From: Jeff King <peff@peff.net>
Date: Fri, 13 Sep 2019 13:02:20 +0000 (+0200)
Subject: ewah/bitmap: always allocate 2 more words
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=df75281e78ce6036fbe627331611e86050269538;p=git

ewah/bitmap: always allocate 2 more words

In a following patch we will allocate a variable number
of words in some bitmaps. When iterating over the words we
will need a mark to tell us when to stop iterating. Let's
always allocate 2 more words, that will always contain 0,
as that mark.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---

diff --git a/ewah/bitmap.c b/ewah/bitmap.c
index 143dc71419..eac05485f1 100644
--- a/ewah/bitmap.c
+++ b/ewah/bitmap.c
@@ -41,7 +41,7 @@ void bitmap_set(struct bitmap *self, size_t pos)
 
 	if (block >= self->word_alloc) {
 		size_t old_size = self->word_alloc;
-		self->word_alloc = block * 2;
+		self->word_alloc = (block + 1) * 2;
 		REALLOC_ARRAY(self->words, self->word_alloc);
 		memset(self->words + old_size, 0x0,
 			(self->word_alloc - old_size) * sizeof(eword_t));