740 lines
17 KiB
C++
740 lines
17 KiB
C++
/*
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* This file is a part of morm
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* and is distributed under the 2-Clause BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2018-2021, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <cstdlib>
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#include <memory>
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#include "space/spaceparser.h"
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#include "dbconnector.h"
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#include "dbexpression.h"
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#include "model.h"
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#include "utf8/utf8.h"
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#include "convert/convert.h"
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namespace morm
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{
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DbConnector::DbConnector()
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{
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db_expression = nullptr;
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expression_allocated = false;
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log = nullptr;
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log_queries = false;
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}
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DbConnector::DbConnector(const DbConnector &)
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{
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db_expression = nullptr;
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expression_allocated = false;
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log = nullptr;
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}
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DbConnector::~DbConnector()
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{
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deallocate_expression();
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}
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void DbConnector::set_logger(pt::Log * log)
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{
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this->log = log;
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}
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void DbConnector::set_logger(pt::Log & log)
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{
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this->log = &log;
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}
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void DbConnector::set_log_queries(bool log_queries)
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{
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this->log_queries = log_queries;
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}
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bool DbConnector::query(const pt::TextStream & stream)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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return query(stream, *query_result_ptr);
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}
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bool DbConnector::query(const std::string & query_str)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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return query(query_str, *query_result_ptr);
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}
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bool DbConnector::query(const char * query_str)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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return query(query_str, *query_result_ptr);
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}
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bool DbConnector::query(const pt::TextStream & stream, QueryResult & query_result)
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{
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std::string query_str;
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stream.to_string(query_str);
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return query(query_str, query_result);
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}
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bool DbConnector::query(const std::string & query_str, QueryResult & query_result)
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{
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return query(query_str.c_str(), query_result);
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}
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bool DbConnector::query(const char * query_str, QueryResult & query_result)
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{
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// do query
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return false;
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}
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bool DbConnector::query_select(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_update(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_insert(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_remove(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_select(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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bool DbConnector::query_update(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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bool DbConnector::query_insert(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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bool DbConnector::query_remove(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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DbExpression * DbConnector::get_expression()
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{
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allocate_default_expression_if_needed();
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return db_expression;
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}
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void DbConnector::generate_select_columns(pt::TextStream & stream, Model & model)
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{
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allocate_default_expression_if_needed();
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if( db_expression )
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{
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db_expression->clear();
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_SELECT_COLUMNS);
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db_expression->allow_to_use_prefix(true);
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db_expression->generate_from_model(stream, model);
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}
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}
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void DbConnector::generate_insert_query(pt::TextStream & stream, Model & model)
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{
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allocate_default_expression_if_needed();
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if( db_expression )
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{
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db_expression->clear();
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db_expression->allow_to_use_prefix(false);
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stream << "insert into ";
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db_expression->schema_table_to_stream(stream, model.model_env->schema_name, model.model_env->table_name);
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stream << " (";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_DB_INSERT);
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db_expression->generate_from_model(stream, model);
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stream << ") values (";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_VALUES);
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db_expression->generate_from_model(stream, model);
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stream << ")";
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}
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}
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void DbConnector::generate_update_query(pt::TextStream & stream, Model & model)
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{
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allocate_default_expression_if_needed();
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if( db_expression )
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{
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db_expression->clear();
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db_expression->allow_to_use_prefix(false);
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stream << "update ";
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db_expression->schema_table_to_stream(stream, model.model_env->schema_name, model.model_env->table_name);
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stream << " set ";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS_VALUES);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_DB_UPDATE);
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db_expression->generate_from_model(stream, model);
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stream << " where ";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS_VALUES);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_DB_PRIMARY_KEY);
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db_expression->generate_from_model(stream, model);
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}
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}
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void DbConnector::generate_remove_query(pt::TextStream & stream, Model & model)
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{
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allocate_default_expression_if_needed();
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if( db_expression )
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{
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db_expression->clear();
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db_expression->allow_to_use_prefix(false);
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stream << "delete from ";
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db_expression->schema_table_to_stream(stream, model.model_env->schema_name, model.model_env->table_name);
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stream << " where ";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS_VALUES);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_DB_PRIMARY_KEY);
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db_expression->generate_from_model(stream, model);
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}
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}
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bool DbConnector::insert(pt::TextStream & stream, Model & model)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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generate_insert_query(stream, model);
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return query_insert(stream, *query_result_ptr);
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}
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bool DbConnector::update(pt::TextStream & stream, Model & model)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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generate_update_query(stream, model);
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return query_update(stream, *query_result_ptr);
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}
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bool DbConnector::remove(pt::TextStream & stream, Model & model)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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generate_remove_query(stream, model);
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return query_remove(stream, *query_result_ptr);
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}
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void DbConnector::deallocate_expression()
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{
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if( expression_allocated )
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{
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delete db_expression;
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db_expression = nullptr;
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expression_allocated = false;
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}
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}
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void DbConnector::allocate_default_expression_if_needed()
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{
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if( !db_expression )
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{
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allocate_default_expression();
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}
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}
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char DbConnector::unescape_hex_char_part(char hex)
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{
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if( hex>='0' && hex<='9' )
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{
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return hex - '0';
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}
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else
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if( hex>='a' && hex<='f' )
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{
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return hex - 'a' + 10;
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}
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else
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if( hex>='A' && hex<='F' )
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{
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return hex - 'A' + 10;
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}
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else
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{
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if( log )
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{
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(*log) << pt::Log::log2 << "Morm: incorrect character when reading a hex string, char code: " << (int)(unsigned char)hex;
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if( hex >= 32 )
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{
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(*log) << " '" << hex << "'";
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}
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(*log) << pt::Log::logend;
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}
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}
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return 0;
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}
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char DbConnector::unescape_hex_char(char char1, char char2)
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{
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int c1 = unescape_hex_char_part(char1);
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int c2 = unescape_hex_char_part(char2);
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return static_cast<char>(((c1 << 4) | c2));
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}
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void DbConnector::unescape_hex_string(const char * str, std::string & out)
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{
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for(size_t i=0 ; str[i] != 0 ; i+=2 )
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{
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out += unescape_hex_char(str[i], str[i+1]);
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}
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}
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void DbConnector::unescape_hex_string(const char * str, std::wstring & out, const FT & field_type)
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{
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if( field_type.use_utf8() )
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{
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size_t len;
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wchar_t c;
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while( *str != 0 && (len = unescape_hex_char(str, c, field_type)) > 0 )
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{
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out += c;
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str += len;
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}
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}
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else
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{
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for(size_t i=0 ; str[i] != 0 ; i+=2 )
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{
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out += static_cast<wchar_t>(static_cast<unsigned char>(unescape_hex_char(str[i], str[i+1])));
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}
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}
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}
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void DbConnector::unescape_bin_string(const char * str, std::string & out)
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{
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unescape_hex_string(str, out);
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}
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void DbConnector::unescape_bin_string(const char * str, std::wstring & out, const FT & field_type)
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{
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unescape_hex_string(str, out, field_type);
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}
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// returns how many characters have been provided to utf8_str buffer
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// min size of utf8_str should be 5 bytes (max 4 bytes for utf8 sequence + terminating null)
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size_t DbConnector::unescape_hex_char(const char * value_str, char * utf8_str, size_t utf8_str_max_len)
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{
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size_t value_str_index = 0;
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size_t utf8_str_index = 0;
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utf8_str[0] = 0;
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while( utf8_str_index + 1 < utf8_str_max_len )
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{
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if( value_str[value_str_index] != 0 && value_str[value_str_index+1] != 0 )
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{
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utf8_str[utf8_str_index] = unescape_hex_char(value_str[value_str_index], value_str[value_str_index+1]);
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utf8_str[utf8_str_index+1] = 0;
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}
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else
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{
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break;
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}
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value_str_index += 2;
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utf8_str_index += 1;
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}
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return utf8_str_index;
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}
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// CHECKME need to be tested
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// returns how many characters were used from value_str
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size_t DbConnector::unescape_hex_char(const char * value_str, wchar_t & field_value, const FT & field_type)
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{
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size_t len = 0;
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if( field_type.use_utf8() )
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{
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char utf8_str[4 + 1]; // max utf8 sequence length + terminating zero
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size_t utf8_str_len = unescape_hex_char(value_str, utf8_str, sizeof(utf8_str) / sizeof(char));
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int value_int;
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bool is_correct;
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len = pt::UTF8ToInt(utf8_str, utf8_str_len, value_int, is_correct);
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len = len * 2;
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if( is_correct )
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{
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field_value = static_cast<wchar_t>(value_int);
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}
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else
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{
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if( log )
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{
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(*log) << pt::Log::log2 << "Morm: incorrect utf-8 sequence (ignoring)" << pt::Log::logend;
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}
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}
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}
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else
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{
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if( value_str[0] != 0 && value_str[1] != 0 )
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{
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field_value = static_cast<wchar_t>(static_cast<unsigned char>(unescape_hex_char(value_str[0], value_str[1])));
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len = 2;
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}
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else
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{
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if( log )
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{
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(*log) << pt::Log::log2 << "Morm: unexpected end of string (ignoring)" << pt::Log::logend;
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}
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}
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}
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return len;
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}
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size_t DbConnector::unescape_bin_char(const char * value_str, wchar_t & field_value, const FT & field_type)
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{
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return unescape_hex_char(value_str, field_value, field_type);
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}
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// CHECKME need to be tested
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void DbConnector::get_value(const char * value_str, char & field_value, const FT & field_type)
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{
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wchar_t c;
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field_value = 0;
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get_value(value_str, c, field_type);
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if( field_type.use_utf8() )
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{
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if( c <= 127 )
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{
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field_value = static_cast<char>(c);
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}
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else
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{
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if( log )
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{
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(*log) << pt::Log::log2 << "Morm: a character greater than 127 cannot be stored in char type, code point: "
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<< (int)c << " '" << c << "'" << pt::Log::logend;
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}
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}
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}
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else
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{
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field_value = static_cast<char>(c);
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}
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}
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// CHECKME need to be tested
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void DbConnector::get_value(const char * value_str, unsigned char & field_value, const FT & field_type)
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{
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char tmp_char;
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get_value(value_str, tmp_char, field_type);
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field_value = static_cast<unsigned char>(tmp_char);
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}
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// CHECKME need to be tested
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void DbConnector::get_value(const char * value_str, wchar_t & field_value, const FT & field_type)
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{
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field_value = 0;
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if( field_type.is_binary() )
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{
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unescape_bin_char(value_str, field_value, field_type);
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}
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else
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if( field_type.is_hexadecimal() )
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{
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unescape_hex_char(value_str, field_value, field_type);
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}
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else
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{
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if( field_type.use_utf8() )
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{
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int value_int;
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bool is_correct;
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pt::UTF8ToInt(value_str, value_int, is_correct);
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if( is_correct )
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{
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field_value = static_cast<wchar_t>(value_int);
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}
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else
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{
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// report an error?
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}
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}
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else
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{
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field_value = static_cast<wchar_t>((unsigned char)*value_str);
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}
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}
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}
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|
|
// CHECKME need to be tested
|
|
void DbConnector::get_value(const char * value_str, std::wstring & field_value, const FT & field_type)
|
|
{
|
|
if( field_type.is_binary() )
|
|
{
|
|
unescape_bin_string(value_str, field_value, field_type);
|
|
}
|
|
else
|
|
if( field_type.is_hexadecimal() )
|
|
{
|
|
unescape_hex_string(value_str, field_value, field_type);
|
|
}
|
|
else
|
|
{
|
|
if( field_type.use_utf8() )
|
|
{
|
|
pt::UTF8ToWide(value_str, field_value);
|
|
}
|
|
else
|
|
{
|
|
for(size_t i=0 ; value_str[i] != 0 ; ++i)
|
|
{
|
|
field_value += static_cast<wchar_t>(value_str[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// CHECKME need to be tested
|
|
void DbConnector::get_value(const char * value_str, std::string & field_value, const FT & field_type)
|
|
{
|
|
if( field_type.is_binary() )
|
|
{
|
|
unescape_bin_string(value_str, field_value);
|
|
}
|
|
else
|
|
if( field_type.is_hexadecimal() )
|
|
{
|
|
unescape_hex_string(value_str, field_value);
|
|
}
|
|
else
|
|
{
|
|
field_value = value_str;
|
|
}
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, bool & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME
|
|
// this 't' is locale dependent
|
|
field_value = (value_str[0]=='t' || value_str[0]=='y' || value_str[0]=='1');
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, short & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = (short)pt::Toi(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned short & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = (unsigned short)pt::Toui(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, int & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::Toi(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned int & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::Toui(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, long & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::Tol(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned long & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::Toul(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, long long & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::Toll(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned long long & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::Toull(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, float & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = strtof(value_str, 0);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, double & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = strtod(value_str, 0);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, long double & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = strtold(value_str, 0);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, pt::Date & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some log if parsing failed
|
|
field_value.Parse(value_str);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, pt::Space & field_value, const FT & field_type)
|
|
{
|
|
field_value.clear();
|
|
|
|
if( *value_str != '\0' )
|
|
{
|
|
pt::SpaceParser space_parser;
|
|
space_parser.SetSpace(field_value);
|
|
|
|
if( space_parser.ParseSpace(value_str) != pt::SpaceParser::ok )
|
|
{
|
|
field_value.clear();
|
|
|
|
if( log )
|
|
{
|
|
(*log) << pt::Log::log2 << "Morm: I cannot correctly parse the Space struct from the datebase"
|
|
<< ", the raw string is: " << value_str << pt::Log::logend;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
const char * DbConnector::query_last_sequence(const wchar_t * sequence_table_name)
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
}
|