brp_VHL_GetFileInfo()

brp_errcode brp_VHL_GetFileInfo	(	brp_protocol	protocol,
		unsigned	Id,
		unsigned *	Len,
		unsigned *	BlockSize
	)

This command returns the available size of the VHL-file whose ID is specified by the ID parameter. Two values are returned: the length of the VHL-file (Len) and the size of a single block (BlockSize).

The size of the returned value Len indicates the maximum number of bytes which can be read/written with theVHL.Read orVHL.Write commands. Attempting to read or write a larger amount of Bytes withVHL.Read orVHL.Write will generate an error status code (VHL.ErrRead orVHL.ErrWrite ).

If the card system organizes its memory in blocks, BlockSize returns the size of a single block. If the memory is not organized in blocks, 1 will be returned. 0 will be returned if the block sizes are not unique (currently, there is no such card system in existence).

This command can only be executed if a card is selected, e.g. with a previous call ofVHL.Select .

The returned VHL-file size corresponds to the reader's configuration values. It does not necessarily guarantee that a file of the returned sized can be read on the card. In some cases, the actual size of the card may be smaller than the returned VHL-file size.

Parameters

[in]	protocol	used to execute the command
[in]	Id	ID of VHL-file in configuration memory (starting at 0). To keep your application ConfigEditor compatible do not hardcode this ID in your application, but resolve it from a name viaVHL.ResolveFilename .
[out]	Len	Size of VHL-file in bytes.
[out]	BlockSize	Size of a single block.