\ ERRORE.FS English error strings 9may93jaw
\ Copyright (C) 1995,1996,1997,1998,1999,2000,2003,2006,2007 Free Software Foundation, Inc.
\ This file is part of Gforth.
\ Gforth 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 3
\ of the License, or (at your option) 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, see http://www.gnu.org/licenses/.
\ The errors are defined by a linked list, for easy adding
\ and deleting. Speed is not neccassary at this point.
AVariable ErrLink \ Linked list entry point
NIL ErrLink !
\ error numbers between -256 and -511 represent signals
\ signals are handled with strsignal
\ but some signals produce throw-codes > -256, e.g., -28
\ error numbers between -512 and -2047 are for OS errors and are
\ handled with strerror
has? OS [IF]
: >stderr ( -- )
r> outfile-id >r stderr to outfile-id
>exec r> to outfile-id ;
: error$ ( n -- addr u ) \ gforth
\G converts an error to a string
BEGIN @ dup
2dup cell+ @ =
2 cells + count rot drop EXIT THEN
[ has? os [IF] ]
dup -511 -255 within
256 + negate strsignal EXIT
dup -2047 -511 within
512 + negate strerror EXIT
[ [THEN] ]
base @ >r decimal
s>d tuck dabs <# #s rot sign s" error #" holds #> r> base ! ;
: .error ( n -- )
[ has? OS [IF] ]
[ [THEN] ]
error$ type ;