Freeze/Melt - Revision history

Davidsong: /* Software */ add my freeze fork

2026-04-11T01:50:56Z

‎Software: add my freeze fork

2023-12-28T02:55:09Z

Change telparia.com samples link to template

2023-07-11T13:00:32Z

‎Software

2022-08-24T01:35:09Z

Added sample files

2021-08-20T19:26:22Z

‎Format details

2021-08-19T20:24:04Z

‎Format details

2021-01-22T19:59:02Z

‎Software

2020-09-18T14:33:45Z

2020-08-23T19:50:15Z

2020-07-10T12:14:18Z

‎Disambiguation

@@ Line 30: / Line 30: @@
 *** [https://archive.org/details/Source_Code_CD-ROM_Walnut_Creek_March_1994 Source Code CD ROM (Walnut Creek) (March 1994)]
 * [https://github.com/temisu/ancient Ancient]
 == Sample files ==

@@ Line 32: / Line 32: @@
 == Sample files ==
-* https://telparia.com/fileFormatSamples/archive/freeze/
+* {{DexvertSamples|archive/freeze}}
 == References ==

@@ Line 23: / Line 23: @@
 == Software ==
-* [http://ftp.lyx.org/pub/unix/archive/freeze-2.4.tar.Z v2.4.0 source code]
+* Freeze
-* [https://ibiblio.org/pub/linux/utils/compress/freeze-2.5.0.tar.gz v2.5.0 source code]
+** [http://ftp.lyx.org/pub/unix/archive/freeze-2.4.tar.Z v2.4.0 source code]
-* Versions 2.1–2.5 were posted to the comp.sources.misc Usenet group in 1991–1993:
+** [https://ibiblio.org/pub/linux/utils/compress/freeze-2.5.0.tar.gz v2.5.0 source code]
-** [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume17/freeze/}}], [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume25/freeze/}}], [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume26/freeze/}}]
+** Versions 2.1–2.5 were posted to the comp.sources.misc Usenet group in 1991–1993:
-** [https://archive.org/details/Source_Code_CD-ROM_Walnut_Creek_March_1994 Source Code CD ROM (Walnut Creek) (March 1994)]
+*** [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume17/freeze/}}], [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume25/freeze/}}], [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume26/freeze/}}]
 == Sample files ==

@@ Line 28: / Line 28: @@
 ** [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume17/freeze/}}], [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume25/freeze/}}], [{{CdTextfilesURL|sourcecode/usenet/compsrcs/misc/volume26/freeze/}}]
 ** [https://archive.org/details/Source_Code_CD-ROM_Walnut_Creek_March_1994 Source Code CD ROM (Walnut Creek) (March 1994)]
 == References ==

@@ Line 17: / Line 17: @@
 ''Codes'' are compressed with [[adaptive Huffman coding]]. For the newer format, ''offsets'' are decoded with the help of a static Huffman tree stored near the beginning of the file. For the older format, a predefined Huffman-like code is used.
-The adaptive Huffman format is derived [[LZHUF]].
+The adaptive Huffman format is derived from [[LZHUF]].
 == Identification ==

@@ Line 2: / Line 2: @@
 |formattype=electronic
 |subcat=Compression
-|extensions={{ext|F}}, {{ext|f}}, {{ext|lzc}}
+|extensions={{ext|F}}, {{ext|lzc}}
 |released=≤1991
 }}
@@ Line 8: / Line 8: @@
 '''Freeze''' is a file compression utility used from the command line in Unix-style operating systems. '''Melt''' is the corresponding decompressor. The format is sometimes called "'''frozen'''". It was developed by Leonid A. Broukhis. It is considered obsolete now in favor of [[gzip]].
 == Format details ==
-A two-pass compression is done with a [[Lempel-Zev]] algorithm on the first pass and a dynamic [[Huffman coding|Huffman algorithm]] on the second. The characteristics of the Huffman table used are added to the file. File attributes, ownership, etc., are preserved, and a .F extension is added. A two-byte magic number is prepended to the file (\037\236 octal for versions 1.x, and \037\237 for later versions).
+Freeze/Melt uses [[LZ77 with Huffman coding]]. The compressed data format is similar in design to that of [[LHA]]'s "lh" compression methods.
 == Software ==
@@ Line 21: / Line 31: @@
 * [http://www.esrl.noaa.gov/gmd/dv/hats/cats/stations/qnxman/freeze.html Man page] (in NOAA site, which should know something about freezing!)
 [[Category:File formats with case sensitive extensions]]

← Older revision		Revision as of 12:14, 10 July 2020
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	== Disambiguation ==		== Disambiguation ==
		+	For another format named Freeze, see [[Freeze!]].
		+
	The [[LHA\|LHarc/LHA]] software uses the terms "Freezing" and "Melting" during operation, though its format is not related.		The [[LHA\|LHarc/LHA]] software uses the terms "Freezing" and "Melting" during operation, though its format is not related.