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synced 2024-09-15 04:08:07 -04:00
Add new utility functions, for memory management. These do The Right Thing and
never return NULL. git-svn-id: https://svn.xiph.org/trunk/ezstream@12524 0101bb08-14d6-0310-b084-bc0e0c8e3800
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src/util.c
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src/util.c
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/*
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* Copyright (c) 2007 Moritz Grimm <gtgbr@gmx.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "util.h"
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#ifndef SIZE_T_MAX
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# define SIZE_T_MAX UINT_MAX
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#endif
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extern int errno;
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extern char *__progname;
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void *
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xmalloc(size_t size)
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{
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void *ret;
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if (size == 0) {
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printf("%s: xmalloc(): Internal error: zero size\n",
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__progname);
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abort();
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}
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if ((ret = malloc(size)) == NULL) {
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printf("%s: xmalloc(): Allocating %lu bytes: %s\n",
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__progname, (unsigned long)(size), strerror(errno));
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exit(1);
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}
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return (ret);
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}
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void *
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xcalloc(size_t nmemb, size_t size)
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{
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void *ret;
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if (nmemb == 0 || size == 0) {
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printf("%s: xcalloc(): Internal error: zero size\n",
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__progname);
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abort();
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}
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if (SIZE_T_MAX / nmemb < size) {
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printf("%s: xcalloc(): Integer overflow, nmemb * size > SIZE_T_MAX\n",
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__progname);
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exit(1);
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}
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if ((ret = calloc(nmemb, size)) == NULL) {
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printf("%s: xcalloc(): Allocating %lu bytes: %s\n",
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__progname, (unsigned long)(nmemb * size), strerror(errno));
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exit(1);
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}
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return (ret);
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}
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void *
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xrealloc(void *ptr, size_t nmemb, size_t size)
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{
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void *ret;
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size_t nsiz = nmemb * size;
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if (nmemb == 0 || size == 0) {
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printf("%s: xrealloc(): Internal error: zero size\n",
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__progname);
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abort();
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}
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if (SIZE_T_MAX / nmemb < size) {
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printf("%s: xrealloc(): Integer overflow, nmemb * size > SIZE_T_MAX\n",
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__progname);
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exit(1);
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}
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if (ptr == NULL)
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ret = malloc(nsiz);
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else
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ret = realloc(ptr, nsiz);
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if (ret == NULL) {
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printf("%s: xrealloc(): (Re)allocating %lu bytes: %s\n",
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__progname, (unsigned long)(nmemb * size), strerror(errno));
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exit(1);
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}
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return (ret);
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}
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void
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xfree(void *ptr)
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{
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if (ptr == NULL) {
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printf("%s: xfree(): Internal error: NULL argument\n",
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__progname);
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abort();
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}
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free(ptr);
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ptr = NULL;
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}
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char *
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xstrdup(const char *str)
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{
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size_t len;
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char *nstr;
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len = strlen(str) + 1;
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nstr = xcalloc(1, len);
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memcpy(nstr, str, len);
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return (nstr);
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}
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26
src/util.h
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26
src/util.h
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@ -0,0 +1,26 @@
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/*
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* Copyright (c) 2007 Moritz Grimm <gtgbr@gmx.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __UTIL_H__
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#define __UTIL_H__
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void * xmalloc(size_t /* size */);
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void * xcalloc(size_t /* nmemb */, size_t /* size */);
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void * xrealloc(void *, size_t /* nmemb */, size_t /* size */);
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void xfree(void *);
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char * xstrdup(const char *);
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#endif /* __UTIL_H__ */
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