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#Starcraft brood war iso data archive
#Starcraft brood war iso data verification
#Starcraft brood war iso data code

Warcraft III cinematicsĬutscene cinematics with the MPQ extension are included with Warcraft III and, despite the file extension, are not actual MPQ files.

#Starcraft brood war iso data archive

Since there was only one compression algorithm available when MPQs were first deployed in Diablo, those archives used a different archive file metadata flag to indicate compression and did not use a compression header byte. bzip2 (introduced in World of Warcraft).Latter algorithm is lossy and only suitable for raw PCM input data. Huffman tree compression combined with ADPCM 4:1 compression (both introduced in StarCraft).The first compression algorithm available. The following algorithms are currently in use by Blizzard games: The order in which those compressors are applied is hardcoded. A header byte is prepended to every compressed sector to indicate which compressions were used. In modern MPQ archives, each segment (or sector) of a file can be compressed using a combination of compression algorithms. Currently known attributes are file creation date, CRC32 checksum and MD5 checksum. (attributes): Contains extended file metadata.

(signature): Contains the weak cryptographic signature of the archive.

(listfile): Contains a list of the archive's files, one filename per line.

Instead, the convention is to use regular files whose filename is enclosed by parentheses. MPQ archives do not have specific structures to store metadata beyond what is absolutely necessary to access archived files.

Version 2 added an extended header to the format which contained data for an extended block table to allow for larger archive sizes.

Version 1 was used before World of Warcraft.

mpq compliant files it loads and assumes all are version 1. Warcraft III ignores format version data of.

The file header reserves space to contain format version data. The encryption process which is used by default uses a known algorithm. Encryptionīoth the block table (which contains information on where the file data is located in the archive) and the hash table used for file indexing are encrypted when stored. The end of a colliding hash cluster is detected either by encountering an empty hash table entry or by traversing the entire hash table (including the modulo loopback) back to the initial hash table index.

#Starcraft brood war iso data code

In order to identify the exact entry for the requested file within a colliding hash cluster, each hash table entry stores 2 additional hashes of the lowercased filename, each using the same hashing algorithm but with a different seed value, as well as a locale code and platform code. If multiple files within the archive have the same hash, colliding entries will follow each other in increasing index order (forming a colliding hash cluster).

#Starcraft brood war iso data verification

The index of a specific file within the hash table is the hash of the lowercased filename modulo the size of the hash table, allowing for quick verification of a file's existence within the archive. In order to meet the requirements of speed generally demanded by a computer game, files are indexed in a hash table using a quick, low-collision hashing algorithm.