Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

117 lines
4.4 KiB

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