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/*
* $Id$
*
* Common xmalloc memory allocation routines
*
* written by Jaakko Heinonen <jheinonen@users.sourceforge.net>
*/
/*
* Copyright (c) 2005 Jaakko Heinonen
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gettext.h"
#include "xmalloc.h"
static void
xmalloc_default_error_handler(int err)
{
fprintf(stderr, _("Memory allocation failure: %s\n"), strerror(err));
exit(EXIT_FAILURE);
}
static void (*xmalloc_handle_error)(int err) = xmalloc_default_error_handler;
void
xmalloc_set_error_handler(void (*func)(int err))
{
if(func)
xmalloc_handle_error = func;
else
xmalloc_handle_error = xmalloc_default_error_handler;
}
void *
xmalloc(size_t size)
{
void *p;
if((p = malloc(size)) == NULL)
(*xmalloc_handle_error)(errno);
return p;
}
void *
xmalloc0(size_t size)
{
void *p;
p = xmalloc(size);
if(p)
memset(p, 0, size);
return p;
}
static void *
_xmalloc_inc(size_t size, size_t inc, int zero)
{
size_t total_size = size + inc;
/*
* check if the calculation overflowed
*/
if(total_size < size) {
(*xmalloc_handle_error)(EINVAL);
return NULL;
}
return zero ? xmalloc0(total_size) : xmalloc(total_size);
}
void *
xmalloc_inc(size_t size, size_t inc)
{
return _xmalloc_inc(size, inc, 0);
}
void *
xmalloc0_inc(size_t size, size_t inc)
{
return _xmalloc_inc(size, inc, 1);
}
void *
xrealloc(void *ptr, size_t size)
{
if((ptr = realloc(ptr, size)) == NULL)
(*xmalloc_handle_error)(errno);
return ptr;
}
void *
xrealloc_inc(void *ptr, size_t size, size_t inc)
{
size_t total_size = size + inc;
/*
* check if the calculation overflowed
*/
if(total_size < size) {
(*xmalloc_handle_error)(EINVAL);
return NULL;
}
if((ptr = realloc(ptr, total_size)) == NULL)
(*xmalloc_handle_error)(errno);
return ptr;
}
char *
xstrdup(const char *s)
{
size_t len = strlen(s);
void *new;
new = xmalloc_inc(len, 1);
if(new == NULL)
return NULL;
return (char *)memcpy(new, s, len + 1);
}
char *
xstrndup(const char *s, size_t len)
{
char *new;
size_t n = strlen(s);
if(n > len)
n = len;
new = xmalloc_inc(n, 1);
if(new == NULL)
return NULL;
memcpy(new, s, n);
new[n] = '\0';
return new;
}
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