1 /* 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). 7 * 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". 13 */ 14 15 #include "includes.h" 16 RCSID("$OpenBSD: xmalloc.c,v 1.16 2001/07/23 18:21:46 stevesk Exp $"); 17 18 #pragma ident "%Z%%M% %I% %E% SMI" 19 20 #include "xmalloc.h" 21 #include "log.h" 22 23 void * 24 xmalloc(size_t size) 25 { 26 void *ptr; 27 28 if (size == 0) 29 fatal("xmalloc: zero size"); 30 ptr = malloc(size); 31 if (ptr == NULL) 32 fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size); 33 return ptr; 34 } 35 36 void * 37 xcalloc(size_t nmemb, size_t size) 38 { 39 void *ptr; 40 41 if (size == 0 || nmemb == 0) 42 fatal("xcalloc: zero size"); 43 if (SIZE_T_MAX / nmemb < size) 44 fatal("xcalloc: nmemb * size > SIZE_T_MAX"); 45 ptr = calloc(nmemb, size); 46 if (ptr == NULL) 47 fatal("xcalloc: out of memory (allocating %lu bytes)", 48 (u_long)(size * nmemb)); 49 return ptr; 50 } 51 52 void * 53 xrealloc(void *ptr, size_t new_size) 54 { 55 void *new_ptr; 56 57 if (new_size == 0) 58 fatal("xrealloc: zero size"); 59 if (ptr == NULL) 60 new_ptr = malloc(new_size); 61 else 62 new_ptr = realloc(ptr, new_size); 63 if (new_ptr == NULL) 64 fatal("xrealloc: out of memory (new_size %lu bytes)", (u_long) new_size); 65 return new_ptr; 66 } 67 68 void 69 xfree(void *ptr) 70 { 71 if (ptr == NULL) 72 fatal("xfree: NULL pointer given as argument"); 73 free(ptr); 74 } 75 76 char * 77 xstrdup(const char *str) 78 { 79 size_t len; 80 char *cp; 81 82 len = strlen(str) + 1; 83 cp = xmalloc(len); 84 strlcpy(cp, str, len); 85 return cp; 86 } 87