| /* xmalloc.c -- malloc with out of memory checking |
| Copyright (C) 1990, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| |
| #if STDC_HEADERS || THINK_C |
| #include <stdlib.h> |
| #else |
| char *malloc (); |
| char *realloc (); |
| void free (); |
| #endif |
| |
| #ifdef THINK_C |
| #define error(x, y, z) perror(z) /* Throw out meaningless arguments */ |
| #else |
| void error (); |
| #endif |
| |
| /* Allocate N bytes of memory dynamically, with error checking. */ |
| |
| char * |
| xmalloc (n) |
| unsigned n; |
| { |
| char *p; |
| |
| p = malloc (n); |
| if (p == 0) |
| /* Must exit with 2 for `cmp'. */ |
| error (2, 0, "virtual memory exhausted"); |
| return p; |
| } |
| |
| /* Change the size of an allocated block of memory P to N bytes, |
| with error checking. |
| If P is NULL, run xmalloc. |
| If N is 0, run free and return NULL. */ |
| |
| char * |
| xrealloc (p, n) |
| char *p; |
| unsigned n; |
| { |
| if (p == 0) |
| return xmalloc (n); |
| if (n == 0) |
| { |
| free (p); |
| return 0; |
| } |
| p = realloc (p, n); |
| if (p == 0) |
| /* Must exit with 2 for `cmp'. */ |
| error (2, 0, "virtual memory exhausted"); |
| return p; |
| } |