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| author | Alexey Andreyev <aa13q@ya.ru> | 2019-05-15 16:36:02 +0300 |
|---|---|---|
| committer | Alexey Andreyev <aa13q@ya.ru> | 2019-05-23 02:12:56 +0300 |
| commit | 48ffee5fa78f44bd00d76772ad79ae4eeb6c8dc4 (patch) | |
| tree | 7dd9996a3e89f36a942617a740fd33c069871e1e /lib/util.cpp | |
| parent | d6f39dcb0de69322479f287514a8c36afcb3fe7b (diff) | |
| download | libquotient-48ffee5fa78f44bd00d76772ad79ae4eeb6c8dc4.tar.gz libquotient-48ffee5fa78f44bd00d76772ad79ae4eeb6c8dc4.zip | |
Move out the logic of the hue calculation to utils
Diffstat (limited to 'lib/util.cpp')
| -rw-r--r-- | lib/util.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/util.cpp b/lib/util.cpp index 4e17d2f9..01d4e77b 100644 --- a/lib/util.cpp +++ b/lib/util.cpp @@ -23,6 +23,10 @@ #include <QtCore/QDir> #include <QtCore/QStringBuilder> +#include <QtCore/QCryptographicHash> +#include <QtCore/QtEndian> +#include <QtCore/QDataStream> + static const auto RegExpOptions = QRegularExpression::CaseInsensitiveOption | QRegularExpression::OptimizeOnFirstUsageOption @@ -93,6 +97,21 @@ QString QMatrixClient::cacheLocation(const QString& dirName) return cachePath; } +qreal QMatrixClient::stringToHueF(const QString &string) +{ + Q_ASSERT(!string.isEmpty()); + QByteArray hash = QCryptographicHash::hash(string.toUtf8(), + QCryptographicHash::Sha1); + QDataStream dataStream(qToLittleEndian(hash).left(2)); + dataStream.setByteOrder(QDataStream::LittleEndian); + quint16 hashValue; + dataStream >> hashValue; + const auto hueF = + qreal(hashValue)/std::numeric_limits<quint16>::max(); + Q_ASSERT((0 <= hueF) && (hueF <= 1)); + return hueF; +} + // Tests for function_traits<> #ifdef Q_CC_CLANG |