Annotation of src/usr.bin/make/memory.c, Revision 1.6
1.1 espie 1: /* $OpenPackages$ */
1.5 espie 2: /* $OpenBSD$ */
1.1 espie 3:
4: /*
5: * Copyright (c) 1988, 1989, 1990, 1993
6: * The Regents of the University of California. All rights reserved.
7: * Copyright (c) 1989 by Berkeley Softworks
8: * All rights reserved.
9: *
10: * This code is derived from software contributed to Berkeley by
11: * Adam de Boor.
12: *
13: * Redistribution and use in source and binary forms, with or without
14: * modification, are permitted provided that the following conditions
15: * are met:
16: * 1. Redistributions of source code must retain the above copyright
17: * notice, this list of conditions and the following disclaimer.
18: * 2. Redistributions in binary form must reproduce the above copyright
19: * notice, this list of conditions and the following disclaimer in the
20: * documentation and/or other materials provided with the distribution.
1.2 millert 21: * 3. Neither the name of the University nor the names of its contributors
1.1 espie 22: * may be used to endorse or promote products derived from this software
23: * without specific prior written permission.
24: *
25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35: * SUCH DAMAGE.
36: */
37:
38: #include <sys/types.h>
39: #include <sys/stat.h>
40: #include <errno.h>
41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <string.h>
44: #include <unistd.h>
1.4 espie 45: #include <stddef.h>
46: #include <stdint.h>
47: #include <ohash.h>
1.1 espie 48: #include "defines.h"
49: #include "memory.h"
50:
51: static void enomem(size_t);
1.5 espie 52: static void enocmem(size_t, size_t);
1.1 espie 53:
54: /*
55: * emalloc --
56: * malloc, but die on error.
57: */
58: void *
1.3 espie 59: emalloc(size_t size)
1.1 espie 60: {
61: void *p;
62:
1.3 espie 63: if ((p = malloc(size)) == NULL)
64: enomem(size);
1.1 espie 65: return p;
66: }
67:
68: /*
69: * estrdup --
70: * strdup, but die on error.
71: */
72: char *
1.3 espie 73: estrdup(const char *str)
1.1 espie 74: {
75: char *p;
76: size_t size;
77:
78: size = strlen(str) + 1;
79:
80: p = emalloc(size);
81: memcpy(p, str, size);
82: return p;
83: }
84:
85: /*
86: * erealloc --
87: * realloc, but die on error.
88: */
89: void *
1.3 espie 90: erealloc(void *ptr, size_t size)
1.1 espie 91: {
92: if ((ptr = realloc(ptr, size)) == NULL)
93: enomem(size);
94: return ptr;
95: }
96:
97: void *
1.3 espie 98: ecalloc(size_t s1, size_t s2)
1.1 espie 99: {
100: void *p;
101:
102: if ((p = calloc(s1, s2)) == NULL)
1.5 espie 103: enocmem(s1, s2);
1.1 espie 104: return p;
105: }
106:
1.5 espie 107: void *
1.6 ! espie 108: emult_realloc(void *ptr, size_t s1, size_t s2)
1.5 espie 109: {
1.6 ! espie 110: size_t size;
! 111:
! 112: if (s1 && SIZE_MAX / s1 < s2) {
! 113: errno = ENOMEM;
! 114: enocmem(s1, s2);
! 115: }
! 116: size = s1 * s2;
! 117: if ((ptr = realloc(ptr, size)) == NULL)
1.5 espie 118: enocmem(s1, s2);
119: return ptr;
120: }
121:
1.1 espie 122: /* Support routines for hash tables. */
123: void *
1.3 espie 124: hash_alloc(size_t s, void *u UNUSED)
1.1 espie 125: {
126: return ecalloc(s, 1);
127: }
128:
129: void
1.3 espie 130: hash_free(void *p, size_t s UNUSED, void *u UNUSED)
1.1 espie 131: {
132: free(p);
133: }
134:
135: void *
1.3 espie 136: element_alloc(size_t s, void *u UNUSED)
1.1 espie 137: {
138: return emalloc(s);
139: }
140:
141:
142:
143: /*
144: * enomem --
145: * die when out of memory.
146: */
147: void
1.3 espie 148: enomem(size_t size)
1.1 espie 149: {
1.5 espie 150: fprintf(stderr, "make: %s (%zu)\n", strerror(errno), size);
1.1 espie 151: exit(2);
152: }
153:
1.5 espie 154: void
155: enocmem(size_t sz1, size_t sz2)
156: {
157: fprintf(stderr, "make: %s (%zu * %zu)\n", strerror(errno), sz1, sz2);
158: exit(2);
159: }
1.1 espie 160: /*
161: * esetenv --
162: * change environment, die on error.
163: */
164: void
1.3 espie 165: esetenv(const char *name, const char *value)
1.1 espie 166: {
167: if (setenv(name, value, 1) == 0)
168: return;
169:
170: fprintf(stderr, "make: setenv failed (%s)\n", strerror(errno));
171: exit(2);
172: }
173:
174:
175: /*
176: * enunlink --
177: * Remove a file carefully, avoiding directories.
178: */
179: int
1.3 espie 180: eunlink(const char *file)
1.1 espie 181: {
182: struct stat st;
183:
184: if (lstat(file, &st) == -1)
185: return -1;
186:
187: if (S_ISDIR(st.st_mode)) {
188: errno = EISDIR;
189: return -1;
190: }
191: return unlink(file);
1.4 espie 192: }
193:
194: void
195: free_hash(struct ohash *h)
196: {
197: void *e;
198: unsigned int i;
199:
200: for (e = ohash_first(h, &i); e != NULL; e = ohash_next(h, &i))
201: free(e);
202: ohash_delete(h);
1.1 espie 203: }
204:
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