1 files changed, 46 insertions, 0 deletions
diff --git a/dep/include/g3dlite/G3D/Crypto.h b/dep/include/g3dlite/G3D/Crypto.h
new file mode 100644
index 00000000000..f4e7bfad6cd
--- /dev/null
+++ b/dep/include/g3dlite/G3D/Crypto.h
@@ -0,0 +1,46 @@
+/** 
+  @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