From 3dec705e020f4e9a0dcd618b5addcf9bc7fb2bb6 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Tue, 10 Aug 2004 05:16:29 +0000 Subject: [PATCH] (obstack_empty_p): Don't assume that chunk->contents is suitably aligned. --- lib/obstack.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/lib/obstack.h b/lib/obstack.h index d46b0544a4..46a1cb781a 100644 --- a/lib/obstack.h +++ b/lib/obstack.h @@ -287,7 +287,10 @@ __extension__ \ # define obstack_empty_p(OBSTACK) \ __extension__ \ ({ struct obstack const *__o = (OBSTACK); \ - (__o->chunk->prev == 0 && __o->next_free - __o->chunk->contents == 0); }) + (__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__ \ @@ -411,7 +414,10 @@ __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 -- 2.30.2