| 1 | /* $NetBSD: nodes.c.pat,v 1.12 2004/06/15 22:57:27 dsl Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | *
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| 34 | * @(#)nodes.c.pat 8.2 (Berkeley) 5/4/95
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| 35 | */
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| 36 |
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| 37 | #include <stdlib.h>
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| 38 | /*
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| 39 | * Routine for dealing with parsed shell commands.
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| 40 | */
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| 41 |
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| 42 | #include "shell.h"
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| 43 | #include "nodes.h"
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| 44 | #include "memalloc.h"
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| 45 | #include "machdep.h"
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| 46 | #include "mystring.h"
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| 47 | #include "shinstance.h"
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| 48 |
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| 49 |
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| 50 | size_t funcblocksize; /* size of structures in function */
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| 51 | size_t funcstringsize; /* size of strings in node */
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| 52 | pointer funcblock; /* block to allocate function from */
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| 53 | char *funcstring; /* block to allocate strings from */
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| 54 |
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| 55 | %SIZES
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| 56 |
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| 57 |
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| 58 | STATIC void calcsize(union node *);
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| 59 | STATIC void sizenodelist(struct nodelist *);
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| 60 | STATIC union node *copynode(union node *);
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| 61 | STATIC struct nodelist *copynodelist(struct nodelist *);
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| 62 | STATIC char *nodesavestr(char *);
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| 63 |
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| 64 |
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| 65 |
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| 66 | /*
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| 67 | * Make a copy of a parse tree.
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| 68 | */
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| 69 |
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| 70 | union node *
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| 71 | copyfunc(psh, n)
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| 72 | struct shinstance *psh;
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| 73 | union node *n;
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| 74 | {
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| 75 | if (n == NULL)
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| 76 | return NULL;
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| 77 | funcblocksize = 0;
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| 78 | funcstringsize = 0;
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| 79 | calcsize(n);
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| 80 | funcblock = ckmalloc(psh, funcblocksize + funcstringsize);
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| 81 | funcstring = (char *) funcblock + funcblocksize;
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| 82 | return copynode(n);
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| 83 | }
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| 84 |
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| 85 |
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| 86 |
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| 87 | STATIC void
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| 88 | calcsize(n)
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| 89 | union node *n;
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| 90 | {
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| 91 | %CALCSIZE
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| 92 | }
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| 93 |
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| 94 |
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| 95 |
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| 96 | STATIC void
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| 97 | sizenodelist(lp)
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| 98 | struct nodelist *lp;
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| 99 | {
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| 100 | while (lp) {
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| 101 | funcblocksize += SHELL_ALIGN(sizeof(struct nodelist));
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| 102 | calcsize(lp->n);
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| 103 | lp = lp->next;
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| 104 | }
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| 105 | }
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| 106 |
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| 107 |
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| 108 |
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| 109 | STATIC union node *
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| 110 | copynode(n)
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| 111 | union node *n;
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| 112 | {
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| 113 | union node *new;
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| 114 |
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| 115 | %COPY
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| 116 | return new;
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| 117 | }
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| 118 |
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| 119 |
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| 120 | STATIC struct nodelist *
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| 121 | copynodelist(lp)
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| 122 | struct nodelist *lp;
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| 123 | {
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| 124 | struct nodelist *start;
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| 125 | struct nodelist **lpp;
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| 126 |
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| 127 | lpp = &start;
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| 128 | while (lp) {
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| 129 | *lpp = funcblock;
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| 130 | funcblock = (char *) funcblock +
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| 131 | SHELL_ALIGN(sizeof(struct nodelist));
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| 132 | (*lpp)->n = copynode(lp->n);
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| 133 | lp = lp->next;
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| 134 | lpp = &(*lpp)->next;
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| 135 | }
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| 136 | *lpp = NULL;
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| 137 | return start;
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| 138 | }
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| 139 |
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| 140 |
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| 141 |
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| 142 | STATIC char *
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| 143 | nodesavestr(s)
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| 144 | char *s;
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| 145 | {
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| 146 | register char *p = s;
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| 147 | register char *q = funcstring;
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| 148 | char *rtn = funcstring;
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| 149 |
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| 150 | while ((*q++ = *p++) != 0)
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| 151 | continue;
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| 152 | funcstring = q;
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| 153 | return rtn;
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| 154 | }
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| 155 |
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| 156 |
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| 157 |
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| 158 | /*
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| 159 | * Free a parse tree.
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| 160 | */
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| 161 |
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| 162 | void
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| 163 | freefunc(psh, n)
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| 164 | shinstance *psh;
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| 165 | union node *n;
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| 166 | {
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| 167 | if (n)
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| 168 | ckfree(psh, n);
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| 169 | }
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