1 /* xmalloc.c -- safe versions of malloc and realloc */
3 /* Copyright (C) 1991 Free Software Foundation, Inc.
5 This file is part of GNU Readline, a library for reading lines
6 of text with interactive input and history editing.
8 Readline is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 Readline is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with Readline; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
22 #if defined (HAVE_CONFIG_H)
26 #include "bashtypes.h"
29 #if defined (HAVE_UNISTD_H)
33 #if defined (HAVE_STDLIB_H)
36 # include "ansi_stdlib.h"
37 #endif /* HAVE_STDLIB_H */
42 # if defined (__STDC__)
46 # endif /* !__STDC__ */
49 #if defined (HAVE_SBRK) && !defined (SBRK_DECLARED)
55 static size_t allocated;
57 /* **************************************************************** */
59 /* Memory Allocation and Deallocation. */
61 /* **************************************************************** */
63 #if defined (HAVE_SBRK)
69 lbreak = (PTR_T)sbrk (0);
72 return (char *)sbrk (0) - (char *)lbreak;
76 /* Return a pointer to free()able block of memory large enough
77 to hold BYTES number of bytes. If the memory cannot be allocated,
78 print an error message and abort. */
85 temp = (char *)malloc (bytes);
89 #if defined (HAVE_SBRK)
90 allocated = findbrk ();
91 fatal_error ("xmalloc: cannot allocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
93 fatal_error ("xmalloc: cannot allocate %lu bytes", (unsigned long)bytes);
94 #endif /* !HAVE_SBRK */
101 xrealloc (pointer, bytes)
107 temp = pointer ? (char *)realloc (pointer, bytes) : (char *)malloc (bytes);
111 #if defined (HAVE_SBRK)
112 allocated = findbrk ();
113 fatal_error ("xrealloc: cannot reallocate %lu bytes (%lu bytes allocated)", (unsigned long)bytes, (unsigned long)allocated);
115 fatal_error ("xmalloc: cannot allocate %lu bytes", (unsigned long)bytes);
116 #endif /* !HAVE_SBRK */
122 /* Use this as the function to call when adding unwind protects so we
123 don't need to know what free() returns. */