Method AddPrefix

shadercompiler/CachingIncludeHandler.cpp:178–222

}

std::optional<CachingIncludeHandler::IncludedFile> CachingIncludeHandler::AddPrefix( const char* fileName, const char* prefix )
{
	std::lock_guard scope( m_cs );

	std::string fullPath;
	if( PathIsRelative( fileName ) )
	{
		if( auto joined = JoinPath( "", fileName ) )
		{
			fullPath = *joined;
		}
		else
		{
			return std::nullopt;
		}
	}
	else
	{
		fullPath = fileName;
	}
	FileFromPath::iterator fileFromPath = m_fileFromPath.find( fullPath );
	if( fileFromPath == m_fileFromPath.end() )
	{
		return std::nullopt;
	}

	auto& info = fileFromPath->second;
	auto length = strlen( prefix );
	auto data = malloc( info.size + length + 2 );
	if( data == NULL )
	{
		return std::nullopt;
	}
	*static_cast<char*>( data ) = '\n';
	memcpy( static_cast<char*>( data ) + 1, prefix, length );
	memcpy( static_cast<char*>( data ) + 1 + length, info.data, info.size + 1 );
	info.size += length;

	m_pathFromFile[data] = m_pathFromFile[info.data - 1];
	m_pathFromFile.erase( info.data - 1 );
	free( (void*)( info.data - 1 ) );
	info.data = static_cast<const char*>( data ) + 1;

	return info;
}

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// Description: