init(dbms): introduce Tanabata database management system (TDBMS)

Only basic database operations, only Unix domain sockets by now

include/tdbms-client.h

@@ -0,0 +1,27 @@
+// Tanabata DBMS client lib
+// By Masahiko AMANO aka H1K0
+
+#pragma once
+#ifndef TANABATA_DBMS_CLIENT_H
+#define TANABATA_DBMS_CLIENT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "tdbms.h"
+
+// Connect to TDBMS server
+int tdbms_connect(const char *domain, const char *addr);
+
+// Close connection to TDBMS server
+int tdbms_close(int socket_fd);
+
+// Execute a TDB request
+int tdb_query(int socket_fd, const char *db_name, char request_code, const char *request_body, char **response);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //TANABATA_DBMS_CLIENT_H

include/tdbms.h

@@ -0,0 +1,45 @@
+// Tanabata DBMS core names
+// By Masahiko AMANO aka H1K0
+
+#pragma once
+#ifndef TANABATA_DBMS_H
+#define TANABATA_DBMS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// TDBMS request codes
+enum TRC {
+    trc_db_stats = 0b0,
+    trc_db_init = 0b11,
+    trc_db_load = 0b10,
+    trc_db_save = 0b100,
+    trc_db_edit = 0b110,
+    trc_db_remove_soft = 0b1,
+    trc_db_remove_hard = 0b101,
+    trc_db_weed = 0b111,
+    trc_sasa_get = 0b10000,
+    trc_sasa_get_by_tanzaku = 0b101000,
+    trc_sasa_add = 0b10010,
+    trc_sasa_update = 0b10100,
+    trc_sasa_remove = 0b10001,
+    trc_tanzaku_get = 0b100000,
+    trc_tanzaku_get_by_sasa = 0b11000,
+    trc_tanzaku_add = 0b100010,
+    trc_tanzaku_update = 0b100100,
+    trc_tanzaku_remove = 0b100001,
+    trc_tanzaku_remove_by_sasa = 0b11001,
+    trc_kazari_get = 0b1000,
+    trc_kazari_add = 0b1010,
+    trc_kazari_add_single_sasa_to_multiple_tanzaku = 0b11010,
+    trc_kazari_add_single_tanzaku_to_multiple_sasa = 0b101010,
+    trc_kazari_update = 0b1100,
+    trc_kazari_remove = 0b1001,
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //TANABATA_DBMS_H