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author | Jim Meyering <jim@meyering.net> | 1992-11-01 05:44:29 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 1992-11-01 05:44:29 +0000 |
commit | ccbd1d7dc5189f4637468a8136f672e60ee0e531 (patch) | |
tree | f07938daa9443c4a699efa77d88eb9eb2c2e663b /lib/xmalloc.c | |
parent | 144b82c6c22abaa2a3247dc33b286662a7aa90d9 (diff) | |
download | coreutils-ccbd1d7dc5189f4637468a8136f672e60ee0e531.tar.xz |
Initial revision
Diffstat (limited to 'lib/xmalloc.c')
-rw-r--r-- | lib/xmalloc.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/lib/xmalloc.c b/lib/xmalloc.c new file mode 100644 index 000000000..f989004be --- /dev/null +++ b/lib/xmalloc.c @@ -0,0 +1,65 @@ +/* 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. */ + +#ifdef STDC_HEADERS +#include <stdlib.h> +#else +char *malloc (); +char *realloc (); +void free (); +#endif + +void error (); + +/* 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; +} |