diff options
| author | Marc Mutz <marc.mutz@kdab.com> | 2014-02-12 14:10:35 +0100 |
|---|---|---|
| committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-02-28 21:27:41 +0100 |
| commit | 12372960f8ab3c50231c4f5c21aa6a87c69e9915 (patch) | |
| tree | d4aec4dbfb80f621e2f48c83dfa5a76e2ea7caf4 /src/corelib/tools/qhash.h | |
| parent | f4ffe2a2439928992c3f44085e81686d4f911417 (diff) | |
Add qHashBits(), a hash function for a memory block
The function arguments have been chosen to avoid caller-side casting of
argument types, when passing object addresses and type sizeof()s.
[ChangeLog][QtCore] Added qHashBits() to aid implementing qHash() overloads
for custom types.
Change-Id: I983a8560769bb27e489f23ebb6db51850ddd65f2
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/tools/qhash.h')
| -rw-r--r-- | src/corelib/tools/qhash.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/corelib/tools/qhash.h b/src/corelib/tools/qhash.h index 409774a76d..4af2d4878e 100644 --- a/src/corelib/tools/qhash.h +++ b/src/corelib/tools/qhash.h @@ -60,6 +60,8 @@ class QString; class QStringRef; class QLatin1String; +Q_CORE_EXPORT uint qHashBits(const void *p, size_t size, uint seed = 0) Q_DECL_NOTHROW; + inline uint qHash(char key, uint seed = 0) Q_DECL_NOTHROW { return uint(key) ^ seed; } inline uint qHash(uchar key, uint seed = 0) Q_DECL_NOTHROW { return uint(key) ^ seed; } inline uint qHash(signed char key, uint seed = 0) Q_DECL_NOTHROW { return uint(key) ^ seed; } |