整理代码

util/xpack/sqlite.h

@@ -0,0 +1,44 @@
+/*
+* Copyright (C) 2021 Duowan Inc. All rights reserved.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#ifndef __X_PACK_SQLITE_H
+#define __X_PACK_SQLITE_H
+
+#include "sqlite_decoder.h"
+#include "xpack.h"
+
+namespace xpack {
+
+class sqlite {
+public:
+    // convert result of sqlite_get_table to a struct or vector<struct>
+    template <class T>
+    static void decode(const char **result, int rows, int cols, T &val) {
+        SQLiteDecoder de(result, rows, cols);
+        de.decode_top(val, NULL);
+    }
+
+    // select name from test where id = 1; // just want to get name, did not want to use a struct
+    template <class T>
+    static void decode(const char **result, int rows, int cols, const std::string&field, T &val) {
+        SQLiteDecoder de(result, rows, cols);
+        de.decode_column(field.c_str(), val, NULL);
+    }
+};
+
+}
+
+#endif