BufferRef loadStreamBuffer( IStreamRef is )
{
// prevent crash if stream is not valid
if( ! is )
throw StreamExc();
off_t fileSize = is->size();
if( fileSize > std::numeric_limits<off_t>::max() )
throw StreamExcOutOfMemory();
if( fileSize ) { // sometimes fileSize will be zero for a stream that doesn't know how big it is
auto result = std::make_shared<Buffer>( fileSize );
is->readDataAvailable( result->getData(), fileSize );
return result;
}
else {
const size_t bufferSize = 4096;
size_t offset = 0;
auto result = std::make_shared<Buffer>( bufferSize );
while( ! is->isEof() ) {
if( offset + bufferSize > result->getAllocatedSize() )
result->resize( std::max( (size_t)( result->getAllocatedSize() * 1.5f ), offset + bufferSize ) );
size_t bytesRead = is->readDataAvailable( reinterpret_cast<uint8_t*>( result->getData() ) + offset, bufferSize );
offset += bytesRead;
result->setSize( offset );
}
return result;
}
}
void loadStreamMemory( IStreamRef is, std::shared_ptr<uint8_t> *resultData, size_t *resultDataSize )
{
// prevent crash if stream is not valid
if( ! is )
throw StreamExc();
off_t fileSize = is->size();
if( fileSize > std::numeric_limits<off_t>::max() )
throw StreamExcOutOfMemory();
*resultData = std::shared_ptr<uint8_t>( (uint8_t*)malloc( fileSize ), free );
if( ! (*resultData ) )
throw StreamExcOutOfMemory();
*resultDataSize = static_cast<size_t>( fileSize );
is->readDataAvailable( resultData->get(), fileSize );
}
