/* xmalloc.c -- malloc with out of memory checking Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #if HAVE_CONFIG_H # include #endif #include #if STDC_HEADERS # include #endif #if ENABLE_NLS # include # define _(Text) gettext (Text) #else # define textdomain(Domain) # define _(Text) Text #endif /* If this file fails to compile because your machine has no memset() function, you should ensure that either HAVE_CALLOC or HAVE_BZERO are defined in config.h */ #if !HAVE_BZERO # define bzero(p, s) memset (s, 0, n) #endif #ifndef STDC_HEADERS void *calloc (); void *malloc (); void *realloc (); void free (); #endif /* Prototypes for functions defined here. */ static void *fixup_null_alloc (size_t n); /* Exit value when the requested amount of memory is not available. The caller may set it to some other value. */ int xmalloc_exit_failure = EXIT_FAILURE; /* Your program must provide these functions in order for xmalloc() to work. */ #if __STDC__ && (HAVE_VPRINTF || HAVE_DOPRNT) extern void error (int, int, const char *, ...); #else extern void error (); #endif static void * fixup_null_alloc (n) size_t n; { void *p; p = 0; if (n == 0) p = malloc ((size_t) 1); if (p == 0) error (xmalloc_exit_failure, 0, _("Memory exhausted")); return p; } /* Allocate N bytes of memory dynamically, with error checking. */ void * xmalloc (n) size_t n; { void *p; p = malloc (n); if (p == 0) p = fixup_null_alloc (n); return p; } /* Allocate memory for N elements of S bytes, with error checking. */ void * xcalloc (n, s) size_t n, s; { void *p; #if HAVE_CALLOC p = calloc (n, s); if (p == 0) p = fixup_null_alloc (n); #else p = xmalloc (n * s); bzero (p, n * s); #endif return p; } /* Change the size of an allocated block of memory P to N bytes, with error checking. If P is NULL, run xmalloc. */ void * xrealloc (p, n) void *p; size_t n; { if (p == 0) return xmalloc (n); p = realloc (p, n); if (p == 0) p = fixup_null_alloc (n); return p; } /* Don't free NULL pointers. */ void * xfree (stale) void *stale; { if (stale) free (stale); return 0; }