ground/uavobjgenerator/generators/generator_io.cpp

   1 /**
   2  ******************************************************************************
   3  *
   4  * @file       generator_io.cpp
   5  * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
   6  * @brief      I/O Code for the generator
   7  *
   8  * @see        The GNU Public License (GPL) Version 3
   9  *
  10  *****************************************************************************/
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 3 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  19  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  20  * for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License along
  23  * with this program; if not, write to the Free Software Foundation, Inc.,
  24  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  */
  26
  27 #include "generator_io.h"
  28
  29 using namespace std;
  30
  31 /**
  32  * Read a file and return its contents as a string
  33  */
  34 QString readFile(QString name, bool do_warn)
  35 {
  36     QFile file(name);
  37
  38     if (!file.open(QFile::ReadOnly)) {
  39         if (do_warn) {
  40             std::cout << "Warning: Could not open " << name.toStdString() << endl;
  41         }
  42         return QString();
  43     }
  44
  45     QTextStream fileStr(&file);
  46     QString str = fileStr.readAll();
  47     file.close();
  48     return str;
  49 }
  50
  51 /**
  52  * Read a file and return its contents as a string
  53  */
  54 QString readFile(QString name)
  55 {
  56     return readFile(name, true);
  57 }
  58
  59 /**
  60  * Write contents of string to file
  61  */
  62 bool writeFile(QString name, QString & str)
  63 {
  64     QFile file(name);
  65
  66     if (!file.open(QFile::WriteOnly)) {
  67         return false;
  68     }
  69     QTextStream fileStr(&file);
  70     fileStr << str;
  71     file.close();
  72     return true;
  73 }
  74
  75 /**
  76  * Write contents of string to file if the content changes
  77  */
  78 bool writeFileIfDifferent(QString name, QString & str)
  79 {
  80     if (str == readFile(name, false)) {
  81         return true;
  82     }
  83     return writeFile(name, str);
  84 }