HA

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4 bytes contain a [[CRC-32]] redundancy check.
 
4 bytes contain a [[CRC-32]] redundancy check.
  
4 bytes contain the file timestamp.
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4 bytes contain the file date and time (unix timestamp).
  
 
Next is the file pathname, null-terminated, then the filename, also null-terminated.
 
Next is the file pathname, null-terminated, then the filename, also null-terminated.
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== Software ==
 
== Software ==
 
* {{CdTextfiles|swextrav4/swextrav4-3/arch/ha098.zip|HA 0.98}} (1993-01) - DOS binary
 
* {{CdTextfiles|swextrav4/swextrav4-3/arch/ha098.zip|HA 0.98}} (1993-01) - DOS binary
* [https://www.sac.sk/download/pack/ha0999.zip HA 0.999 beta] (1995-01) - DOS binary + source code (in a HA file)
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* [https://www.sac.sk/download/pack/ha0999.zip HA 0.999 beta] (1995-01) - DOS binary   source code (in a HA file)
 
* [https://ftp.openbsd.org/pub/OpenBSD/distfiles/ha0999.tgz ha0999.tgz] - Unix port
 
* [https://ftp.openbsd.org/pub/OpenBSD/distfiles/ha0999.tgz ha0999.tgz] - Unix port
 
* [https://ibiblio.org/pub/linux/utils/compress/ha0999p-linux.tar.gz ha0999p-linux.tar.gz] - An early Linux port
 
* [https://ibiblio.org/pub/linux/utils/compress/ha0999p-linux.tar.gz ha0999p-linux.tar.gz] - An early Linux port
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== Sample files ==
 
== Sample files ==
* https://telparia.com/fileFormatSamples/archive/ha/
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* {{DexvertSamples|archive/ha}}
  
 
== Links ==
 
== Links ==

Latest revision as of 02:55, 28 December 2023

File Format
Name HA
Ontology
Extension(s) .ha
Released 1993

HA is an archiver originally developed by Harri Hirvola for the (PC/MS) DOS platform, and later ported to Unix/Linux. It uses a compression method called HSC which is reportedly protected by patent, but since the pages mentioning this status are from as far back as 1995, the patent is likely to be expired by now.

Contents

[edit] Format info

All multi-byte numeric quantities are little-endian.

The file header starts with "HA" (as ASCII characters).

The next two bytes give the number of files in the archive.

What follows is the header then contents of each file.

Each file header starts with a single byte indicating version (in the upper 4 bits) and compression type (in the lower 4 bits): 0=CPY, 1=ASC, 2=HSC, E=DIR, F=Special

Then 4 bytes comprise the compressed length, and 4 bytes comprise the uncompressed (original) length.

4 bytes contain a CRC-32 redundancy check.

4 bytes contain the file date and time (unix timestamp).

Next is the file pathname, null-terminated, then the filename, also null-terminated.

One byte after that gives the length of the machine-specific information, followed by the bytes comprising this information, with the first byte specifying the information type.

[edit] Specifications

[edit] Software

[edit] Sample files

[edit] Links

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