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Amiga MA Magazine 1998 #6
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amigamamagazinepolishissue1998.iso
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packery
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xpk_source
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libraries
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fast
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xpkfast.a
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1996-10-19
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INCLUDE AINCLUDE:IncDirs.i *sets all includedirs, needed for my ASM
INCDIR PrC:projekte/xpkmaster/xpk_private
INCLUDE FAST/xpkLibFAST.i
include "xpk/xpk.i"
include "xpk/xpksub.i"
INCLUDE exec/memory.i
INCLUDE FAST/compress.a
INCLUDE FAST/compress2.a
INCLUDE FAST/decompress.a
; XREF compress_fast
; XREF compress_slow
; XREF decompress
PACKMEM_FAST equ $10000
PACKMEM_SLOW equ $44000
UNPACKMEM equ 0
_XpksPackChunk:
movem.l a0-a6/d1,-(a7)
move.l a6,a5 ; lib base
move.l a0,a4 ; xparams
move.l xsp_Mode(a4),d1
move.l #PACKMEM_FAST,d0
lea.l compress_fast(pc),a3
cmp.l #80,d1
bcs.s IsFast
move.l #PACKMEM_SLOW,d0
lea.l compress_slow(pc),a3
IsFast:
tst.l xsp_Sub(a4) ;Is there some memory allocated?
beq.s AllocPackMem
cmp.l xsp_Sub+4(a4),d0 ; Is the size right?
beq.s packMemOK
bsr.s _XpksPackFree ; Free currently allocated memory.
AllocPackMem:
move.l d0,xsp_Sub+4(a4)
move.l #MEMF_PUBLIC,d1
move.l 4.W,a6
JSR _LVOAllocMem(A6)
move.l d0,xsp_Sub(a4)
bne.s packMemOK
move.l #XPKERR_NOMEM,d0
bra.s endPackChunk
packMemOK:
move.l xsp_InBuf(a4),a0 ;a0:=InBuf
move.l xsp_OutBuf(a4),a1 ;a1:=OutBuf
move.l xsp_Sub(a4),a2 ;a2:=Hash
move.l xsp_InLen(a4),d0 ;d0:=InLen
moveq.l #90,d1
jsr (a3) ; call the compressor.
tst.l d0
bne.s Nooverrun
moveq.l #XPKERR_EXPANSION,d0
bra.s endPackChunk
Nooverrun:
move.l d0,xsp_OutLen(a4) ;Fill in Final output length XpkSubParams
moveq #XPKERR_OK,d0
endPackChunk:
movem.l (sp)+,a0-a6/d1
rts
_XpksPackFree: movem.l a0-a2/a6/d0-d1,-(a7)
move.l xsp_Sub(a0),a1
beq.s packFreeEnd
clr.l xsp_Sub(a0)
move.l xsp_Sub+4(a0),d0 ; currently allocated amount.
clr.l xsp_Sub+4(a0)
move.l 4.W,a6
JSR _LVOFreeMem(A6)
packFreeEnd: movem.l (a7)+,a0-a2/a6/d0-d1
moveq #XPKERR_OK,d0
rts
_XpksUnpackChunk:
move.l a1,-(sp)
move.l xsp_OutBuf(a0),a1
move.l xsp_InLen(a0),d0
move.l xsp_InBuf(a0),a0
bsr decompress
move.l (sp)+,a1
moveq.l #XPKERR_OK,d0
rts
_XpksPackerInfo:
move.l a0,d0
lea FastInfo(pc),a0
exg a0,d0
rts
; --- Static Data --------
FastInfo:
dc.w 1 ;xi_XpkInfoVersion:Version number of this structure
dc.w VERSION ;xi_LibVersion : The version of this sublibrary
dc.w 2 ;xi_MasterVersion: The required master lib version
dc.w 0 ;xi_ModesVersion : Longword align
dc.l FastName ;xi_Name : Brief name of the packer
dc.l LongName ;xi_LongName : Full name of the packer
dc.l Description ;xi_Description : One line description of packer
dc.b 'FAST' ;xi_ID : ID the packer goes by (XPK format)
;xi_Flags : Defined below
dc.l XPKIF_PK_CHUNK|XPKIF_UP_CHUNK|XPKIF_MODES
dc.l $7FFFFFFF ;xi_MaxPkInChunk : Max input chunk size for packing
dc.l 0 ;xi_MinPkInChunk : Min input chunk size for packing
dc.l $10000 ;xi_DefPkInChunk : Default packing chunk size
dc.l PackMsg ;xi_PackMsg : Packing message, present tense
dc.l UnpackMsg ;xi_UnpackMsg : Unpacking message, present tense
dc.l PackedMsg ;xi_PackedMsg : Packing message, past tense
dc.l UnpackedMsg ;xi_UnpackedMsg : Unpacking message, past tense
dc.w 50 ;xi_DefMode : Default mode number
dc.w 0 ;xi_Pad : for future use
dc.l Modes ;xi_Modes : Array of compression modes
dc.l 0,0,0,0,0,0 ;xi_Reserved,6*4 : Future expansion - set to zero
FastName: dc.b 'fasTcinator',0
LongName: dc.b 'FAST alias WOOP or LZRW++',0
Description: dc.b 'LZ77-family, windowsize: 4095, no quotecount, 2 streams',0
PackMsg: dc.b 'tieing',0
PackedMsg: dc.b 'compressed',0
UnpackMsg: dc.b 'untieing',0
UnpackedMsg: dc.b 'decompressed',0
EVEN
Modes:
dc.l Crawling ;xm_Next : Chain to next descriptor for ModeDesc list
dc.l 79 ;xm_Upto : Maximum efficiency handled by this mode.
;xm_Flags : Defined below
dc.l XPKMF_A3000SPEED
dc.l PACKMEM_FAST ;xm_PackMemory : Extra memory required during packing
dc.l UNPACKMEM ;xm_UnpackMemory : Extra memory during unpacking
dc.l 428 ;xm_PackSpeed : Approx packing speed in K per second
dc.l 1055 ;xm_UnpackSpeed : Approx unpacking speed in K per second
dc.w 327 ;xm_Ratio : CF in 0.1% for AmigaVision executable
dc.w 0 ;xm_ChunkSize : Desired chunk size in K (!!) for this mode
dc.b 'speedy',0,0,0,0 ;xm_Description,10:8 character mode description
Crawling:
dc.l 0 ;xm_Next : Chain to next descriptor for ModeDesc list
dc.l 100 ;xm_Upto : Maximum efficiency handled by this mode.
;xm_Flags : Defined below
dc.l XPKMF_A3000SPEED
dc.l PACKMEM_SLOW ;xm_PackMemory : Extra memory required during packing
dc.l UNPACKMEM ;xm_UnpackMemory : Extra memory during unpacking
dc.l 70 ;xm_PackSpeed : Approx packing speed in K per second
dc.l 1096 ;xm_UnpackSpeed : Approx unpacking speed in K per second
dc.w 393 ;xm_Ratio : CF in 0.1% for AmigaVision executable
dc.w 0 ;xm_ChunkSize : Desired chunk size in K (!!) for this mode
dc.b 'crawling',0,0 ;xm_Description,10:8 character mode description
END