collapseos/blk/108
2020-05-22 14:19:02 -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
IBUF _type _rbufsz IBUF _blen 2DUP > IF
SWAP OVER - ( 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 +! EDPOS @ 64 / _pln
;