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 TPLZH 0.26 - Huffman Compression Engine  Andres Cvitkovich 05.08.1993

Базовый модуль для сжатия и распаковки по методу Хаффмана. Прилагается LZO.PAS - ООП интерфейс для модуля LZH.PAS.
Huffman Compression Engine (V0.26) w/TP interface for Atari ST/TT, IBM. Included LZO.PAS - object-oriented interface for LZH.PAS



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Requestable from : Joe Jared of 1:125/1212@Fidonet.ORG BBS (510) 834-6906 V.32bis/HST 8n1 (European Guard tones enabled) File request name : TPLZH (Magic names only please) Discription : (V0.26) Huffman Compression Engine w/TP {$O+} : interface. Atari ST/TT, and IBM. Downloadable name : TPLZH@##.zip where @ is the major release number and the minor release. Topics: - What's new - How to use this utility in your programs - Legalities and distribution limitations - Version history: Refer to TPLZH.HST --------------------------------------------------------------------- V0.26 (TPLZH026.Zip) Bug fix for wild write in DS memory (IBM version) Abandoned TP 5.5 compatibility --------------------------------------------------------------------- - Implementation: (IBM) The following is a basic structure of how the engine operates: ( Your program ) ------------\ | \---( Your program ) | +-->(Your procedure for handling input buffer) | | (These must be far procedures) | |+->(Your procedure for handling output buffer) v || (Huffman Compression Engine) It's generally a good idea to have some sort of display related function in each of your iobuffer routines, and especially during initial setup. In the examples, position progress reports keep the user from being bored. Memory requirements: Memory requirements are as follows: {$M Stack, Minheap, Maxheap} {$M 1024, 56000, 56000} (Lzhasm.obj) Note: This does not include sample program space. Codespace: 3693 bytes. Dataspace: 12 bytes The stack is probably higher than necessary, but heap memory is definately accurate. (Some space is currently reserved for updates so there are no hassles Approximately 700 bytes) This unit is overlayable, and is designed to operate best when overlayed. (With minimum usage of data seg, it makes sense to overlay the engine, because its entire process can be contained in an overlay.) -------------------------------------------------------------------- -Legalities: -Compression of this archive: As far as compression type is concerned, I could personally care less, as long as the software used to re-compress is freely available. Please to not re-compress this archive with crippleware, and do not add useless banner files. The contents of this archive should contain the following: + means compatible with language v x.xx and higher. .model small,pascal LZHASM.OBJ -=> The huffman compression object file (MSC 5.1+) TPLZH.HST -=> Version history TPLZH.DOC -=> This document. LZ.PAS -=> Sample TP 6.0+ version LZH.PAS -=> Base unit for all pascal platforms LZO.PAS -=> OOPS examples for TP 6.0+ TESTLZO.PAS -=> OOPS examples for TP 6.0+ LZ.exe -=> Compiled Lz.pas using Turbo Pascal 7.0 Anything additional shall be considered twit behavior. If this object is used in any utility you write for public or commercial use, please give credit to the following people in your documentation or credits banner (as applicable): (These people always) Haruyasu YOSHIZAKI : Original lharc program. Kenji RIKITAKE : English translation to C Peter Sawatzki : Pascal interface(TP 5.0+} Wayne Sullivan : Pascal interface(TP 5.0+) Joe Jared : Assembler optimization {TP 5.0+} : Assembler routines for 680x0 machines. (These people as appropriate) Andres Cvitkovich : Object Oriented version (TP 5.5+) -Distribution No fee may be charged for distribution of this package, and it CANNOT be sold for any reason. All code is property of the developers listed. Exceptions: The disk this program is on, may be sold for the cost of the disk. (Not to exceed $0.70)+exact mail costs if mailed. CD-ROM distribution. Unrestricted, but please either download or freq the latest prior to distribution. If in a shareware or commercial package, no additional charges may be added for the use of this "module". This is a * militantly freeware * implementation of huffman compression.