168 lines
3.4 KiB
C
168 lines
3.4 KiB
C
/* xmalloc.c -- malloc with out of memory checking
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Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc., Foundation,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
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#if HAVE_CONFIG_H
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# include "../config.h"
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#endif
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#include <sys/types.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <errno.h>
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#if STDC_HEADERS
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# include <stdlib.h>
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#else
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void *calloc ();
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void *malloc ();
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void *realloc ();
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void free ();
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#endif
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#include "dropin.h"
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#include "xalloc.h"
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#ifndef EXIT_FAILURE
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# define EXIT_FAILURE 1
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#endif
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/* Prototypes for functions defined here. */
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#if defined (__STDC__) && __STDC__
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void *xmalloc (size_t n);
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void *xcalloc (size_t n, size_t s);
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void *xrealloc (void *p, size_t n);
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#endif
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/* Exit value when the requested amount of memory is not available.
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The caller may set it to some other value. */
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int xalloc_exit_failure = EXIT_FAILURE;
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/* FIXME: describe */
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char *const xalloc_msg_memory_exhausted = "Memory exhausted";
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/* FIXME: describe */
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void (*xalloc_fail_func) (int) = NULL;
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static void
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xalloc_fail (int size)
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{
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if (xalloc_fail_func)
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(*xalloc_fail_func) (size);
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fprintf(stderr, "%s\n", xalloc_msg_memory_exhausted);
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exit(xalloc_exit_failure);
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}
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/* Allocate N bytes of memory dynamically, with error checking. */
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void *
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xmalloc (size_t n)
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{
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void *p;
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p = malloc (n);
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if (p == NULL)
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xalloc_fail ((int)n);
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return p;
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}
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/* Allocate N bytes of memory dynamically, and set it all to zero. */
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void *
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xmalloc_and_zero (size_t n)
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{
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void *p;
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p = malloc (n);
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if (p == NULL)
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xalloc_fail ((int)n);
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memset (p, '\0', n);
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return p;
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}
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/* Change the size of an allocated block of memory P to N bytes,
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with error checking.
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If P is NULL, run xmalloc. */
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void *
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xrealloc (void *p, size_t n)
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{
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p = realloc (p, n);
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if (p == NULL)
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xalloc_fail (n);
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return p;
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}
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/* Duplicate a string */
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char *xstrdup(const char *s)
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{
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char *p;
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if(!s)
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return NULL;
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p = strdup(s);
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if(!p)
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xalloc_fail ((int)strlen(s));
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return p;
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}
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#ifdef NOT_USED
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/* Allocate memory for N elements of S bytes, with error checking. */
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void *
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xcalloc (n, s)
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size_t n, s;
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{
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void *p;
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p = calloc (n, s);
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if (p == NULL)
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xalloc_fail ();
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return p;
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}
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#endif /* NOT_USED */
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int xasprintf(char **strp, const char *fmt, ...) {
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int result;
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va_list ap;
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va_start(ap, fmt);
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result = xvasprintf(strp, fmt, ap);
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va_end(ap);
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return result;
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}
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int xvasprintf(char **strp, const char *fmt, va_list ap) {
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#ifdef HAVE_MINGW
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char buf[1024];
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int result = vsnprintf(buf, sizeof buf, fmt, ap);
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if(result < 0)
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exit(xalloc_exit_failure);
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buf[sizeof buf - 1] = 0;
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*strp = xstrdup(buf);
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#else
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int result = vasprintf(strp, fmt, ap);
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if(result < 0) {
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fprintf(stderr, "vasprintf() failed: %s\n", strerror(errno));
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exit(xalloc_exit_failure);
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}
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#endif
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return result;
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}
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