ifnd	LIBRARIES_COMPRESS_I
LIBRARIES_COMPRESS_I	equ	1

	ifnd	UTILITY_TAGITEM_I
	include "utility/tagitem.i"
	endc

CS_Tags	equ	TAG_USER+'CI'

* Tags for CompInfo() *
CS_ProgramName	equ	(CS_Tags+1)	; Name of program/implementation
CS_AuthorName	equ	(CS_Tags+2)	; Name of author
CS_AlgoName	equ	(CS_Tags+3)	; Name of compression algorithm
CS_CompSpeed	equ	(CS_Tags+4)	; Approximate compression speed (CPS)
CS_DecompSpeed	equ	(CS_Tags+5)	; Approximate decompression speed
CS_AsyncComp	equ	(CS_Tags+6)	; Asynchronous compression supported
CS_AsyncDecomp	equ	(CS_Tags+7)	; Asynchronous decompression supported
CS_BlockComp	equ	(CS_Tags+8)	; Multiblock compression supported
CS_BlockDecomp	equ	(CS_Tags+9)	; Multiblock decompression supported

* Tags for Compress() and Decompress() *
CS_InputBuffer	equ	(CS_Tags+1)	; Pointer to data to compress (required)
CS_InputSize	equ	(CS_Tags+2)	; Size of input data (required)
CS_OutputBuffer	equ	(CS_Tags+3)	; Pointer to output buffer (required)
CS_IOHook	equ	(CS_Tags+4)	; Hook for blocked data I/O (alternate)
CS_AsyncMsg	equ	(CS_Tags+5)	; Message to reply when call finished

* Algorithm-specific tags for Compress() and Decompress() *
CS_LZMaxBits	equ	(CS_Tags+100)	; Max bits of compression for LZ algorithms

* Message passed to programs through the IOHook *
 STRUCTURE	CompressIOMsg,0
	LONG	ciom_Command		; Defined below
	APTR	ciom_BlockPtr		; Next data block (filled by caller)
	LONG	ciom_BlockSize		; Size of data block (filled by caller)
	LABEL	ciom_SIZEOF

CIOMC_NEXTSOURCE	equ	1	; Get next block of source
CIOMC_NEXTDEST		equ	2	; Get next destination block

* Error codes returned by Compress() and Decompress() *
CSERR_NOMEMORY		equ	-1	; Not enough memory
CSERR_INCOMPATIBLE	equ	-2	; Wrong algorithm
CSERR_NOCOMPRESSION	equ	-3	; Would get 0% or worse compression
CSERR_CORRUPT		equ	-4	; Corrupt compressed input data
CSERR_NOHARDWARE	equ	-5	; Required hardware missing
CSERR_HARDFAIL		equ	-6	; Hardware failure
CSERR_BADPARAMS		equ	-7	; Bad parameters to comp/decomp call

* Library functions *
	LIBINIT
	LIBDEF	_LVOCompressInfo
	LIBDEF	_LVOCompress
	LIBDEF	_LVODecompress
	LIBDEF	_LVOCompressStart
	LIBDEF	_LVODecompressStart
	LIBDEF	_LVOCompressCheck
	LIBDEF	_LVOCompressEnd

	endc