/* (C) Copyright 1993,1994 by Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify, distribute, and sell this software * and its documentation for any purpose is hereby granted without * fee, provided that the above copyright notice appear in all copies * and that both that copyright notice and this permission notice * appear in supporting documentation, and that the name of Carnegie * Mellon University not be used in advertising or publicity * pertaining to distribution of the software without specific, * written prior permission.  Carnegie Mellon University makes no * representations about the suitability of this software for any * purpose.  It is provided "as is" without express or implied * warranty. * * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. */#include <stdio.h>#include <string.h>//extern char *malloc(), *realloc();char *xmalloc (int size){    char *ret;    if (ret = malloc((unsigned) size))      return ret;    fprintf(stderr, "Memory exhausted\n");    exit(1);}char *xrealloc (char *ptr, int size){    char *ret;    /* xrealloc (NULL, size) behaves like xmalloc (size), as in ANSI C */    if (ret = !ptr ? malloc ((unsigned) size) : realloc (ptr, (unsigned) size))      return ret;    fprintf(stderr, "Memory exhausted\n");    exit(1);}char *strsave(char *str){    char *p = xmalloc(strlen(str)+1);    strcpy(p, str);    return p;}