130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/* xmalloc.c -- safe versions of malloc and realloc */
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/* Copyright (C) 1991 Free Software Foundation, Inc.
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This file is part of GNU Readline, a library for reading lines
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of text with interactive input and history editing.
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Readline is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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Readline is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Readline; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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#if defined (HAVE_CONFIG_H)
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#include <config.h>
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#endif
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#include "bashtypes.h"
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#include <stdio.h>
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#if defined (HAVE_STDLIB_H)
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# include <stdlib.h>
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#else
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# include "ansi_stdlib.h"
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#endif /* HAVE_STDLIB_H */
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#include "error.h"
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#if !defined (PTR_T)
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# if defined (__STDC__)
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# define PTR_T void *
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# else
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# define PTR_T char *
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# endif /* !__STDC__ */
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#endif /* !PTR_T */
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#if defined (HAVE_SBRK) && !defined (SBRK_DECLARED)
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extern char *sbrk();
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#endif
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static PTR_T lbreak;
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static int brkfound;
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static size_t allocated;
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/* **************************************************************** */
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/* */
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/* Memory Allocation and Deallocation. */
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/* */
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/* **************************************************************** */
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#if defined (HAVE_SBRK)
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static size_t
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findbrk ()
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{
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if (brkfound == 0)
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{
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lbreak = (PTR_T)sbrk (0);
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brkfound++;
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}
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return (char *)sbrk (0) - (char *)lbreak;
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}
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#endif
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/* Return a pointer to free()able block of memory large enough
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to hold BYTES number of bytes. If the memory cannot be allocated,
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print an error message and abort. */
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char *
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xmalloc (bytes)
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size_t bytes;
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{
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char *temp;
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temp = (char *)malloc (bytes);
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if (temp == 0)
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{
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#if defined (HAVE_SBRK)
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allocated = findbrk ();
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fatal_error ("xmalloc: cannot allocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
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#else
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fatal_error ("xmalloc: cannot allocate %lu bytes", (unsigned long)bytes);
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#endif /* !HAVE_SBRK */
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}
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return (temp);
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}
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char *
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xrealloc (pointer, bytes)
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PTR_T pointer;
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size_t bytes;
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{
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char *temp;
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temp = pointer ? (char *)realloc (pointer, bytes) : (char *)malloc (bytes);
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if (temp == 0)
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{
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#if defined (HAVE_SBRK)
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allocated = findbrk ();
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fatal_error ("xrealloc: cannot reallocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
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#else
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fatal_error ("xmalloc: cannot allocate %lu bytes", (unsigned long)bytes);
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#endif /* !HAVE_SBRK */
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}
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return (temp);
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}
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/* Use this as the function to call when adding unwind protects so we
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don't need to know what free() returns. */
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void
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xfree (string)
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PTR_T string;
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{
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if (string)
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free (string);
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}
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