1 files changed, 31 insertions, 0 deletions
diff --git a/src/util/fnv.h b/src/util/fnv.h
new file mode 100644
index 0000000..534063d
--- /dev/null
+++ b/src/util/fnv.h
@@ -0,0 +1,31 @@
+#pragma once
+#include "typedef.h"
+
+typedef U32 FNV1A;
+
+enum : FNV1A {
+  FNV1A_PRIME = 0x1000193,
+  FNV1A_BASIS = 0x811C9DC5
+};
+
+inline constexpr U32 strlen_ct( const char* str ) {
+  U32 s = 0;
+  for( ; !!str[s]; ++s );
+
+  return s;
+}
+
+inline constexpr FNV1A fnv1a( const U8* data, const U32 size ) {
+  FNV1A out = FNV1A_BASIS;
+
+  for( U32 i = 0; i < size; ++i )
+    out = ( out ^ data[i] ) * FNV1A_PRIME;
+
+  return out;
+}
+
+inline constexpr FNV1A fnv1a( const char* str ) {
+  U32 len = strlen_ct( str );
+
+  return fnv1a( (const U8*)str, len );
+}