mirror of
https://github.com/aria2/aria2.git
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84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - a simple utility for downloading files faster
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* copyright --> */
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#include "ByteArrayDiskWriter.h"
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#include "Util.h"
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ByteArrayDiskWriter::ByteArrayDiskWriter():buf(NULL) {
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}
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ByteArrayDiskWriter::~ByteArrayDiskWriter() {
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closeFile();
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}
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void ByteArrayDiskWriter::clear() {
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if(buf != NULL) {
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delete [] buf;
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buf = NULL;
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}
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}
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void ByteArrayDiskWriter::init() {
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maxBufLength = 256;
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buf = new char[maxBufLength];
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bufLength = 0;
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}
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void ByteArrayDiskWriter::initAndOpenFile(const string& filename) {
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openFile(filename);
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}
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void ByteArrayDiskWriter::openFile(const string& filename) {
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clear();
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init();
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}
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void ByteArrayDiskWriter::closeFile() {
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clear();
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}
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void ByteArrayDiskWriter::openExistingFile(const string& filename) {
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openFile(filename);
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}
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void ByteArrayDiskWriter::writeData(const char* data, int dataLength, long long int position) {
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if(bufLength+dataLength >= maxBufLength) {
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maxBufLength = Util::expandBuffer(&buf, bufLength, bufLength+dataLength);
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}
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memcpy(buf+bufLength, data, dataLength);
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bufLength += dataLength;
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}
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int ByteArrayDiskWriter::readData(char* data, int len, long long int position) {
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if(position >= bufLength) {
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return 0;
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}
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int readLength;
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if(position+len <= bufLength) {
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readLength = len;
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} else {
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readLength = bufLength-position;
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}
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memcpy(data, buf+position, readLength);
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return readLength;
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}
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