1 /* $OpenBSD: xmalloc.c,v 1.1 2017年08月11日 14:21:24 mpi Exp $ */ 2 3 /* 4 * Author: Tatu Ylonen <ylo@cs.hut.fi> 5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 6 * All rights reserved 7 * Versions of malloc and friends that check their results, and never return 8 * failure (they call fatalx if they encounter an error). 9 * 10 * As far as I am concerned, the code I have written for this software 11 * can be used freely for any purpose. Any derived versions of this 12 * software must be clearly marked as such, and if the derived work is 13 * incompatible with the protocol description in the RFC file, it must be 14 * called by a name other than "ssh" or "Secure Shell". 15 */ 16 17#include <err.h> 18#include <limits.h> 19#include <stdarg.h> 20#include <stdint.h> 21#include <stdio.h> 22#include <stdlib.h> 23#include <string.h> 24 25#include "xmalloc.h" 26 27 void * 28 xmalloc(size_t size) 29{ 30 void *ptr; 31 32 if (size == 0) 33 errx(1, "xmalloc: zero size"); 34 ptr = malloc(size); 35 if (ptr == NULL) 36 err(1, "xmalloc: allocating %zu bytes", 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 ptr = calloc(nmemb, size); 48 if (ptr == NULL) 49 err(1, "xcalloc: allocating %zu * %zu bytes", 50 nmemb, size); 51 return ptr; 52} 53 54 void * 55 xrealloc(void *ptr, size_t size) 56{ 57 return xreallocarray(ptr, 1, size); 58} 59 60 void * 61 xreallocarray(void *ptr, size_t nmemb, size_t size) 62{ 63 void *new_ptr; 64 65 if (nmemb == 0 || size == 0) 66 errx(1, "xreallocarray: zero size"); 67 new_ptr = reallocarray(ptr, nmemb, size); 68 if (new_ptr == NULL) 69 err(1, "xreallocarray: allocating %zu * %zu bytes", 70 nmemb, size); 71 return new_ptr; 72} 73 74 char * 75 xstrdup(const char *str) 76{ 77 char *cp; 78 79 if ((cp = strdup(str)) == NULL) 80 err(1, "xstrdup"); 81 return cp; 82} 83