/* obstack.c - subroutines used implicitly by object stack macros
Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation,
+ Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
-#include "obstack.h"
+#ifdef _LIBC
+# include <obstack.h>
+# include <shlib-compat.h>
+#else
+# include "obstack.h"
+#endif
/* NOTE BEFORE MODIFYING THIS FILE: This version number must be
incremented whenever callers compiled using an old obstack.h can no
# endif
#endif
-#if defined _LIBC && defined USE_IN_LIBIO
-# include <wchar.h>
-#endif
+#include <stddef.h>
#ifndef ELIDE_CODE
+# if HAVE_INTTYPES_H
+# include <inttypes.h>
+# endif
+# if HAVE_STDINT_H || defined _LIBC
+# include <stdint.h>
+# endif
+
/* Determine default alignment. */
-struct fooalign {char x; double d;};
-# define DEFAULT_ALIGNMENT \
- ((PTR_INT_TYPE) ((char *) &((struct fooalign *) 0)->d - (char *) 0))
+union fooround
+{
+ uintmax_t i;
+ long double d;
+ void *p;
+};
+struct fooalign
+{
+ char c;
+ union fooround u;
+};
/* If malloc were really smart, it would round addresses to DEFAULT_ALIGNMENT.
But in fact it might be less smart and round addresses to as much as
DEFAULT_ROUNDING. So we prepare for it to do that. */
-union fooround {long x; double d;};
-# define DEFAULT_ROUNDING (sizeof (union fooround))
+enum
+ {
+ DEFAULT_ALIGNMENT = offsetof (struct fooalign, u),
+ DEFAULT_ROUNDING = sizeof (union fooround)
+ };
/* When we copy a long block of data, this is the unit to do it with.
On some machines, copying successive ints does not work;
/* Exit value used when `print_and_abort' is used. */
# include <stdlib.h>
-# ifndef EXIT_FAILURE
-# define EXIT_FAILURE 1
-# endif
+# ifdef _LIBC
int obstack_exit_failure = EXIT_FAILURE;
+# else
+# include "exitfail.h"
+# define obstack_exit_failure exit_failure
+# endif
-/* The non-GNU-C macros copy the obstack into this global variable
- to avoid multiple evaluation. */
-
-struct obstack *_obstack;
+# ifdef _LIBC
+# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_4)
+/* A looong time ago (before 1994, anyway; we're not sure) this global variable
+ was used by non-GNU-C macros to avoid multiple evaluation. The GNU C
+ library still exports it because somebody might use it. */
+struct obstack *_obstack_compat;
+compat_symbol (libc, _obstack_compat, _obstack, GLIBC_2_0);
+# endif
+# endif
/* Define a macro that either calls functions with the traditional malloc/free
calling interface, or calls functions with the mmalloc/mfree interface
register struct _obstack_chunk *chunk; /* points to new chunk */
if (alignment == 0)
- alignment = (int) DEFAULT_ALIGNMENT;
+ alignment = DEFAULT_ALIGNMENT;
if (size == 0)
/* Default size is what GNU malloc can fit in a 4096-byte block. */
{
chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size);
if (!chunk)
(*obstack_alloc_failed_handler) ();
- h->next_free = h->object_base = chunk->contents;
+ h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents,
+ alignment - 1);
h->chunk_limit = chunk->limit
= (char *) chunk + h->chunk_size;
chunk->prev = 0;
register struct _obstack_chunk *chunk; /* points to new chunk */
if (alignment == 0)
- alignment = (int) DEFAULT_ALIGNMENT;
+ alignment = DEFAULT_ALIGNMENT;
if (size == 0)
/* Default size is what GNU malloc can fit in a 4096-byte block. */
{
chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size);
if (!chunk)
(*obstack_alloc_failed_handler) ();
- h->next_free = h->object_base = chunk->contents;
+ h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents,
+ alignment - 1);
h->chunk_limit = chunk->limit
= (char *) chunk + h->chunk_size;
chunk->prev = 0;
/* Compute an aligned object_base in the new chunk */
object_base =
- __INT_TO_PTR ((__PTR_TO_INT (new_chunk->contents) + h->alignment_mask)
- & ~ (h->alignment_mask));
+ __PTR_ALIGN ((char *) new_chunk, new_chunk->contents, h->alignment_mask);
/* Move the existing object to the new chunk.
Word at a time is fast and is safe if the object
/* If the object just copied was the only data in OLD_CHUNK,
free that chunk and remove it from the chain.
But not if that chunk might contain an empty object. */
- if (h->object_base == old_chunk->contents && ! h->maybe_empty_object)
+ if (! h->maybe_empty_object
+ && (h->object_base
+ == __PTR_ALIGN ((char *) old_chunk, old_chunk->contents,
+ h->alignment_mask)))
{
new_chunk->prev = old_chunk->prev;
CALL_FREEFUN (h, old_chunk);
/* The new chunk certainly contains no empty object yet. */
h->maybe_empty_object = 0;
}
+# ifdef _LIBC
+libc_hidden_def (_obstack_newchunk)
+# endif
/* Return nonzero if object OBJ has been allocated from obstack H.
This is here for debugging.
# undef obstack_free
-/* This function has two names with identical definitions.
- This is the first one, called from non-ANSI code. */
-
-void
-_obstack_free (struct obstack *h, void *obj)
-{
- register struct _obstack_chunk *lp; /* below addr of any objects in this chunk */
- register struct _obstack_chunk *plp; /* point to previous chunk if any */
-
- lp = h->chunk;
- /* We use >= because there cannot be an object at the beginning of a chunk.
- But there can be an empty object at that address
- at the end of another chunk. */
- while (lp != 0 && ((void *) lp >= obj || (void *) (lp)->limit < obj))
- {
- plp = lp->prev;
- CALL_FREEFUN (h, lp);
- lp = plp;
- /* If we switch chunks, we can't tell whether the new current
- chunk contains an empty object, so assume that it may. */
- h->maybe_empty_object = 1;
- }
- if (lp)
- {
- h->object_base = h->next_free = (char *) (obj);
- h->chunk_limit = lp->limit;
- h->chunk = lp;
- }
- else if (obj != 0)
- /* obj is not in any of the chunks! */
- abort ();
-}
-
-/* This function is used from ANSI code. */
-
void
obstack_free (struct obstack *h, void *obj)
{
/* obj is not in any of the chunks! */
abort ();
}
+
+# ifdef _LIBC
+/* Older versions of libc used a function _obstack_free intended to be
+ called by non-GCC compilers. */
+strong_alias (obstack_free, _obstack_free)
+# endif
\f
int
_obstack_memory_used (struct obstack *h)
# else
# include "gettext.h"
# endif
-# define _(msgid) gettext (msgid)
+# ifndef _
+# define _(msgid) gettext (msgid)
+# endif
-# if defined _LIBC && defined USE_IN_LIBIO
+# ifdef _LIBC
# include <libio/iolibio.h>
-# define fputs(s, f) _IO_fputs (s, f)
# endif
# ifndef __attribute__
happen because the "memory exhausted" message appears in other places
like this and the translation should be reused instead of creating
a very similar string which requires a separate translation. */
-# if defined _LIBC && defined USE_IN_LIBIO
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s\n", _("memory exhausted"));
- else
+# ifdef _LIBC
+ (void) __fxprintf (NULL, "%s\n", _("memory exhausted"));
+# else
+ fprintf (stderr, "%s\n", _("memory exhausted"));
# endif
- fprintf (stderr, "%s\n", _("memory exhausted"));
exit (obstack_exit_failure);
}
projects / gnulib.git / blobdiff