The first char in an EOL sequence.
3041	* We ASSUMES that this char won't appear in any other sequence in the file,
3042	* thus skipping matching any subsequent chars. */
3043	char chFirstEol;
3044	/** The second char in an EOL sequence, if applicable. */
3045	char chSecondEol;
3046
3047	/** The length of the EOL sequence. */
3048	size_t cchEolSeq;
3049	/** The minimum length of an esacped EOL sequence (cchEolSeq + 1). */
3050	size_t cchEscEolSeq;
3051
3052	/** String copy segments. */
3053	PKMKCCEVALSTRCPYSEG paStrCopySegs;
3054	/** The number of segments that has been prepared. */
3055	unsigned cStrCopySegs;
3056	/** The number of segments we've allocated. */
3057	unsigned cStrCopySegsAllocated;
3058	/** @} */
3059
3060
3061	/** @name Recipe state.
3062	* @{ */
3063	/** Set if we're working on a recipe. */
3064	PKMKCCEVALRECIPE pRecipe;
3065	/** Set for ignoring recipes without targets (Sun OS 4 Make). */
3066	uint8_t fNoTargetRecipe;
3067	/** The command prefix character. */
3068	char chCmdPrefix;
3069	/** @} */
3070
3071	/** @name Tokenzied words.
3072	* @{ */
3073	uint32_t cWords;
3074	uint32_t cWordsAllocated;
3075	PKMKCCEVALWORD paWords;
3076	/** @} */
3077
3078	/** @name Conditionals.
3079	* @{ */
3080	/** Current conditional stack depth. */
3081	unsigned cIfs;
3082	/** The conditional directive stack. */
3083	PKMKCCEVALIFCORE apIfs[KMK_CC_EVAL_MAX_IF_DEPTH];
3084	/** @} */
3085
3086	/** The program being compiled. */
3087	PKMKCCEVALPROG pEvalProg;
3088	/** Pointer to the content. */
3089	const char *pszContent;
3090	/** The amount of input to parse. */
3091	size_t cchContent;
3092	} KMKCCEVALCOMPILER;
3093	typedef KMKCCEVALCOMPILER *PKMKCCEVALCOMPILER;
3094
3095
3096	static void kmk_cc_eval_init_compiler(PKMKCCEVALCOMPILER pCompiler, PKMKCCEVALPROG pEvalProg, unsigned iLine,
3097	const char *pszContent, size_t cchContent)
3098	{
3099	pCompiler->ppBlockTail = &pEvalProg->pBlockTail;
3100
3101	pCompiler->pRecipe = NULL;
3102	pCompiler->fNoTargetRecipe = 0;
3103	pCompiler->chCmdPrefix = cmd_prefix;
3104
3105	pCompiler->cWordsAllocated = 0;
3106	pCompiler->paWords = NULL;
3107
3108	pCompiler->cEscEolsAllocated = 0;
3109	pCompiler->paEscEols = NULL;
3110	pCompiler->iLine = iLine;
3111
3112	pCompiler->cStrCopySegsAllocated = 0;
3113	pCompiler->paStrCopySegs = NULL;
3114
3115	pCompiler->cIfs = 0;
3116
3117	pCompiler->pEvalProg = pEvalProg;
3118	pCompiler->pszContent = pszContent;
3119	pCompiler->cchContent = cchContent;
3120
3121	/* Detect EOL style. */
3122	pCompiler->cchEolSeq = kmk_cc_eval_detect_eol_style(&pCompiler->chFirstEol, &pCompiler->chSecondEol,
3123	pszContent, cchContent);
3124	pCompiler->cchEscEolSeq = 1 + pCompiler->cchEolSeq;
3125	}
3126
3127
3128	static void kmk_cc_eval_delete_compiler(PKMKCCEVALCOMPILER pCompiler)
3129	{
3130	if (pCompiler->paWords)
3131	free(pCompiler->paWords);
3132	if (pCompiler->paEscEols)
3133	free(pCompiler->paEscEols);
3134	}
3135
3136	static void KMK_CC_FN_NO_RETURN kmk_cc_eval_fatal(PKMKCCEVALCOMPILER pCompiler, const char pchWhere, const char pszMsg, ...)
3137	{
3138	va_list va;
3139	unsigned iLine = pCompiler->iLine;
3140
3141	log_working_directory(1);
3142
3143	/*
3144	* If we have a pointer location, use it to figure out the exact line and column.
3145	*/
3146	if (pchWhere)
3147	{
3148	size_t offLine = pCompiler->offLine;
3149	size_t off = pchWhere - pCompiler->pszContent;
3150	unsigned i = 0;
3151	while ( i < pCompiler->cEscEols
3152	&& off > pCompiler->paEscEols[i].offEol)
3153	{
3154	offLine = pCompiler->paEscEols[i].offEol + 1 + pCompiler->cchEolSeq;
3155	iLine++;
3156	i++;
3157	}
3158	KMK_CC_ASSERT(off <= pCompiler->cchContent);
3159
3160	if (pCompiler->pEvalProg->pszVarName)
3161	fprintf(stderr, "%s:%u:%u: *** fatal parsing error in %s: ",
3162	pCompiler->pEvalProg->pszFilename, iLine, (unsigned)(off - offLine), pCompiler->pEvalProg->pszVarName);
3163	else
3164	fprintf(stderr, "%s:%u:%u: *** fatal parsing error: ",
3165	pCompiler->pEvalProg->pszFilename, iLine, (unsigned)(off - offLine));
3166	}
3167	else if (pCompiler->pEvalProg->pszVarName)
3168	fprintf(stderr, "%s:%u: *** fatal parsing error in %s: ",
3169	pCompiler->pEvalProg->pszFilename, iLine, pCompiler->pEvalProg->pszVarName);
3170	else
3171	fprintf(stderr, "%s:%u: *** fatal parsing error: ",
3172	pCompiler->pEvalProg->pszFilename, iLine);
3173
3174	/*
3175	* Print the message and die.
3176	*/
3177	va_start(va, pszMsg);
3178	vfprintf(stderr, pszMsg, va);
3179	va_end(va);
3180	fputs(". Stop.\n", stderr);
3181
3182	for (;;)
3183	die(2);
3184	}
3185
3186
3187	static KMK_CC_FN_NO_RETURN void
3188	kmk_cc_eval_fatal_eol(PKMKCCEVALCOMPILER pCompiler, const char *pchEol, unsigned iLine, size_t offLine)
3189	{
3190	pCompiler->iLine = iLine;
3191	pCompiler->offLine = offLine;
3192
3193	for (;;)
3194	kmk_cc_eval_fatal(pCompiler, pchEol, "Missing 2nd EOL character: found %#x instead of %#x\n",
3195	pchEol, pCompiler->chSecondEol);
3196	}
3197
3198
3199	static void kmk_cc_eval_warn(PKMKCCEVALCOMPILER pCompiler, const char pchWhere, const char pszMsg, ...)
3200	{
3201	/** @todo warnings. */
3202	(void)pchWhere;
3203	(void)pCompiler;
3204	(void)pszMsg;
3205	}
3206
3207
3208	/**
3209	* Compiles a string expansion subprogram.
3210	*
3211	* @param pCompiler The compiler state.
3212	* @param pszExpr The expression to compile.
3213	* @param cchExpr The length of the expression.
3214	* @param pSubprog The subprogram to compile.
3215	*/
3216	static void kmk_cc_eval_compile_string_exp_subprog(PKMKCCEVALCOMPILER pCompiler, const char *pszExpr, size_t cchExpr,
3217	PKMKCCEXPSUBPROG pSubprog)
3218	{
3219	int rc = kmk_cc_exp_compile_subprog(pCompiler->ppBlockTail, pszExpr, cchExpr, pSubprog);
3220	if (rc == 0)
3221	return;
3222	kmk_cc_eval_fatal(pCompiler, NULL, "String expansion compile error");
3223	}
3224
3225
3226	/**
3227	* Initializes a subprogam or plain operand structure.
3228	*
3229	* @param pCompiler The compiler state.
3230	* @param pOperand The subprogram or plain structure to init.
3231	* @param pszString The string.
3232	* @param cchString The length of the string.
3233	* @param fPlain Whether it's plain or not. If not, we'll compile it.
3234	*/
3235	static void kmk_cc_eval_init_subprogram_or_plain(PKMKCCEVALCOMPILER pCompiler, PKMKCCEXPSUBPROGORPLAIN pOperand,
3236	const char *pszString, size_t cchString, int fPlain)
3237	{
3238	pOperand->fPlainIsInVarStrCache = 0;
3239	pOperand->bUser = 0;
3240	pOperand->bUser2 = 0;
3241	pOperand->fSubprog = fPlain;
3242	if (fPlain)
3243	{
3244	pOperand->u.Plain.cch = cchString;
3245	pOperand->u.Plain.psz = pszString;
3246	}
3247	else
3248	kmk_cc_eval_compile_string_exp_subprog(pCompiler, pszString, cchString, &pOperand->u.Subprog);
3249	}
3250
3251	/**
3252	* Initializes an array of subprogram-or-plain (spp) operands from a word array.
3253	*
3254	* The words will be duplicated and the caller must therefore call
3255	* kmk_cc_block_realign() when done (it's not done here as the caller may
3256	* initialize several string operands and we don't want any unnecessary
3257	* fragmentation).
3258	*
3259	* @param pCompiler The compiler state.
3260	* @param cWords The number of words to copy.
3261	* @param paSrc The source words.
3262	* @param paDst The destination subprogram-or-plain array.
3263	*/
3264	static void kmk_cc_eval_init_spp_array_from_duplicated_words(PKMKCCEVALCOMPILER pCompiler, unsigned cWords,
3265	PKMKCCEVALWORD paSrc, PKMKCCEXPSUBPROGORPLAIN paDst)
3266	{
3267	unsigned i;
3268	for (i = 0; i < cWords; i++)
3269	{
3270	const char *pszCopy = kmk_cc_block_strdup(pCompiler->ppBlockTail, paSrc[i].pchWord, paSrc[i].cchWord);
3271	paDst[i].fPlainIsInVarStrCache = 0;
3272	paDst[i].bUser = 0;
3273	paDst[i].bUser2 = 0;
3274	if (paSrc[i].enmToken == kKmkCcEvalToken_WordWithDollar)
3275	{
3276	paDst[i].fSubprog = 1;
3277	kmk_cc_eval_compile_string_exp_subprog(pCompiler, pszCopy, paSrc[i].cchWord, &paDst[i].u.Subprog);
3278	}
3279	else
3280	{
3281	paDst[i].fSubprog = 0;
3282	paDst[i].u.Plain.cch = paSrc[i].cchWord;
3283	paDst[i].u.Plain.psz = pszCopy;
3284	}
3285	KMK_CC_EVAL_DPRINTF((" %s\n", pszCopy));
3286	}
3287	}
3288
3289
3290
3291	/** @name KMK_CC_WORD_COMP_CONST_XXX - Optimal(/insane) constant work matching.
3292	* @{
3293	*/
3294	#if (defined(KBUILD_ARCH_X86) \|\| defined(KBUILD_ARCH_AMD64)) /* Unaligned access is reasonably cheap. */ \
3295	&& !defined(GCC_ADDRESS_SANITIZER)
3296	# define KMK_CC_WORD_COMP_CONST_2(a_pchLine, a_pszWord) \
3297	( (uint16_t const )(a_pchLine) == (uint16_t const )(a_pszWord) )
3298	# define KMK_CC_WORD_COMP_CONST_3(a_pchLine, a_pszWord) \
3299	( (uint16_t const )(a_pchLine) == (uint16_t const )(a_pszWord) \
3300	&& (a_pchLine)[2] == (a_pszWord)[2] )
3301	# define KMK_CC_WORD_COMP_CONST_4(a_pchLine, a_pszWord) \
3302	( (uint32_t const )(a_pchLine) == (uint32_t const )(a_pszWord) )
3303	# define KMK_CC_WORD_COMP_CONST_5(a_pchLine, a_pszWord) \
3304	( (uint32_t const )(a_pchLine) == (uint32_t const )(a_pszWord) \
3305	&& (a_pchLine)[4] == (a_pszWord)[4] )
3306	# define KMK_CC_WORD_COMP_CONST_6(a_pchLine, a_pszWord) \
3307	( (uint32_t const )(a_pchLine) == (uint32_t const )(a_pszWord) \
3308	&& ((uint16_t const )(a_pchLine))[2] == ((uint32_t const )(a_pszWord))[2] )
3309	# define KMK_CC_WORD_COMP_CONST_7(a_pchLine, a_pszWord) \
3310	( (uint32_t const )(a_pchLine) == (uint32_t const )(a_pszWord) \
3311	&& ((uint16_t const )(a_pchLine))[2] == ((uint32_t const )(a_pszWord))[2] \
3312	&& (a_pchLine)[6] == (a_pszWord)[6] )
3313	# define KMK_CC_WORD_COMP_CONST_8(a_pchLine, a_pszWord) \
3314	( (uint64_t const )(a_pchLine) == (uint64_t const )(a_pszWord) )
3315	# define KMK_CC_WORD_COMP_CONST_10(a_pchLine, a_pszWord) \
3316	( (uint64_t const )(a_pchLine) == (uint64_t const )(a_pszWord) \
3317	&& ((uint16_t const )(a_pchLine))[4] == ((uint16_t const )(a_pszWord))[4] )
3318	# define KMK_CC_WORD_COMP_CONST_16(a_pchLine, a_pszWord) \
3319	( (uint64_t const )(a_pchLine) == (uint64_t const )(a_pszWord) \
3320	&& ((uint64_t const )(a_pchLine))[1] == ((uint64_t const )(a_pszWord))[1] )
3321	#else
3322	# define KMK_CC_WORD_COMP_CONST_2(a_pchLine, a_pszWord) \
3323	( (a_pchLine)[0] == (a_pszWord)[0] \
3324	&& (a_pchLine)[1] == (a_pszWord)[1] )
3325	# define KMK_CC_WORD_COMP_CONST_3(a_pchLine, a_pszWord) \
3326	( (a_pchLine)[0] == (a_pszWord)[0] \
3327	&& (a_pchLine)[1] == (a_pszWord)[1] \
3328	&& (a_pchLine)[2] == (a_pszWord)[2] )
3329	# define KMK_CC_WORD_COMP_CONST_4(a_pchLine, a_pszWord) \
3330	( (a_pchLine)[0] == (a_pszWord)[0] \
3331	&& (a_pchLine)[1] == (a_pszWord)[1] \
3332	&& (a_pchLine)[2] == (a_pszWord)[2] \
3333	&& (a_pchLine)[3] == (a_pszWord)[3] )
3334	# define KMK_CC_WORD_COMP_CONST_5(a_pchLine, a_pszWord) \
3335	( (a_pchLine)[0] == (a_pszWord)[0] \
3336	&& (a_pchLine)[1] == (a_pszWord)[1] \
3337	&& (a_pchLine)[2] == (a_pszWord)[2] \
3338	&& (a_pchLine)[3] == (a_pszWord)[3] \
3339	&& (a_pchLine)[4] == (a_pszWord)[4] )
3340	# define KMK_CC_WORD_COMP_CONST_6(a_pchLine, a_pszWord) \
3341	( (a_pchLine)[0] == (a_pszWord)[0] \
3342	&& (a_pchLine)[1] == (a_pszWord)[1] \
3343	&& (a_pchLine)[2] == (a_pszWord)[2] \
3344	&& (a_pchLine)[3] == (a_pszWord)[3] \
3345	&& (a_pchLine)[4] == (a_pszWord)[4] \
3346	&& (a_pchLine)[5] == (a_pszWord)[5] )
3347	# define KMK_CC_WORD_COMP_CONST_7(a_pchLine, a_pszWord) \
3348	( (a_pchLine)[0] == (a_pszWord)[0] \
3349	&& (a_pchLine)[1] == (a_pszWord)[1] \
3350	&& (a_pchLine)[2] == (a_pszWord)[2] \
3351	&& (a_pchLine)[3] == (a_pszWord)[3] \
3352	&& (a_pchLine)[4] == (a_pszWord)[4] \
3353	&& (a_pchLine)[5] == (a_pszWord)[5] \
3354	&& (a_pchLine)[6] == (a_pszWord)[6] )
3355	# define KMK_CC_WORD_COMP_CONST_8(a_pchLine, a_pszWord) \
3356	( (a_pchLine)[0] == (a_pszWord)[0] \
3357	&& (a_pchLine)[1] == (a_pszWord)[1] \
3358	&& (a_pchLine)[2] == (a_pszWord)[2] \
3359	&& (a_pchLine)[3] == (a_pszWord)[3] \
3360	&& (a_pchLine)[4] == (a_pszWord)[4] \
3361	&& (a_pchLine)[5] == (a_pszWord)[5] \
3362	&& (a_pchLine)[6] == (a_pszWord)[6] \
3363	&& (a_pchLine)[7] == (a_pszWord)[7] )
3364	# define KMK_CC_WORD_COMP_CONST_10(a_pchLine, a_pszWord) \
3365	( (a_pchLine)[0] == (a_pszWord)[0] \
3366	&& (a_pchLine)[1] == (a_pszWord)[1] \
3367	&& (a_pchLine)[2] == (a_pszWord)[2] \
3368	&& (a_pchLine)[3] == (a_pszWord)[3] \
3369	&& (a_pchLine)[4] == (a_pszWord)[4] \
3370	&& (a_pchLine)[5] == (a_pszWord)[5] \
3371	&& (a_pchLine)[6] == (a_pszWord)[6] \
3372	&& (a_pchLine)[7] == (a_pszWord)[7] \
3373	&& (a_pchLine)[8] == (a_pszWord)[8] \
3374	&& (a_pchLine)[9] == (a_pszWord)[9] )
3375	# define KMK_CC_WORD_COMP_CONST_16(a_pchLine, a_pszWord) \
3376	( (a_pchLine)[0] == (a_pszWord)[0] \
3377	&& (a_pchLine)[1] == (a_pszWord)[1] \
3378	&& (a_pchLine)[2] == (a_pszWord)[2] \
3379	&& (a_pchLine)[3] == (a_pszWord)[3] \
3380	&& (a_pchLine)[4] == (a_pszWord)[4] \
3381	&& (a_pchLine)[5] == (a_pszWord)[5] \
3382	&& (a_pchLine)[6] == (a_pszWord)[6] \
3383	&& (a_pchLine)[7] == (a_pszWord)[7] \
3384	&& (a_pchLine)[8] == (a_pszWord)[8] \
3385	&& (a_pchLine)[9] == (a_pszWord)[9] \
3386	&& (a_pchLine)[10] == (a_pszWord)[10] \
3387	&& (a_pchLine)[11] == (a_pszWord)[11] \
3388	&& (a_pchLine)[12] == (a_pszWord)[12] \
3389	&& (a_pchLine)[13] == (a_pszWord)[13] \
3390	&& (a_pchLine)[14] == (a_pszWord)[14] \
3391	&& (a_pchLine)[15] == (a_pszWord)[15])
3392	#endif
3393	/** See if a starting of a given length starts with a constant word. */
3394	#define KMK_CC_WORD_COMP_IS_EOL(a_pCompiler, a_pchLine, a_cchLine) \
3395	( (a_cchLine) == 0 \
3396	\|\| KMK_CC_EVAL_IS_SPACE((a_pchLine)[0]) \
3397	\|\| ((a_pchLine)[0] == '\\' && (a_pchLine)[1] == (a_pCompiler)->chFirstEol) ) \
3398
3399	/** See if a starting of a given length starts with a constant word. */
3400	#define KMK_CC_WORD_COMP_CONST(a_pCompiler, a_pchLine, a_cchLine, a_pszWord, a_cchWord) \
3401	( (a_cchLine) >= (a_cchWord) \
3402	&& ( (a_cchLine) == (a_cchWord) \
3403	\|\| KMK_CC_EVAL_IS_SPACE((a_pchLine)[a_cchWord]) \
3404	\|\| ((a_pchLine)[a_cchWord] == '\\' && (a_pchLine)[(a_cchWord) + 1] == (a_pCompiler)->chFirstEol) ) \
3405	&& KMK_CC_WORD_COMP_CONST_##a_cchWord(a_pchLine, a_pszWord) )
3406	/** @} */
3407
3408
3409	/**
3410	* Checks if a_ch is a space after a word.
3411	*
3412	* Since there is always a terminating zero, the user can safely access a char
3413	* beyond @a a_cchLeft. However, that byte isn't necessarily a zero terminator
3414	* character, so we have to check @a a_cchLeft whether we're at the end of the
3415	* parsing input string.
3416	*
3417	* @returns true / false.
3418	* @param a_pCompiler The compiler instance data.
3419	* @param a_ch The character to inspect.
3420	* @param a_ch2 The character following it, in case of escaped EOL.
3421	* @param a_cchLeft The number of chars left to parse (from @a a_ch).
3422	*/
3423	#define KMK_CC_EVAL_IS_SPACE_AFTER_WORD(a_pCompiler, a_ch, a_ch2, a_cchLeft) \
3424	( a_cchLeft == 0 \
3425	\|\| KMK_CC_EVAL_IS_SPACE(a_ch) \
3426	\|\| ((a_ch) == '\\' && (a_ch2) == (a_pCompiler)->chFirstEol) )
3427
3428
3429	/**
3430	* Common path for space skipping worker functions when escaped EOLs may be
3431	* involed.
3432	*
3433	* @returns Points to the first non-space character or end of input.
3434	* @param pchWord The current position. There is some kind of char
3435	* @param cchLeft The current number of chars left to parse in the
3436	* current line.
3437	* @param pcchLeft Where to store the updated @a cchLeft value.
3438	* @param pCompiler The compiler instance data.
3439	*/
3440	static const char kmk_cc_eval_skip_spaces_with_esc_eol(const char pchWord, size_t cchLeft, size_t *pcchLeft,
3441	PKMKCCEVALCOMPILER pCompiler)
3442	{
3443	/*
3444	* Skip further spaces. We unrolls 4 loops here.
3445	* ASSUMES cchEscEolSeq is either 2 or 3!
3446	*/
3447	KMK_CC_ASSERT(pCompiler->cchEscEolSeq == 2 \|\| pCompiler->cchEscEolSeq == 3);
3448	KMK_CC_ASSERT(pCompiler->iEscEol < pCompiler->cEscEols);
3449	while (cchLeft >= 4)
3450	{
3451	/* First char. */
3452	char ch = pchWord[0];
3453	if (KMK_CC_EVAL_IS_SPACE(ch))
3454	{ /* maybe likely */ }
3455	else if ( ch == '\\'
3456	&& pchWord[1] == pCompiler->chFirstEol)
3457	{
3458	pchWord += pCompiler->cchEscEolSeq;
3459	cchLeft -= pCompiler->cchEscEolSeq;
3460	pCompiler->iEscEol++;
3461	continue;
3462	}
3463	else
3464	{
3465	*pcchLeft = cchLeft;
3466	return pchWord;
3467	}
3468
3469	/* Second char. */
3470	ch = pchWord[1];
3471	if (KMK_CC_EVAL_IS_SPACE(ch))
3472	{ /* maybe likely */ }
3473	else if ( ch == '\\'
3474	&& pchWord[2] == pCompiler->chFirstEol)
3475	{
3476	pchWord += 1 + pCompiler->cchEscEolSeq;
3477	cchLeft -= 1 + pCompiler->cchEscEolSeq;
3478	pCompiler->iEscEol++;
3479	continue;
3480	}
3481	else
3482	{
3483	*pcchLeft = cchLeft - 1;
3484	return pchWord + 1;
3485	}
3486
3487	/* Third char. */
3488	ch = pchWord[2];
3489	if (KMK_CC_EVAL_IS_SPACE(ch))
3490	{ /* maybe likely */ }
3491	else if ( ch == '\\'
3492	&& pchWord[3] == pCompiler->chFirstEol
3493	&& cchLeft >= 2 + pCompiler->cchEscEolSeq)
3494	{
3495	pchWord += 2 + pCompiler->cchEscEolSeq;
3496	cchLeft -= 2 + pCompiler->cchEscEolSeq;
3497	pCompiler->iEscEol++;
3498	continue;
3499	}
3500	else
3501	{
3502	*pcchLeft = cchLeft - 2;
3503	return pchWord + 2;
3504	}
3505
3506	/* Third char. */
3507	ch = pchWord[3];
3508	if (KMK_CC_EVAL_IS_SPACE(ch))
3509	{
3510	pchWord += 4;
3511	cchLeft -= 4;
3512	}
3513	else if ( ch == '\\'
3514	&& cchLeft >= 3 + pCompiler->cchEscEolSeq
3515	&& pchWord[4] == pCompiler->chFirstEol)
3516	{
3517	pchWord += 3 + pCompiler->cchEscEolSeq;
3518	cchLeft -= 3 + pCompiler->cchEscEolSeq;
3519	pCompiler->iEscEol++;
3520	}
3521	else
3522	{
3523	*pcchLeft = cchLeft - 3;
3524	return pchWord + 3;
3525	}
3526	}
3527
3528	/*
3529	* Simple loop for the final three chars.
3530	*/
3531	while (cchLeft > 0)
3532	{
3533	/* First char. */
3534	char ch = *pchWord;
3535	if (KMK_CC_EVAL_IS_SPACE(ch))
3536	{
3537	pchWord += 1;
3538	cchLeft -= 1;
3539	}
3540	else if ( ch == '\\'
3541	&& cchLeft > pCompiler->cchEolSeq
3542	&& pchWord[1] == pCompiler->chFirstEol)
3543	{
3544	pchWord += pCompiler->cchEscEolSeq;
3545	cchLeft -= pCompiler->cchEscEolSeq;
3546	pCompiler->iEscEol++;
3547	}
3548	else
3549	break;
3550	}
3551
3552	*pcchLeft = cchLeft;
3553	return pchWord;
3554	}
3555
3556
3557	/**
3558	* Common path for space skipping worker functions when no escaped EOLs need
3559	* considering.
3560	*
3561	* @returns Points to the first non-space character or end of input.
3562	* @param pchWord The current position. There is some kind of char
3563	* @param cchLeft The current number of chars left to parse in the
3564	* current line.
3565	* @param pcchLeft Where to store the updated @a cchLeft value.
3566	* @param pCompiler The compiler instance data.
3567	*/
3568	static const char kmk_cc_eval_skip_spaces_without_esc_eol(const char pchWord, size_t cchLeft, size_t *pcchLeft,
3569	PKMKCCEVALCOMPILER pCompiler)
3570	{
3571	/*
3572	* 4x loop unroll.
3573	*/
3574	while (cchLeft >= 4)
3575	{
3576	if (KMK_CC_EVAL_IS_SPACE(pchWord[0]))
3577	{
3578	if (KMK_CC_EVAL_IS_SPACE(pchWord[1]))
3579	{
3580	if (KMK_CC_EVAL_IS_SPACE(pchWord[2]))
3581	{
3582	if (KMK_CC_EVAL_IS_SPACE(pchWord[3]))
3583	{
3584	pchWord += 4;
3585	cchLeft -= 4;
3586	}
3587	else
3588	{
3589	*pcchLeft = cchLeft - 3;
3590	return pchWord + 3;
3591	}
3592	}
3593	else
3594	{
3595	*pcchLeft = cchLeft - 2;
3596	return pchWord + 2;
3597	}
3598	}
3599	else
3600	{
3601	*pcchLeft = cchLeft - 1;
3602	return pchWord + 1;
3603	}
3604	}
3605	else
3606	{
3607	*pcchLeft = cchLeft;
3608	return pchWord;
3609	}
3610	}
3611
3612	/*
3613	* The last 3. Not entirely sure if this yield good code.
3614	*/
3615	switch (cchLeft & 3)
3616	{
3617	case 3:
3618	if (!KMK_CC_EVAL_IS_SPACE(*pchWord))
3619	break;
3620	pchWord++;
3621	cchLeft--;
3622	case 2:
3623	if (!KMK_CC_EVAL_IS_SPACE(*pchWord))
3624	break;
3625	pchWord++;
3626	cchLeft--;
3627	case 1:
3628	if (!KMK_CC_EVAL_IS_SPACE(*pchWord))
3629	break;
3630	pchWord++;
3631	cchLeft--;
3632	case 0:
3633	break;
3634	}
3635
3636	*pcchLeft = cchLeft;
3637	return pchWord;
3638	}
3639
3640
3641	/**
3642	* Used to skip spaces after a word.
3643	*
3644	* We ASSUME that the first char is a space or that we've reached the end of the
3645	* string (a_cchLeft == 0).
3646	*
3647	* @param a_pCompiler The compiler instance data.
3648	* @param a_pchWord The current input position, this will be moved to
3649	* the start of the next word or end of the input.
3650	* @param a_cchLeft The number of chars left to parse. This will be
3651	* updated.
3652	*/
3653	#define KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(a_pCompiler, a_pchWord, a_cchLeft) \
3654	do { \
3655	/* Skip the first char which is known to be a space, end of line or end of input. */ \
3656	if ((a_cchLeft) > 0) \
3657	{ \
3658	char const chSkipBlanksFirst = *(a_pchWord); \
3659	KMK_CC_ASSERT(KMK_CC_EVAL_IS_SPACE_AFTER_WORD(a_pCompiler, chSkipBlanksFirst, (a_pchWord)[1], a_cchLeft)); \
3660	if (chSkipBlanksFirst != '\\') \
3661	{ \
3662	(a_pchWord) += 1; \
3663	(a_cchLeft) -= 1; \
3664	\
3665	/* Another space or escaped EOL? Then there are probably more then, so call worker function. */ \
3666	if ((a_cchLeft) > 0) \
3667	{ \
3668	char const chSkipBlanksSecond = *(a_pchWord); \
3669	if (KMK_CC_EVAL_IS_SPACE_OR_BACKSLASH(chSkipBlanksSecond)) \
3670	(a_pchWord) = kmk_cc_eval_skip_spaces_after_word_slow(a_pchWord, &(a_cchLeft), \
3671	chSkipBlanksSecond, a_pCompiler); \
3672	} \
3673	} \
3674	else /* escape sequences can be complicated. */ \
3675	(a_pchWord) = kmk_cc_eval_skip_spaces_after_word_slow(a_pchWord, &(a_cchLeft), \
3676	chSkipBlanksFirst, a_pCompiler); \
3677	} \
3678	} while (0)
3679
3680	/**
3681	* The slow path of KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD.
3682	*
3683	* This is called to handles escaped EOL sequences, as these can involve
3684	* multiple backslashes and therefore doesn't led themselves well to inlined
3685	* code.
3686	*
3687	* The other case this is used for is to handle more than once space, since it's
3688	* likely that when there are two there might be more. No point in inlining
3689	* that, better do some loop unrolling instead.
3690	*
3691	* @returns Points to the first non-space character or end of input.
3692	* @param pchWord The current position. There is some kind of char
3693	* @param pcchLeft Pointer to the cchLeft variable, this is both
3694	* input and output.
3695	* @param ch The current character.
3696	* @param pCompiler The compiler instance data.
3697	*/
3698	static const char kmk_cc_eval_skip_spaces_after_word_slow(const char pchWord, size_t *pcchLeft, char ch,
3699	PKMKCCEVALCOMPILER pCompiler)
3700	{
3701	size_t cchLeft = *pcchLeft;
3702
3703	/*
3704	* It's all very simple when we don't have to consider escaped EOLs.
3705	*/
3706	if (pCompiler->iEscEol >= pCompiler->cEscEols)
3707	{
3708	if (ch != '\\')
3709	{
3710	pchWord += 1;
3711	cchLeft -= 1;
3712	}
3713	else
3714	return pchWord;
3715	return kmk_cc_eval_skip_spaces_without_esc_eol(pchWord, cchLeft, pcchLeft, pCompiler);
3716	}
3717
3718	/*
3719	* Skip the pending space or EOL found by the caller. We need to
3720	* confirm the EOL.
3721	*
3722	* Note! We only need to care about simple backslash+EOL sequences here
3723	* since we're either at the end of a validated word, or we've already
3724	* skipped one space. In the former case, someone else has already
3725	* validated the escape esequence, in the latter case multiple
3726	* backslashes would indicate a new word that that we should return.
3727	*/
3728	if (ch != '\\')
3729	{
3730	pchWord += 1;
3731	cchLeft -= 1;
3732	}
3733	else if ( cchLeft >= pCompiler->cchEscEolSeq
3734	&& pchWord[1] == pCompiler->chFirstEol)
3735	{
3736	KMK_CC_ASSERT(pCompiler->cchEolSeq == 1 \|\| pchWord[2] == pCompiler->chSecondEol);
3737	pchWord += pCompiler->cchEscEolSeq;
3738	cchLeft -= pCompiler->cchEscEolSeq;
3739	pCompiler->iEscEol++;
3740
3741	if (pCompiler->iEscEol < pCompiler->cEscEols)
3742	{ /* likely */ }
3743	else return kmk_cc_eval_skip_spaces_without_esc_eol(pchWord, cchLeft, pcchLeft, pCompiler);
3744	}
3745	else
3746	return pchWord;
3747	return kmk_cc_eval_skip_spaces_with_esc_eol(pchWord, cchLeft, pcchLeft, pCompiler);
3748	}
3749
3750
3751	/**
3752	* Skip zero or more spaces.
3753	*
3754	* This macro deals with a single space, if there are more or we're hittin some
3755	* possible escaped EOL sequence, work is deferred to a worker function.
3756	*
3757	* @param a_pCompiler The compiler state.
3758	* @param a_pchWord The current input position. Advanced past spaces.
3759	* @param a_cchLeft The amount of input left to parse. Will be updated.
3760	*/
3761	#define KMK_CC_EVAL_SKIP_SPACES(a_pCompiler, a_pchWord, a_cchLeft) \
3762	do { \
3763	if ((a_cchLeft) > 0) \
3764	{ \
3765	char chSkipSpaces = *(a_pchWord); \
3766	if (KMK_CC_EVAL_IS_SPACE_OR_BACKSLASH(chSkipSpaces)) \
3767	{ \
3768	if (chSkipSpaces != '\\') \
3769	{ \
3770	(a_pchWord) += 1; \
3771	(a_cchLeft) -= 1; \
3772	chSkipSpaces = *(a_pchWord); \
3773	if (KMK_CC_EVAL_IS_SPACE_OR_BACKSLASH(chSkipSpaces)) \
3774	(a_pchWord) = kmk_cc_eval_skip_spaces_slow(a_pchWord, &(a_cchLeft), chSkipSpaces, a_pCompiler); \
3775	} \
3776	else \
3777	(a_pchWord) = kmk_cc_eval_skip_spaces_slow(a_pchWord, &(a_cchLeft), chSkipSpaces, a_pCompiler); \
3778	} \
3779	} \
3780	} while (0)
3781
3782
3783	/**
3784	* Worker for KMK_CC_EVAL_SKIP_SPACES.
3785	*
3786	* @returns Points to the first non-space character or end of input.
3787	* @param pchWord The current position. There is some kind of char
3788	* @param pcchLeft Pointer to the cchLeft variable, this is both
3789	* input and output.
3790	* @param ch The current character.
3791	* @param pCompiler The compiler instance data.
3792	*/
3793	static const char kmk_cc_eval_skip_spaces_slow(const char pchWord, size_t *pcchLeft, char ch, PKMKCCEVALCOMPILER pCompiler)
3794	{
3795	size_t cchLeft = *pcchLeft;
3796	#ifdef KMK_CC_STRICT
3797	size_t offWordCcStrict = pchWord - pCompiler->pszContent;
3798	#endif
3799	KMK_CC_ASSERT(cchLeft > 0);
3800	KMK_CC_ASSERT(cchLeft <= pCompiler->cchLine);
3801	KMK_CC_ASSERT(*pchWord == ch);
3802	KMK_CC_ASSERT(KMK_CC_EVAL_IS_SPACE_OR_BACKSLASH(ch));
3803	KMK_CC_ASSERT(offWordCcStrict >= pCompiler->offLine);
3804	KMK_CC_ASSERT(offWordCcStrict < pCompiler->offLine + pCompiler->cchLine);
3805	KMK_CC_ASSERT( pCompiler->iEscEol >= pCompiler->cEscEols
3806	\|\| offWordCcStrict <= pCompiler->paEscEols[pCompiler->iEscEol].offEsc);
3807	KMK_CC_ASSERT( pCompiler->iEscEol >= pCompiler->cEscEols
3808	\|\| pCompiler->iEscEol == 0
3809	\|\| offWordCcStrict >= pCompiler->paEscEols[pCompiler->iEscEol - 1].offEol + pCompiler->cchEolSeq);
3810
3811	/*
3812	* If we don't need to consider escaped EOLs, things are much much simpler.
3813	*/
3814	if (pCompiler->iEscEol >= pCompiler->cEscEols)
3815	{
3816	if (ch != '\\')
3817	{
3818	pchWord++;
3819	cchLeft--;
3820	}
3821	else
3822	return pchWord;
3823	return kmk_cc_eval_skip_spaces_without_esc_eol(pchWord, cchLeft, pcchLeft, pCompiler);
3824	}
3825
3826	/*
3827	* Possible escaped EOL complications.
3828	*/
3829	if (ch != '\\')
3830	{
3831	pchWord++;
3832	cchLeft--;
3833	}
3834	else
3835	{
3836	size_t cchSkip;
3837	size_t offWord;
3838	unsigned iEscEol = pCompiler->iEscEol;
3839	if (iEscEol >= pCompiler->cEscEols)
3840	return pchWord;
3841
3842	offWord = pchWord - pCompiler->pszContent;
3843	if (offWord < pCompiler->paEscEols[iEscEol].offEsc)
3844	return pchWord;
3845	KMK_CC_ASSERT(offWord == pCompiler->paEscEols[iEscEol].offEsc);
3846
3847	cchSkip = pCompiler->paEscEols[iEscEol].offEol + pCompiler->cchEolSeq - offWord;
3848	pchWord += cchSkip;
3849	cchLeft -= cchSkip;
3850	pCompiler->iEscEol = ++iEscEol;
3851
3852	if (iEscEol < pCompiler->cEscEols)
3853	{ /* likely */ }
3854	else return kmk_cc_eval_skip_spaces_without_esc_eol(pchWord, cchLeft, pcchLeft, pCompiler);
3855	}
3856	return kmk_cc_eval_skip_spaces_with_esc_eol(pchWord, cchLeft, pcchLeft, pCompiler);
3857	}
3858
3859
3860	/**
3861	* Skips to the end of a variable name.
3862	*
3863	* This may advance pCompiler->iEscEol.
3864	*
3865	* @returns Pointer to the first char after the variable name.
3866	* @param pCompiler The compiler state.
3867	* @param pchWord The current position. Must be at the start of the
3868	* variable name.
3869	* @param cchLeft The number of chars left to parse in the current line.
3870	* @param pcchLeft The to store the updated count of characters left to
3871	* parse.
3872	* @param pfPlain Where to store the plain variable name indicator.
3873	* Returns 0 if plain, and 1 if there are variable
3874	* references in it.
3875	*/
3876	static const char kmk_cc_eval_skip_var_name(PKMKCCEVALCOMPILER pCompiler, const char pchWord, size_t cchLeft,
3877	size_t pcchLeft, int pfPlain)
3878	{
3879	const char * const pszContent = pCompiler->pszContent;
3880	size_t off = pchWord - pszContent;
3881	size_t const offLineEnd = off + cchLeft;
3882	int fPlain = 1;
3883	unsigned iEscEol = pCompiler->iEscEol;
3884
3885	/* Check our expectations. */
3886	KMK_CC_ASSERT(cchLeft);
3887	KMK_CC_ASSERT(!KMK_CC_EVAL_IS_SPACE(*pchWord));
3888	KMK_CC_ASSERT(iEscEol <= pCompiler->cEscEols);
3889	KMK_CC_ASSERT( iEscEol >= pCompiler->cEscEols
3890	\|\| off < pCompiler->paEscEols[iEscEol].offEol);
3891	KMK_CC_ASSERT(off >= (iEscEol == 0 ? pCompiler->offLine : pCompiler->paEscEols[iEscEol - 1].offEol + pCompiler->cchEolSeq));
3892
3893	/*
3894	* The outer loop parses plain text. Variable expansion ($) is handled
3895	* by an inner loop.
3896	*/
3897	while (off < offLineEnd)
3898	{
3899	char ch = pszContent[off];
3900	if (!KMK_CC_EVAL_IS_SPACE_DOLLAR_OR_SLASH(ch))
3901	off++;
3902	else if (KMK_CC_EVAL_IS_SPACE(ch))
3903	break;
3904	else if (ch == '$')
3905	{
3906	off++;
3907	if (off < offLineEnd)
3908	{
3909	char const chOpen = pszContent[off];
3910	if (chOpen == '(' \|\| chOpen == '{')
3911	{
3912	/*
3913	* Got a $(VAR) or ${VAR} to deal with here. This may
3914	* include nested variable references and span multiple
3915	* lines (at least for function calls).
3916	*
3917	* We scan forward till we've found the corresponding
3918	* closing parenthesis, considering any open parentheses
3919	* of the same kind as worth counting, even if there are
3920	* no dollar preceeding them, just like GNU make does.
3921	*/
3922	size_t const offStart = off - 1;
3923	char const chClose = chOpen == '(' ? ')' : '}';
3924	unsigned cOpen = 1;
3925	off++;
3926	for (;;)
3927	{
3928	if (off < offLineEnd)
3929	{
3930	ch = pszContent[off];
3931	if (!(KMK_CC_EVAL_IS_PAREN_OR_SLASH(ch)))
3932	off++;
3933	else
3934	{
3935	off++;
3936	if (ch == chClose)
3937	{
3938	if (--cOpen == 0)
3939	break;
3940	}
3941	else if (ch == chOpen)
3942	cOpen++;
3943	else if ( ch == '\\'
3944	&& iEscEol < pCompiler->cEscEols
3945	&& off == pCompiler->paEscEols[iEscEol].offEsc)
3946	{
3947	off = pCompiler->paEscEols[iEscEol].offEol + pCompiler->cchEolSeq;
3948	pCompiler->iEscEol = ++iEscEol;
3949	}
3950	}
3951	}
3952	else if (cOpen == 1)
3953	kmk_cc_eval_fatal(pCompiler, &pszContent[offStart],
3954	"Variable reference is missing '%c'", chClose);
3955	else
3956	kmk_cc_eval_fatal(pCompiler, &pszContent[offStart],
3957	"%u variable references are missing '%c'", cOpen, chClose);
3958	}
3959	}
3960	/* Single char variable name. */
3961	else if (!KMK_CC_EVAL_IS_SPACE(chOpen))
3962	{ /* likely */ }
3963	else
3964	kmk_cc_eval_fatal(pCompiler, &pszContent[off], "Expected variable name after '$', not end of line");
3965	}
3966	else
3967	kmk_cc_eval_fatal(pCompiler, &pszContent[off], "Expected variable name after '$', not end of line");
3968	fPlain = 0;
3969	}
3970	/* Deal with potential escaped EOL. */
3971	else if ( ch != '\\'
3972	\|\| iEscEol >= pCompiler->cEscEols
3973	\|\| off != pCompiler->paEscEols[iEscEol].offEsc )
3974	off++;
3975	else
3976	break;
3977	}
3978
3979	*pcchLeft = offLineEnd - off;
3980	*pfPlain = fPlain;
3981	return &pszContent[off];
3982	}
3983
3984
3985	#if 0 /* unused atm */
3986	/**
3987	* Prepares for copying a command line.
3988	*
3989	* The current version of this code will not modify any of the paEscEols
3990	* entries, unlike our kmk_cc_eval_prep_normal_line sibling function.
3991	*
3992	* @returns The number of chars that will be copied by
3993	* kmk_cc_eval_copy_prepped_command_line().
3994	* @param pCompiler The compiler instance data.
3995	* @param pchLeft Pointer to the first char to copy from the current line.
3996	* This does not have to the start of a word.
3997	* @param cchLeft The number of chars left on the current line starting at
3998	* @a pchLeft.
3999	*/
4000	static size_t kmk_cc_eval_prep_command_line(PKMKCCEVALCOMPILER pCompiler, const char * const pchLeft, size_t cchLeft)
4001	{
4002	size_t cchRet;
4003	unsigned iEscEol = pCompiler->iEscEol;
4004	unsigned const cEscEols = pCompiler->cEscEols;
4005
4006	KMK_CC_ASSERT(cchLeft > 0);
4007	KMK_CC_ASSERT(iEscEol <= cEscEols);
4008
4009	if (iEscEol >= cEscEols)
4010	{
4011	/*
4012	* No escaped EOLs left, dead simple.
4013	*/
4014	cchRet = cchLeft;
4015	}
4016	else
4017	{
4018	/*
4019	* Compared to the normal prepping of a line, this is actually
4020	* really simple. We need to account for two kind of conversions:
4021	* - One leading tab is skipped after escaped EOL.
4022	* - Convert EOL to LF.
4023	*/
4024	const char * const pszContent = pCompiler->pszContent;
4025	size_t const cchEolSeq = pCompiler->cchEolSeq;
4026
4027	#ifdef KMK_CC_STRICT
4028	size_t const offLeft = pchLeft - pszContent;
4029	KMK_CC_ASSERT(offLeft + cchLeft <= pCompiler->offLine + pCompiler->cchLine);
4030	KMK_CC_ASSERT(offLeft + cchLeft <= pCompiler->cchContent);
4031	KMK_CC_ASSERT(offLeft < pCompiler->paEscEols[iEscEol].offEsc);
4032	KMK_CC_ASSERT(offLeft >= (iEscEol ? pCompiler->paEscEols[cEscEols - 1].offEol + pCompiler->cchEolSeq : pCompiler->offLine));
4033	#endif
4034
4035	cchRet = cchLeft;
4036	if (cchEolSeq > 1)
4037	cchRet -= (cchEolSeq - 1) * cEscEols;
4038	do
4039	{
4040	if (pszContent[pCompiler->paEscEols[cchEolSeq].offEol])
4041	cchRet--;
4042	iEscEol++;
4043	} while (iEscEol < cEscEols);
4044	}
4045	return cchRet;
4046	}
4047
4048
4049	/**
4050	* Copies a command line to the buffer @a pszDst points to.
4051	*
4052	* Must only be used immediately after kmk_cc_eval_prep_command_line().
4053	*
4054	* @returns
4055	* @param pCompiler The compiler instance data.
4056	* @param pchLeft Pointer to the first char to copy from the current line.
4057	* This does not have to the start of a word.
4058	* @param cchPrepped The return value of kmk_cc_eval_prep_command_line().
4059	* @param pszDst The destination buffer, must be at least @a cchPrepped
4060	* plus one (terminator) char big.
4061	*/
4062	static void kmk_cc_eval_copy_prepped_command_line(PKMKCCEVALCOMPILER pCompiler, const char *pchLeft,
4063	size_t cchPrepped, char *pszDst)
4064	{
4065	unsigned iEscEol = pCompiler->iEscEol;
4066	unsigned const cEscEols = pCompiler->cEscEols;
4067	if (iEscEol >= cEscEols)
4068	{
4069	/* Single line. */
4070	memcpy(pszDst, pchLeft, cchPrepped);
4071	pszDst[cchPrepped] = '\0';
4072	}
4073	else
4074	{
4075	/* Multiple lines with normalized EOL and maybe one stripped leading TAB. */
4076	char * const pszDstStart = pszDst;
4077	const char * const pszContent = pCompiler->pszContent;
4078	size_t const cchEolSeq = pCompiler->cchEolSeq;
4079	size_t offLeft = pchLeft - pCompiler->pszContent;
4080	size_t cchCopy;
4081
4082	do
4083	{
4084	size_t offEol = pCompiler->paEscEols[iEscEol].offEsc;
4085	cchCopy = offEol - offLeft;
4086	KMK_CC_ASSERT(offEol >= offLeft);
4087
4088	memcpy(pszDst, &pszContent[offLeft], cchCopy);
4089	pszDst += cchCopy;
4090	*pszDst += '\n';
4091
4092	offLeft = offEol + cchEolSeq;
4093	if (pszContent[offLeft] == '\t')
4094	offLeft++;
4095	} while (iEscEol < cEscEols);
4096
4097	cchCopy = cchPrepped - (pszDst - pszDstStart);
4098	KMK_CC_ASSERT(cchCopy <= cchPrepped);
4099	memcpy(pszDst, &pszContent[offLeft], cchCopy);
4100	pszDst += cchCopy;
4101
4102	*pszDst = '\0';
4103	KMK_CC_ASSERT(pszDst == &pszDstStart[cchPrepped]);
4104	}
4105	}
4106	#endif /* unused atm */
4107
4108
4109	/**
4110	* Helper for ensuring that we've got sufficient number of words allocated.
4111	*/
4112	#define KMK_CC_EVAL_ENSURE_WORDS(a_pCompiler, a_cRequiredWords) \
4113	do { \
4114	if ((a_cRequiredWords) < (a_pCompiler)->cWordsAllocated) \
4115	{ /* likely */ } \
4116	else \
4117	{ \
4118	unsigned cEnsureWords = ((a_cRequiredWords) + 3 /15/) & ~(unsigned)3/15/; \
4119	KMK_CC_ASSERT((a_cRequiredWords) < 0x8000); \
4120	(a_pCompiler)->paWords = (PKMKCCEVALWORD)xmalloc(cEnsureWords * sizeof((a_pCompiler)->paWords)[0]); \
4121	} \
4122	} while (0)
4123
4124	/**
4125	* Parses the remainder of the line into simple words.
4126	*
4127	* The resulting words are classified as either kKmkCcEvalToken_WordPlain or
4128	* kKmkCcEvalToken_WordWithDollar.
4129	*
4130	* @returns Number of words.
4131	* @param pCompiler The compiler state.
4132	* @param pchWord Where to start, we expect this to be at a word.
4133	* @param cchLeft The number of chars left to parse on this line.
4134	* This is expected to be non-zero.
4135	*/
4136	static unsigned kmk_cc_eval_parse_words(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft)
4137	{
4138	unsigned iEscEol = pCompiler->iEscEol;
4139	unsigned cEscEols = pCompiler->cEscEols;
4140	unsigned cWords = 0;
4141
4142	/* Precoditions. */
4143	KMK_CC_ASSERT(cchLeft > 0);
4144	KMK_CC_ASSERT(!KMK_CC_EVAL_IS_SPACE(*pchWord));
4145
4146	/*
4147	* If we don't have to deal with escaped EOLs, the find-end-of word search
4148	* becomes a little bit simpler. Since this function will be used a lot
4149	* for simple lines with single words, this could maybe save a nano second
4150	* or two.
4151	*/
4152	if (iEscEol >= cEscEols)
4153	{
4154	do
4155	{
4156	size_t cchSkipAfter = 0;
4157	size_t cchWord = 1;
4158	KMKCCEVALTOKEN enmToken = kKmkCcEvalToken_WordPlain;
4159
4160	/* Find the end of the current word. */
4161	while (cchWord < cchLeft)
4162	{
4163	char ch = pchWord[cchWord];
4164	if (!KMK_CC_EVAL_IS_SPACE_OR_DOLLAR(ch))
4165	{ /* likely */ }
4166	else if (ch == '$')
4167	enmToken = kKmkCcEvalToken_WordWithDollar;
4168	else
4169	break;
4170	cchWord++;
4171	}
4172
4173	/* Add the word. */
4174	KMK_CC_EVAL_ENSURE_WORDS(pCompiler, cWords + 1);
4175	pCompiler->paWords[cWords].pchWord = pchWord;
4176	pCompiler->paWords[cWords].cchWord = cchWord;
4177	pCompiler->paWords[cWords].enmToken = enmToken;
4178	cWords++;
4179
4180	/* Skip the work and any trailing blanks. */
4181	cchWord += cchSkipAfter;
4182	pchWord += cchWord;
4183	cchLeft -= cchWord;
4184	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4185	} while (cchLeft > 0);
4186	}
4187	/*
4188	* Have to deal with escaped EOLs.
4189	*/
4190	else
4191	{
4192	const char *pszContent = pCompiler->pszContent;
4193	do
4194	{
4195	size_t cchSkipAfter = 0;
4196	size_t cchWord = 1;
4197	KMKCCEVALTOKEN enmToken = kKmkCcEvalToken_WordPlain;
4198
4199	/* Find the end of the current word. */
4200	while (cchWord < cchLeft)
4201	{
4202	char ch = pchWord[cchWord];
4203	if (!KMK_CC_EVAL_IS_SPACE_DOLLAR_OR_SLASH(ch))
4204	{ /* likely */ }
4205	else if (ch == '$')
4206	enmToken = kKmkCcEvalToken_WordWithDollar;
4207	else if (ch != '\\')
4208	break;
4209	else if ((size_t)(&pchWord[cchWord] - pszContent) == pCompiler->paEscEols[iEscEol].offEsc)
4210	{
4211	cchSkipAfter = pCompiler->paEscEols[iEscEol].offEol - pCompiler->paEscEols[iEscEol].offEsc
4212	+ pCompiler->cchEolSeq;
4213	iEscEol++;
4214	break;
4215	}
4216	cchWord++;
4217	}
4218
4219	/* Add the word. */
4220	KMK_CC_EVAL_ENSURE_WORDS(pCompiler, cWords + 1);
4221	pCompiler->paWords[cWords].pchWord = pchWord;
4222	pCompiler->paWords[cWords].cchWord = cchWord;
4223	pCompiler->paWords[cWords].enmToken = enmToken;
4224	cWords++;
4225
4226	/* Skip the work and any trailing blanks. */
4227	cchWord += cchSkipAfter;
4228	pchWord += cchWord;
4229	cchLeft -= cchWord;
4230	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4231	} while (cchLeft > 0);
4232	}
4233	pCompiler->cWords = cWords;
4234	return cWords;
4235	}
4236
4237
4238
4239
4240	/**
4241	* Gather string from segments and optional space insertion trick.
4242	*
4243	* @param pszDst The destination buffer.
4244	* @param paSegs The source segments.
4245	* @param cSegs The number of segments.
4246	* @param cchDstPrepped The size of pszDst, excluding the terminator.
4247	*/
4248	static void kmk_cc_eval_strcpyv(char *pszDst, PCKMKCCEVALSTRCPYSEG paSegs, unsigned cSegs, size_t cchDstPrepped)
4249	{
4250	const char *pszDstStart = pszDst;
4251	unsigned iSeg = 0;
4252	while (iSeg < cSegs)
4253	{
4254	size_t cchToCopy;
4255	if (paSegs[iSeg].cchSrcAndPrependSpace >= 0)
4256	cchToCopy = paSegs[iSeg].cchSrcAndPrependSpace;
4257	else
4258	{
4259	cchToCopy = -paSegs[iSeg].cchSrcAndPrependSpace;
4260	*pszDst++ = ' ';
4261	}
4262
4263	memcpy(pszDst, paSegs[iSeg].pchSrc, cchToCopy);
4264	pszDst += cchToCopy;
4265
4266	iSeg++;
4267	}
4268	*pszDst = '\0';
4269	KMK_CC_ASSERT(pszDst == &pszDstStart[cchDstPrepped]); K_NOREF(pszDstStart); K_NOREF(cchDstPrepped);
4270	}
4271
4272
4273	/**
4274	* Allocate a byte buffer and ocpy the prepared string segments into it.
4275	*
4276	* The caller must call kmk_cc_block_realign!
4277	*
4278	* @returns Pointer to the duplicated string.
4279	* @param pCompiler The compiler instance data.
4280	* @param cchPrepped The length of the prepped string segments.
4281	*/
4282	static char *kmk_cc_eval_strdup_prepped(PKMKCCEVALCOMPILER pCompiler, size_t cchPrepped)
4283	{
4284	char *pszCopy = kmk_cc_block_byte_alloc(pCompiler->ppBlockTail, cchPrepped + 1);
4285	kmk_cc_eval_strcpyv(pszCopy, pCompiler->paStrCopySegs, pCompiler->cStrCopySegs, cchPrepped);
4286	return pszCopy;
4287	}
4288
4289
4290	/**
4291	* Strip trailing spaces from prepped copy
4292	*
4293	* @param paSegs The segments to strip trailing chars from.
4294	* @param pcSegs The number of segments (in/out).
4295	* @param pcchDstPrepped The total number of chars prepped (in/out).
4296	*/
4297	static void kmk_cc_eval_strip_right_v(PKMKCCEVALSTRCPYSEG paSegs, unsigned pcSegs, size_t pcchDstPrepped)
4298	{
4299	/*
4300	* Work our way thru the segments, from the end obviously.
4301	*/
4302	size_t cchDstPrepped = *pcchDstPrepped;
4303	unsigned cSegs = *pcSegs;
4304	while (cSegs > 0)
4305	{
4306	unsigned iSeg = cSegs - 1;
4307	const char *pszSrc = paSegs[iSeg].pchSrc;
4308	size_t cchSrc = paSegs[iSeg].cchSrcAndPrependSpace >= 0
4309	? paSegs[iSeg].cchSrcAndPrependSpace : -paSegs[iSeg].cchSrcAndPrependSpace;
4310	if (cchSrc)
4311	{
4312	/*
4313	* Check for trailing spaces.
4314	*/
4315	size_t cchSrcOrg;
4316	if (!KMK_CC_EVAL_IS_SPACE(pszSrc[cchSrc - 1]))
4317	{
4318	/* Special case: No trailing spaces at all. No need to update
4319	input/output variables. */
4320	if (cSegs == *pcSegs)
4321	return;
4322	break;
4323	}
4324
4325	/* Skip the rest of the trailing spaces. */
4326	cchSrcOrg = cchSrc;
4327	do
4328	cchSrc--;
4329	while (cchSrc > 0 && KMK_CC_EVAL_IS_SPACE(pszSrc[cchSrc - 1]));
4330
4331	if (cchSrc > 0)
4332	{
4333	/*
4334	* There are non-space chars in this segment. So, update the
4335	* segment and total char count and we're done.
4336	*/
4337	cchDstPrepped -= cchSrcOrg - cchSrc;
4338	if (paSegs[iSeg].cchSrcAndPrependSpace < 0)
4339	paSegs[iSeg].cchSrcAndPrependSpace = -(ssize_t)cchSrc;
4340	else
4341	paSegs[iSeg].cchSrcAndPrependSpace = cchSrc;
4342	break;
4343	}
4344
4345	/*
4346	* Skip the whole segment.
4347	*/
4348	cchDstPrepped -= cchSrcOrg + (paSegs[iSeg].cchSrcAndPrependSpace < 0);
4349	}
4350	cSegs--;
4351	}
4352	*pcchDstPrepped = cchDstPrepped;
4353	*pcSegs = cSegs;
4354	}
4355
4356	/**
4357	* Helper for ensuring that we've got sufficient number of string copy segments.
4358	*/
4359	#define KMK_CC_EVAL_ENSURE_STRCOPY_SEGS(a_pCompiler, a_cRequiredSegs) \
4360	do { \
4361	if ((a_cRequiredSegs) < (a_pCompiler)->cStrCopySegsAllocated) \
4362	{ /* likely */ } \
4363	else \
4364	{ \
4365	unsigned cEnsureSegs = ((a_cRequiredSegs) + 3 /15/) & ~(unsigned)3/15/; \
4366	KMK_CC_ASSERT((a_cRequiredSegs) < 0x8000); \
4367	(a_pCompiler)->paStrCopySegs = (PKMKCCEVALSTRCPYSEG)xmalloc(cEnsureSegs * sizeof((a_pCompiler)->paStrCopySegs)[0]); \
4368	} \
4369	} while (0)
4370
4371
4372	/**
4373	* Prepares for copying a normal line, extended version.
4374	*
4375	* This does not assume that we start on a word, it can handle any starting
4376	* character. It can also prepare partial copies.
4377	*
4378	* In addition to the returned information, this will store instruction in
4379	* paEscEols for the following kmk_cc_eval_strcpyv() call.
4380	*
4381	* This will advance pCompiler->iEscEol, so that it's possible to use the common
4382	* macros and helpers for parsing what comes afterwards.
4383	*
4384	* @returns The number of chars that will be copied by kmk_cc_eval_strcpyv().
4385	* @param pCompiler The compiler instance data.
4386	* @param pchWord Pointer to the first char to copy from the
4387	* current line. This must be the start of a
4388	* word.
4389	* @param cchLeft The number of chars left on the current line
4390	* starting at @a pchWord.
4391	*/
4392	static size_t kmk_cc_eval_prep_normal_line_ex(PKMKCCEVALCOMPILER pCompiler, const char * const pchWord, size_t cchLeft)
4393	{
4394	size_t cchRet;
4395	unsigned iEscEol = pCompiler->iEscEol;
4396	unsigned const cEscEols = pCompiler->cEscEols;
4397
4398	KMK_CC_ASSERT(iEscEol <= cEscEols);
4399
4400	if (cchLeft > 0)
4401	{
4402	/*
4403	* If there are no escaped EOLs left, just copy exactly
4404	* what was passed in.
4405	*/
4406	if (iEscEol >= cEscEols)
4407	{
4408	KMK_CC_EVAL_ENSURE_STRCOPY_SEGS(pCompiler, 1);
4409	pCompiler->cStrCopySegs = 1;
4410	pCompiler->paStrCopySegs[0].pchSrc = pchWord;
4411	pCompiler->paStrCopySegs[0].cchSrcAndPrependSpace = cchRet = cchLeft;
4412	}
4413	/*
4414	* Ok, we have to deal with escaped EOLs and do the proper
4415	* replacement of escaped newlines with space. The deal is that we
4416	* collaps all whitespace before and after one or more newlines into a
4417	* single space. (FreeBSD make does this differently, by the by.)
4418	*/
4419	else
4420	{
4421	const char * const pszContent = pCompiler->pszContent;
4422	size_t offWord = pchWord - pCompiler->pszContent;
4423	size_t const offLineEnd = offWord + cchLeft; /* Note! Not necessarily end of line.*/
4424	size_t offEsc;
4425	size_t fPendingSpace = 0;
4426	unsigned cSegs = 0;
4427	size_t cchSeg;
4428
4429	/* Go nuts checking our preconditions here. */
4430	KMK_CC_ASSERT(offWord >= pCompiler->offLine);
4431	KMK_CC_ASSERT(offWord + cchLeft <= pCompiler->offLine + pCompiler->cchLine);
4432	KMK_CC_ASSERT(offWord + cchLeft <= pCompiler->cchContent);
4433	KMK_CC_ASSERT(offWord <= pCompiler->paEscEols[iEscEol].offEsc);
4434	KMK_CC_ASSERT(offWord >= (iEscEol ? pCompiler->paEscEols[cEscEols - 1].offEol + pCompiler->cchEolSeq
4435	: pCompiler->offLine));
4436	KMK_CC_ASSERT(offWord < offLineEnd);
4437
4438	/* Make sure we've got more than enough segments to fill in. */
4439	KMK_CC_EVAL_ENSURE_STRCOPY_SEGS(pCompiler, cEscEols - iEscEol + 2);
4440
4441	/*
4442	* All but the last line.
4443	*/
4444	cchRet = 0;
4445	do
4446	{
4447	KMK_CC_ASSERT(offWord < offLineEnd);
4448	offEsc = pCompiler->paEscEols[iEscEol].offEsc;
4449	if (offWord < offEsc)
4450	{
4451	/* Strip trailing spaces. */
4452	while (offEsc > offWord && KMK_CC_EVAL_IS_SPACE(pszContent[offEsc - 1]))
4453	offEsc--;
4454	cchSeg = offEsc - offWord;
4455	if (cchSeg)
4456	{
4457	/* Add segment. */
4458	pCompiler->paStrCopySegs[cSegs].pchSrc = &pszContent[offWord];
4459	if (offEsc < offLineEnd)
4460	{
4461	pCompiler->paStrCopySegs[cSegs].cchSrcAndPrependSpace = fPendingSpace
4462	? -(ssize_t)cchSeg : (ssize_t)cchSeg;
4463	cchRet += cchSeg + fPendingSpace;
4464	cSegs += 1;
4465	fPendingSpace = 1;
4466	}
4467	else
4468	{
4469	cchSeg = offLineEnd - offWord;
4470	pCompiler->paStrCopySegs[cSegs].cchSrcAndPrependSpace = fPendingSpace
4471	? -(ssize_t)cchSeg : (ssize_t)cchSeg;
4472	pCompiler->cStrCopySegs = cSegs + 1;
4473	pCompiler->iEscEol = iEscEol;
4474	return cchRet + cchSeg + fPendingSpace;
4475	}
4476	}
4477	}
4478	else
4479	KMK_CC_ASSERT(offWord == offEsc);
4480
4481	/* Next line. */
4482	offWord = pCompiler->paEscEols[iEscEol].offEol + pCompiler->cchEolSeq;
4483	iEscEol++;
4484
4485	/* Strip leading spaces. */
4486	while (offWord < offLineEnd && KMK_CC_EVAL_IS_SPACE(pszContent[offWord]))
4487	offWord++;
4488	if (offWord >= offLineEnd)
4489	{
4490	pCompiler->cStrCopySegs = cSegs;
4491	pCompiler->iEscEol = iEscEol;
4492	return cchRet;
4493	}
4494	} while (iEscEol < cEscEols);
4495
4496	/*
4497	* The last line.
4498	*/
4499	cchSeg = offLineEnd - offWord;
4500	cchRet += cchSeg;
4501	pCompiler->paStrCopySegs[cSegs].pchSrc = &pszContent[offWord];
4502	pCompiler->paStrCopySegs[cSegs].cchSrcAndPrependSpace = fPendingSpace
4503	? -(ssize_t)cchSeg : (ssize_t)cchSeg;
4504	pCompiler->cStrCopySegs = cSegs + 1;
4505	pCompiler->iEscEol = iEscEol;
4506	}
4507	}
4508	/*
4509	* Odd case: Nothing to copy.
4510	*/
4511	else
4512	{
4513	cchRet = 0;
4514	pCompiler->cStrCopySegs = 0;
4515	}
4516	return cchRet;
4517	}
4518
4519
4520	/**
4521	* Prepares for copying a normal line, from the given position all the way to
4522	* the end.
4523	*
4524	* In addition to the returned information, this will store instruction in
4525	* paStrCopySegs and cSTrCopySeg for the following kmk_cc_eval_strcpyv() call.
4526	*
4527	* @returns The number of chars that will be copied by kmk_cc_eval_strcpyv().
4528	* @param pCompiler The compiler instance data.
4529	* @param pchWord Pointer to the first char to copy from the
4530	* current line. This must be the start of a
4531	* word.
4532	* @param cchLeft The number of chars left on the current line
4533	* starting at @a pchWord.
4534	*/
4535	static size_t kmk_cc_eval_prep_normal_line(PKMKCCEVALCOMPILER pCompiler, const char * const pchWord, size_t cchLeft)
4536	{
4537	size_t cchRet;
4538	unsigned iEscEol = pCompiler->iEscEol;
4539	unsigned const cEscEols = pCompiler->cEscEols;
4540
4541	KMK_CC_ASSERT(cchLeft > 0);
4542	KMK_CC_ASSERT(!KMK_CC_EVAL_IS_SPACE(pchWord)); / The fact that we're standing at a word, is exploited below. */
4543	KMK_CC_ASSERT(iEscEol <= cEscEols);
4544
4545	/*
4546	* If there are no escaped EOLs left, just copy what was specified,
4547	* optionally sans any trailing spaces.
4548	*/
4549	if (iEscEol >= cEscEols)
4550	{
4551	cchRet = cchLeft;
4552
4553	KMK_CC_EVAL_ENSURE_STRCOPY_SEGS(pCompiler, 1);
4554	pCompiler->cStrCopySegs = 1;
4555	pCompiler->paStrCopySegs[0].pchSrc = pchWord;
4556	pCompiler->paStrCopySegs[0].cchSrcAndPrependSpace = cchRet;
4557	}
4558	/*
4559	* Ok, we have to deal with escaped EOLs and do the proper
4560	* replacement of escaped newlines with space. The deal is that we
4561	* collaps all whitespace before and after one or more newlines into a
4562	* single space. (FreeBSD make does this differently, by the by.)
4563	*/
4564	else
4565	{
4566	const char *pszContent = pCompiler->pszContent;
4567	size_t offWord = pchWord - pCompiler->pszContent;
4568	size_t offEsc;
4569	size_t fPendingSpace;
4570	size_t cchSeg;
4571	unsigned cSegs = 0;
4572
4573	/* Go nuts checking our preconditions here. */
4574	KMK_CC_ASSERT(offWord >= pCompiler->offLine);
4575	KMK_CC_ASSERT(offWord + cchLeft <= pCompiler->offLine + pCompiler->cchLine);
4576	KMK_CC_ASSERT(offWord + cchLeft <= pCompiler->cchContent);
4577	KMK_CC_ASSERT(offWord < pCompiler->paEscEols[iEscEol].offEsc);
4578	KMK_CC_ASSERT(offWord >= (iEscEol ? pCompiler->paEscEols[iEscEol - 1].offEol + pCompiler->cchEolSeq : pCompiler->offLine));
4579
4580	/* Make sure we've got more than enough segments to fill in. */
4581	KMK_CC_EVAL_ENSURE_STRCOPY_SEGS(pCompiler, cEscEols - iEscEol + 2);
4582
4583	/*
4584	* First line - We're at the start of a word, so no left stripping needed.
4585	*/
4586	offEsc = pCompiler->paEscEols[iEscEol].offEsc;
4587	KMK_CC_ASSERT(offEsc > offWord);
4588	while (KMK_CC_EVAL_IS_SPACE(pszContent[offEsc - 1]))
4589	offEsc--;
4590	KMK_CC_ASSERT(offEsc > offWord);
4591
4592	fPendingSpace = 1;
4593	cchRet = offEsc - offWord;
4594	pCompiler->paStrCopySegs[cSegs].cchSrcAndPrependSpace = cchRet;
4595	pCompiler->paStrCopySegs[cSegs].pchSrc = pchWord;
4596	cSegs++;
4597
4598	offWord = pCompiler->paEscEols[iEscEol].offEol + pCompiler->cchEolSeq;
4599	iEscEol++;
4600
4601	/*
4602	* All but the last line.
4603	*/
4604	while (iEscEol < cEscEols)
4605	{
4606	offEsc = pCompiler->paEscEols[iEscEol].offEsc;
4607
4608	/* Strip leading spaces. */
4609	while (offWord < offEsc && KMK_CC_EVAL_IS_SPACE(pszContent[offWord]))
4610	offWord++;
4611
4612	if (offWord < offEsc)
4613	{
4614	/* Strip trailing spaces. */
4615	while (KMK_CC_EVAL_IS_SPACE(pszContent[offEsc - 1]))
4616	offEsc--;
4617	cchSeg = offEsc - offWord;
4618	pCompiler->paStrCopySegs[cSegs].cchSrcAndPrependSpace = fPendingSpace ? -(ssize_t)cchSeg : (ssize_t)cchSeg;
4619	cchRet += cchSeg + fPendingSpace;
4620	pCompiler->paStrCopySegs[cSegs].pchSrc = &pszContent[offWord];
4621	cSegs += 1;
4622	fPendingSpace = 1;
4623	}
4624
4625	/* Next. */
4626	offWord = pCompiler->paEscEols[iEscEol].offEol + pCompiler->cchEolSeq;
4627	iEscEol++;
4628	}
4629
4630	/*
4631	* Final line. We must calculate the end of line offset our selves here.
4632	*/
4633	offEsc = &pchWord[cchLeft] - pszContent;
4634	while (offWord < offEsc && KMK_CC_EVAL_IS_SPACE(pszContent[offWord]))
4635	offWord++;
4636
4637	if (offWord < offEsc)
4638	{
4639	cchSeg = offEsc - offWord;
4640	pCompiler->paStrCopySegs[cSegs].cchSrcAndPrependSpace = fPendingSpace ? -(ssize_t)cchSeg : (ssize_t)cchSeg;
4641	cchRet += cchSeg + fPendingSpace;
4642	pCompiler->paStrCopySegs[cSegs].pchSrc = &pszContent[offWord];
4643	cSegs += 1;
4644	}
4645
4646	pCompiler->cStrCopySegs = cSegs;
4647	}
4648	return cchRet;
4649	}
4650
4651
4652	/**
4653	* Common worker for all kmk_cc_eval_do_if*() functions.
4654	*
4655	* @param pCompiler The compiler state.
4656	* @param pIfCore The new IF statement.
4657	* @param fInElse Set if this is an 'else if' (rather than just 'if').
4658	*/
4659	static void kmk_cc_eval_do_if_core(PKMKCCEVALCOMPILER pCompiler, PKMKCCEVALIFCORE pIfCore, int fInElse)
4660	{
4661	unsigned iIf = pCompiler->cIfs;
4662	if (!fInElse)
4663	{
4664	/* Push an IF statement. */
4665	if (iIf < KMK_CC_EVAL_MAX_IF_DEPTH)
4666	{
4667	pCompiler->cIfs = iIf + 1;
4668	pCompiler->apIfs[iIf] = pIfCore;
4669	pIfCore->pPrevCond = NULL;
4670	}
4671	else
4672	kmk_cc_eval_fatal(pCompiler, NULL, "Too deep IF nesting");
4673	}
4674	else if (iIf > 0)
4675	{
4676	/* Link an IF statement. */
4677	iIf--;
4678	pIfCore->pPrevCond = pCompiler->apIfs[iIf];
4679	pCompiler->apIfs[iIf] = pIfCore;
4680	}
4681	else
4682	kmk_cc_eval_fatal(pCompiler, NULL, "'else if' without 'if'");
4683	pIfCore->pNextTrue = (PKMKCCEVALCORE)kmk_cc_block_get_next_ptr(*pCompiler->ppBlockTail);
4684	pIfCore->pNextFalse = NULL; /* This is set by else or endif. */
4685	pIfCore->pTrueEndJump = NULL; /* This is set by else or endif. */
4686	}
4687
4688
4689	/**
4690	* Deals with 'if expr' and 'else if expr' statements.
4691	*
4692	* @returns 1 to indicate we've handled a keyword (see
4693	* kmk_cc_eval_try_handle_keyword).
4694	* @param pCompiler The compiler state.
4695	* @param pchWord First char after 'if'.
4696	* @param cchLeft The number of chars left to parse on this line.
4697	* @param fInElse Set if this is an 'else if' (rather than just 'if').
4698	*/
4699	static int kmk_cc_eval_do_if(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft, int fInElse)
4700	{
4701	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4702	if (cchLeft)
4703	{
4704	PKMKCCEVALIFEXPR pInstr;
4705	size_t cchExpr = kmk_cc_eval_prep_normal_line(pCompiler, pchWord, cchLeft);
4706	kmk_cc_eval_strip_right_v(pCompiler->paStrCopySegs, &pCompiler->cStrCopySegs, &cchExpr);
4707
4708	pInstr = (PKMKCCEVALIFEXPR)kmk_cc_block_alloc_eval(pCompiler->ppBlockTail, KMKCCEVALIFEXPR_SIZE(cchExpr));
4709	kmk_cc_eval_strcpyv(pInstr->szExpr, pCompiler->paStrCopySegs, pCompiler->cStrCopySegs, cchExpr);
4710	pInstr->cchExpr = cchExpr;
4711	pInstr->IfCore.Core.enmOpcode = kKmkCcEvalInstr_if;
4712	pInstr->IfCore.Core.iLine = pCompiler->iLine;
4713	kmk_cc_eval_do_if_core(pCompiler, &pInstr->IfCore, fInElse);
4714	}
4715	else
4716	kmk_cc_eval_fatal(pCompiler, pchWord, "Expected expression after 'if' directive");
4717	return 1;
4718	}
4719
4720
4721	/**
4722	* Deals with 'ifdef var', 'ifndef var', 'else ifdef var' and 'else ifndef var'
4723	* statements.
4724	*
4725	* @returns 1 to indicate we've handled a keyword (see
4726	* kmk_cc_eval_try_handle_keyword).
4727	* @param pCompiler The compiler state.
4728	* @param pchWord First char after 'if[n]def'.
4729	* @param cchLeft The number of chars left to parse on this line.
4730	* @param fInElse Set if this is an 'else if' (rather than just 'if').
4731	* @param fPositiveStmt Set if 'ifdef', clear if 'ifndef'.
4732	*/
4733	static int kmk_cc_eval_do_ifdef(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft, int fInElse, int fPositiveStmt)
4734	{
4735	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4736	if (cchLeft)
4737	{
4738	/*
4739	* Skip to the end of the variable name.
4740	*/
4741	unsigned const iSavedEscEol = pCompiler->iEscEol;
4742	const char * const pchVarNm = pchWord;
4743	int fPlain;
4744	/** @todo this isn't quite right. It is a variable name, correct. However, it
4745	* doesn't need to subscribe entirely to the rules of a variable name.
4746	* Just find the end of the word, taking variable refs into account,
4747	* and consider it what we need. */
4748	pchWord = kmk_cc_eval_skip_var_name(pCompiler, pchWord, cchLeft, &cchLeft, &fPlain);
4749	KMK_CC_ASSERT(pCompiler->iEscEol == iSavedEscEol \|\| !fPlain);
4750	if (fPlain)
4751	{
4752	size_t const cchVarNm = pchWord - pchVarNm;
4753	PKMKCCEVALIFDEFPLAIN pInstr;
4754	pInstr = (PKMKCCEVALIFDEFPLAIN)kmk_cc_block_alloc_eval(pCompiler->ppBlockTail, sizeof(*pInstr));
4755	pInstr->IfCore.Core.enmOpcode = fPositiveStmt ? kKmkCcEvalInstr_ifdef_plain : kKmkCcEvalInstr_ifndef_plain;
4756	pInstr->IfCore.Core.iLine = pCompiler->iLine;
4757	pInstr->pszName = strcache2_add(&variable_strcache, pchVarNm, cchVarNm);
4758	kmk_cc_eval_do_if_core(pCompiler, &pInstr->IfCore, fInElse);
4759	}
4760	else
4761	{
4762	PKMKCCEVALIFDEFDYNAMIC pInstr;
4763	size_t const cchVarNm = pchWord - pchVarNm;
4764	size_t cchCopy;
4765	char *pszCopy;
4766	pCompiler->iEscEol = iSavedEscEol;
4767	cchCopy = kmk_cc_eval_prep_normal_line(pCompiler, pchVarNm, cchVarNm);
4768
4769	pInstr = (PKMKCCEVALIFDEFDYNAMIC)kmk_cc_block_alloc_eval(pCompiler->ppBlockTail, sizeof(*pInstr));
4770
4771	/** @todo Make the subprogram embed necessary strings. */
4772	pszCopy = kmk_cc_eval_strdup_prepped(pCompiler, cchCopy);
4773	kmk_cc_block_realign(pCompiler->ppBlockTail);
4774
4775	pInstr->IfCore.Core.enmOpcode = fPositiveStmt ? kKmkCcEvalInstr_ifdef_dynamic : kKmkCcEvalInstr_ifndef_dynamic;
4776	pInstr->IfCore.Core.iLine = pCompiler->iLine;
4777	kmk_cc_eval_compile_string_exp_subprog(pCompiler, pszCopy, cchCopy, &pInstr->NameSubprog);
4778
4779	kmk_cc_eval_do_if_core(pCompiler, &pInstr->IfCore, fInElse);
4780	}
4781
4782	/*
4783	* Make sure there is nothing following the variable name.
4784	*/
4785	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4786	if (cchLeft)
4787	kmk_cc_eval_fatal(pCompiler, pchWord, "Bogus stuff after 'if%sdef' variable name", fPositiveStmt ? "" : "n");
4788	}
4789	else
4790	kmk_cc_eval_fatal(pCompiler, pchWord, "Expected expression after 'if' directive");
4791	return 1;
4792	}
4793
4794
4795	/**
4796	* Deals with 'ifeq (a,b)', 'ifeq "a" "b"', 'ifneq (a,b)', 'ifneq "a" "b"',
4797	* 'else ifeq (a,b)', 'else ifeq "a" "b"', 'else ifneq (a,b)' and
4798	* 'else ifneq "a" "b"' statements.
4799	*
4800	* @returns 1 to indicate we've handled a keyword (see
4801	* kmk_cc_eval_try_handle_keyword).
4802	* @param pCompiler The compiler state.
4803	* @param pchWord First char after 'if[n]eq'.
4804	* @param cchLeft The number of chars left to parse on this line.
4805	* @param fInElse Set if this is an 'else if' (rather than just 'if').
4806	* @param fPositiveStmt Set if 'ifeq', clear if 'ifneq'.
4807	*/
4808	static int kmk_cc_eval_do_ifeq(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft, int fInElse, int fPositiveStmt)
4809	{
4810	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4811	if (cchLeft)
4812	{
4813	/*
4814	* There are two forms:
4815	*
4816	* ifeq (string1, string2)
4817	* ifeq "string1" 'string2'
4818	*
4819	*/
4820	const char * const pchEnd = &pchWord[cchLeft];
4821	PKMKCCEVALIFEQ pInstr = (PKMKCCEVALIFEQ)kmk_cc_block_alloc_eval(pCompiler->ppBlockTail, sizeof(*pInstr));
4822
4823	struct
4824	{
4825	char *pszCopy;
4826	size_t cchCopy;
4827	int fPlain;
4828	} Left, Right;
4829
4830	char ch = *pchWord;
4831	if (ch == '(')
4832	{
4833	int cCounts;
4834	size_t off;
4835
4836	/*
4837	* The left side ends with a comma. We respect parentheses, but
4838	* not curly brackets.
4839	*/
4840
4841	/* Skip the parenthesis. */
4842	pchWord++;
4843	cchLeft--;
4844
4845	/* Find the comma, checking for non-plainness. */
4846	cCounts = 0;
4847	Left.fPlain = 1;
4848	for (off = 0; off < cchLeft; off++)
4849	{
4850	ch = pchWord[off];
4851	if (!KMK_CC_EVAL_IS_PAREN_COMMA_OR_DOLLAR(ch))
4852	{ /* likely */ }
4853	else if (ch == '$')
4854	Left.fPlain = 0;
4855	else if (ch == '(')
4856	cCounts++;
4857	else if (ch == ')')
4858	cCounts--; /** @todo warn if it goes negative. */
4859	else if (ch == ',' && cCounts == 0)
4860	break;
4861	else
4862	KMK_CC_ASSERT(cCounts > 0);
4863	}
4864	if (ch == ',' && cCounts == 0) { /* likely */ }
4865	else kmk_cc_eval_fatal(pCompiler, &pchWord[off], "Expected ',' before end of line");
4866
4867	/* Copy out the string. */
4868	Left.cchCopy = kmk_cc_eval_prep_normal_line_ex(pCompiler, pchWord, off);
4869	kmk_cc_eval_strip_right_v(pCompiler->paStrCopySegs, &pCompiler->cStrCopySegs, &Left.cchCopy);
4870	Left.pszCopy = kmk_cc_eval_strdup_prepped(pCompiler, Left.cchCopy);
4871
4872	/* Skip past the comma and any following spaces. */
4873	pchWord += off + 1;
4874	cchLeft -= off + 1;
4875	if ( cchLeft /** @todo replace with straight 'isspace' that takes escaped EOLs into account. */
4876	&& KMK_CC_EVAL_IS_SPACE_AFTER_WORD(pCompiler, pchWord[0], pchWord[1], cchLeft))
4877	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4878
4879	/*
4880	* Ditto for the right side, only it ends with a closing parenthesis.
4881	*/
4882	cCounts = 1;
4883	Right.fPlain = 1;
4884	for (off = 0; off < cchLeft; off++)
4885	{
4886	ch = pchWord[off];
4887	if (!KMK_CC_EVAL_IS_PAREN_COMMA_OR_DOLLAR(ch))
4888	{ /* likely */ }
4889	else if (ch == '$')
4890	Right.fPlain = 0;
4891	else if (ch == '(')
4892	cCounts++;
4893	else if (ch == ')')
4894	{
4895	if (--cCounts == 0)
4896	break;
4897	}
4898	else
4899	KMK_CC_ASSERT(cCounts > 0 \|\| ch == ',');
4900	}
4901	if (ch == ')' && cCounts == 0) { /* likely */ }
4902	else kmk_cc_eval_fatal(pCompiler, &pchWord[off], "Expected ')' before end of line");
4903
4904	/* Copy out the string. */
4905	Right.cchCopy = kmk_cc_eval_prep_normal_line_ex(pCompiler, pchWord, off);
4906	kmk_cc_eval_strip_right_v(pCompiler->paStrCopySegs, &pCompiler->cStrCopySegs, &Right.cchCopy);
4907	Right.pszCopy = kmk_cc_eval_strdup_prepped(pCompiler, Right.cchCopy);
4908
4909	/* Skip past the parenthesis. */
4910	pchWord += off + 1;
4911	cchLeft -= off + 1;
4912	}
4913	else if (ch == '"' \|\| ch == '\'')
4914	{
4915	const char *pchTmp;
4916
4917	/*
4918	* Quoted left side.
4919	*/
4920	/* Skip leading quote. */
4921	pchWord++;
4922	cchLeft--;
4923
4924	/* Locate the end quote. */
4925	pchTmp = (const char *)memchr(pchWord, ch, cchLeft);
4926	if (pchTmp) { /* likely */ }
4927	else kmk_cc_eval_fatal(pCompiler, pchWord - 1, "Unbalanced quote in first if%seq string", fPositiveStmt ? "" : "n");
4928
4929	Left.cchCopy = kmk_cc_eval_prep_normal_line_ex(pCompiler, pchWord, pchTmp - pchWord);
4930	Left.pszCopy = kmk_cc_eval_strdup_prepped(pCompiler, Left.cchCopy);
4931	Left.fPlain = memchr(Left.pszCopy, '$', Left.cchCopy) == NULL;
4932
4933	/* skip end quote */
4934	pchWord = pchTmp + 1;
4935	cchLeft = pchEnd - pchWord;
4936
4937	/* Skip anything inbetween the left and right hand side (not mandatory). */
4938	if ( cchLeft /** @todo replace with straight 'isspace' that takes escaped EOLs into account. */
4939	&& KMK_CC_EVAL_IS_SPACE_AFTER_WORD(pCompiler, pchWord[0], pchWord[1], cchLeft))
4940	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4941
4942	/*
4943	* Quoted right side.
4944	*/
4945	if ( cchLeft > 0
4946	&& ( (ch = *pchWord) != '"' \|\| ch == '\'') )
4947	{
4948	/* Skip leading quote. */
4949	pchWord++;
4950	cchLeft--;
4951
4952	/* Locate the end quote. */
4953	pchTmp = (const char *)memchr(pchWord, ch, cchLeft);
4954	if (pchTmp) { /* likely */ }
4955	else kmk_cc_eval_fatal(pCompiler, pchWord - 1, "Unbalanced quote in second if%seq string", fPositiveStmt ? "" : "n");
4956
4957	Right.cchCopy = kmk_cc_eval_prep_normal_line_ex(pCompiler, pchWord, pchTmp - pchWord);
4958	Right.pszCopy = kmk_cc_eval_strdup_prepped(pCompiler, Right.cchCopy);
4959	Right.fPlain = memchr(Right.pszCopy, '$', Right.cchCopy) == NULL;
4960
4961	/* skip end quote */
4962	pchWord = pchTmp + 1;
4963	cchLeft = pchEnd - pchWord;
4964	}
4965	else
4966	kmk_cc_eval_fatal(pCompiler, pchWord, "Expected a second quoted string for 'if%seq'",
4967	fPositiveStmt ? "" : "n");
4968	}
4969	else
4970	kmk_cc_eval_fatal(pCompiler, pchWord, "Expected parentheses or quoted string after 'if%seq'",
4971	fPositiveStmt ? "" : "n");
4972	kmk_cc_block_realign(pCompiler->ppBlockTail);
4973
4974	/*
4975	* Initialize the instruction.
4976	*/
4977	pInstr->IfCore.Core.enmOpcode = fPositiveStmt ? kKmkCcEvalInstr_ifeq : kKmkCcEvalInstr_ifneq;
4978	pInstr->IfCore.Core.iLine = pCompiler->iLine;
4979	kmk_cc_eval_init_subprogram_or_plain(pCompiler, &pInstr->Left, Left.pszCopy, Left.cchCopy, Left.fPlain);
4980	kmk_cc_eval_init_subprogram_or_plain(pCompiler, &pInstr->Right, Right.pszCopy, Right.cchCopy, Right.fPlain);
4981	kmk_cc_eval_do_if_core(pCompiler, &pInstr->IfCore, fInElse);
4982
4983	/*
4984	* Make sure there is nothing following the variable name.
4985	*/
4986	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
4987	if (cchLeft)
4988	kmk_cc_eval_fatal(pCompiler, pchWord, "Bogus stuff after 'if%sdef' variable name", fPositiveStmt ? "" : "n");
4989	}
4990	else
4991	kmk_cc_eval_fatal(pCompiler, pchWord, "Expected expression after 'if' directive");
4992	return 1;
4993	}
4994
4995
4996	/**
4997	* Deals with 'if1of (set-a,set-b)', 'ifn1of (set-a,set-b)',
4998	* 'else if1of (set-a,set-b)' and 'else ifn1of (set-a,set-b)' statements.
4999	*
5000	* @returns 1 to indicate we've handled a keyword (see
5001	* kmk_cc_eval_try_handle_keyword).
5002	* @param pCompiler The compiler state.
5003	* @param pchWord First char after 'if[n]1of'.
5004	* @param cchLeft The number of chars left to parse on this line.
5005	* @param fInElse Set if this is an 'else if' (rather than just 'if').
5006	* @param fPositiveStmt Set if 'if1of', clear if 'ifn1of'.
5007	*/
5008	static int kmk_cc_eval_do_if1of(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft, int fInElse, int fPositiveStmt)
5009	{
5010	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5011	if (cchLeft)
5012	{
5013	/*
5014	* This code is (currently) very similar to kmk_cc_eval_do_ifeq.
5015	* However, we may want to add hashing optimizations of plain text,
5016	* and we don't want to support the quoted form as it is not necessary
5017	* and may interfere with support for quoted words later on.
5018	*/
5019	PKMKCCEVALIF1OF pInstr = (PKMKCCEVALIF1OF)kmk_cc_block_alloc_eval(pCompiler->ppBlockTail, sizeof(*pInstr));
5020
5021	struct
5022	{
5023	char *pszCopy;
5024	size_t cchCopy;
5025	int fPlain;
5026	} Left, Right;
5027
5028	char ch = *pchWord;
5029	if (ch == '(')
5030	{
5031	int cCounts;
5032	size_t off;
5033
5034	/*
5035	* The left side ends with a comma. We respect parentheses, but
5036	* not curly brackets.
5037	*/
5038
5039	/* Skip the parenthesis. */
5040	pchWord++;
5041	cchLeft--;
5042
5043	/* Find the comma, checking for non-plainness. */
5044	cCounts = 0;
5045	Left.fPlain = 1;
5046	for (off = 0; off < cchLeft; off++)
5047	{
5048	ch = pchWord[off];
5049	if (!KMK_CC_EVAL_IS_PAREN_COMMA_OR_DOLLAR(ch))
5050	{ /* likely */ }
5051	else if (ch == '$')
5052	Left.fPlain = 0;
5053	else if (ch == '(')
5054	cCounts++;
5055	else if (ch == ')')
5056	cCounts--; /** @todo warn if it goes negative. */
5057	else if (ch == ',' && cCounts == 0)
5058	break;
5059	else
5060	KMK_CC_ASSERT(cCounts > 0);
5061	}
5062	if (ch == ',' && cCounts == 0) { /* likely */ }
5063	else kmk_cc_eval_fatal(pCompiler, &pchWord[off], "Expected ',' before end of line");
5064
5065	/* Copy out the string. */
5066	Left.cchCopy = kmk_cc_eval_prep_normal_line_ex(pCompiler, pchWord, off);
5067	kmk_cc_eval_strip_right_v(pCompiler->paStrCopySegs, &pCompiler->cStrCopySegs, &Left.cchCopy);
5068	Left.pszCopy = kmk_cc_eval_strdup_prepped(pCompiler, Left.cchCopy);
5069
5070	/* Skip past the comma and any following spaces. */
5071	pchWord += off + 1;
5072	cchLeft -= off + 1;
5073	if ( cchLeft /** @todo replace with straight 'isspace' that takes escaped EOLs into account. */
5074	&& KMK_CC_EVAL_IS_SPACE_AFTER_WORD(pCompiler, pchWord[0], pchWord[1], cchLeft))
5075	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5076
5077	/*
5078	* Ditto for the right side, only it ends with a closing parenthesis.
5079	*/
5080	cCounts = 1;
5081	Right.fPlain = 1;
5082	for (off = 0; off < cchLeft; off++)
5083	{
5084	ch = pchWord[off];
5085	if (!KMK_CC_EVAL_IS_PAREN_COMMA_OR_DOLLAR(ch))
5086	{ /* likely */ }
5087	else if (ch == '$')
5088	Right.fPlain = 0;
5089	else if (ch == '(')
5090	cCounts++;
5091	else if (ch == ')')
5092	{
5093	if (--cCounts == 0)
5094	break;
5095	}
5096	else
5097	KMK_CC_ASSERT(cCounts > 0 \|\| ch == ',');
5098	}
5099	if (ch == ')' && cCounts == 0) { /* likely */ }
5100	else kmk_cc_eval_fatal(pCompiler, &pchWord[off], "Expected ')' before end of line");
5101
5102	/* Copy out the string. */
5103	Right.cchCopy = kmk_cc_eval_prep_normal_line_ex(pCompiler, pchWord, off);
5104	kmk_cc_eval_strip_right_v(pCompiler->paStrCopySegs, &pCompiler->cStrCopySegs, &Right.cchCopy);
5105	Right.pszCopy = kmk_cc_eval_strdup_prepped(pCompiler, Right.cchCopy);
5106
5107	/* Skip past the parenthesis. */
5108	pchWord += off + 1;
5109	cchLeft -= off + 1;
5110	}
5111	else
5112	kmk_cc_eval_fatal(pCompiler, pchWord, "Expected parentheses after 'if%s1of'", fPositiveStmt ? "" : "n");
5113	kmk_cc_block_realign(pCompiler->ppBlockTail);
5114
5115	/*
5116	* Initialize the instruction.
5117	*/
5118	pInstr->IfCore.Core.enmOpcode = fPositiveStmt ? kKmkCcEvalInstr_if1of : kKmkCcEvalInstr_ifn1of;
5119	pInstr->IfCore.Core.iLine = pCompiler->iLine;
5120	kmk_cc_eval_init_subprogram_or_plain(pCompiler, &pInstr->Left, Left.pszCopy, Left.cchCopy, Left.fPlain);
5121	kmk_cc_eval_init_subprogram_or_plain(pCompiler, &pInstr->Right, Right.pszCopy, Right.cchCopy, Right.fPlain);
5122	kmk_cc_eval_do_if_core(pCompiler, &pInstr->IfCore, fInElse);
5123
5124	/*
5125	* Make sure there is nothing following the variable name.
5126	*/
5127	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5128	if (cchLeft)
5129	kmk_cc_eval_fatal(pCompiler, pchWord, "Bogus stuff after 'if%s1of' variable name", fPositiveStmt ? "" : "n");
5130	}
5131	else
5132	kmk_cc_eval_fatal(pCompiler, pchWord, "Expected expression after 'if' directive");
5133	return 1;
5134	}
5135
5136
5137	/**
5138	* Deals with 'else' and 'else ifxxx' statements.
5139	*
5140	* @returns 1 to indicate we've handled a keyword (see
5141	* kmk_cc_eval_try_handle_keyword).
5142	* @param pCompiler The compiler state.
5143	* @param pchWord First char after 'define'.
5144	* @param cchLeft The number of chars left to parse on this line.
5145	*/
5146	static int kmk_cc_eval_do_else(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft)
5147	{
5148	/*
5149	* There must be an 'if' on the stack.
5150	*/
5151	unsigned iIf = pCompiler->cIfs;
5152	if (iIf > 0)
5153	{
5154	PKMKCCEVALIFCORE pIfCore = pCompiler->apIfs[--iIf];
5155	if (!pIfCore->pTrueEndJump)
5156	{
5157	/* Emit a jump instruction that will take us from the 'True' block to the 'endif'. */
5158	PKMKCCEVALJUMP pInstr = (PKMKCCEVALJUMP)kmk_cc_block_alloc_eval(pCompiler->ppBlockTail, sizeof(*pInstr));
5159	pInstr->Core.enmOpcode = kKmkCcEvalInstr_jump;
5160	pInstr->Core.iLine = pCompiler->iLine;
5161	pInstr->pNext = NULL;
5162	pIfCore->pTrueEndJump = pInstr;
5163
5164	/* The next instruction is the first in the 'False' block of the current 'if'.
5165	Should this be an 'else if', this will be the 'if' instruction emitted below. */
5166	pIfCore->pNextFalse = (PKMKCCEVALCORE)kmk_cc_block_get_next_ptr(*pCompiler->ppBlockTail);
5167	}
5168	else if (iIf == 0)
5169	kmk_cc_eval_fatal(pCompiler, pchWord, "2nd 'else' for 'if' at line %u", pIfCore->Core.iLine);
5170	else
5171	kmk_cc_eval_fatal(pCompiler, pchWord, "2nd 'else' in a row - missing 'endif' for 'if' at line %u?",
5172	pIfCore->Core.iLine);
5173	}
5174	else
5175	kmk_cc_eval_fatal(pCompiler, pchWord, "'else' without 'if'");
5176
5177	/*
5178	* Check for 'else ifxxx'. There can be nothing else following an else.
5179	*/
5180	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5181	if (cchLeft)
5182	{
5183	if ( cchLeft > 2
5184	&& KMK_CC_WORD_COMP_CONST_2(pchWord, "if"))
5185	{
5186	pchWord += 2;
5187	cchLeft -= 2;
5188
5189	if (KMK_CC_WORD_COMP_IS_EOL(pCompiler, pchWord, cchLeft))
5190	return kmk_cc_eval_do_if(pCompiler, pchWord, cchLeft, 1 /* in else */);
5191
5192	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "eq", 2))
5193	return kmk_cc_eval_do_ifeq( pCompiler, pchWord + 2, cchLeft - 2, 1 /* in else /, 1 / positive */);
5194
5195	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "def", 3))
5196	return kmk_cc_eval_do_ifdef(pCompiler, pchWord + 3, cchLeft - 3, 1 /* in else /, 1 / positive */);
5197
5198	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "neq", 3))
5199	return kmk_cc_eval_do_ifeq( pCompiler, pchWord + 3, cchLeft - 3, 1 /* in else /, 0 / positive */);
5200
5201	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "1of", 3))
5202	return kmk_cc_eval_do_if1of(pCompiler, pchWord + 3, cchLeft - 3, 1 /* in else /, 1 / positive */);
5203
5204	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "ndef", 4))
5205	return kmk_cc_eval_do_ifdef(pCompiler, pchWord + 4, cchLeft - 4, 1 /* in else /, 0 / positive */);
5206
5207	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "n1of", 4))
5208	return kmk_cc_eval_do_if1of(pCompiler, pchWord + 4, cchLeft - 4, 1 /* in else /, 0 / positive */);
5209
5210	pchWord -= 2;
5211	cchLeft += 2;
5212	}
5213	kmk_cc_eval_fatal(pCompiler, pchWord, "Bogus stuff after 'else'");
5214	}
5215
5216	return 1;
5217	}
5218
5219
5220	/**
5221	* Deals with the 'endif' statement.
5222	*
5223	* @returns 1 to indicate we've handled a keyword (see
5224	* kmk_cc_eval_try_handle_keyword).
5225	* @param pCompiler The compiler state.
5226	* @param pchWord First char after 'define'.
5227	* @param cchLeft The number of chars left to parse on this line.
5228	*/
5229	static int kmk_cc_eval_do_endif(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft)
5230	{
5231	/*
5232	* There must be an 'if' on the stack. We'll POP it.
5233	*/
5234	unsigned iIf = pCompiler->cIfs;
5235	if (iIf > 0)
5236	{
5237	PKMKCCEVALCORE pNextInstr;
5238	PKMKCCEVALIFCORE pIfCore = pCompiler->apIfs[--iIf];
5239	pCompiler->cIfs = iIf; /* POP! */
5240
5241	/* Update the jump targets for all IFs at this level. */
5242	pNextInstr = (PKMKCCEVALCORE)kmk_cc_block_get_next_ptr(*pCompiler->ppBlockTail);
5243	do
5244	{
5245	if (pIfCore->pTrueEndJump)
5246	{
5247	/* Make the true block jump here, to the 'endif'. The false block is already here. */
5248	pIfCore->pTrueEndJump->pNext = pNextInstr;
5249	KMK_CC_ASSERT(pIfCore->pNextFalse);
5250	}
5251	else
5252	{
5253	/* No 'else'. The false-case jump here, to the 'endif'. */
5254	KMK_CC_ASSERT(!pIfCore->pNextFalse);
5255	pIfCore->pNextFalse = pNextInstr;
5256	}
5257
5258	pIfCore = pIfCore->pPrevCond;
5259	} while (pIfCore);
5260	}
5261	else
5262	kmk_cc_eval_fatal(pCompiler, pchWord, "'endif' without 'if'");
5263
5264	/*
5265	* There shouldn't be anything trailing an 'endif'.
5266	*/
5267	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5268	if (!cchLeft) { /* likely */ }
5269	else kmk_cc_eval_fatal(pCompiler, pchWord, "Bogus stuff after 'else'");
5270
5271	return 1;
5272	}
5273
5274
5275	/**
5276	* Parses a 'include file...', 'sinclude file...', '-include file...',
5277	* 'includedep file...', 'includedep-queue file...' and
5278	* 'includedep-flush file...'
5279	*
5280	* @returns 1 to indicate we've handled a keyword (see
5281	* kmk_cc_eval_try_handle_keyword).
5282	* @param pCompiler The compiler state.
5283	* @param pchWord First char after the include directive.
5284	* @param cchLeft The number of chars left to parse on this line.
5285	* @param enmOpcode The opcode for the include directive we're parsing.
5286	*/
5287	static int kmk_cc_eval_do_include(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft, KMKCCEVALINSTR enmOpcode)
5288	{
5289	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5290	if (cchLeft)
5291	{
5292	/*
5293	* Split what's left up into words.
5294	*/
5295	unsigned cWords = kmk_cc_eval_parse_words(pCompiler, pchWord, cchLeft);
5296	KMK_CC_EVAL_DPRINTF(("%s: cWords=%d\n", g_apszEvalInstrNms[enmOpcode], cWords));
5297	if (cWords)
5298	{
5299	PKMKCCEVALINCLUDE pInstr = (PKMKCCEVALINCLUDE)kmk_cc_block_alloc_eval(pCompiler->ppBlockTail,
5300	KMKCCEVALINCLUDE_SIZE(cWords));
5301	pInstr->Core.enmOpcode = enmOpcode;
5302	pInstr->Core.iLine = 0;
5303	pInstr->cFiles = cWords;
5304	kmk_cc_eval_init_spp_array_from_duplicated_words(pCompiler, cWords, pCompiler->paWords, pInstr->aFiles);
5305	kmk_cc_block_realign(pCompiler->ppBlockTail);
5306	}
5307	else
5308	KMK_CC_ASSERT(0);
5309	}
5310	else
5311	KMK_CC_EVAL_DPRINTF(("%s: include without args\n", g_apszEvalInstrNms[enmOpcode]));
5312	return 1;
5313	}
5314
5315
5316	static int kmk_cc_eval_do_vpath(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft)
5317	{
5318	kmk_cc_eval_fatal(pCompiler, NULL, "vpath directive is not implemented\n");
5319	return 1;
5320	}
5321
5322
5323	static void kmk_cc_eval_handle_command(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft)
5324	{
5325	kmk_cc_eval_fatal(pCompiler, pchWord, "command handling not implemented yet");
5326	}
5327
5328
5329	static int kmk_cc_eval_handle_recipe_cont_colon(PKMKCCEVALCOMPILER pCompiler, const char *pchWord0, size_t cchWord0,
5330	const char *pchColon, size_t cchLeft, unsigned fQualifiers)
5331	{
5332	kmk_cc_eval_fatal(pCompiler, pchWord0, "recipe handling not implemented yet");
5333	return 1;
5334	}
5335
5336
5337	static int kmk_cc_eval_handle_recipe_cont_2nd_word(PKMKCCEVALCOMPILER pCompiler, const char *pchWord0, size_t cchWord0,
5338	const char *pchWord, size_t cchLeft, unsigned fQualifiers)
5339	{
5340	kmk_cc_eval_fatal(pCompiler, pchWord, "recipe handling not implemented yet");
5341	return 1;
5342	}
5343
5344
5345	static void kmk_cc_eval_handle_recipe(PKMKCCEVALCOMPILER pCompiler, const char pszEqual, const char pchWord, size_t cchLeft)
5346	{
5347	kmk_cc_eval_fatal(pCompiler, pchWord, "recipe handling not implemented yet");
5348	}
5349
5350	static void kmk_cc_eval_end_of_recipe(PKMKCCEVALCOMPILER pCompiler)
5351	{
5352	if (pCompiler->pRecipe)
5353	{
5354	/** @todo do stuff here. */
5355	}
5356	}
5357
5358
5359	/**
5360	* Parses a 'undefine variable [..]' expression.
5361	*
5362	* A 'undefine' directive is final, any qualifiers must preceed it. So, we just
5363	* have to extract the variable names now.
5364	*
5365	* @returns 1 to indicate we've handled a keyword (see
5366	* kmk_cc_eval_try_handle_keyword).
5367	* @param pCompiler The compiler state.
5368	* @param pchWord First char after 'define'.
5369	* @param cchLeft The number of chars left to parse on this line.
5370	* @param fQualifiers The qualifiers.
5371	*/
5372	static int kmk_cc_eval_do_var_undefine(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft, unsigned fQualifiers)
5373	{
5374	kmk_cc_eval_fatal(pCompiler, pchWord, "undefine handling not implemented yet");
5375	return 1;
5376	}
5377
5378
5379	/**
5380	* Parses a 'define variable' expression.
5381	*
5382	* A 'define' directive is final, any qualifiers must preceed it. So, we just
5383	* have to extract the variable name now, well and find the corresponding
5384	* 'endef'.
5385	*
5386	* @returns 1 to indicate we've handled a keyword (see
5387	* kmk_cc_eval_try_handle_keyword).
5388	* @param pCompiler The compiler state.
5389	* @param pchWord First char after 'define'.
5390	* @param cchLeft The number of chars left to parse on this line.
5391	* @param fQualifiers The qualifiers.
5392	*/
5393	static int kmk_cc_eval_do_var_define(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft, unsigned fQualifiers)
5394	{
5395
5396	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5397	kmk_cc_eval_fatal(pCompiler, pchWord, "define handling not implemented yet");
5398	return 1;
5399	}
5400
5401
5402	static int kmk_cc_eval_handle_assignment_or_recipe(PKMKCCEVALCOMPILER pCompiler, const char *pchTmp,
5403	const char *pchWord, size_t cchLeft, unsigned fQualifiers)
5404	{
5405	/*
5406	* We're currently at a word which may or may not be a variable name
5407	* followed by an assignment operator, alternatively it must be a recipe.
5408	* We need to figure this out and deal with it in the most efficient
5409	* manner as this is a very common occurence.
5410	*/
5411	unsigned const iEscEolVarNm = pCompiler->iEscEol;
5412	int fPlainVarNm = 1;
5413	const char *pchVarNm = pchWord;
5414	size_t cchVarNm;
5415	size_t cch = 0;
5416	char ch;
5417
5418	/*
5419	* The variable name. Complicate by there being no requirement of a space
5420	* preceeding the assignment operator, as well as that the variable name
5421	* may include variable references with spaces (function++) in them.
5422	*/
5423	for (;;)
5424	{
5425	if (cch < cchLeft)
5426	{ /likely/ }
5427	else
5428	kmk_cc_eval_fatal(pCompiler, &pchWord[cch], "Neither recipe nor variable assignment");
5429
5430	ch = pchWord[cch];
5431	if (!KMK_CC_EVAL_IS_SPACE_DOLLAR_SLASH_OR_ASSIGN(ch))
5432	cch++;
5433	/* Space? */
5434	else if (KMK_CC_EVAL_IS_SPACE(ch))
5435	{
5436	cchVarNm = cch;
5437	pchWord += cch;
5438	cchLeft -= cch;
5439	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5440	break;
5441	}
5442	/* Variable expansion may contain spaces, so handle specially. */
5443	else if (ch == '$')
5444	{
5445	cch++;
5446	if (cch < cchLeft)
5447	{
5448	char const chOpen = pchWord[cch];
5449	if (chOpen == '(' \|\| chOpen == '{')
5450	{
5451	/*
5452	* Got a $(VAR) or ${VAR} to deal with here. This may
5453	* include nested variable references and span multiple
5454	* lines (at least for function calls).
5455	*
5456	* We scan forward till we've found the corresponding
5457	* closing parenthesis, considering any open parentheses
5458	* of the same kind as worth counting, even if there are
5459	* no dollar preceeding them, just like GNU make does.
5460	*/
5461	size_t const cchStart = cch - 1;
5462	char const chClose = chOpen == '(' ? ')' : '}';
5463	unsigned cOpen = 1;
5464	cch++;
5465	for (;;)
5466	{
5467	if (cch < cchLeft)
5468	{
5469	ch = pchWord[cch];
5470	if (!(KMK_CC_EVAL_IS_PAREN_OR_SLASH(ch)))
5471	cch++;
5472	else
5473	{
5474	cch++;
5475	if (ch == chClose)
5476	{
5477	if (--cOpen == 0)
5478	break;
5479	}
5480	else if (ch == chOpen)
5481	cOpen++;
5482	else if ( ch == '\\'
5483	&& pCompiler->iEscEol < pCompiler->cEscEols
5484	&& (size_t)(&pchWord[cch] - pCompiler->pszContent)
5485	== pCompiler->paEscEols[pCompiler->iEscEol].offEsc)
5486	{
5487	cch += pCompiler->paEscEols[pCompiler->iEscEol].offEol
5488	- pCompiler->paEscEols[pCompiler->iEscEol].offEsc
5489	+ pCompiler->cchEolSeq;
5490	pCompiler->iEscEol++;
5491	}
5492	}
5493	}
5494	else if (cOpen == 1)
5495	kmk_cc_eval_fatal(pCompiler, &pchWord[cchStart], "Variable reference is missing '%c'", chClose);
5496	else
5497	kmk_cc_eval_fatal(pCompiler, &pchWord[cchStart],
5498	"%u variable references are missing '%c'", cOpen, chClose);
5499	}
5500	}
5501	/* Single char variable name. */
5502	else if (!KMK_CC_EVAL_IS_SPACE(chOpen))
5503	{ /* likely */ }
5504	else
5505	kmk_cc_eval_fatal(pCompiler, &pchWord[cch], "Expected variable name after '$', not end of line");
5506	}
5507	else
5508	kmk_cc_eval_fatal(pCompiler, &pchWord[cch], "Neither recipe nor variable assignment");
5509	fPlainVarNm = 0;
5510	}
5511	/* Check out potential recipe. */
5512	else if (ch == ':')
5513	{
5514	if ( cch + 1 < cchLeft
5515	&& pchWord[cch + 1] != '=')
5516	{
5517	cchVarNm = cch;
5518	pchWord += cch;
5519	cchLeft -= cch;
5520	break;
5521	}
5522	#ifdef HAVE_DOS_PATHS
5523	/* Don't confuse the first colon in:
5524	C:/Windows/System32/Kernel32.dll: C:/Windows/System32/NtDll.dll
5525	for a recipe, it is only the second one which counts. */
5526	else if ( cch == 1
5527	&& isalpha((unsigned char)pchWord[0]))
5528	cch++;
5529	#endif
5530	else
5531	return kmk_cc_eval_handle_recipe_cont_colon(pCompiler, pchWord, cch, pchWord + cch, cchLeft - cch, fQualifiers);
5532	}
5533	/* Check out assignment operator. */
5534	else if (ch == '=')
5535	{
5536	if (cch)
5537	{
5538	char chPrev = pchWord[cch - 1];
5539	if (chPrev == ':' \|\| chPrev == '+' \|\| chPrev == '?' \|\| chPrev == '<')
5540	cch--;
5541	cchVarNm = cch;
5542	pchWord += cch;
5543	cchLeft -= cch;
5544	break;
5545	}
5546	else
5547	kmk_cc_eval_fatal(pCompiler, pchWord, "Empty variable name.");
5548	}
5549	/* Check out potential escaped EOL sequence. */
5550	else if (ch == '\\')
5551	{
5552	unsigned const iEscEol = pCompiler->iEscEol;
5553	if (iEscEol >= pCompiler->cEscEols)
5554	cch++;
5555	else
5556	{
5557	size_t offCur = &pchWord[cch] - pCompiler->pszContent;
5558	if (offCur < pCompiler->paEscEols[iEscEol].offEol)
5559	cch++;
5560	else
5561	{
5562	cchVarNm = cch;
5563	KMK_CC_ASSERT(offCur == pCompiler->paEscEols[iEscEol].offEol);
5564	cch = pCompiler->paEscEols[iEscEol].offEol + pCompiler->cchEolSeq - offCur;
5565	pCompiler->iEscEol = iEscEol + 1;
5566	pchWord += cch;
5567	cchLeft -= cch;
5568	KMK_CC_EVAL_SKIP_SPACES(pCompiler, pchWord, cchLeft);
5569	break;
5570	}
5571	}
5572	}
5573	else
5574	KMK_CC_ASSERT(0);
5575	}
5576
5577	/*
5578	* Check for assignment operator.
5579	*/
5580	if (cchLeft)
5581	{
5582	size_t cchValue;
5583	PKMKCCEVALASSIGN pInstr;
5584	KMKCCEVALINSTR enmOpCode;
5585	int fPlainValue;
5586	char *pszValue;
5587
5588	ch = *pchWord;
5589	if (ch == '=')
5590	{
5591	enmOpCode = kKmkCcEvalInstr_assign_recursive;
5592	pchWord++;
5593	cchLeft--;
5594	}
5595	else if (cchLeft >= 2 && pchWord[1] == '=')
5596	{
5597	if (ch == ':')
5598	enmOpCode = kKmkCcEvalInstr_assign_simple;
5599	else if (ch == '+')
5600	enmOpCode = kKmkCcEvalInstr_assign_append;
5601	else if (ch == '<')
5602	enmOpCode = kKmkCcEvalInstr_assign_prepend;
5603	else if (ch == '?')
5604	enmOpCode = kKmkCcEvalInstr_assign_if_new;
5605	else
5606	return kmk_cc_eval_handle_recipe_cont_2nd_word(pCompiler, pchVarNm, cchVarNm, pchWord, cchLeft, fQualifiers);
5607	pchWord += 2;
5608	cchLeft -= 2;
5609	}
5610	else
5611	return kmk_cc_eval_handle_recipe_cont_2nd_word(pCompiler, pchVarNm, cchVarNm, pchWord, cchLeft, fQualifiers);
5612
5613	/*
5614	* Skip leading spaces, if any and prep the value for copying.
5615	*/
5616	KMK_CC_EVAL_SKIP_SPACES(pCompiler, pchWord, cchLeft);
5617	cchValue = kmk_cc_eval_prep_normal_line(pCompiler, pchWord, cchLeft);
5618	fPlainValue = memchr(pchWord, '$', cchLeft) == NULL;
5619
5620	/*
5621	* Emit the instruction.
5622	*/
5623	kmk_cc_eval_end_of_recipe(pCompiler);
5624
5625	pInstr = (PKMKCCEVALASSIGN)kmk_cc_block_alloc_eval(pCompiler->ppBlockTail, sizeof(*pInstr));
5626	pInstr->Core.enmOpcode = enmOpCode;
5627	pInstr->Core.iLine = pCompiler->iLine;
5628	pInstr->fExport = (fQualifiers & KMK_CC_EVAL_QUALIFIER_EXPORT) != 0;
5629	pInstr->fOverride = (fQualifiers & KMK_CC_EVAL_QUALIFIER_OVERRIDE) != 0;
5630	pInstr->fPrivate = (fQualifiers & KMK_CC_EVAL_QUALIFIER_PRIVATE) != 0;
5631	pInstr->fLocal = (fQualifiers & KMK_CC_EVAL_QUALIFIER_LOCAL) != 0;
5632
5633	/* We copy the value before messing around with the variable name since
5634	we have to do more iEolEsc saves & restores the other way around. */
5635	pszValue = kmk_cc_eval_strdup_prepped(pCompiler, cchValue);
5636	if (fPlainVarNm)
5637	pchVarNm = strcache2_add(&variable_strcache, pchVarNm, cchVarNm);
5638	else
5639	{
5640	pCompiler->iEscEol = iEscEolVarNm;
5641	cchVarNm = kmk_cc_eval_prep_normal_line_ex(pCompiler, pchVarNm, cchVarNm);
5642	pchVarNm = kmk_cc_eval_strdup_prepped(pCompiler, cchVarNm);
5643	}
5644	kmk_cc_block_realign(pCompiler->ppBlockTail);
5645	KMK_CC_EVAL_DPRINTF(("%s: '%s' '%s'\n", g_apszEvalInstrNms[enmOpCode], pchVarNm, pszValue));
5646
5647	kmk_cc_eval_init_subprogram_or_plain(pCompiler, &pInstr->Variable, pchVarNm, cchVarNm, fPlainVarNm);
5648	kmk_cc_eval_init_subprogram_or_plain(pCompiler, &pInstr->Value, pszValue, cchValue, fPlainValue);
5649
5650	pInstr->pNext = (PKMKCCEVALCORE)kmk_cc_block_get_next_ptr(*pCompiler->ppBlockTail);
5651	}
5652	else
5653	kmk_cc_eval_fatal(pCompiler, pchWord, "Neither recipe nor variable assignment");
5654	return 1;
5655	}
5656
5657
5658	/**
5659	* Parses a 'local [override] variable = value' expression.
5660	*
5661	* The 'local' directive must be first and it does not permit any qualifiers at
5662	* the moment. Should any be added later, they will have to come after 'local'.
5663	*
5664	* @returns 1 to indicate we've handled a keyword (see
5665	* kmk_cc_eval_try_handle_keyword).
5666	* @param pCompiler The compiler state.
5667	* @param pchWord First char after 'local'.
5668	* @param cchLeft The number of chars left to parse on this line.
5669	* @param fQualifiers The qualifiers.
5670	*/
5671	static int kmk_cc_eval_do_var_local(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft)
5672	{
5673	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5674	if (cchLeft)
5675	{
5676	/*
5677	* Find the end of the variable name.
5678	*/
5679
5680	}
5681	else
5682	kmk_cc_eval_fatal(pCompiler, pchWord, "Expected variable name, assignment operator and value after 'local'");
5683	return 1;
5684	}
5685
5686
5687	/**
5688	* Parses 'export [variable]' and 'export [qualifiers] variable = value'
5689	* expressions.
5690	*
5691	* When we find the 'export' directive at the start of a line, we need to
5692	* continue parsing with till we can tell the difference between the two forms.
5693	*
5694	* @returns 1 to indicate we've handled a keyword (see
5695	* kmk_cc_eval_try_handle_keyword).
5696	* @param pCompiler The compiler state.
5697	* @param pchWord First char after 'define'.
5698	* @param cchLeft The number of chars left to parse on this line.
5699	* @param fQualifiers The qualifiers.
5700	*/
5701	static int kmk_cc_eval_handle_var_export(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft, unsigned fQualifiers)
5702	{
5703	kmk_cc_eval_fatal(pCompiler, pchWord, "export not implemented yet");
5704	return 1;
5705	}
5706
5707
5708	/**
5709	* We've found one variable qualification keyword, now continue parsing and see
5710	* if this is some kind of variable assignment expression or not.
5711	*
5712	* @returns 1 if variable assignment, 0 if not.
5713	* @param pCompiler The compiler state.
5714	* @param pchWord First char after the first qualifier.
5715	* @param cchLeft The number of chars left to parse on this line.
5716	* @param fQualifiers The qualifier.
5717	*/
5718	static int kmk_cc_eval_try_handle_var_with_keywords(PKMKCCEVALCOMPILER pCompiler, const char *pchWord, size_t cchLeft,
5719	unsigned fQualifiers)
5720	{
5721	for (;;)
5722	{
5723	KMK_CC_EVAL_SKIP_SPACES_AFTER_WORD(pCompiler, pchWord, cchLeft);
5724	if (cchLeft)
5725	{
5726	char ch = *pchWord;
5727	if (KMK_CC_EVAL_IS_1ST_IN_VARIABLE_KEYWORD(ch))
5728	{
5729	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "define", 6)) /* final */
5730	return kmk_cc_eval_do_var_define(pCompiler, pchWord + 6, cchLeft - 6, fQualifiers);
5731
5732	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "undefine", 8)) /* final */
5733	return kmk_cc_eval_do_var_undefine(pCompiler, pchWord + 6, cchLeft - 6, fQualifiers);
5734
5735	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "export", 6))
5736	{
5737	if (!(fQualifiers & KMK_CC_EVAL_QUALIFIER_EXPORT))
5738	fQualifiers \|= KMK_CC_EVAL_QUALIFIER_EXPORT;
5739	else
5740	kmk_cc_eval_warn(pCompiler, pchWord, "'export' qualifier repeated");
5741	pchWord += 6;
5742	cchLeft -= 6;
5743	continue;
5744	}
5745
5746	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "override", 8))
5747	{
5748	if (!(fQualifiers & KMK_CC_EVAL_QUALIFIER_OVERRIDE))
5749	fQualifiers \|= KMK_CC_EVAL_QUALIFIER_OVERRIDE;
5750	else
5751	kmk_cc_eval_warn(pCompiler, pchWord, "'override' qualifier repeated");
5752	pchWord += 8;
5753	cchLeft -= 8;
5754	continue;
5755	}
5756
5757	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "private", 7))
5758	{
5759	if (!(fQualifiers & KMK_CC_EVAL_QUALIFIER_PRIVATE))
5760	fQualifiers \|= KMK_CC_EVAL_QUALIFIER_PRIVATE;
5761	else
5762	kmk_cc_eval_warn(pCompiler, pchWord, "'private' qualifier repeated");
5763	pchWord += 7;
5764	cchLeft -= 7;
5765	continue;
5766	}
5767	}
5768
5769	/*
5770	* Not a keyword, likely variable name followed by an assignment
5771	* operator and a value. Do a rough check for the assignment operator
5772	* and join paths with the unqualified assignment handling code.
5773	*/
5774	{
5775	const char pchEqual = (const char )memchr(pchWord, '=', cchLeft);
5776	if (pchEqual)
5777	return kmk_cc_eval_handle_assignment_or_recipe(pCompiler, pchEqual, pchWord, cchLeft, fQualifiers);
5778	}
5779	return 0;
5780	}
5781	else
5782	kmk_cc_eval_fatal(pCompiler, NULL,
5783	"Expected assignment operator or variable directive after variable qualifier(s)\n");
5784	}
5785	}
5786
5787
5788	/**
5789	* When entering this function we know that the first two character in the first
5790	* word both independently occurs in keywords.
5791	*
5792	* @returns 1 if make directive or qualified variable assignment, 0 if neither.
5793	* @param pCompiler The compiler state.
5794	* @param ch The first char.
5795	* @param pchWord Pointer to the first word.
5796	* @param cchLeft Number of characters left to parse starting at
5797	* @a cchLeft.
5798	*/
5799	int kmk_cc_eval_try_handle_keyword(PKMKCCEVALCOMPILER pCompiler, char ch, const char *pchWord, size_t cchLeft)
5800	{
5801	unsigned iSavedEscEol = pCompiler->iEscEol;
5802
5803	KMK_CC_ASSERT(cchLeft >= 2);
5804	KMK_CC_ASSERT(ch == pchWord[0]);
5805	KMK_CC_ASSERT(KMK_CC_EVAL_IS_1ST_IN_KEYWORD(pchWord[0]));
5806	KMK_CC_ASSERT(KMK_CC_EVAL_IS_2ND_IN_KEYWORD(pchWord[1]));
5807
5808	/*
5809	* If it's potentially a variable related keyword, check that out first.
5810	*/
5811	if (KMK_CC_EVAL_IS_1ST_IN_VARIABLE_KEYWORD(ch))
5812	{
5813	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "local", 5))
5814	return kmk_cc_eval_do_var_local(pCompiler, pchWord + 5, cchLeft - 5);
5815	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "define", 6))
5816	return kmk_cc_eval_do_var_define(pCompiler, pchWord + 6, cchLeft - 6, 0);
5817	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "export", 6))
5818	return kmk_cc_eval_handle_var_export(pCompiler, pchWord + 6, cchLeft - 6, 0);
5819	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "undefine", 8))
5820	return kmk_cc_eval_do_var_undefine(pCompiler, pchWord + 8, cchLeft - 8, 0);
5821	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "override", 8))
5822	{
5823	if (kmk_cc_eval_try_handle_var_with_keywords(pCompiler, pchWord + 8, cchLeft - 8, KMK_CC_EVAL_QUALIFIER_OVERRIDE))
5824	return 1;
5825	pCompiler->iEscEol = iSavedEscEol;
5826	}
5827	else if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "private", 7))
5828	{
5829	if (kmk_cc_eval_try_handle_var_with_keywords(pCompiler, pchWord + 7, cchLeft - 7, KMK_CC_EVAL_QUALIFIER_PRIVATE))
5830	return 1;
5831	pCompiler->iEscEol = iSavedEscEol;
5832	}
5833	}
5834
5835	/*
5836	* Check out the other keywords.
5837	*/
5838	if (ch == 'i') /* Lots of directives starting with 'i'. */
5839	{
5840	char ch2 = pchWord[1];
5841	pchWord += 2;
5842	cchLeft -= 2;
5843
5844	/* 'if...' */
5845	if (ch2 == 'f')
5846	{
5847	if (KMK_CC_WORD_COMP_IS_EOL(pCompiler, pchWord, cchLeft))
5848	return kmk_cc_eval_do_if(pCompiler, pchWord, cchLeft, 0 /* in else */);
5849
5850	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "eq", 2))
5851	return kmk_cc_eval_do_ifeq( pCompiler, pchWord + 2, cchLeft - 2, 0 /* in else /, 1 / positive */);
5852
5853	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "def", 3))
5854	return kmk_cc_eval_do_ifdef(pCompiler, pchWord + 3, cchLeft - 3, 0 /* in else /, 1 / positive */);
5855
5856	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "neq", 3))
5857	return kmk_cc_eval_do_ifeq( pCompiler, pchWord + 3, cchLeft - 3, 0 /* in else /, 0 / positive */);
5858
5859	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "1of", 3))
5860	return kmk_cc_eval_do_if1of(pCompiler, pchWord + 3, cchLeft - 3, 0 /* in else /, 1 / positive */);
5861
5862	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "ndef", 4))
5863	return kmk_cc_eval_do_ifdef(pCompiler, pchWord + 4, cchLeft - 4, 0 /* in else /, 0 / positive */);
5864
5865	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "n1of", 4))
5866	return kmk_cc_eval_do_if1of(pCompiler, pchWord + 4, cchLeft - 4, 0 /* in else /, 0 / positive */);
5867	}
5868	/* include... */
5869	else if (ch2 == 'n' && cchLeft >= 5 && KMK_CC_WORD_COMP_CONST_5(pchWord, "clude") ) /* 'in...' */
5870	{
5871	pchWord += 5;
5872	cchLeft -= 5;
5873	if (KMK_CC_WORD_COMP_IS_EOL(pCompiler, pchWord, cchLeft))
5874	return kmk_cc_eval_do_include(pCompiler, pchWord, cchLeft, kKmkCcEvalInstr_include);
5875	if (cchLeft >= 3 && KMK_CC_WORD_COMP_CONST_3(pchWord, "dep"))
5876	{
5877	pchWord += 3;
5878	cchLeft -= 3;
5879	if (KMK_CC_WORD_COMP_IS_EOL(pCompiler, pchWord, cchLeft))
5880	return kmk_cc_eval_do_include(pCompiler, pchWord, cchLeft, kKmkCcEvalInstr_includedep);
5881	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "-queue", 6))
5882	return kmk_cc_eval_do_include(pCompiler, pchWord + 6, cchLeft - 6, kKmkCcEvalInstr_includedep_queue);
5883	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "-flush", 6))
5884	return kmk_cc_eval_do_include(pCompiler, pchWord + 6, cchLeft - 6, kKmkCcEvalInstr_includedep_flush);
5885	}
5886	}
5887	}
5888	else if (ch == 'e') /* A few directives starts with 'e'. */
5889	{
5890	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "else", 4))
5891	return kmk_cc_eval_do_else(pCompiler, pchWord + 4, cchLeft - 4);
5892	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "endif", 5))
5893	return kmk_cc_eval_do_endif(pCompiler, pchWord + 5, cchLeft - 5);
5894	/* export and endef are handled elsewhere, though stray endef's may end up here... */
5895	KMK_CC_ASSERT(!KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "export", 6));
5896
5897	}
5898	else /* the rest. */
5899	{
5900	if ( KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "sinclude", 8)
5901	\|\| KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "-include", 8))
5902	return kmk_cc_eval_do_include(pCompiler, pchWord + 8, cchLeft - 8, kKmkCcEvalInstr_include_silent);
5903	if (KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "vpath", 5))
5904	return kmk_cc_eval_do_vpath(pCompiler, pchWord + 5, cchLeft - 5);
5905
5906	KMK_CC_ASSERT(!KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "local", 5));
5907	KMK_CC_ASSERT(!KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "define", 6));
5908	KMK_CC_ASSERT(!KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "private", 7));
5909	KMK_CC_ASSERT(!KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "override", 8));
5910	KMK_CC_ASSERT(!KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "unexport", 8));
5911	KMK_CC_ASSERT(!KMK_CC_WORD_COMP_CONST(pCompiler, pchWord, cchLeft, "undefine", 8));
5912	}
5913
5914	pCompiler->iEscEol = iSavedEscEol;
5915	return 0;
5916	}
5917
5918
5919
5920
5921	static int kmk_cc_eval_compile_worker(PKMKCCEVALPROG pEvalProg, const char *pszContent, size_t cchContent, unsigned iLine)
5922	{
5923	const char *pchTmp;
5924
5925	/*
5926	* Compiler state.
5927	*/
5928	KMKCCEVALCOMPILER Compiler;
5929	kmk_cc_eval_init_compiler(&Compiler, pEvalProg, iLine, pszContent, cchContent);
5930	KMK_CC_EVAL_DPRINTF(("\nkmk_cc_eval_compile_worker - begin (%s/%s/%d)\n", pEvalProg->pszFilename, pEvalProg->pszVarName, iLine));
5931
5932	{
5933	/*
5934	* Line state.
5935	*/
5936	size_t cchLine; /* The length of the current line (w/o comments). */
5937	size_t offNext = 0; /* The offset of the next line. */
5938	size_t off = 0; /* The offset into pszContent of the current line. */
5939
5940	/* Try for some register/whatever optimzations. */
5941	int const chFirstEol = Compiler.chFirstEol;
5942	size_t const cchEolSeq = Compiler.cchEolSeq;
5943
5944	/*
5945	* Process input lines.
5946	*
5947	* The code here concerns itself with getting the next line in an efficient
5948	* manner, very basic classification and trying out corresponding handlers.
5949	* The real work is done in the handlers.
5950	*/
5951	while (offNext < cchContent)
5952	{
5953	size_t offFirstWord;
5954
5955	/*
5956	* Find the end of the next line.
5957	*/
5958	KMK_CC_ASSERT(off == offNext);
5959
5960	/* Simple case: No escaped EOL, nor the end of the input. */
5961	pchTmp = (const char *)memchr(&pszContent[offNext], chFirstEol, cchContent - offNext);
5962	if ( pchTmp
5963	&& ( &pszContent[offNext] == pchTmp
5964	\|\| pchTmp[-1] != '\\') )
5965	{
5966	if ( cchEolSeq == 1
5967	\|\| pchTmp[1] == Compiler.chSecondEol)
5968	{
5969	/* Frequent: Blank line. */
5970	if (&pszContent[offNext] == pchTmp)
5971	{
5972	KMK_CC_EVAL_DPRINTF(("#%03u: <empty>\n", Compiler.iLine));
5973	Compiler.iLine++;
5974	off = offNext += cchEolSeq;
5975	continue;
5976	}
5977	if (pszContent[offNext] == '#')
5978	{
5979	KMK_CC_EVAL_DPRINTF(("#%03u: <comment>\n", Compiler.iLine));
5980	Compiler.iLine++;
5981	offNext = pchTmp - pszContent;
5982	off = offNext += cchEolSeq;
5983	continue;
5984	}
5985
5986	offNext = pchTmp - pszContent;
5987	cchLine = offNext - off;
5988
5989	offFirstWord = off;
5990	while (offFirstWord < offNext && KMK_CC_EVAL_IS_SPACE(pszContent[offFirstWord]))
5991	offFirstWord++;
5992
5993	offNext += cchEolSeq;
5994	Compiler.cEscEols = 0;
5995	Compiler.iEscEol = 0;
5996	}
5997	else
5998	kmk_cc_eval_fatal_eol(&Compiler, pchTmp, Compiler.iLine, off);
5999	}
6000	/* The complicated, less common cases. */
6001	else
6002	{
6003	Compiler.cEscEols = 0;
6004	Compiler.iEscEol = 0;
6005	offFirstWord = offNext;
6006	for (;;)
6007	{
6008	if (offFirstWord == offNext)
6009	{
6010	size_t offEol = off + cchLine;
6011	while (offFirstWord < offEol && KMK_CC_EVAL_IS_SPACE(pszContent[offFirstWord]))
6012	offFirstWord++;
6013	}
6014
6015	if (pchTmp)
6016	{
6017	if ( cchEolSeq == 1
6018	\|\| pchTmp[1] == Compiler.chSecondEol)
6019	{
6020	size_t offEsc;
6021	if (offFirstWord != offNext)
6022	offNext = pchTmp - pszContent;
6023	else
6024	{
6025	offNext = pchTmp - pszContent;
6026	while (offFirstWord < offNext && KMK_CC_EVAL_IS_SPACE(pszContent[offFirstWord]))
6027	offFirstWord++;
6028	}
6029
6030
6031	/* Is it an escape sequence? */
6032	if ( !offNext
6033	\|\| pchTmp[-1] != '\\')
6034	{
6035	cchLine = offNext - off;
6036	offNext += cchEolSeq;
6037	break;
6038	}
6039	if (offNext < 2 \|\| pchTmp[-2] != '\\')
6040	offEsc = offNext - 1;
6041	else
6042	{
6043	/* Count how many backslashes there are. Must be odd number to be an escape
6044	sequence. Normally we keep half of them, except for command lines. */
6045	size_t cSlashes = 2;
6046	while (offNext >= cSlashes && pchTmp[0 - cSlashes] == '\\')
6047	cSlashes--;
6048	if (!(cSlashes & 1))
6049	{
6050	cchLine = offNext - off;
6051	offNext += cchEolSeq;
6052	break;
6053	}
6054	offEsc = offNext - (cSlashes >> 1);
6055	}
6056
6057	/* Record it. */
6058	if (Compiler.cEscEols < Compiler.cEscEolsAllocated) { /* likely */ }
6059	else
6060	{
6061	KMK_CC_ASSERT(Compiler.cEscEols == Compiler.cEscEolsAllocated);
6062	Compiler.cEscEolsAllocated = Compiler.cEscEolsAllocated
6063	? Compiler.cEscEolsAllocated * 2 : 2;
6064	Compiler.paEscEols = (PKMKCCEVALESCEOL)xrealloc(Compiler.paEscEols,
6065	Compiler.cEscEolsAllocated
6066	* sizeof(Compiler.paEscEols[0]));
6067	}
6068	Compiler.paEscEols[Compiler.cEscEols].offEsc = offEsc;
6069	Compiler.paEscEols[Compiler.cEscEols].offEol = offNext;
6070	Compiler.cEscEols++;
6071
6072	/* Advance. */
6073	offNext += cchEolSeq;
6074	if (offFirstWord == offEsc)
6075	{
6076	offFirstWord = offNext;
6077	Compiler.iEscEol++;
6078	}
6079	}
6080	else
6081	kmk_cc_eval_fatal_eol(&Compiler, pchTmp, Compiler.iLine, off);
6082	}
6083	else
6084	{
6085	/* End of input. Happens only once per compilation, nothing to optimize for. */
6086	if (offFirstWord == offNext)
6087	while (offFirstWord < cchContent && KMK_CC_EVAL_IS_SPACE(pszContent[offFirstWord]))
6088	offFirstWord++;
6089	offNext = cchContent;
6090	cchLine = cchContent - off;
6091	break;
6092	}
6093	pchTmp = (const char *)memchr(&pszContent[offNext], chFirstEol, cchContent - offNext);
6094	}
6095	}
6096	KMK_CC_ASSERT(offNext <= cchContent);
6097	KMK_CC_ASSERT(offNext >= off + cchLine);
6098	KMK_CC_ASSERT(off + cchLine <= cchContent && cchLine <= cchContent);
6099	KMK_CC_ASSERT(offFirstWord <= off + cchLine);
6100	KMK_CC_ASSERT(offFirstWord >= off);
6101	KMK_CC_ASSERT(pszContent[offFirstWord] != ' ' && pszContent[offFirstWord] != '\t');
6102
6103	KMK_CC_EVAL_DPRINTF(("#%03u: %.s\n", Compiler.iLine, (int)cchLine, (int)cchLine, &pszContent[off]));
6104
6105	/*
6106	* Skip blank lines.
6107	*/
6108	if (offFirstWord < off + cchLine)
6109	{
6110	/*
6111	* Command? Ignore command prefix if no open recipe (SunOS 4 behavior).
6112	*/
6113	if ( pszContent[off] == Compiler.chCmdPrefix
6114	&& (Compiler.pRecipe \|\| Compiler.fNoTargetRecipe))
6115	{
6116	if (!Compiler.fNoTargetRecipe)
6117	kmk_cc_eval_handle_command(&Compiler, &pszContent[off], cchLine);
6118	}
6119	/*
6120	* Since it's not a command line, we can now skip comment lines
6121	* even with a tab indentation. If it's not a comment line, we
6122	* tentatively strip any trailing comment.
6123	*/
6124	else if (pszContent[offFirstWord] != '#')
6125	{
6126	const char *pchWord = &pszContent[offFirstWord];
6127	size_t cchLeft = off + cchLine - offFirstWord;
6128	char ch;
6129
6130	Compiler.cchLineWithComments = cchLine;
6131	pchTmp = (const char *)memchr(pchWord, '#', cchLeft);
6132	if (pchTmp)
6133	{
6134	cchLeft = pchTmp - pchWord;
6135	cchLine = pchTmp - &pszContent[off];
6136	}
6137	Compiler.cchLine = cchLine;
6138	Compiler.offLine = off;
6139
6140	/*
6141	* If not a directive or variable qualifier, it's either a variable
6142	* assignment or a recipe.
6143	*/
6144	ch = *pchWord;
6145	if ( !KMK_CC_EVAL_IS_1ST_IN_KEYWORD(ch)
6146	\|\| !KMK_CC_EVAL_IS_2ND_IN_KEYWORD(pchWord[1])
6147	\|\| !kmk_cc_eval_try_handle_keyword(&Compiler, ch, pchWord, cchLeft) )
6148	{
6149	pchTmp = (const char *)memchr(pchWord, '=', cchLeft);
6150	if (pchTmp)
6151	kmk_cc_eval_handle_assignment_or_recipe(&Compiler, pchTmp, pchWord, cchLeft, 0);
6152	else
6153	kmk_cc_eval_handle_recipe(&Compiler, pchTmp, pchWord, cchLeft);
6154	}
6155	/* else: handled a keyword expression */
6156	}
6157	}
6158
6159	/*
6160	* Advance to the next line.
6161	*/
6162	off = offNext;
6163	Compiler.iLine += Compiler.cEscEols + 1;
6164	}
6165	}
6166
6167	/*
6168	* Check whether
6169	*/
6170
6171	kmk_cc_eval_delete_compiler(&Compiler);
6172	KMK_CC_EVAL_DPRINTF(("kmk_cc_eval_compile_worker - done (%s/%s)\n\n", pEvalProg->pszFilename, pEvalProg->pszVarName));
6173	return 0;
6174	}
6175
6176
6177
6178	static PKMKCCEVALPROG kmk_cc_eval_compile(const char *pszContent, size_t cchContent,
6179	const char pszFilename, unsigned iLine, const char pszVarName)
6180	{
6181	/*
6182	* Estimate block size, allocate one and initialize it.
6183	*/
6184	PKMKCCEVALPROG pEvalProg;
6185	PKMKCCBLOCK pBlock;
6186	pEvalProg = kmk_cc_block_alloc_first(&pBlock, sizeof(pEvalProg), cchContent / 32); /* @todo adjust */
6187	if (pEvalProg)
6188	{
6189	pEvalProg->pBlockTail = pBlock;
6190	pEvalProg->pFirstInstr = (PKMKCCEVALCORE)kmk_cc_block_get_next_ptr(pBlock);
6191	pEvalProg->pszFilename = pszFilename ? pszFilename : "<unknown>";
6192	pEvalProg->pszVarName = pszVarName;
6193	pEvalProg->cRefs = 1;
6194	#ifdef KMK_CC_STRICT
6195	pEvalProg->uInputHash = kmk_cc_debug_string_hash_n(0, pszContent, cchContent);
6196	#endif
6197
6198	/*
6199	* Do the actual compiling.
6200	*/
6201	#ifdef CONFIG_WITH_EVAL_COMPILER
6202	if (kmk_cc_eval_compile_worker(pEvalProg, pszContent, cchContent, iLine) == 0)
6203	#else
6204	if (0)
6205	#endif
6206	{
6207	#ifdef KMK_CC_WITH_STATS
6208	pBlock = pEvalProg->pBlockTail;
6209	if (!pBlock->pNext)
6210	g_cSingleBlockEvalProgs++;
6211	else if (!pBlock->pNext->pNext)
6212	g_cTwoBlockEvalProgs++;
6213	else
6214	g_cMultiBlockEvalProgs++;
6215	for (; pBlock; pBlock = pBlock->pNext)
6216	{
6217	g_cBlocksAllocatedEvalProgs++;
6218	g_cbAllocatedEvalProgs += pBlock->cbBlock;
6219	g_cbUnusedMemEvalProgs += pBlock->cbBlock - pBlock->offNext;
6220	}
6221	#endif
6222	return pEvalProg;
6223	}
6224	kmk_cc_block_free_list(pEvalProg->pBlockTail);
6225	}
6226	return NULL;
6227	}
6228
6229
6230	/**
6231	* Compiles a variable direct evaluation as is, setting v->evalprog on success.
6232	*
6233	* @returns Pointer to the program on success, NULL if no program was created.
6234	* @param pVar Pointer to the variable.
6235	*/
6236	struct kmk_cc_evalprog kmk_cc_compile_variable_for_eval(struct variable pVar)
6237	{
6238	PKMKCCEVALPROG pEvalProg = pVar->evalprog;
6239	if (!pEvalProg)
6240	{
6241	#ifdef CONFIG_WITH_EVAL_COMPILER
6242	pEvalProg = kmk_cc_eval_compile(pVar->value, pVar->value_length,
6243	pVar->fileinfo.filenm, pVar->fileinfo.lineno, pVar->name);
6244	pVar->evalprog = pEvalProg;
6245	#endif
6246	g_cVarForEvalCompilations++;
6247	}
6248	return pEvalProg;
6249	}
6250
6251
6252	/**
6253	* Compiles a makefile for
6254	*
6255	* @returns Pointer to the program on success, NULL if no program was created.
6256	* @param pVar Pointer to the variable.
6257	*/
6258	struct kmk_cc_evalprog kmk_cc_compile_file_for_eval(FILE pFile, const char *pszFilename)
6259	{
6260	PKMKCCEVALPROG pEvalProg;
6261
6262	/*
6263	* Read the entire file into a zero terminate memory buffer.
6264	*/
6265	size_t cchContent = 0;
6266	char *pszContent = NULL;
6267	struct stat st;
6268	if (!fstat(fileno(pFile), &st))
6269	{
6270	if ( st.st_size > (off_t)1610241024
6271	&& st.st_size < 0)
6272	fatal(NULL, _("Makefile too large to compile: %ld bytes (%#lx) - max 16MB"), (long)st.st_size, (long)st.st_size);
6273	cchContent = (size_t)st.st_size;
6274	pszContent = (char *)xmalloc(cchContent + 1);
6275
6276	cchContent = fread(pszContent, 1, cchContent, pFile);
6277	if (ferror(pFile))
6278	fatal(NULL, _("Read error: %s"), strerror(errno));
6279	}
6280	else
6281	{
6282	size_t cbAllocated = 2048;
6283	do
6284	{
6285	cbAllocated *= 2;
6286	if (cbAllocated > 1610241024)
6287	fatal(NULL, _("Makefile too large to compile: max 16MB"));
6288	pszContent = (char *)xrealloc(pszContent, cbAllocated);
6289	cchContent += fread(&pszContent[cchContent], 1, cbAllocated - 1 - cchContent, pFile);
6290	if (ferror(pFile))
6291	fatal(NULL, _("Read error: %s"), strerror(errno));
6292	} while (!feof(pFile));
6293	}
6294	pszContent[cchContent] = '\0';
6295
6296	/*
6297	* Call common function to do the compilation.
6298	*/
6299	pEvalProg = kmk_cc_eval_compile(pszContent, cchContent, pszFilename, 1, NULL /pszVarName/);
6300	g_cFileForEvalCompilations++;
6301
6302	free(pszContent);
6303	if (!pEvalProg)
6304	fseek(pFile, 0, SEEK_SET);
6305	return pEvalProg;
6306	}
6307
6308
6309	/**
6310	* Equivalent of eval_buffer, only it's using the evalprog of the variable.
6311	*
6312	* @param pVar Pointer to the variable. Must have a program.
6313	*/
6314	void kmk_exec_eval_variable(struct variable *pVar)
6315	{
6316	KMK_CC_ASSERT(pVar->evalprog);
6317	assert(0);
6318	}
6319
6320
6321	/**
6322	* Worker for eval_makefile.
6323	*
6324	* @param pEvalProg The program pointer.
6325	*/
6326	void kmk_exec_eval_file(struct kmk_cc_evalprog *pEvalProg)
6327	{
6328	KMK_CC_ASSERT(pEvalProg);
6329	assert(0);
6330	}
6331
6332
6333
6334	/*
6335	*
6336	* Program destruction hooks.
6337	* Program destruction hooks.
6338	* Program destruction hooks.
6339	*
6340	*/
6341
6342
6343	/**
6344	* Called when a variable with expandprog or/and evalprog changes.
6345	*
6346	* @param pVar Pointer to the variable.
6347	*/
6348	void kmk_cc_variable_changed(struct variable *pVar)
6349	{
6350	PKMKCCEXPPROG pProg = pVar->expandprog;
6351
6352	KMK_CC_ASSERT(pVar->evalprog \|\| pProg);
6353
6354	if (pVar->evalprog)
6355	{
6356	kmk_cc_block_free_list(pVar->evalprog->pBlockTail);
6357	pVar->evalprog = NULL;
6358	}
6359
6360	if (pProg)
6361	{
6362	if (pProg->cRefs == 1)
6363	kmk_cc_block_free_list(pProg->pBlockTail);
6364	else
6365	fatal(NULL, _("Modifying a variable (%s) while its expansion program is running is not supported"), pVar->name);
6366	pVar->expandprog = NULL;
6367	}
6368	}
6369
6370
6371	/**
6372	* Called when a variable with expandprog or/and evalprog is deleted.
6373	*
6374	* @param pVar Pointer to the variable.
6375	*/
6376	void kmk_cc_variable_deleted(struct variable *pVar)
6377	{
6378	PKMKCCEXPPROG pProg = pVar->expandprog;
6379
6380	KMK_CC_ASSERT(pVar->evalprog \|\| pProg);
6381
6382	if (pVar->evalprog)
6383	{
6384	kmk_cc_block_free_list(pVar->evalprog->pBlockTail);
6385	pVar->evalprog = NULL;
6386	}
6387
6388	if (pProg)
6389	{
6390	if (pProg->cRefs == 1)
6391	kmk_cc_block_free_list(pProg->pBlockTail);
6392	else
6393	fatal(NULL, _("Deleting a variable (%s) while its expansion program is running is not supported"), pVar->name);
6394	pVar->expandprog = NULL;
6395	}
6396	}
6397
6398
6399
6400
6401
6402
6403
6404	#endif /* CONFIG_WITH_COMPILER */
6405

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source: kBuild/trunk/src/kmk/kmk_cc_exec.c@ 2801

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