82 lines
2.4 KiB
Factor
82 lines
2.4 KiB
Factor
!:folding=indent:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2004 Slava Pestov.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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IN: errors
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USE: arithmetic
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USE: combinators
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USE: continuations
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USE: kernel
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USE: lists
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USE: namespaces
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USE: stack
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USE: stdio
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USE: strings
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USE: unparser
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USE: vectors
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! This is a very lightweight exception handling system.
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: catchstack* ( -- cs ) 6 getenv ;
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: catchstack ( -- cs ) catchstack* clone ;
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: set-catchstack* ( cs -- ) 6 setenv ;
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: set-catchstack ( cs -- ) clone set-catchstack* ;
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: kernel-error? ( obj -- ? )
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dup cons? [ car fixnum? ] [ drop f ] ifte ;
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: ?nth ( n list -- obj )
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dup >r length min 0 max r> nth ;
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: error# ( n -- str )
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[
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"Handle expired"
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"Undefined word"
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"Type check"
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"Array range check"
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"Underflow"
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] ?nth ;
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: kernel-error>str ( error -- )
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<% car error# % ": " % unparse % %> ;
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: error>str ( error -- str )
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dup kernel-error? [
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kernel-error>str
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] [
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unparse
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] ifte ;
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DEFER: >c
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DEFER: throw
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DEFER: default-error-handler
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: init-errors ( -- )
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64 <vector> set-catchstack*
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[ 1 exit* ] >c ( last resort )
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[ default-error-handler ] >c
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[ throw ] 5 setenv ( kernel calls on error ) ;
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