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#ifndef _RAR_COMPRESS_
#define _RAR_COMPRESS_
// Combine pack and unpack constants to class to avoid polluting global
// namespace with numerous short names.
class PackDef
{
public:
// Maximum LZ match length we can encode even for short distances.
static const uint MAX_LZ_MATCH = 0x1001;
// We increment LZ match length for longer distances, because shortest
// matches are not allowed for them. Maximum length increment is 3
// for distances larger than 256KB (0x40000). Here we define the maximum
// incremented LZ match. Normally packer does not use it, but we must be
// ready to process it in corrupt archives.
static const uint MAX_INC_LZ_MATCH = MAX_LZ_MATCH + 3;
static const uint MAX3_LZ_MATCH = 0x101; // Maximum match length for RAR v3.
static const uint LOW_DIST_REP_COUNT = 16;
static const uint NC = 306; /* alphabet = {0, 1, 2, ..., NC - 1} */
static const uint DC = 64;
static const uint LDC = 16;
static const uint RC = 44;
static const uint HUFF_TABLE_SIZE = NC + DC + RC + LDC;
static const uint BC = 20;
static const uint NC30 = 299; /* alphabet = {0, 1, 2, ..., NC - 1} */
static const uint DC30 = 60;
static const uint LDC30 = 17;
static const uint RC30 = 28;
static const uint BC30 = 20;
static const uint HUFF_TABLE_SIZE30 = NC30 + DC30 + RC30 + LDC30;
static const uint NC20 = 298; /* alphabet = {0, 1, 2, ..., NC - 1} */
static const uint DC20 = 48;
static const uint RC20 = 28;
static const uint BC20 = 19;
static const uint MC20 = 257;
// Largest alphabet size among all values listed above.
static const uint LARGEST_TABLE_SIZE = 306;
enum {
CODE_HUFFMAN, CODE_LZ, CODE_REPEATLZ, CODE_CACHELZ, CODE_STARTFILE,
CODE_ENDFILE, CODE_FILTER, CODE_FILTERDATA
};
};
enum FilterType {
// These values must not be changed, because we use them directly
// in RAR5 compression and decompression code.
FILTER_DELTA=0, FILTER_E8, FILTER_E8E9, FILTER_ARM,
FILTER_AUDIO, FILTER_RGB, FILTER_ITANIUM, FILTER_PPM, FILTER_NONE
};
#endif
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