1 files changed, 37 insertions, 0 deletions
diff --git a/src/common/include/algo.h b/src/common/include/algo.h
new file mode 100644
index 0000000..80af052
--- /dev/null
+++ b/src/common/include/algo.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#define MIN(a, b)   ((a)<(b)?(a):(b))
+#define MAX(a, b)   ((a)>(b)?(a):(b))
+#define ABS(a)		((a)<0?-(a):(a))
+
+// ============================================================= //
+// FUNCTION TYPES FOR KEY-VALUE DATA STRUCTURES (HASHTBL, BTREE) //
+
+typedef uint32_t hash_t;
+typedef hash_t (*hash_fun_t)(const void*);
+
+typedef int (*key_cmp_fun_t)(const void*, const void*);
+typedef bool (*key_eq_fun_t)(const void*, const void*);
+
+typedef void (*kv_iter_fun_t)(void* key, void* value);
+
+// void* is considered as an unsigned integer (and not a pointer)
+hash_t id_hash_fun(const void* v);
+bool id_key_eq_fun(const void* a, const void* b);
+int id_key_cmp_fun(const void* a, const void* b);
+
+// void* considered as char*
+hash_t str_hash_fun(const void* v);
+bool str_key_eq_fun(const void* a, const void* b);
+int str_key_cmp_fun(const void* a, const void* b);
+
+// Freeing functions (they are of type kv_iter_fun_t)
+void free_key(void* key, void* val);
+void free_val(void* key, void* val);
+void free_key_val(void* key, void* val);
+
+/* vim: set ts=4 sw=4 tw=0 noet :*/