/***************************************************************************
 *   Copyright (C) 2003-2005 by David Saxton                               *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#include "asmformatter.h"
#include "core/ktlconfig.h"
#include "picinfo12bit.h"
#include "picinfo14bit.h"
#include "picinfo16bit.h"

static QString extractComment( const QString & line )
{
	int pos = line.find( ';' );
	
	if ( pos == -1 )
		return "";
	
	return line.right( line.length() - pos );
}


//BEGIN class AsmFormatter
AsmFormatter::AsmFormatter()
{
}


AsmFormatter::~AsmFormatter()
{
}


QString AsmFormatter::tidyAsm( QStringList lines )
{
	// Update our indentation values from config
	m_indentAsmName = KTLConfig::indentAsmName();
	m_indentAsmData = KTLConfig::indentAsmData();
	m_indentEqu = KTLConfig::indentEqu();
	m_indentEquValue = KTLConfig::indentEquValue();
	m_indentComment = m_indentEquComment = KTLConfig::indentComment();
	
	QStringList::iterator end = lines.end();
	for ( QStringList::iterator slit = lines.begin(); slit != end; ++slit )
	{
		switch ( lineType(*slit) )
		{
			case Other:
				break;
				
			case Equ:
				*slit = tidyEqu( *slit );
				break;
				
			case Instruction:
				*slit = tidyInstruction( *slit );
				break;
		}
	}
	
	QString code;
	
	for ( QStringList::iterator slit = lines.begin(); slit != end; ++slit )
		code.append( *slit + '\n' );
	
	return code;
}


void AsmFormatter::pad( QString & text, int length )
{
	int padLength = length - text.length();
	if ( padLength <= 0 )
		return;
	
	QString pad;
	pad.fill( ' ', padLength );
	text += pad;
}


QString AsmFormatter::tidyInstruction( const QString & oldLine )
{
	InstructionParts parts( oldLine );
	QString line;
	
	if ( !parts.label().isEmpty() )
		line = parts.label() + ' ';
	pad( line, m_indentAsmName );
	
	if ( !parts.operand().isEmpty() )
		line += parts.operand() + ' ';
	pad( line, m_indentAsmData );
	
	if ( !parts.operandData().isEmpty() )
		line += parts.operandData();
	pad( line, m_indentComment );
	
	if ( parts.comment().isEmpty() )
	{
		// Remove any whitespace at the end if we're not padding out a comment
		while ( !line.isEmpty() && line[ line.length() - 1 ].isSpace() )
			line.remove( line.length() -1, 1 );
	}
	else
		line += parts.comment();
	
	return line;
}


QString AsmFormatter::tidyEqu( const QString & oldLine )
{
	QString comment = extractComment( oldLine );
	QString code = oldLine;
	code.remove( comment );
	code = code.simplifyWhiteSpace();

    QStringList parts = QStringList::split( ' ', code );

	QString pad0, pad1, pad2;
	pad0.fill( ' ', m_indentEqu - (*parts.at(0)).length() );
	pad1.fill( ' ', m_indentEquValue - m_indentEqu - (*parts.at(1)).length() );
	pad2.fill( ' ', m_indentEquComment - m_indentEquValue - m_indentEqu - (*parts.at(2)).length() );

	code = *parts.at(0) + pad0;
	code += *parts.at(1) + pad1;
	code += *parts.at(2);
	if ( !comment.isEmpty() )
	{
		code += pad2;
		code += comment;
	}
	
	return code;
}


AsmFormatter::LineType AsmFormatter::lineType( QString line )
{
	line = line.simplifyWhiteSpace();
	
	line.remove( extractComment( line ) );
	
	QStringList parts = QStringList::split( ' ', line );
	QStringList::iterator end = parts.end();
	for ( QStringList::iterator it = parts.begin(); it != end; ++it )
	{
		if ( (*it).lower() == "equ" )
			return Equ;
	}
	
	InstructionParts instructionParts( line );
	if ( !instructionParts.operand().isEmpty() )
		return Instruction;
	
	return Other;
}
//END class AsmFormatter



//BEGIN class InstructionParts
InstructionParts::InstructionParts( QString line )
{
	m_comment = extractComment( line );
	line.remove( m_comment );
	
	line = line.simplifyWhiteSpace();
	QStringList parts = QStringList::split( ' ', line );
	
	bool foundOperand = false;
	QStringList::iterator end = parts.end();
	for ( QStringList::iterator it = parts.begin(); it != end; ++it )
	{
		if ( foundOperand )
		{
			// Already found the operand, so anything else must be the operand
			// data.
			
			if ( m_operandData.isEmpty() )
				m_operandData = *it;
			else
				m_operandData += ' ' + *it;
			
			continue;
		}
		
		if ( PicAsm12bit::self()->operandList().contains( (*it).upper() )
				   || PicAsm14bit::self()->operandList().contains( (*it).upper() )
				   || PicAsm16bit::self()->operandList().contains( (*it).upper() ) )
		{
			m_operand = *it;
			foundOperand = true;
		}
		else
		{
			// Must be a label
			m_label = *it;
		}
	}
}
//END class InstructionParts

