| |
| /******************************************************************** |
| * Workfile : util.c |
| * Project : Kraken |
| * Author : khwoo |
| * Description: Commands Template |
| * |
| * Copyright (c) 2009 HUMAX Co., Ltd. |
| * All rights reserved. |
| ********************************************************************/ |
| |
| #define _______________________________________________________________________ |
| #define ____HEADER_FILES____ |
| #include "htype.h" |
| #include "util.h" |
| |
| #define _______________________________________________________________________ |
| #define ____MACRO_DEFINITION____ |
| |
| |
| #define _______________________________________________________________________ |
| #define ____EXTERNAL_VARIABLE_DEFINITION____ |
| |
| |
| #define _______________________________________________________________________ |
| #define ____EXTERNAL_FUNCTION_DEFINITION____ |
| |
| |
| #define _______________________________________________________________________ |
| #define ____TYPE_DEFINITION____ |
| |
| |
| #define _______________________________________________________________________ |
| #define ____GLOBAL_VARIABLE_DEFINITION____ |
| |
| |
| #define _______________________________________________________________________ |
| #define ____STATIC_VARIABLE_DEFINITION____ |
| const static unsigned short CRC_16_TABLE[256] = |
| { |
| 0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241, |
| 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440, |
| 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40, |
| 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841, |
| 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40, |
| 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41, |
| 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641, |
| 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040, |
| 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240, |
| 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441, |
| 0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41, |
| 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840, |
| 0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, |
| 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40, |
| 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640, |
| 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041, |
| 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240, |
| 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441, |
| 0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, |
| 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840, |
| 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41, |
| 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, |
| 0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640, |
| 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041, |
| 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241, |
| 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440, |
| 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40, |
| 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, |
| 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, |
| 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, |
| 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, |
| 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040 |
| }; |
| |
| const static unsigned long _crc32Tbl[256] = |
| { |
| 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, |
| 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, |
| 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, |
| 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, |
| 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, |
| 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, |
| 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, |
| 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, |
| 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, |
| 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, |
| 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, |
| 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, |
| 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, |
| 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, |
| 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, |
| 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, |
| 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, |
| 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, |
| 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, |
| 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, |
| 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, |
| 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, |
| 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, |
| 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, |
| 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, |
| 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, |
| 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, |
| 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, |
| 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, |
| 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, |
| 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, |
| 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, |
| 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, |
| 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, |
| 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, |
| 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, |
| 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, |
| 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, |
| 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, |
| 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, |
| 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, |
| 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, |
| 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, |
| 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, |
| 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, |
| 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, |
| 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, |
| 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, |
| 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, |
| 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, |
| 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, |
| 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, |
| 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, |
| 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, |
| 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, |
| 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, |
| 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, |
| 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, |
| 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, |
| 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, |
| 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, |
| 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, |
| 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, |
| 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, |
| }; /* _crc32Tbl */ |
| |
| #define N_BIT_Byte 8 |
| #define SIZE_BitBuf (N_BIT_Byte * sizeof(_bitBuf)) |
| #define N_BIT_Dic 13 |
| #define SIZE_Dic (1 << N_BIT_Dic) |
| #define MAX_Match 256 |
| #define THRESHOLD 3 |
| #define MAX_ByteNum 255 |
| #define NC (MAX_ByteNum + MAX_Match+2-THRESHOLD) |
| #define N_BIT_C 9 |
| #define N_BIT_Code 16 |
| |
| |
| #define NP (N_BIT_Dic+1) |
| #define NT (N_BIT_Code+3) |
| #define PBIT 4 // smallest integer such that (1U<<PBIT) > NP |
| #define TBIT 5 // smallest integer such that (1U<<TBIT) > NT |
| #if NT>NP |
| #define NPT NT |
| #else |
| #define NPT NP |
| #endif |
| |
| extern unsigned long _compDataSize ; // compressed data size |
| extern unsigned long _orgDataSize ; // original data size |
| extern unsigned char _decompBuf[0x8000] ; // decompress buffer |
| |
| unsigned char _cLen[NC], _ptLen[NPT + 100], *_orgData, _dicBuf[SIZE_Dic]; |
| unsigned short _left[2*NC-1], _right[2*NC-1], _blkSize, _cTbl[4096], |
| _ptTbl[256], _bitBuf, _subBitBuf, |
| _start[18], _count[17], _weight[17]; |
| short _bitCount; |
| unsigned short _compSize; |
| |
| |
| #define _______________________________________________________________________ |
| #define ____STATIC_FUNCTION_DEFINITION____ |
| |
| |
| #define _______________________________________________________________________ |
| #define ____STATIC_FUNCTION_BODY____ |
| |
| |
| #define _______________________________________________________________________ |
| #define ____GLOBAL_FUNCTION_BODY____ |
| |
| unsigned short GetCRC16(unsigned char *BufferPtr, unsigned long NumberOfByte) |
| { |
| unsigned short CRC ; |
| |
| CRC = 0; |
| while (NumberOfByte--) |
| { |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ *BufferPtr++) & 0xff] ; |
| } |
| |
| return CRC ; |
| } /* GetCrc16 */ |
| |
| unsigned short GetCRC16Fast(void *inP, unsigned long NumberOfByte) |
| { |
| unsigned short CRC ; |
| unsigned long *aligned_4; |
| unsigned long pre_count, end_count,loop_4; |
| unsigned long data; |
| unsigned char *BufferPtr = inP; |
| |
| if (NumberOfByte < 4) |
| { |
| return GetCRC16(inP, NumberOfByte); |
| } |
| pre_count = ((unsigned long)BufferPtr & 0x03); |
| if(pre_count!=0) |
| pre_count = 4-pre_count; |
| aligned_4 = (unsigned long *)((unsigned long)BufferPtr + pre_count); |
| loop_4 = (NumberOfByte-pre_count)>>2; |
| end_count = NumberOfByte-(loop_4<<2)-pre_count; |
| |
| CRC=0; |
| while((pre_count--)!=0) |
| { |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ *BufferPtr++) & 0xff] ; |
| } |
| |
| BufferPtr=(unsigned char *)aligned_4+(loop_4<<2); |
| |
| while((loop_4--)!=0) |
| { |
| data= *aligned_4++; |
| #if defined(CONFIG_BIG_ENDIAN) |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ (data>>24)) & 0xff]; |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ (data>>16)) & 0xff]; |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ (data>> 8)) & 0xff]; |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ (data )) & 0xff]; |
| #else |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ (data )) & 0xff]; |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ (data>> 8)) & 0xff]; |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ (data>>16)) & 0xff]; |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ (data>>24)) & 0xff]; |
| #endif |
| } |
| |
| while((end_count--)!=0) |
| { |
| CRC = (CRC >> 8) ^ CRC_16_TABLE[(CRC ^ *BufferPtr++) & 0xff]; |
| } |
| |
| return CRC ; |
| |
| } /* GetCrc16 */ |
| |
| unsigned long GetCrc32(unsigned char *p, unsigned long n) |
| { |
| unsigned long crc, *tbl; |
| unsigned long len; |
| |
| len = n; |
| |
| crc = 0xFFFFFFFF; |
| tbl = (unsigned long*)_crc32Tbl; |
| while (n--) |
| { |
| crc = (crc >> 8) ^ tbl[(crc ^ *p) & 0xff]; |
| p++; |
| } |
| return ~crc; |
| } /* GetCrc32 */ |
| |
| unsigned long GetCRC32Fast(void *inP, unsigned long NumberOfByte) |
| { |
| register unsigned long CRC ; |
| unsigned long *aligned_4; |
| unsigned long pre_count, end_count,loop_4; |
| unsigned long data; |
| unsigned char *BufferPtr = inP; |
| |
| if (NumberOfByte < 4) |
| { |
| return GetCrc32(inP, NumberOfByte); |
| } |
| pre_count = ((unsigned long)BufferPtr & 0x03); |
| if(pre_count!=0) |
| pre_count = 4-pre_count; |
| aligned_4 = (unsigned long *)((unsigned long)BufferPtr + pre_count); |
| loop_4 = (NumberOfByte-pre_count)>>2; |
| end_count = NumberOfByte-(loop_4<<2)-pre_count; |
| |
| CRC = 0xFFFFFFFF; |
| while((pre_count--)!=0) |
| { |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ *BufferPtr++) & 0xff] ; |
| } |
| |
| BufferPtr=(unsigned char *)aligned_4+(loop_4<<2); |
| |
| while((loop_4--)!=0) |
| { |
| data= *aligned_4++; |
| #if defined(CONFIG_BIG_ENDIAN) |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ (data>>24)) & 0xff]; |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ (data>>16)) & 0xff]; |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ (data>> 8)) & 0xff]; |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ (data )) & 0xff]; |
| #else |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ (data )) & 0xff]; |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ (data>> 8)) & 0xff]; |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ (data>>16)) & 0xff]; |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ (data>>24)) & 0xff]; |
| #endif |
| } |
| |
| while((end_count--)!=0) |
| { |
| CRC = (CRC >> 8) ^ _crc32Tbl[(CRC ^ *BufferPtr++) & 0xff] ; |
| } |
| |
| return ~CRC ; |
| |
| } /* GetCrc16 */ |
| |
| |
| unsigned short Get12Bits(unsigned char * base) |
| { |
| unsigned short temp = 0 ; |
| |
| temp |= *(base + 0) ; |
| temp <<= 8 ; |
| temp |= *(base + 1) ; |
| |
| return temp & 0x0FFF ; |
| } /* Get12Bits */ |
| |
| unsigned short Get16Bits(unsigned char *base) |
| { |
| unsigned short temp = 0 ; |
| |
| temp |= *(base + 0) ; |
| temp <<= 8 ; |
| temp |= *(base + 1) ; |
| |
| return temp ; |
| } /* Get16Bits */ |
| |
| unsigned long Get24Bits(unsigned char *base) |
| { |
| unsigned long temp = 0 ; |
| |
| temp |= *(base + 0) ; |
| temp <<= 8 ; |
| temp |= *(base + 1) ; |
| temp <<= 8 ; |
| temp |= *(base + 2) ; |
| |
| return temp ; |
| } /* Get24Bits */ |
| |
| unsigned long Get32Bits(unsigned char *base) |
| { |
| unsigned long temp = 0 ; |
| |
| temp |= *(base + 0) ; |
| temp <<= 8 ; |
| temp |= *(base + 1) ; |
| temp <<= 8 ; |
| temp |= *(base + 2) ; |
| temp <<= 8 ; |
| temp |= *(base + 3) ; |
| |
| return temp ; |
| } /* Get32Bits */ |
| |
| unsigned short SWAP16(unsigned short A) |
| { |
| return (((A >> 8) | (A << 8))); |
| } |
| |
| unsigned int SWAP32(unsigned long A) |
| { |
| return ((A << 24) | ((A << 8) & 0xFF0000) | ((A >> 8) & 0xFF00) |(A >> 24)); |
| } |
| |
| void MakeTbl(unsigned short nChar, unsigned char *bitLen, unsigned short tblBits, unsigned short *tbl) |
| { |
| unsigned short *wp, *wpp, *wppp, i, k, avail, mask; |
| unsigned short len, ch, jutBits, nextCode; |
| unsigned char *bp; |
| |
| for (wp=&_count[1],i=1; i<=16; i++) |
| *wp++ = 0; |
| for (wp=_count, bp=bitLen, i=0; i<nChar; i++) |
| wp[*bp++]++; |
| |
| for (wp=&_start[1],wpp=&_count[1],*wp=0,i=1,k=15; i<=16; i++,k--,wp++) |
| wp[1] = *wp + (*wpp++ << k); |
| |
| if (_start[17] != (unsigned short)(1U << 16)) |
| printf("\n\nDecompression error: BAD TABLE\r\n\r\n"); |
| |
| jutBits = 16-tblBits; |
| |
| for (wp=&_start[1],wpp=&_weight[1],i=1,k=tblBits-1; i<=tblBits; i++,k--) |
| { |
| *wp >>= jutBits; |
| wp++; |
| *wpp++ = 1U << k; |
| } |
| |
| for (k=16-i,wp=&_weight[i]; i<=16; i++,k--) |
| *wp++ = 1U << k; |
| |
| i = _start[tblBits+1] >> jutBits; |
| if (i != (unsigned short)(1U << 16)) |
| { |
| k = 1U << tblBits; |
| while (i!=k) |
| tbl[i++] = 0; |
| } |
| |
| avail = nChar; |
| mask = 1U << (15-tblBits); |
| wpp = _right; |
| wppp = _left; |
| for (ch=0,bp=bitLen; ch<nChar; ch++) |
| { |
| if ((len = *bp++) == 0) |
| continue; |
| |
| k = _start[len]; |
| nextCode = k + _weight[len]; |
| |
| if (len <= tblBits) |
| { |
| for (wp=tbl+k; k<nextCode; k++) |
| *wp++ = ch; |
| } |
| else |
| { |
| wp = tbl + (k >> jutBits); |
| i = len-tblBits; |
| while (i != 0) |
| { |
| if (*wp == 0) |
| { |
| wpp[avail] = wppp[avail] = 0; |
| *wp = avail++; |
| } |
| wp = (k&mask ? wpp : wppp) + *wp; |
| k <<= 1; |
| i--; |
| } |
| *wp = ch; |
| } |
| _start[len] = nextCode; |
| } |
| } /* MakeTbl */ |
| |
| |
| void FillBuf(unsigned short n) /* Shift _bitBuf n bits left, read n bits */ |
| { |
| _bitBuf <<= n; |
| while (n > _bitCount) |
| { |
| n -= _bitCount; |
| _bitBuf |= _subBitBuf << n; |
| if (_compSize != 0) |
| { |
| _compSize--; |
| _subBitBuf = *_orgData++; |
| } |
| else |
| _subBitBuf = 0; |
| _bitCount = N_BIT_Byte; |
| } |
| _bitCount -= n; |
| _bitBuf |= _subBitBuf >> _bitCount; |
| } /* FillBuf */ |
| |
| |
| unsigned short GetBits(unsigned short n) |
| { |
| unsigned short x; |
| |
| x = _bitBuf >> (SIZE_BitBuf-n); |
| FillBuf(n); |
| |
| return x; |
| } /* GetBits */ |
| |
| |
| void ReadPtLen(signed short nn, signed short nBit, signed short iSpecial) |
| { |
| signed short i,c,n; |
| unsigned short mask, *wp; |
| unsigned char *bp; |
| |
| n = GetBits(nBit); |
| if (n == 0) |
| { |
| c = GetBits(nBit); |
| |
| for (bp=_ptLen,i=0; i<nn; i++) |
| *bp++ = 0; |
| for (wp=_ptTbl,i=0; i<256; i++) |
| *wp++ = c; |
| } |
| else |
| { |
| i = 0; |
| bp = _ptLen; |
| while (i < n) |
| { |
| c = _bitBuf >> (SIZE_BitBuf-3); |
| if (c == 7) |
| { |
| mask = 1U << (SIZE_BitBuf-1-3); |
| while (mask & _bitBuf) |
| { |
| mask >>= 1; |
| c++; |
| } |
| } |
| FillBuf(c<7 ? 3 : c-3); |
| bp[i++] = (unsigned char)c; |
| if (i == iSpecial) |
| { |
| c = GetBits(2); |
| while (--c >= 0) |
| bp[i++] = 0; |
| } |
| } |
| while (i<nn) |
| bp[i++] = 0; |
| MakeTbl(nn, bp, 8, _ptTbl); |
| } |
| } /* ReadPtLen */ |
| |
| |
| void ReadCLen(void) |
| { |
| signed short i, c, n; |
| unsigned short mask, *wp, *wpp; |
| unsigned char *bp, *bpp; |
| |
| n = GetBits(N_BIT_C); |
| bp = _cLen; |
| if (n == 0) |
| { |
| c = GetBits(N_BIT_C); |
| for (i=0; i<NC; i++) |
| *bp++ = 0; |
| for (wp=_cTbl,i=0; i<4096; i++) |
| *wp++ = c; |
| } |
| else |
| { |
| i = 0; |
| bpp = _ptLen; |
| wp = _right; |
| wpp = _left; |
| while (i < n) |
| { |
| c = _ptTbl[_bitBuf>>(SIZE_BitBuf-8)]; |
| if (c >= NT) |
| { |
| mask = 1U << (SIZE_BitBuf-1-8); |
| do |
| { |
| c = (_bitBuf & mask) ? wp[c] : wpp[c]; |
| mask >>= 1; |
| } while (c >= NT); |
| } |
| FillBuf(bpp[c]); |
| if (c <= 2) |
| { |
| if (c == 0) c = 1; |
| else if (c == 1) c = GetBits(4) + 3; |
| else c = GetBits(N_BIT_C) + 20; |
| |
| while (--c >= 0) |
| bp[i++]=0; |
| } |
| else |
| bp[i++] = c-2; |
| } |
| while (i < NC) |
| bp[i++] = 0; |
| MakeTbl(NC, bp, 12, _cTbl); |
| } |
| } /* ReadCLen */ |
| |
| |
| unsigned short DecodeC(void) |
| { |
| unsigned short i, mask, *wp, *wpp; |
| |
| if (_blkSize == 0) |
| { |
| _blkSize = GetBits(16); |
| ReadPtLen(NT, TBIT, 3); |
| ReadCLen(); |
| ReadPtLen(NP, PBIT, (unsigned short)-1); |
| } |
| _blkSize--; |
| i = _cTbl[_bitBuf >> (SIZE_BitBuf-12)]; |
| if (i >= NC) |
| { |
| mask = 1U << (SIZE_BitBuf-1-12); |
| wp = _right; |
| wpp = _left; |
| do |
| { |
| i = (_bitBuf & mask) ? wp[i] : wpp[i]; |
| mask >>= 1; |
| } while (i >= NC); |
| } |
| FillBuf(_cLen[i]); |
| |
| return i; |
| } /* DecodeC */ |
| |
| |
| unsigned short DecodeP(void) |
| { |
| unsigned short i, mask, *wp, *wpp; |
| |
| i = _ptTbl[_bitBuf >> (SIZE_BitBuf-8)]; |
| if (i >= NP) |
| { |
| mask = 1U << (SIZE_BitBuf-1-8); |
| wp = _right; |
| wpp = _left; |
| do |
| { |
| i = (_bitBuf & mask) ? wp[i] : wpp[i]; |
| mask >>= 1; |
| } while (i >= NP); |
| } |
| FillBuf(_ptLen[i]); |
| if (i != 0) |
| i = (1U << (i-1)) + GetBits(i-1); |
| |
| return i; |
| } /* DecodeP */ |
| |
| |
| unsigned char *DecompressData(unsigned char *data) |
| { |
| signed short rem, n, i, r, c; // rem: remaining unsigned chars to copy |
| unsigned char *dicBuf, *decompBuf; |
| unsigned short orgSize; |
| |
| _orgData = data; |
| orgSize = (unsigned short)_orgDataSize; |
| _compSize = (unsigned short)_compDataSize; |
| decompBuf = _decompBuf; |
| |
| _bitBuf = _subBitBuf = 0; |
| _bitCount = 0; |
| FillBuf(SIZE_BitBuf); |
| _blkSize = 0; |
| rem = 0; |
| i = 0; |
| |
| while (orgSize != 0) |
| { |
| dicBuf = _dicBuf; |
| |
| n = (orgSize > SIZE_Dic) ? SIZE_Dic : orgSize; |
| |
| r = 0; |
| while (--rem >= 0) |
| { |
| dicBuf[r] = dicBuf[i]; |
| i = (i+1) & (SIZE_Dic-1); |
| if (++r == n) |
| goto NEXT; |
| } |
| |
| while(1) |
| { |
| c = DecodeC(); |
| if (c <= MAX_ByteNum) |
| { |
| dicBuf[r] = (unsigned char)c; |
| if (++r == n) |
| goto NEXT; |
| } |
| else |
| { |
| rem = c - (MAX_ByteNum+1-THRESHOLD); |
| i = (r-DecodeP()-1) & (SIZE_Dic-1); |
| while (--rem >= 0) |
| { |
| dicBuf[r] = dicBuf[i]; |
| i = (i+1) & (SIZE_Dic-1); |
| if (++r == n) |
| goto NEXT; |
| } |
| } |
| } |
| |
| NEXT: |
| |
| for (r=0; r<n; r++) |
| *decompBuf++ = *dicBuf++; |
| |
| orgSize -= n; |
| } |
| |
| // DSI_printf(0, "Decomp end\r\n"); |
| |
| return _decompBuf; |
| } /* Decompress */ |
| |