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9ab5cda397
Shadowing core "I" is too messy. As soon as ed is loaded in memory, nothing else that isn't "i-aware" can be loaded anymore. I guess that's why "contexts" exist in Starting Forth, but adding this concept just for allowing the shadowing of core words seems overkill to me. Renaming I to i in ed seems better.
13 lines
530 B
Plaintext
13 lines
530 B
Plaintext
: _blen ( buf -- length of str in buf )
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DUP BEGIN C@+ 0x20 < UNTIL -^ 1- ;
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: _rbufsz ( size of linebuf to the right of curpos )
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EDPOS @ 64 MOD 63 -^ ;
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: _i ( i without _pln and _type. used in VE )
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_rbufsz IBUF _blen 2DUP > IF
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TUCK - ( ilen chars-to-move )
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SWAP EDPOS @ _cpos 2DUP + ( ctm ilen a a+ilen )
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3 PICK MOVE- ( ctm ilen ) NIP ( ilen )
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ELSE DROP 1+ ( ilen becomes rbuffsize+1 ) THEN
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DUP IBUF EDPOS @ _cpos ROT MOVE ( ilen ) EDPOS +! BLK!! ;
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: i IBUF _type _i EDPOS @ 64 / _pln ;
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