diff options
Diffstat (limited to 'src/Runtime/ogl-runtime/src/system/Qt3DSHash.h')
| m--------- | src/Runtime/ogl-runtime | 0 | ||||
| -rw-r--r-- | src/Runtime/ogl-runtime/src/system/Qt3DSHash.h | 105 |
2 files changed, 0 insertions, 105 deletions
diff --git a/src/Runtime/ogl-runtime b/src/Runtime/ogl-runtime new file mode 160000 +Subproject 2025912174c4cf99270b7439ec3b021e1d089ae diff --git a/src/Runtime/ogl-runtime/src/system/Qt3DSHash.h b/src/Runtime/ogl-runtime/src/system/Qt3DSHash.h deleted file mode 100644 index 8baa2dba..00000000 --- a/src/Runtime/ogl-runtime/src/system/Qt3DSHash.h +++ /dev/null @@ -1,105 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 1993-2009 NVIDIA Corporation. -** Copyright (C) 2017 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of Qt 3D Studio. -** -** $QT_BEGIN_LICENSE:GPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3 or (at your option) any later version -** approved by the KDE Free Qt Foundation. The licenses are as published by -** the Free Software Foundation and appearing in the file LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#pragma once -#include "Qt3DSConfig.h" - -//============================================================================== -// Namespace -//============================================================================== -namespace Q3DStudio { - -//============================================================================== -/** - * Utility class transforming a string into a hash value. - */ -class CHash -{ - //============================================================================== - // Methods - //============================================================================== -public: // Static utility - //============================================================================== - /** - * We use the hashing algorithm called "sdbm". - * - * This algorithm was created from sdbm (a public-domain reimplementation - * of ndbm) database library. It was found to do well in scrambling bits, - * causing better distribution of the keys and fewer splits. it also happens - * to be a good general hashing function with good distribution. the actual - * function is hash(i) = hash(i - 1) * 65599 + str[i]; what is included below - * is the faster version used in gawk. [there is even a faster, duff-device - * version] the magic constant 65599 was picked out of thin air while - * experimenting with different constants, and turns out to be a prime. this - * is one of the algorithms used in berkeley db (see sleepycat) and elsewhere. - * - * @param inString the string to hash - * @return the hash value - */ - static TStringHash HashString(const CHAR *inString) - { - TStringHash theHash = 0; - INT32 theChar = *inString; - INT32 theCount = 0; - while (theChar && (theCount < HASH_LIMIT)) { - theChar = *inString++; - theHash = theChar + (theHash << 6) + (theHash << 16) - theHash; - ++theCount; - } - - return theHash; - } - - //============================================================================== - /** - * 31-bit hash with MSB set to 0 - * - * @param inString the string to hash - * @return the 31-bit hash value - */ - static TEventCommandHash HashEventCommand(const CHAR *inString) - { - return HashString(inString) & 0x7fffffff; - } - - //============================================================================== - /** - * 26-bit hash with MSBs all set to 0 - * - * @param inString the string to hash - * @return the 26-bit hash value - */ - static TAttributeHash HashAttribute(const CHAR *inString) - { - return HashString(inString) & 0x03ffffff; - } -}; - -} // namespace Q3DStudio |