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17 lines
622 B
Plaintext
17 lines
622 B
Plaintext
: (rdlnc) ( -- c )
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( buffer overflow? same as if we typed a newline )
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IN> @ IN) = IF 0x0a ELSE KEY THEN ( c )
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DUP 0x7f = IF DROP 0x8 THEN ( del? same as backspace )
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DUP 0x0a = IF DROP 0xd THEN ( lf? same as cr )
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( bacspace? handle and exit )
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DUP 0x8 = IF (inbs) EXIT THEN
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( echo back )
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DUP EMIT ( c )
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( write and advance )
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DUP ( keep as result ) ( c c )
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( We take advantage of the fact that c's MSB is always zero and
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thus ! automatically null-terminates our string )
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IN> @ ! 1 IN> +! ( c )
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( if newline, replace with zero to indicate EOL )
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DUP 0xd = IF DROP 0 THEN ;
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