upd: designed database

backend/include/bs-utility.h

@@ -119,4 +119,25 @@ class UserItemClass {
   char user_id[31], password[31], user_name[31];
   unsigned char privilege;
 };
+
+class BookItemClass {
+ public:
+  char ISBN[21], name[61], author[61], keyword[61];
+  double price;
+  int quantity_remain;
+};
+
+class FinanceItemClass {
+ public:
+  int book_id;
+  int quantity;
+  double total_price;
+};
+
+class OperationLogItemClass {
+ public:
+  char user_id[31];
+  char command[256];
+  int fid;
+};
 #endif  // PROTECTOR_UTILITY_H

backend/include/database.h

@@ -17,12 +17,13 @@ class UserDataBase {
   bool PAM(const std::string &user_id, const std::string &password);
 };
 class BookDataBase {
-  ;
+  DriveArray<BookItemClass> full_book_data;
+  String2Index indexer;
+  String2Index keyword2index;
 };
-class FinanceDataBase {
-  ;
-};
-class OperationLogDataBase {
-  ;
+class LogDataBase {
+  DriveArray<FinanceItemClass> finance_data;
+  DriveArray<OperationLogItemClass> operation_log_data;
 };
+
 #endif  // PROTECTOR_DATABASE_HPP