[openvrml-commit] openvrml/src/libopenvrml/openvrml vrml97node.cpp, 1.123, 1.124

[Braden M. <br...@us...>]

Update of /cvsroot/openvrml/openvrml/src/libopenvrml/openvrml
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv3282/src/libopenvrml/openvrml

Modified Files:
	vrml97node.cpp 
Log Message:
Guard against the possibility that this function is called when the number of bytes in the backtrack buffer should remain zero.

Index: vrml97node.cpp
===================================================================
RCS file: /cvsroot/openvrml/openvrml/src/libopenvrml/openvrml/vrml97node.cpp,v
retrieving revision 1.123
retrieving revision 1.124
diff -C2 -d -r1.123 -r1.124
*** vrml97node.cpp	6 Mar 2007 07:24:01 -0000	1.123
--- vrml97node.cpp	12 Mar 2007 14:43:52 -0000	1.124
***************
*** 7140,7156 ****
              source_mgr.bytes_in_buffer + reader.bytes_in_backtrack_buffer;
  
!         reader.backtrack_buffer.resize(bytes_now_in_backtrack_buffer);
! 
!         reader.backtrack_buffer.resize(bytes_now_in_backtrack_buffer);
  
!         std::copy(source_mgr.next_input_byte,
!                   source_mgr.next_input_byte + source_mgr.bytes_in_buffer,
!                   reader.backtrack_buffer.begin()
!                   + reader.bytes_in_backtrack_buffer);
  
!         source_mgr.next_input_byte = &*(reader.backtrack_buffer.begin()
!                                         + reader.bytes_in_backtrack_buffer
!                                         - reader.backtrack_buffer_bytes_unread);
!         source_mgr.bytes_in_buffer += reader.backtrack_buffer_bytes_unread;
          reader.bytes_in_backtrack_buffer = bytes_now_in_backtrack_buffer;
          reader.reading = true;
--- 7140,7157 ----
              source_mgr.bytes_in_buffer + reader.bytes_in_backtrack_buffer;
  
!         if (bytes_now_in_backtrack_buffer > 0) {
!             reader.backtrack_buffer.resize(bytes_now_in_backtrack_buffer);
  
!             std::copy(source_mgr.next_input_byte,
!                       source_mgr.next_input_byte + source_mgr.bytes_in_buffer,
!                       reader.backtrack_buffer.begin()
!                       + reader.bytes_in_backtrack_buffer);
  
!             source_mgr.next_input_byte =
!                 &*(reader.backtrack_buffer.begin()
!                    + reader.bytes_in_backtrack_buffer
!                    - reader.backtrack_buffer_bytes_unread);
!             source_mgr.bytes_in_buffer += reader.backtrack_buffer_bytes_unread;
!         }
          reader.bytes_in_backtrack_buffer = bytes_now_in_backtrack_buffer;
          reader.reading = true;