File indexing completed on 2024-12-22 04:18:20

 /***************************************************************************
  *                                                                         *
  *   Copyright : (C) 2012 Peter Kümmel                                     *
  *   email     : syntheticpp@gmx.net                                       *
  *                                                                         *
  *   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.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include <QtCore>
 
 #include <math.h>
 #include <stdio.h>
 
 #ifdef Q_CC_MSVC
 #define snprintf _snprintf_s
 #endif
 
 
 void printHelp()
 {
   printf("Arguments: <filename> <number of columns>  <file size in MB>\n");
 }
 
 QByteArray calcLine(double x, int numCols)
 {
   QString cols;
   for (int i = 0; i < numCols; i++) {
     cols += QString("%1").arg(sin(x));
   }
   cols += "\n";
   return cols.toLatin1();
 }
 
 
 QByteArray calcLine2(double x, int numCols)
 {
   QByteArray cols;
   for (int i = 0; i < numCols; i++) {
     char buffer[50];
     snprintf(buffer, 50, "%.10f ", sin(x));
     cols += QByteArray(buffer);
   }
   return cols + "\n";
 }
 
 
 int main(int argc, char *argv[]) 
 {
   QCoreApplication app(argc, argv);
   QStringList args = app.arguments();
   if (args.size() != 4) {
     printHelp();
     return 1;
   }
 
   QString filename =  args[1];
   int cols = args[2].toInt();
   qint64 mb = args[3].toInt();
   
   QFile file(filename);
   if (!file.open(QIODevice::WriteOnly)) {
     printf("Could not open file '%s'\n", qPrintable(QFileInfo(filename).absoluteFilePath()));
     return 1;
   }
 
   printf("Writing file %s\n", qPrintable(QFileInfo(filename).absoluteFilePath()));
   int progress = 0;
   int progStep = mb > 1000 ? 1 : 10;
   double dx = 1.0 * M_PI / 100;
   double x = 0;
   qint64 fileSize = 0;
   qint64 maxSize = mb * 1024 * 1024;
   while (fileSize < maxSize) {
     file.write(calcLine2(x, cols));
     x += dx;
     fileSize = file.size();
     int done = 100.0 / progStep * fileSize / maxSize;
     if (done != progress) {
       printf("%i%%\n", done * progStep);
       progress = done;
     }
   }
 
   return 0;
 }