parsetools.cpp

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/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.

This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").

Contact information
-------------------

Circuits At Home, LTD
Web      :  http://www.circuitsathome.com
e-mail   :  support@circuitsathome.com
*/
#include "parsetools.h"

bool MultiByteValueParser::Parse(uint8_t **pp, uint16_t *pcntdn)
{
    if (!pBuf)
    {
        Notify(PSTR("Buffer pointer is NULL!\r\n"));
        return false;
    }
    for (; countDown && (*pcntdn); countDown--, (*pcntdn)--, (*pp)++)
        pBuf[valueSize-countDown] = (**pp);

    if (countDown)
        return false;

    countDown = valueSize;
    return true;
}

bool PTPListParser::Parse(uint8_t **pp, uint16_t *pcntdn, PTP_ARRAY_EL_FUNC pf, const void *me)
{
    switch (nStage)
    {
    case 0:
        pBuf->valueSize = lenSize;
        theParser.Initialize(pBuf);
        nStage = 1;

    case 1:
        if (!theParser.Parse(pp, pcntdn))
            return false;
        
        arLen = 0;
        arLen = (pBuf->valueSize >= 4) ? *((uint32_t*)pBuf->pValue) : (uint32_t)(*((uint16_t*)pBuf->pValue));
        arLenCntdn = arLen;
        nStage = 2;

    case 2:
        pBuf->valueSize = valSize;
        theParser.Initialize(pBuf);
        nStage = 3;

    case 3:
        for (; arLenCntdn; arLenCntdn--)
        {
            if (!theParser.Parse(pp, pcntdn))
                return false;
            
            if (pf)
                pf(pBuf, (arLen - arLenCntdn), me);
        }

        nStage = 0;
    }
    return true;
}