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/********************************************************************************
* *
* X M L - F i l e I / O *
* *
*********************************************************************************
* Copyright (C) 2016,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#include "xincs.h"
#include "fxver.h"
#include "fxdefs.h"
#include "fxchar.h"
#include "fxmath.h"
#include "fxascii.h"
#include "FXElement.h"
#include "FXArray.h"
#include "FXString.h"
#include "FXParseBuffer.h"
#include "FXIO.h"
#include "FXIODevice.h"
#include "FXStat.h"
#include "FXFile.h"
#include "FXException.h"
#include "FXStringDictionary.h"
#include "FXCallback.h"
#include "FXXML.h"
#include "FXXMLFile.h"
/*
Notes:
- XML serialization to a file.
- To fill buffer, move unread bytes to start, then load as from file as will fit;
thus, wptr==endptr indicates the file is not fully loaded yet, while wptr<endptr
means we've reached end of file.
- To flush buffer, try write all bytes from buffer; if not able to write it all,
move unwritten bytes to start to have maximum of free space in buffer.
*/
using namespace FX;
namespace FX {
/*******************************************************************************/
// Create XML file i/o object
FXXMLFile::FXXMLFile(){
FXTRACE((100,"FXXMLFile::FXXMLFile\n"));
}
// Create XML file i/o object and open it
FXXMLFile::FXXMLFile(const FXString& filename,Direction d,FXuval sz){
FXTRACE((100,"FXXMLFile::FXXMLFile(\"%s\",%s,%lu)\n",filename.text(),(d==Save)?"Save":(d==Load)?"Load":"Stop",sz));
open(filename,d,sz);
}
// Open XML file for operation
FXbool FXXMLFile::open(const FXString& filename,Direction d,FXuval sz){
FXTRACE((101,"FXXMLFile::open(\"%s\",%s,%lu)\n",filename.text(),(d==Save)?"Save":(d==Load)?"Load":"Stop",sz));
if(dir==Stop){
FXchar *buffer;
if(allocElms(buffer,sz)){
if(file.open(filename,(d==Save)?FXIO::Writing:FXIO::Reading,FXIO::AllReadWrite)){
if(FXXML::open(buffer,sz,d)){
rptr=endptr;
sptr=endptr;
wptr=endptr;
return true;
}
file.close();
}
freeElms(buffer);
}
}
return false;
}
// Read at least count bytes into buffer; return bytes available, or -1 for error
FXival FXXMLFile::fill(FXival){
if(dir==Load){
FXival nbytes;
moveElms(begptr,rptr,wptr-rptr);
wptr=begptr+(wptr-rptr);
sptr=begptr+(sptr-rptr);
rptr=begptr;
nbytes=file.readBlock(wptr,endptr-wptr);
if(0<=nbytes){
wptr+=nbytes;
if(wptr<endptr){ wptr[0]='\0'; }
return wptr-sptr; // Input left to read
}
}
return -1;
}
// Write at least count bytes from buffer; return space available, or -1 for error
FXival FXXMLFile::flush(FXival){
if(dir==Save){
FXival nbytes;
nbytes=file.writeBlock(rptr,wptr-rptr);
if(0<=nbytes){
rptr+=nbytes;
moveElms(begptr,rptr,wptr-rptr);
wptr=begptr+(wptr-rptr);
rptr=begptr;
return endptr-wptr; // Space left to write
}
}
return -1;
}
// Close stream and delete buffers
FXbool FXXMLFile::close(){
FXTRACE((101,"FXXMLFile::close()\n"));
FXchar *buffer=begptr;
if(FXXML::close()){
freeElms(buffer);
return file.close();
}
return false;
}
// Close XML file
FXXMLFile::~FXXMLFile(){
FXTRACE((100,"FXXMLFile::~FXXMLFile\n"));
close();
}
}
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