Vng.cpp

   1 /*
   2  * This file is part of the vng project
   3  * Copyright (C) 2008 Thomas Zander <tzander@trolltech.com>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 #include "Vng.h"
  19
  20 #include <QProcess>
  21 #include <QDebug>
  22
  23 using namespace Vng;
  24
  25 qint64 Vng::readLine(QIODevice *device, char *buffer, int maxLength)
  26 {
  27     device->waitForReadyRead(-1);
  28     return device->readLine(buffer, maxLength);
  29 }
  30
  31 bool Vng::copyFile(QIODevice &from, QIODevice &to) {
  32     to.open(QIODevice::WriteOnly);
  33     char buf[4096];
  34     while (true) {
  35         from.waitForReadyRead(-1);
  36         qint64 len = from.read(buf, sizeof(buf));
  37         if (len <= 0) { // done!
  38             to.close();
  39             break;
  40         }
  41         while(len > 0) {
  42             qint64 written = to.write(buf, len);
  43             if (written == -1)    // write error!
  44                 return false;
  45             len -= written;
  46         }
  47     }
  48     return true;
  49 }