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/**
@file Crypto.h
@maintainer Morgan McGuire, matrix@graphics3d.com
@created 2006-03-29
@edited 2006-04-06
*/
#ifndef G3D_CRYPTO_H
#define G3D_CRYPTO_H
#include "G3D/platform.h"
#include "G3D/g3dmath.h"
#include <string>
namespace G3D {
/** Cryptography and hashing helper functions */
class Crypto {
public:
/**
Computes the CRC32 value of a byte array. CRC32 is designed to be a hash
function that produces different values for similar strings.
This implementation is compatible with PKZIP and GZIP.
Based on http://www.gamedev.net/reference/programming/features/crc32/
*/
static uint32 crc32(const void* bytes, size_t numBytes);
/**
Returns the nth prime less than 2000 in constant time. The first prime has index
0 and is the number 2.
*/
static int smallPrime(int n);
/** Returns 1 + the largest value that can be passed to smallPrime. */
static int numSmallPrimes();
};
}
#endif
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