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/********************************************************************************
* *
* A b s t r a c t I / O C l a s s *
* *
*********************************************************************************
* Copyright (C) 2005,2022 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 "fxmath.h"
#include "fxascii.h"
#include "FXArray.h"
#include "FXHash.h"
#include "FXStream.h"
#include "FXString.h"
#include "FXIO.h"
/*
Notes:
- The class FXIO provides the interface to stream- or block-devices.
- The base class implementation provides essentially a file-pointer.
- When reading, an infinite stream of zeroes is returned to the caller; when writing
all data are dropped but in either case the file-pointer maintains a tally of the
number of bytes moved up to that point.
- FXIO can thus be used to determine the length of a file without actually performing
any i/o to the actual device; this is often convenient.
*/
using namespace FX;
/*******************************************************************************/
namespace FX {
// Construct
FXIO::FXIO(){
}
// Return true if open
FXbool FXIO::isOpen() const {
return true;
}
// Return true if serial access only
FXbool FXIO::isSerial() const {
return true;
}
// Return access mode
FXuint FXIO::mode() const {
return FXIO::ReadWrite;
}
// Change access mode
FXbool FXIO::mode(FXuint){
return false;
}
// Return permissions
FXuint FXIO::perms() const {
return FXIO::AllFull;
}
// Set permissions
FXbool FXIO::perms(FXuint){
return false;
}
// Get position
FXlong FXIO::position() const {
return FXIO::Error;
}
// Move to position
FXlong FXIO::position(FXlong,FXuint){
return FXIO::Error;
}
// Read block
FXival FXIO::readBlock(void*,FXival){
return 0;
}
// Write block
FXival FXIO::writeBlock(const void*,FXival count){
return count;
}
// Read character
FXbool FXIO::readChar(FXchar& ch){
return readBlock(&ch,1)==1;
}
// Write character
FXbool FXIO::writeChar(FXchar ch){
return writeBlock(&ch,1)==1;
}
// Truncate file
FXlong FXIO::truncate(FXlong){
return FXIO::Error;
}
// Synchronize disk with cached data
FXbool FXIO::flush(){
return true;
}
// Test if we're at the end; -1 if error
FXint FXIO::eof(){
return 1;
}
// Return file size
FXlong FXIO::size(){
return 0;
}
// Close file
FXbool FXIO::close(){
return true;
}
// Destroy
FXIO::~FXIO(){
}
}
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