std::string_view 的使用

module/Local_Server/External_Database/Resource_Utils.h

@@ -1,4 +1,5 @@
 #pragma once
+#include <string_view>
 
 #include "global.h"
 
@@ -33,24 +34,24 @@ struct Schema_Only_Resource_Config {
   std::vector<std::string> primary_key_columns;
 };
 
-std::string quote_identifier(const std::string &value);
-std::string normalize_key(std::string value);
-std::optional<std::string> normalize_field(std::string value);
+std::string quote_identifier(std::string_view value);
+std::string normalize_key(std::string_view value);
+std::optional<std::string> normalize_field(std::string_view value);
 void bind_optional(SQLite::Statement &statement, int index,
                    const std::optional<std::string> &value);
 bool read_csv_row(std::istream &input, std::vector<std::string> &fields,
                   char delimiter);
 std::string
-make_upsert_sql(const std::string &table_name,
+make_upsert_sql(std::string_view table_name,
                 const std::vector<std::string> &columns,
                 const std::vector<std::string> &primary_key_columns);
-void download_to_file(std::string url,
+void download_to_file(std::string_view url,
                       const std::filesystem::path &target_file);
 void decompress_gzip(const std::filesystem::path &gzip_file,
                      const std::filesystem::path &target_file);
 std::size_t import_header_csv(
     SQLite::Database &db, const std::filesystem::path &source_file,
-    const std::string &table_name, const std::vector<std::string> &columns,
+    std::string_view table_name, const std::vector<std::string> &columns,
     const std::vector<std::string> &primary_key_columns, char delimiter = ',');
 
 std::unique_ptr<External_Resources>
@@ -58,7 +59,7 @@ make_header_csv_resource(Header_Csv_Resource_Config config);
 std::unique_ptr<External_Resources>
 make_schema_only_resource(Schema_Only_Resource_Config config);
 std::unique_ptr<External_Resources>
-make_tar1090_aircraft_resource(std::string name, std::string description,
+make_tar1090_aircraft_resource(std::string_view name, std::string_view description,
                                std::uint64_t update_interval_seconds);
 
 } // namespace External_Database_Utils