/* --------------------------------------------------------------------------- Open Asset Import Library (assimp) --------------------------------------------------------------------------- Copyright (c) 2006-2020, 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 DefaultLogger.cpp * @brief Implementation of DefaultLogger (and Logger) */ // Default log streams #include "Win32DebugLogStream.h" #include "StdOStreamLogStream.h" #include "FileLogStream.h" #include #include #include #include #include #include #include #ifndef ASSIMP_BUILD_SINGLETHREADED # include # include std::mutex loggerMutex; #endif namespace Assimp { // ---------------------------------------------------------------------------------- NullLogger DefaultLogger::s_pNullLogger; Logger *DefaultLogger::m_pLogger = &DefaultLogger::s_pNullLogger; static const unsigned int SeverityAll = Logger::Info | Logger::Err | Logger::Warn | Logger::Debugging; // ---------------------------------------------------------------------------------- // Represents a log-stream + its error severity struct LogStreamInfo { unsigned int m_uiErrorSeverity; LogStream *m_pStream; // Constructor LogStreamInfo( unsigned int uiErrorSev, LogStream *pStream ) : m_uiErrorSeverity( uiErrorSev ), m_pStream( pStream ) { // empty } // Destructor ~LogStreamInfo() { delete m_pStream; } }; // ---------------------------------------------------------------------------------- // Construct a default log stream LogStream* LogStream::createDefaultStream(aiDefaultLogStream streams, const char* name /*= "AssimpLog.txt"*/, IOSystem* io /*= NULL*/) { switch (streams) { // This is a platform-specific feature case aiDefaultLogStream_DEBUGGER: #ifdef WIN32 return new Win32DebugLogStream(); #else return nullptr; #endif // Platform-independent default streams case aiDefaultLogStream_STDERR: return new StdOStreamLogStream(std::cerr); case aiDefaultLogStream_STDOUT: return new StdOStreamLogStream(std::cout); case aiDefaultLogStream_FILE: return (name && *name ? new FileLogStream(name,io) : nullptr ); default: // We don't know this default log stream, so raise an assertion ai_assert(false); }; // For compilers without dead code path detection return nullptr; } // ---------------------------------------------------------------------------------- // Creates the only singleton instance Logger *DefaultLogger::create(const char* name /*= "AssimpLog.txt"*/, LogSeverity severity /*= NORMAL*/, unsigned int defStreams /*= aiDefaultLogStream_DEBUGGER | aiDefaultLogStream_FILE*/, IOSystem* io /*= NULL*/) { // enter the mutex here to avoid concurrency problems #ifndef ASSIMP_BUILD_SINGLETHREADED std::lock_guard lock(loggerMutex); #endif if ( m_pLogger && !isNullLogger() ) { delete m_pLogger; } m_pLogger = new DefaultLogger( severity ); // Attach default log streams // Stream the log to the MSVC debugger? if ( defStreams & aiDefaultLogStream_DEBUGGER ) { m_pLogger->attachStream( LogStream::createDefaultStream( aiDefaultLogStream_DEBUGGER ) ); } // Stream the log to COUT? if ( defStreams & aiDefaultLogStream_STDOUT ) { m_pLogger->attachStream( LogStream::createDefaultStream( aiDefaultLogStream_STDOUT ) ); } // Stream the log to CERR? if ( defStreams & aiDefaultLogStream_STDERR ) { m_pLogger->attachStream( LogStream::createDefaultStream( aiDefaultLogStream_STDERR ) ); } // Stream the log to a file if ( defStreams & aiDefaultLogStream_FILE && name && *name ) { m_pLogger->attachStream( LogStream::createDefaultStream( aiDefaultLogStream_FILE, name, io ) ); } return m_pLogger; } // ---------------------------------------------------------------------------------- void Logger::debug(const char* message) { // SECURITY FIX: otherwise it's easy to produce overruns since // sometimes importers will include data from the input file // (i.e. node names) in their messages. if (strlen(message)>MAX_LOG_MESSAGE_LENGTH) { return; } return OnDebug(message); } // ---------------------------------------------------------------------------------- void Logger::info(const char* message) { // SECURITY FIX: see above if (strlen(message)>MAX_LOG_MESSAGE_LENGTH) { return; } return OnInfo(message); } // ---------------------------------------------------------------------------------- void Logger::warn(const char* message) { // SECURITY FIX: see above if (strlen(message)>MAX_LOG_MESSAGE_LENGTH) { return; } return OnWarn(message); } // ---------------------------------------------------------------------------------- void Logger::error(const char* message) { // SECURITY FIX: see above if (strlen(message)>MAX_LOG_MESSAGE_LENGTH) { return; } return OnError(message); } // ---------------------------------------------------------------------------------- void DefaultLogger::set( Logger *logger ) { // enter the mutex here to avoid concurrency problems #ifndef ASSIMP_BUILD_SINGLETHREADED std::lock_guard lock(loggerMutex); #endif if ( nullptr == logger ) { logger = &s_pNullLogger; } if ( nullptr != m_pLogger && !isNullLogger() ) { delete m_pLogger; } DefaultLogger::m_pLogger = logger; } // ---------------------------------------------------------------------------------- bool DefaultLogger::isNullLogger() { return m_pLogger == &s_pNullLogger; } // ---------------------------------------------------------------------------------- Logger *DefaultLogger::get() { return m_pLogger; } // ---------------------------------------------------------------------------------- // Kills the only instance void DefaultLogger::kill() { // enter the mutex here to avoid concurrency problems #ifndef ASSIMP_BUILD_SINGLETHREADED std::lock_guard lock(loggerMutex); #endif if ( m_pLogger == &s_pNullLogger ) { return; } delete m_pLogger; m_pLogger = &s_pNullLogger; } // ---------------------------------------------------------------------------------- // Debug message void DefaultLogger::OnDebug( const char* message ) { if ( m_Severity == Logger::NORMAL ) { return; } static const size_t Size = MAX_LOG_MESSAGE_LENGTH + 16; char msg[Size]; ai_snprintf(msg, Size, "Debug, T%u: %s", GetThreadID(), message); WriteToStreams( msg, Logger::Debugging ); } // ---------------------------------------------------------------------------------- // Logs an info void DefaultLogger::OnInfo( const char* message ){ static const size_t Size = MAX_LOG_MESSAGE_LENGTH + 16; char msg[Size]; ai_snprintf(msg, Size, "Info, T%u: %s", GetThreadID(), message ); WriteToStreams( msg , Logger::Info ); } // ---------------------------------------------------------------------------------- // Logs a warning void DefaultLogger::OnWarn( const char* message ) { static const size_t Size = MAX_LOG_MESSAGE_LENGTH + 16; char msg[Size]; ai_snprintf(msg, Size, "Warn, T%u: %s", GetThreadID(), message ); WriteToStreams( msg, Logger::Warn ); } // ---------------------------------------------------------------------------------- // Logs an error void DefaultLogger::OnError( const char* message ) { static const size_t Size = MAX_LOG_MESSAGE_LENGTH + 16; char msg[ Size ]; ai_snprintf(msg, Size, "Error, T%u: %s", GetThreadID(), message ); WriteToStreams( msg, Logger::Err ); } // ---------------------------------------------------------------------------------- // Will attach a new stream bool DefaultLogger::attachStream( LogStream *pStream, unsigned int severity ) { if ( nullptr == pStream ) { return false; } if (0 == severity) { severity = Logger::Info | Logger::Err | Logger::Warn | Logger::Debugging; } for ( StreamIt it = m_StreamArray.begin(); it != m_StreamArray.end(); ++it ) { if ( (*it)->m_pStream == pStream ) { (*it)->m_uiErrorSeverity |= severity; return true; } } LogStreamInfo *pInfo = new LogStreamInfo( severity, pStream ); m_StreamArray.push_back( pInfo ); return true; } // ---------------------------------------------------------------------------------- // Detach a stream bool DefaultLogger::detatchStream( LogStream *pStream, unsigned int severity ) { if ( nullptr == pStream ) { return false; } if (0 == severity) { severity = SeverityAll; } bool res( false ); for ( StreamIt it = m_StreamArray.begin(); it != m_StreamArray.end(); ++it ) { if ( (*it)->m_pStream == pStream ) { (*it)->m_uiErrorSeverity &= ~severity; if ( (*it)->m_uiErrorSeverity == 0 ) { // don't delete the underlying stream 'cause the caller gains ownership again (**it).m_pStream = nullptr; delete *it; m_StreamArray.erase( it ); res = true; break; } return true; } } return res; } // ---------------------------------------------------------------------------------- // Constructor DefaultLogger::DefaultLogger(LogSeverity severity) : Logger ( severity ) , noRepeatMsg (false) , lastLen( 0 ) { lastMsg[0] = '\0'; } // ---------------------------------------------------------------------------------- // Destructor DefaultLogger::~DefaultLogger() { for ( StreamIt it = m_StreamArray.begin(); it != m_StreamArray.end(); ++it ) { // also frees the underlying stream, we are its owner. delete *it; } } // ---------------------------------------------------------------------------------- // Writes message to stream void DefaultLogger::WriteToStreams(const char *message, ErrorSeverity ErrorSev ) { ai_assert(nullptr != message); // Check whether this is a repeated message if (! ::strncmp( message,lastMsg, lastLen-1)) { if (!noRepeatMsg) { noRepeatMsg = true; message = "Skipping one or more lines with the same contents\n"; } else return; } else { // append a new-line character to the message to be printed lastLen = ::strlen(message); ::memcpy(lastMsg,message,lastLen+1); ::strcat(lastMsg+lastLen,"\n"); message = lastMsg; noRepeatMsg = false; ++lastLen; } for ( ConstStreamIt it = m_StreamArray.begin(); it != m_StreamArray.end(); ++it) { if ( ErrorSev & (*it)->m_uiErrorSeverity ) (*it)->m_pStream->write( message); } } // ---------------------------------------------------------------------------------- // Returns thread id, if not supported only a zero will be returned. unsigned int DefaultLogger::GetThreadID() { // fixme: we can get this value via std::threads // std::this_thread::get_id().hash() returns a (big) size_t, not sure if this is useful in this case. #ifdef WIN32 return (unsigned int)::GetCurrentThreadId(); #else return 0; // not supported #endif } // ---------------------------------------------------------------------------------- } // !namespace Assimp