From: Wilfried Goesgens <willi@arangodb.com>
Date: Sun, 3 Jan 2016 16:05:16 +0000 (+0100)
Subject: Add macro to calculate a hash from a part of the message id
X-Git-Tag: Release_902~80
X-Git-Url: https://code.citadel.org/?p=citadel.git;a=commitdiff_plain;h=32ba61afbc6f9964bac00c006b0058ef23a3518d

Add macro to calculate a hash from a part of the message id
---

diff --git a/libcitadel/lib/libcitadel.h b/libcitadel/lib/libcitadel.h
index 3a4d7a18b..366b8a62c 100644
--- a/libcitadel/lib/libcitadel.h
+++ b/libcitadel/lib/libcitadel.h
@@ -677,6 +677,7 @@ extern ConstStr RoomNetCfgStrs[maxRoomNetCfg];
 
 /* a nice consistent place to define how we turn a message id into a thread id hash */
 #define ThreadIdHash(Buf) abs(HashLittle(ChrPtr(Buf), StrLength(Buf)))
+#define ThreadIdHashOffset(Buf, Offset) abs(HashLittle(ChrPtr(Buf) + Offset, StrLength(Buf)-Offset))
 
 #ifdef __cplusplus
 extern "C" {