[GRASS] raster import blocking read for Windows

blazek · blazek · commit ab7828e90bb6 · 2015-05-28T23:47:31.000+02:00
diff --git a/src/providers/grass/qgis.r.in.cpp b/src/providers/grass/qgis.r.in.cpp
@@ -62,6 +62,62 @@ extern "C"
 #define G_unopen_cell Rast_unopen
 #endif
 
+// Bad, bad, bad
+// http://lists.qt-project.org/pipermail/interest/2012-May/002110.html
+// http://lists.qt-project.org/pipermail/interest/2012-May/002117.html
+// TODO: This is just test if it works on Windows
+QByteArray readData( QFile & file, quint32 size )
+{
+  QByteArray byteArray;
+  forever
+  {
+    byteArray += file.read( size - byteArray.size() );
+    if ( byteArray.size() == size )
+    {
+      break;
+    }
+  }
+  return byteArray;
+}
+
+bool readBool( QFile & file )
+{
+  QDataStream dataStream( readData( file, sizeof( bool ) ) );
+  bool value;
+  dataStream >> value;
+  return value;
+}
+
+qint32 readQint32( QFile & file )
+{
+  QDataStream dataStream( readData( file, sizeof( qint32 ) ) );
+  qint32 value;
+  dataStream >> value;
+  return value;
+}
+
+quint32 readQuint32( QFile & file )
+{
+  QDataStream dataStream( readData( file, sizeof( quint32 ) ) );
+  quint32 value;
+  dataStream >> value;
+  return value;
+}
+
+QgsRectangle readRectangle( QFile & file )
+{
+  QDataStream dataStream( readData( file, 4*sizeof( double ) ) );
+  QgsRectangle rectangle;
+  dataStream >> rectangle;
+  return rectangle;
+}
+
+QByteArray readByteArray( QFile & file )
+{
+  quint32 size = readQuint32( file );
+  return readData( file, size );
+}
+
 int main( int argc, char **argv )
 {
   char *name;
@@ -82,15 +138,18 @@ int main( int argc, char **argv )
 
   QFile stdinFile;
   stdinFile.open( stdin, QIODevice::ReadOnly );
-  QDataStream stdinStream( &stdinFile );
+  //QDataStream stdinStream( &stdinFile );
 
   QFile stdoutFile;
   stdoutFile.open( stdout, QIODevice::WriteOnly );
   QDataStream stdoutStream( &stdoutFile );
 
   QgsRectangle extent;
   qint32 rows, cols;
-  stdinStream >> extent >> cols >> rows;
+  //stdinStream >> extent >> cols >> rows;
+  extent = readRectangle( stdinFile );
+  cols = readQint32( stdinFile );
+  rows = readQint32( stdinFile );
 
   QString err = QgsGrass::setRegion( &window, extent, rows, cols );
   if ( !err.isEmpty() )
@@ -102,7 +161,8 @@ int main( int argc, char **argv )
 
   QGis::DataType qgis_type;
   qint32 type;
-  stdinStream >> type;
+  //stdinStream >> type;
+  type = readQint32( stdinFile );
   qgis_type = ( QGis::DataType )type;
 
   RASTER_MAP_TYPE grass_type;
@@ -136,15 +196,16 @@ int main( int argc, char **argv )
   QByteArray byteArray;
   for ( int row = 0; row < rows; row++ )
   {
-    stdinStream >> isCanceled;
+    //stdinStream >> isCanceled;
+    isCanceled = readBool( stdinFile );
     if ( isCanceled )
     {
       break;
     }
-    stdinStream >> byteArray;
+    byteArray = readByteArray( stdinFile );
     if ( byteArray.size() != expectedSize )
     {
-      G_fatal_error( "Wrong byte array size, expected %d bytes, got %d", expectedSize, byteArray.size() );
+      G_fatal_error( "Wrong byte array size, expected %d bytes, got %d, row %d / %d", expectedSize, byteArray.size(), row, rows );
       return 1;
     }
 
@@ -175,6 +236,7 @@ int main( int argc, char **argv )
     stdoutStream << ( bool )true; // row written
     stdoutFile.flush();
   }
+  //G_fatal_error( "%s", msg.toAscii().data() );
 
   if ( isCanceled )
   {
