c sqlite...

#define DATABASE "drurmu.db"
#define READ 0x1
#define WRITE 0x2
#define EXEC 0x0
#define VALUE 0x6

#define INT32 0x10
#define STR 0x20

int32_t sqlite3_open_database(sqlite3 **sqlite) {
    
  int32_t ret = sqlite3_open(DATABASE, sqlite);
  if (ret != SQLITE_OK) {
    
    printf("[USER DEBUG] sqlite3-> %s \n", sqlite3_errstr(ret));
    return ret;
  }
  return SQLITE_OK;
}

int32_t sqlite3_exec_sql(sqlite3 *sqlite, int32_t mode, const char *sql,
                         void *value, int32_t _s) {
    
  sqlite3_stmt *stmt = NULL;
  int32_t ret = sqlite3_prepare_v2(sqlite, sql, strlen(sql), &stmt, NULL);
  if (ret != SQLITE_OK) {
    
    printf("[USER DEBUG] sqlite3-> %s \n", sqlite3_errstr(ret));
    return ret;
  }

  switch (mode & 0xF) {
    
  case EXEC:
    if (sqlite3_step(stmt) == SQLITE_OK) {
    
      return SQLITE_OK;
    }
  case READ:
    if (sqlite3_step(stmt) == SQLITE_ROW) {
    
      if ((mode & 0xF0) == INT32) {
    
        *(int32_t *)value = sqlite3_column_int(stmt, VALUE);
      } else if ((mode & 0xF0) == STR) {
    
        int32_t size = strlen((const char *)sqlite3_column_text(stmt, VALUE));
        if (value == NULL && _s < size) {
    
          sqlite3_finalize(stmt);
          return -3;
        }
        memcpy((char *)value, sqlite3_column_text(stmt, VALUE), size);
      }
    } else {
    
      sqlite3_finalize(stmt);
      return -5;
    }
    sqlite3_finalize(stmt);
    return SQLITE_OK;
  case WRITE:
    if (sqlite3_step(stmt) == SQLITE_OK) {
    
      return SQLITE_OK;
    } else {
    
      return -2;
    }
  default:
    return -1;
  }
  return SQLITE_OK;
}

int32_t main(void) {
    
  sqlite3 *sqlite;
  int32_t ret = sqlite3_open_database(&sqlite);
  if (ret != SQLITE_OK) {
    
    printf("[USER DEBUG] sqlite3 open database error-> %s\n",
           sqlite3_errstr(ret));
    return -1;
  }

  char select[] = "select * from rmu where ID=\'0x0007\'";
  char str[255];
  bzero(str, 255);
  sqlite3_exec_sql(sqlite, READ | STR, select, (void *)str, 255);
  printf("%s\n", str);
  int32_t INT;
  bzero(select, strlen(select));
  sprintf(select, "select * from rmu where ID=\'0x0002\'");
  sqlite3_exec_sql(sqlite, READ | INT32, select, (void *)&INT, 0);
  printf("%d\n", INT);
  char add[] = "insert into rmu VALUES(\'0x1234\','hello "
               "world','RW','uint1',1,20,0,0,0,0)";
  sqlite3_exec_sql(sqlite, WRITE, add, NULL, 0);
  return 0;
}