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Exception handling for threads

    1: \ smart .s                                             09mar2012py
    2: 
    3: \ Copyright (C) 2012 Free Software Foundation, Inc.
    4: 
    5: \ This file is part of Gforth.
    6: 
    7: \ Gforth is free software; you can redistribute it and/or
    8: \ modify it under the terms of the GNU General Public License
    9: \ as published by the Free Software Foundation, either version 3
   10: \ of the License, or (at your option) any later version.
   11: 
   12: \ This program is distributed in the hope that it will be useful,
   13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15: \ GNU General Public License for more details.
   16: 
   17: \ You should have received a copy of the GNU General Public License
   18: \ along with this program. If not, see http://www.gnu.org/licenses/.
   19: 
   20: \ idea: Gerald Wodni
   21: 
   22: : addr? ( addr -- flag )
   23:     TRY  @  IFERROR  2drop  false nothrow  ELSE  drop  true  THEN   ENDTRY ;
   24: 
   25: : string? ( addr u -- flag )
   26:     TRY  bounds ?DO  I c@ bl < IF  -1 throw  THEN  LOOP
   27: 	IFERROR  2drop drop false nothrow ELSE  true  THEN  ENDTRY ;
   28: 
   29: : .string. ( addr u -- )
   30:     .\" s\" " type '"' emit space ;
   31: : .addr. ( addr -- )  hex. ;
   32: 
   33: Variable smart.s-skip
   34: 
   35: : smart.s. ( n -- )
   36:     smart.s-skip @  smart.s-skip off IF  drop  EXIT  THEN
   37:     over r> i swap >r -
   38:     dup 1 = IF  false  ELSE  pick  2dup string?  THEN  IF
   39: 	.string. smart.s-skip on
   40:     ELSE  drop dup addr? IF  .addr.
   41: 	ELSE  .  THEN
   42:     THEN ;
   43: 
   44: ' smart.s. IS .s.