1 | /**************************************************************************
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2 | *
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3 | * bitio_m.h -- Macros for bitio
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4 | * Copyright (C) 1994 Neil Sharman and Alistair Moffat
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5 | *
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6 | * This program is free software; you can redistribute it and/or modify
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7 | * it under the terms of the GNU General Public License as published by
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8 | * the Free Software Foundation; either version 2 of the License, or
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9 | * (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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19 | *
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20 | * $Id: bitio_m.h 439 1999-08-10 21:23:37Z sjboddie $
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21 | *
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22 | **************************************************************************/
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23 |
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24 |
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25 | #ifndef H_BITIO_M
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26 | #define H_BITIO_M
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27 |
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28 | /* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- */
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29 |
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30 | #ifndef BIO_ENCODE_PROLOGUE
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31 | #define BIO_ENCODE_PROLOGUE
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32 | #endif
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33 |
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34 | #ifndef BIO_DECODE_PROLOGUE
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35 | #define BIO_DECODE_PROLOGUE
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36 | #endif
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37 |
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38 | #ifndef BIO_ENCODE_EPILOGUE
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39 | #define BIO_ENCODE_EPILOGUE
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40 | #endif
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41 |
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42 | #ifndef BIO_DECODE_EPILOGUE
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43 | #define BIO_DECODE_EPILOGUE
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44 | #endif
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45 |
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46 | #ifndef DECODE_ADD
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47 | #define DECODE_ADD(b) (b) += (b) + DECODE_BIT
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48 | #endif
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49 |
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50 | /* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- */
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51 |
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52 | #define POSITIVE(f, x) \
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53 | if ((x)<=0) \
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54 | fprintf(stderr,"Error: Cannot "#f" encode %lu\n",(unsigned long)x),exit(1);
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55 |
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56 |
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57 | #define CEILLOG_2(x,v) \
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58 | do { \
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59 | register int _B_x = (x) - 1; \
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60 | (v) = 0; \
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61 | for (; _B_x ; _B_x>>=1, (v)++); \
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62 | } while(0)
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63 |
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64 |
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65 | #define FLOORLOG_2(x,v) \
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66 | do { \
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67 | register int _B_x = (x); \
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68 | (v) = -1; \
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69 | for (; _B_x ; _B_x>>=1, (v)++); \
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70 | } while(0)
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71 |
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72 |
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73 | /****************************************************************************/
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74 |
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75 |
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76 |
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77 | #define UNARY_ENCODE(x) \
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78 | do { \
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79 | register unsigned long _B_x = (x); \
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80 | BIO_ENCODE_PROLOGUE; \
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81 | POSITIVE(unary, _B_x); \
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82 | while(--_B_x) ENCODE_BIT(0); \
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83 | ENCODE_BIT(1); \
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84 | BIO_ENCODE_EPILOGUE; \
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85 | } while(0)
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86 |
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87 | #define UNARY_ENCODE_L(x, count) \
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88 | do { \
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89 | register unsigned long _B_x = (x); \
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90 | BIO_ENCODE_PROLOGUE; \
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91 | POSITIVE(unary, _B_x); \
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92 | (count) += _B_x; \
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93 | while(--_B_x) ENCODE_BIT(0); \
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94 | ENCODE_BIT(1); \
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95 | BIO_ENCODE_EPILOGUE; \
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96 | } while(0)
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97 |
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98 | #define UNARY_DECODE(x) \
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99 | do { \
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100 | BIO_DECODE_PROLOGUE; \
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101 | (x) = 1; \
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102 | while (!DECODE_BIT) (x)++; \
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103 | BIO_DECODE_EPILOGUE; \
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104 | } while(0)
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105 |
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106 | #define UNARY_DECODE_L(x, count) \
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107 | do { \
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108 | BIO_DECODE_PROLOGUE; \
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109 | (x) = 1; \
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110 | while (!DECODE_BIT) (x)++; \
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111 | (count) += (x); \
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112 | BIO_DECODE_EPILOGUE; \
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113 | } while(0)
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114 |
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115 |
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116 | #define UNARY_LENGTH(x, count) \
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117 | do { \
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118 | POSITIVE(unary, x); \
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119 | (count) = (x); \
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120 | } while(0)
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121 |
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122 |
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123 | /****************************************************************************/
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124 |
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125 |
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126 | #define BINARY_ENCODE(x, b) \
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127 | do { \
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128 | register unsigned long _B_x = (x); \
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129 | register unsigned long _B_b = (b); \
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130 | register int _B_nbits, _B_logofb, _B_thresh; \
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131 | BIO_ENCODE_PROLOGUE; \
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132 | POSITIVE(binary, _B_x); \
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133 | CEILLOG_2(_B_b, _B_logofb); \
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134 | _B_thresh = (1<<_B_logofb) - _B_b; \
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135 | if (--_B_x < _B_thresh) \
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136 | _B_nbits = _B_logofb-1; \
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137 | else \
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138 | { \
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139 | _B_nbits = _B_logofb; \
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140 | _B_x += _B_thresh; \
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141 | } \
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142 | while (--_B_nbits>=0) \
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143 | ENCODE_BIT((_B_x>>_B_nbits) & 0x1); \
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144 | BIO_ENCODE_EPILOGUE; \
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145 | } while(0)
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146 |
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147 | #define BINARY_ENCODE_L(x, b, count) \
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148 | do { \
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149 | register unsigned long _B_x = (x); \
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150 | register unsigned long _B_b = (b); \
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151 | register int _B_nbits, _B_logofb, _B_thresh; \
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152 | BIO_ENCODE_PROLOGUE; \
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153 | POSITIVE(binary, _B_x); \
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154 | CEILLOG_2(_B_b, _B_logofb); \
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155 | _B_thresh = (1<<_B_logofb) - _B_b; \
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156 | if (--_B_x < _B_thresh) \
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157 | _B_nbits = _B_logofb-1; \
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158 | else \
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159 | { \
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160 | _B_nbits = _B_logofb; \
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161 | _B_x += _B_thresh; \
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162 | } \
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163 | (count) += _B_nbits; \
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164 | while (--_B_nbits>=0) \
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165 | ENCODE_BIT((_B_x>>_B_nbits) & 0x1); \
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166 | BIO_ENCODE_EPILOGUE; \
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167 | } while(0)
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168 |
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169 |
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170 | #define BINARY_DECODE(x, b) \
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171 | do { \
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172 | register unsigned long _B_x = 0; \
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173 | register unsigned long _B_b = (b); \
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174 | register int _B_i, _B_logofb, _B_thresh; \
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175 | BIO_DECODE_PROLOGUE; \
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176 | if (_B_b != 1) \
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177 | { \
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178 | CEILLOG_2(_B_b, _B_logofb); \
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179 | _B_thresh = (1<<_B_logofb) - _B_b; \
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180 | _B_logofb--; \
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181 | for (_B_i=0; _B_i < _B_logofb; _B_i++) \
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182 | DECODE_ADD(_B_x); \
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183 | if (_B_x >= _B_thresh) \
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184 | { \
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185 | DECODE_ADD(_B_x); \
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186 | _B_x -= _B_thresh; \
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187 | } \
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188 | (x) = _B_x+1; \
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189 | } \
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190 | else \
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191 | (x) = 1; \
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192 | BIO_DECODE_EPILOGUE; \
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193 | } while(0)
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194 |
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195 | #define BINARY_DECODE_L(x, b, count) \
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196 | do { \
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197 | register unsigned long _B_x = 0; \
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198 | register unsigned long _B_b = (b); \
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199 | register int _B_i, _B_logofb, _B_thresh; \
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200 | BIO_DECODE_PROLOGUE; \
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201 | if (_B_b != 1) \
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202 | { \
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203 | CEILLOG_2(_B_b, _B_logofb); \
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204 | _B_thresh = (1<<_B_logofb) - _B_b; \
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205 | _B_logofb--; \
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206 | (count) += _B_logofb; \
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207 | for (_B_i=0; _B_i < _B_logofb; _B_i++) \
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208 | DECODE_ADD(_B_x); \
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209 | if (_B_x >= _B_thresh) \
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210 | { \
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211 | DECODE_ADD(_B_x); \
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212 | _B_x -= _B_thresh; \
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213 | (count)++; \
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214 | } \
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215 | (x) = _B_x+1; \
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216 | } \
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217 | else \
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218 | (x) = 1; \
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219 | BIO_DECODE_EPILOGUE; \
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220 | } while(0)
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221 |
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222 | #define BINARY_LENGTH(x, b, count) \
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223 | do { \
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224 | register unsigned long _B_x = (x); \
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225 | register unsigned long _B_b = (b); \
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226 | register int _B_nbits, _B_logofb, _B_thresh; \
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227 | POSITIVE(binary, _B_x); \
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228 | CEILLOG_2(_B_b, _B_logofb); \
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229 | _B_thresh = (1<<_B_logofb) - _B_b; \
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230 | if (--_B_x < _B_thresh) \
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231 | _B_nbits = _B_logofb-1; \
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232 | else \
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233 | _B_nbits = _B_logofb; \
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234 | (count) = _B_nbits; \
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235 | } while(0)
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236 |
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237 | /****************************************************************************/
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238 |
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239 |
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240 |
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241 |
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242 | #define GAMMA_ENCODE(x) \
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243 | do { \
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244 | register unsigned long _B_xx = (x); \
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245 | register int _B_logofb; \
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246 | register int _B_nbits; \
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247 | BIO_ENCODE_PROLOGUE; \
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248 | POSITIVE(gamma, _B_xx); \
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249 | FLOORLOG_2(_B_xx, _B_logofb); \
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250 | _B_nbits = _B_logofb+1; \
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251 | while(_B_logofb--) ENCODE_BIT(0); \
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252 | while (--_B_nbits>=0) \
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253 | ENCODE_BIT((_B_xx>>_B_nbits) & 0x1); \
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254 | BIO_ENCODE_EPILOGUE; \
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255 | } while (0)
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256 |
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257 | #define GAMMA_ENCODE_L(x, count) \
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258 | do { \
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259 | register unsigned long _B_xx = (x); \
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260 | register int _B_logofb; \
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261 | register int _B_nbits; \
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262 | BIO_ENCODE_PROLOGUE; \
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263 | POSITIVE(gamma, _B_xx); \
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264 | FLOORLOG_2(_B_xx, _B_logofb); \
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265 | _B_nbits = _B_logofb+1; \
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266 | (count) += _B_logofb*2+1; \
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267 | while(_B_logofb--) ENCODE_BIT(0); \
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268 | while (--_B_nbits>=0) \
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269 | ENCODE_BIT((_B_xx>>_B_nbits) & 0x1); \
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270 | BIO_ENCODE_EPILOGUE; \
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271 | } while (0)
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272 |
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273 | #define GAMMA_DECODE(x) \
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274 | do { \
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275 | register unsigned long _B_xx = 1; \
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276 | register int _B_nbits = 0; \
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277 | BIO_DECODE_PROLOGUE; \
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278 | while(!DECODE_BIT) _B_nbits++; \
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279 | while (_B_nbits-- > 0) \
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280 | DECODE_ADD(_B_xx); \
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281 | (x) = _B_xx; \
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282 | BIO_DECODE_EPILOGUE; \
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283 | } while (0)
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284 |
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285 | #define GAMMA_DECODE_L(x, count) \
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286 | do { \
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287 | register unsigned long _B_xx = 1; \
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288 | register int _B_nbits = 0; \
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289 | BIO_DECODE_PROLOGUE; \
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290 | while(!DECODE_BIT) _B_nbits++; \
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291 | (count) += _B_nbits*2+1; \
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292 | while (_B_nbits-- > 0) \
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293 | DECODE_ADD(_B_xx); \
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294 | (x) = _B_xx; \
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295 | BIO_DECODE_EPILOGUE; \
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296 | } while (0)
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297 |
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298 | #define GAMMA_LENGTH(x, count) \
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299 | do { \
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300 | register unsigned long _B_xx = (x); \
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301 | register int _B_logofb; \
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302 | POSITIVE(gamma, _B_xx); \
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303 | FLOORLOG_2(_B_xx, _B_logofb); \
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304 | (count) = _B_logofb*2+1; \
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305 | } while (0)
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306 |
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307 |
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308 |
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309 | /****************************************************************************/
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310 |
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311 |
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312 | #define DELTA_ENCODE(x) \
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313 | do { \
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314 | register unsigned long _B_xxx = (x); \
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315 | register int _B_logx; \
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316 | FLOORLOG_2(_B_xxx, _B_logx); \
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317 | GAMMA_ENCODE(_B_logx+1); \
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318 | BINARY_ENCODE(_B_xxx+1, 1<<_B_logx); \
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319 | } while (0)
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320 |
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321 | #define DELTA_ENCODE_L(x, count) \
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322 | do { \
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323 | register unsigned long _B_xxx = (x); \
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324 | register int _B_logx; \
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325 | FLOORLOG_2(_B_xxx, _B_logx); \
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326 | GAMMA_ENCODE_L(_B_logx+1, count); \
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327 | BINARY_ENCODE_L(_B_xxx+1, 1<<_B_logx, count); \
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328 | } while (0)
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329 |
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330 |
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331 | #define DELTA_DECODE(x) \
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332 | do { \
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333 | register unsigned long _B_xxx; \
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334 | register int _B_logx; \
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335 | GAMMA_DECODE(_B_logx); _B_logx--; \
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336 | BINARY_DECODE(_B_xxx, 1<<_B_logx); _B_xxx--; \
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337 | (x) = _B_xxx + (1<<_B_logx); \
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338 | } while (0)
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339 |
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340 | #define DELTA_DECODE_L(x, count) \
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341 | do { \
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342 | register unsigned long _B_xxx; \
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343 | register int _B_logx; \
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344 | GAMMA_DECODE_L(_B_logx, count); _B_logx--; \
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345 | BINARY_DECODE_L(_B_xxx, 1<<_B_logx, count); _B_xxx--; \
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346 | (x) = _B_xxx + (1<<_B_logx); \
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347 | } while (0)
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348 |
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349 | #define DELTA_LENGTH(x, count) \
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350 | do { \
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351 | register unsigned long _B_xxx = (x); \
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352 | register int _B_logx, _B_dcount; \
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353 | FLOORLOG_2(_B_xxx, _B_logx); \
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354 | GAMMA_LENGTH(_B_logx+1, count); \
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355 | BINARY_LENGTH(_B_xxx+1, 1<<_B_logx, _B_dcount); \
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356 | (count) += _B_dcount; \
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357 | } while (0)
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358 |
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359 |
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360 | /****************************************************************************/
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361 |
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362 |
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363 |
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364 |
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365 | #define ELIAS_ENCODE(x, b, s) \
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366 | do { \
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367 | register unsigned long _B_xx = (x); \
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368 | register unsigned long _B_b = (b); \
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369 | register double _B_s = (s); \
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370 | register int _B_lower=1, _B_upper=1; \
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371 | register int _B_k=0; \
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372 | register double _B_pow=1.0; \
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373 | POSITIVE(elias, _B_xx); \
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374 | while (_B_xx>_B_upper) \
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375 | { \
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376 | _B_k++; \
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377 | _B_lower = _B_upper+1; \
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378 | _B_pow *= _B_s; \
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379 | _B_upper += _B_b*_B_pow; \
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380 | } \
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381 | UNARY_ENCODE(_B_k+1); \
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382 | BINARY_ENCODE(_B_xx-_B_lower+1, _B_upper-_B_lower+1); \
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383 | } while (0)
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384 |
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385 | #define ELIAS_ENCODE_L(x, b, s, count) \
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386 | do { \
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387 | register unsigned long _B_xx = (x); \
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388 | register unsigned long _B_b = (b); \
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389 | register double _B_s = (s); \
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390 | register int _B_lower=1, _B_upper=1; \
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391 | register int _B_k=0; \
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392 | register double _B_pow=1.0; \
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393 | POSITIVE(elias, _B_xx); \
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394 | while (_B_xx>_B_upper) \
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395 | { \
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396 | _B_k++; \
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397 | _B_lower = _B_upper+1; \
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398 | _B_pow *= _B_s; \
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399 | _B_upper += _B_b*_B_pow; \
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400 | } \
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401 | UNARY_ENCODE_L(_B_k+1, count); \
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402 | BINARY_ENCODE_L(_B_xx-_B_lower+1, _B_upper-_B_lower+1, count); \
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403 | } while (0)
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404 |
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405 | #define ELIAS_DECODE(x, b, s) \
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406 | do { \
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407 | register unsigned long _B_xx; \
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408 | register unsigned long _B_b = (b); \
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409 | register double _B_s = (s); \
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410 | register int _B_lower=1, _B_upper=1; \
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411 | register int _B_k; \
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412 | register double _B_pow=1.0; \
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413 | UNARY_DECODE(_B_k); _B_k--; \
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414 | while (_B_k--) \
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415 | { \
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416 | _B_lower = _B_upper+1; \
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417 | _B_pow *= _B_s; \
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418 | _B_upper += _B_b*_B_pow; \
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419 | } \
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420 | BINARY_DECODE(_B_xx, _B_upper-_B_lower+1); _B_xx--; \
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421 | POSITIVE(gamma, _B_xx+_B_lower); \
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422 | (x) = _B_xx+_B_lower; \
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423 | } while (0)
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424 |
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425 | #define ELIAS_DECODE_L(x, b, s, count) \
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426 | do { \
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427 | register unsigned long _B_xx; \
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428 | register unsigned long _B_b = (b); \
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429 | register double _B_s = (s); \
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430 | register int _B_lower=1, _B_upper=1; \
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431 | register int _B_k; \
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432 | register double _B_pow=1.0; \
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433 | UNARY_DECODE_L(_B_k, count); _B_k--; \
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434 | while (_B_k--) \
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435 | { \
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436 | _B_lower = _B_upper+1; \
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437 | _B_pow *= _B_s; \
|
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438 | _B_upper += _B_b*_B_pow; \
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439 | } \
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440 | BINARY_DECODE_L(_B_xx, _B_upper-_B_lower+1, count); _B_xx--; \
|
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441 | POSITIVE(gamma, _B_xx+_B_lower); \
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442 | (x) = _B_xx+_B_lower; \
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443 | } while (0)
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444 |
|
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445 | #define ELIAS_LENGTH(x, b, s, count) \
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446 | do { \
|
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447 | register unsigned long _B_xx = (x); \
|
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448 | register unsigned long _B_b = (b); \
|
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449 | register double _B_s = (s); \
|
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450 | register int _B_lower=1, _B_upper=1; \
|
---|
451 | register int _B_k=0, _B_ecount; \
|
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452 | register double _B_pow=1.0; \
|
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453 | POSITIVE(gamma, _B_xx); \
|
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454 | while (_B_xx>_B_upper) \
|
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455 | { \
|
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456 | _B_k++; \
|
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457 | _B_lower = _B_upper+1; \
|
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458 | _B_pow *= _B_s; \
|
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459 | _B_upper += _B_b*_B_pow; \
|
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460 | } \
|
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461 | UNARY_LENGTH(_B_k+1, count); \
|
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462 | BINARY_LENGTH(_B_xx-_B_lower+1, _B_upper-_B_lower+1, _B_ecount); \
|
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463 | (count) += _B_ecount; \
|
---|
464 | } while (0)
|
---|
465 |
|
---|
466 |
|
---|
467 | /****************************************************************************/
|
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468 |
|
---|
469 |
|
---|
470 | #define BBLOCK_ENCODE(x, b) \
|
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471 | do { \
|
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472 | register unsigned long _B_xx = (x); \
|
---|
473 | register unsigned long _B_bb = (b); \
|
---|
474 | register int _B_xdivb = 0; \
|
---|
475 | POSITIVE(bblock, _B_xx); \
|
---|
476 | _B_xx--; \
|
---|
477 | while (_B_xx >= _B_bb) \
|
---|
478 | { \
|
---|
479 | _B_xdivb++; \
|
---|
480 | _B_xx -= _B_bb; \
|
---|
481 | } \
|
---|
482 | UNARY_ENCODE(_B_xdivb+1); \
|
---|
483 | BINARY_ENCODE(_B_xx+1, _B_bb); \
|
---|
484 | } while (0)
|
---|
485 |
|
---|
486 | #define BBLOCK_ENCODE_L(x, b, count) \
|
---|
487 | do { \
|
---|
488 | register unsigned long _B_xx = (x); \
|
---|
489 | register unsigned long _B_bb = (b); \
|
---|
490 | register int _B_xdivb = 0; \
|
---|
491 | POSITIVE(bblock, _B_xx); \
|
---|
492 | _B_xx--; \
|
---|
493 | while (_B_xx >= _B_bb) \
|
---|
494 | { \
|
---|
495 | _B_xdivb++; \
|
---|
496 | _B_xx -= _B_bb; \
|
---|
497 | } \
|
---|
498 | UNARY_ENCODE_L(_B_xdivb+1, count); \
|
---|
499 | BINARY_ENCODE_L(_B_xx+1, _B_bb, count); \
|
---|
500 | } while (0)
|
---|
501 |
|
---|
502 | #define BBLOCK_DECODE(x, b) \
|
---|
503 | do { \
|
---|
504 | register unsigned long _B_x1, _B_xx = 0; \
|
---|
505 | register unsigned long _B_bb = (b); \
|
---|
506 | register int _B_xdivb; \
|
---|
507 | UNARY_DECODE(_B_xdivb); _B_xdivb--; \
|
---|
508 | while (_B_xdivb--) \
|
---|
509 | _B_xx += _B_bb; \
|
---|
510 | BINARY_DECODE(_B_x1, _B_bb); \
|
---|
511 | (x) = _B_xx+_B_x1; \
|
---|
512 | } while (0)
|
---|
513 |
|
---|
514 | #define BBLOCK_DECODE_L(x, b, count) \
|
---|
515 | do { \
|
---|
516 | register unsigned long _B_x1, _B_xx = 0; \
|
---|
517 | register unsigned long _B_bb = (b); \
|
---|
518 | register int _B_xdivb; \
|
---|
519 | UNARY_DECODE_L(_B_xdivb, count); _B_xdivb--; \
|
---|
520 | while (_B_xdivb--) \
|
---|
521 | _B_xx += _B_bb; \
|
---|
522 | BINARY_DECODE_L(_B_x1, _B_bb, count); \
|
---|
523 | (x) = _B_xx+_B_x1; \
|
---|
524 | } while (0)
|
---|
525 |
|
---|
526 | #define BBLOCK_LENGTH(x, b, count) \
|
---|
527 | do { \
|
---|
528 | register unsigned long _B_bcount, _B_xx = (x); \
|
---|
529 | register unsigned long _B_bb = (b); \
|
---|
530 | register int _B_xdivb = 0; \
|
---|
531 | POSITIVE(bblock, _B_xx); \
|
---|
532 | _B_xx--; \
|
---|
533 | while (_B_xx >= _B_bb) \
|
---|
534 | { \
|
---|
535 | _B_xdivb++; \
|
---|
536 | _B_xx -= _B_bb; \
|
---|
537 | } \
|
---|
538 | UNARY_LENGTH(_B_xdivb+1, count); \
|
---|
539 | BINARY_LENGTH(_B_xx+1, _B_bb, _B_bcount); \
|
---|
540 | (count) += _B_bcount; \
|
---|
541 | } while (0)
|
---|
542 |
|
---|
543 | #endif
|
---|