Annotation of src/usr.bin/diff/xmalloc.c, Revision 1.3
1.3 ! ray 1: /* $OpenBSD: xmalloc.c,v 1.2 2009/06/07 08:39:13 ray Exp $ */
1.1 ray 2: /*
3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Versions of malloc and friends that check their results, and never return
7: * failure (they call fatal if they encounter an error).
8: *
9: * As far as I am concerned, the code I have written for this software
10: * can be used freely for any purpose. Any derived versions of this
11: * software must be clearly marked as such, and if the derived work is
12: * incompatible with the protocol description in the RFC file, it must be
13: * called by a name other than "ssh" or "Secure Shell".
14: */
15:
16: #include <err.h>
17: #include <limits.h>
18: #include <stdarg.h>
19: #include <stdio.h>
20: #include <stdlib.h>
21: #include <string.h>
22:
23: #include "xmalloc.h"
24:
25: void *
26: xmalloc(size_t size)
27: {
28: void *ptr;
29:
30: if (size == 0)
31: errx(2, NULL);
32: ptr = malloc(size);
33: if (ptr == NULL)
34: errx(2, NULL);
35: return ptr;
36: }
37:
38: void *
1.2 ray 39: xcalloc(size_t nmemb, size_t size)
40: {
41: void *ptr;
42:
43: if (size == 0 || nmemb == 0)
1.3 ! ray 44: errx(2, "xcalloc: zero size");
1.2 ray 45: if (SIZE_MAX / nmemb < size)
1.3 ! ray 46: errx(2, "xcalloc: nmemb * size > SIZE_MAX");
1.2 ray 47: ptr = calloc(nmemb, size);
48: if (ptr == NULL)
1.3 ! ray 49: errx(2, "xcalloc: out of memory (allocating %lu bytes)",
1.2 ray 50: (u_long)(size * nmemb));
51: return ptr;
52: }
53:
54: void *
1.1 ray 55: xrealloc(void *ptr, size_t nmemb, size_t size)
56: {
57: void *new_ptr;
58: size_t new_size = nmemb * size;
59:
60: if (new_size == 0)
61: errx(2, NULL);
1.2 ray 62: if (SIZE_MAX / nmemb < size)
1.1 ray 63: errx(2, NULL);
64: if (ptr == NULL)
65: new_ptr = malloc(new_size);
66: else
67: new_ptr = realloc(ptr, new_size);
68: if (new_ptr == NULL)
69: errx(2, NULL);
70: return new_ptr;
71: }
72:
73: void
74: xfree(void *ptr)
75: {
76: if (ptr == NULL)
77: errx(2, NULL);
78: free(ptr);
79: }
80:
81: char *
82: xstrdup(const char *str)
83: {
84: size_t len;
85: char *cp;
86:
87: len = strlen(str) + 1;
88: cp = xmalloc(len);
89: strlcpy(cp, str, len);
90: return cp;
91: }
92:
93: int
94: xasprintf(char **ret, const char *fmt, ...)
95: {
96: va_list ap;
97: int i;
98:
99: va_start(ap, fmt);
100: i = vasprintf(ret, fmt, ap);
101: va_end(ap);
102:
103: if (i < 0 || *ret == NULL)
104: errx(2, NULL);
105:
106: return (i);
107: }