| | 1 | | using System; |
| | 2 | | using Reminiscence.Arrays; |
| | 3 | |
|
| | 4 | | namespace Itinero.Network.Storage; |
| | 5 | |
|
| | 6 | | internal static class BitCoder |
| | 7 | | { |
| | 8 | | private const byte Mask = 128 - 1; |
| | 9 | |
|
| | 10 | | public static long SetDynamicUInt32(this ArrayBase<byte> data, long i, uint value) |
| 3270 | 11 | | { |
| 3270 | 12 | | var d0 = (byte)(value & Mask); |
| 3270 | 13 | | value >>= 7; |
| 3270 | 14 | | if (value == 0) |
| 2535 | 15 | | { |
| 2535 | 16 | | data[i] = d0; |
| 2535 | 17 | | return 1; |
| | 18 | | } |
| | 19 | |
|
| 735 | 20 | | d0 += 128; |
| 735 | 21 | | var d1 = (byte)(value & Mask); |
| 735 | 22 | | value >>= 7; |
| 735 | 23 | | if (value == 0) |
| 684 | 24 | | { |
| 684 | 25 | | data[i] = d0; |
| 684 | 26 | | data[i + 1] = d1; |
| 684 | 27 | | return 2; |
| | 28 | | } |
| | 29 | |
|
| 51 | 30 | | d1 += 128; |
| 51 | 31 | | var d2 = (byte)(value & Mask); |
| 51 | 32 | | value >>= 7; |
| 51 | 33 | | if (value == 0) |
| 49 | 34 | | { |
| 49 | 35 | | data[i] = d0; |
| 49 | 36 | | data[i + 1] = d1; |
| 49 | 37 | | data[i + 2] = d2; |
| 49 | 38 | | return 3; |
| | 39 | | } |
| | 40 | |
|
| 2 | 41 | | d2 += 128; |
| 2 | 42 | | var d3 = (byte)(value & Mask); |
| 2 | 43 | | value >>= 7; |
| 2 | 44 | | if (value == 0) |
| 1 | 45 | | { |
| 1 | 46 | | data[i] = d0; |
| 1 | 47 | | data[i + 1] = d1; |
| 1 | 48 | | data[i + 2] = d2; |
| 1 | 49 | | data[i + 3] = d3; |
| 1 | 50 | | return 4; |
| | 51 | | } |
| | 52 | |
|
| 1 | 53 | | d3 += 128; |
| 1 | 54 | | var d4 = (byte)(value & Mask); |
| 1 | 55 | | data[i] = d0; |
| 1 | 56 | | data[i + 1] = d1; |
| 1 | 57 | | data[i + 2] = d2; |
| 1 | 58 | | data[i + 3] = d3; |
| 1 | 59 | | data[i + 4] = d4; |
| 1 | 60 | | return 5; |
| 3270 | 61 | | } |
| | 62 | |
|
| | 63 | | public static long SetDynamicUInt64(this ArrayBase<byte> data, long i, ulong value) |
| 24 | 64 | | { |
| 24 | 65 | | var d0 = (byte)(value & Mask); |
| 24 | 66 | | value >>= 7; |
| 24 | 67 | | if (value == 0) |
| 4 | 68 | | { |
| 4 | 69 | | data[i] = d0; |
| 4 | 70 | | return 1; |
| | 71 | | } |
| | 72 | |
|
| 20 | 73 | | d0 += 128; |
| 20 | 74 | | var d1 = (byte)(value & Mask); |
| 20 | 75 | | value >>= 7; |
| 20 | 76 | | if (value == 0) |
| 1 | 77 | | { |
| 1 | 78 | | data[i] = d0; |
| 1 | 79 | | data[i + 1] = d1; |
| 1 | 80 | | return 2; |
| | 81 | | } |
| | 82 | |
|
| 19 | 83 | | d1 += 128; |
| 19 | 84 | | var d2 = (byte)(value & Mask); |
| 19 | 85 | | value >>= 7; |
| 19 | 86 | | if (value == 0) |
| 1 | 87 | | { |
| 1 | 88 | | data[i] = d0; |
| 1 | 89 | | data[i + 1] = d1; |
| 1 | 90 | | data[i + 2] = d2; |
| 1 | 91 | | return 3; |
| | 92 | | } |
| | 93 | |
|
| 18 | 94 | | d2 += 128; |
| 18 | 95 | | var d3 = (byte)(value & Mask); |
| 18 | 96 | | value >>= 7; |
| 18 | 97 | | if (value == 0) |
| 1 | 98 | | { |
| 1 | 99 | | data[i] = d0; |
| 1 | 100 | | data[i + 1] = d1; |
| 1 | 101 | | data[i + 2] = d2; |
| 1 | 102 | | data[i + 3] = d3; |
| 1 | 103 | | return 4; |
| | 104 | | } |
| | 105 | |
|
| 17 | 106 | | d3 += 128; |
| 17 | 107 | | var d4 = (byte)(value & Mask); |
| 17 | 108 | | value >>= 7; |
| 17 | 109 | | if (value == 0) |
| 1 | 110 | | { |
| 1 | 111 | | data[i] = d0; |
| 1 | 112 | | data[i + 1] = d1; |
| 1 | 113 | | data[i + 2] = d2; |
| 1 | 114 | | data[i + 3] = d3; |
| 1 | 115 | | data[i + 4] = d4; |
| 1 | 116 | | return 5; |
| | 117 | | } |
| | 118 | |
|
| 16 | 119 | | d4 += 128; |
| 16 | 120 | | var d5 = (byte)(value & Mask); |
| 16 | 121 | | value >>= 7; |
| 16 | 122 | | if (value == 0) |
| 1 | 123 | | { |
| 1 | 124 | | data[i] = d0; |
| 1 | 125 | | data[i + 1] = d1; |
| 1 | 126 | | data[i + 2] = d2; |
| 1 | 127 | | data[i + 3] = d3; |
| 1 | 128 | | data[i + 4] = d4; |
| 1 | 129 | | data[i + 5] = d5; |
| 1 | 130 | | return 6; |
| | 131 | | } |
| | 132 | |
|
| 15 | 133 | | d5 += 128; |
| 15 | 134 | | var d6 = (byte)(value & Mask); |
| 15 | 135 | | value >>= 7; |
| 15 | 136 | | if (value == 0) |
| 1 | 137 | | { |
| 1 | 138 | | data[i] = d0; |
| 1 | 139 | | data[i + 1] = d1; |
| 1 | 140 | | data[i + 2] = d2; |
| 1 | 141 | | data[i + 3] = d3; |
| 1 | 142 | | data[i + 4] = d4; |
| 1 | 143 | | data[i + 5] = d5; |
| 1 | 144 | | data[i + 6] = d6; |
| 1 | 145 | | return 7; |
| | 146 | | } |
| | 147 | |
|
| 14 | 148 | | d6 += 128; |
| 14 | 149 | | var d7 = (byte)(value & Mask); |
| 14 | 150 | | value >>= 7; |
| 14 | 151 | | if (value == 0) |
| 0 | 152 | | { |
| 0 | 153 | | data[i] = d0; |
| 0 | 154 | | data[i + 1] = d1; |
| 0 | 155 | | data[i + 2] = d2; |
| 0 | 156 | | data[i + 3] = d3; |
| 0 | 157 | | data[i + 4] = d4; |
| 0 | 158 | | data[i + 5] = d5; |
| 0 | 159 | | data[i + 6] = d6; |
| 0 | 160 | | data[i + 7] = d7; |
| 0 | 161 | | return 8; |
| | 162 | | } |
| | 163 | |
|
| 14 | 164 | | d7 += 128; |
| 14 | 165 | | var d8 = (byte)(value & Mask); |
| 14 | 166 | | value >>= 7; |
| 14 | 167 | | if (value == 0) |
| 13 | 168 | | { |
| 13 | 169 | | data[i] = d0; |
| 13 | 170 | | data[i + 1] = d1; |
| 13 | 171 | | data[i + 2] = d2; |
| 13 | 172 | | data[i + 3] = d3; |
| 13 | 173 | | data[i + 4] = d4; |
| 13 | 174 | | data[i + 5] = d5; |
| 13 | 175 | | data[i + 6] = d6; |
| 13 | 176 | | data[i + 7] = d7; |
| 13 | 177 | | data[i + 8] = d8; |
| 13 | 178 | | return 9; |
| | 179 | | } |
| | 180 | |
|
| 1 | 181 | | d8 += 128; |
| 1 | 182 | | var d9 = (byte)(value & Mask); |
| 1 | 183 | | data[i] = d0; |
| 1 | 184 | | data[i + 1] = d1; |
| 1 | 185 | | data[i + 2] = d2; |
| 1 | 186 | | data[i + 3] = d3; |
| 1 | 187 | | data[i + 4] = d4; |
| 1 | 188 | | data[i + 5] = d5; |
| 1 | 189 | | data[i + 6] = d6; |
| 1 | 190 | | data[i + 7] = d7; |
| 1 | 191 | | data[i + 8] = d8; |
| 1 | 192 | | data[i + 9] = d9; |
| 1 | 193 | | return 10; |
| 24 | 194 | | } |
| | 195 | |
|
| | 196 | | public static long GetDynamicUInt32(this ArrayBase<byte> data, long i, out uint value) |
| 8186 | 197 | | { |
| 8186 | 198 | | if (i >= data.Length) throw new ArgumentOutOfRangeException(nameof(i)); |
| | 199 | |
|
| 8186 | 200 | | var d = data[i]; |
| 8186 | 201 | | if (d < 128) |
| 7245 | 202 | | { |
| 7245 | 203 | | value = d; |
| 7245 | 204 | | return 1; |
| | 205 | | } |
| | 206 | |
|
| 941 | 207 | | value = (uint)d - 128; |
| 941 | 208 | | d = data[i + 1]; |
| 941 | 209 | | if (d < 128) |
| 880 | 210 | | { |
| 880 | 211 | | value += (uint)d << 7; |
| 880 | 212 | | return 2; |
| | 213 | | } |
| | 214 | |
|
| 61 | 215 | | d -= 128; |
| 61 | 216 | | value += (uint)d << 7; |
| 61 | 217 | | d = data[i + 2]; |
| 61 | 218 | | if (d < 128) |
| 59 | 219 | | { |
| 59 | 220 | | value += (uint)d << 14; |
| 59 | 221 | | return 3; |
| | 222 | | } |
| | 223 | |
|
| 2 | 224 | | d -= 128; |
| 2 | 225 | | value += (uint)d << 14; |
| 2 | 226 | | d = data[i + 3]; |
| 2 | 227 | | if (d < 128) |
| 1 | 228 | | { |
| 1 | 229 | | value += (uint)d << 21; |
| 1 | 230 | | return 4; |
| | 231 | | } |
| | 232 | |
|
| 1 | 233 | | d -= 128; |
| 1 | 234 | | value += (uint)d << 21; |
| 1 | 235 | | d = data[i + 4]; |
| 1 | 236 | | value += (uint)d << 28; |
| 1 | 237 | | return 5; |
| 8186 | 238 | | } |
| | 239 | |
|
| | 240 | | public static long GetDynamicUInt64(this ArrayBase<byte> data, long i, out ulong value) |
| 2315 | 241 | | { |
| 2315 | 242 | | if (i >= data.Length) throw new ArgumentOutOfRangeException(nameof(i)); |
| | 243 | |
|
| 2315 | 244 | | var d = data[i]; |
| 2315 | 245 | | if (d < 128) |
| 2294 | 246 | | { |
| 2294 | 247 | | value = d; |
| 2294 | 248 | | return 1; |
| | 249 | | } |
| | 250 | |
|
| 21 | 251 | | value = (ulong)d - 128; |
| 21 | 252 | | d = data[i + 1]; |
| 21 | 253 | | if (d < 128) |
| 1 | 254 | | { |
| 1 | 255 | | value += (uint)d << 7; |
| 1 | 256 | | return 2; |
| | 257 | | } |
| | 258 | |
|
| 20 | 259 | | d -= 128; |
| 20 | 260 | | value += (ulong)d << 7; |
| 20 | 261 | | d = data[i + 2]; |
| 20 | 262 | | if (d < 128) |
| 1 | 263 | | { |
| 1 | 264 | | value += (uint)d << 14; |
| 1 | 265 | | return 3; |
| | 266 | | } |
| | 267 | |
|
| 19 | 268 | | d -= 128; |
| 19 | 269 | | value += (ulong)d << 14; |
| 19 | 270 | | d = data[i + 3]; |
| 19 | 271 | | if (d < 128) |
| 1 | 272 | | { |
| 1 | 273 | | value += (ulong)d << 21; |
| 1 | 274 | | return 4; |
| | 275 | | } |
| | 276 | |
|
| 18 | 277 | | d -= 128; |
| 18 | 278 | | value += (ulong)d << 21; |
| 18 | 279 | | d = data[i + 4]; |
| 18 | 280 | | if (d < 128) |
| 1 | 281 | | { |
| 1 | 282 | | value += (ulong)d << 28; |
| 1 | 283 | | return 5; |
| | 284 | | } |
| | 285 | |
|
| 17 | 286 | | d -= 128; |
| 17 | 287 | | value += (ulong)d << 28; |
| 17 | 288 | | d = data[i + 5]; |
| 17 | 289 | | if (d < 128) |
| 1 | 290 | | { |
| 1 | 291 | | value += (ulong)d << 35; |
| 1 | 292 | | return 6; |
| | 293 | | } |
| | 294 | |
|
| 16 | 295 | | d -= 128; |
| 16 | 296 | | value += (ulong)d << 35; |
| 16 | 297 | | d = data[i + 6]; |
| 16 | 298 | | if (d < 128) |
| 1 | 299 | | { |
| 1 | 300 | | value += (ulong)d << 42; |
| 1 | 301 | | return 7; |
| | 302 | | } |
| | 303 | |
|
| 15 | 304 | | d -= 128; |
| 15 | 305 | | value += (ulong)d << 42; |
| 15 | 306 | | d = data[i + 7]; |
| 15 | 307 | | if (d < 128) |
| 0 | 308 | | { |
| 0 | 309 | | value += (ulong)d << 49; |
| 0 | 310 | | return 8; |
| | 311 | | } |
| | 312 | |
|
| 15 | 313 | | d -= 128; |
| 15 | 314 | | value += (ulong)d << 49; |
| 15 | 315 | | d = data[i + 8]; |
| 15 | 316 | | if (d < 128) |
| 14 | 317 | | { |
| 14 | 318 | | value += (ulong)d << 56; |
| 14 | 319 | | return 9; |
| | 320 | | } |
| | 321 | |
|
| 1 | 322 | | d -= 128; |
| 1 | 323 | | value += (ulong)d << 56; |
| 1 | 324 | | d = data[i + 9]; |
| 1 | 325 | | value += (ulong)d << 63; |
| 1 | 326 | | return 10; |
| 2315 | 327 | | } |
| | 328 | |
|
| | 329 | | public static uint ToUnsigned(int value) |
| 727 | 330 | | { |
| 727 | 331 | | var unsigned = (uint)value; |
| 727 | 332 | | if (value < 0) |
| 291 | 333 | | { |
| 291 | 334 | | unsigned = (uint)-value; |
| 291 | 335 | | } |
| | 336 | |
|
| 727 | 337 | | unsigned <<= 1; |
| 727 | 338 | | if (value < 0) |
| 291 | 339 | | { |
| 291 | 340 | | unsigned += 1; |
| 291 | 341 | | } |
| | 342 | |
|
| 727 | 343 | | return unsigned; |
| 727 | 344 | | } |
| | 345 | |
|
| | 346 | | public static int FromUnsigned(uint unsigned) |
| 956 | 347 | | { |
| 956 | 348 | | var sign = unsigned & (uint)1; |
| | 349 | |
|
| 956 | 350 | | var value = (int)(unsigned >> 1); |
| 956 | 351 | | if (sign == 1) |
| 334 | 352 | | { |
| 334 | 353 | | value = -value; |
| 334 | 354 | | } |
| | 355 | |
|
| 956 | 356 | | return value; |
| 956 | 357 | | } |
| | 358 | |
|
| | 359 | | public static long SetGuid(this ArrayBase<byte> data, long i, Guid value) |
| 2 | 360 | | { |
| 2 | 361 | | var bytes = value.ToByteArray(); |
| 68 | 362 | | for (var b = 0; b < 16; b++) |
| 32 | 363 | | { |
| 32 | 364 | | data[i + b] = bytes[b]; |
| 32 | 365 | | } |
| | 366 | |
|
| 2 | 367 | | return 16; |
| 2 | 368 | | } |
| | 369 | |
|
| | 370 | | public static long GetGuid(this ArrayBase<byte> data, long i, out Guid value) |
| 0 | 371 | | { |
| 0 | 372 | | var bytes = new byte[16]; |
| 0 | 373 | | for (var b = 0; b < 16; b++) |
| 0 | 374 | | { |
| 0 | 375 | | bytes[b] = data[i + b]; |
| 0 | 376 | | } |
| | 377 | |
|
| 0 | 378 | | value = new Guid(bytes); |
| 0 | 379 | | return 16; |
| 0 | 380 | | } |
| | 381 | |
|
| | 382 | | public static long SetDynamicInt32(this ArrayBase<byte> data, long i, int value) |
| 727 | 383 | | { |
| 727 | 384 | | return data.SetDynamicUInt32(i, ToUnsigned(value)); |
| 727 | 385 | | } |
| | 386 | |
|
| | 387 | | public static long GetDynamicInt32(this ArrayBase<byte> data, long i, out int value) |
| 956 | 388 | | { |
| 956 | 389 | | if (i >= data.Length) throw new ArgumentOutOfRangeException(nameof(i)); |
| | 390 | |
|
| 956 | 391 | | var c = data.GetDynamicUInt32(i, out var unsigned); |
| 956 | 392 | | value = FromUnsigned(unsigned); |
| 956 | 393 | | return c; |
| 956 | 394 | | } |
| | 395 | |
|
| | 396 | | public static ulong ToUnsigned(long value) |
| 2 | 397 | | { |
| 2 | 398 | | var unsigned = (ulong)value; |
| 2 | 399 | | if (value < 0) |
| 0 | 400 | | { |
| 0 | 401 | | unsigned = (ulong)-value; |
| 0 | 402 | | } |
| | 403 | |
|
| 2 | 404 | | unsigned <<= 1; |
| 2 | 405 | | if (value < 0) |
| 0 | 406 | | { |
| 0 | 407 | | unsigned += 1; |
| 0 | 408 | | } |
| | 409 | |
|
| 2 | 410 | | return unsigned; |
| 2 | 411 | | } |
| | 412 | |
|
| | 413 | | public static long FromUnsigned(ulong unsigned) |
| 2 | 414 | | { |
| 2 | 415 | | var sign = unsigned & (ulong)1; |
| | 416 | |
|
| 2 | 417 | | var value = (long)(unsigned >> 1); |
| 2 | 418 | | if (sign == 1) |
| 0 | 419 | | { |
| 0 | 420 | | value = -value; |
| 0 | 421 | | } |
| | 422 | |
|
| 2 | 423 | | return value; |
| 2 | 424 | | } |
| | 425 | |
|
| | 426 | | public static long SetDynamicInt64(this ArrayBase<byte> data, long i, long value) |
| 2 | 427 | | { |
| 2 | 428 | | return data.SetDynamicUInt64(i, ToUnsigned(value)); |
| 2 | 429 | | } |
| | 430 | |
|
| | 431 | | public static long GetDynamicInt64(this ArrayBase<byte> data, long i, out long value) |
| 2 | 432 | | { |
| 2 | 433 | | var c = data.GetDynamicUInt64(i, out var unsigned); |
| 2 | 434 | | value = FromUnsigned(unsigned); |
| 2 | 435 | | return c; |
| 2 | 436 | | } |
| | 437 | |
|
| | 438 | | public static long SetDynamicUInt32Nullable(this ArrayBase<byte> data, long i, uint? value) |
| 570 | 439 | | { |
| 570 | 440 | | value = value == null ? 0 : value + 1; |
| 570 | 441 | | return data.SetDynamicUInt32(i, value.Value); |
| 570 | 442 | | } |
| | 443 | |
|
| | 444 | | public static long GetDynamicUInt32Nullable(this ArrayBase<byte> data, long i, out uint? value) |
| 2304 | 445 | | { |
| 2304 | 446 | | var c = data.GetDynamicUInt32(i, out var unsigned); |
| 2304 | 447 | | value = unsigned == 0 ? null : (uint?)unsigned - 1; |
| 2304 | 448 | | return c; |
| 2304 | 449 | | } |
| | 450 | |
|
| | 451 | | public static void SetFixed(this ArrayBase<byte> data, long i, int bytes, int value) |
| 907 | 452 | | { |
| 7180 | 453 | | for (var b = 0; b < bytes; b++) |
| 2683 | 454 | | { |
| 2683 | 455 | | data[i + b] = (byte)(value & byte.MaxValue); |
| 2683 | 456 | | value >>= 8; |
| 2683 | 457 | | } |
| 907 | 458 | | } |
| | 459 | |
|
| | 460 | | public static void GetFixed(this ArrayBase<byte> data, long i, int bytes, out int value) |
| 1410 | 461 | | { |
| 1410 | 462 | | value = 0; |
| 11186 | 463 | | for (var b = 0; b < bytes; b++) |
| 4183 | 464 | | { |
| 4183 | 465 | | value += data[i + b] << (b * 8); |
| 4183 | 466 | | } |
| 1410 | 467 | | } |
| | 468 | | } |