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| author | Rafael Roquetto <rafael.roquetto.qnx@kdab.com> | 2012-07-24 15:45:44 +0200 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-07-25 18:46:24 +0200 |
| commit | e0bcf88ffd02a504bf3398dae1a667ec101afee6 (patch) | |
| tree | 23c44bd79b207988410802a74817cb582607b0c8 /qmake | |
| parent | 89c8b1908ccaf13e6722bb7f2344f46fe6ba7e15 (diff) | |
| download | qt4-tools-e0bcf88ffd02a504bf3398dae1a667ec101afee6.tar.gz | |
Fix qmake hash function to use XOR
Use XOR instead of OR in order to avoid saturating all bits when computing the
hash value.
cherry-picked from qt5/qtbase: 3a27d4b480214072d972ac67561f2ee4010f8baa
Change-Id: I582e5b3c42d6436395555a54c6826509d6243ed4
Reviewed-by: Andreas Holzammer <andreas.holzammer@kdab.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Diffstat (limited to 'qmake')
| -rw-r--r-- | qmake/cachekeys.h | 4 | ||||
| -rw-r--r-- | qmake/generators/makefile.h | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/qmake/cachekeys.h b/qmake/cachekeys.h index 64d068a6e6..11f5fbf8d2 100644 --- a/qmake/cachekeys.h +++ b/qmake/cachekeys.h @@ -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) { diff --git a/qmake/generators/makefile.h b/qmake/generators/makefile.h index 1e82e786d0..9ff75c8b42 100644 --- a/qmake/generators/makefile.h +++ b/qmake/generators/makefile.h @@ -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; } }; |