[77232] | 1 | /* $Id: VDScript.cpp 103522 2024-02-22 11:15:20Z vboxsync $ */
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[44811] | 2 | /** @file
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| 3 | * VBox HDD container test utility - scripting engine.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2013-2023 Oracle and/or its affiliates.
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[44811] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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[44811] | 26 | */
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| 27 |
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| 28 | /** @page pg_vd_script VDScript - Simple scripting language for VD I/O testing.
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| 29 | *
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| 30 | * This component implements a very simple scripting language to make testing the VD
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| 31 | * library more flexible and testcases faster to implement without the need to recompile
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| 32 | * everything after it changed.
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| 33 | * The language is a small subset of the C language. It doesn't support unions, structs,
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| 34 | * global variables, typedefed types or pointers (yet). It also adds a boolean and a string type.
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| 35 | * Strings are immutable and only to print messages from the script.
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| 36 | * There are also not the default types like int or unsigned because theire ranges are architecture
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| 37 | * dependent. Instead VDScript uses uint8_t, int8_t, ... as primitive types.
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| 38 | *
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| 39 | * Why inventing a completely new language?
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| 40 | *
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| 41 | * Well it is not a completely new language to start with, it is a subset of C and the
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| 42 | * language can be extended later on to reach the full C language later on.
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| 43 | * Second, there is no static typed scripting language I like which could be implemented
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| 44 | * and finally because I can ;)
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| 45 | * The code implementing the scripting engine is designed to be easily incorporated into other
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| 46 | * code. Could be used as a scripting language for the VBox debugger for example or in the scm
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| 47 | * tool to automatically rewrite C code using the AST VDSCript generates...
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[44840] | 48 | *
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| 49 | * The syntax of VDSCript is derived from the C syntax. The syntax of C in BNF was taken
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| 50 | * from: http://www.csci.csusb.edu/dick/samples/c.syntax.html
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| 51 | * and: http://slps.github.com/zoo/c/iso-9899-tc3.html
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| 52 | * and: http://www.open-std.org/jtc1/sc22/WG14/www/docs/n1256.pdf
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[44811] | 53 | */
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[57415] | 54 |
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[44811] | 55 | #define LOGGROUP LOGGROUP_DEFAULT
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[76346] | 56 | #include <iprt/ctype.h>
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[76474] | 57 | #include <iprt/errcore.h>
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[44811] | 58 | #include <iprt/list.h>
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| 59 | #include <iprt/mem.h>
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[44840] | 60 | #include <iprt/stream.h>
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[76346] | 61 | #include <iprt/string.h>
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[44811] | 62 |
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| 63 | #include <VBox/log.h>
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| 64 |
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| 65 | #include "VDScriptAst.h"
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[44842] | 66 | #include "VDScriptInternal.h"
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[44811] | 67 |
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| 68 | /**
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| 69 | * VD script token class.
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| 70 | */
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| 71 | typedef enum VDTOKENCLASS
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| 72 | {
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| 73 | /** Invalid. */
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| 74 | VDTOKENCLASS_INVALID = 0,
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| 75 | /** Identifier class. */
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| 76 | VDTOKENCLASS_IDENTIFIER,
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| 77 | /** Numerical constant. */
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| 78 | VDTOKENCLASS_NUMCONST,
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| 79 | /** String constant. */
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| 80 | VDTOKENCLASS_STRINGCONST,
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| 81 | /** Operators */
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| 82 | VDTOKENCLASS_OPERATORS,
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| 83 | /** Reserved keyword */
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| 84 | VDTOKENCLASS_KEYWORD,
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| 85 | /** Punctuator */
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| 86 | VDTOKENCLASS_PUNCTUATOR,
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| 87 | /** End of stream */
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| 88 | VDTOKENCLASS_EOS,
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| 89 | /** 32bit hack. */
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| 90 | VDTOKENCLASS_32BIT_HACK = 0x7fffffff
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| 91 | } VDTOKENCLASS;
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| 92 | /** Pointer to a token class. */
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| 93 | typedef VDTOKENCLASS *PVDTOKENCLASS;
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| 94 |
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| 95 | /**
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| 96 | * Keyword types.
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| 97 | */
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| 98 | typedef enum VDSCRIPTTOKENKEYWORD
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| 99 | {
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| 100 | VDSCRIPTTOKENKEYWORD_INVALID = 0,
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| 101 | VDSCRIPTTOKENKEYWORD_CONTINUE,
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[52371] | 102 | VDSCRIPTTOKENKEYWORD_REGISTER,
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| 103 | VDSCRIPTTOKENKEYWORD_RESTRICT,
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| 104 | VDSCRIPTTOKENKEYWORD_VOLATILE,
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| 105 | VDSCRIPTTOKENKEYWORD_TYPEDEF,
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[44811] | 106 | VDSCRIPTTOKENKEYWORD_DEFAULT,
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[52371] | 107 | VDSCRIPTTOKENKEYWORD_EXTERN,
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| 108 | VDSCRIPTTOKENKEYWORD_STATIC,
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[44811] | 109 | VDSCRIPTTOKENKEYWORD_RETURN,
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| 110 | VDSCRIPTTOKENKEYWORD_SWITCH,
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[52371] | 111 | VDSCRIPTTOKENKEYWORD_STRUCT,
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[44811] | 112 | VDSCRIPTTOKENKEYWORD_WHILE,
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| 113 | VDSCRIPTTOKENKEYWORD_BREAK,
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[52371] | 114 | VDSCRIPTTOKENKEYWORD_CONST,
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[44840] | 115 | VDSCRIPTTOKENKEYWORD_FALSE,
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| 116 | VDSCRIPTTOKENKEYWORD_TRUE,
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[44811] | 117 | VDSCRIPTTOKENKEYWORD_ELSE,
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| 118 | VDSCRIPTTOKENKEYWORD_CASE,
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[52371] | 119 | VDSCRIPTTOKENKEYWORD_AUTO,
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[44811] | 120 | VDSCRIPTTOKENKEYWORD_FOR,
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| 121 | VDSCRIPTTOKENKEYWORD_IF,
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| 122 | VDSCRIPTTOKENKEYWORD_DO,
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| 123 | VDSCRIPTTOKENKEYWORD_32BIT_HACK = 0x7fffffff
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| 124 | } VDSCRIPTTOKENKEYWORD;
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| 125 | /** Pointer to a keyword type. */
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| 126 | typedef VDSCRIPTTOKENKEYWORD *PVDSCRIPTTOKENKEYWORD;
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| 127 |
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| 128 | /**
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| 129 | * VD script token.
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| 130 | */
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| 131 | typedef struct VDSCRIPTTOKEN
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| 132 | {
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| 133 | /** Token class. */
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| 134 | VDTOKENCLASS enmClass;
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| 135 | /** Token position in the source buffer. */
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| 136 | VDSRCPOS Pos;
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| 137 | /** Data based on the token class. */
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| 138 | union
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| 139 | {
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| 140 | /** Identifier. */
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| 141 | struct
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| 142 | {
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| 143 | /** Pointer to the start of the identifier. */
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| 144 | const char *pszIde;
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| 145 | /** Number of characters for the identifier excluding the null terminator. */
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| 146 | size_t cchIde;
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| 147 | } Ide;
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| 148 | /** Numerical constant. */
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| 149 | struct
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| 150 | {
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[44840] | 151 | uint64_t u64;
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[44811] | 152 | } NumConst;
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| 153 | /** String constant */
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| 154 | struct
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| 155 | {
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| 156 | /** Pointer to the start of the string constant. */
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| 157 | const char *pszString;
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| 158 | /** Number of characters of the string, including the null terminator. */
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| 159 | size_t cchString;
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| 160 | } StringConst;
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| 161 | /** Operator */
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| 162 | struct
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| 163 | {
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| 164 | /** The operator string. */
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| 165 | char aszOp[4]; /** Maximum of 3 for >>= + null terminator. */
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| 166 | } Operator;
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| 167 | /** Keyword. */
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| 168 | struct
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| 169 | {
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| 170 | /** The keyword type. */
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| 171 | VDSCRIPTTOKENKEYWORD enmKeyword;
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| 172 | } Keyword;
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| 173 | /** Punctuator. */
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| 174 | struct
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| 175 | {
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| 176 | /** The punctuator in question. */
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| 177 | char chPunctuator;
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| 178 | } Punctuator;
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| 179 | } Class;
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| 180 | } VDSCRIPTTOKEN;
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| 181 | /** Pointer to a script token. */
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| 182 | typedef VDSCRIPTTOKEN *PVDSCRIPTTOKEN;
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| 183 | /** Pointer to a const script token. */
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| 184 | typedef const VDSCRIPTTOKEN *PCVDSCRIPTTOKEN;
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| 185 |
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| 186 | /**
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| 187 | * Tokenizer state.
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| 188 | */
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| 189 | typedef struct VDTOKENIZER
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| 190 | {
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| 191 | /** Char buffer to read from. */
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| 192 | const char *pszInput;
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| 193 | /** Current position ininput buffer. */
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| 194 | VDSRCPOS Pos;
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| 195 | /** Token 1. */
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| 196 | VDSCRIPTTOKEN Token1;
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| 197 | /** Token 2. */
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| 198 | VDSCRIPTTOKEN Token2;
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| 199 | /** Pointer to the current active token. */
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| 200 | PVDSCRIPTTOKEN pTokenCurr;
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| 201 | /** The next token in the input stream (used for peeking). */
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| 202 | PVDSCRIPTTOKEN pTokenNext;
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| 203 | } VDTOKENIZER;
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| 204 |
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| 205 | /**
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| 206 | * Operators entry.
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| 207 | */
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| 208 | typedef struct VDSCRIPTOP
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| 209 | {
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| 210 | /** Operator string. */
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| 211 | const char *pszOp;
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| 212 | /** Size of the operator in characters without zero terminator. */
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| 213 | size_t cchOp;
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| 214 | } VDSCRIPTOP;
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| 215 | /** Pointer to a script operator. */
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| 216 | typedef VDSCRIPTOP *PVDSCRIPTOP;
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| 217 |
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| 218 | /**
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| 219 | * Known operators array, sort from higest character count to lowest.
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| 220 | */
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| 221 | static VDSCRIPTOP g_aScriptOps[] =
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| 222 | {
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| 223 | {">>=", 3},
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| 224 | {"<<=", 3},
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| 225 | {"+=", 2},
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| 226 | {"-=", 2},
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| 227 | {"/=", 2},
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| 228 | {"%=", 2},
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| 229 | {"&=", 2},
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| 230 | {"|=", 2},
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| 231 | {"^=", 2},
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| 232 | {"&&", 2},
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| 233 | {"||", 2},
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| 234 | {"<<", 2},
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| 235 | {">>", 2},
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| 236 | {"++", 2},
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| 237 | {"--", 2},
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| 238 | {"==", 2},
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| 239 | {"!=", 2},
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| 240 | {">=", 2},
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| 241 | {"<=", 2},
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[52371] | 242 | {"->", 2},
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[44811] | 243 | {"=", 1},
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| 244 | {"+", 1},
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| 245 | {"-", 1},
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| 246 | {"*", 1},
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| 247 | {"/", 1},
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| 248 | {"%", 1},
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| 249 | {"|", 1},
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| 250 | {"&", 1},
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| 251 | {"^", 1},
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| 252 | {"<", 1},
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| 253 | {">", 1},
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[44840] | 254 | {"!", 1},
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[52371] | 255 | {"~", 1},
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| 256 | {".", 1}
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[44811] | 257 | };
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| 258 |
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| 259 | /**
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| 260 | * Known punctuators.
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| 261 | */
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| 262 | static VDSCRIPTOP g_aScriptPunctuators[] =
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| 263 | {
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| 264 | {"(", 1},
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| 265 | {")", 1},
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| 266 | {"{", 1},
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| 267 | {"}", 1},
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| 268 | {",", 1},
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| 269 | {";", 1},
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| 270 | };
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| 271 |
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| 272 | /**
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| 273 | * Keyword entry.
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| 274 | */
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| 275 | typedef struct VDSCRIPTKEYWORD
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| 276 | {
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| 277 | /** Keyword string. */
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| 278 | const char *pszKeyword;
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| 279 | /** Size of the string in characters without zero terminator. */
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| 280 | size_t cchKeyword;
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| 281 | /** Keyword type. */
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| 282 | VDSCRIPTTOKENKEYWORD enmKeyword;
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| 283 | } VDSCRIPTKEYWORD;
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| 284 | /** */
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| 285 | typedef VDSCRIPTKEYWORD *PVDSCRIPTKEYWORD;
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| 286 |
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| 287 | /**
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| 288 | * Known keywords.
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| 289 | */
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| 290 | static VDSCRIPTKEYWORD g_aKeywords[] =
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| 291 | {
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[52415] | 292 | {RT_STR_TUPLE("continue"), VDSCRIPTTOKENKEYWORD_CONTINUE},
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| 293 | {RT_STR_TUPLE("register"), VDSCRIPTTOKENKEYWORD_REGISTER},
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| 294 | {RT_STR_TUPLE("restrict"), VDSCRIPTTOKENKEYWORD_RESTRICT},
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| 295 | {RT_STR_TUPLE("volatile"), VDSCRIPTTOKENKEYWORD_VOLATILE},
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| 296 | {RT_STR_TUPLE("typedef"), VDSCRIPTTOKENKEYWORD_TYPEDEF},
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| 297 | {RT_STR_TUPLE("default"), VDSCRIPTTOKENKEYWORD_DEFAULT},
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| 298 | {RT_STR_TUPLE("extern"), VDSCRIPTTOKENKEYWORD_EXTERN},
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| 299 | {RT_STR_TUPLE("static"), VDSCRIPTTOKENKEYWORD_STATIC},
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| 300 | {RT_STR_TUPLE("return"), VDSCRIPTTOKENKEYWORD_RETURN},
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| 301 | {RT_STR_TUPLE("switch"), VDSCRIPTTOKENKEYWORD_SWITCH},
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| 302 | {RT_STR_TUPLE("struct"), VDSCRIPTTOKENKEYWORD_STRUCT},
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| 303 | {RT_STR_TUPLE("while"), VDSCRIPTTOKENKEYWORD_WHILE},
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| 304 | {RT_STR_TUPLE("break"), VDSCRIPTTOKENKEYWORD_BREAK},
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| 305 | {RT_STR_TUPLE("const"), VDSCRIPTTOKENKEYWORD_CONST},
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| 306 | {RT_STR_TUPLE("false"), VDSCRIPTTOKENKEYWORD_FALSE},
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| 307 | {RT_STR_TUPLE("true"), VDSCRIPTTOKENKEYWORD_TRUE},
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| 308 | {RT_STR_TUPLE("else"), VDSCRIPTTOKENKEYWORD_ELSE},
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| 309 | {RT_STR_TUPLE("case"), VDSCRIPTTOKENKEYWORD_CASE},
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| 310 | {RT_STR_TUPLE("auto"), VDSCRIPTTOKENKEYWORD_AUTO},
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| 311 | {RT_STR_TUPLE("for"), VDSCRIPTTOKENKEYWORD_FOR},
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| 312 | {RT_STR_TUPLE("if"), VDSCRIPTTOKENKEYWORD_IF},
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| 313 | {RT_STR_TUPLE("do"), VDSCRIPTTOKENKEYWORD_DO}
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[44811] | 314 | };
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| 315 |
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| 316 | static int vdScriptParseCompoundStatement(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTSTMT *ppAstNodeCompound);
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| 317 | static int vdScriptParseStatement(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTSTMT *ppAstNodeStmt);
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[44840] | 318 | static int vdScriptParseExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr);
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| 319 | static int vdScriptParseAssignmentExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr);
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[52371] | 320 | static int vdScriptParseCastExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr);
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[62873] | 321 | #if 0 /* unused */
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[52371] | 322 | static int vdScriptParseConstExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr);
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[62873] | 323 | #endif
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[44811] | 324 |
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| 325 | /**
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| 326 | * Returns whether the tokenizer reached the end of the stream.
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| 327 | *
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| 328 | * @returns true if the tokenizer reached the end of stream marker
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| 329 | * false otherwise.
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| 330 | * @param pTokenizer The tokenizer state.
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| 331 | */
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| 332 | DECLINLINE(bool) vdScriptTokenizerIsEos(PVDTOKENIZER pTokenizer)
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| 333 | {
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| 334 | return *pTokenizer->pszInput == '\0';
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| 335 | }
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| 336 |
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| 337 | /**
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| 338 | * Skip one character in the input stream.
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| 339 | *
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| 340 | * @param pTokenizer The tokenizer state.
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| 341 | */
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| 342 | DECLINLINE(void) vdScriptTokenizerSkipCh(PVDTOKENIZER pTokenizer)
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| 343 | {
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| 344 | pTokenizer->pszInput++;
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| 345 | pTokenizer->Pos.iChStart++;
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| 346 | pTokenizer->Pos.iChEnd++;
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| 347 | }
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| 348 |
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| 349 | /**
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| 350 | * Returns the next char in the input buffer without advancing it.
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| 351 | *
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| 352 | * @returns Next character in the input buffer.
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| 353 | * @param pTokenizer The tokenizer state.
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| 354 | */
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| 355 | DECLINLINE(char) vdScriptTokenizerPeekCh(PVDTOKENIZER pTokenizer)
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| 356 | {
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| 357 | return vdScriptTokenizerIsEos(pTokenizer)
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| 358 | ? '\0'
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| 359 | : *(pTokenizer->pszInput + 1);
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| 360 | }
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| 361 |
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| 362 | /**
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| 363 | * Returns the next character in the input buffer advancing the internal
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| 364 | * position.
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| 365 | *
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| 366 | * @returns Next character in the stream.
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| 367 | * @param pTokenizer The tokenizer state.
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| 368 | */
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| 369 | DECLINLINE(char) vdScriptTokenizerGetCh(PVDTOKENIZER pTokenizer)
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| 370 | {
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| 371 | char ch;
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| 372 |
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| 373 | if (vdScriptTokenizerIsEos(pTokenizer))
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| 374 | ch = '\0';
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| 375 | else
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| 376 | ch = *pTokenizer->pszInput;
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| 377 |
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| 378 | return ch;
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| 379 | }
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| 380 |
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| 381 | /**
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| 382 | * Sets a new line for the tokenizer.
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| 383 | *
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| 384 | * @param pTokenizer The tokenizer state.
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| 385 | */
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| 386 | DECLINLINE(void) vdScriptTokenizerNewLine(PVDTOKENIZER pTokenizer, unsigned cSkip)
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| 387 | {
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| 388 | pTokenizer->pszInput += cSkip;
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| 389 | pTokenizer->Pos.iLine++;
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| 390 | pTokenizer->Pos.iChStart = 1;
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| 391 | pTokenizer->Pos.iChEnd = 1;
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| 392 | }
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| 393 |
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| 394 | /**
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| 395 | * Checks whether the current position in the input stream is a new line
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| 396 | * and skips it.
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| 397 | *
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| 398 | * @returns Flag whether there was a new line at the current position
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| 399 | * in the input buffer.
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| 400 | * @param pTokenizer The tokenizer state.
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| 401 | */
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| 402 | DECLINLINE(bool) vdScriptTokenizerIsSkipNewLine(PVDTOKENIZER pTokenizer)
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| 403 | {
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| 404 | bool fNewline = true;
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| 405 |
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[44941] | 406 | if ( vdScriptTokenizerGetCh(pTokenizer) == '\r'
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[44811] | 407 | && vdScriptTokenizerPeekCh(pTokenizer) == '\n')
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| 408 | vdScriptTokenizerNewLine(pTokenizer, 2);
|
---|
[44941] | 409 | else if (vdScriptTokenizerGetCh(pTokenizer) == '\n')
|
---|
[44811] | 410 | vdScriptTokenizerNewLine(pTokenizer, 1);
|
---|
| 411 | else
|
---|
| 412 | fNewline = false;
|
---|
| 413 |
|
---|
| 414 | return fNewline;
|
---|
| 415 | }
|
---|
| 416 |
|
---|
| 417 | /**
|
---|
| 418 | * Skips a multi line comment.
|
---|
| 419 | *
|
---|
| 420 | * @param pTokenizer The tokenizer state.
|
---|
| 421 | */
|
---|
| 422 | DECLINLINE(void) vdScriptTokenizerSkipComment(PVDTOKENIZER pTokenizer)
|
---|
| 423 | {
|
---|
| 424 | while ( !vdScriptTokenizerIsEos(pTokenizer)
|
---|
[44941] | 425 | && ( vdScriptTokenizerGetCh(pTokenizer) != '*'
|
---|
| 426 | || vdScriptTokenizerPeekCh(pTokenizer) != '/'))
|
---|
[44811] | 427 | {
|
---|
| 428 | if (!vdScriptTokenizerIsSkipNewLine(pTokenizer))
|
---|
| 429 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 430 | }
|
---|
[44840] | 431 |
|
---|
| 432 | if (!vdScriptTokenizerIsEos(pTokenizer))
|
---|
| 433 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 434 | if (!vdScriptTokenizerIsEos(pTokenizer))
|
---|
| 435 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
[44811] | 436 | }
|
---|
| 437 |
|
---|
| 438 | /**
|
---|
| 439 | * Skip all whitespace starting from the current input buffer position.
|
---|
| 440 | * Skips all present comments too.
|
---|
| 441 | *
|
---|
| 442 | * @param pTokenizer The tokenizer state.
|
---|
| 443 | */
|
---|
| 444 | DECLINLINE(void) vdScriptTokenizerSkipWhitespace(PVDTOKENIZER pTokenizer)
|
---|
| 445 | {
|
---|
[44840] | 446 | while (!vdScriptTokenizerIsEos(pTokenizer))
|
---|
[44811] | 447 | {
|
---|
[44840] | 448 | while ( vdScriptTokenizerGetCh(pTokenizer) == ' '
|
---|
| 449 | || vdScriptTokenizerGetCh(pTokenizer) == '\t')
|
---|
[44811] | 450 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 451 |
|
---|
| 452 | if ( !vdScriptTokenizerIsEos(pTokenizer)
|
---|
| 453 | && !vdScriptTokenizerIsSkipNewLine(pTokenizer))
|
---|
| 454 | {
|
---|
| 455 | if ( vdScriptTokenizerGetCh(pTokenizer) == '/'
|
---|
| 456 | && vdScriptTokenizerPeekCh(pTokenizer) == '*')
|
---|
[44840] | 457 | {
|
---|
| 458 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 459 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
[44811] | 460 | vdScriptTokenizerSkipComment(pTokenizer);
|
---|
[44840] | 461 | }
|
---|
[44811] | 462 | else
|
---|
| 463 | break; /* Skipped everything, next is some real content. */
|
---|
| 464 | }
|
---|
| 465 | }
|
---|
| 466 | }
|
---|
| 467 |
|
---|
| 468 | /**
|
---|
| 469 | * Get an identifier token from the tokenizer.
|
---|
| 470 | *
|
---|
| 471 | * @param pTokenizer The tokenizer state.
|
---|
| 472 | * @param pToken The uninitialized token.
|
---|
| 473 | */
|
---|
| 474 | static void vdScriptTokenizerGetIdeOrKeyword(PVDTOKENIZER pTokenizer, PVDSCRIPTTOKEN pToken)
|
---|
| 475 | {
|
---|
| 476 | char ch;
|
---|
[62732] | 477 | unsigned cchIde = 0;
|
---|
[44811] | 478 | bool fIsKeyword = false;
|
---|
| 479 | const char *pszIde = pTokenizer->pszInput;
|
---|
| 480 |
|
---|
| 481 | pToken->Pos = pTokenizer->Pos;
|
---|
| 482 |
|
---|
| 483 | Assert(RT_C_IS_ALPHA(*pszIde) || *pszIde == '_' );
|
---|
| 484 |
|
---|
| 485 | do
|
---|
| 486 | {
|
---|
| 487 | cchIde++;
|
---|
| 488 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 489 | ch = vdScriptTokenizerGetCh(pTokenizer);
|
---|
| 490 | }
|
---|
[44842] | 491 | while (RT_C_IS_ALNUM(ch) || ch == '_');
|
---|
[44811] | 492 |
|
---|
| 493 | /* Check whether we got an identifier or an reserved keyword. */
|
---|
| 494 | for (unsigned i = 0; i < RT_ELEMENTS(g_aKeywords); i++)
|
---|
| 495 | {
|
---|
| 496 | if (!RTStrNCmp(g_aKeywords[i].pszKeyword, pszIde, g_aKeywords[i].cchKeyword))
|
---|
| 497 | {
|
---|
| 498 | fIsKeyword = true;
|
---|
| 499 | pToken->enmClass = VDTOKENCLASS_KEYWORD;
|
---|
| 500 | pToken->Class.Keyword.enmKeyword = g_aKeywords[i].enmKeyword;
|
---|
| 501 | break;
|
---|
| 502 | }
|
---|
| 503 | }
|
---|
| 504 |
|
---|
| 505 | if (!fIsKeyword)
|
---|
| 506 | {
|
---|
| 507 | pToken->enmClass = VDTOKENCLASS_IDENTIFIER;
|
---|
| 508 | pToken->Class.Ide.pszIde = pszIde;
|
---|
| 509 | pToken->Class.Ide.cchIde = cchIde;
|
---|
| 510 | }
|
---|
| 511 | pToken->Pos.iChEnd += cchIde;
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | /**
|
---|
| 515 | * Get a numerical constant from the tokenizer.
|
---|
| 516 | *
|
---|
| 517 | * @param pTokenizer The tokenizer state.
|
---|
| 518 | * @param pToken The uninitialized token.
|
---|
| 519 | */
|
---|
| 520 | static void vdScriptTokenizerGetNumberConst(PVDTOKENIZER pTokenizer, PVDSCRIPTTOKEN pToken)
|
---|
| 521 | {
|
---|
[44840] | 522 | char *pszNext = NULL;
|
---|
[44811] | 523 |
|
---|
| 524 | Assert(RT_C_IS_DIGIT(vdScriptTokenizerGetCh(pTokenizer)));
|
---|
| 525 |
|
---|
[44840] | 526 | /* Let RTStrToUInt64Ex() do all the work, looks C compliant :). */
|
---|
| 527 | pToken->enmClass = VDTOKENCLASS_NUMCONST;
|
---|
| 528 | int rc = RTStrToUInt64Ex(pTokenizer->pszInput, &pszNext, 0, &pToken->Class.NumConst.u64);
|
---|
[62732] | 529 | Assert(RT_SUCCESS(rc) || rc == VWRN_TRAILING_CHARS || rc == VWRN_TRAILING_SPACES); NOREF(rc);
|
---|
[63567] | 530 | /** @todo Handle number to big, throw a warning */
|
---|
[44840] | 531 |
|
---|
| 532 | unsigned cchNumber = pszNext - pTokenizer->pszInput;
|
---|
| 533 | for (unsigned i = 0; i < cchNumber; i++)
|
---|
| 534 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
[44941] | 535 |
|
---|
| 536 | /* Check for a supported suffix, supported are K|M|G. */
|
---|
| 537 | if (vdScriptTokenizerGetCh(pTokenizer) == 'K')
|
---|
| 538 | {
|
---|
| 539 | pToken->Class.NumConst.u64 *= _1K;
|
---|
| 540 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 541 | }
|
---|
| 542 | else if (vdScriptTokenizerGetCh(pTokenizer) == 'M')
|
---|
| 543 | {
|
---|
| 544 | pToken->Class.NumConst.u64 *= _1M;
|
---|
| 545 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 546 | }
|
---|
| 547 | else if (vdScriptTokenizerGetCh(pTokenizer) == 'G')
|
---|
| 548 | {
|
---|
| 549 | pToken->Class.NumConst.u64 *= _1G;
|
---|
| 550 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 551 | }
|
---|
[52371] | 552 | else if (vdScriptTokenizerGetCh(pTokenizer) == 'T')
|
---|
| 553 | {
|
---|
| 554 | pToken->Class.NumConst.u64 *= _1T;
|
---|
| 555 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 556 | }
|
---|
[44811] | 557 | }
|
---|
| 558 |
|
---|
| 559 | /**
|
---|
| 560 | * Parses a string constant.
|
---|
| 561 | *
|
---|
| 562 | * @param pTokenizer The tokenizer state.
|
---|
| 563 | * @param pToken The uninitialized token.
|
---|
| 564 | *
|
---|
[99739] | 565 | * @remarks No escape sequences allowed at this time.
|
---|
[44811] | 566 | */
|
---|
| 567 | static void vdScriptTokenizerGetStringConst(PVDTOKENIZER pTokenizer, PVDSCRIPTTOKEN pToken)
|
---|
| 568 | {
|
---|
[62732] | 569 | unsigned cchStr = 0;
|
---|
[44811] | 570 |
|
---|
| 571 | Assert(vdScriptTokenizerGetCh(pTokenizer) == '\"');
|
---|
| 572 | vdScriptTokenizerSkipCh(pTokenizer); /* Skip " */
|
---|
| 573 |
|
---|
| 574 | pToken->enmClass = VDTOKENCLASS_STRINGCONST;
|
---|
| 575 | pToken->Pos = pTokenizer->Pos;
|
---|
| 576 | pToken->Class.StringConst.pszString = pTokenizer->pszInput;
|
---|
| 577 |
|
---|
| 578 | while (vdScriptTokenizerGetCh(pTokenizer) != '\"')
|
---|
| 579 | {
|
---|
| 580 | cchStr++;
|
---|
| 581 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 582 | }
|
---|
| 583 |
|
---|
| 584 | vdScriptTokenizerSkipCh(pTokenizer); /* Skip closing " */
|
---|
| 585 |
|
---|
| 586 | pToken->Class.StringConst.cchString = cchStr;
|
---|
| 587 | pToken->Pos.iChEnd += cchStr;
|
---|
| 588 | }
|
---|
| 589 |
|
---|
| 590 | /**
|
---|
| 591 | * Get the end of stream token.
|
---|
| 592 | *
|
---|
| 593 | * @param pTokenizer The tokenizer state.
|
---|
| 594 | * @param pToken The uninitialized token.
|
---|
| 595 | */
|
---|
| 596 | static void vdScriptTokenizerGetEos(PVDTOKENIZER pTokenizer, PVDSCRIPTTOKEN pToken)
|
---|
| 597 | {
|
---|
| 598 | Assert(vdScriptTokenizerGetCh(pTokenizer) == '\0');
|
---|
| 599 |
|
---|
| 600 | pToken->enmClass = VDTOKENCLASS_EOS;
|
---|
| 601 | pToken->Pos = pTokenizer->Pos;
|
---|
| 602 | }
|
---|
| 603 |
|
---|
| 604 | /**
|
---|
| 605 | * Get operator or punctuator token.
|
---|
| 606 | *
|
---|
| 607 | * @param pTokenizer The tokenizer state.
|
---|
| 608 | * @param pToken The uninitialized token.
|
---|
| 609 | */
|
---|
| 610 | static void vdScriptTokenizerGetOperatorOrPunctuator(PVDTOKENIZER pTokenizer, PVDSCRIPTTOKEN pToken)
|
---|
| 611 | {
|
---|
| 612 | bool fOpFound = false;
|
---|
| 613 |
|
---|
| 614 | pToken->enmClass = VDTOKENCLASS_INVALID;
|
---|
| 615 | pToken->Pos = pTokenizer->Pos;
|
---|
| 616 |
|
---|
| 617 | /*
|
---|
| 618 | * Use table based approach here, not the fastest solution but enough for our purpose
|
---|
| 619 | * for now.
|
---|
| 620 | */
|
---|
| 621 | for (unsigned i = 0; i < RT_ELEMENTS(g_aScriptOps); i++)
|
---|
| 622 | {
|
---|
| 623 | if (!RTStrNCmp(g_aScriptOps[i].pszOp, pTokenizer->pszInput, g_aScriptOps[i].cchOp))
|
---|
| 624 | {
|
---|
| 625 | memset(pToken->Class.Operator.aszOp, 0, sizeof(pToken->Class.Operator.aszOp));
|
---|
| 626 |
|
---|
| 627 | int rc = RTStrCopy(pToken->Class.Operator.aszOp, sizeof(pToken->Class.Operator.aszOp), g_aScriptOps[i].pszOp);
|
---|
| 628 | AssertRC(rc);
|
---|
| 629 |
|
---|
| 630 | pToken->enmClass = VDTOKENCLASS_OPERATORS;
|
---|
[62732] | 631 | pToken->Pos.iChEnd += (unsigned)g_aScriptOps[i].cchOp;
|
---|
[44811] | 632 |
|
---|
[63567] | 633 | /** @todo Make this prettier. */
|
---|
[44811] | 634 | for (unsigned j = 0; j < g_aScriptOps[i].cchOp; j++)
|
---|
| 635 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 636 | fOpFound = true;
|
---|
| 637 | break;
|
---|
| 638 | }
|
---|
| 639 | }
|
---|
| 640 |
|
---|
| 641 | if (!fOpFound)
|
---|
| 642 | {
|
---|
| 643 | for (unsigned i = 0; i < RT_ELEMENTS(g_aScriptPunctuators); i++)
|
---|
| 644 | {
|
---|
| 645 | if (!RTStrNCmp(g_aScriptPunctuators[i].pszOp, pTokenizer->pszInput, g_aScriptPunctuators[i].cchOp))
|
---|
| 646 | {
|
---|
[62732] | 647 | pToken->Pos.iChEnd += (unsigned)g_aScriptPunctuators[i].cchOp;
|
---|
[44811] | 648 | pToken->enmClass = VDTOKENCLASS_PUNCTUATOR;
|
---|
| 649 | pToken->Class.Punctuator.chPunctuator = *g_aScriptPunctuators[i].pszOp;
|
---|
| 650 |
|
---|
| 651 | vdScriptTokenizerSkipCh(pTokenizer);
|
---|
| 652 | break;
|
---|
| 653 | }
|
---|
| 654 | }
|
---|
| 655 | }
|
---|
| 656 | }
|
---|
| 657 |
|
---|
| 658 | /**
|
---|
| 659 | * Read the next token from the tokenizer stream.
|
---|
| 660 | *
|
---|
| 661 | * @param pTokenizer The tokenizer to read from.
|
---|
| 662 | * @param pToken Uninitialized token to fill the token data into.
|
---|
| 663 | */
|
---|
| 664 | static void vdScriptTokenizerReadNextToken(PVDTOKENIZER pTokenizer, PVDSCRIPTTOKEN pToken)
|
---|
| 665 | {
|
---|
| 666 | /* Skip all eventually existing whitespace, newlines and comments first. */
|
---|
| 667 | vdScriptTokenizerSkipWhitespace(pTokenizer);
|
---|
| 668 |
|
---|
| 669 | char ch = vdScriptTokenizerGetCh(pTokenizer);
|
---|
| 670 | if (RT_C_IS_ALPHA(ch) || ch == '_')
|
---|
| 671 | vdScriptTokenizerGetIdeOrKeyword(pTokenizer, pToken);
|
---|
| 672 | else if (RT_C_IS_DIGIT(ch))
|
---|
| 673 | vdScriptTokenizerGetNumberConst(pTokenizer, pToken);
|
---|
| 674 | else if (ch == '\"')
|
---|
| 675 | vdScriptTokenizerGetStringConst(pTokenizer, pToken);
|
---|
| 676 | else if (ch == '\0')
|
---|
| 677 | vdScriptTokenizerGetEos(pTokenizer, pToken);
|
---|
| 678 | else
|
---|
| 679 | vdScriptTokenizerGetOperatorOrPunctuator(pTokenizer, pToken);
|
---|
| 680 | }
|
---|
| 681 |
|
---|
| 682 | /**
|
---|
| 683 | * Create a new tokenizer.
|
---|
| 684 | *
|
---|
| 685 | * @returns Pointer to the new tokenizer state on success.
|
---|
| 686 | * NULL if out of memory.
|
---|
| 687 | * @param pszInput The input to create the tokenizer for.
|
---|
| 688 | */
|
---|
| 689 | static PVDTOKENIZER vdScriptTokenizerCreate(const char *pszInput)
|
---|
| 690 | {
|
---|
| 691 | PVDTOKENIZER pTokenizer = (PVDTOKENIZER)RTMemAllocZ(sizeof(VDTOKENIZER));
|
---|
| 692 | if (pTokenizer)
|
---|
| 693 | {
|
---|
| 694 | pTokenizer->pszInput = pszInput;
|
---|
| 695 | pTokenizer->Pos.iLine = 1;
|
---|
| 696 | pTokenizer->Pos.iChStart = 1;
|
---|
| 697 | pTokenizer->Pos.iChEnd = 1;
|
---|
| 698 | pTokenizer->pTokenCurr = &pTokenizer->Token1;
|
---|
| 699 | pTokenizer->pTokenNext = &pTokenizer->Token2;
|
---|
| 700 | /* Fill the tokenizer with two first tokens. */
|
---|
| 701 | vdScriptTokenizerReadNextToken(pTokenizer, pTokenizer->pTokenCurr);
|
---|
| 702 | vdScriptTokenizerReadNextToken(pTokenizer, pTokenizer->pTokenNext);
|
---|
| 703 | }
|
---|
| 704 |
|
---|
| 705 | return pTokenizer;
|
---|
| 706 | }
|
---|
| 707 |
|
---|
[62873] | 708 | #if 0 /** @todo unused */
|
---|
[44811] | 709 | /**
|
---|
| 710 | * Destroys a given tokenizer state.
|
---|
| 711 | *
|
---|
| 712 | * @param pTokenizer The tokenizer to destroy.
|
---|
| 713 | */
|
---|
| 714 | static void vdScriptTokenizerDestroy(PVDTOKENIZER pTokenizer)
|
---|
| 715 | {
|
---|
| 716 | RTMemFree(pTokenizer);
|
---|
| 717 | }
|
---|
[62873] | 718 | #endif
|
---|
[44811] | 719 |
|
---|
| 720 | /**
|
---|
| 721 | * Get the current token in the input stream.
|
---|
| 722 | *
|
---|
| 723 | * @returns Pointer to the next token in the stream.
|
---|
| 724 | * @param pTokenizer The tokenizer to destroy.
|
---|
| 725 | */
|
---|
| 726 | DECLINLINE(PCVDSCRIPTTOKEN) vdScriptTokenizerGetToken(PVDTOKENIZER pTokenizer)
|
---|
| 727 | {
|
---|
| 728 | return pTokenizer->pTokenCurr;
|
---|
| 729 | }
|
---|
| 730 |
|
---|
| 731 | /**
|
---|
| 732 | * Get the class of the current token.
|
---|
| 733 | *
|
---|
| 734 | * @returns Class of the current token.
|
---|
| 735 | * @param pTokenizer The tokenizer state.
|
---|
| 736 | */
|
---|
| 737 | DECLINLINE(VDTOKENCLASS) vdScriptTokenizerGetTokenClass(PVDTOKENIZER pTokenizer)
|
---|
| 738 | {
|
---|
| 739 | return pTokenizer->pTokenCurr->enmClass;
|
---|
| 740 | }
|
---|
| 741 |
|
---|
| 742 | /**
|
---|
| 743 | * Returns the token class of the next token in the stream.
|
---|
| 744 | *
|
---|
| 745 | * @returns Token class of the next token.
|
---|
| 746 | * @param pTokenizer The tokenizer state.
|
---|
| 747 | */
|
---|
| 748 | DECLINLINE(VDTOKENCLASS) vdScriptTokenizerPeekNextClass(PVDTOKENIZER pTokenizer)
|
---|
| 749 | {
|
---|
| 750 | return pTokenizer->pTokenNext->enmClass;
|
---|
| 751 | }
|
---|
| 752 |
|
---|
| 753 | /**
|
---|
| 754 | * Consume the current token advancing to the next in the stream.
|
---|
| 755 | *
|
---|
| 756 | * @param pTokenizer The tokenizer state.
|
---|
| 757 | */
|
---|
| 758 | static void vdScriptTokenizerConsume(PVDTOKENIZER pTokenizer)
|
---|
| 759 | {
|
---|
| 760 | PVDSCRIPTTOKEN pTokenTmp = pTokenizer->pTokenCurr;
|
---|
| 761 |
|
---|
| 762 | /* Switch next token to current token and read in the next token. */
|
---|
| 763 | pTokenizer->pTokenCurr = pTokenizer->pTokenNext;
|
---|
| 764 | pTokenizer->pTokenNext = pTokenTmp;
|
---|
| 765 | vdScriptTokenizerReadNextToken(pTokenizer, pTokenizer->pTokenNext);
|
---|
| 766 | }
|
---|
| 767 |
|
---|
| 768 | /**
|
---|
| 769 | * Check whether the next token in the input stream is a punctuator and matches the given
|
---|
| 770 | * character.
|
---|
| 771 | *
|
---|
| 772 | * @returns true if the token matched.
|
---|
| 773 | * false otherwise.
|
---|
| 774 | * @param pTokenizer The tokenizer state.
|
---|
| 775 | * @param chCheck The punctuator to check against.
|
---|
| 776 | */
|
---|
| 777 | static bool vdScriptTokenizerIsPunctuatorEqual(PVDTOKENIZER pTokenizer, char chCheck)
|
---|
| 778 | {
|
---|
| 779 | PCVDSCRIPTTOKEN pToken = vdScriptTokenizerGetToken(pTokenizer);
|
---|
| 780 |
|
---|
| 781 | if ( pToken->enmClass == VDTOKENCLASS_PUNCTUATOR
|
---|
| 782 | && pToken->Class.Punctuator.chPunctuator == chCheck)
|
---|
| 783 | return true;
|
---|
| 784 |
|
---|
| 785 | return false;
|
---|
| 786 | }
|
---|
| 787 |
|
---|
| 788 | /**
|
---|
| 789 | * Check whether the next token in the input stream is a punctuator and matches the given
|
---|
| 790 | * character and skips it.
|
---|
| 791 | *
|
---|
| 792 | * @returns true if the token matched and was skipped.
|
---|
| 793 | * false otherwise.
|
---|
| 794 | * @param pTokenizer The tokenizer state.
|
---|
| 795 | * @param chCheck The punctuator to check against.
|
---|
| 796 | */
|
---|
| 797 | static bool vdScriptTokenizerSkipIfIsPunctuatorEqual(PVDTOKENIZER pTokenizer, char chCheck)
|
---|
| 798 | {
|
---|
| 799 | bool fEqual = vdScriptTokenizerIsPunctuatorEqual(pTokenizer, chCheck);
|
---|
| 800 | if (fEqual)
|
---|
| 801 | vdScriptTokenizerConsume(pTokenizer);
|
---|
| 802 |
|
---|
| 803 | return fEqual;
|
---|
| 804 | }
|
---|
| 805 |
|
---|
| 806 | /**
|
---|
| 807 | * Check whether the next token in the input stream is a keyword and matches the given
|
---|
| 808 | * keyword.
|
---|
| 809 | *
|
---|
| 810 | * @returns true if the token matched.
|
---|
| 811 | * false otherwise.
|
---|
| 812 | * @param pTokenizer The tokenizer state.
|
---|
| 813 | * @param enmKey The keyword to check against.
|
---|
| 814 | */
|
---|
| 815 | static bool vdScriptTokenizerIsKeywordEqual(PVDTOKENIZER pTokenizer, VDSCRIPTTOKENKEYWORD enmKeyword)
|
---|
| 816 | {
|
---|
| 817 | PCVDSCRIPTTOKEN pToken = vdScriptTokenizerGetToken(pTokenizer);
|
---|
| 818 |
|
---|
| 819 | if ( pToken->enmClass == VDTOKENCLASS_KEYWORD
|
---|
| 820 | && pToken->Class.Keyword.enmKeyword == enmKeyword)
|
---|
| 821 | return true;
|
---|
| 822 |
|
---|
| 823 | return false;
|
---|
| 824 | }
|
---|
| 825 |
|
---|
| 826 | /**
|
---|
| 827 | * Check whether the next token in the input stream is a keyword and matches the given
|
---|
| 828 | * keyword and skips it.
|
---|
| 829 | *
|
---|
| 830 | * @returns true if the token matched and was skipped.
|
---|
| 831 | * false otherwise.
|
---|
| 832 | * @param pTokenizer The tokenizer state.
|
---|
| 833 | * @param enmKey The keyword to check against.
|
---|
| 834 | */
|
---|
| 835 | static bool vdScriptTokenizerSkipIfIsKeywordEqual(PVDTOKENIZER pTokenizer, VDSCRIPTTOKENKEYWORD enmKeyword)
|
---|
| 836 | {
|
---|
| 837 | bool fEqual = vdScriptTokenizerIsKeywordEqual(pTokenizer, enmKeyword);
|
---|
| 838 | if (fEqual)
|
---|
| 839 | vdScriptTokenizerConsume(pTokenizer);
|
---|
| 840 |
|
---|
| 841 | return fEqual;
|
---|
| 842 | }
|
---|
| 843 |
|
---|
| 844 | /**
|
---|
[44840] | 845 | * Check whether the next token in the input stream is a keyword and matches the given
|
---|
| 846 | * keyword.
|
---|
| 847 | *
|
---|
| 848 | * @returns true if the token matched.
|
---|
| 849 | * false otherwise.
|
---|
| 850 | * @param pTokenizer The tokenizer state.
|
---|
| 851 | * @param pszOp The operation to check against.
|
---|
| 852 | */
|
---|
| 853 | static bool vdScriptTokenizerIsOperatorEqual(PVDTOKENIZER pTokenizer, const char *pszOp)
|
---|
| 854 | {
|
---|
| 855 | PCVDSCRIPTTOKEN pToken = vdScriptTokenizerGetToken(pTokenizer);
|
---|
| 856 |
|
---|
| 857 | if ( pToken->enmClass == VDTOKENCLASS_OPERATORS
|
---|
| 858 | && !RTStrCmp(pToken->Class.Operator.aszOp, pszOp))
|
---|
| 859 | return true;
|
---|
| 860 |
|
---|
| 861 | return false;
|
---|
| 862 | }
|
---|
| 863 |
|
---|
| 864 | /**
|
---|
| 865 | * Check whether the next token in the input stream is an operator and matches the given
|
---|
| 866 | * keyword and skips it.
|
---|
| 867 | *
|
---|
| 868 | * @returns true if the token matched and was skipped.
|
---|
| 869 | * false otherwise.
|
---|
| 870 | * @param pTokenizer The tokenizer state.
|
---|
| 871 | * @param pszOp The operation to check against.
|
---|
| 872 | */
|
---|
| 873 | static bool vdScriptTokenizerSkipIfIsOperatorEqual(PVDTOKENIZER pTokenizer, const char *pszOp)
|
---|
| 874 | {
|
---|
| 875 | bool fEqual = vdScriptTokenizerIsOperatorEqual(pTokenizer, pszOp);
|
---|
| 876 | if (fEqual)
|
---|
| 877 | vdScriptTokenizerConsume(pTokenizer);
|
---|
| 878 |
|
---|
| 879 | return fEqual;
|
---|
| 880 | }
|
---|
| 881 |
|
---|
| 882 | /**
|
---|
[44811] | 883 | * Record an error while parsing.
|
---|
| 884 | *
|
---|
| 885 | * @returns VBox status code passed.
|
---|
| 886 | */
|
---|
| 887 | static int vdScriptParserError(PVDSCRIPTCTXINT pThis, int rc, RT_SRC_POS_DECL, const char *pszFmt, ...)
|
---|
| 888 | {
|
---|
[62732] | 889 | RT_NOREF1(pThis); RT_SRC_POS_NOREF();
|
---|
| 890 | va_list va;
|
---|
| 891 | va_start(va, pszFmt);
|
---|
| 892 | RTPrintfV(pszFmt, va);
|
---|
| 893 | va_end(va);
|
---|
[44811] | 894 | return rc;
|
---|
| 895 | }
|
---|
| 896 |
|
---|
| 897 | /**
|
---|
| 898 | * Puts the next identifier AST node on the stack.
|
---|
| 899 | *
|
---|
| 900 | * @returns VBox status code.
|
---|
| 901 | * @param pThis The script context.
|
---|
| 902 | * @param ppAstNodeIde Where to store the identifier AST node on success.
|
---|
| 903 | */
|
---|
| 904 | static int vdScriptParseIde(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTIDE *ppAstNodeIde)
|
---|
| 905 | {
|
---|
| 906 | int rc = VINF_SUCCESS;
|
---|
| 907 | PCVDSCRIPTTOKEN pToken;
|
---|
| 908 |
|
---|
| 909 | LogFlowFunc(("pThis=%p ppAstNodeIde=%p\n", pThis, ppAstNodeIde));
|
---|
| 910 |
|
---|
| 911 | pToken = vdScriptTokenizerGetToken(pThis->pTokenizer);
|
---|
| 912 | if (pToken->enmClass != VDTOKENCLASS_IDENTIFIER)
|
---|
| 913 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected identifer got...\n");
|
---|
| 914 | else
|
---|
| 915 | {
|
---|
| 916 | /* Create new AST node and push onto stack. */
|
---|
| 917 | PVDSCRIPTASTIDE pAstNodeIde = vdScriptAstNodeIdeAlloc(pToken->Class.Ide.cchIde);
|
---|
| 918 | if (pAstNodeIde)
|
---|
| 919 | {
|
---|
| 920 | rc = RTStrCopyEx(pAstNodeIde->aszIde, pToken->Class.Ide.cchIde + 1, pToken->Class.Ide.pszIde, pToken->Class.Ide.cchIde);
|
---|
| 921 | AssertRC(rc);
|
---|
[62732] | 922 | pAstNodeIde->cchIde = (unsigned)pToken->Class.Ide.cchIde;
|
---|
[44811] | 923 |
|
---|
| 924 | *ppAstNodeIde = pAstNodeIde;
|
---|
[44840] | 925 | vdScriptTokenizerConsume(pThis->pTokenizer);
|
---|
[44811] | 926 | }
|
---|
| 927 | else
|
---|
| 928 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating identifier AST node\n");
|
---|
| 929 | }
|
---|
| 930 |
|
---|
| 931 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
| 932 | return rc;
|
---|
| 933 | }
|
---|
| 934 |
|
---|
| 935 | /**
|
---|
[44840] | 936 | * Parse a primary expression.
|
---|
| 937 | *
|
---|
| 938 | * @returns VBox status code.
|
---|
| 939 | * @param pThis The script context.
|
---|
| 940 | * @param ppAstNodeExpr Where to store the primary expression on success.
|
---|
| 941 | */
|
---|
| 942 | static int vdScriptParsePrimaryExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 943 | {
|
---|
| 944 | int rc = VINF_SUCCESS;
|
---|
| 945 |
|
---|
[56999] | 946 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 947 |
|
---|
[44840] | 948 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 949 | {
|
---|
| 950 | rc = vdScriptParseExpression(pThis, ppAstNodeExpr);
|
---|
| 951 | if (RT_SUCCESS(rc)
|
---|
| 952 | && !vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 953 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \")\", got ...\n");
|
---|
| 954 | }
|
---|
| 955 | else
|
---|
| 956 | {
|
---|
| 957 | PVDSCRIPTASTEXPR pExpr = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 958 | if (pExpr)
|
---|
| 959 | {
|
---|
| 960 | if (vdScriptTokenizerGetTokenClass(pThis->pTokenizer) == VDTOKENCLASS_IDENTIFIER)
|
---|
| 961 | {
|
---|
| 962 | PVDSCRIPTASTIDE pIde = NULL;
|
---|
| 963 | rc = vdScriptParseIde(pThis, &pIde);
|
---|
| 964 | if (RT_SUCCESS(rc))
|
---|
| 965 | {
|
---|
| 966 | pExpr->enmType = VDSCRIPTEXPRTYPE_PRIMARY_IDENTIFIER;
|
---|
| 967 | pExpr->pIde = pIde;
|
---|
| 968 | }
|
---|
| 969 | }
|
---|
| 970 | else if (vdScriptTokenizerGetTokenClass(pThis->pTokenizer) == VDTOKENCLASS_NUMCONST)
|
---|
| 971 | {
|
---|
| 972 | PCVDSCRIPTTOKEN pToken = vdScriptTokenizerGetToken(pThis->pTokenizer);
|
---|
| 973 | pExpr->enmType = VDSCRIPTEXPRTYPE_PRIMARY_NUMCONST;
|
---|
| 974 | pExpr->u64 = pToken->Class.NumConst.u64;
|
---|
| 975 | vdScriptTokenizerConsume(pThis->pTokenizer);
|
---|
| 976 | }
|
---|
| 977 | else if (vdScriptTokenizerGetTokenClass(pThis->pTokenizer) == VDTOKENCLASS_STRINGCONST)
|
---|
| 978 | {
|
---|
| 979 | PCVDSCRIPTTOKEN pToken = vdScriptTokenizerGetToken(pThis->pTokenizer);
|
---|
| 980 | pExpr->enmType = VDSCRIPTEXPRTYPE_PRIMARY_STRINGCONST;
|
---|
[44941] | 981 | pExpr->pszStr = RTStrDupN(pToken->Class.StringConst.pszString, pToken->Class.StringConst.cchString);
|
---|
[44840] | 982 | vdScriptTokenizerConsume(pThis->pTokenizer);
|
---|
| 983 |
|
---|
| 984 | if (!pExpr->pszStr)
|
---|
| 985 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating string\n");
|
---|
| 986 | }
|
---|
[44941] | 987 | else if (vdScriptTokenizerGetTokenClass(pThis->pTokenizer) == VDTOKENCLASS_KEYWORD)
|
---|
| 988 | {
|
---|
| 989 | PCVDSCRIPTTOKEN pToken = vdScriptTokenizerGetToken(pThis->pTokenizer);
|
---|
| 990 | pExpr->enmType = VDSCRIPTEXPRTYPE_PRIMARY_BOOLEAN;
|
---|
| 991 |
|
---|
| 992 | if (pToken->Class.Keyword.enmKeyword == VDSCRIPTTOKENKEYWORD_TRUE)
|
---|
| 993 | pExpr->f = true;
|
---|
| 994 | else if (pToken->Class.Keyword.enmKeyword == VDSCRIPTTOKENKEYWORD_FALSE)
|
---|
| 995 | pExpr->f = false;
|
---|
| 996 | else
|
---|
| 997 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Unexpected keyword, expected true or false\n");
|
---|
| 998 | vdScriptTokenizerConsume(pThis->pTokenizer);
|
---|
| 999 | }
|
---|
[44840] | 1000 | else
|
---|
| 1001 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"(\" | identifier | constant | string, got ...\n");
|
---|
| 1002 |
|
---|
| 1003 | if (RT_FAILURE(rc))
|
---|
| 1004 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1005 | else
|
---|
| 1006 | *ppAstNodeExpr = pExpr;
|
---|
| 1007 | }
|
---|
| 1008 | else
|
---|
| 1009 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1010 | }
|
---|
| 1011 |
|
---|
[44842] | 1012 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1013 | return rc;
|
---|
| 1014 | }
|
---|
| 1015 |
|
---|
| 1016 | /**
|
---|
| 1017 | * Parse an argument list for a function call.
|
---|
| 1018 | *
|
---|
| 1019 | * @returns VBox status code.
|
---|
| 1020 | * @param pThis The script context.
|
---|
| 1021 | * @param pFnCall The function call AST node.
|
---|
| 1022 | */
|
---|
| 1023 | static int vdScriptParseFnCallArgumentList(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR pFnCall)
|
---|
| 1024 | {
|
---|
| 1025 | int rc = VINF_SUCCESS;
|
---|
| 1026 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1027 |
|
---|
[56999] | 1028 | LogFlowFunc(("pThis=%p pFnCall=%p\n", pThis, pFnCall));
|
---|
[44842] | 1029 |
|
---|
[44840] | 1030 | rc = vdScriptParseAssignmentExpression(pThis, &pExpr);
|
---|
| 1031 | if (RT_SUCCESS(rc))
|
---|
| 1032 | {
|
---|
| 1033 | RTListAppend(&pFnCall->FnCall.ListArgs, &pExpr->Core.ListNode);
|
---|
| 1034 | while (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ','))
|
---|
| 1035 | {
|
---|
| 1036 | rc = vdScriptParseAssignmentExpression(pThis, &pExpr);
|
---|
| 1037 | if (RT_SUCCESS(rc))
|
---|
| 1038 | RTListAppend(&pFnCall->FnCall.ListArgs, &pExpr->Core.ListNode);
|
---|
| 1039 | else
|
---|
| 1040 | break;
|
---|
| 1041 | }
|
---|
| 1042 | if ( RT_SUCCESS(rc)
|
---|
| 1043 | && !vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 1044 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \")\", got ...\n");
|
---|
| 1045 | }
|
---|
| 1046 |
|
---|
[44842] | 1047 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1048 | return rc;
|
---|
| 1049 | }
|
---|
| 1050 |
|
---|
| 1051 | /**
|
---|
| 1052 | * Parse a postfix expression.
|
---|
| 1053 | *
|
---|
| 1054 | * @returns VBox status code.
|
---|
| 1055 | * @param pThis The script context.
|
---|
| 1056 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1057 | *
|
---|
| 1058 | * @note Syntax:
|
---|
| 1059 | * postfix-expression:
|
---|
| 1060 | * primary-expression
|
---|
| 1061 | * postfix-expression ( argument-expression )
|
---|
| 1062 | * postfix-expression ++
|
---|
| 1063 | * postfix-expression --
|
---|
[52371] | 1064 | * postfix-expression . identifier
|
---|
| 1065 | * postfix-expression -> identifier
|
---|
| 1066 | * @note: Not supported so far are:
|
---|
| 1067 | * ( type-name ) { initializer-list }
|
---|
| 1068 | * ( type-name ) { initializer-list , }
|
---|
[44840] | 1069 | */
|
---|
| 1070 | static int vdScriptParsePostfixExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1071 | {
|
---|
| 1072 | int rc = VINF_SUCCESS;
|
---|
| 1073 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1074 |
|
---|
[56999] | 1075 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1076 |
|
---|
[44840] | 1077 | rc = vdScriptParsePrimaryExpression(pThis, &pExpr);
|
---|
| 1078 | if (RT_SUCCESS(rc))
|
---|
| 1079 | {
|
---|
| 1080 | while (true)
|
---|
| 1081 | {
|
---|
| 1082 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1083 |
|
---|
| 1084 | if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "++"))
|
---|
| 1085 | {
|
---|
| 1086 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1087 | if (pExprNew)
|
---|
| 1088 | {
|
---|
| 1089 | pExprNew->enmType = VDSCRIPTEXPRTYPE_POSTFIX_INCREMENT;
|
---|
| 1090 | pExprNew->pExpr = pExpr;
|
---|
| 1091 | pExpr = pExprNew;
|
---|
| 1092 | }
|
---|
| 1093 | else
|
---|
| 1094 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1095 | }
|
---|
| 1096 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "--"))
|
---|
| 1097 | {
|
---|
| 1098 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1099 | if (pExprNew)
|
---|
| 1100 | {
|
---|
| 1101 | pExprNew->enmType = VDSCRIPTEXPRTYPE_POSTFIX_DECREMENT;
|
---|
| 1102 | pExprNew->pExpr = pExpr;
|
---|
| 1103 | pExpr = pExprNew;
|
---|
| 1104 | }
|
---|
| 1105 | else
|
---|
| 1106 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1107 | }
|
---|
[52371] | 1108 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "->"))
|
---|
| 1109 | {
|
---|
| 1110 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1111 | if (pExprNew)
|
---|
| 1112 | {
|
---|
| 1113 | PVDSCRIPTASTIDE pIde = NULL;
|
---|
| 1114 | rc = vdScriptParseIde(pThis, &pIde);
|
---|
| 1115 | if (RT_SUCCESS(rc))
|
---|
| 1116 | {
|
---|
| 1117 | pExprNew->enmType = VDSCRIPTEXPRTYPE_POSTFIX_DEREFERENCE;
|
---|
| 1118 | pExprNew->Deref.pIde = pIde;
|
---|
| 1119 | pExprNew->Deref.pExpr = pExpr;
|
---|
| 1120 | pExpr = pExprNew;
|
---|
| 1121 | }
|
---|
| 1122 | else
|
---|
| 1123 | vdScriptAstNodeFree(&pExprNew->Core);
|
---|
| 1124 | }
|
---|
| 1125 | else
|
---|
| 1126 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1127 | }
|
---|
| 1128 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "."))
|
---|
| 1129 | {
|
---|
| 1130 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1131 | if (pExprNew)
|
---|
| 1132 | {
|
---|
| 1133 | PVDSCRIPTASTIDE pIde = NULL;
|
---|
| 1134 | rc = vdScriptParseIde(pThis, &pIde);
|
---|
| 1135 | if (RT_SUCCESS(rc))
|
---|
| 1136 | {
|
---|
| 1137 | pExprNew->enmType = VDSCRIPTEXPRTYPE_POSTFIX_DOT;
|
---|
| 1138 | pExprNew->Deref.pIde = pIde;
|
---|
| 1139 | pExprNew->Deref.pExpr = pExpr;
|
---|
| 1140 | pExpr = pExprNew;
|
---|
| 1141 | }
|
---|
| 1142 | else
|
---|
| 1143 | vdScriptAstNodeFree(&pExprNew->Core);
|
---|
| 1144 | }
|
---|
| 1145 | else
|
---|
| 1146 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1147 | }
|
---|
[44840] | 1148 | else if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 1149 | {
|
---|
| 1150 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1151 | if (pExprNew)
|
---|
| 1152 | {
|
---|
| 1153 | pExprNew->enmType = VDSCRIPTEXPRTYPE_POSTFIX_FNCALL;
|
---|
| 1154 | RTListInit(&pExprNew->FnCall.ListArgs);
|
---|
| 1155 | if (!vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 1156 | rc = vdScriptParseFnCallArgumentList(pThis, pExprNew);
|
---|
| 1157 | pExprNew->FnCall.pFnIde = pExpr;
|
---|
| 1158 | pExpr = pExprNew;
|
---|
| 1159 | }
|
---|
| 1160 | else
|
---|
| 1161 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1162 | }
|
---|
| 1163 | else
|
---|
| 1164 | break;
|
---|
| 1165 |
|
---|
| 1166 | if (RT_FAILURE(rc))
|
---|
| 1167 | break;
|
---|
| 1168 | }
|
---|
| 1169 |
|
---|
| 1170 | if (RT_SUCCESS(rc))
|
---|
| 1171 | *ppAstNodeExpr = pExpr;
|
---|
| 1172 | else
|
---|
| 1173 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1174 | }
|
---|
[44842] | 1175 |
|
---|
| 1176 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1177 | return rc;
|
---|
| 1178 | }
|
---|
| 1179 |
|
---|
| 1180 | /**
|
---|
| 1181 | * Parse an unary expression.
|
---|
| 1182 | *
|
---|
| 1183 | * @returns VBox status code.
|
---|
| 1184 | * @param pThis The script context.
|
---|
| 1185 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1186 | *
|
---|
| 1187 | * @note Syntax:
|
---|
| 1188 | * unary-expression:
|
---|
| 1189 | * postfix-expression
|
---|
| 1190 | * ++ unary-expression
|
---|
| 1191 | * -- unary-expression
|
---|
[52371] | 1192 | * + cast-expression
|
---|
| 1193 | * - cast-expression
|
---|
| 1194 | * ~ cast-expression
|
---|
| 1195 | * ! cast-expression
|
---|
| 1196 | * & cast-expression
|
---|
| 1197 | * * cast-expression
|
---|
[44840] | 1198 | */
|
---|
| 1199 | static int vdScriptParseUnaryExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1200 | {
|
---|
| 1201 | int rc = VINF_SUCCESS;
|
---|
| 1202 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1203 | PVDSCRIPTASTEXPR pExprTop = NULL;
|
---|
| 1204 |
|
---|
[56999] | 1205 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1206 |
|
---|
[63567] | 1207 | /** @todo Think about a more beautiful way of parsing this. */
|
---|
[44840] | 1208 | while (true)
|
---|
| 1209 | {
|
---|
[44842] | 1210 | bool fQuit = false;
|
---|
[52371] | 1211 | bool fCastExprFollows = false;
|
---|
[44840] | 1212 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
[52371] | 1213 | VDSCRIPTEXPRTYPE enmType = VDSCRIPTEXPRTYPE_INVALID;
|
---|
[44840] | 1214 |
|
---|
| 1215 | if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "++"))
|
---|
[52371] | 1216 | enmType = VDSCRIPTEXPRTYPE_UNARY_INCREMENT;
|
---|
[44840] | 1217 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "--"))
|
---|
[52371] | 1218 | enmType = VDSCRIPTEXPRTYPE_UNARY_DECREMENT;
|
---|
[44840] | 1219 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "+"))
|
---|
| 1220 | {
|
---|
[52371] | 1221 | enmType = VDSCRIPTEXPRTYPE_UNARY_POSSIGN;
|
---|
| 1222 | fCastExprFollows = true;
|
---|
[44840] | 1223 | }
|
---|
| 1224 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "-"))
|
---|
| 1225 | {
|
---|
[52371] | 1226 | enmType = VDSCRIPTEXPRTYPE_UNARY_NEGSIGN;
|
---|
| 1227 | fCastExprFollows = true;
|
---|
[44840] | 1228 | }
|
---|
| 1229 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "~"))
|
---|
| 1230 | {
|
---|
[52371] | 1231 | enmType = VDSCRIPTEXPRTYPE_UNARY_INVERT;
|
---|
| 1232 | fCastExprFollows = true;
|
---|
[44840] | 1233 | }
|
---|
| 1234 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "!"))
|
---|
| 1235 | {
|
---|
[52371] | 1236 | enmType = VDSCRIPTEXPRTYPE_UNARY_NEGATE;
|
---|
| 1237 | fCastExprFollows = true;
|
---|
| 1238 | }
|
---|
| 1239 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "&"))
|
---|
| 1240 | {
|
---|
| 1241 | enmType = VDSCRIPTEXPRTYPE_UNARY_REFERENCE;
|
---|
| 1242 | fCastExprFollows = true;
|
---|
| 1243 | }
|
---|
| 1244 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "*"))
|
---|
| 1245 | {
|
---|
| 1246 | enmType = VDSCRIPTEXPRTYPE_UNARY_DEREFERENCE;
|
---|
| 1247 | fCastExprFollows = true;
|
---|
| 1248 | }
|
---|
| 1249 |
|
---|
| 1250 | if (enmType != VDSCRIPTEXPRTYPE_INVALID)
|
---|
| 1251 | {
|
---|
[44840] | 1252 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1253 | if (pExprNew)
|
---|
[52371] | 1254 | pExprNew->enmType = enmType;
|
---|
[44840] | 1255 | else
|
---|
| 1256 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
[52371] | 1257 |
|
---|
| 1258 | if ( RT_SUCCESS(rc)
|
---|
| 1259 | && fCastExprFollows)
|
---|
| 1260 | {
|
---|
| 1261 | PVDSCRIPTASTEXPR pCastExpr = NULL;
|
---|
| 1262 |
|
---|
| 1263 | rc = vdScriptParseCastExpression(pThis, &pCastExpr);
|
---|
| 1264 | if (RT_SUCCESS(rc))
|
---|
| 1265 | pExprNew->pExpr = pCastExpr;
|
---|
| 1266 | else
|
---|
| 1267 | vdScriptAstNodeFree(&pExprNew->Core);
|
---|
| 1268 | fQuit = true;
|
---|
| 1269 | }
|
---|
[44840] | 1270 | }
|
---|
| 1271 | else
|
---|
| 1272 | {
|
---|
| 1273 | /* Must be a postfix expression. */
|
---|
| 1274 | rc = vdScriptParsePostfixExpression(pThis, &pExprNew);
|
---|
[44842] | 1275 | fQuit = true;
|
---|
[44840] | 1276 | }
|
---|
| 1277 |
|
---|
| 1278 | if (RT_SUCCESS(rc))
|
---|
| 1279 | {
|
---|
| 1280 | if (!pExprTop)
|
---|
| 1281 | {
|
---|
| 1282 | pExprTop = pExprNew;
|
---|
| 1283 | pExpr = pExprNew;
|
---|
| 1284 | }
|
---|
| 1285 | else
|
---|
| 1286 | {
|
---|
| 1287 | pExpr->pExpr = pExprNew;
|
---|
| 1288 | pExpr = pExprNew;
|
---|
| 1289 | }
|
---|
[44842] | 1290 | if (fQuit)
|
---|
| 1291 | break;
|
---|
[44840] | 1292 | }
|
---|
| 1293 | else
|
---|
| 1294 | break;
|
---|
| 1295 | }
|
---|
| 1296 |
|
---|
| 1297 | if (RT_SUCCESS(rc))
|
---|
| 1298 | *ppAstNodeExpr = pExprTop;
|
---|
| 1299 | else if (pExprTop)
|
---|
| 1300 | vdScriptAstNodeFree(&pExprTop->Core);
|
---|
| 1301 |
|
---|
[44842] | 1302 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1303 | return rc;
|
---|
| 1304 | }
|
---|
| 1305 |
|
---|
[62873] | 1306 | #if 0 /* unused */
|
---|
[44840] | 1307 | /**
|
---|
[52371] | 1308 | * Parse a storage class specifier.
|
---|
| 1309 | *
|
---|
| 1310 | * @param pThis The script context.
|
---|
| 1311 | * @param penmStorageClass Where to return the parsed storage classe.
|
---|
| 1312 | * Contains VDSCRIPTASTSTORAGECLASS_INVALID if no
|
---|
| 1313 | * valid storage class specifier was found.
|
---|
| 1314 | *
|
---|
| 1315 | * @note Syntax:
|
---|
| 1316 | * typedef
|
---|
| 1317 | * extern
|
---|
| 1318 | * static
|
---|
| 1319 | * auto
|
---|
| 1320 | * register
|
---|
| 1321 | */
|
---|
| 1322 | static void vdScriptParseStorageClassSpecifier(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTSTORAGECLASS penmStorageClass)
|
---|
| 1323 | {
|
---|
| 1324 | *penmStorageClass = VDSCRIPTASTSTORAGECLASS_INVALID;
|
---|
| 1325 |
|
---|
| 1326 | if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_TYPEDEF))
|
---|
| 1327 | *penmStorageClass = VDSCRIPTASTSTORAGECLASS_TYPEDEF;
|
---|
| 1328 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_EXTERN))
|
---|
| 1329 | *penmStorageClass = VDSCRIPTASTSTORAGECLASS_EXTERN;
|
---|
| 1330 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_STATIC))
|
---|
| 1331 | *penmStorageClass = VDSCRIPTASTSTORAGECLASS_STATIC;
|
---|
| 1332 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_AUTO))
|
---|
| 1333 | *penmStorageClass = VDSCRIPTASTSTORAGECLASS_AUTO;
|
---|
| 1334 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_REGISTER))
|
---|
| 1335 | *penmStorageClass = VDSCRIPTASTSTORAGECLASS_REGISTER;
|
---|
| 1336 | }
|
---|
[62873] | 1337 | #endif /* unused */
|
---|
[52371] | 1338 |
|
---|
[62873] | 1339 | #if 0 /* unused */
|
---|
[52371] | 1340 | /**
|
---|
| 1341 | * Parse a type qualifier.
|
---|
| 1342 | *
|
---|
| 1343 | * @param pThis The script context.
|
---|
| 1344 | * @param penmTypeQualifier Where to return the parsed type qualifier.
|
---|
| 1345 | * Contains VDSCRIPTASTTYPEQUALIFIER_INVALID if no
|
---|
| 1346 | * valid type qualifier was found.
|
---|
| 1347 | *
|
---|
| 1348 | * @note Syntax:
|
---|
| 1349 | * const
|
---|
| 1350 | * restrict
|
---|
| 1351 | * volatile
|
---|
| 1352 | */
|
---|
| 1353 | static void vdScriptParseTypeQualifier(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTTYPEQUALIFIER penmTypeQualifier)
|
---|
| 1354 | {
|
---|
| 1355 | *penmTypeQualifier = VDSCRIPTASTTYPEQUALIFIER_INVALID;
|
---|
| 1356 |
|
---|
| 1357 | if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_CONST))
|
---|
| 1358 | *penmTypeQualifier = VDSCRIPTASTTYPEQUALIFIER_CONST;
|
---|
| 1359 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_RESTRICT))
|
---|
| 1360 | *penmTypeQualifier = VDSCRIPTASTTYPEQUALIFIER_RESTRICT;
|
---|
| 1361 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_VOLATILE))
|
---|
| 1362 | *penmTypeQualifier = VDSCRIPTASTTYPEQUALIFIER_VOLATILE;
|
---|
| 1363 | }
|
---|
[62873] | 1364 | #endif /* unused */
|
---|
[52371] | 1365 |
|
---|
| 1366 | #if 0
|
---|
| 1367 | /**
|
---|
| 1368 | * Parse a struct or union specifier.
|
---|
| 1369 | *
|
---|
| 1370 | * @returns VBox status code.
|
---|
| 1371 | * @param pThis The script context.
|
---|
| 1372 | * @param ppAstTypeSpec Where to store the type specifier AST node on success.
|
---|
| 1373 | * @param enmTypeSpecifier The type specifier to identify whete this is a struct or a union.
|
---|
| 1374 | */
|
---|
| 1375 | static int vdScriptParseStructOrUnionSpecifier(PVDSCRIPTCTXINT pThis, , enmTypeSpecifier)
|
---|
| 1376 | {
|
---|
| 1377 | int rc = VINF_SUCCESS;
|
---|
| 1378 |
|
---|
| 1379 | return rc;
|
---|
| 1380 | }
|
---|
| 1381 |
|
---|
| 1382 | /**
|
---|
| 1383 | * Parse a type specifier.
|
---|
| 1384 | *
|
---|
| 1385 | * @returns VBox status code.
|
---|
| 1386 | * @param pThis The script context.
|
---|
| 1387 | * @param ppAstTypeSpec Where to store the type specifier AST node on success.
|
---|
| 1388 | *
|
---|
| 1389 | * @note Syntax:
|
---|
| 1390 | * struct-or-union-specifier
|
---|
| 1391 | * enum-specifier
|
---|
| 1392 | * typedef-name (identifier: includes void, bool, uint8_t, int8_t, ... for basic integer types)
|
---|
| 1393 | */
|
---|
| 1394 | static int vdScriptParseTypeSpecifier(PVDSCRIPTCTXINT pThis, )
|
---|
| 1395 | {
|
---|
| 1396 | int rc = VINF_SUCCESS;
|
---|
| 1397 |
|
---|
| 1398 | if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_STRUCT))
|
---|
| 1399 | rc = vdScriptParseStructOrUnionSpecifier(pThis, , VDSCRIPTASTTYPESPECIFIER_STRUCT);
|
---|
| 1400 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_UNION))
|
---|
| 1401 | rc = vdScriptParseStructOrUnionSpecifier(pThis, , VDSCRIPTASTTYPESPECIFIER_UNION);
|
---|
| 1402 | else
|
---|
| 1403 | {
|
---|
| 1404 | PVDSCRIPTASTIDE pIde = NULL;
|
---|
| 1405 |
|
---|
| 1406 | rc = vdScriptParseIde(pThis, &pIde);
|
---|
| 1407 | if (RT_SUCCESS(rc))
|
---|
| 1408 | {
|
---|
| 1409 | AssertMsgFailed(("TODO\n")); /* Parse identifier. */
|
---|
| 1410 | }
|
---|
| 1411 | }
|
---|
| 1412 |
|
---|
| 1413 | return rc;
|
---|
| 1414 | }
|
---|
| 1415 | #endif
|
---|
| 1416 |
|
---|
| 1417 | /**
|
---|
| 1418 | * Parse a cast expression.
|
---|
| 1419 | *
|
---|
| 1420 | * @returns VBox status code.
|
---|
| 1421 | * @param pThis The script context.
|
---|
| 1422 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1423 | *
|
---|
| 1424 | * @note Syntax:
|
---|
| 1425 | * cast-expression:
|
---|
| 1426 | * unary-expression
|
---|
| 1427 | * ( type-name ) cast-expression
|
---|
| 1428 | */
|
---|
| 1429 | static int vdScriptParseCastExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1430 | {
|
---|
| 1431 | int rc = VINF_SUCCESS;
|
---|
| 1432 |
|
---|
[56999] | 1433 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[52371] | 1434 |
|
---|
| 1435 | #if 0
|
---|
| 1436 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 1437 | {
|
---|
| 1438 | PVDSCRIPTASTTYPE pTypeName = NULL;
|
---|
| 1439 | rc = vdScriptParseTypeName(pThis, &pTypeName);
|
---|
| 1440 | if ( RT_SUCCESS(rc)
|
---|
| 1441 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 1442 | {
|
---|
| 1443 | PVDSCRIPTASTEXPR pExpr = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1444 | if (pExpr)
|
---|
| 1445 | {
|
---|
| 1446 | pExpr->enmType = VDSCRIPTEXPRTYPE_CAST;
|
---|
[63567] | 1447 | rc = vdScriptParseCastExpression(pThis, &pExpr->Cast.pExpr); /** @todo Kill recursion. */
|
---|
[52371] | 1448 | if (RT_SUCCESS(rc))
|
---|
| 1449 | pExpr->Cast.pTypeName = pTypeName;
|
---|
| 1450 | else
|
---|
| 1451 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1452 | }
|
---|
| 1453 | else
|
---|
| 1454 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1455 |
|
---|
| 1456 | if (RT_FAILURE(rc))
|
---|
| 1457 | vdScriptAstNodeFree(&pTypeName->Core);
|
---|
| 1458 | }
|
---|
| 1459 | else if (RT_SUCCESS(rc))
|
---|
| 1460 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \")\", got ...\n");
|
---|
| 1461 | }
|
---|
| 1462 | else
|
---|
| 1463 | #endif
|
---|
| 1464 | rc = vdScriptParseUnaryExpression(pThis, ppAstNodeExpr);
|
---|
| 1465 |
|
---|
| 1466 | return rc;
|
---|
| 1467 | }
|
---|
| 1468 |
|
---|
| 1469 | /**
|
---|
[44840] | 1470 | * Parse a multiplicative expression.
|
---|
| 1471 | *
|
---|
| 1472 | * @returns VBox status code.
|
---|
| 1473 | * @param pThis The script context.
|
---|
| 1474 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1475 | *
|
---|
| 1476 | * @note Syntax:
|
---|
| 1477 | * multiplicative-expression:
|
---|
[52371] | 1478 | * cast-expression
|
---|
| 1479 | * multiplicative-expression * cast-expression
|
---|
| 1480 | * multiplicative-expression / cast-expression
|
---|
| 1481 | * multiplicative-expression % cast-expression
|
---|
[44840] | 1482 | */
|
---|
| 1483 | static int vdScriptParseMultiplicativeExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1484 | {
|
---|
| 1485 | int rc = VINF_SUCCESS;
|
---|
| 1486 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1487 |
|
---|
[56999] | 1488 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1489 |
|
---|
[52371] | 1490 | rc = vdScriptParseCastExpression(pThis, &pExpr);
|
---|
[44840] | 1491 | if (RT_SUCCESS(rc))
|
---|
| 1492 | {
|
---|
| 1493 | while (RT_SUCCESS(rc))
|
---|
| 1494 | {
|
---|
[52371] | 1495 | VDSCRIPTEXPRTYPE enmType = VDSCRIPTEXPRTYPE_INVALID;
|
---|
| 1496 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1497 |
|
---|
[44840] | 1498 | if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "*"))
|
---|
[52371] | 1499 | enmType = VDSCRIPTEXPRTYPE_MULTIPLICATION;
|
---|
[44840] | 1500 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "/"))
|
---|
[52371] | 1501 | enmType = VDSCRIPTEXPRTYPE_DIVISION;
|
---|
[44840] | 1502 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "%"))
|
---|
[52371] | 1503 | enmType = VDSCRIPTEXPRTYPE_MODULUS;
|
---|
[44840] | 1504 | else
|
---|
| 1505 | break;
|
---|
| 1506 |
|
---|
[52371] | 1507 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1508 | if (pExprNew)
|
---|
| 1509 | pExprNew->enmType = enmType;
|
---|
| 1510 | else
|
---|
| 1511 | {
|
---|
| 1512 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1513 | break;
|
---|
| 1514 | }
|
---|
| 1515 |
|
---|
[44840] | 1516 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1517 | pExpr = pExprNew;
|
---|
[52371] | 1518 | rc = vdScriptParseCastExpression(pThis, &pExprNew);
|
---|
[44840] | 1519 | if (RT_SUCCESS(rc))
|
---|
| 1520 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1521 | }
|
---|
| 1522 |
|
---|
| 1523 | if (RT_SUCCESS(rc))
|
---|
| 1524 | *ppAstNodeExpr = pExpr;
|
---|
| 1525 | else
|
---|
| 1526 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1527 | }
|
---|
[44842] | 1528 |
|
---|
| 1529 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1530 | return rc;
|
---|
| 1531 | }
|
---|
| 1532 |
|
---|
| 1533 | /**
|
---|
| 1534 | * Parse a additive expression.
|
---|
| 1535 | *
|
---|
| 1536 | * @returns VBox status code.
|
---|
| 1537 | * @param pThis The script context.
|
---|
| 1538 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1539 | *
|
---|
| 1540 | * @note Syntax:
|
---|
| 1541 | * additive-expression:
|
---|
| 1542 | * multiplicative-expression
|
---|
| 1543 | * additive-expression + multiplicative-expression
|
---|
| 1544 | * additive-expression - multiplicative-expression
|
---|
| 1545 | */
|
---|
| 1546 | static int vdScriptParseAdditiveExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1547 | {
|
---|
| 1548 | int rc = VINF_SUCCESS;
|
---|
| 1549 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1550 |
|
---|
[56999] | 1551 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1552 |
|
---|
[44840] | 1553 | rc = vdScriptParseMultiplicativeExpression(pThis, &pExpr);
|
---|
| 1554 | if (RT_SUCCESS(rc))
|
---|
| 1555 | {
|
---|
| 1556 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1557 | while (RT_SUCCESS(rc))
|
---|
| 1558 | {
|
---|
| 1559 | if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "+"))
|
---|
| 1560 | {
|
---|
| 1561 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1562 | if (pExprNew)
|
---|
| 1563 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ADDITION;
|
---|
| 1564 | else
|
---|
| 1565 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1566 | }
|
---|
| 1567 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "-"))
|
---|
| 1568 | {
|
---|
| 1569 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1570 | if (pExprNew)
|
---|
| 1571 | pExprNew->enmType = VDSCRIPTEXPRTYPE_SUBTRACTION;
|
---|
| 1572 | else
|
---|
| 1573 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1574 | }
|
---|
| 1575 | else
|
---|
| 1576 | break;
|
---|
| 1577 |
|
---|
[103522] | 1578 | if (RT_FAILURE(rc))
|
---|
| 1579 | break;
|
---|
| 1580 |
|
---|
[44840] | 1581 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1582 | pExpr = pExprNew;
|
---|
| 1583 | rc = vdScriptParseMultiplicativeExpression(pThis, &pExprNew);
|
---|
| 1584 | if (RT_SUCCESS(rc))
|
---|
| 1585 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1586 | }
|
---|
| 1587 |
|
---|
| 1588 | if (RT_SUCCESS(rc))
|
---|
| 1589 | *ppAstNodeExpr = pExpr;
|
---|
| 1590 | else
|
---|
| 1591 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1592 | }
|
---|
[44842] | 1593 |
|
---|
| 1594 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1595 | return rc;
|
---|
| 1596 | }
|
---|
| 1597 |
|
---|
| 1598 | /**
|
---|
| 1599 | * Parse a shift expression.
|
---|
| 1600 | *
|
---|
| 1601 | * @returns VBox status code.
|
---|
| 1602 | * @param pThis The script context.
|
---|
| 1603 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1604 | *
|
---|
| 1605 | * @note Syntax:
|
---|
| 1606 | * shift-expression:
|
---|
| 1607 | * additive-expression
|
---|
| 1608 | * shift-expression << additive-expression
|
---|
| 1609 | * shift-expression >> additive-expression
|
---|
| 1610 | */
|
---|
| 1611 | static int vdScriptParseShiftExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1612 | {
|
---|
| 1613 | int rc = VINF_SUCCESS;
|
---|
| 1614 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1615 |
|
---|
[56999] | 1616 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1617 |
|
---|
[44840] | 1618 | rc = vdScriptParseAdditiveExpression(pThis, &pExpr);
|
---|
| 1619 | if (RT_SUCCESS(rc))
|
---|
| 1620 | {
|
---|
| 1621 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1622 | while (RT_SUCCESS(rc))
|
---|
| 1623 | {
|
---|
| 1624 | if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "<<"))
|
---|
| 1625 | {
|
---|
| 1626 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1627 | if (pExprNew)
|
---|
| 1628 | pExprNew->enmType = VDSCRIPTEXPRTYPE_LSL;
|
---|
| 1629 | else
|
---|
| 1630 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1631 | }
|
---|
| 1632 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, ">>"))
|
---|
| 1633 | {
|
---|
| 1634 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1635 | if (pExprNew)
|
---|
| 1636 | pExprNew->enmType = VDSCRIPTEXPRTYPE_LSR;
|
---|
| 1637 | else
|
---|
| 1638 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1639 | }
|
---|
| 1640 | else
|
---|
| 1641 | break;
|
---|
| 1642 |
|
---|
[103522] | 1643 | if (RT_FAILURE(rc))
|
---|
| 1644 | break;
|
---|
| 1645 |
|
---|
[44840] | 1646 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1647 | pExpr = pExprNew;
|
---|
| 1648 | rc = vdScriptParseAdditiveExpression(pThis, &pExprNew);
|
---|
| 1649 | if (RT_SUCCESS(rc))
|
---|
| 1650 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1651 | }
|
---|
| 1652 |
|
---|
| 1653 | if (RT_SUCCESS(rc))
|
---|
| 1654 | *ppAstNodeExpr = pExpr;
|
---|
| 1655 | else
|
---|
| 1656 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1657 | }
|
---|
[44842] | 1658 |
|
---|
| 1659 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1660 | return rc;
|
---|
| 1661 | }
|
---|
| 1662 |
|
---|
| 1663 | /**
|
---|
| 1664 | * Parse a relational expression.
|
---|
| 1665 | *
|
---|
| 1666 | * @returns VBox status code.
|
---|
| 1667 | * @param pThis The script context.
|
---|
| 1668 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1669 | *
|
---|
| 1670 | * @note Syntax:
|
---|
| 1671 | * relational-expression:
|
---|
| 1672 | * shift-expression
|
---|
| 1673 | * relational-expression < shift-expression
|
---|
| 1674 | * relational-expression > shift-expression
|
---|
| 1675 | * relational-expression >= shift-expression
|
---|
| 1676 | * relational-expression <= shift-expression
|
---|
| 1677 | */
|
---|
| 1678 | static int vdScriptParseRelationalExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1679 | {
|
---|
| 1680 | int rc = VINF_SUCCESS;
|
---|
| 1681 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1682 |
|
---|
[56999] | 1683 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1684 |
|
---|
[44840] | 1685 | rc = vdScriptParseShiftExpression(pThis, &pExpr);
|
---|
| 1686 | if (RT_SUCCESS(rc))
|
---|
| 1687 | {
|
---|
| 1688 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1689 | while (RT_SUCCESS(rc))
|
---|
| 1690 | {
|
---|
| 1691 | if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "<"))
|
---|
| 1692 | {
|
---|
| 1693 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1694 | if (pExprNew)
|
---|
| 1695 | pExprNew->enmType = VDSCRIPTEXPRTYPE_LOWER;
|
---|
| 1696 | else
|
---|
| 1697 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1698 | }
|
---|
| 1699 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, ">"))
|
---|
| 1700 | {
|
---|
| 1701 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1702 | if (pExprNew)
|
---|
| 1703 | pExprNew->enmType = VDSCRIPTEXPRTYPE_HIGHER;
|
---|
| 1704 | else
|
---|
| 1705 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1706 | }
|
---|
| 1707 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, ">="))
|
---|
| 1708 | {
|
---|
| 1709 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1710 | if (pExprNew)
|
---|
| 1711 | pExprNew->enmType = VDSCRIPTEXPRTYPE_HIGHEREQUAL;
|
---|
| 1712 | else
|
---|
| 1713 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1714 | }
|
---|
| 1715 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "<="))
|
---|
| 1716 | {
|
---|
| 1717 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1718 | if (pExprNew)
|
---|
| 1719 | pExprNew->enmType = VDSCRIPTEXPRTYPE_LOWEREQUAL;
|
---|
| 1720 | else
|
---|
| 1721 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1722 | }
|
---|
| 1723 | else
|
---|
| 1724 | break;
|
---|
| 1725 |
|
---|
[103522] | 1726 | if (RT_FAILURE(rc))
|
---|
| 1727 | break;
|
---|
| 1728 |
|
---|
[44840] | 1729 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1730 | pExpr = pExprNew;
|
---|
| 1731 | rc = vdScriptParseShiftExpression(pThis, &pExprNew);
|
---|
| 1732 | if (RT_SUCCESS(rc))
|
---|
| 1733 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1734 | }
|
---|
| 1735 |
|
---|
| 1736 | if (RT_SUCCESS(rc))
|
---|
| 1737 | *ppAstNodeExpr = pExpr;
|
---|
| 1738 | else
|
---|
| 1739 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1740 | }
|
---|
[44842] | 1741 |
|
---|
| 1742 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1743 | return rc;
|
---|
| 1744 | }
|
---|
| 1745 |
|
---|
| 1746 | /**
|
---|
| 1747 | * Parse a equality expression.
|
---|
| 1748 | *
|
---|
| 1749 | * @returns VBox status code.
|
---|
| 1750 | * @param pThis The script context.
|
---|
| 1751 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1752 | *
|
---|
| 1753 | * @note Syntax:
|
---|
| 1754 | * equality-expression:
|
---|
| 1755 | * relational-expression
|
---|
| 1756 | * equality-expression == relational-expression
|
---|
| 1757 | * equality-expression != relational-expression
|
---|
| 1758 | */
|
---|
| 1759 | static int vdScriptParseEqualityExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1760 | {
|
---|
| 1761 | int rc = VINF_SUCCESS;
|
---|
| 1762 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1763 |
|
---|
[56999] | 1764 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1765 |
|
---|
[44840] | 1766 | rc = vdScriptParseRelationalExpression(pThis, &pExpr);
|
---|
| 1767 | if (RT_SUCCESS(rc))
|
---|
| 1768 | {
|
---|
| 1769 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1770 | while (RT_SUCCESS(rc))
|
---|
| 1771 | {
|
---|
| 1772 | if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "=="))
|
---|
| 1773 | {
|
---|
| 1774 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1775 | if (pExprNew)
|
---|
| 1776 | pExprNew->enmType = VDSCRIPTEXPRTYPE_EQUAL;
|
---|
| 1777 | else
|
---|
| 1778 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1779 | }
|
---|
| 1780 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "!="))
|
---|
| 1781 | {
|
---|
| 1782 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1783 | if (pExprNew)
|
---|
| 1784 | pExprNew->enmType = VDSCRIPTEXPRTYPE_NOTEQUAL;
|
---|
| 1785 | else
|
---|
| 1786 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1787 | }
|
---|
| 1788 | else
|
---|
| 1789 | break;
|
---|
| 1790 |
|
---|
[103522] | 1791 | if (RT_FAILURE(rc))
|
---|
| 1792 | break;
|
---|
| 1793 |
|
---|
[44840] | 1794 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1795 | pExpr = pExprNew;
|
---|
| 1796 | rc = vdScriptParseRelationalExpression(pThis, &pExprNew);
|
---|
| 1797 | if (RT_SUCCESS(rc))
|
---|
| 1798 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1799 | }
|
---|
| 1800 |
|
---|
| 1801 | if (RT_SUCCESS(rc))
|
---|
| 1802 | *ppAstNodeExpr = pExpr;
|
---|
| 1803 | else
|
---|
| 1804 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1805 | }
|
---|
[44842] | 1806 |
|
---|
| 1807 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1808 | return rc;
|
---|
| 1809 | }
|
---|
| 1810 |
|
---|
| 1811 | /**
|
---|
| 1812 | * Parse a bitwise and expression.
|
---|
| 1813 | *
|
---|
| 1814 | * @returns VBox status code.
|
---|
| 1815 | * @param pThis The script context.
|
---|
| 1816 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1817 | *
|
---|
| 1818 | * @note Syntax:
|
---|
| 1819 | * and-expression:
|
---|
| 1820 | * equality-expression
|
---|
| 1821 | * and-expression & equality-expression
|
---|
| 1822 | */
|
---|
| 1823 | static int vdScriptParseBitwiseAndExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1824 | {
|
---|
| 1825 | int rc = VINF_SUCCESS;
|
---|
| 1826 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1827 |
|
---|
[56999] | 1828 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1829 |
|
---|
[44840] | 1830 | rc = vdScriptParseEqualityExpression(pThis, &pExpr);
|
---|
| 1831 | if (RT_SUCCESS(rc))
|
---|
| 1832 | {
|
---|
| 1833 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1834 | while ( RT_SUCCESS(rc)
|
---|
| 1835 | && vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "&"))
|
---|
| 1836 | {
|
---|
| 1837 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1838 | if (pExprNew)
|
---|
| 1839 | {
|
---|
| 1840 | pExprNew->enmType = VDSCRIPTEXPRTYPE_EQUAL;
|
---|
| 1841 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1842 | pExpr = pExprNew;
|
---|
| 1843 | rc = vdScriptParseEqualityExpression(pThis, &pExprNew);
|
---|
| 1844 | if (RT_SUCCESS(rc))
|
---|
| 1845 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1846 | }
|
---|
| 1847 | else
|
---|
| 1848 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1849 | }
|
---|
| 1850 |
|
---|
| 1851 | if (RT_SUCCESS(rc))
|
---|
| 1852 | *ppAstNodeExpr = pExpr;
|
---|
| 1853 | else
|
---|
| 1854 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1855 | }
|
---|
[44842] | 1856 |
|
---|
| 1857 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1858 | return rc;
|
---|
| 1859 | }
|
---|
| 1860 |
|
---|
| 1861 | /**
|
---|
| 1862 | * Parse a bitwise xor expression.
|
---|
| 1863 | *
|
---|
| 1864 | * @returns VBox status code.
|
---|
| 1865 | * @param pThis The script context.
|
---|
| 1866 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1867 | *
|
---|
| 1868 | * @note Syntax:
|
---|
| 1869 | * xor-expression:
|
---|
| 1870 | * and-expression
|
---|
| 1871 | * xor-expression ^ equality-expression
|
---|
| 1872 | */
|
---|
| 1873 | static int vdScriptParseBitwiseXorExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1874 | {
|
---|
| 1875 | int rc = VINF_SUCCESS;
|
---|
| 1876 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1877 |
|
---|
[56999] | 1878 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1879 |
|
---|
[44840] | 1880 | rc = vdScriptParseBitwiseAndExpression(pThis, &pExpr);
|
---|
| 1881 | if (RT_SUCCESS(rc))
|
---|
| 1882 | {
|
---|
| 1883 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1884 | while ( RT_SUCCESS(rc)
|
---|
| 1885 | && vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "^"))
|
---|
| 1886 | {
|
---|
| 1887 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1888 | if (pExprNew)
|
---|
| 1889 | {
|
---|
| 1890 | pExprNew->enmType = VDSCRIPTEXPRTYPE_BITWISE_XOR;
|
---|
| 1891 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1892 | pExpr = pExprNew;
|
---|
| 1893 | rc = vdScriptParseBitwiseAndExpression(pThis, &pExprNew);
|
---|
| 1894 | if (RT_SUCCESS(rc))
|
---|
| 1895 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1896 | }
|
---|
| 1897 | else
|
---|
| 1898 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1899 | }
|
---|
| 1900 |
|
---|
| 1901 | if (RT_SUCCESS(rc))
|
---|
| 1902 | *ppAstNodeExpr = pExpr;
|
---|
| 1903 | else
|
---|
| 1904 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1905 | }
|
---|
[44842] | 1906 |
|
---|
| 1907 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1908 | return rc;
|
---|
| 1909 | }
|
---|
| 1910 |
|
---|
| 1911 | /**
|
---|
| 1912 | * Parse a bitwise or expression.
|
---|
| 1913 | *
|
---|
| 1914 | * @returns VBox status code.
|
---|
| 1915 | * @param pThis The script context.
|
---|
| 1916 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1917 | *
|
---|
| 1918 | * @note Syntax:
|
---|
| 1919 | * or-expression:
|
---|
| 1920 | * xor-expression
|
---|
| 1921 | * or-expression | xor-expression
|
---|
| 1922 | */
|
---|
| 1923 | static int vdScriptParseBitwiseOrExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1924 | {
|
---|
| 1925 | int rc = VINF_SUCCESS;
|
---|
| 1926 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1927 |
|
---|
[56999] | 1928 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1929 |
|
---|
[44840] | 1930 | rc = vdScriptParseBitwiseXorExpression(pThis, &pExpr);
|
---|
| 1931 | if (RT_SUCCESS(rc))
|
---|
| 1932 | {
|
---|
| 1933 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1934 | while ( RT_SUCCESS(rc)
|
---|
| 1935 | && vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "|"))
|
---|
| 1936 | {
|
---|
| 1937 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1938 | if (pExprNew)
|
---|
| 1939 | {
|
---|
| 1940 | pExprNew->enmType = VDSCRIPTEXPRTYPE_BITWISE_OR;
|
---|
| 1941 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1942 | pExpr = pExprNew;
|
---|
| 1943 | rc = vdScriptParseBitwiseXorExpression(pThis, &pExprNew);
|
---|
| 1944 | if (RT_SUCCESS(rc))
|
---|
| 1945 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1946 | }
|
---|
| 1947 | else
|
---|
| 1948 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1949 | }
|
---|
| 1950 |
|
---|
| 1951 | if (RT_SUCCESS(rc))
|
---|
| 1952 | *ppAstNodeExpr = pExpr;
|
---|
| 1953 | else
|
---|
| 1954 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 1955 | }
|
---|
[44842] | 1956 |
|
---|
| 1957 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 1958 | return rc;
|
---|
| 1959 | }
|
---|
| 1960 |
|
---|
| 1961 | /**
|
---|
| 1962 | * Parse a logical and expression.
|
---|
| 1963 | *
|
---|
| 1964 | * @returns VBox status code.
|
---|
| 1965 | * @param pThis The script context.
|
---|
| 1966 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 1967 | *
|
---|
| 1968 | * @note Syntax:
|
---|
| 1969 | * logical-and-expression:
|
---|
| 1970 | * or-expression
|
---|
| 1971 | * logical-and-expression | or-expression
|
---|
| 1972 | */
|
---|
| 1973 | static int vdScriptParseLogicalAndExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 1974 | {
|
---|
| 1975 | int rc = VINF_SUCCESS;
|
---|
| 1976 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 1977 |
|
---|
[56999] | 1978 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 1979 |
|
---|
[44840] | 1980 | rc = vdScriptParseBitwiseOrExpression(pThis, &pExpr);
|
---|
| 1981 | if (RT_SUCCESS(rc))
|
---|
| 1982 | {
|
---|
| 1983 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 1984 | while ( RT_SUCCESS(rc)
|
---|
| 1985 | && vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "&&"))
|
---|
| 1986 | {
|
---|
| 1987 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 1988 | if (pExprNew)
|
---|
| 1989 | {
|
---|
| 1990 | pExprNew->enmType = VDSCRIPTEXPRTYPE_LOGICAL_AND;
|
---|
| 1991 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 1992 | pExpr = pExprNew;
|
---|
| 1993 | rc = vdScriptParseBitwiseOrExpression(pThis, &pExprNew);
|
---|
| 1994 | if (RT_SUCCESS(rc))
|
---|
| 1995 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 1996 | }
|
---|
| 1997 | else
|
---|
| 1998 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 1999 | }
|
---|
| 2000 |
|
---|
| 2001 | if (RT_SUCCESS(rc))
|
---|
| 2002 | *ppAstNodeExpr = pExpr;
|
---|
| 2003 | else
|
---|
| 2004 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 2005 | }
|
---|
[44842] | 2006 |
|
---|
| 2007 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 2008 | return rc;
|
---|
| 2009 | }
|
---|
| 2010 |
|
---|
| 2011 | /**
|
---|
| 2012 | * Parse a logical or expression.
|
---|
| 2013 | *
|
---|
| 2014 | * @returns VBox status code.
|
---|
| 2015 | * @param pThis The script context.
|
---|
| 2016 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 2017 | *
|
---|
| 2018 | * @note Syntax:
|
---|
| 2019 | * logical-or-expression:
|
---|
| 2020 | * logical-and-expression
|
---|
| 2021 | * logical-or-expression | logical-and-expression
|
---|
| 2022 | */
|
---|
| 2023 | static int vdScriptParseLogicalOrExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 2024 | {
|
---|
| 2025 | int rc = VINF_SUCCESS;
|
---|
| 2026 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 2027 |
|
---|
[56999] | 2028 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 2029 |
|
---|
[44840] | 2030 | rc = vdScriptParseLogicalAndExpression(pThis, &pExpr);
|
---|
| 2031 | if (RT_SUCCESS(rc))
|
---|
| 2032 | {
|
---|
| 2033 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 2034 | while ( RT_SUCCESS(rc)
|
---|
| 2035 | && vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "||"))
|
---|
| 2036 | {
|
---|
| 2037 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2038 | if (pExprNew)
|
---|
| 2039 | {
|
---|
| 2040 | pExprNew->enmType = VDSCRIPTEXPRTYPE_LOGICAL_OR;
|
---|
| 2041 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 2042 | pExpr = pExprNew;
|
---|
| 2043 | rc = vdScriptParseLogicalAndExpression(pThis, &pExprNew);
|
---|
| 2044 | if (RT_SUCCESS(rc))
|
---|
| 2045 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 2046 | }
|
---|
| 2047 | else
|
---|
| 2048 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2049 | }
|
---|
| 2050 |
|
---|
| 2051 | if (RT_SUCCESS(rc))
|
---|
| 2052 | *ppAstNodeExpr = pExpr;
|
---|
| 2053 | else
|
---|
| 2054 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 2055 | }
|
---|
[44842] | 2056 |
|
---|
| 2057 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44840] | 2058 | return rc;
|
---|
| 2059 | }
|
---|
| 2060 |
|
---|
| 2061 | /**
|
---|
[44811] | 2062 | * Parse a conditional expression.
|
---|
| 2063 | *
|
---|
| 2064 | * @returns VBox status code.
|
---|
| 2065 | * @param pThis The script context.
|
---|
| 2066 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
[44840] | 2067 | *
|
---|
| 2068 | * @note: VDScript doesn't support logical-or-expression ? expression : conditional-expression
|
---|
| 2069 | * so a conditional expression is equal to a logical-or-expression.
|
---|
[44811] | 2070 | */
|
---|
| 2071 | static int vdScriptParseCondExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 2072 | {
|
---|
[44840] | 2073 | return vdScriptParseLogicalOrExpression(pThis, ppAstNodeExpr);
|
---|
| 2074 | }
|
---|
| 2075 |
|
---|
[62873] | 2076 | #if 0 /* unused */
|
---|
[44840] | 2077 | /**
|
---|
[52371] | 2078 | * Parse a constant expression.
|
---|
| 2079 | *
|
---|
| 2080 | * @returns VBox status code.
|
---|
| 2081 | * @param pThis The script context.
|
---|
| 2082 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 2083 | *
|
---|
| 2084 | * @note Syntax:
|
---|
| 2085 | * constant-expression:
|
---|
| 2086 | * conditional-expression
|
---|
| 2087 | */
|
---|
| 2088 | static int vdScriptParseConstExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 2089 | {
|
---|
| 2090 | return vdScriptParseCondExpression(pThis, ppAstNodeExpr);
|
---|
| 2091 | }
|
---|
[62873] | 2092 | #endif
|
---|
[52371] | 2093 |
|
---|
| 2094 | /**
|
---|
[44840] | 2095 | * Parse an assignment expression.
|
---|
| 2096 | *
|
---|
| 2097 | * @returns VBox status code.
|
---|
| 2098 | * @param pThis The script context.
|
---|
| 2099 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
| 2100 | *
|
---|
| 2101 | * @note Syntax:
|
---|
| 2102 | * assignment-expression:
|
---|
| 2103 | * conditional-expression
|
---|
| 2104 | * unary-expression assignment-operator assignment-expression
|
---|
| 2105 | */
|
---|
| 2106 | static int vdScriptParseAssignmentExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 2107 | {
|
---|
| 2108 | int rc = VINF_SUCCESS;
|
---|
| 2109 | PVDSCRIPTASTEXPR pExpr;
|
---|
| 2110 |
|
---|
[56999] | 2111 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 2112 |
|
---|
[44840] | 2113 | rc = vdScriptParseLogicalOrExpression(pThis, &pExpr);
|
---|
| 2114 | if (RT_SUCCESS(rc))
|
---|
| 2115 | {
|
---|
| 2116 | PVDSCRIPTASTEXPR pExprNew = NULL;
|
---|
| 2117 | while (RT_SUCCESS(rc))
|
---|
| 2118 | {
|
---|
| 2119 | if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "="))
|
---|
| 2120 | {
|
---|
| 2121 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2122 | if (pExprNew)
|
---|
| 2123 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN;
|
---|
| 2124 | else
|
---|
| 2125 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2126 | }
|
---|
| 2127 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "*="))
|
---|
| 2128 | {
|
---|
| 2129 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2130 | if (pExprNew)
|
---|
| 2131 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_MULT;
|
---|
| 2132 | else
|
---|
| 2133 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2134 | }
|
---|
| 2135 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "/="))
|
---|
| 2136 | {
|
---|
| 2137 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2138 | if (pExprNew)
|
---|
| 2139 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_DIV;
|
---|
| 2140 | else
|
---|
| 2141 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2142 | }
|
---|
| 2143 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "%="))
|
---|
| 2144 | {
|
---|
| 2145 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2146 | if (pExprNew)
|
---|
| 2147 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_MOD;
|
---|
| 2148 | else
|
---|
| 2149 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2150 | }
|
---|
| 2151 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "+="))
|
---|
| 2152 | {
|
---|
| 2153 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2154 | if (pExprNew)
|
---|
| 2155 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_ADD;
|
---|
| 2156 | else
|
---|
| 2157 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2158 | }
|
---|
| 2159 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "-="))
|
---|
| 2160 | {
|
---|
| 2161 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2162 | if (pExprNew)
|
---|
| 2163 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_SUB;
|
---|
| 2164 | else
|
---|
| 2165 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2166 | }
|
---|
| 2167 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "<<="))
|
---|
| 2168 | {
|
---|
| 2169 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2170 | if (pExprNew)
|
---|
| 2171 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_LSL;
|
---|
| 2172 | else
|
---|
| 2173 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2174 | }
|
---|
| 2175 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, ">>="))
|
---|
| 2176 | {
|
---|
| 2177 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2178 | if (pExprNew)
|
---|
| 2179 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_LSR;
|
---|
| 2180 | else
|
---|
| 2181 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2182 | }
|
---|
| 2183 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "&="))
|
---|
| 2184 | {
|
---|
| 2185 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2186 | if (pExprNew)
|
---|
| 2187 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_AND;
|
---|
| 2188 | else
|
---|
| 2189 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2190 | }
|
---|
| 2191 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "^="))
|
---|
| 2192 | {
|
---|
| 2193 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2194 | if (pExprNew)
|
---|
| 2195 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_XOR;
|
---|
| 2196 | else
|
---|
| 2197 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2198 | }
|
---|
| 2199 | else if (vdScriptTokenizerSkipIfIsOperatorEqual(pThis->pTokenizer, "|="))
|
---|
| 2200 | {
|
---|
| 2201 | pExprNew = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2202 | if (pExprNew)
|
---|
| 2203 | pExprNew->enmType = VDSCRIPTEXPRTYPE_ASSIGN_OR;
|
---|
| 2204 | else
|
---|
| 2205 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2206 | }
|
---|
| 2207 | else
|
---|
| 2208 | break;
|
---|
| 2209 |
|
---|
[103522] | 2210 | if (RT_SUCCESS(rc))
|
---|
| 2211 | break;
|
---|
| 2212 |
|
---|
[44840] | 2213 | pExprNew->BinaryOp.pLeftExpr = pExpr;
|
---|
| 2214 | pExpr = pExprNew;
|
---|
| 2215 | rc = vdScriptParseLogicalOrExpression(pThis, &pExprNew);
|
---|
| 2216 | if (RT_SUCCESS(rc))
|
---|
| 2217 | pExpr->BinaryOp.pRightExpr = pExprNew;
|
---|
| 2218 | }
|
---|
| 2219 |
|
---|
| 2220 | if (RT_SUCCESS(rc))
|
---|
| 2221 | *ppAstNodeExpr = pExpr;
|
---|
| 2222 | else
|
---|
| 2223 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 2224 | }
|
---|
[44842] | 2225 |
|
---|
| 2226 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44811] | 2227 | return rc;
|
---|
| 2228 | }
|
---|
| 2229 |
|
---|
| 2230 | /**
|
---|
| 2231 | * Parse an expression.
|
---|
| 2232 | *
|
---|
| 2233 | * @returns VBox status code.
|
---|
| 2234 | * @param pThis The script context.
|
---|
| 2235 | * @param ppAstNodeExpr Where to store the expression AST node on success.
|
---|
[44840] | 2236 | *
|
---|
| 2237 | * @note Syntax:
|
---|
| 2238 | * expression:
|
---|
| 2239 | * assignment-expression
|
---|
| 2240 | * expression , assignment-expression
|
---|
[44811] | 2241 | */
|
---|
| 2242 | static int vdScriptParseExpression(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTEXPR *ppAstNodeExpr)
|
---|
| 2243 | {
|
---|
[44840] | 2244 | int rc = VINF_SUCCESS;
|
---|
| 2245 | PVDSCRIPTASTEXPR pAssignExpr = NULL;
|
---|
| 2246 |
|
---|
[56999] | 2247 | LogFlowFunc(("pThis=%p ppAstNodeExpr=%p\n", pThis, ppAstNodeExpr));
|
---|
[44842] | 2248 |
|
---|
[44840] | 2249 | rc = vdScriptParseAssignmentExpression(pThis, &pAssignExpr);
|
---|
| 2250 | if ( RT_SUCCESS(rc)
|
---|
| 2251 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ','))
|
---|
| 2252 | {
|
---|
| 2253 | PVDSCRIPTASTEXPR pListAssignExpr = (PVDSCRIPTASTEXPR)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_EXPRESSION);
|
---|
| 2254 | if (pListAssignExpr)
|
---|
| 2255 | {
|
---|
| 2256 | pListAssignExpr->enmType = VDSCRIPTEXPRTYPE_ASSIGNMENT_LIST;
|
---|
| 2257 | RTListInit(&pListAssignExpr->ListExpr);
|
---|
| 2258 | RTListAppend(&pListAssignExpr->ListExpr, &pAssignExpr->Core.ListNode);
|
---|
| 2259 | do
|
---|
| 2260 | {
|
---|
| 2261 | rc = vdScriptParseAssignmentExpression(pThis, &pAssignExpr);
|
---|
| 2262 | if (RT_SUCCESS(rc))
|
---|
| 2263 | RTListAppend(&pListAssignExpr->ListExpr, &pAssignExpr->Core.ListNode);
|
---|
| 2264 | } while ( RT_SUCCESS(rc)
|
---|
| 2265 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ','));
|
---|
| 2266 |
|
---|
| 2267 | if (RT_FAILURE(rc))
|
---|
| 2268 | vdScriptAstNodeFree(&pListAssignExpr->Core);
|
---|
| 2269 | else
|
---|
| 2270 | *ppAstNodeExpr = pListAssignExpr;
|
---|
| 2271 | }
|
---|
| 2272 | else
|
---|
| 2273 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating expression AST node\n");
|
---|
| 2274 | }
|
---|
| 2275 | else if (RT_SUCCESS(rc))
|
---|
| 2276 | *ppAstNodeExpr = pAssignExpr;
|
---|
| 2277 |
|
---|
[44842] | 2278 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
[44811] | 2279 | return rc;
|
---|
| 2280 | }
|
---|
| 2281 |
|
---|
| 2282 | /**
|
---|
| 2283 | * Parse an if statement.
|
---|
| 2284 | *
|
---|
| 2285 | * @returns VBox status code.
|
---|
| 2286 | * @param pThis The script context.
|
---|
| 2287 | * @param pAstNodeIf Uninitialized if AST node.
|
---|
| 2288 | *
|
---|
| 2289 | * @note The caller skipped the "if" token already.
|
---|
| 2290 | */
|
---|
| 2291 | static int vdScriptParseIf(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTIF pAstNodeIf)
|
---|
| 2292 | {
|
---|
| 2293 | int rc = VINF_SUCCESS;
|
---|
| 2294 |
|
---|
| 2295 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 2296 | {
|
---|
| 2297 | PVDSCRIPTASTEXPR pCondExpr = NULL;
|
---|
| 2298 | rc = vdScriptParseExpression(pThis, &pCondExpr);
|
---|
| 2299 | if (RT_SUCCESS(rc))
|
---|
| 2300 | {
|
---|
| 2301 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 2302 | {
|
---|
| 2303 | PVDSCRIPTASTSTMT pStmt = NULL;
|
---|
| 2304 | PVDSCRIPTASTSTMT pElseStmt = NULL;
|
---|
| 2305 | rc = vdScriptParseStatement(pThis, &pStmt);
|
---|
| 2306 | if ( RT_SUCCESS(rc)
|
---|
| 2307 | && vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_ELSE))
|
---|
| 2308 | rc = vdScriptParseStatement(pThis, &pElseStmt);
|
---|
| 2309 |
|
---|
| 2310 | if (RT_SUCCESS(rc))
|
---|
| 2311 | {
|
---|
| 2312 | pAstNodeIf->pCond = pCondExpr;
|
---|
| 2313 | pAstNodeIf->pTrueStmt = pStmt;
|
---|
| 2314 | pAstNodeIf->pElseStmt = pElseStmt;
|
---|
| 2315 | }
|
---|
| 2316 | else if (pStmt)
|
---|
| 2317 | vdScriptAstNodeFree(&pStmt->Core);
|
---|
| 2318 | }
|
---|
| 2319 | else
|
---|
| 2320 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \")\", got ...\n");
|
---|
| 2321 |
|
---|
| 2322 | if (RT_FAILURE(rc))
|
---|
| 2323 | vdScriptAstNodeFree(&pCondExpr->Core);
|
---|
| 2324 | }
|
---|
| 2325 | }
|
---|
| 2326 | else
|
---|
| 2327 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"(\", got ...\n");
|
---|
| 2328 |
|
---|
| 2329 | return rc;
|
---|
| 2330 | }
|
---|
| 2331 |
|
---|
| 2332 | /**
|
---|
| 2333 | * Parse a switch statement.
|
---|
| 2334 | *
|
---|
| 2335 | * @returns VBox status code.
|
---|
| 2336 | * @param pThis The script context.
|
---|
| 2337 | * @param pAstNodeSwitch Uninitialized switch AST node.
|
---|
| 2338 | *
|
---|
| 2339 | * @note The caller skipped the "switch" token already.
|
---|
| 2340 | */
|
---|
| 2341 | static int vdScriptParseSwitch(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTSWITCH pAstNodeSwitch)
|
---|
| 2342 | {
|
---|
| 2343 | int rc = VINF_SUCCESS;
|
---|
| 2344 |
|
---|
| 2345 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 2346 | {
|
---|
| 2347 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 2348 |
|
---|
| 2349 | rc = vdScriptParseExpression(pThis, &pExpr);
|
---|
| 2350 | if ( RT_SUCCESS(rc)
|
---|
| 2351 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 2352 | {
|
---|
| 2353 | PVDSCRIPTASTSTMT pStmt = NULL;
|
---|
| 2354 | rc = vdScriptParseStatement(pThis, &pStmt);
|
---|
| 2355 | if (RT_SUCCESS(rc))
|
---|
| 2356 | {
|
---|
| 2357 | pAstNodeSwitch->pCond = pExpr;
|
---|
| 2358 | pAstNodeSwitch->pStmt = pStmt;
|
---|
| 2359 | }
|
---|
| 2360 | else
|
---|
| 2361 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 2362 | }
|
---|
| 2363 | else if (RT_SUCCESS(rc))
|
---|
| 2364 | {
|
---|
| 2365 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \")\", got ...\n");
|
---|
| 2366 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 2367 | }
|
---|
| 2368 | }
|
---|
| 2369 | else
|
---|
| 2370 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"(\", got ...\n");
|
---|
| 2371 |
|
---|
| 2372 | return rc;
|
---|
| 2373 | }
|
---|
| 2374 |
|
---|
| 2375 | /**
|
---|
| 2376 | * Parse a while or do ... while statement.
|
---|
| 2377 | *
|
---|
| 2378 | * @returns VBox status code.
|
---|
| 2379 | * @param pThis The script context.
|
---|
| 2380 | * @param pAstNodeWhile Uninitialized while AST node.
|
---|
| 2381 | *
|
---|
| 2382 | * @note The caller skipped the "while" or "do" token already.
|
---|
| 2383 | */
|
---|
| 2384 | static int vdScriptParseWhile(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTWHILE pAstNodeWhile, bool fDoWhile)
|
---|
| 2385 | {
|
---|
| 2386 | int rc = VINF_SUCCESS;
|
---|
| 2387 |
|
---|
| 2388 | pAstNodeWhile->fDoWhile = fDoWhile;
|
---|
| 2389 |
|
---|
| 2390 | if (fDoWhile)
|
---|
| 2391 | {
|
---|
| 2392 | PVDSCRIPTASTSTMT pStmt = NULL;
|
---|
| 2393 | rc = vdScriptParseStatement(pThis, &pStmt);
|
---|
| 2394 | if ( RT_SUCCESS(rc)
|
---|
| 2395 | && vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_WHILE))
|
---|
| 2396 | {
|
---|
| 2397 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 2398 | {
|
---|
| 2399 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 2400 |
|
---|
| 2401 | rc = vdScriptParseExpression(pThis, &pExpr);
|
---|
| 2402 | if ( RT_SUCCESS(rc)
|
---|
| 2403 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 2404 | {
|
---|
[44964] | 2405 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ';'))
|
---|
| 2406 | {
|
---|
| 2407 | pAstNodeWhile->pCond = pExpr;
|
---|
| 2408 | pAstNodeWhile->pStmt = pStmt;
|
---|
| 2409 | }
|
---|
| 2410 | else
|
---|
| 2411 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \";\", got ...\n");
|
---|
[44811] | 2412 | }
|
---|
| 2413 | else if (RT_SUCCESS(rc))
|
---|
| 2414 | {
|
---|
| 2415 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \")\", got ...\n");
|
---|
| 2416 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 2417 | }
|
---|
| 2418 | }
|
---|
| 2419 | else
|
---|
| 2420 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"(\", got ...\n");
|
---|
| 2421 | }
|
---|
| 2422 | else if (RT_SUCCESS(rc))
|
---|
| 2423 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"while\", got ...\n");
|
---|
| 2424 |
|
---|
| 2425 | if ( RT_FAILURE(rc)
|
---|
| 2426 | && pStmt)
|
---|
| 2427 | vdScriptAstNodeFree(&pStmt->Core);
|
---|
| 2428 | }
|
---|
| 2429 | else
|
---|
| 2430 | {
|
---|
| 2431 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 2432 | {
|
---|
| 2433 | PVDSCRIPTASTEXPR pExpr = NULL;
|
---|
| 2434 |
|
---|
| 2435 | rc = vdScriptParseExpression(pThis, &pExpr);
|
---|
| 2436 | if ( RT_SUCCESS(rc)
|
---|
| 2437 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 2438 | {
|
---|
| 2439 | PVDSCRIPTASTSTMT pStmt = NULL;
|
---|
| 2440 | rc = vdScriptParseStatement(pThis, &pStmt);
|
---|
| 2441 | if (RT_SUCCESS(rc))
|
---|
| 2442 | {
|
---|
| 2443 | pAstNodeWhile->pCond = pExpr;
|
---|
| 2444 | pAstNodeWhile->pStmt = pStmt;
|
---|
| 2445 | }
|
---|
| 2446 | else
|
---|
| 2447 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 2448 | }
|
---|
| 2449 | else if (RT_SUCCESS(rc))
|
---|
| 2450 | {
|
---|
| 2451 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \")\", got ...\n");
|
---|
| 2452 | vdScriptAstNodeFree(&pExpr->Core);
|
---|
| 2453 | }
|
---|
| 2454 | }
|
---|
| 2455 | else
|
---|
| 2456 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"(\", got ...\n");
|
---|
| 2457 | }
|
---|
| 2458 |
|
---|
| 2459 | return rc;
|
---|
| 2460 | }
|
---|
| 2461 |
|
---|
| 2462 | /**
|
---|
| 2463 | * Parse a for statement.
|
---|
| 2464 | *
|
---|
| 2465 | * @returns VBox status code.
|
---|
| 2466 | * @param pThis The script context.
|
---|
| 2467 | * @param pAstNodeFor Uninitialized for AST node.
|
---|
| 2468 | *
|
---|
| 2469 | * @note The caller skipped the "for" token already.
|
---|
| 2470 | */
|
---|
| 2471 | static int vdScriptParseFor(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTFOR pAstNodeFor)
|
---|
| 2472 | {
|
---|
| 2473 | int rc = VINF_SUCCESS;
|
---|
| 2474 |
|
---|
| 2475 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 2476 | {
|
---|
| 2477 | PVDSCRIPTASTEXPR pExprStart = NULL;
|
---|
| 2478 | PVDSCRIPTASTEXPR pExprCond = NULL;
|
---|
| 2479 | PVDSCRIPTASTEXPR pExpr3 = NULL;
|
---|
| 2480 |
|
---|
| 2481 | rc = vdScriptParseExpression(pThis, &pExprStart);
|
---|
| 2482 | if ( RT_SUCCESS(rc)
|
---|
| 2483 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ';'))
|
---|
| 2484 | {
|
---|
| 2485 | rc = vdScriptParseExpression(pThis, &pExprCond);
|
---|
| 2486 | if ( RT_SUCCESS(rc)
|
---|
| 2487 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ';'))
|
---|
| 2488 | {
|
---|
| 2489 | rc = vdScriptParseExpression(pThis, &pExpr3);
|
---|
| 2490 | if ( RT_SUCCESS(rc)
|
---|
| 2491 | && vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 2492 | {
|
---|
| 2493 | PVDSCRIPTASTSTMT pStmt = NULL;
|
---|
| 2494 | rc = vdScriptParseStatement(pThis, &pStmt);
|
---|
| 2495 | if (RT_SUCCESS(rc))
|
---|
| 2496 | {
|
---|
| 2497 | pAstNodeFor->pExprStart = pExprStart;
|
---|
| 2498 | pAstNodeFor->pExprCond = pExprCond;
|
---|
| 2499 | pAstNodeFor->pExpr3 = pExpr3;
|
---|
| 2500 | pAstNodeFor->pStmt = pStmt;
|
---|
| 2501 | }
|
---|
| 2502 | }
|
---|
| 2503 | }
|
---|
| 2504 | else if (RT_SUCCESS(rc))
|
---|
| 2505 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \";\", got ...\n");
|
---|
| 2506 | }
|
---|
| 2507 | else if (RT_SUCCESS(rc))
|
---|
| 2508 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \";\", got ...\n");
|
---|
| 2509 |
|
---|
| 2510 | if (RT_FAILURE(rc))
|
---|
| 2511 | {
|
---|
| 2512 | if (pExprStart)
|
---|
| 2513 | vdScriptAstNodeFree(&pExprStart->Core);
|
---|
| 2514 | if (pExprCond)
|
---|
| 2515 | vdScriptAstNodeFree(&pExprCond->Core);
|
---|
| 2516 | if (pExpr3)
|
---|
| 2517 | vdScriptAstNodeFree(&pExpr3->Core);
|
---|
| 2518 | }
|
---|
| 2519 | }
|
---|
| 2520 | else
|
---|
| 2521 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"(\", got ...\n");
|
---|
| 2522 |
|
---|
| 2523 | return rc;
|
---|
| 2524 | }
|
---|
| 2525 |
|
---|
| 2526 | /**
|
---|
| 2527 | * Parse a declaration.
|
---|
| 2528 | *
|
---|
| 2529 | * @returns VBox status code.
|
---|
| 2530 | * @param pThis The script context.
|
---|
| 2531 | * @param ppAstNodeDecl Where to store the declaration AST node on success.
|
---|
| 2532 | */
|
---|
| 2533 | static int vdScriptParseDeclaration(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTDECL *ppAstNodeDecl)
|
---|
| 2534 | {
|
---|
| 2535 | int rc = VERR_NOT_IMPLEMENTED;
|
---|
[62732] | 2536 | RT_NOREF2(pThis, ppAstNodeDecl);
|
---|
[44811] | 2537 | return rc;
|
---|
| 2538 | }
|
---|
| 2539 |
|
---|
| 2540 | /**
|
---|
| 2541 | * Parse a statement.
|
---|
| 2542 | *
|
---|
| 2543 | * @returns VBox status code.
|
---|
| 2544 | * @param pThis The script context.
|
---|
| 2545 | * @param ppAstNodeStmt Where to store the statement AST node on success.
|
---|
| 2546 | */
|
---|
| 2547 | static int vdScriptParseStatement(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTSTMT *ppAstNodeStmt)
|
---|
| 2548 | {
|
---|
| 2549 | int rc = VINF_SUCCESS;
|
---|
| 2550 |
|
---|
| 2551 | /* Shortcut for a new compound statement. */
|
---|
| 2552 | if (vdScriptTokenizerIsPunctuatorEqual(pThis->pTokenizer, '{'))
|
---|
| 2553 | rc = vdScriptParseCompoundStatement(pThis, ppAstNodeStmt);
|
---|
| 2554 | else
|
---|
| 2555 | {
|
---|
| 2556 | PVDSCRIPTASTSTMT pAstNodeStmt = (PVDSCRIPTASTSTMT)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_STATEMENT);
|
---|
| 2557 |
|
---|
| 2558 | if (pAstNodeStmt)
|
---|
| 2559 | {
|
---|
| 2560 |
|
---|
| 2561 | if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_DEFAULT))
|
---|
| 2562 | {
|
---|
| 2563 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ':'))
|
---|
| 2564 | {
|
---|
| 2565 | PVDSCRIPTASTSTMT pAstNodeStmtDef = NULL;
|
---|
| 2566 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_DEFAULT;
|
---|
| 2567 | rc = vdScriptParseStatement(pThis, &pAstNodeStmtDef);
|
---|
| 2568 | if (RT_SUCCESS(rc))
|
---|
| 2569 | pAstNodeStmt->pStmt = pAstNodeStmtDef;
|
---|
[44840] | 2570 | }
|
---|
[44811] | 2571 | else
|
---|
| 2572 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \":\", got ...\n");
|
---|
| 2573 | }
|
---|
| 2574 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_CASE))
|
---|
| 2575 | {
|
---|
| 2576 | PVDSCRIPTASTEXPR pAstNodeExpr = NULL;
|
---|
| 2577 | rc = vdScriptParseCondExpression(pThis, &pAstNodeExpr);
|
---|
| 2578 | if (RT_SUCCESS(rc))
|
---|
| 2579 | {
|
---|
| 2580 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ':'))
|
---|
| 2581 | {
|
---|
| 2582 | PVDSCRIPTASTSTMT pAstNodeCaseStmt = NULL;
|
---|
| 2583 | rc = vdScriptParseStatement(pThis, &pAstNodeCaseStmt);
|
---|
| 2584 | if (RT_SUCCESS(rc))
|
---|
| 2585 | {
|
---|
| 2586 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_CASE;
|
---|
| 2587 | pAstNodeStmt->Case.pExpr = pAstNodeExpr;
|
---|
| 2588 | pAstNodeStmt->Case.pStmt = pAstNodeCaseStmt;
|
---|
| 2589 | }
|
---|
| 2590 | }
|
---|
| 2591 | else
|
---|
| 2592 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \":\", got ...\n");
|
---|
| 2593 |
|
---|
| 2594 | if (RT_FAILURE(rc))
|
---|
| 2595 | vdScriptAstNodeFree(&pAstNodeExpr->Core);
|
---|
| 2596 | }
|
---|
| 2597 | }
|
---|
| 2598 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_IF))
|
---|
| 2599 | {
|
---|
| 2600 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_IF;
|
---|
| 2601 | rc = vdScriptParseIf(pThis, &pAstNodeStmt->If);
|
---|
| 2602 | }
|
---|
| 2603 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_SWITCH))
|
---|
| 2604 | {
|
---|
| 2605 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_SWITCH;
|
---|
| 2606 | rc = vdScriptParseSwitch(pThis, &pAstNodeStmt->Switch);
|
---|
| 2607 | }
|
---|
| 2608 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_WHILE))
|
---|
| 2609 | {
|
---|
| 2610 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_WHILE;
|
---|
| 2611 | rc = vdScriptParseWhile(pThis, &pAstNodeStmt->While, false /* fDoWhile */);
|
---|
| 2612 | }
|
---|
| 2613 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_DO))
|
---|
| 2614 | {
|
---|
| 2615 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_WHILE;
|
---|
| 2616 | rc = vdScriptParseWhile(pThis, &pAstNodeStmt->While, true /* fDoWhile */);
|
---|
| 2617 | }
|
---|
| 2618 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_FOR))
|
---|
| 2619 | {
|
---|
| 2620 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_FOR;
|
---|
| 2621 | rc = vdScriptParseFor(pThis, &pAstNodeStmt->For);
|
---|
| 2622 | }
|
---|
| 2623 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_CONTINUE))
|
---|
| 2624 | {
|
---|
| 2625 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_CONTINUE;
|
---|
| 2626 | if (!vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ';'))
|
---|
| 2627 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \";\", got ...\n");
|
---|
| 2628 | }
|
---|
| 2629 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_BREAK))
|
---|
| 2630 | {
|
---|
| 2631 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_BREAK;
|
---|
| 2632 | if (!vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ';'))
|
---|
| 2633 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \";\", got ...\n");
|
---|
| 2634 | }
|
---|
| 2635 | else if (vdScriptTokenizerSkipIfIsKeywordEqual(pThis->pTokenizer, VDSCRIPTTOKENKEYWORD_RETURN))
|
---|
| 2636 | {
|
---|
| 2637 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_RETURN;
|
---|
[44840] | 2638 | if (!vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ';'))
|
---|
| 2639 | {
|
---|
| 2640 | rc = vdScriptParseExpression(pThis, &pAstNodeStmt->pExpr);
|
---|
| 2641 | if ( RT_SUCCESS(rc)
|
---|
| 2642 | && !vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ';'))
|
---|
| 2643 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \";\", got ...\n");
|
---|
| 2644 | }
|
---|
[44855] | 2645 | else
|
---|
| 2646 | pAstNodeStmt->pExpr = NULL; /* No expression for return. */
|
---|
[44811] | 2647 | }
|
---|
| 2648 | else
|
---|
| 2649 | {
|
---|
| 2650 | /* Must be an expression. */
|
---|
| 2651 | pAstNodeStmt->enmStmtType = VDSCRIPTSTMTTYPE_EXPRESSION;
|
---|
| 2652 | rc = vdScriptParseExpression(pThis, &pAstNodeStmt->pExpr);
|
---|
| 2653 | if ( RT_SUCCESS(rc)
|
---|
| 2654 | && !vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ';'))
|
---|
| 2655 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \";\", got ...\n");
|
---|
| 2656 | }
|
---|
| 2657 |
|
---|
| 2658 | if (RT_SUCCESS(rc))
|
---|
| 2659 | *ppAstNodeStmt = pAstNodeStmt;
|
---|
| 2660 | else
|
---|
| 2661 | vdScriptAstNodeFree(&pAstNodeStmt->Core);
|
---|
| 2662 | }
|
---|
| 2663 | else
|
---|
| 2664 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory creating statement node\n");
|
---|
| 2665 | }
|
---|
| 2666 |
|
---|
| 2667 | return rc;
|
---|
| 2668 | }
|
---|
| 2669 |
|
---|
| 2670 | /**
|
---|
| 2671 | * Parses a compound statement.
|
---|
| 2672 | *
|
---|
| 2673 | * @returns VBox status code.
|
---|
| 2674 | * @param pThis The script context.
|
---|
| 2675 | * @param ppAstNodeCompound Where to store the compound AST node on success.
|
---|
| 2676 | */
|
---|
| 2677 | static int vdScriptParseCompoundStatement(PVDSCRIPTCTXINT pThis, PVDSCRIPTASTSTMT *ppAstNodeCompound)
|
---|
| 2678 | {
|
---|
| 2679 | int rc = VINF_SUCCESS;
|
---|
| 2680 |
|
---|
| 2681 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '{'))
|
---|
| 2682 | {
|
---|
| 2683 | PVDSCRIPTASTSTMT pAstNodeCompound = (PVDSCRIPTASTSTMT)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_STATEMENT);
|
---|
| 2684 | if (pAstNodeCompound)
|
---|
| 2685 | {
|
---|
| 2686 | pAstNodeCompound->enmStmtType = VDSCRIPTSTMTTYPE_COMPOUND;
|
---|
| 2687 | RTListInit(&pAstNodeCompound->Compound.ListDecls);
|
---|
| 2688 | RTListInit(&pAstNodeCompound->Compound.ListStmts);
|
---|
| 2689 | while (!vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '}'))
|
---|
| 2690 | {
|
---|
| 2691 | /*
|
---|
| 2692 | * Check whether we have a declaration or a statement.
|
---|
| 2693 | * For now we assume that 2 identifier tokens specify a declaration
|
---|
| 2694 | * (type + variable name). Having two consecutive identifers is not possible
|
---|
| 2695 | * for a statement.
|
---|
| 2696 | */
|
---|
| 2697 | if ( vdScriptTokenizerGetTokenClass(pThis->pTokenizer) == VDTOKENCLASS_IDENTIFIER
|
---|
| 2698 | && vdScriptTokenizerPeekNextClass(pThis->pTokenizer) == VDTOKENCLASS_IDENTIFIER)
|
---|
| 2699 | {
|
---|
| 2700 | PVDSCRIPTASTDECL pAstNodeDecl = NULL;
|
---|
| 2701 | rc = vdScriptParseDeclaration(pThis, &pAstNodeDecl);
|
---|
| 2702 | if (RT_SUCCESS(rc))
|
---|
| 2703 | RTListAppend(&pAstNodeCompound->Compound.ListDecls, &pAstNodeDecl->Core.ListNode);
|
---|
| 2704 | }
|
---|
| 2705 | else
|
---|
| 2706 | {
|
---|
| 2707 | PVDSCRIPTASTSTMT pAstNodeStmt = NULL;
|
---|
| 2708 | rc = vdScriptParseStatement(pThis, &pAstNodeStmt);
|
---|
| 2709 | if (RT_SUCCESS(rc))
|
---|
| 2710 | RTListAppend(&pAstNodeCompound->Compound.ListStmts, &pAstNodeStmt->Core.ListNode);
|
---|
| 2711 | }
|
---|
| 2712 |
|
---|
| 2713 | if (RT_FAILURE(rc))
|
---|
| 2714 | break;
|
---|
| 2715 | }
|
---|
| 2716 |
|
---|
| 2717 | if (RT_SUCCESS(rc))
|
---|
| 2718 | *ppAstNodeCompound = pAstNodeCompound;
|
---|
| 2719 | else
|
---|
| 2720 | vdScriptAstNodeFree(&pAstNodeCompound->Core);
|
---|
| 2721 | }
|
---|
| 2722 | else
|
---|
| 2723 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory creating compound statement node\n");
|
---|
| 2724 | }
|
---|
| 2725 | else
|
---|
| 2726 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"{\" got...\n");
|
---|
| 2727 |
|
---|
| 2728 |
|
---|
| 2729 | return rc;
|
---|
| 2730 | }
|
---|
| 2731 |
|
---|
| 2732 | /**
|
---|
| 2733 | * Parses a function definition from the given tokenizer.
|
---|
| 2734 | *
|
---|
| 2735 | * @returns VBox status code.
|
---|
| 2736 | * @param pThis The script context.
|
---|
| 2737 | */
|
---|
| 2738 | static int vdScriptParseAddFnDef(PVDSCRIPTCTXINT pThis)
|
---|
| 2739 | {
|
---|
| 2740 | int rc = VINF_SUCCESS;
|
---|
| 2741 | PVDSCRIPTASTIDE pRetType = NULL;
|
---|
| 2742 | PVDSCRIPTASTIDE pFnIde = NULL;
|
---|
| 2743 |
|
---|
| 2744 | LogFlowFunc(("pThis=%p\n", pThis));
|
---|
| 2745 |
|
---|
| 2746 | /* Put return type on the stack. */
|
---|
| 2747 | rc = vdScriptParseIde(pThis, &pRetType);
|
---|
| 2748 | if (RT_SUCCESS(rc))
|
---|
| 2749 | {
|
---|
| 2750 | /* Function name */
|
---|
| 2751 | rc = vdScriptParseIde(pThis, &pFnIde);
|
---|
| 2752 | if (RT_SUCCESS(rc))
|
---|
| 2753 | {
|
---|
| 2754 | if (vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, '('))
|
---|
| 2755 | {
|
---|
| 2756 | PVDSCRIPTASTFN pAstNodeFn = (PVDSCRIPTASTFN)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_FUNCTION);
|
---|
| 2757 |
|
---|
| 2758 | if (pAstNodeFn)
|
---|
| 2759 | {
|
---|
| 2760 | pAstNodeFn->pFnIde = pFnIde;
|
---|
| 2761 | pAstNodeFn->pRetType = pRetType;
|
---|
[44842] | 2762 | RTListInit(&pAstNodeFn->ListArgs);
|
---|
[44811] | 2763 |
|
---|
| 2764 | pFnIde = NULL;
|
---|
| 2765 | pRetType = NULL;
|
---|
| 2766 |
|
---|
| 2767 | /* Parse parameter list, create empty parameter list AST node and put it on the stack. */
|
---|
| 2768 | while (!vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 2769 | {
|
---|
| 2770 | PVDSCRIPTASTIDE pArgType = NULL;
|
---|
| 2771 | PVDSCRIPTASTIDE pArgIde = NULL;
|
---|
| 2772 | /* Parse two identifiers, first one is the type, second the name. */
|
---|
| 2773 | rc = vdScriptParseIde(pThis, &pArgType);
|
---|
| 2774 | if (RT_SUCCESS(rc))
|
---|
| 2775 | rc = vdScriptParseIde(pThis, &pArgIde);
|
---|
| 2776 |
|
---|
| 2777 | if (RT_SUCCESS(rc))
|
---|
| 2778 | {
|
---|
| 2779 | PVDSCRIPTASTFNARG pAstNodeFnArg = (PVDSCRIPTASTFNARG)vdScriptAstNodeAlloc(VDSCRIPTASTCLASS_FUNCTIONARG);
|
---|
| 2780 | if (pAstNodeFnArg)
|
---|
| 2781 | {
|
---|
| 2782 | pAstNodeFnArg->pArgIde = pArgIde;
|
---|
| 2783 | pAstNodeFnArg->pType = pArgType;
|
---|
| 2784 | RTListAppend(&pAstNodeFn->ListArgs, &pAstNodeFnArg->Core.ListNode);
|
---|
| 2785 | pAstNodeFn->cArgs++;
|
---|
| 2786 | }
|
---|
| 2787 | else
|
---|
| 2788 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating function argument AST node\n");
|
---|
| 2789 | }
|
---|
| 2790 |
|
---|
| 2791 | if (RT_FAILURE(rc))
|
---|
| 2792 | {
|
---|
| 2793 | if (pArgType)
|
---|
| 2794 | vdScriptAstNodeFree(&pArgType->Core);
|
---|
| 2795 | if (pArgIde)
|
---|
| 2796 | vdScriptAstNodeFree(&pArgIde->Core);
|
---|
| 2797 | }
|
---|
| 2798 |
|
---|
| 2799 | if ( !vdScriptTokenizerSkipIfIsPunctuatorEqual(pThis->pTokenizer, ',')
|
---|
| 2800 | && !vdScriptTokenizerIsPunctuatorEqual(pThis->pTokenizer, ')'))
|
---|
| 2801 | {
|
---|
| 2802 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \",\" or \")\" got...\n");
|
---|
| 2803 | break;
|
---|
| 2804 | }
|
---|
| 2805 | }
|
---|
| 2806 |
|
---|
| 2807 | /* Parse the compound or statement block now. */
|
---|
| 2808 | if (RT_SUCCESS(rc))
|
---|
| 2809 | {
|
---|
| 2810 | PVDSCRIPTASTSTMT pAstCompound = NULL;
|
---|
| 2811 |
|
---|
| 2812 | rc = vdScriptParseCompoundStatement(pThis, &pAstCompound);
|
---|
| 2813 | if (RT_SUCCESS(rc))
|
---|
| 2814 | {
|
---|
| 2815 | /*
|
---|
| 2816 | * Link compound statement block to function AST node and add it to the
|
---|
| 2817 | * list of functions.
|
---|
| 2818 | */
|
---|
| 2819 | pAstNodeFn->pCompoundStmts = pAstCompound;
|
---|
| 2820 | RTListAppend(&pThis->ListAst, &pAstNodeFn->Core.ListNode);
|
---|
[44941] | 2821 |
|
---|
| 2822 | PVDSCRIPTFN pFn = (PVDSCRIPTFN)RTMemAllocZ(sizeof(VDSCRIPTFN));
|
---|
| 2823 | if (pFn)
|
---|
| 2824 | {
|
---|
| 2825 | pFn->Core.pszString = pAstNodeFn->pFnIde->aszIde;
|
---|
| 2826 | pFn->Core.cchString = strlen(pFn->Core.pszString);
|
---|
| 2827 | pFn->fExternal = false;
|
---|
| 2828 | pFn->Type.Internal.pAstFn = pAstNodeFn;
|
---|
[63567] | 2829 | /** @todo Parameters. */
|
---|
[44941] | 2830 | RTStrSpaceInsert(&pThis->hStrSpaceFn, &pFn->Core);
|
---|
| 2831 | }
|
---|
| 2832 | else
|
---|
| 2833 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Out of memory allocating memory for function\n");
|
---|
[44811] | 2834 | }
|
---|
| 2835 | }
|
---|
| 2836 |
|
---|
| 2837 | if (RT_FAILURE(rc))
|
---|
| 2838 | vdScriptAstNodeFree(&pAstNodeFn->Core);
|
---|
| 2839 | }
|
---|
| 2840 | else
|
---|
| 2841 | rc = vdScriptParserError(pThis, VERR_NO_MEMORY, RT_SRC_POS, "Parser: Out of memory allocating function AST node\n");
|
---|
| 2842 | }
|
---|
| 2843 | else
|
---|
| 2844 | rc = vdScriptParserError(pThis, VERR_INVALID_PARAMETER, RT_SRC_POS, "Parser: Expected \"(\" got...\n");
|
---|
| 2845 | }
|
---|
| 2846 | }
|
---|
| 2847 |
|
---|
| 2848 | if (RT_FAILURE(rc))
|
---|
| 2849 | {
|
---|
| 2850 | if (pRetType)
|
---|
| 2851 | vdScriptAstNodeFree(&pRetType->Core);
|
---|
| 2852 | if (pFnIde)
|
---|
| 2853 | vdScriptAstNodeFree(&pFnIde->Core);
|
---|
| 2854 | }
|
---|
| 2855 |
|
---|
| 2856 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
| 2857 | return rc;
|
---|
| 2858 | }
|
---|
| 2859 |
|
---|
| 2860 | /**
|
---|
| 2861 | * Parses the script from the given tokenizer.
|
---|
| 2862 | *
|
---|
| 2863 | * @returns VBox status code.
|
---|
| 2864 | * @param pThis The script context.
|
---|
| 2865 | */
|
---|
| 2866 | static int vdScriptParseFromTokenizer(PVDSCRIPTCTXINT pThis)
|
---|
| 2867 | {
|
---|
| 2868 | int rc = VINF_SUCCESS;
|
---|
| 2869 |
|
---|
| 2870 | LogFlowFunc(("pThis=%p\n", pThis));
|
---|
| 2871 |
|
---|
| 2872 | /* This is a very very simple LL(1) parser, don't expect much from it for now :). */
|
---|
| 2873 | while ( RT_SUCCESS(rc)
|
---|
| 2874 | && !vdScriptTokenizerIsEos(pThis->pTokenizer))
|
---|
| 2875 | rc = vdScriptParseAddFnDef(pThis);
|
---|
| 2876 |
|
---|
| 2877 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
| 2878 | return rc;
|
---|
| 2879 | }
|
---|
| 2880 |
|
---|
| 2881 | DECLHIDDEN(int) VDScriptCtxCreate(PVDSCRIPTCTX phScriptCtx)
|
---|
| 2882 | {
|
---|
| 2883 | int rc = VINF_SUCCESS;
|
---|
| 2884 |
|
---|
| 2885 | LogFlowFunc(("phScriptCtx=%p\n", phScriptCtx));
|
---|
| 2886 |
|
---|
| 2887 | AssertPtrReturn(phScriptCtx, VERR_INVALID_POINTER);
|
---|
| 2888 |
|
---|
| 2889 | PVDSCRIPTCTXINT pThis = (PVDSCRIPTCTXINT)RTMemAllocZ(sizeof(VDSCRIPTCTXINT));
|
---|
| 2890 | if (pThis)
|
---|
| 2891 | {
|
---|
| 2892 | pThis->hStrSpaceFn = NULL;
|
---|
| 2893 | RTListInit(&pThis->ListAst);
|
---|
| 2894 | *phScriptCtx = pThis;
|
---|
| 2895 | }
|
---|
| 2896 | else
|
---|
| 2897 | rc = VINF_SUCCESS;
|
---|
| 2898 |
|
---|
| 2899 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
| 2900 | return rc;
|
---|
| 2901 | }
|
---|
| 2902 |
|
---|
[57415] | 2903 | static DECLCALLBACK(int) vdScriptCtxDestroyFnSpace(PRTSTRSPACECORE pStr, void *pvUser)
|
---|
[44811] | 2904 | {
|
---|
| 2905 | NOREF(pvUser);
|
---|
| 2906 |
|
---|
| 2907 | /*
|
---|
| 2908 | * Just free the whole structure, the AST for internal functions will be
|
---|
| 2909 | * destroyed later.
|
---|
| 2910 | */
|
---|
| 2911 | RTMemFree(pStr);
|
---|
| 2912 | return VINF_SUCCESS;
|
---|
| 2913 | }
|
---|
| 2914 |
|
---|
| 2915 | DECLHIDDEN(void) VDScriptCtxDestroy(VDSCRIPTCTX hScriptCtx)
|
---|
| 2916 | {
|
---|
| 2917 | PVDSCRIPTCTXINT pThis = hScriptCtx;
|
---|
| 2918 |
|
---|
| 2919 | AssertPtrReturnVoid(pThis);
|
---|
| 2920 |
|
---|
| 2921 | LogFlowFunc(("hScriptCtx=%p\n", pThis));
|
---|
| 2922 |
|
---|
| 2923 | RTStrSpaceDestroy(&pThis->hStrSpaceFn, vdScriptCtxDestroyFnSpace, NULL);
|
---|
| 2924 |
|
---|
[52371] | 2925 | /* Go through list of function ASTs and destroy them. */
|
---|
| 2926 | PVDSCRIPTASTCORE pIter;
|
---|
| 2927 | PVDSCRIPTASTCORE pIterNext;
|
---|
| 2928 | RTListForEachSafe(&pThis->ListAst, pIter, pIterNext, VDSCRIPTASTCORE, ListNode)
|
---|
| 2929 | {
|
---|
| 2930 | RTListNodeRemove(&pIter->ListNode);
|
---|
| 2931 | RTListInit(&pIter->ListNode);
|
---|
| 2932 | vdScriptAstNodeFree(pIter);
|
---|
| 2933 | }
|
---|
| 2934 |
|
---|
[44811] | 2935 | RTMemFree(pThis);
|
---|
| 2936 | }
|
---|
| 2937 |
|
---|
[44941] | 2938 | DECLHIDDEN(int) VDScriptCtxCallbacksRegister(VDSCRIPTCTX hScriptCtx, PCVDSCRIPTCALLBACK paCallbacks,
|
---|
[44811] | 2939 | unsigned cCallbacks, void *pvUser)
|
---|
| 2940 | {
|
---|
| 2941 | int rc = VINF_SUCCESS;
|
---|
| 2942 | PVDSCRIPTCTXINT pThis = hScriptCtx;
|
---|
| 2943 |
|
---|
| 2944 | LogFlowFunc(("hScriptCtx=%p paCallbacks=%p cCallbacks=%u pvUser=%p\n",
|
---|
| 2945 | pThis, paCallbacks, cCallbacks, pvUser));
|
---|
| 2946 |
|
---|
| 2947 | AssertPtrReturn(pThis, VERR_INVALID_POINTER);
|
---|
| 2948 | AssertPtrReturn(paCallbacks, VERR_INVALID_POINTER);
|
---|
| 2949 | AssertReturn(cCallbacks > 0, VERR_INVALID_PARAMETER);
|
---|
| 2950 |
|
---|
[63567] | 2951 | /** @todo Unregister already registered callbacks in case of an error. */
|
---|
[44811] | 2952 | do
|
---|
| 2953 | {
|
---|
| 2954 | PVDSCRIPTFN pFn = NULL;
|
---|
| 2955 |
|
---|
| 2956 | if (RTStrSpaceGet(&pThis->hStrSpaceFn, paCallbacks->pszFnName))
|
---|
| 2957 | {
|
---|
| 2958 | rc = VERR_DUPLICATE;
|
---|
| 2959 | break;
|
---|
| 2960 | }
|
---|
| 2961 |
|
---|
[73097] | 2962 | pFn = (PVDSCRIPTFN)RTMemAllocZ(RT_UOFFSETOF_DYN(VDSCRIPTFN, aenmArgTypes[paCallbacks->cArgs]));
|
---|
[44811] | 2963 | if (!pFn)
|
---|
| 2964 | {
|
---|
| 2965 | rc = VERR_NO_MEMORY;
|
---|
| 2966 | break;
|
---|
| 2967 | }
|
---|
| 2968 |
|
---|
[63567] | 2969 | /** @todo Validate argument and returns types. */
|
---|
[44811] | 2970 | pFn->Core.pszString = paCallbacks->pszFnName;
|
---|
| 2971 | pFn->Core.cchString = strlen(pFn->Core.pszString);
|
---|
| 2972 | pFn->fExternal = true;
|
---|
| 2973 | pFn->Type.External.pfnCallback = paCallbacks->pfnCallback;
|
---|
| 2974 | pFn->Type.External.pvUser = pvUser;
|
---|
| 2975 | pFn->enmTypeRetn = paCallbacks->enmTypeReturn;
|
---|
| 2976 | pFn->cArgs = paCallbacks->cArgs;
|
---|
| 2977 |
|
---|
| 2978 | for (unsigned i = 0; i < paCallbacks->cArgs; i++)
|
---|
[44901] | 2979 | pFn->aenmArgTypes[i] = paCallbacks->paArgs[i];
|
---|
[44811] | 2980 |
|
---|
| 2981 | RTStrSpaceInsert(&pThis->hStrSpaceFn, &pFn->Core);
|
---|
| 2982 | cCallbacks--;
|
---|
| 2983 | paCallbacks++;
|
---|
| 2984 | }
|
---|
| 2985 | while (cCallbacks);
|
---|
| 2986 |
|
---|
| 2987 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
| 2988 | return rc;
|
---|
| 2989 | }
|
---|
| 2990 |
|
---|
| 2991 | DECLHIDDEN(int) VDScriptCtxLoadScript(VDSCRIPTCTX hScriptCtx, const char *pszScript)
|
---|
| 2992 | {
|
---|
| 2993 | int rc = VINF_SUCCESS;
|
---|
| 2994 | PVDSCRIPTCTXINT pThis = hScriptCtx;
|
---|
| 2995 |
|
---|
| 2996 | LogFlowFunc(("hScriptCtx=%p pszScript=%p\n", pThis, pszScript));
|
---|
| 2997 |
|
---|
| 2998 | AssertPtrReturn(pThis, VERR_INVALID_POINTER);
|
---|
| 2999 | AssertPtrReturn(pszScript, VERR_INVALID_POINTER);
|
---|
| 3000 |
|
---|
| 3001 | PVDTOKENIZER pTokenizer = vdScriptTokenizerCreate(pszScript);
|
---|
| 3002 | if (pTokenizer)
|
---|
| 3003 | {
|
---|
| 3004 | pThis->pTokenizer = pTokenizer;
|
---|
| 3005 | rc = vdScriptParseFromTokenizer(pThis);
|
---|
| 3006 | pThis->pTokenizer = NULL;
|
---|
| 3007 | RTMemFree(pTokenizer);
|
---|
| 3008 | }
|
---|
| 3009 |
|
---|
| 3010 | LogFlowFunc(("returns rc=%Rrc\n", rc));
|
---|
| 3011 | return rc;
|
---|
| 3012 | }
|
---|
| 3013 |
|
---|
| 3014 | DECLHIDDEN(int) VDScriptCtxCallFn(VDSCRIPTCTX hScriptCtx, const char *pszFnCall,
|
---|
| 3015 | PVDSCRIPTARG paArgs, unsigned cArgs)
|
---|
| 3016 | {
|
---|
[44941] | 3017 | PVDSCRIPTCTXINT pThis = hScriptCtx;
|
---|
| 3018 | VDSCRIPTARG Ret;
|
---|
| 3019 | return vdScriptCtxInterprete(pThis, pszFnCall, paArgs, cArgs, &Ret);
|
---|
[44811] | 3020 | }
|
---|