Function LoadRoom

roomedit/source/load.cpp:272–508

/ * LoadRoom: Load the room editor part of the room file, and set Vertices, * Linedefs, etc. * Return True on success. */

 *   Return True on success.
 */
BOOL LoadRoom(int infile)
{
   int i, j, temp;
	BYTE byte;
   long node_pos, cwall_pos, rwall_pos, sector_pos, thing_pos, sidedef_pos;

   // Check magic number and version
   for (i = 0; i < 4; i++)
      if (read(infile, &byte, 1) != 1 || byte != room_magic[i])
	 return FALSE;

   if (read(infile, &room_version, 4) != 4 || room_version > ROO_VERSION)
		return FALSE;

	// Skip room security check
	if (read(infile, &temp, 4) != 4) return FALSE;

	// Seek to main section of the file
	if (read(infile, &temp, 4) != 4) return FALSE;
	lseek(infile, temp, SEEK_SET);

	// Skip width and height
	if (read(infile, &temp, 4) != 4) return FALSE;
	if (read(infile, &temp, 4) != 4) return FALSE;

	// Read subsection locations
	if (read(infile, &node_pos, 4) != 4) return FALSE;
	if (read(infile, &cwall_pos, 4) != 4) return FALSE;
	if (read(infile, &rwall_pos, 4) != 4) return FALSE;
	if (read(infile, &sidedef_pos, 4) != 4) return FALSE;
	if (read(infile, &sector_pos, 4) != 4) return FALSE;
	if (read(infile, &thing_pos, 4) != 4) return FALSE;

	NumThings = 0;
	NumVertexes = 0;
	NumLineDefs = 0;
	NumSideDefs = 0;
	NumSectors = 0;
	NumFileSideDefs = 0;

	MapMaxX = MAP_MIN_X;
	MapMaxY = MAP_MIN_Y;
	MapMinX = MAP_MAX_X;
	MapMinY = MAP_MAX_Y;

	// *** Read linedefs
	lseek(infile, rwall_pos, SEEK_SET);
	if (read(infile, &NumLineDefs, 2) != 2) return FALSE;
	if (NumLineDefs < 1)
	{
		ProgError("While loading roo file it specified %d Line Defs",(int)NumLineDefs);
	}
   LineDefs = (LDPtr)GetMemory (NumLineDefs * sizeof (LineDef));
   SideDefs = (SDPtr)GetMemory (2 * NumLineDefs * sizeof (SideDef));
   Vertexes = (VPtr)GetMemory (2 * NumLineDefs * sizeof (Vertex));

   NumSideDefs = 2 * NumLineDefs;