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/*
* Grace - GRaphing, Advanced Computation and Exploration of data
*
* Home page: http://plasma-gate.weizmann.ac.il/Grace/
*
* Copyright (c) 1996-2002 Grace Development Team
*
* Maintained by Evgeny Stambulchik
*
*
* All Rights Reserved
*
* 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 of the License, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* memory stuff - malloc & friends
*/
#include <stdlib.h>
#include <string.h>
#include "grace/base.h"
/*
* free and check for NULL pointer
*/
void xfree(void *ptr)
{
if (ptr != NULL) {
free(ptr);
}
}
void *xmalloc(size_t size)
{
void *retval;
if (size == 0) {
retval = NULL;
} else {
retval = malloc(size);
}
if (retval == NULL && size != 0) {
errmsg("Memory storage exceeded!");
}
return retval;
}
void *xrealloc(void *ptr, size_t size)
{
void *retval;
#if defined(REALLOC_IS_BUGGY)
if (ptr == NULL) {
retval = malloc(size);
} else if (size == 0) {
if (ptr) {
free(ptr);
}
retval = NULL;
} else {
retval = realloc(ptr, size);
}
#else
retval = realloc(ptr, size);
#endif
if (retval == NULL && size != 0) {
errmsg("Memory storage exceeded!");
}
return retval;
}
void *xcalloc(size_t nmemb, size_t size)
{
void *retval;
retval = xmalloc(nmemb*size);
if (retval) {
memset(retval, 0, nmemb*size);
}
return retval;
}
char *copy_string(char *dest, const char *src)
{
if (src == dest) {
;
} else if (src == NULL) {
xfree(dest);
dest = NULL;
} else {
dest = xrealloc(dest, (strlen(src) + 1)*SIZEOF_CHAR);
strcpy(dest, src);
}
return(dest);
}
char *concat_strings(char *dest, const char *src)
{
if (src != NULL) {
if (dest == NULL) {
dest = copy_string(NULL, src);
} else {
dest = xrealloc(dest, (strlen(dest) + strlen(src) + 1)*SIZEOF_CHAR);
if (dest != NULL) {
strcat(dest, src);
}
}
}
return(dest);
}
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