AuroraMiddleware/qt5base-lts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix qmake hash function to use XOR

Browse Source 
Use XOR instead of OR in order to avoid saturating all bits when computing the
hash value.

Change-Id: I50b1a044eb827239dae1c04732ca6a065f6233b4
Reviewed-by: Andreas Holzammer <andreas.holzammer@kdab.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
This commit is contained in:
Rafael Roquetto 2012-07-24 15:45:44 +02:00 committed by Qt by Nokia
parent 4677cf3d01
commit 3a27d4b480
2 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
qmake/cachekeys.h
View File

@ -73,7 +73,7 @@ struct FixStringCacheKey
}
inline uint hashCode() const {
if(!hash)
hash = qHash(string) | qHash(flags) /*| qHash(pwd)*/;
hash = qHash(string) ^ qHash(flags) /*^ qHash(pwd)*/;
return hash;
}
};
@ -98,7 +98,7 @@ struct FileInfoCacheKey
}
inline uint hashCode() const {
if(!hash)
hash = qHash(file) /*| qHash(pwd)*/;
hash = qHash(file) /*^ qHash(pwd)*/;
return hash;
}
inline bool isRelativePath(const QString &file) {

2
qmake/generators/makefile.h
View File

@ -68,7 +68,7 @@ struct ReplaceExtraCompilerCacheKey
bool operator==(const ReplaceExtraCompilerCacheKey &f) const;
inline uint hashCode() const {
if(!hash)
hash = qHash(var) | qHash(in) | qHash(out) /*| qHash(pwd)*/;
hash = qHash(var) ^ qHash(in) ^ qHash(out) /*^ qHash(pwd)*/;
return hash;
}
};