Add xxhash

third_party/xxhash/tests/multiInclude.c

@@ -0,0 +1,78 @@
+/*
+ * Multi-include test program
+ * Validates that xxhash.h can be included multiple times and in any order
+ *
+ * Copyright (C) 2020 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
+ */
+
+#include <stdio.h>   /* printf */
+
+/* Normal include, gives access to public symbols */
+#include "../xxhash.h"
+
+/* Multiple consecutive inclusions are handled properly. */
+#include "../xxhash.h"
+
+/*
+ * Advanced include, gives access to experimental symbols
+ * This test ensures that xxhash.h can be included multiple times
+ * and in any order. The tested order is more difficult:
+ * without care, the declaration of experimental symbols could be skipped.
+ */
+#define XXH_STATIC_LINKING_ONLY
+#include "../xxhash.h"
+
+/*
+ * Inlining: redefine all identifiers, keep them private to the unit.
+ * Note: Without specific efforts, the identifier names would collide.
+ *
+ * To be linked with and without xxhash.o
+ * to test the symbol's presence and naming collisions.
+ */
+#define XXH_INLINE_ALL
+#include "../xxhash.h"
+
+/*
+ * Multiple consecutive inclusions with XXH_INLINE_ALL are handled properly.
+ */
+#define XXH_INLINE_ALL
+#include "../xxhash.h"
+
+
+void hash_advanced(void)
+{
+    XXH3_state_t state;   /* this type is part of experimental API */
+
+    XXH3_64bits_reset(&state);
+    const char input[] = "Hello World !";
+
+    XXH3_64bits_update(&state, input, sizeof(input));
+
+    XXH64_hash_t const h = XXH3_64bits_digest(&state);
+    printf("hash '%s': %08x%08x \n", input, (unsigned)(h >> 32), (unsigned)h);
+}
+
+int main(void)
+{
+    hash_advanced();
+}