118 lines
4.4 KiB
C
118 lines
4.4 KiB
C
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================//
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#ifndef ZIP_UNCOMPRESSED_H
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#define ZIP_UNCOMPRESSED_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "datamap.h"
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#define PKID( a, b ) (((b)<<24)|((a)<<16)|('K'<<8)|'P')
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// compressionMethod field
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#define ZIP_COMPRESSION_NONE 0
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#define ZIP_COMPRESSION_LZMA 14
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#pragma pack(1)
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struct ZIP_EndOfCentralDirRecord
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{
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DECLARE_BYTESWAP_DATADESC();
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unsigned int signature; // 4 bytes PK56
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unsigned short numberOfThisDisk; // 2 bytes
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unsigned short numberOfTheDiskWithStartOfCentralDirectory; // 2 bytes
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unsigned short nCentralDirectoryEntries_ThisDisk; // 2 bytes
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unsigned short nCentralDirectoryEntries_Total; // 2 bytes
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unsigned int centralDirectorySize; // 4 bytes
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unsigned int startOfCentralDirOffset; // 4 bytes
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unsigned short commentLength; // 2 bytes
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// zip file comment follows
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};
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struct ZIP_FileHeader
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{
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DECLARE_BYTESWAP_DATADESC();
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unsigned int signature; // 4 bytes PK12
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unsigned short versionMadeBy; // version made by 2 bytes
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unsigned short versionNeededToExtract; // version needed to extract 2 bytes
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unsigned short flags; // general purpose bit flag 2 bytes
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unsigned short compressionMethod; // compression method 2 bytes
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unsigned short lastModifiedTime; // last mod file time 2 bytes
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unsigned short lastModifiedDate; // last mod file date 2 bytes
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unsigned int crc32; // crc-32 4 bytes
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unsigned int compressedSize; // compressed size 4 bytes
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unsigned int uncompressedSize; // uncompressed size 4 bytes
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unsigned short fileNameLength; // file name length 2 bytes
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unsigned short extraFieldLength; // extra field length 2 bytes
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unsigned short fileCommentLength; // file comment length 2 bytes
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unsigned short diskNumberStart; // disk number start 2 bytes
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unsigned short internalFileAttribs; // internal file attributes 2 bytes
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unsigned int externalFileAttribs; // external file attributes 4 bytes
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unsigned int relativeOffsetOfLocalHeader; // relative offset of local header 4 bytes
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// file name (variable size)
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// extra field (variable size)
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// file comment (variable size)
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};
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struct ZIP_LocalFileHeader
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{
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DECLARE_BYTESWAP_DATADESC();
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unsigned int signature; //local file header signature 4 bytes PK34
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unsigned short versionNeededToExtract; // version needed to extract 2 bytes
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unsigned short flags; // general purpose bit flag 2 bytes
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unsigned short compressionMethod; // compression method 2 bytes
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unsigned short lastModifiedTime; // last mod file time 2 bytes
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unsigned short lastModifiedDate; // last mod file date 2 bytes
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unsigned int crc32; // crc-32 4 bytes
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unsigned int compressedSize; // compressed size 4 bytes
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unsigned int uncompressedSize; // uncompressed size 4 bytes
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unsigned short fileNameLength; // file name length 2 bytes
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unsigned short extraFieldLength; // extra field length 2 bytes
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// file name (variable size)
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// extra field (variable size)
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};
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//=============================================================================//
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// Valve Non standard Extension, Preload Section
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// An optional first file in an aligned zip that can be loaded into ram and
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// used by the FileSystem to supply header data rather than disk.
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// Is is an optimization to prevent the large of amount of small I/O performed
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/// by the map loading process.
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//=============================================================================//
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#define PRELOAD_SECTION_NAME "__preload_section.pre"
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#define PRELOAD_HDR_VERSION 3
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#define XZIP_COMMENT_LENGTH 32
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#define INVALID_PRELOAD_ENTRY ( (unsigned short)-1 )
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struct ZIP_PreloadHeader
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{
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DECLARE_BYTESWAP_DATADESC();
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unsigned int Version; // VERSION
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unsigned int DirectoryEntries; // Number of zip directory entries.
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unsigned int PreloadDirectoryEntries; // Number of preloaded directory entries (equal or less than the zip dir).
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unsigned int Alignment; // File alignment of the zip
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};
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struct ZIP_PreloadDirectoryEntry
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{
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DECLARE_BYTESWAP_DATADESC();
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unsigned int Length; // Length of the file's preload data in bytes
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unsigned int DataOffset; // Offset the file data in the .zip, relative to the logical beginning of the preload file.
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};
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struct ZIP_PreloadRemapTable
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{
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DECLARE_BYTESWAP_DATADESC();
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unsigned short PreloadIndex; // Index into preload directory, entry marked invalid if no preload entry present
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};
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#pragma pack()
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#endif // ZIP_UNCOMPRESSED_H
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