add assimp library code
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223
libs/assimp/code/Common/DefaultIOSystem.cpp
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223
libs/assimp/code/Common/DefaultIOSystem.cpp
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/*
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---------------------------------------------------------------------------
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Open Asset Import Library (assimp)
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---------------------------------------------------------------------------
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Copyright (c) 2006-2021, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the following
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conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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---------------------------------------------------------------------------
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*/
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/** @file Default implementation of IOSystem using the standard C file functions */
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#include <assimp/StringComparison.h>
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#include <assimp/DefaultIOStream.h>
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#include <assimp/DefaultIOSystem.h>
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#include <assimp/ai_assert.h>
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#include <stdlib.h>
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#include <assimp/DefaultLogger.hpp>
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#ifdef __unix__
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# include <stdlib.h>
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# include <sys/param.h>
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#endif
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#ifdef _WIN32
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# include <windows.h>
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#endif
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using namespace Assimp;
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#ifdef _WIN32
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const std::wstring wdummy;
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static std::wstring Utf8ToWide(const char *in) {
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if (nullptr == in) {
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return wdummy;
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}
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int size = MultiByteToWideChar(CP_UTF8, 0, in, -1, nullptr, 0);
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// size includes terminating null; std::wstring adds null automatically
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std::wstring out(static_cast<size_t>(size) - 1, L'\0');
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MultiByteToWideChar(CP_UTF8, 0, in, -1, &out[0], size);
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return out;
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}
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const std::string dummy;
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static std::string WideToUtf8(const wchar_t *in) {
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if (nullptr == in) {
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return dummy;
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}
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int size = WideCharToMultiByte(CP_UTF8, 0, in, -1, nullptr, 0, nullptr, nullptr);
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// size includes terminating null; std::string adds null automatically
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std::string out(static_cast<size_t>(size) - 1, '\0');
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WideCharToMultiByte(CP_UTF8, 0, in, -1, &out[0], size, nullptr, nullptr);
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return out;
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}
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#endif
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// ------------------------------------------------------------------------------------------------
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// Tests for the existence of a file at the given path.
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bool DefaultIOSystem::Exists(const char *pFile) const {
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#ifdef _WIN32
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struct __stat64 filestat;
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if (_wstat64(Utf8ToWide(pFile).c_str(), &filestat) != 0) {
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return false;
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}
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#else
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FILE *file = ::fopen(pFile, "rb");
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if (!file) {
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return false;
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}
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::fclose(file);
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#endif
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return true;
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}
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// ------------------------------------------------------------------------------------------------
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// Open a new file with a given path.
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IOStream *DefaultIOSystem::Open(const char *strFile, const char *strMode) {
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ai_assert(strFile != nullptr);
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ai_assert(strMode != nullptr);
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FILE *file;
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#ifdef _WIN32
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std::wstring name = Utf8ToWide(strFile);
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if (name.empty()) {
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return nullptr;
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}
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file = ::_wfopen(name.c_str(), Utf8ToWide(strMode).c_str());
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#else
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file = ::fopen(strFile, strMode);
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#endif
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if (!file) {
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return nullptr;
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}
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return new DefaultIOStream(file, strFile);
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}
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// ------------------------------------------------------------------------------------------------
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// Closes the given file and releases all resources associated with it.
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void DefaultIOSystem::Close(IOStream *pFile) {
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delete pFile;
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}
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// ------------------------------------------------------------------------------------------------
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// Returns the operation specific directory separator
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char DefaultIOSystem::getOsSeparator() const {
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#ifndef _WIN32
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return '/';
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#else
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return '\\';
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#endif
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}
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// ------------------------------------------------------------------------------------------------
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// IOSystem default implementation (ComparePaths isn't a pure virtual function)
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bool IOSystem::ComparePaths(const char *one, const char *second) const {
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return !ASSIMP_stricmp(one, second);
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}
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// ------------------------------------------------------------------------------------------------
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// Convert a relative path into an absolute path
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inline static std::string MakeAbsolutePath(const char *in) {
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ai_assert(in);
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std::string out;
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#ifdef _WIN32
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wchar_t *ret = ::_wfullpath(nullptr, Utf8ToWide(in).c_str(), 0);
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if (ret) {
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out = WideToUtf8(ret);
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free(ret);
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}
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#else
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char *ret = realpath(in, nullptr);
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if (ret) {
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out = ret;
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free(ret);
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}
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#endif
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if (!ret) {
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// preserve the input path, maybe someone else is able to fix
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// the path before it is accessed (e.g. our file system filter)
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ASSIMP_LOG_WARN_F("Invalid path: ", std::string(in));
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out = in;
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}
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return out;
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}
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// ------------------------------------------------------------------------------------------------
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// DefaultIOSystem's more specialized implementation
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bool DefaultIOSystem::ComparePaths(const char *one, const char *second) const {
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// chances are quite good both paths are formatted identically,
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// so we can hopefully return here already
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if (!ASSIMP_stricmp(one, second))
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return true;
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std::string temp1 = MakeAbsolutePath(one);
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std::string temp2 = MakeAbsolutePath(second);
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return !ASSIMP_stricmp(temp1, temp2);
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}
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// ------------------------------------------------------------------------------------------------
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std::string DefaultIOSystem::fileName(const std::string &path) {
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std::string ret = path;
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std::size_t last = ret.find_last_of("\\/");
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if (last != std::string::npos) ret = ret.substr(last + 1);
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return ret;
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}
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// ------------------------------------------------------------------------------------------------
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std::string DefaultIOSystem::completeBaseName(const std::string &path) {
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std::string ret = fileName(path);
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std::size_t pos = ret.find_last_of('.');
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if (pos != std::string::npos) ret = ret.substr(0, pos);
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return ret;
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}
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// ------------------------------------------------------------------------------------------------
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std::string DefaultIOSystem::absolutePath(const std::string &path) {
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std::string ret = path;
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std::size_t last = ret.find_last_of("\\/");
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if (last != std::string::npos) ret = ret.substr(0, last);
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return ret;
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}
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// ------------------------------------------------------------------------------------------------
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