/* packhead.h: Header definition of compressed data Copyright (C) 2000 Thomas Nussbaumer Copyright (C) 2007 Kevin Kofler This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef PACKHEAD_H #define PACKHEAD_H #define MAGIC_CHAR1 'T' #define MAGIC_CHAR2 'P' #define MAX_RLE_ENTRIES 31 // size = 16 bytes typedef struct { unsigned char origsize_lo; // original size lowbyte unsigned char origsize_hi; // original size highbyte unsigned char magic1; // must be equal to MAGIC_CHAR1 unsigned char magic2; // must be equal to MAGIC_CHAR2 unsigned char compsize_lo; // compressed size lowbyte unsigned char compsize_hi; // compressed size lowbyte unsigned char esc1; // escape >> (8-escBits) unsigned char notused3; unsigned char notused4; unsigned char esc2; // escBits unsigned char gamma1; // maxGamma + 1 unsigned char gamma2; // (1<origsize_lo | ((p)->origsize_hi << 8)) #define IsPacked(p) ((p)->magic1 == MAGIC_CHAR1 && (p)->magic2 == MAGIC_CHAR2) typedef struct { unsigned char value[MAX_RLE_ENTRIES]; } RLEEntries; #endif