1 /* $OpenPackages$ */
2 /* $OpenBSD: varname.c,v 1.2 2004/04/07 13:11:36 espie Exp $ */
3 /*
4 * Copyright (c) 2001 Marc Espie.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
19 * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <stdlib.h>
29 #include "config.h"
30 #include "defines.h"
31 #include "var.h"
32 #include "buf.h"
33 #include "varname.h"
34
35 const char *
VarName_Get(const char * start,struct Name * name,SymTable * ctxt,bool err,const char * (* cont)(const char *))36 VarName_Get(const char *start, struct Name *name, SymTable *ctxt, bool err, const char *(*cont)(const char *))
37 {
38 const char *p;
39 size_t len;
40
41 p = cont(start);
42 /* If we don't want recursive variables, we skip over '$' */
43 if (!FEATURES(FEATURE_RECVARS)) {
44 while (*p == '$')
45 p = cont(p);
46 }
47 if (*p != '$') {
48 name->s = start;
49 name->e = p;
50 name->tofree = false;
51 return p;
52 } else {
53 BUFFER buf;
54 Buf_Init(&buf, MAKE_BSIZE);
55 for (;;) {
56 Buf_Addi(&buf, start, p);
57 if (*p != '$') {
58 name->s = (const char *)Buf_Retrieve(&buf);
59 name->e = name->s + Buf_Size(&buf);
60 name->tofree = true;
61 return p;
62 }
63 start = p;
64 Var_ParseBuffer(&buf, start, ctxt, err, &len);
65 start += len;
66 p = cont(start);
67 }
68 }
69 }
70
71 void
VarName_Free(struct Name * name)72 VarName_Free(struct Name *name)
73 {
74 if (name->tofree)
75 free((char *)name->s);
76 }
77
78