Annotation of src/usr.bin/cvs/xmalloc.c, Revision 1.7
1.7 ! xsa 1: /* $OpenBSD: xmalloc.c,v 1.6 2006/03/28 02:13:44 ray Exp $ */
1.1 joris 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
1.6 ray 6: * Versions of malloc and friends that check their results, and never return
1.1 joris 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:
1.5 xsa 16: #include "includes.h"
1.1 joris 17:
1.3 xsa 18: #include "xmalloc.h"
19: #include "log.h"
1.1 joris 20:
21: void *
22: xmalloc(size_t size)
23: {
24: void *ptr;
25:
26: if (size == 0)
27: fatal("xmalloc: zero size");
28: ptr = malloc(size);
29: if (ptr == NULL)
1.6 ray 30: fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
1.1 joris 31: return ptr;
32: }
33:
34: void *
1.6 ray 35: xcalloc(size_t nmemb, size_t size)
36: {
37: void *ptr;
38:
39: if (size == 0 || nmemb == 0)
40: fatal("xcalloc: zero size");
41: if (SIZE_T_MAX / nmemb < size)
42: fatal("xcalloc: nmemb * size > SIZE_T_MAX");
43: ptr = calloc(nmemb, size);
44: if (ptr == NULL)
45: fatal("xcalloc: out of memory (allocating %lu bytes)",
46: (u_long)(size * nmemb));
47: return ptr;
48: }
49:
50: void *
51: xrealloc(void *ptr, size_t nmemb, size_t size)
1.1 joris 52: {
53: void *new_ptr;
1.6 ray 54: size_t new_size = nmemb * size;
1.1 joris 55:
56: if (new_size == 0)
57: fatal("xrealloc: zero size");
1.6 ray 58: if (SIZE_T_MAX / nmemb < size)
59: fatal("xrealloc: nmemb * size > SIZE_T_MAX");
1.1 joris 60: if (ptr == NULL)
1.6 ray 61: new_ptr = malloc(new_size);
1.1 joris 62: else
63: new_ptr = realloc(ptr, new_size);
64: if (new_ptr == NULL)
1.4 reyk 65: fatal("xrealloc: out of memory (new_size %lu bytes)",
66: (u_long) new_size);
1.1 joris 67: return new_ptr;
68: }
69:
70: void
71: xfree(void *ptr)
72: {
73: if (ptr == NULL)
74: fatal("xfree: NULL pointer given as argument");
75: free(ptr);
76: }
77:
78: char *
79: xstrdup(const char *str)
80: {
81: size_t len;
82: char *cp;
83:
84: len = strlen(str) + 1;
85: cp = xmalloc(len);
86: strlcpy(cp, str, len);
87: return cp;
1.6 ray 88: }
89:
90: int
91: xasprintf(char **ret, const char *fmt, ...)
92: {
93: va_list ap;
94: int i;
95:
96: va_start(ap, fmt);
97: i = vasprintf(ret, fmt, ap);
98: va_end(ap);
99:
100: if (i < 0 || *ret == NULL)
101: fatal("xasprintf: could not allocate memory");
1.7 ! xsa 102:
! 103: return (i);
! 104: }
! 105:
! 106: int
! 107: xsnprintf(char *str, size_t size, const char *fmt, ...)
! 108: {
! 109: va_list ap;
! 110: int i;
! 111:
! 112: va_start(ap, fmt);
! 113: i = vsnprintf(str, size, fmt, ap);
! 114: va_end(ap);
! 115:
! 116: if (i == -1 || i >= (int)size)
! 117: fatal("xsnprintf: overflow");
1.6 ray 118:
119: return (i);
1.1 joris 120: }