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assimp/code/DefaultIOSystem.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------
Copyright (c) 2006-2018, assimp team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the following
conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.
* Neither the name of the assimp team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the assimp team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------
*/
/** @file Default implementation of IOSystem using the standard C file functions */
#include <assimp/StringComparison.h>
#include <assimp/DefaultIOSystem.h>
#include <assimp/DefaultIOStream.h>
#include <assimp/DefaultLogger.hpp>
#include <assimp/ai_assert.h>
#include <stdlib.h>
#ifdef __unix__
#include <sys/param.h>
#include <stdlib.h>
#endif
#ifdef _WIN32
#include <windows.h>
#endif
using namespace Assimp;
// maximum path length
// XXX http://insanecoding.blogspot.com/2007/11/pathmax-simply-isnt.html
#ifdef PATH_MAX
# define PATHLIMIT PATH_MAX
#else
# define PATHLIMIT 4096
#endif
// ------------------------------------------------------------------------------------------------
// Tests for the existence of a file at the given path.
bool DefaultIOSystem::Exists( const char* pFile) const
{
#ifdef _WIN32
wchar_t fileName16[PATHLIMIT];
bool isUnicode = IsTextUnicode(pFile, static_cast<int>(strlen(pFile)), NULL);
if (isUnicode) {
MultiByteToWideChar(CP_UTF8, MB_PRECOMPOSED, pFile, -1, fileName16, PATHLIMIT);
struct _stat64 filestat;
if (0 != _wstat64(fileName16, &filestat)) {
return false;
}
} else {
FILE* file = ::fopen(pFile, "rb");
if (!file)
return false;
::fclose(file);
}
#else
FILE* file = ::fopen( pFile, "rb");
if( !file)
return false;
::fclose( file);
#endif
return true;
}
// ------------------------------------------------------------------------------------------------
// Open a new file with a given path.
IOStream* DefaultIOSystem::Open( const char* strFile, const char* strMode)
{
ai_assert(NULL != strFile);
ai_assert(NULL != strMode);
FILE* file;
#ifdef _WIN32
wchar_t fileName16[PATHLIMIT];
bool isUnicode = IsTextUnicode(strFile, static_cast<int>(strlen(strFile)), NULL );
if (isUnicode) {
MultiByteToWideChar(CP_UTF8, MB_PRECOMPOSED, strFile, -1, fileName16, PATHLIMIT);
std::string mode8(strMode);
file = ::_wfopen(fileName16, std::wstring(mode8.begin(), mode8.end()).c_str());
} else {
file = ::fopen(strFile, strMode);
}
#else
file = ::fopen(strFile, strMode);
#endif
if (nullptr == file)
return nullptr;
return new DefaultIOStream(file, (std::string) strFile);
}
// ------------------------------------------------------------------------------------------------
// Closes the given file and releases all resources associated with it.
void DefaultIOSystem::Close( IOStream* pFile)
{
delete pFile;
}
// ------------------------------------------------------------------------------------------------
// Returns the operation specific directory separator
char DefaultIOSystem::getOsSeparator() const
{
#ifndef _WIN32
return '/';
#else
return '\\';
#endif
}
// ------------------------------------------------------------------------------------------------
// IOSystem default implementation (ComparePaths isn't a pure virtual function)
bool IOSystem::ComparePaths (const char* one, const char* second) const
{
return !ASSIMP_stricmp(one,second);
}
// ------------------------------------------------------------------------------------------------
// Convert a relative path into an absolute path
inline static void MakeAbsolutePath (const char* in, char* _out)
{
ai_assert(in && _out);
#if defined( _MSC_VER ) || defined( __MINGW32__ )
bool isUnicode = IsTextUnicode(in, static_cast<int>(strlen(in)), NULL);
if (isUnicode) {
wchar_t out16[PATHLIMIT];
wchar_t in16[PATHLIMIT];
MultiByteToWideChar(CP_UTF8, MB_PRECOMPOSED, in, -1, out16, PATHLIMIT);
wchar_t* ret = ::_wfullpath(out16, in16, PATHLIMIT);
if (ret) {
WideCharToMultiByte(CP_UTF8, MB_PRECOMPOSED, out16, -1, _out, PATHLIMIT, nullptr, nullptr);
}
if (!ret) {
// preserve the input path, maybe someone else is able to fix
// the path before it is accessed (e.g. our file system filter)
ASSIMP_LOG_WARN_F("Invalid path: ", std::string(in));
strcpy(_out, in);
}
} else {
char* ret = :: _fullpath(_out, in, PATHLIMIT);
if (!ret) {
// preserve the input path, maybe someone else is able to fix
// the path before it is accessed (e.g. our file system filter)
ASSIMP_LOG_WARN_F("Invalid path: ", std::string(in));
strcpy(_out, in);
}
}
#else
// use realpath
char* ret = realpath(in, _out);
if(!ret) {
// preserve the input path, maybe someone else is able to fix
// the path before it is accessed (e.g. our file system filter)
ASSIMP_LOG_WARN_F("Invalid path: ", std::string(in));
strcpy(_out,in);
}
#endif
}
// ------------------------------------------------------------------------------------------------
// DefaultIOSystem's more specialized implementation
bool DefaultIOSystem::ComparePaths (const char* one, const char* second) const
{
// chances are quite good both paths are formatted identically,
// so we can hopefully return here already
if( !ASSIMP_stricmp(one,second) )
return true;
char temp1[PATHLIMIT];
char temp2[PATHLIMIT];
MakeAbsolutePath (one, temp1);
MakeAbsolutePath (second, temp2);
return !ASSIMP_stricmp(temp1,temp2);
}
// ------------------------------------------------------------------------------------------------
std::string DefaultIOSystem::fileName( const std::string &path )
{
std::string ret = path;
std::size_t last = ret.find_last_of("\\/");
if (last != std::string::npos) ret = ret.substr(last + 1);
return ret;
}
// ------------------------------------------------------------------------------------------------
std::string DefaultIOSystem::completeBaseName( const std::string &path )
{
std::string ret = fileName(path);
std::size_t pos = ret.find_last_of('.');
if(pos != ret.npos) ret = ret.substr(0, pos);
return ret;
}
// ------------------------------------------------------------------------------------------------
std::string DefaultIOSystem::absolutePath( const std::string &path )
{
std::string ret = path;
std::size_t last = ret.find_last_of("\\/");
if (last != std::string::npos) ret = ret.substr(0, last);
return ret;
}
// ------------------------------------------------------------------------------------------------
#undef PATHLIMIT
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