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