70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/* xmalloc.c -- malloc with out of memory checking
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Copyright (C) 1990, 1991 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#if STDC_HEADERS || THINK_C
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#include <stdlib.h>
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#else
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char *malloc ();
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char *realloc ();
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void free ();
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#endif
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#ifdef THINK_C
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#define error(x, y, z) perror(z) /* Throw out meaningless arguments */
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#else
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void error ();
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#endif
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/* Allocate N bytes of memory dynamically, with error checking. */
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char *
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xmalloc (n)
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unsigned n;
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{
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char *p;
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p = malloc (n);
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if (p == 0)
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/* Must exit with 2 for `cmp'. */
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error (2, 0, "virtual memory exhausted");
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return p;
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}
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/* Change the size of an allocated block of memory P to N bytes,
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with error checking.
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If P is NULL, run xmalloc.
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If N is 0, run free and return NULL. */
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char *
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xrealloc (p, n)
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char *p;
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unsigned n;
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{
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if (p == 0)
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return xmalloc (n);
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if (n == 0)
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{
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free (p);
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return 0;
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}
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p = realloc (p, n);
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if (p == 0)
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/* Must exit with 2 for `cmp'. */
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error (2, 0, "virtual memory exhausted");
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return p;
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}
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