ttcalc/src/parsermanager.cpp

/*
 * This file is a part of TTCalc - a mathematical calculator
 * and is distributed under the (new) BSD licence.
 * Author: Tomasz Sowa <t.sowa@slimaczek.pl>
 */

/* 
 * Copyright (c) 2006-2007, Tomasz Sowa
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *    
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *    
 *  * Neither the name Tomasz Sowa nor the names of contributors to this
 *    project may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "compileconfig.h"
#include "parsermanager.h"




ParserManager::ParserManager() : buffer_len(2048)
{
	buffer = 0;
	base_input = base_output = 10;
	always_scientific = 0;
	when_scientific = 15;
	rounding = -2;
}


ParserManager::ParserManager(const ParserManager & p) : buffer_len(p.buffer_len)
{
	buffer = 0;
	base_input = p.base_input;
	base_output = p.base_output;
	always_scientific = p.always_scientific;
	when_scientific = p.when_scientific;
	rounding = p.rounding;
}


ParserManager & ParserManager::operator=(const ParserManager & p)
{
	buffer = 0;

return *this;
}


ParserManager::~ParserManager()
{
	delete [] buffer;
}


ttmath::ErrorCode ParserManager::GetLastCode()
{
	return code;
}


ttmath::ErrorCode ParserManager::Parse()
{
	try
	{
		switch( precision )
		{
		case 0:
			parser1.SetBase(base_input);
			code = parser1.Parse(buffer);
			break;

		case 1:
			parser2.SetBase(base_input);
			code = parser2.Parse(buffer);
			break;

		default:
			parser3.SetBase(base_input);
			code = parser3.Parse(buffer);
			break;
		}
	}
	catch(...)
	{
		// we are in a thread, we shouldn't go up
		code = ttmath::err_internal_error;
	}

return code;
}


void ParserManager::MakeCopyOfVariables()
{
unsigned int i;

	char * pchar = (char*)GetPrgRes()->GetBuffer();
	for(i = 0 ; i<buffer_len-1 && pchar[i]!=0 ; ++i)
		buffer[i] = pchar[i];

	buffer[i] = 0;

	//
	
	variables = *GetPrgRes()->GetVariables();
	functions = *GetPrgRes()->GetFunctions();

	//
	base_input  = GetPrgRes()->GetBaseInput();
	base_output = GetPrgRes()->GetBaseOutput();

	always_scientific = GetPrgRes()->GetDisplayAlwaysScientific();
	when_scientific   = GetPrgRes()->GetDisplayWhenScientific();
	rounding          = GetPrgRes()->GetDisplayRounding();
	precision         = GetPrgRes()->GetPrecision();

	country = GetPrgRes()->GetLanguages()->GetCurrentLanguage();
}


void ParserManager::Init()
{
	buffer = new char[buffer_len];
	buffer[0] = 0;

	parser1.SetStopObject( GetPrgRes()->GetThreadController()->GetStopObject() );
	parser1.SetVariables( &variables );
	parser1.SetFunctions( &functions );

	parser2.SetStopObject( GetPrgRes()->GetThreadController()->GetStopObject() );
	parser2.SetVariables( &variables );
	parser2.SetFunctions( &functions );

	parser3.SetStopObject( GetPrgRes()->GetThreadController()->GetStopObject() );
	parser3.SetVariables( &variables );
	parser3.SetFunctions( &functions );
}


void ParserManager::PrintResult()
{
	if( code == ttmath::err_ok )
	{
		switch( precision )
		{
		case 0:
			return PrintResult(parser1);

		case 1:
			return PrintResult(parser2);

		default:
			return PrintResult(parser3);
		}
	}
	else
	{
		// we can call GetPrgRes() here because we're reading
		// static value like GetMainWindow() which are set only once
		// at the beginning of the program and will never be changed later
		// by the first thread

		// note that we're using a long form of a method ErrorMessage i.g.
		// ErrorMessage(Country country, ttmath::ErrorCode code)
		// and not ErrorMessage(ttmath::ErrorCode code)
		// because someone can change the country when we're calling this method
		// (in the main thread) and the latter function would be using its own 
		// 'current_country' value which could be inconsistent

		// now, displying an error message is making in the main windows
		// (after pressing a special key)

		/*
		SetDlgItemText(
			GetPrgRes()->GetMainWindow(),
			IDC_OUTPUT_EDIT,
			GetPrgRes()->GetLanguages()->ErrorMessage(country, code) );
		*/
	}
}