// Copyright (C) 1992-1998 by Michael K. Johnson, johnsonm@redhat.com// Copyright 2002 Albert Cahalan//// This file is placed under the conditions of the GNU Library// General Public License, version 2, or any later version.// See file COPYING for information on distribution conditions.#include <stdlib.h>#include <stdio.h>#include "alloc.h"void *xcalloc(void *pointer, int size) {    void * ret;    if (pointer)        free(pointer);    if (!(ret = calloc(1, size))) {        fprintf(stderr, "xcalloc: allocation error, size = %d\n", size);        exit(1);    }    return ret;}void *xmalloc(unsigned int size) {    void *p;    if (size == 0)        ++size;    p = malloc(size);    if (!p) {	fprintf(stderr, "xmalloc: malloc(%d) failed", size);	perror(NULL);	exit(1);    }    return(p);}void *xrealloc(void *oldp, unsigned int size) {    void *p;    if (size == 0)        ++size;    p = realloc(oldp, size);    if (!p) {	fprintf(stderr, "xrealloc: realloc(%d) failed", size);	perror(NULL);	exit(1);    }    return(p);}