/* This file is part of libmspack.
  * (C) 2003-2004 Stuart Caie.
  *
  * libmspack is free software; you can redistribute it and/or modify it under
  * the terms of the GNU Lesser General Public License (LGPL) version 2.1
  *
  * For further details, see the file COPYING.LIB distributed with libmspack
  */
 
 #ifndef MSPACK_CAB_H
 #define MSPACK_CAB_H 1
 
 #include <mszip.h>
 #include <qtm.h>
 #include <lzx.h>
 
 /* generic CAB definitions */
 
 /* structure offsets */
 #define cfhead_Signature         (0x00)
 #define cfhead_CabinetSize       (0x08)
 #define cfhead_FileOffset        (0x10)
 #define cfhead_MinorVersion      (0x18)
 #define cfhead_MajorVersion      (0x19)
 #define cfhead_NumFolders        (0x1A)
 #define cfhead_NumFiles          (0x1C)
 #define cfhead_Flags             (0x1E)
 #define cfhead_SetID             (0x20)
 #define cfhead_CabinetIndex      (0x22)
 #define cfhead_SIZEOF            (0x24)
 #define cfheadext_HeaderReserved (0x00)
 #define cfheadext_FolderReserved (0x02)
 #define cfheadext_DataReserved   (0x03)
 #define cfheadext_SIZEOF         (0x04)
 #define cffold_DataOffset        (0x00)
 #define cffold_NumBlocks         (0x04)
 #define cffold_CompType          (0x06)
 #define cffold_SIZEOF            (0x08)
 #define cffile_UncompressedSize  (0x00)
 #define cffile_FolderOffset      (0x04)
 #define cffile_FolderIndex       (0x08)
 #define cffile_Date              (0x0A)
 #define cffile_Time              (0x0C)
 #define cffile_Attribs           (0x0E)
 #define cffile_SIZEOF            (0x10)
 #define cfdata_CheckSum          (0x00)
 #define cfdata_CompressedSize    (0x04)
 #define cfdata_UncompressedSize  (0x06)
 #define cfdata_SIZEOF            (0x08)
 
 /* flags */
 #define cffoldCOMPTYPE_MASK            (0x000f)
 #define cffoldCOMPTYPE_NONE            (0x0000)
 #define cffoldCOMPTYPE_MSZIP           (0x0001)
 #define cffoldCOMPTYPE_QUANTUM         (0x0002)
 #define cffoldCOMPTYPE_LZX             (0x0003)
 #define cfheadPREV_CABINET             (0x0001)
 #define cfheadNEXT_CABINET             (0x0002)
 #define cfheadRESERVE_PRESENT          (0x0004)
 #define cffileCONTINUED_FROM_PREV      (0xFFFD)
 #define cffileCONTINUED_TO_NEXT        (0xFFFE)
 #define cffileCONTINUED_PREV_AND_NEXT  (0xFFFF)
 
 /* CAB data blocks are <= 32768 bytes in uncompressed form. Uncompressed
  * blocks have zero growth. MSZIP guarantees that it won't grow above
  * uncompressed size by more than 12 bytes. LZX guarantees it won't grow
  * more than 6144 bytes. Quantum has no documentation, but the largest
  * block seen in the wild is 337 bytes above uncompressed size.
  */
 #define CAB_BLOCKMAX (32768)
 #define CAB_INPUTMAX (CAB_BLOCKMAX+6144)
 
 /* CAB compression definitions */
 
 struct mscab_compressor_p {
   struct mscab_compressor base;
   struct mspack_system *system;
   /* todo */
 };
 
 /* CAB decompression definitions */
 
 struct mscabd_decompress_state {
   struct mscabd_folder_p *folder;    /* current folder we're extracting from */
   struct mscabd_folder_data *data;   /* current folder split we're in        */
   unsigned int offset;               /* uncompressed offset within folder    */
   unsigned int block;                /* which block are we decompressing?    */
   struct mspack_system sys;          /* special I/O code for decompressor    */
   int comp_type;                     /* type of compression used by folder   */
   int (*decompress)(void *, off_t);  /* decompressor code                    */
   void *state;                       /* decompressor state                   */
   struct mscabd_cabinet_p *incab;    /* cabinet where input data comes from  */
   struct mspack_file *infh;          /* input file handle                    */
   struct mspack_file *outfh;         /* output file handle                   */
   unsigned char *i_ptr, *i_end;      /* input data consumed, end             */
   unsigned char input[CAB_INPUTMAX]; /* one input block of data              */
 };
 
 struct mscab_decompressor_p {
   struct mscab_decompressor base;
   struct mscabd_decompress_state *d;
   struct mspack_system *system;
   int param[3]; /* !!! MATCH THIS TO NUM OF PARAMS IN MSPACK.H !!! */
   int error;
 };
 
 struct mscabd_cabinet_p {
   struct mscabd_cabinet base;
   off_t blocks_off;                  /* offset to data blocks                */
   int block_resv;                    /* reserved space in data blocks        */
 };
 
 /* there is one of these for every cabinet a folder spans */
 struct mscabd_folder_data {
   struct mscabd_folder_data *next;
   struct mscabd_cabinet_p *cab;      /* cabinet file of this folder span     */
   off_t offset;                      /* cabinet offset of first datablock    */
 };
 
 struct mscabd_folder_p {
   struct mscabd_folder base;
   struct mscabd_folder_data data;    /* where are the data blocks?           */
   struct mscabd_file *merge_prev;    /* do we need to merge backwards?       */
   struct mscabd_file *merge_next;    /* do we need to merge forwards?        */
 };
 
 #endif