some useful macros

include/global.hpp

@@ -0,0 +1,57 @@
+/* This file is part of Mapnik (c++ mapping toolkit)
+ * Copyright (C) 2005 Artem Pavlenko
+ *
+ * Mapnik 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 any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+//$Id$
+
+#ifndef GLOBAL_HPP
+#define GLOBAL_HPP
+
+#include <boost/cstdint.hpp>
+
+namespace mapnik
+{
+    using namespace boost;
+#define int2net(A)  (int32_t) (((uint32_t) ((uint8_t) (A)[1]))      |\
+			      (((uint32_t) ((uint8_t) (A)[0])) << 8))
+
+#define int4net(A)  (int32_t) (((uint32_t) ((uint8_t) (A)[3]))      |\
+			    (((uint32_t) ((uint8_t) (A)[2])) << 8)  |\
+			    (((uint32_t) ((uint8_t) (A)[1])) << 16) |\
+			    (((uint32_t) ((uint8_t) (A)[0])) << 24))
+
+
+    typedef char byte;
+#define float8net(V,M)   do { double def_temp;\
+                              ((byte*) &def_temp)[0]=(M)[7];\
+                              ((byte*) &def_temp)[1]=(M)[6];\
+                              ((byte*) &def_temp)[2]=(M)[5];\
+                              ((byte*) &def_temp)[3]=(M)[4];\
+                              ((byte*) &def_temp)[4]=(M)[3];\
+                              ((byte*) &def_temp)[5]=(M)[2];\
+                              ((byte*) &def_temp)[6]=(M)[1];\
+                              ((byte*) &def_temp)[7]=(M)[0];\
+                              (V) = def_temp; } while(0)
+#define float4net(V,M)   do { float def_temp;\
+                              ((byte*) &def_temp)[0]=(M)[3];\
+                              ((byte*) &def_temp)[1]=(M)[2];\
+                              ((byte*) &def_temp)[2]=(M)[1];\
+                              ((byte*) &def_temp)[3]=(M)[0];\
+                              (V)=def_temp; } while(0)
+}
+
+#endif //GLOBAL_HPP