- sync obstack.{c,h} with glibc (Peter S. Mazinger)

1 files changed, 113 insertions, 209 deletions

diff --git a/include/obstack.h b/include/obstack.h
index 244e580ad..65eb2baec 100644
--- a/include/obstack.h
+++ b/include/obstack.h
@@ -1,7 +1,7 @@
 /* obstack.h - object stack macros
-   Copyright (C) 1988,89,90,91,92,93,94,96,97,98,99 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.  Its master source is NOT part of
-   the C library, however.  The master source lives in /gd/gnu/lib.
+   Copyright (C) 1988-1994,1996-1999,2003,2004,2005
+	Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -15,8 +15,8 @@
 
    You should have received a copy of the GNU Lesser General Public
    License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 /* Summary:
 
@@ -110,45 +110,36 @@ Summary:
 extern "C" {
 #endif
 
-/* We use subtraction of (char *) 0 instead of casting to int
-   because on word-addressable machines a simple cast to int
-   may ignore the byte-within-word field of the pointer.  */
-
-#ifndef __PTR_TO_INT
-# define __PTR_TO_INT(P) ((P) - (char *) 0)
-#endif
-
-#ifndef __INT_TO_PTR
-# define __INT_TO_PTR(P) ((P) + (char *) 0)
-#endif
-
-/* We need the type of the resulting object.  If __PTRDIFF_TYPE__ is
+/* We need the type of a pointer subtraction.  If __PTRDIFF_TYPE__ is
    defined, as with GNU C, use that; that way we don't pollute the
-   namespace with <stddef.h>'s symbols.  Otherwise, if <stddef.h> is
-   available, include it and use ptrdiff_t.  In traditional C, long is
-   the best that we can do.  */
+   namespace with <stddef.h>'s symbols.  Otherwise, include <stddef.h>
+   and use ptrdiff_t.  */
 
 #ifdef __PTRDIFF_TYPE__
 # define PTR_INT_TYPE __PTRDIFF_TYPE__
 #else
-# ifdef HAVE_STDDEF_H
-#  include <stddef.h>
-#  define PTR_INT_TYPE ptrdiff_t
-# else
-#  define PTR_INT_TYPE long
-# endif
+# include <stddef.h>
+# define PTR_INT_TYPE ptrdiff_t
 #endif
 
-#if defined _LIBC || defined HAVE_STRING_H
-# include <string.h>
-# define _obstack_memcpy(To, From, N) memcpy ((To), (From), (N))
-#else
-# ifdef memcpy
-#  define _obstack_memcpy(To, From, N) memcpy ((To), (From), (N))
-# else
-#  define _obstack_memcpy(To, From, N) bcopy ((From), (To), (N))
-# endif
-#endif
+/* If B is the base of an object addressed by P, return the result of
+   aligning P to the next multiple of A + 1.  B and P must be of type
+   char *.  A + 1 must be a power of 2.  */
+
+#define __BPTR_ALIGN(B, P, A) ((B) + (((P) - (B) + (A)) & ~(A)))
+
+/* Similiar to _BPTR_ALIGN (B, P, A), except optimize the common case
+   where pointers can be converted to integers, aligned as integers,
+   and converted back again.  If PTR_INT_TYPE is narrower than a
+   pointer (e.g., the AS/400), play it safe and compute the alignment
+   relative to B.  Otherwise, use the faster strategy of computing the
+   alignment relative to 0.  */
+
+#define __PTR_ALIGN(B, P, A)						    \
+  __BPTR_ALIGN (sizeof (PTR_INT_TYPE) < sizeof (void *) ? (B) : (char *) 0, \
+		P, A)
+
+#include <string.h>
 
 struct _obstack_chunk		/* Lives at front of each chunk. */
 {
@@ -164,20 +155,18 @@ struct obstack		/* control current object in current chunk */
   char	*object_base;		/* address of object we are building */
   char	*next_free;		/* where to add next char to current object */
   char	*chunk_limit;		/* address of char after current chunk */
-  PTR_INT_TYPE temp;		/* Temporary for some macros.  */
+  union
+  {
+    PTR_INT_TYPE tempint;
+    void *tempptr;
+  } temp;			/* Temporary for some macros.  */
   int   alignment_mask;		/* Mask of alignment for each object. */
-#if defined __STDC__ && __STDC__
   /* These prototypes vary based on `use_extra_arg', and we use
      casts to the prototypeless function type in all assignments,
      but having prototypes here quiets -Wstrict-prototypes.  */
   struct _obstack_chunk *(*chunkfun) (void *, long);
   void (*freefun) (void *, struct _obstack_chunk *);
   void *extra_arg;		/* first arg for chunk alloc/dealloc funcs */
-#else
-  struct _obstack_chunk *(*chunkfun) (); /* User's fcn to allocate a chunk.  */
-  void (*freefun) ();		/* User's function to free a chunk.  */
-  char *extra_arg;		/* first arg for chunk alloc/dealloc funcs */
-#endif
   unsigned use_extra_arg:1;	/* chunk alloc/dealloc funcs take extra arg */
   unsigned maybe_empty_object:1;/* There is a possibility that the current
 				   chunk contains a zero-length object.  This
@@ -190,77 +179,22 @@ struct obstack		/* control current object in current chunk */
 
 /* Declare the external functions we use; they are in obstack.c.  */
 
-#if defined __STDC__ && __STDC__
 extern void _obstack_newchunk (struct obstack *, int);
-extern void _obstack_free (struct obstack *, void *);
 extern int _obstack_begin (struct obstack *, int, int,
 			    void *(*) (long), void (*) (void *));
 extern int _obstack_begin_1 (struct obstack *, int, int,
 			     void *(*) (void *, long),
 			     void (*) (void *, void *), void *);
 extern int _obstack_memory_used (struct obstack *);
-#else
-extern void _obstack_newchunk ();
-extern void _obstack_free ();
-extern int _obstack_begin ();
-extern int _obstack_begin_1 ();
-extern int _obstack_memory_used ();
-#endif
-
-#if defined __STDC__ && __STDC__
-
-/* Do the function-declarations after the structs
-   but before defining the macros.  */
-
-void obstack_init (struct obstack *obstack);
-
-void * obstack_alloc (struct obstack *obstack, int size);
-
-void * obstack_copy (struct obstack *obstack, const void *address, int size);
-void * obstack_copy0 (struct obstack *obstack, const void *address, int size);
 
 void obstack_free (struct obstack *obstack, void *block);
 
-void obstack_blank (struct obstack *obstack, int size);
-
-void obstack_grow (struct obstack *obstack, const void *data, int size);
-void obstack_grow0 (struct obstack *obstack, const void *data, int size);
-
-void obstack_1grow (struct obstack *obstack, int data_char);
-void obstack_ptr_grow (struct obstack *obstack, const void *data);
-void obstack_int_grow (struct obstack *obstack, int data);
-
-void * obstack_finish (struct obstack *obstack);
-
-int obstack_object_size (struct obstack *obstack);
-
-int obstack_room (struct obstack *obstack);
-void obstack_make_room (struct obstack *obstack, int size);
-void obstack_1grow_fast (struct obstack *obstack, int data_char);
-void obstack_ptr_grow_fast (struct obstack *obstack, const void *data);
-void obstack_int_grow_fast (struct obstack *obstack, int data);
-void obstack_blank_fast (struct obstack *obstack, int size);
-
-void * obstack_base (struct obstack *obstack);
-void * obstack_next_free (struct obstack *obstack);
-int obstack_alignment_mask (struct obstack *obstack);
-int obstack_chunk_size (struct obstack *obstack);
-int obstack_memory_used (struct obstack *obstack);
-
-#endif /* __STDC__ */
-
-/* Non-ANSI C cannot really support alternative functions for these macros,
-   so we do not declare them.  */
 
 /* Error handler called when `obstack_chunk_alloc' failed to allocate
    more memory.  This can be set to a user defined function which
    should either abort gracefully or use longjump - but shouldn't
    return.  The default action is to print a message and abort.  */
-#if defined __STDC__ && __STDC__
 extern void (*obstack_alloc_failed_handler) (void);
-#else
-extern void (*obstack_alloc_failed_handler) ();
-#endif
 
 /* Exit value used when `print_and_abort' is used.  */
 extern int obstack_exit_failure;
@@ -269,7 +203,7 @@ extern int obstack_exit_failure;
    Note that this might not be the final address of the object
    because a new chunk might be needed to hold the final size.  */
 
-#define obstack_base(h) ((h)->object_base)
+#define obstack_base(h) ((void *) (h)->object_base)
 
 /* Size for allocating ordinary chunks.  */
 
@@ -283,67 +217,34 @@ extern int obstack_exit_failure;
 
 #define obstack_alignment_mask(h) ((h)->alignment_mask)
 
-/* To prevent prototype warnings provide complete argument list in
-   standard C version.  */
-#if defined __STDC__ && __STDC__
-
-# define obstack_init(h)					\
+/* To prevent prototype warnings provide complete argument list.  */
+#define obstack_init(h)						\
   _obstack_begin ((h), 0, 0,					\
-		  (void *(*) (long)) obstack_chunk_alloc, 	\
+		  (void *(*) (long)) obstack_chunk_alloc,	\
 		  (void (*) (void *)) obstack_chunk_free)
 
-# define obstack_begin(h, size)					\
+#define obstack_begin(h, size)					\
   _obstack_begin ((h), (size), 0,				\
-		  (void *(*) (long)) obstack_chunk_alloc, 	\
+		  (void *(*) (long)) obstack_chunk_alloc,	\
 		  (void (*) (void *)) obstack_chunk_free)
 
-# define obstack_specify_allocation(h, size, alignment, chunkfun, freefun) \
+#define obstack_specify_allocation(h, size, alignment, chunkfun, freefun)  \
   _obstack_begin ((h), (size), (alignment),				   \
-		  (void *(*) (long)) (chunkfun), 			   \
+		  (void *(*) (long)) (chunkfun),			   \
 		  (void (*) (void *)) (freefun))
 
-# define obstack_specify_allocation_with_arg(h, size, alignment, chunkfun, freefun, arg) \
+#define obstack_specify_allocation_with_arg(h, size, alignment, chunkfun, freefun, arg) \
   _obstack_begin_1 ((h), (size), (alignment),				\
 		    (void *(*) (void *, long)) (chunkfun),		\
 		    (void (*) (void *, void *)) (freefun), (arg))
 
-# define obstack_chunkfun(h, newchunkfun) \
+#define obstack_chunkfun(h, newchunkfun) \
   ((h) -> chunkfun = (struct _obstack_chunk *(*)(void *, long)) (newchunkfun))
 
-# define obstack_freefun(h, newfreefun) \
+#define obstack_freefun(h, newfreefun) \
   ((h) -> freefun = (void (*)(void *, struct _obstack_chunk *)) (newfreefun))
 
-#else
-
-# define obstack_init(h)						\
-  _obstack_begin ((h), 0, 0,						\
-		  (void *(*) ()) obstack_chunk_alloc, 			\
-		  (void (*) ()) obstack_chunk_free)
-
-# define obstack_begin(h, size)						\
-  _obstack_begin ((h), (size), 0,					\
-		  (void *(*) ()) obstack_chunk_alloc,			\
-		  (void (*) ()) obstack_chunk_free)
-
-# define obstack_specify_allocation(h, size, alignment, chunkfun, freefun) \
-  _obstack_begin ((h), (size), (alignment),				   \
-		  (void *(*) ()) (chunkfun), 				   \
-		  (void (*) ()) (freefun))
-
-# define obstack_specify_allocation_with_arg(h, size, alignment, chunkfun, freefun, arg) \
-  _obstack_begin_1 ((h), (size), (alignment),				\
-		    (void *(*) ()) (chunkfun), 				\
-		    (void (*) ()) (freefun), (arg))
-
-# define obstack_chunkfun(h, newchunkfun) \
-  ((h) -> chunkfun = (struct _obstack_chunk *(*)()) (newchunkfun))
-
-# define obstack_freefun(h, newfreefun) \
-  ((h) -> freefun = (void (*)()) (newfreefun))
-
-#endif
-
-#define obstack_1grow_fast(h,achar) (*((h)->next_free)++ = achar)
+#define obstack_1grow_fast(h,achar) (*((h)->next_free)++ = (achar))
 
 #define obstack_blank_fast(h,n) ((h)->next_free += (n))
 
@@ -364,12 +265,12 @@ extern int obstack_exit_failure;
 
 # define obstack_object_size(OBSTACK)					\
   __extension__								\
-  ({ struct obstack *__o = (OBSTACK);					\
+  ({ struct obstack const *__o = (OBSTACK);				\
      (unsigned) (__o->next_free - __o->object_base); })
 
 # define obstack_room(OBSTACK)						\
   __extension__								\
-  ({ struct obstack *__o = (OBSTACK);					\
+  ({ struct obstack const *__o = (OBSTACK);				\
      (unsigned) (__o->chunk_limit - __o->next_free); })
 
 # define obstack_make_room(OBSTACK,length)				\
@@ -382,8 +283,11 @@ __extension__								\
 
 # define obstack_empty_p(OBSTACK)					\
   __extension__								\
-  ({ struct obstack *__o = (OBSTACK);					\
-     (__o->chunk->prev == 0 && __o->next_free - __o->chunk->contents == 0); })
+  ({ struct obstack const *__o = (OBSTACK);				\
+     (__o->chunk->prev == 0						\
+      && __o->next_free == __PTR_ALIGN ((char *) __o->chunk,		\
+					__o->chunk->contents,		\
+					__o->alignment_mask)); })
 
 # define obstack_grow(OBSTACK,where,length)				\
 __extension__								\
@@ -391,7 +295,7 @@ __extension__								\
    int __len = (length);						\
    if (__o->next_free + __len > __o->chunk_limit)			\
      _obstack_newchunk (__o, __len);					\
-   _obstack_memcpy (__o->next_free, (where), __len);			\
+   memcpy (__o->next_free, where, __len);				\
    __o->next_free += __len;						\
    (void) 0; })
 
@@ -401,7 +305,7 @@ __extension__								\
    int __len = (length);						\
    if (__o->next_free + __len + 1 > __o->chunk_limit)			\
      _obstack_newchunk (__o, __len + 1);				\
-   _obstack_memcpy (__o->next_free, (where), __len);			\
+   memcpy (__o->next_free, where, __len);				\
    __o->next_free += __len;						\
    *(__o->next_free)++ = 0;						\
    (void) 0; })
@@ -411,7 +315,7 @@ __extension__								\
 ({ struct obstack *__o = (OBSTACK);					\
    if (__o->next_free + 1 > __o->chunk_limit)				\
      _obstack_newchunk (__o, 1);					\
-   *(__o->next_free)++ = (datum);					\
+   obstack_1grow_fast (__o, datum);					\
    (void) 0; })
 
 /* These assume that the obstack alignment is good enough for pointers
@@ -423,22 +327,28 @@ __extension__								\
 ({ struct obstack *__o = (OBSTACK);					\
    if (__o->next_free + sizeof (void *) > __o->chunk_limit)		\
      _obstack_newchunk (__o, sizeof (void *));				\
-   *((void **)__o->next_free)++ = (datum);				\
-   (void) 0; })
+   obstack_ptr_grow_fast (__o, datum); })				\
 
 # define obstack_int_grow(OBSTACK,datum)				\
 __extension__								\
 ({ struct obstack *__o = (OBSTACK);					\
    if (__o->next_free + sizeof (int) > __o->chunk_limit)		\
      _obstack_newchunk (__o, sizeof (int));				\
-   *((int *)__o->next_free)++ = (datum);				\
-   (void) 0; })
+   obstack_int_grow_fast (__o, datum); })
 
-# define obstack_ptr_grow_fast(h,aptr)					\
-  (*((void **) (h)->next_free)++ = (aptr))
+# define obstack_ptr_grow_fast(OBSTACK,aptr)				\
+__extension__								\
+({ struct obstack *__o1 = (OBSTACK);					\
+   *(const void **) __o1->next_free = (aptr);				\
+   __o1->next_free += sizeof (const void *);				\
+   (void) 0; })
 
-# define obstack_int_grow_fast(h,aint)					\
-  (*((int *) (h)->next_free)++ = (aint))
+# define obstack_int_grow_fast(OBSTACK,aint)				\
+__extension__								\
+({ struct obstack *__o1 = (OBSTACK);					\
+   *(int *) __o1->next_free = (aint);					\
+   __o1->next_free += sizeof (int);					\
+   (void) 0; })
 
 # define obstack_blank(OBSTACK,length)					\
 __extension__								\
@@ -446,7 +356,7 @@ __extension__								\
    int __len = (length);						\
    if (__o->chunk_limit - __o->next_free < __len)			\
      _obstack_newchunk (__o, __len);					\
-   __o->next_free += __len;						\
+   obstack_blank_fast (__o, __len);					\
    (void) 0; })
 
 # define obstack_alloc(OBSTACK,length)					\
@@ -469,21 +379,20 @@ __extension__								\
 
 /* The local variable is named __o1 to avoid a name conflict
    when obstack_blank is called.  */
-# define obstack_finish(OBSTACK)  					\
+# define obstack_finish(OBSTACK)					\
 __extension__								\
 ({ struct obstack *__o1 = (OBSTACK);					\
-   void *value;								\
-   value = (void *) __o1->object_base;					\
-   if (__o1->next_free == value)					\
+   void *__value = (void *) __o1->object_base;				\
+   if (__o1->next_free == __value)					\
      __o1->maybe_empty_object = 1;					\
    __o1->next_free							\
-     = __INT_TO_PTR ((__PTR_TO_INT (__o1->next_free)+__o1->alignment_mask)\
-		     & ~ (__o1->alignment_mask));			\
+     = __PTR_ALIGN (__o1->object_base, __o1->next_free,			\
+		    __o1->alignment_mask);				\
    if (__o1->next_free - (char *)__o1->chunk				\
        > __o1->chunk_limit - (char *)__o1->chunk)			\
      __o1->next_free = __o1->chunk_limit;				\
    __o1->object_base = __o1->next_free;					\
-   value; })
+   __value; })
 
 # define obstack_free(OBSTACK, OBJ)					\
 __extension__								\
@@ -502,7 +411,10 @@ __extension__								\
  (unsigned) ((h)->chunk_limit - (h)->next_free)
 
 # define obstack_empty_p(h) \
- ((h)->chunk->prev == 0 && (h)->next_free - (h)->chunk->contents == 0)
+ ((h)->chunk->prev == 0							\
+  && (h)->next_free == __PTR_ALIGN ((char *) (h)->chunk,		\
+				    (h)->chunk->contents,		\
+				    (h)->alignment_mask))
 
 /* Note that the call to _obstack_newchunk is enclosed in (..., 0)
    so that we can avoid having void expressions
@@ -511,51 +423,51 @@ __extension__								\
    but some compilers won't accept it.  */
 
 # define obstack_make_room(h,length)					\
-( (h)->temp = (length),							\
-  (((h)->next_free + (h)->temp > (h)->chunk_limit)			\
-   ? (_obstack_newchunk ((h), (h)->temp), 0) : 0))
+( (h)->temp.tempint = (length),						\
+  (((h)->next_free + (h)->temp.tempint > (h)->chunk_limit)		\
+   ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0))
 
 # define obstack_grow(h,where,length)					\
-( (h)->temp = (length),							\
-  (((h)->next_free + (h)->temp > (h)->chunk_limit)			\
-   ? (_obstack_newchunk ((h), (h)->temp), 0) : 0),			\
-  _obstack_memcpy ((h)->next_free, (where), (h)->temp),			\
-  (h)->next_free += (h)->temp)
+( (h)->temp.tempint = (length),						\
+  (((h)->next_free + (h)->temp.tempint > (h)->chunk_limit)		\
+   ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0),		\
+  memcpy ((h)->next_free, where, (h)->temp.tempint),			\
+  (h)->next_free += (h)->temp.tempint)
 
 # define obstack_grow0(h,where,length)					\
-( (h)->temp = (length),							\
-  (((h)->next_free + (h)->temp + 1 > (h)->chunk_limit)			\
-   ? (_obstack_newchunk ((h), (h)->temp + 1), 0) : 0),			\
-  _obstack_memcpy ((h)->next_free, (where), (h)->temp),			\
-  (h)->next_free += (h)->temp,						\
+( (h)->temp.tempint = (length),						\
+  (((h)->next_free + (h)->temp.tempint + 1 > (h)->chunk_limit)		\
+   ? (_obstack_newchunk ((h), (h)->temp.tempint + 1), 0) : 0),		\
+  memcpy ((h)->next_free, where, (h)->temp.tempint),			\
+  (h)->next_free += (h)->temp.tempint,					\
   *((h)->next_free)++ = 0)
 
 # define obstack_1grow(h,datum)						\
 ( (((h)->next_free + 1 > (h)->chunk_limit)				\
    ? (_obstack_newchunk ((h), 1), 0) : 0),				\
-  (*((h)->next_free)++ = (datum)))
+  obstack_1grow_fast (h, datum))
 
 # define obstack_ptr_grow(h,datum)					\
 ( (((h)->next_free + sizeof (char *) > (h)->chunk_limit)		\
    ? (_obstack_newchunk ((h), sizeof (char *)), 0) : 0),		\
-  (*((const char **) (((h)->next_free+=sizeof(char *))-sizeof(char *))) = (datum)))
+  obstack_ptr_grow_fast (h, datum))
 
 # define obstack_int_grow(h,datum)					\
 ( (((h)->next_free + sizeof (int) > (h)->chunk_limit)			\
    ? (_obstack_newchunk ((h), sizeof (int)), 0) : 0),			\
-  (*((int *) (((h)->next_free+=sizeof(int))-sizeof(int))) = (datum)))
+  obstack_int_grow_fast (h, datum))
 
 # define obstack_ptr_grow_fast(h,aptr)					\
-  (*((const char **) (h)->next_free)++ = (aptr))
+  (((const void **) ((h)->next_free += sizeof (void *)))[-1] = (aptr))
 
 # define obstack_int_grow_fast(h,aint)					\
-  (*((int *) (h)->next_free)++ = (aint))
+  (((int *) ((h)->next_free += sizeof (int)))[-1] = (aint))
 
 # define obstack_blank(h,length)					\
-( (h)->temp = (length),							\
-  (((h)->chunk_limit - (h)->next_free < (h)->temp)			\
-   ? (_obstack_newchunk ((h), (h)->temp), 0) : 0),			\
-  ((h)->next_free += (h)->temp))
+( (h)->temp.tempint = (length),						\
+  (((h)->chunk_limit - (h)->next_free < (h)->temp.tempint)		\
+   ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0),		\
+  obstack_blank_fast (h, (h)->temp.tempint))
 
 # define obstack_alloc(h,length)					\
  (obstack_blank ((h), (length)), obstack_finish ((h)))
@@ -566,35 +478,27 @@ __extension__								\
 # define obstack_copy0(h,where,length)					\
  (obstack_grow0 ((h), (where), (length)), obstack_finish ((h)))
 
-# define obstack_finish(h)  						\
+# define obstack_finish(h)						\
 ( ((h)->next_free == (h)->object_base					\
    ? (((h)->maybe_empty_object = 1), 0)					\
    : 0),								\
-  (h)->temp = __PTR_TO_INT ((h)->object_base),				\
+  (h)->temp.tempptr = (h)->object_base,					\
   (h)->next_free							\
-    = __INT_TO_PTR ((__PTR_TO_INT ((h)->next_free)+(h)->alignment_mask)	\
-		    & ~ ((h)->alignment_mask)),				\
+    = __PTR_ALIGN ((h)->object_base, (h)->next_free,			\
+		   (h)->alignment_mask),				\
   (((h)->next_free - (char *) (h)->chunk				\
     > (h)->chunk_limit - (char *) (h)->chunk)				\
    ? ((h)->next_free = (h)->chunk_limit) : 0),				\
   (h)->object_base = (h)->next_free,					\
-  __INT_TO_PTR ((h)->temp))
+  (h)->temp.tempptr)
 
-# if defined __STDC__ && __STDC__
-#  define obstack_free(h,obj)						\
-( (h)->temp = (char *) (obj) - (char *) (h)->chunk,			\
-  (((h)->temp > 0 && (h)->temp < (h)->chunk_limit - (char *) (h)->chunk)\
-   ? (int) ((h)->next_free = (h)->object_base				\
-	    = (h)->temp + (char *) (h)->chunk)				\
-   : (((obstack_free) ((h), (h)->temp + (char *) (h)->chunk), 0), 0)))
-# else
-#  define obstack_free(h,obj)						\
-( (h)->temp = (char *) (obj) - (char *) (h)->chunk,			\
-  (((h)->temp > 0 && (h)->temp < (h)->chunk_limit - (char *) (h)->chunk)\
+# define obstack_free(h,obj)						\
+( (h)->temp.tempint = (char *) (obj) - (char *) (h)->chunk,		\
+  ((((h)->temp.tempint > 0						\
+    && (h)->temp.tempint < (h)->chunk_limit - (char *) (h)->chunk))	\
    ? (int) ((h)->next_free = (h)->object_base				\
-	    = (h)->temp + (char *) (h)->chunk)				\
-   : (_obstack_free ((h), (h)->temp + (char *) (h)->chunk), 0)))
-# endif
+	    = (h)->temp.tempint + (char *) (h)->chunk)			\
+   : (((obstack_free) ((h), (h)->temp.tempint + (char *) (h)->chunk), 0), 0)))
 
 #endif /* not __GNUC__ or not __STDC__ */