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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.
17 lines
654 B
Plaintext
17 lines
654 B
Plaintext
: $f EDPOS @ PREVPOS @ 2DUP = IF 2DROP EXIT THEN
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2DUP > IF DUP pos! SWAP THEN
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( p1 p2, p1 < p2 ) OVER - 64 MIN ( pos len ) FBUF _zbuf
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SWAP _cpos FBUF ( len src dst ) ROT MOVE ;
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: $R ( replace mode )
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mode! 'R' EMIT
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BEGIN setpos KEY DUP BS? IF -1 EDPOS +! DROP 0 THEN
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DUP 0x20 >= IF
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DUP EMIT EDPOS @ _cpos C! 1 EDPOS +! BLK!! 0
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THEN UNTIL mode! SPC contents ;
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: $O EDPOS @ 0x3c0 ( 15 * 64 ) >= IF EXIT THEN
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_U EDPOS @ 0x3c0 AND DUP pos! _cpos _zbuf BLK!! contents ;
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: $o EDPOS @ 64 < IF EXIT THEN EDPOS @ 64 + EDPOS ! $O ;
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: $D $H 64 icpy
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acc@ 0 DO 16 EDPOS @ 64 / DO I _mvln- LOOP LOOP
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BLK!! contents ;
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