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/* xmalloc.c -- safe versions of malloc and realloc */
/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of GNU Readline, a library for reading lines
of text with interactive input and history editing.
Readline 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 1, or (at your option) any
later version.
Readline 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 Readline; see the file COPYING. If not, write to the Free
Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#if defined (HAVE_CONFIG_H)
#include <config.h>
#endif
#include <sys/types.h>
#include <stdio.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#if defined (HAVE_STDLIB_H)
# include <stdlib.h>
#else
# include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */
#include "error.h"
#if !defined (PTR_T)
# if defined (__STDC__)
# define PTR_T void *
# else
# define PTR_T char *
# endif /* !__STDC__ */
#endif /* !PTR_T */
#if !defined (SBRK_DECLARED)
extern char *sbrk();
#endif
static PTR_T lbreak;
static int brkfound;
static size_t allocated;
/* **************************************************************** */
/* */
/* Memory Allocation and Deallocation. */
/* */
/* **************************************************************** */
/* Return a pointer to free()able block of memory large enough
to hold BYTES number of bytes. If the memory cannot be allocated,
print an error message and abort. */
char *
xmalloc (bytes)
size_t bytes;
{
char *temp;
temp = (char *)malloc (bytes);
if (temp == 0)
{
if (brkfound == 0)
{
lbreak = (PTR_T)sbrk (0);
brkfound++;
}
allocated = (char *)sbrk (0) - (char *)lbreak;
fatal_error ("xmalloc: cannot allocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
}
return (temp);
}
char *
xrealloc (pointer, bytes)
PTR_T pointer;
size_t bytes;
{
char *temp;
temp = pointer ? (char *)realloc (pointer, bytes) : (char *)malloc (bytes);
if (temp == 0)
{
if (brkfound == 0)
{
lbreak = (PTR_T)sbrk (0);
brkfound++;
}
allocated = (char *)sbrk (0) - (char *)lbreak;
fatal_error ("xrealloc: cannot reallocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
}
return (temp);
}
/* Use this as the function to call when adding unwind protects so we
don't need to know what free() returns. */
void
xfree (string)
char *string;
{
if (string)
free (string);
}
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