Annotation of src/usr.bin/ssh/xmalloc.c, Revision 1.32
1.32 ! deraadt 1: /* $OpenBSD: xmalloc.c,v 1.31 2015/02/06 23:21:59 millert 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:
1.22 stevesk 16: #include <stdarg.h>
1.31 millert 17: #include <stdint.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)
1.29 tedu 34: fatal("xmalloc: out of memory (allocating %zu bytes)", 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");
1.31 millert 45: if (SIZE_MAX / nmemb < size)
46: fatal("xcalloc: nmemb * size > SIZE_MAX");
1.18 djm 47: ptr = calloc(nmemb, size);
48: if (ptr == NULL)
1.29 tedu 49: fatal("xcalloc: out of memory (allocating %zu bytes)",
50: size * nmemb);
1.18 djm 51: return ptr;
52: }
53:
54: void *
1.32 ! deraadt 55: xreallocarray(void *ptr, size_t nmemb, size_t size)
1.1 deraadt 56: {
1.4 markus 57: void *new_ptr;
1.1 deraadt 58:
1.32 ! deraadt 59: new_ptr = reallocarray(ptr, nmemb, size);
1.4 markus 60: if (new_ptr == NULL)
1.32 ! deraadt 61: fatal("xreallocarray: out of memory (%zu elements of %zu bytes)",
! 62: nmemb, size);
1.4 markus 63: return new_ptr;
1.1 deraadt 64: }
65:
1.4 markus 66: char *
67: xstrdup(const char *str)
1.1 deraadt 68: {
1.16 stevesk 69: size_t len;
1.12 deraadt 70: char *cp;
1.2 deraadt 71:
1.16 stevesk 72: len = strlen(str) + 1;
1.12 deraadt 73: cp = xmalloc(len);
1.4 markus 74: strlcpy(cp, str, len);
75: return cp;
1.18 djm 76: }
77:
78: int
79: xasprintf(char **ret, const char *fmt, ...)
80: {
81: va_list ap;
82: int i;
83:
84: va_start(ap, fmt);
85: i = vasprintf(ret, fmt, ap);
86: va_end(ap);
87:
88: if (i < 0 || *ret == NULL)
89: fatal("xasprintf: could not allocate memory");
90:
91: return (i);
1.1 deraadt 92: }