+/*
+
+@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