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\ **
\ ** Prefix words for ficl
\ ** submitted by Larry Hastings, larry@hastings.org
\ **
\ (jws) To make a prefix, simply create a new definition in the <prefixes>
\ wordlist. start-prefixes and end-prefixes handle the bookkeeping
\
\ $FreeBSD: release/9.1.0/sys/boot/ficl/softwords/prefix.fr 167850 2007-03-23 22:26:01Z jkim $
variable save-current
: start-prefixes get-current save-current ! <prefixes> set-current ;
: end-prefixes save-current @ set-current ;
: show-prefixes <prefixes> >search words search> drop ;
\ #if (FICL_EXTENDED_PREFIX)
start-prefixes
\ define " (double-quote) as an alias for s", and make it a prefix
: " postpone s" ; immediate
\ make .( a prefix (we just create an alias for it in the prefixes list)
: .( postpone .( ; immediate
\ make \ a prefix, and add // (same thing) as a prefix too
\ (jws) "//" is precompiled to save aggravation with Perl
\ : // postpone \ ; immediate
\ ** add 0b, 0o, 0d, and 0x as prefixes
\ ** these temporarily shift the base to 2, 8, 10, and 16 respectively
\ ** and consume the next number in the input stream, pushing/compiling
\ ** as normal
\ (jws) __tempbase is precompiled, as are 0x and 0d - see prefix.c
\
\ : __tempbase { newbase | oldbase -- }
\ base @ to oldbase
\ newbase base !
\ 0 0 parse-word >number 2drop drop
\ oldbase base !
\ ;
: 0b 2 __tempbase ; immediate
: 0o 8 __tempbase ; immediate
\ : 0d 10 __tempbase ; immediate
\ "0d" add-prefix
\ : 0x 16 __tempbase ; immediate
\ "0x" add-prefix
end-prefixes
\ #endif