Annotation of src/usr.bin/ssh/xmalloc.c, Revision 1.18
1.1 deraadt 1: /*
1.5 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
5: * Versions of malloc and friends that check their results, and never return
6: * failure (they call fatal if they encounter an error).
1.11 stevesk 7: *
1.8 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.5 deraadt 13: */
1.1 deraadt 14:
15: #include "includes.h"
16:
1.9 markus 17: #include "xmalloc.h"
18: #include "log.h"
1.1 deraadt 19:
1.4 markus 20: void *
21: xmalloc(size_t size)
1.1 deraadt 22: {
1.12 deraadt 23: void *ptr;
24:
25: if (size == 0)
26: fatal("xmalloc: zero size");
27: ptr = malloc(size);
1.4 markus 28: if (ptr == NULL)
1.14 itojun 29: fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
1.4 markus 30: return ptr;
1.1 deraadt 31: }
32:
1.4 markus 33: void *
1.18 ! djm 34: xcalloc(size_t nmemb, size_t size)
! 35: {
! 36: void *ptr;
! 37:
! 38: if (nmemb && size && SIZE_T_MAX / nmemb < size)
! 39: fatal("xcalloc: nmemb * size > SIZE_T_MAX");
! 40: if (size == 0 || nmemb == 0)
! 41: fatal("xcalloc: zero size");
! 42: ptr = calloc(nmemb, size);
! 43: if (ptr == NULL)
! 44: fatal("xcalloc: out of memory (allocating %lu bytes)",
! 45: (u_long)(size * nmemb));
! 46: return ptr;
! 47: }
! 48:
! 49: void *
1.4 markus 50: xrealloc(void *ptr, size_t new_size)
1.1 deraadt 51: {
1.4 markus 52: void *new_ptr;
1.1 deraadt 53:
1.12 deraadt 54: if (new_size == 0)
1.13 markus 55: fatal("xrealloc: zero size");
1.4 markus 56: if (ptr == NULL)
1.15 deraadt 57: new_ptr = malloc(new_size);
58: else
59: new_ptr = realloc(ptr, new_size);
1.4 markus 60: if (new_ptr == NULL)
1.14 itojun 61: fatal("xrealloc: out of memory (new_size %lu bytes)", (u_long) new_size);
1.4 markus 62: return new_ptr;
1.1 deraadt 63: }
64:
1.6 markus 65: void
1.4 markus 66: xfree(void *ptr)
1.1 deraadt 67: {
1.4 markus 68: if (ptr == NULL)
69: fatal("xfree: NULL pointer given as argument");
70: free(ptr);
1.1 deraadt 71: }
72:
1.4 markus 73: char *
74: xstrdup(const char *str)
1.1 deraadt 75: {
1.16 stevesk 76: size_t len;
1.12 deraadt 77: char *cp;
1.2 deraadt 78:
1.16 stevesk 79: len = strlen(str) + 1;
1.12 deraadt 80: cp = xmalloc(len);
1.4 markus 81: strlcpy(cp, str, len);
82: return cp;
1.18 ! djm 83: }
! 84:
! 85: int
! 86: xasprintf(char **ret, const char *fmt, ...)
! 87: {
! 88: va_list ap;
! 89: int i;
! 90:
! 91: va_start(ap, fmt);
! 92: i = vasprintf(ret, fmt, ap);
! 93: va_end(ap);
! 94:
! 95: if (i < 0 || *ret == NULL)
! 96: fatal("xasprintf: could not allocate memory");
! 97:
! 98: return (i);
1.1 deraadt 99: }