From: Timo Sirainen <tss@iki.fi>
Date: Fri, 5 Feb 2010 22:38:04 +0000 (+0200)
Subject: lib-index: Changed strmap's crc32 field to be backwards compatible.
X-Git-Tag: 2.0.beta3~158
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=77463499e3a97a9b386e27fb1e6409263726ef5b;p=thirdparty%2Fdovecot%2Fcore.git

lib-index: Changed strmap's crc32 field to be backwards compatible.

--HG--
branch : HEAD
---

diff --git a/src/lib-index/mail-index-strmap.c b/src/lib-index/mail-index-strmap.c
index af712ac50d..abcde3a0dc 100644
--- a/src/lib-index/mail-index-strmap.c
+++ b/src/lib-index/mail-index-strmap.c
@@ -742,7 +742,10 @@ mail_index_strmap_view_sync_init(struct mail_index_strmap_view *view,
 
 static inline uint32_t crc32_str_nonzero(const char *str)
 {
-	uint32_t value = crc32_str(str);
+	/* we'll flip the bits because of a bug in our old crc32 code.
+	   this keeps the index format backwards compatible with the new fixed
+	   crc32 code. */
+	uint32_t value = crc32_str(str) ^ 0xffffffffU;
 	return value == 0 ? 1 : value;
 }