medfall

commit 82b1a4aebdf03f84d54b7f3a66cf15d1a32a3314
parent 458ab5d362b839df6d94cea858dec1a2f3c88040
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Thu Sep 14 23:36:35 +0300

Add fnv.h

Diffstat:
fnv.h
 | 
20
++++++++++++++++++++
1 file changed, 20 insertions(+), 0 deletions(-)
diff --git a/fnv.h b/fnv.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include "intrinsics.h"
+#include "array.h"
+
+forceinline u64 fnv1a( const void * data, size_t n ) {
+	u64 hash = 14695981039346656037;
+	for( size_t i = 0; i < n; i++ ) {
+		hash = ( hash * 1099511628211 ) ^ data[ i ];
+	}
+	return hash;
+}
+
+forceinline u64 fnv1a( const array< u8 > a ) {
+	return fnv1a( a.ptr(), a.num_bytes() );
+}
+
+forceinline u64 fnv1a( u64 x ) {
+	return fnv1a( &x, sizeof( x ) );
+}