1 /* $OpenBSD: xmalloc.c,v 1.1 2015/04/24 16:24:11 nicm Exp $ */ 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 6 * Versions of malloc and friends that check their results, and never return 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 16 #include <err.h> 17 #include <stdarg.h> 18 #include <stdint.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <string.h> 22 23 #include "xmalloc.h" 24 25 void * 26 xmalloc(size_t size) 27 { 28 void *ptr; 29 30 if (size == 0) 31 errx(1, "xmalloc: zero size"); 32 ptr = malloc(size); 33 if (ptr == NULL) 34 errx(1, 35 "xmalloc: out of memory (allocating %zu bytes)", 36 size); 37 return ptr; 38 } 39 40 void * 41 xcalloc(size_t nmemb, size_t size) 42 { 43 void *ptr; 44 45 if (size == 0 || nmemb == 0) 46 errx(1, "xcalloc: zero size"); 47 if (SIZE_MAX / nmemb < size) 48 errx(1, "xcalloc: nmemb * size > SIZE_MAX"); 49 ptr = calloc(nmemb, size); 50 if (ptr == NULL) 51 errx(1, "xcalloc: out of memory (allocating %zu bytes)", 52 (size * nmemb)); 53 return ptr; 54 } 55 56 void * 57 xreallocarray(void *ptr, size_t nmemb, size_t size) 58 { 59 void *new_ptr; 60 61 new_ptr = reallocarray(ptr, nmemb, size); 62 if (new_ptr == NULL) 63 errx(1, "xreallocarray: out of memory (new_size %zu bytes)", 64 nmemb * size); 65 return new_ptr; 66 } 67 68 void 69 xfree(void *ptr) 70 { 71 if (ptr == NULL) 72 errx(1, "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 if (strlcpy(cp, str, len) >= len) 85 errx(1, "xstrdup: string truncated"); 86 return cp; 87 } 88 89 int 90 xasprintf(char **ret, const char *fmt, ...) 91 { 92 va_list ap; 93 int i; 94 95 va_start(ap, fmt); 96 i = vasprintf(ret, fmt, ap); 97 va_end(ap); 98 99 if (i < 0 || *ret == NULL) 100 errx(1, "xasprintf: could not allocate memory"); 101 102 return (i); 103 } 104