47 lines
975 B
C++
47 lines
975 B
C++
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/**
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@file Crypto.h
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@maintainer Morgan McGuire, [email protected]
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@created 2006-03-29
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@edited 2006-04-06
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*/
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#ifndef G3D_CRYPTO_H
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#define G3D_CRYPTO_H
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#include "G3D/platform.h"
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#include "G3D/g3dmath.h"
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#include <string>
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namespace G3D {
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/** Cryptography and hashing helper functions */
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class Crypto {
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public:
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/**
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Computes the CRC32 value of a byte array. CRC32 is designed to be a hash
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function that produces different values for similar strings.
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This implementation is compatible with PKZIP and GZIP.
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Based on http://www.gamedev.net/reference/programming/features/crc32/
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*/
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static uint32 crc32(const void* bytes, size_t numBytes);
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/**
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Returns the nth prime less than 2000 in constant time. The first prime has index
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0 and is the number 2.
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*/
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static int smallPrime(int n);
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/** Returns 1 + the largest value that can be passed to smallPrime. */
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static int numSmallPrimes();
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};
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}
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#endif
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