not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
+/*
+
+@deftypefn Replacement void* xmalloc (size_t)
+
+Allocate memory without fail. If @code{malloc} fails, this will print
+a message to @code{stderr} (using the name set by
+@code{xmalloc_set_program_name},
+if any) and then call @code{xexit}. Note that it is therefore safe for
+a program to contain @code{#define malloc xmalloc} in its source.
+
+@end deftypefn
+
+@deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size})
+Reallocate memory without fail. This routine functions like @code{realloc},
+but will behave the same as @code{xmalloc} if memory cannot be found.
+
+@end deftypefn
+
+@deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize})
+
+Allocate memory without fail, and set it to zero. This routine functions
+like @code{calloc}, but will behave the same as @code{xmalloc} if memory
+cannot be found.
+
+@end deftypefn
+
+@deftypefn Replacement void xmalloc_set_program_name (const char *@var{name})
+
+You can use this to set the name of the program used by
+@code{xmalloc_failed} when printing a failure message.
+
+@end deftypefn
+
+@deftypefn Replacement void xmalloc_failed (size_t)
+
+This function is not meant to be called by client code, and is listed
+here for completeness only. If any of the allocation routines fail, this
+function will be called to print an error message and terminate execution.
+
+@end deftypefn
+
+*/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
-#ifdef __STDC__
+#ifdef ANSI_PROTOTYPES
#include <stddef.h>
#else
#define size_t unsigned long
#endif /* HAVE_SBRK */
}
+void
+xmalloc_failed (size)
+ size_t size;
+{
+#ifdef HAVE_SBRK
+ extern char **environ;
+ size_t allocated;
+
+ if (first_break != NULL)
+ allocated = (char *) sbrk (0) - first_break;
+ else
+ allocated = (char *) sbrk (0) - (char *) &environ;
+ fprintf (stderr,
+ "\n%s%sout of memory allocating %lu bytes after a total of %lu bytes\n",
+ name, *name ? ": " : "",
+ (unsigned long) size, (unsigned long) allocated);
+#else /* HAVE_SBRK */
+ fprintf (stderr,
+ "\n%s%sout of memory allocating %lu bytes\n",
+ name, *name ? ": " : "",
+ (unsigned long) size);
+#endif /* HAVE_SBRK */
+ xexit (1);
+}
+
PTR
xmalloc (size)
size_t size;
size = 1;
newmem = malloc (size);
if (!newmem)
- {
-#ifdef HAVE_SBRK
- extern char **environ;
- size_t allocated;
-
- if (first_break != NULL)
- allocated = (char *) sbrk (0) - first_break;
- else
- allocated = (char *) sbrk (0) - (char *) &environ;
- fprintf (stderr,
- "\n%s%sCannot allocate %lu bytes after allocating %lu bytes\n",
- name, *name ? ": " : "",
- (unsigned long) size, (unsigned long) allocated);
-#else /* HAVE_SBRK */
- fprintf (stderr,
- "\n%s%sCannot allocate %lu bytes\n",
- name, *name ? ": " : "",
- (unsigned long) size);
-#endif /* HAVE_SBRK */
- xexit (1);
- }
+ xmalloc_failed (size);
+
return (newmem);
}
newmem = calloc (nelem, elsize);
if (!newmem)
- {
-#ifdef HAVE_SBRK
- extern char **environ;
- size_t allocated;
-
- if (first_break != NULL)
- allocated = (char *) sbrk (0) - first_break;
- else
- allocated = (char *) sbrk (0) - (char *) &environ;
- fprintf (stderr,
- "\n%s%sCannot allocate %lu bytes after allocating %lu bytes\n",
- name, *name ? ": " : "",
- (unsigned long) (nelem * elsize), (unsigned long) allocated);
-#else /* HAVE_SBRK */
- fprintf (stderr,
- "\n%s%sCannot allocate %lu bytes\n",
- name, *name ? ": " : "",
- (unsigned long) (nelem * elsize));
-#endif /* HAVE_SBRK */
- xexit (1);
- }
+ xmalloc_failed (nelem * elsize);
+
return (newmem);
}
else
newmem = realloc (oldmem, size);
if (!newmem)
- {
-#ifdef HAVE_SBRK
- extern char **environ;
- size_t allocated;
-
- if (first_break != NULL)
- allocated = (char *) sbrk (0) - first_break;
- else
- allocated = (char *) sbrk (0) - (char *) &environ;
- fprintf (stderr,
- "\n%s%sCannot reallocate %lu bytes after allocating %lu bytes\n",
- name, *name ? ": " : "",
- (unsigned long) size, (unsigned long) allocated);
-#else /* HAVE_SBRK */
- fprintf (stderr,
- "\n%s%sCannot reallocate %lu bytes\n",
- name, *name ? ": " : "",
- (unsigned long) size);
-#endif /* HAVE_SBRK */
- xexit (1);
- }
+ xmalloc_failed (size);
+
return (newmem);
}