Function SzExtractFile

source/gcunzip.cpp:493–529

***************************************************************************/

size_t SzExtractFile(int i, unsigned char *buffer)
{
	// prepare some variables
	SzBlockIndex = 0xFFFFFFFF;
	SzOffset = 0;

	// Unzip the file

	SzRes = SzExtract2(
		&SzArchiveStream.InStream,
		&SzDb,
		i,                      // index of file
		&SzBlockIndex,          // index of solid block
		&buffer,
		&SzBufferSize,
		&SzOffset,              // offset of stream for required file in *outBuffer
		&SzOutSizeProcessed,    // size of file in *outBuffer
		&SzAllocImp,
		&SzAllocTempImp);

	// close 7Zip archive and free memory
	SzClose();

	CancelAction();

	// check for errors
	if(SzRes != SZ_OK)
	{
		// display error message
		SzDisplayError(SzRes);
		return 0;
	}
	else
	{
		return SzOutSizeProcessed;
	}
}