LZHUF - Revision history

Jsummers at 11:33, 13 April 2026

2026-04-13T11:33:55Z

Jsummers at 13:15, 27 February 2025

2025-02-27T13:15:40Z

Jsummers: /* Related formats */

2021-10-02T13:44:49Z

‎Related formats

Jsummers: /* Related formats */

2021-09-12T14:52:28Z

‎Related formats

Jsummers: /* Software */

2021-08-19T20:25:31Z

‎Software

Jsummers: Converted redirect to an article

2021-08-11T17:53:16Z

Converted redirect to an article

Jsummers: Redirected page to LZ77 with Huffman coding

2020-09-12T11:51:22Z

Redirected page to LZ77 with Huffman coding

New page

#REDIRECT [[LZ77 with Huffman coding]]

← Older revision		Revision as of 11:33, 13 April 2026
Line 9:		Line 9:

	It uses [[LZSS]]-flavored [[LZ77]], combined with [[adaptive Huffman coding]]. It has a 4K history buffer. The LZ77 code is from Okumura's [[LZARI]].		It uses [[LZSS]]-flavored [[LZ77]], combined with [[adaptive Huffman coding]]. It has a 4K history buffer. The LZ77 code is from Okumura's [[LZARI]].
		+
		+	The compression is the same as the [[LHA\|LHarc]]'s "lh1" scheme.

	== Format details ==		== Format details ==

@@ Line 11: / Line 11: @@
 == Format details ==
-Files have a minimal header, containing the uncompressed file size. The format is not portable, because it differs depending on the compiler's in-memory format of the "long" data type.
+Files have a minimal header, containing the uncompressed file size. The format is arguably not portable, because it differs depending on the compiler's in-memory format of the "long" data type. However, some binaries exist that assume the header is 4 bytes, little-endian.
 == Related formats ==
@@ Line 31: / Line 31: @@
 For a discussion of the terms of use, see [http://www.svgalib.org/rus/lbrate.html lbrate] → lzhuf-post.txt.
-* {{CdTextfilesURL|powerprogramming/PROGTOOL/COMPRESS/LZHSRC10.ZIP}} → LZHUF.C - "English version 1.0 /  Based on Japanese version 29-NOV-1988 / LZSS coded by Haruhiko OKUMURA / Adaptive Huffman Coding coded by Haruyasu YOSHIZAKI / Edited and translated to English by Kenji RIKITAKE"
+* LZHUF
-* {{CdTextfilesURL|rbbsv3n1/pac4/okumura.zip}} → LZHUF.C - "written by Haruyasu Yoshizaki 11/20/1988 / some minor changes 4/6/1989 / comments translated by Haruhiko Okumura 4/7/1989"
+** {{CdTextfilesURL|powerprogramming/PROGTOOL/COMPRESS/LZHSRC10.ZIP}} → LZHUF.C - "English version 1.0 /  Based on Japanese version 29-NOV-1988 / LZSS coded by Haruhiko OKUMURA / Adaptive Huffman Coding coded by Haruyasu YOSHIZAKI / Edited and translated to English by Kenji RIKITAKE"
-* {{CdTextfilesURL|pcmedic9310/UTILS/COMPRESS/OKUMURA2.ZIP}} → LZHUF.C
+** {{CdTextfilesURL|rbbsv3n1/pac4/okumura.zip}} → LZHUF.C - "written by Haruyasu Yoshizaki 11/20/1988 / some minor changes 4/6/1989 / comments translated by Haruhiko Okumura 4/7/1989"
-* {{CdTextfilesURL|simtel/simtel20/MSDOS/ARCUTILS/LZ_COMP2.ZIP}} → LZHUF.C
+** {{CdTextfilesURL|pcmedic9310/UTILS/COMPRESS/OKUMURA2.ZIP}} → LZHUF.C
-* [http://old-dos.ru/index.php?page=files&mode=files&do=show&id=3432 LHarc at old-dos.ru] → LARC and LHarc sources → LZHUF.C
+** {{CdTextfilesURL|simtel/simtel20/MSDOS/ARCUTILS/LZ_COMP2.ZIP}} → LZHUF.C
 == Links ==
 * [https://oku.edu.mie-u.ac.jp/~okumura/compression/history.html History of Data Compression in Japan]
 * {{CdTextfiles|rbbsv3n1/pac4/okumura.zip|okumura.zip}} → COMPRESS.TXT

@@ Line 22: / Line 22: @@
 * [[ARC (compression format)]] v7 "Trimmed" compression
 * [[Disk Masher System]] "Deep" compression
 == Software ==

@@ Line 20: / Line 20: @@
 * [[StuffIt]] "LZAH" compression
 * [[Freeze/Melt]]
-* [[ARC (compression format)]] v7 "Distilled" compression
+* [[ARC (compression format)]] v7 "Trimmed" compression
 * [[Disk Masher System]] "Deep" compression

@@ Line 33: / Line 33: @@
 * {{CdTextfilesURL|rbbsv3n1/pac4/okumura.zip}} → LZHUF.C - "written by Haruyasu Yoshizaki 11/20/1988 / some minor changes 4/6/1989 / comments translated by Haruhiko Okumura 4/7/1989"
 * {{CdTextfilesURL|pcmedic9310/UTILS/COMPRESS/OKUMURA2.ZIP}} → LZHUF.C
 * [http://old-dos.ru/index.php?page=files&mode=files&do=show&id=3432 LHarc at old-dos.ru] → LARC and LHarc sources → LZHUF.C

← Older revision		Revision as of 17:53, 11 August 2021
Line 1:		Line 1:
−	~~#REDIRECT~~ [[LZ77 with Huffman coding]]	+	{{FormatInfo
		+	\|formattype=electronic
		+	\|subcat=Compression
		+	\|released=1989
		+	}}
		+	:''This article is about the compression software by Haruyasu Yoshizaki. For the data compression technique in general, see [[LZ77 with Huffman coding]].''
		+
		+	'''LZHUF''', or '''LZHUF.C''', is a file compression utility written by Haruyasu Yoshizaki and Haruhiko Okumura. Some versions have a third author, Kenji Rikitake.
		+
		+	It uses [[LZSS]]-flavored [[LZ77]], combined with [[adaptive Huffman coding]]. It has a 4K history buffer. The LZ77 code is from Okumura's [[LZARI]].
		+
		+	== Format details ==
		+	Files have a minimal header, containing the uncompressed file size. The format is not portable, because it differs depending on the compiler's in-memory format of the "long" data type.
		+
		+	== Related formats ==
		+	* [[LZARI]] (predecessor)
		+	Formats that use LZHUF compression, or something very similar, include:
		+	* [[LHA\|LHarc]] "lh1" compression
		+	* [[CrLZH]]
		+	* [[StuffIt]] "LZAH" compression
		+	* [[Freeze/Melt]]
		+	* [[ARC (compression format)]] v7 "Distilled" compression
		+	* [[Disk Masher System]] "Deep" compression
		+
		+	== Software ==
		+	There are many different versions of LZHUF.C in existence, with modifications by many different people. It's not clear how many "official" versions there were, or how they ought to be identified.
		+
		+	Note that the original source code has portability issues. It will not work correctly if compiled by a modern C compiler.
		+
		+	For a discussion of the terms of use, see [http://www.svgalib.org/rus/lbrate.html lbrate] → lzhuf-post.txt.
		+
		+	* {{CdTextfilesURL\|powerprogramming/PROGTOOL/COMPRESS/LZHSRC10.ZIP}} → LZHUF.C - "English version 1.0 / Based on Japanese version 29-NOV-1988 / LZSS coded by Haruhiko OKUMURA / Adaptive Huffman Coding coded by Haruyasu YOSHIZAKI / Edited and translated to English by Kenji RIKITAKE"
		+	* {{CdTextfilesURL\|rbbsv3n1/pac4/okumura.zip}} → LZHUF.C - "written by Haruyasu Yoshizaki 11/20/1988 / some minor changes 4/6/1989 / comments translated by Haruhiko Okumura 4/7/1989"
		+	* {{CdTextfilesURL\|pcmedic9310/UTILS/COMPRESS/OKUMURA2.ZIP}} → LZHUF.C
		+	* [http://old-dos.ru/index.php?page=files&mode=files&do=show&id=3432 LHarc at old-dos.ru] → LARC and LHarc sources → LZHUF.C
		+
		+	== Links ==
		+	* [https://oku.edu.mie-u.ac.jp/~okumura/compression/history.html History of Data Compression in Japan]
		+	* {{CdTextfiles\|rbbsv3n1/pac4/okumura.zip\|okumura.zip}} → COMPRESS.TXT