mirror of
https://github.com/cuberite/SQLiteCpp.git
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95 lines
3.0 KiB
C++
95 lines
3.0 KiB
C++
/**
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* @file Column.cpp
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* @brief Encapsulation of a Column in a Row of the result.
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*
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* Copyright (c) 2012-2013 Sebastien Rombauts (sebastien.rombauts@gmail.com)
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*
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* Distributed under the MIT License (MIT) (See accompanying file LICENSE.txt
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* or copy at http://opensource.org/licenses/MIT)
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*/
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#include "Column.h"
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#include <iostream>
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namespace SQLite
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{
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// Encapsulation of a Column in a Row of the result.
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Column::Column(sqlite3* apSQLite, sqlite3_stmt* apStmt, unsigned int* apStmtRefCount, int aIndex) throw() : // nothrow
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mpSQLite (apSQLite),
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mpStmt (apStmt),
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mpStmtRefCount (apStmtRefCount),
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mIndex (aIndex)
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{
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// Increment the reference counter of the sqlite3_stmt,
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// telling the Statement object not to finalize the sqlite3_stmt during the lifetime of this Column objet
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(*mpStmtRefCount)++;
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}
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// Copy constructor
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Column::Column(const Column& copy) throw() : // nothrow
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mpSQLite (copy.mpSQLite),
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mpStmt (copy.mpStmt),
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mpStmtRefCount (copy.mpStmtRefCount),
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mIndex (copy.mIndex)
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{
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// Increment the reference counter of the sqlite3_stmt,
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// telling the Statement object not to finalize the sqlite3_stmt during the lifetime of this Column objet
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(*mpStmtRefCount)++;
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}
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// Finalize and unregister the SQL query from the SQLite Database Connection.
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Column::~Column(void) throw() // nothrow
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{
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// Decrement and check the reference counter of the sqlite3_stmt
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(*mpStmtRefCount)--;
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if (0 == *mpStmtRefCount)
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{
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// When count reaches zero, finalize the sqlite3_stmt, as no Column nor Statement object use it any more
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int ret = sqlite3_finalize(mpStmt);
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// Never throw an exception in a destructor
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//std::cout << sqlite3_errmsg(mpSQLite) << std::endl;
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SQLITE_CPP_ASSERT (SQLITE_OK == ret);
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mpStmt = NULL;
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// and delete the reference counter
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delete mpStmtRefCount;
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}
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// else, the finalization will be done by the Statement or another Column object (the last one)
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}
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// Return the integer value of the column specified by its index starting at 0
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int Column::getInt(void) const throw() // nothrow
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{
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return sqlite3_column_int(mpStmt, mIndex);
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}
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// Return the 64bits integer value of the column specified by its index starting at 0
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sqlite3_int64 Column::getInt64(void) const throw() // nothrow
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{
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return sqlite3_column_int64(mpStmt, mIndex);
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}
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// Return the double value of the column specified by its index starting at 0
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double Column::getDouble(void) const throw() // nothrow
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{
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return sqlite3_column_double(mpStmt, mIndex);
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}
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// Return a pointer to the text value (NULL terminated string) of the column specified by its index starting at 0
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const char* Column::getText(void) const throw() // nothrow
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{
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return (const char*)sqlite3_column_text(mpStmt, mIndex);
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}
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// Standard std::ostream inserter
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std::ostream& operator<<(std::ostream &stream, const Column& column)
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{
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stream << column.getText();
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return stream;
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}
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} // namespace SQLite
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