mirror of https://github.com/OpenMW/openmw.git
Replace BSAOpt hash calculation with a custom function
Capostrophic
6 years ago
parent
c2fd4c1f46
commit
c9df63ffd1
@ -1,17 +0,0 @@
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cmake_minimum_required(VERSION 2.8)
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# This is NOT intended as a stand-alone build system! Instead, you should include this from the main CMakeLists of your project.
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set(BSAOPTHASH_LIBRARY "bsaopthash")
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# Sources
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set(SOURCE_FILES
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hash.cpp
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)
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add_library(${BSAOPTHASH_LIBRARY} STATIC ${SOURCE_FILES})
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set(BSAOPTHASH_LIBRARIES ${BSAOPTHASH_LIBRARY})
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link_directories(${CMAKE_CURRENT_BINARY_DIR})
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set(BSAOPTHASH_LIBRARIES ${BSAOPTHASH_LIBRARIES} PARENT_SCOPE)
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@ -1,109 +0,0 @@
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/* Version: MPL 1.1/LGPL 3.0
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*
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* "The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is BSAopt.
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*
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* The Initial Developer of the Original Code is
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* Ethatron <niels@paradice-insight.us>. Portions created by The Initial
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* Developer are Copyright (C) 2011 The Initial Developer.
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* All Rights Reserved.
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*
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* Alternatively, the contents of this file may be used under the terms
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* of the GNU Library General Public License Version 3 license (the
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* "LGPL License"), in which case the provisions of LGPL License are
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* applicable instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the LGPL License and not
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* to allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and replace
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* them with the notice and other provisions required by the LGPL License.
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* If you do not delete the provisions above, a recipient may use your
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* version of this file under either the MPL or the LGPL License."
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*/
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#include <cstdint>
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#include <algorithm>
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#include <cstring>
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#include "hash.hpp"
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std::uint32_t GenOBHashStr(const std::string& s) {
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std::uint32_t hash = 0;
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for (std::size_t i = 0; i < s.length(); i++) {
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hash *= 0x1003F;
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hash += (unsigned char)s[i];
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}
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return hash;
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}
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std::uint64_t GenOBHashPair(const std::string& fle, const std::string& ext) {
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std::uint64_t hash = 0;
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if (fle.length() > 0) {
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hash = (std::uint64_t)(
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(((unsigned char)fle[fle.length() - 1]) * 0x1) +
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((fle.length() > 2 ? (unsigned char)fle[fle.length() - 2] : (unsigned char)0) * 0x100) +
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(fle.length() * 0x10000) +
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(((unsigned char)fle[0]) * 0x1000000)
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);
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if (fle.length() > 3) {
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hash += (std::uint64_t)(GenOBHashStr(fle.substr(1, fle.length() - 3)) * 0x100000000);
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}
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}
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if (ext.length() > 0) {
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hash += (std::uint64_t)(GenOBHashStr(ext) * 0x100000000LL);
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unsigned char i = 0;
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if (ext == ".nif") i = 1;
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if (ext == ".kf" ) i = 2;
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if (ext == ".dds") i = 3;
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if (ext == ".wav") i = 4;
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if (i != 0) {
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unsigned char a = (unsigned char)(((i & 0xfc ) << 5) + (unsigned char)((hash & 0xff000000) >> 24));
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unsigned char b = (unsigned char)(((i & 0xfe ) << 6) + (unsigned char)( hash & 0x000000ff) );
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unsigned char c = (unsigned char)(( i << 7) + (unsigned char)((hash & 0x0000ff00) >> 8));
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hash -= hash & 0xFF00FFFF;
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hash += (std::uint32_t)((a << 24) + b + (c << 8));
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}
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}
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return hash;
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}
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std::uint64_t GenOBHash(const std::string& path, std::string& file) {
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std::transform(file.begin(), file.end(), file.begin(), ::tolower);
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std::replace(file.begin(), file.end(), '/', '\\');
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std::string fle;
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std::string ext;
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const char *_fle = file.data();
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const char *_ext = strrchr(_fle, '.');
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if (_ext) {
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ext = file.substr((0 + _ext) - _fle);
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fle = file.substr(0, ( _ext) - _fle);
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}
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else {
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ext = "";
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fle = file;
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}
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if (path.length() && fle.length())
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return GenOBHashPair(path + "\\" + fle, ext);
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else
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return GenOBHashPair(path + fle, ext);
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}
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@ -1,42 +0,0 @@
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/* Version: MPL 1.1/LGPL 3.0
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*
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* "The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is BSAopt.
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*
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* The Initial Developer of the Original Code is
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* Ethatron <niels@paradice-insight.us>. Portions created by The Initial
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* Developer are Copyright (C) 2011 The Initial Developer.
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* All Rights Reserved.
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*
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* Alternatively, the contents of this file may be used under the terms
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* of the GNU Library General Public License Version 3 license (the
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* "LGPL License"), in which case the provisions of LGPL License are
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* applicable instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the LGPL License and not
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* to allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and replace
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* them with the notice and other provisions required by the LGPL License.
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* If you do not delete the provisions above, a recipient may use your
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* version of this file under either the MPL or the LGPL License."
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*/
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#ifndef BSAOPT_HASH_H
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#define BSAOPT_HASH_H
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#include <string>
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std::uint32_t GenOBHashStr(const std::string& s);
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std::uint64_t GenOBHashPair(const std::string& fle, const std::string& ext);
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std::uint64_t GenOBHash(const std::string& path, std::string& file);
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#endif // BSAOPT_HASH_H
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