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/* <!-- copyright */
/*
* aria2 - a simple utility for downloading files faster
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* copyright --> */
#include "ByteArrayDiskWriter.h"
#include "Util.h"
ByteArrayDiskWriter::ByteArrayDiskWriter():buf(NULL) {
}
ByteArrayDiskWriter::~ByteArrayDiskWriter() {
closeFile();
}
void ByteArrayDiskWriter::clear() {
if(buf != NULL) {
delete [] buf;
buf = NULL;
}
}
void ByteArrayDiskWriter::init() {
maxBufLength = 256;
buf = new char[maxBufLength];
bufLength = 0;
}
void ByteArrayDiskWriter::initAndOpenFile(const string& filename) {
openFile(filename);
}
void ByteArrayDiskWriter::openFile(const string& filename) {
clear();
init();
}
void ByteArrayDiskWriter::closeFile() {
clear();
}
void ByteArrayDiskWriter::openExistingFile(const string& filename) {
openFile(filename);
}
void ByteArrayDiskWriter::writeData(const char* data, int dataLength, long long int position) {
if(bufLength+dataLength >= maxBufLength) {
maxBufLength = Util::expandBuffer(&buf, bufLength, bufLength+dataLength);
}
memcpy(buf+bufLength, data, dataLength);
bufLength += dataLength;
}
int ByteArrayDiskWriter::readData(char* data, int len, long long int position) {
if(position >= bufLength) {
return 0;
}
int readLength;
if(position+len <= bufLength) {
readLength = len;
} else {
readLength = bufLength-position;
}
memcpy(data, buf+position, readLength);
return readLength;
}
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