Make 64bit fnv optional.

[awesomized/libmemcached] / libhashkit / has.cc

diff --git a/libhashkit/has.cc b/libhashkit/has.cc
new file mode 100644 (file)
index 0000000..111e715
--- /dev/null
+++ b/libhashkit/has.cc
@@ -0,0 +1,79 @@
+/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
+ * 
+ *  Libmemcached library
+ *
+ *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are
+ *  met:
+ *
+ *      * Redistributions of source code must retain the above copyright
+ *  notice, this list of conditions and the following disclaimer.
+ *
+ *      * Redistributions in binary form must reproduce the above
+ *  copyright notice, this list of conditions and the following disclaimer
+ *  in the documentation and/or other materials provided with the
+ *  distribution.
+ *
+ *      * The names of its contributors may not be used to endorse or
+ *  promote products derived from this software without specific prior
+ *  written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <libhashkit/common.h>
+
+bool libhashkit_has_algorithm(const hashkit_hash_algorithm_t algo)
+{
+  switch (algo)
+  {
+  case HASHKIT_HASH_FNV1_64:
+  case HASHKIT_HASH_FNV1A_64:
+#if __WORDSIZE == 64 && defined(HAVE_FNV64_HASH)
+    return true;
+#else
+    return false;
+#endif
+
+  case HASHKIT_HASH_HSIEH:
+#ifdef HAVE_HSIEH_HASH
+    return true;
+#else
+    return false;
+#endif
+
+  case HASHKIT_HASH_MURMUR:
+#ifdef HAVE_MURMUR_HASH
+    return true;
+#else
+    return false;
+#endif
+
+  case HASHKIT_HASH_FNV1_32:
+  case HASHKIT_HASH_FNV1A_32:
+  case HASHKIT_HASH_DEFAULT:
+  case HASHKIT_HASH_MD5:
+  case HASHKIT_HASH_CRC:
+  case HASHKIT_HASH_JENKINS:
+  case HASHKIT_HASH_CUSTOM:
+    return true;
+
+  case HASHKIT_HASH_MAX:
+    break;
+  }
+
+  return false;
+}