add unity testing fmwk and simple hash fn demonstrationHEADmaster

1 files changed, 22 insertions, 0 deletions

diff --git a/src/algo/hash.c b/src/algo/hash.c
new file mode 100644
index 0000000..c8ba66d
--- /dev/null
+++ b/src/algo/hash.c
@@ -0,0 +1,22 @@
+#include "hash.h"
+#include <stdint.h>
+
+uint64_t xor64_hash(uint64_t const *const bytes, size_t size) {
+  uint64_t result = 0;
+
+  while (size != 0) {
+    result ^= bytes[size - 1];
+    size--;
+  }
+
+  return result;
+}
+
+uint64_t djb2_hash(char const *const bytes, size_t size) {
+  uint64_t hash = 5381;
+  for (size_t i = 0; i < size; i++) {
+    hash = ((hash << 5) + hash) + bytes[i];
+  }
+
+  return hash;
+}