On The Rain-Slick Precipice of Darkness

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HHA

Format Type: Archive
Endian Order: Little Endian
Date Posted: 2.6.2008

Format Specifications

File Header char {4} - ID: 0x4f 0xf3 0x2f 0xac uint16 {1} - Purpose unknown; always 0 uint16 {1} - Purpose unknown; always 1 uint32 {1} - Size of the string table in bytes. Always a multiple of 16. uint32 {1} - Number of files in the archive.

File Name Table char{X} - A list of null terminated strings of varying lengths representing directory and file names.

File Index Table The index follows immediately after the file name table, so it is located at offset 16 + X where X is the size of the file name table. // For each file

uint32 {1} - Offset from start of name table to directory name. uint32 {1} - Pointer to file name in the file name table. (Add 16 to this value to obtain an offset from the start of the file). uint32 {1} - Compression. 0 = uncompressed 1 = deflate 2 = LZMA. uint32 {1} - Absolute offset to the file data. Always a multiple of 16. uint32 {1} - Uncompressed file size. uint32 {1} - Compressed (stored) file size (excluding padding).

byte {X} - File data

Notes and Comments

This is specification for common.hha and parpg.hha.

LZMA compressed files have 5 byte property data, but omit the (8 byte) original file size. The compresses data is terminated by an LZMA end-of-stream marker.

Thanks to Soultaker on the playgreenhouse.com forums for reversing the compression.