/*

* Copyright (c) 2003-2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  ?Description

*

*/

#include <string.h>

#include "SDCGlobals.h"

#include "SDCInput.h"

// Make std namespace available for compatibility

namespace std {}

using namespace std;

//////////////////////////////////////////////////////////////////////

// Construction/Destruction

//////////////////////////////////////////////////////////////////////

CSDCInput::CSDCInput()

    {

    iLineNumber = -1;

    iFile = NULL;

    iHash = 0;

    }

CSDCInput::~CSDCInput()

    {

    if( iFile )

        {

        fclose( iFile );

        iFile = NULL;

        }

    }

//////////////////////////////////////////////////////////////////////

// Other methods

//////////////////////////////////////////////////////////////////////

void CSDCInput::Open( const char *aFilename )

    {

    iLineNumber = 1;

    iFile = fopen( aFilename, "rb" );

    if( !iFile ) throw CSDCException( ESDCFileOpenError, "Cannot open input file" );

    int testChar1, testChar2;

    testChar1 = fgetc( iFile );

    testChar2 = fgetc( iFile );

    if( (testChar1==EOF) || (testChar2==EOF) ) throw CSDCException( ESDCPrematureEOIError, "Unicode detection failed" );

    if( (testChar1==255) && (testChar2==254) )

        {

        iUnicode = true;

        }

    else

        {

        iUnicode = false;

        }

    if( !iUnicode )

        {

        if( fseek( iFile, 0, SEEK_SET ) ) throw CSDCException( ESDCSeekError, "Seek failed after Unicode detection" );

        }

    iFirstInLine = true;

    ReadNextChar();

    }

bool CSDCInput::NextToken()

    {

    return ParseToken( L" \t", L" \t\r\n" );

    }

bool CSDCInput::NextTokenAllowLF()

    {

    return ParseToken( L" \t\r\n", L" \t\r\n" );

    }

bool CSDCInput::NextStringToken()

    {

    wcscpy( iToken, L"" );

    while( wcschr( L" \t", iNextChar ) ) ReadNextChar();

    if( iNextChar != L'\"' ) throw CSDCException( ESDCParseError, "No opening quotation mark for string found" );

    bool escaped = false;

    wchar_t escapeToken[512];

    wcscpy( escapeToken, L"" );

    ReadNextChar();

    while( iNextChar != L'\"' )

        {

        if( escaped )

            {

            if( iNextChar == L'>' )

                {

                escaped = false;

                wchar_t escapedCh = (wchar_t)ConvertToNumber( escapeToken );

                wcsncat( iToken, &escapedCh, 1 );

                wcscpy( escapeToken, L"" );

                }

            else

                {

                wcsncat( escapeToken, &iNextChar, 1 );

                }

            }

        else

            {

            if( iNextChar == L'<' )

                {

                escaped = true;

                }

            else

                {

                wcsncat( iToken, &iNextChar, 1 );

                }

            }

        ReadNextChar();

        }

    if( escaped ) throw CSDCException( ESDCParseError, "Unterminated escape in string" );

    ReadNextChar();

    return wcslen(iToken)>0?true:false;

    }

int CSDCInput::NextRawToken()

    {

    wcscpy( iToken, L"" );

    int count = 0;

    while( wcschr( L" \t", iNextChar ) ) ReadNextChar();

    if( iNextChar != L'[' ) throw CSDCException( ESDCParseError, "No opening [ for raw data found" );

    bool inData = false;

    wchar_t dataToken[512];

    wcscpy( dataToken, L"" );

    ReadNextChar();

    bool quit = false;

    while( !quit )

        {

        if( (iNextChar==L'\n') || (iNextChar==L'\r') || (iNextChar==WEOF) )

            throw CSDCException( ESDCParseError, "Unterminated raw data sequence, ] missing" );

        if( inData )

            {

            if( iNextChar == L' ' || iNextChar == L']')

                {

                inData = false;

                wchar_t data = (wchar_t)ConvertToNumber( dataToken );

                iToken[count] = data;

                wcscpy( dataToken, L"" );

                count++;

                }

            else

                {

                wcsncat( dataToken, &iNextChar, 1 );

                }

            }

        else

            {

            if( iNextChar != L' ' && iNextChar != L']')

                {

                inData = true;

                if( count+1 >= 512 )

                    throw CSDCException( ESDCParseError, "Raw data sequence too long, maximum is 512 items" );

                continue; // We need to skip that ReadNextChar because 0 is part of the number token

                }

            }

        if( iNextChar == L']' )

            {

            quit = true;

            // Because the next ReadNextChar is executed the trailing ] is

            // skipped.

            }

        ReadNextChar();

        }

    return count;

    }

int CSDCInput::ConvertToNumber( const wchar_t* aToken )

    {

    bool hexadecimal = false;

    int result = 0;

    const wchar_t *p = aToken;

    if( hexadecimal ) p = p+2;

    if( *p == 0 ) throw CSDCException( ESDCParseError, "Number token is empty" );

    bool negative = false;

    if( *p == L'-' )

        {

        negative = true;

        p = p+1;

        }

    while( *p )

        {

        if( hexadecimal )

            {

            result *= 16;

            if( (*p>=L'0') && (*p<=L'9') ) result += *p - L'0';

            else if( (*p>=L'A') && (*p<=L'F') ) result += *p - L'A' + 10;

            else if( (*p>=L'a') && (*p<=L'f') ) result += *p - L'a' + 10;

            else throw CSDCException( ESDCParseError, "Non-hexadecimal character in number token" );

            }

        else

            {

            result *= 10;

            if( (*p>=L'0') && (*p<=L'9') ) result += *p - L'0';

            else throw CSDCException( ESDCParseError, "Non-numeric character in number token" );

            }

        p = p+1;

        }

    if( negative ) result = 0-result;

    return result;

    }

void CSDCInput::ConvertToAscii( char* aTarget, const wchar_t* aSource )

    {

    int i = 0;

    while( true )

        {

        aTarget[i] = (char)aSource[i];

        if( !aSource[i] ) break;

        i++;

        }

    }

void CSDCInput::ConvertToAsciiWithCPPEscapes( char* aTarget, const wchar_t* aSource )

    {

    int srcI = 0;

    int trgI = 0;

    while( true )

        {

        char ch = (char)aSource[srcI++];

        if( !ch )

            {

            aTarget[trgI++] = ch;

            break;

            }

        switch( ch )

            {

            case '\\':

                aTarget[trgI++] = '\\';

                aTarget[trgI++] = '\\';

                break;

            default:

                aTarget[trgI++] = ch;

            }

        }

    }

TSDCColorDepth CSDCInput::ConvertToColorDepth( const wchar_t* aToken )

    {

    throw CSDCException( ESDCParseError, "Unknown color depth parameter" );

    }

int CSDCInput::ConvertToLayer( const wchar_t* aToken )

    {

    wchar_t buf[512];

    wcscpy( buf, aToken );

    wchar_t* p = wcsstr( buf, L"/" );

    if( !p ) throw CSDCException( ESDCParseError, "Slash expected in layer parameter" );

    *p = 0;

    p = p+1;

    int layer = ConvertToNumber( buf ) << 8;

        {

        layer |= 0x02;

        }

        {

        layer |= 0x04;

        }

        {

        layer |= 0x08;

        }

    else

        {

        throw CSDCException( ESDCParseError, "Unidentified layer specifier" );

        }

    return layer;

    }

bool CSDCInput::IsSvgFile( const wchar_t* aFilename )

    {

    int len = wcslen( aFilename );

    if( len<4 ) return false;

    const wchar_t* p = aFilename + len - 4;

        {

        return true;

        }

    return false;

    }

void CSDCInput::RawRead()

    {

    if( iUnicode )

        {

        iNextChar = fgetwc( iFile );

        }

    else

        {

        int ch = fgetc( iFile );

        if( ch == EOF )

            {

            iNextChar = WEOF;

            }

        else

            {

            iNextChar = ch;

            }

        }

    iHash += iNextChar;

    }

bool CSDCInput::ReadNextChar()

    {

    RawRead();

    if( iFirstInLine )

        {

        iFirstInLine = false;

        if( iNextChar == L'/' )

            {

            while( (iNextChar!=L'\n') && (iNextChar!=WEOF) ) RawRead();

            }

        }

    if( iNextChar == L'\n' )

        {

        iLineNumber++;

        iFirstInLine = true;

        }

    return iNextChar==WEOF?false:true;

    }

bool CSDCInput::ParseToken( const wchar_t* aSeparators, const wchar_t* aTerminators )

    {

    wcscpy( iToken, L"" );

    while( wcschr( aSeparators, iNextChar ) )

        {

        ReadNextChar();

        }

    if( iNextChar == WEOF ) return false;

    while( !wcschr( aTerminators, iNextChar ) )

        {

        if( iNextChar == WEOF ) break;

        wcsncat( iToken, &iNextChar, 1 );

        ReadNextChar();

        }

    return wcslen(iToken)>0?true:false;

    }

// End of file