diff options
Diffstat (limited to 'xmalloc.c')
| -rw-r--r-- | xmalloc.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/xmalloc.c b/xmalloc.c new file mode 100644 index 0000000..93d1928 --- /dev/null +++ b/xmalloc.c @@ -0,0 +1,193 @@ +/* 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 2, 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, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ + +#if defined (HAVE_CONFIG_H) +#include <config.h> +#endif + +#include "bashtypes.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" + +#include "bashintl.h" + +#if !defined (PTR_T) +# if defined (__STDC__) +# define PTR_T void * +# else +# define PTR_T char * +# endif /* !__STDC__ */ +#endif /* !PTR_T */ + +#if defined (HAVE_SBRK) && !HAVE_DECL_SBRK +extern char *sbrk(); +#endif + +static PTR_T lbreak; +static int brkfound; +static size_t allocated; + +/* **************************************************************** */ +/* */ +/* Memory Allocation and Deallocation. */ +/* */ +/* **************************************************************** */ + +#if defined (HAVE_SBRK) +static size_t +findbrk () +{ + if (brkfound == 0) + { + lbreak = (PTR_T)sbrk (0); + brkfound++; + } + return (char *)sbrk (0) - (char *)lbreak; +} +#endif + +/* 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. */ +PTR_T +xmalloc (bytes) + size_t bytes; +{ + PTR_T temp; + + temp = malloc (bytes); + + if (temp == 0) + { +#if defined (HAVE_SBRK) + allocated = findbrk (); + fatal_error (_("xmalloc: cannot allocate %lu bytes (%lu bytes allocated)"), (unsigned long)bytes, (unsigned long)allocated); +#else + fatal_error (_("xmalloc: cannot allocate %lu bytes"), (unsigned long)bytes); +#endif /* !HAVE_SBRK */ + } + + return (temp); +} + +PTR_T +xrealloc (pointer, bytes) + PTR_T pointer; + size_t bytes; +{ + PTR_T temp; + + temp = pointer ? realloc (pointer, bytes) : malloc (bytes); + + if (temp == 0) + { +#if defined (HAVE_SBRK) + allocated = findbrk (); + fatal_error (_("xrealloc: cannot reallocate %lu bytes (%lu bytes allocated)"), (unsigned long)bytes, (unsigned long)allocated); +#else + fatal_error (_("xrealloc: cannot allocate %lu bytes"), (unsigned long)bytes); +#endif /* !HAVE_SBRK */ + } + + 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) + PTR_T string; +{ + if (string) + free (string); +} + +#ifdef USING_BASH_MALLOC +#include <malloc/shmalloc.h> + +PTR_T +sh_xmalloc (bytes, file, line) + size_t bytes; + char *file; + int line; +{ + PTR_T temp; + + temp = sh_malloc (bytes, file, line); + + if (temp == 0) + { +#if defined (HAVE_SBRK) + allocated = findbrk (); + fatal_error (_("xmalloc: %s:%d: cannot allocate %lu bytes (%lu bytes allocated)"), file, line, (unsigned long)bytes, (unsigned long)allocated); +#else + fatal_error (_("xmalloc: %s:%d: cannot allocate %lu bytes"), file, line, (unsigned long)bytes); +#endif /* !HAVE_SBRK */ + } + + return (temp); +} + +PTR_T +sh_xrealloc (pointer, bytes, file, line) + PTR_T pointer; + size_t bytes; + char *file; + int line; +{ + PTR_T temp; + + temp = pointer ? sh_realloc (pointer, bytes, file, line) : sh_malloc (bytes, file, line); + + if (temp == 0) + { +#if defined (HAVE_SBRK) + allocated = findbrk (); + fatal_error (_("xrealloc: %s:%d: cannot reallocate %lu bytes (%lu bytes allocated)"), file, line, (unsigned long)bytes, (unsigned long)allocated); +#else + fatal_error (_("xrealloc: %s:%d: cannot allocate %lu bytes"), file, line, (unsigned long)bytes); +#endif /* !HAVE_SBRK */ + } + + return (temp); +} + +void +sh_xfree (string, file, line) + PTR_T string; + char *file; + int line; +{ + if (string) + sh_free (string, file, line); +} +#endif |