Add xxhash

third_party/xxhash/tests/collisions/hashes.h

@@ -0,0 +1,127 @@
+/*
+ * List of hashes for the brute force collision tester
+ * Part of xxHash project
+ * Copyright (C) 2019-2021 Yann Collet
+ *
+ * GPL v2 License
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * You can contact the author at:
+ * - xxHash homepage: https://www.xxhash.com
+ * - xxHash source repository: https://github.com/Cyan4973/xxHash
+ */
+
+#ifndef HASHES_H_1235465
+#define HASHES_H_1235465
+
+#include <stddef.h>      /* size_t */
+#include <stdint.h>      /* uint64_t */
+#define XXH_INLINE_ALL   /* XXH128_hash_t */
+#include "xxhash.h"
+
+
+/* return type */
+
+typedef union {
+    uint64_t       h64;
+    XXH128_hash_t h128;
+} UniHash;
+
+UniHash uniHash32(uint64_t v32)
+{   UniHash unih;
+    unih.h64 = v32;
+    return unih;
+}
+
+UniHash uniHash64(uint64_t v64)
+{   UniHash unih;
+    unih.h64 = v64;
+    return unih;
+}
+
+UniHash uniHash128(XXH128_hash_t v128)
+{   UniHash unih;
+    unih.h128 = v128;
+    return unih;
+}
+
+
+/* ===  xxHash  === */
+
+UniHash XXH3_wrapper (const void* data, size_t size)
+{
+    return uniHash64( XXH3_64bits(data, size) );
+}
+
+UniHash XXH128_wrapper (const void* data, size_t size)
+{
+    return uniHash128( XXH3_128bits(data, size) );
+}
+
+UniHash XXH128l_wrapper (const void* data, size_t size)
+{
+    return uniHash64( XXH3_128bits(data, size).low64 );
+}
+
+UniHash XXH128h_wrapper (const void* data, size_t size)
+{
+    return uniHash64( XXH3_128bits(data, size).high64 );
+}
+
+UniHash XXH64_wrapper (const void* data, size_t size)
+{
+    return uniHash64 ( XXH64(data, size, 0) );
+}
+
+UniHash XXH32_wrapper (const void* data, size_t size)
+{
+    return uniHash32( XXH32(data, size, 0) );
+}
+
+/* ===  Dummy integration example  === */
+
+#include "dummy.h"
+
+UniHash badsum32_wrapper (const void* data, size_t size)
+{
+    return uniHash32( badsum32(data, size, 0) );
+}
+
+
+
+/* ===  Table  === */
+
+typedef UniHash (*hashfn) (const void* data, size_t size);
+
+typedef struct {
+    const char* name;
+    hashfn fn;
+    int bits;
+} hashDescription;
+
+#define HASH_FN_TOTAL 7
+
+hashDescription hashfnTable[HASH_FN_TOTAL] = {
+    { "xxh3"  ,  XXH3_wrapper,     64 },
+    { "xxh64" ,  XXH64_wrapper,    64 },
+    { "xxh128",  XXH128_wrapper,  128 },
+    { "xxh128l", XXH128l_wrapper,  64 },
+    { "xxh128h", XXH128h_wrapper,  64 },
+    { "xxh32" ,  XXH32_wrapper,    32 },
+    { "badsum32",badsum32_wrapper, 32 },
+};
+
+#endif   /* HASHES_H_1235465 */