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110 lines
2.4 KiB
110 lines
2.4 KiB
4 years ago
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#include "libplatform/impl.h"
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namespace mp4v2 { namespace platform { namespace io {
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///////////////////////////////////////////////////////////////////////////////
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class StandardFileProvider : public FileProvider
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{
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public:
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StandardFileProvider();
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bool open( std::string name, Mode mode );
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bool seek( Size pos );
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bool read( void* buffer, Size size, Size& nin, Size maxChunkSize );
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bool write( const void* buffer, Size size, Size& nout, Size maxChunkSize );
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bool close();
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private:
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bool _seekg;
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bool _seekp;
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std::fstream _fstream;
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};
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///////////////////////////////////////////////////////////////////////////////
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StandardFileProvider::StandardFileProvider()
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: _seekg ( false )
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, _seekp ( false )
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{
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}
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bool
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StandardFileProvider::open( std::string name, Mode mode )
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{
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ios::openmode om = ios::binary;
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switch( mode ) {
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case MODE_UNDEFINED:
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case MODE_READ:
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default:
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om |= ios::in;
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_seekg = true;
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_seekp = false;
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break;
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case MODE_MODIFY:
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om |= ios::in | ios::out;
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_seekg = true;
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_seekp = true;
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break;
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case MODE_CREATE:
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om |= ios::in | ios::out | ios::trunc;
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_seekg = true;
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_seekp = true;
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break;
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}
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_fstream.open( name.c_str(), om );
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return _fstream.fail();
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}
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bool
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StandardFileProvider::seek( Size pos )
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{
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if( _seekg )
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_fstream.seekg( pos, ios::beg );
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if( _seekp )
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_fstream.seekp( pos, ios::beg );
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return _fstream.fail();
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}
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bool
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StandardFileProvider::read( void* buffer, Size size, Size& nin, Size maxChunkSize )
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{
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_fstream.read( (char*)buffer, size );
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if( _fstream.fail() )
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return true;
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nin = _fstream.gcount();
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return false;
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}
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bool
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StandardFileProvider::write( const void* buffer, Size size, Size& nout, Size maxChunkSize )
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{
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_fstream.write( (const char*)buffer, size );
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if( _fstream.fail() )
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return true;
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nout = size;
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return false;
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}
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bool
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StandardFileProvider::close()
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{
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_fstream.close();
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return _fstream.fail();
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}
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///////////////////////////////////////////////////////////////////////////////
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FileProvider&
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FileProvider::standard()
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{
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return *new StandardFileProvider();
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}
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///////////////////////////////////////////////////////////////////////////////
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}}} // namespace mp4v2::platform::io
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