72 lines
3.3 KiB
C++
72 lines
3.3 KiB
C++
/**
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@file Crypto.cpp
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@author Morgan McGuire, http://graphics.cs.williams.edu
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@created 2006-03-28
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@edited 2006-04-06
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*/
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#include "G3D/platform.h"
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#include "G3D/Crypto.h"
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#include "G3D/g3dmath.h"
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#include "zlib.h"
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namespace G3D {
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int Crypto::smallPrime(int n) {
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debugAssert(n < numSmallPrimes() && n >= 0);
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// From:
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// http://primes.utm.edu/lists/small/1000.txt
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static const int table[] = {
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2, 3, 5, 7, 11, 13, 17, 19, 23, 29,
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31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
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73, 79, 83, 89, 97, 101, 103, 107, 109, 113,
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127, 131, 137, 139, 149, 151, 157, 163, 167, 173,
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179, 181, 191, 193, 197, 199, 211, 223, 227, 229,
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233, 239, 241, 251, 257, 263, 269, 271, 277, 281,
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283, 293, 307, 311, 313, 317, 331, 337, 347, 349,
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353, 359, 367, 373, 379, 383, 389, 397, 401, 409,
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419, 421, 431, 433, 439, 443, 449, 457, 461, 463,
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467, 479, 487, 491, 499, 503, 509, 521, 523, 541,
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547, 557, 563, 569, 571, 577, 587, 593, 599, 601,
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607, 613, 617, 619, 631, 641, 643, 647, 653, 659,
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661, 673, 677, 683, 691, 701, 709, 719, 727, 733,
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739, 743, 751, 757, 761, 769, 773, 787, 797, 809,
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811, 821, 823, 827, 829, 839, 853, 857, 859, 863,
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877, 881, 883, 887, 907, 911, 919, 929, 937, 941,
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947, 953, 967, 971, 977, 983, 991, 997, 1009, 1013,
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1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069,
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1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151,
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1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223,
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1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291,
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1297, 1301, 1303, 1307, 1319, 1321, 1327, 1361, 1367, 1373,
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1381, 1399, 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451,
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1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499, 1511,
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1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583,
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1597, 1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657,
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1663, 1667, 1669, 1693, 1697, 1699, 1709, 1721, 1723, 1733,
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1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811,
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1823, 1831, 1847, 1861, 1867, 1871, 1873, 1877, 1879, 1889,
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1901, 1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979, 1987,
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1993, 1997, 1999};
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return table[n];
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}
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int Crypto::numSmallPrimes() {
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return 303;
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}
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uint32 Crypto::crc32(const void* byte, size_t numBytes) {
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alwaysAssertM(numBytes < 0xFFFFFFFF, "Not implemented for arrays larger than 2^32 bytes");
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return ::crc32(::crc32(0, Z_NULL, 0), static_cast<const Bytef *>(byte), (int)numBytes);
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}
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} // G3D
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