core: implement string hashing using FNV-1a

core/hash.c

@@ -0,0 +1,16 @@
+#include <blue/core/hash.h>
+
+#define FNV1_OFFSET_BASIS 0xcbf29ce484222325
+#define FNV1_PRIME        0x100000001b3
+
+uint64_t b_hash_string(const char *s)
+{
+	uint64_t hash = FNV1_OFFSET_BASIS;
+
+	for (size_t i = 0; s[i]; i++) {
+		hash ^= s[i];
+		hash *= FNV1_PRIME;
+	}
+
+	return hash;
+}

core/include/blue/core/hash.h

@@ -0,0 +1,9 @@
+#ifndef BLUELIB_CORE_HASH_H_
+#define BLUELIB_CORE_HASH_H_
+
+#include <blue/core/misc.h>
+#include <stdint.h>
+
+BLUE_API uint64_t b_hash_string(const char *s);
+
+#endif