Annotation of src/usr.bin/ssh/xmalloc.c, Revision 1.27
1.27 ! deraadt 1: /* $OpenBSD: xmalloc.c,v 1.26 2006/08/01 23:22:48 stevesk Exp $ */
1.1 deraadt 2: /*
1.5 deraadt 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).
1.11 stevesk 8: *
1.8 deraadt 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".
1.5 deraadt 14: */
1.1 deraadt 15:
1.24 stevesk 16: #include <sys/param.h>
1.22 stevesk 17: #include <stdarg.h>
1.26 stevesk 18: #include <stdio.h>
1.25 stevesk 19: #include <stdlib.h>
1.23 stevesk 20: #include <string.h>
1.1 deraadt 21:
1.9 markus 22: #include "xmalloc.h"
23: #include "log.h"
1.1 deraadt 24:
1.4 markus 25: void *
26: xmalloc(size_t size)
1.1 deraadt 27: {
1.12 deraadt 28: void *ptr;
29:
30: if (size == 0)
31: fatal("xmalloc: zero size");
32: ptr = malloc(size);
1.4 markus 33: if (ptr == NULL)
1.14 itojun 34: fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
1.4 markus 35: return ptr;
1.1 deraadt 36: }
37:
1.4 markus 38: void *
1.18 djm 39: xcalloc(size_t nmemb, size_t size)
40: {
41: void *ptr;
42:
43: if (size == 0 || nmemb == 0)
44: fatal("xcalloc: zero size");
1.21 deraadt 45: if (SIZE_T_MAX / nmemb < size)
46: fatal("xcalloc: nmemb * size > SIZE_T_MAX");
1.18 djm 47: ptr = calloc(nmemb, size);
48: if (ptr == NULL)
49: fatal("xcalloc: out of memory (allocating %lu bytes)",
50: (u_long)(size * nmemb));
51: return ptr;
52: }
53:
54: void *
1.19 djm 55: xrealloc(void *ptr, size_t nmemb, size_t size)
1.1 deraadt 56: {
1.4 markus 57: void *new_ptr;
1.19 djm 58: size_t new_size = nmemb * size;
1.1 deraadt 59:
1.12 deraadt 60: if (new_size == 0)
1.13 markus 61: fatal("xrealloc: zero size");
1.21 deraadt 62: if (SIZE_T_MAX / nmemb < size)
63: fatal("xrealloc: nmemb * size > SIZE_T_MAX");
1.4 markus 64: if (ptr == NULL)
1.15 deraadt 65: new_ptr = malloc(new_size);
66: else
67: new_ptr = realloc(ptr, new_size);
1.4 markus 68: if (new_ptr == NULL)
1.19 djm 69: fatal("xrealloc: out of memory (new_size %lu bytes)",
70: (u_long) new_size);
1.4 markus 71: return new_ptr;
1.1 deraadt 72: }
73:
1.6 markus 74: void
1.4 markus 75: xfree(void *ptr)
1.1 deraadt 76: {
1.4 markus 77: if (ptr == NULL)
78: fatal("xfree: NULL pointer given as argument");
79: free(ptr);
1.1 deraadt 80: }
81:
1.4 markus 82: char *
83: xstrdup(const char *str)
1.1 deraadt 84: {
1.16 stevesk 85: size_t len;
1.12 deraadt 86: char *cp;
1.2 deraadt 87:
1.16 stevesk 88: len = strlen(str) + 1;
1.12 deraadt 89: cp = xmalloc(len);
1.4 markus 90: strlcpy(cp, str, len);
91: return cp;
1.18 djm 92: }
93:
94: int
95: xasprintf(char **ret, const char *fmt, ...)
96: {
97: va_list ap;
98: int i;
99:
100: va_start(ap, fmt);
101: i = vasprintf(ret, fmt, ap);
102: va_end(ap);
103:
104: if (i < 0 || *ret == NULL)
105: fatal("xasprintf: could not allocate memory");
106:
107: return (i);
1.1 deraadt 108: }