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collapseos/blk/108
2020-06-05 13:54:45 -04:00

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: _blen ( buf -- length of str in buf )
DUP BEGIN C@+ EOL? UNTIL -^ 1- ;
: _rbufsz ( size of linebuf to the right of curpos )
EDPOS @ 64 MOD 63 -^ ;
: i COMPILE I ; IMMEDIATE ( save overshadowed )
: _I ( I without _pln. used in VE )
IBUF _type _rbufsz IBUF _blen 2DUP > IF
TUCK - ( ilen chars-to-move )
SWAP EDPOS @ _cpos 2DUP + ( ctm ilen a a+ilen )
3 PICK MOVE- ( ctm ilen )
NIP ( ilen )
ELSE DROP ( ilen becomes rbuffsize )
THEN
DUP IBUF EDPOS @ _cpos ROT MOVE ( ilen ) EDPOS +! BLK!! ;
: I _I EDPOS @ 64 / _pln ;