Use hash algorithm name in its function's symbol

hash.cpp

@@ -20,9 +20,8 @@
 #include "hash.hpp"
 
 
-// Thomas Wang's 32 bit mixing function
 uint32_t
-hash (uint32_t key) {
+util::wang32 (uint32_t key) {
   uint32_t c2 = 0x27d4eb2d; // a prime or an odd constant
   key = (key ^ 61) ^ (key >> 16);
   key = key + (key << 3);
@@ -33,9 +32,8 @@ hash (uint32_t key) {
 }
 
 
-// Thomas Wang's 64 bit mixing function
 uint64_t
-hash (uint64_t key) {
+util::wang64 (uint64_t key) {
   key = (~key) + (key << 21); // key = (key << 21) - key - 1;
   key = key ^ (key >> 24);
   key = (key + (key << 3)) + (key << 8); // key * 265
@@ -48,6 +46,3 @@ hash (uint64_t key) {
 }
 
 
-uintptr_t
-hash (void *const key)
-    { return hash ((uintptr_t)key); }

hash.hpp

@@ -21,9 +21,24 @@
 #define __UTIL_HASH_HPP
 
 #include <cstdint>
+#include <cstdlib>
+
+// All hashes are unsuitable for cryptographic operations nnless noted.
+namespace util {
+    // Fast integer mixing operations by Thomas Wang.
+    uint32_t  wang32 (uint32_t key);
+    uint64_t  wang64 (uint64_t key);
+
+    // General hashes for when you really just don't care about implementation
+    inline uint32_t  hash (uint32_t key)    { return wang32 (key); }
+    inline uint64_t  hash (uint64_t key)    { return wang64 (key); }
+    inline uintptr_t hash (const void *key) {
+        return sizeof (uintptr_t) == 32 ? wang32 (reinterpret_cast<uintptr_t> (key)) :
+                                          wang64 (reinterpret_cast<uintptr_t> (key));
+    }
+}
+
+
 
-uint32_t hash (uint32_t key);
-uint64_t hash (uint64_t key);
-uintptr_t hash (void * const);
 
 #endif