patch 4.0

unittest/storage/blocksstable/encoding/csv_data_reader.h

@@ -0,0 +1,54 @@
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#ifndef CSV_DATA_READER_H_
+#define CSV_DATA_READER_H_
+
+#include <vector>
+#include <string>
+#include <fstream>
+#include "share/ob_define.h"
+#include "lib/string/ob_string.h"
+
+namespace oceanbase
+{
+namespace blocksstable
+{
+
+class CSVDataReader
+{
+public:
+  CSVDataReader();
+  virtual ~CSVDataReader();
+  int init(const char *file);
+  int next_data(std::vector<common::ObString> &data);
+  int reset()
+  {
+    ifs_.clear();
+    ifs_.seekg(0, std::ios::beg);
+    return common::OB_SUCCESS;
+  }
+private:
+  int parse_line();
+private:
+  static const int64_t MAX_STR_LEN = 64L * 1024L;
+  char *buf_;
+  int64_t buf_size_;
+  std::string cur_line_;
+  std::vector<common::ObString> datas_;
+  std::ifstream ifs_;
+};
+
+}
+}
+
+#endif // CSV_DATA_READER_H_