File:  [gforth] / gforth / kernel / errore.fs
Revision 1.17: download - view: text, annotated - select for diffs
Sat Jun 23 20:38:01 2012 UTC (9 years, 3 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Factored .error into error$ and usage

    1: \ ERRORE.FS English error strings                      9may93jaw
    2: 
    3: \ Copyright (C) 1995,1996,1997,1998,1999,2000,2003,2006,2007 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: 
   21: \ The errors are defined by a linked list, for easy adding
   22: \ and deleting. Speed is not neccassary at this point.
   23: 
   24: require ./io.fs
   25: require ./nio.fs
   26: 
   27: AVariable ErrLink              \ Linked list entry point
   28: NIL ErrLink !
   29: 
   30: decimal
   31: 
   32: \ error numbers between -256 and -511 represent signals
   33: \ signals are handled with strsignal
   34: \ but some signals produce throw-codes > -256, e.g., -28
   35: 
   36: \ error numbers between -512 and -2047 are for OS errors and are
   37: \ handled with strerror
   38: 
   39: has? OS [IF]
   40: : >stderr ( -- )
   41:     r> outfile-id >r stderr to outfile-id
   42:     >exec  r> to outfile-id ;
   43: [THEN]
   44: 
   45: : error$ ( n -- addr u ) \ gforth
   46:     \G converts an error to a string
   47:     ErrLink
   48:     BEGIN @ dup
   49:     WHILE
   50: 	2dup cell+ @ =
   51: 	IF
   52: 	    2 cells + count rot drop EXIT THEN
   53:     REPEAT
   54:     drop
   55: [ has? os [IF] ]
   56:     dup -511 -255 within
   57:     IF
   58: 	256 + negate strsignal EXIT
   59:     THEN
   60:     dup -2047 -511 within
   61:     IF
   62: 	512 + negate strerror EXIT
   63:     THEN
   64: [ [THEN] ]
   65:     base @ >r decimal
   66:     s>d tuck dabs <# #s rot sign s" error #" holds #> r> base ! ;
   67: 
   68: : .error ( n -- )
   69: [ has? OS [IF] ]
   70:     >stderr
   71: [ [THEN] ]
   72:     error$ type ;

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