opensteno_qmk/lib/usbhost/USB_Host_Shield_2.0/parsetools.cpp

67 lines
2.2 KiB
C++

/* 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 "Usb.h"
bool MultiByteValueParser::Parse(uint8_t **pp, uint16_t *pcntdn) {
if(!pBuf) {
Notify(PSTR("Buffer pointer is NULL!\r\n"), 0x80);
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;
}