gforth/string.fs - diff

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version 1.16, 2012/08/17 22:24:27	version 1.17, 2012/08/17 22:35:27
Line 85	Line 85

\ string array words	\ string array words

: $[] { n addr -- addr' }	: $[] ( n addr -- addr' ) >r
addr @ 0= IF s" " addr $! THEN	r@ @ 0= IF s" " r@ $! THEN
addr $@ n cells /string	r@ $@ 2 pick cells /string
dup cell < IF	dup cell < IF
2drop addr $@len	2drop r@ $@len
n 1+ cells addr $!len	over 1+ cells r@ $!len
addr $@ rot /string erase	r@ $@ rot /string 0 fill
addr $@ n cells /string	r@ $@ 2 pick cells /string
THEN drop ;	THEN drop nip rdrop ;

: $[]! ( addr u n $addr -- ) $[] $! ;	: $[]! ( addr u n $addr -- ) $[] $! ;
: $[]+! ( addr u n $addr -- ) $[] $+! ;	: $[]+! ( addr u n $addr -- ) $[] $+! ;
: $[]@ ( n $addr -- addr u ) $[] dup @ IF $@ ELSE drop s" " THEN ;	: $[]@ ( n $addr -- addr u ) $[] dup @ IF $@ ELSE drop s" " THEN ;

: $over { addr u $addr off -- }	: $over ( addr u $addr off -- )
\G overwrite string at offset off with addr u	\G overwrite string at offset off with addr u
$addr @ 0= IF s" " $addr $! THEN	swap >r
$addr $@len u off + < IF	r@ @ 0= IF s" " r@ $! THEN
$addr $@len dup	2dup + r@ $@len > IF
u off + max $addr $!len	2dup + r@ $@len tuck max r@ $!len
$addr $@ rot /string bl fill	r@ $@ rot /string bl fill
THEN	THEN
addr $addr $@ off /string u min move ;	r> $@ rot /string rot min move ;
[THEN]	[THEN]