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115e430d02
Enable QBasic console mode usage and fix bugs in newline handling differences with C64 basic (cbm). To enable console mode for QBasic programs, have basicpp.py prefix the output with the QB64 specific console activation variables/functions. One change to basicpp.py to make this change more straightfowards is recursive includes so that includes can appear in more than just the top level step files. This allows us to conditionally include the right readline implementation. For QBasic in the special console mode (instead of the default full-screen UI mode) we need to use the LINE INPUT command in order to read input.
32 lines
787 B
QBasic
32 lines
787 B
QBasic
REM READLINE(A$) -> R$
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READLINE:
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EZ=0
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PRINT A$;
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C$="":R$="":C=0
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READCH:
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#cbm GET C$
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#qbasic C$=INKEY$
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IF C$="" THEN GOTO READCH
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C=ASC(C$)
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REM PRINT C
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#qbasic IF ASC(C$)=8 THEN C=20:C$=CHR$(20)
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IF C=4 OR C=0 THEN EZ=1:GOTO RL_DONE: REM EOF
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IF C=127 OR C=20 THEN GOSUB RL_BACKSPACE
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IF C=127 OR C=20 THEN GOTO READCH
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IF (C<32 OR C>127) AND C<>13 THEN GOTO READCH
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PRINT C$;
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IF LEN(R$)<255 AND C$<>CHR$(13) THEN R$=R$+C$
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IF LEN(R$)<255 AND C$<>CHR$(13) THEN GOTO READCH
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RL_DONE:
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RETURN
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REM Assumes R$ has input buffer
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RL_BACKSPACE:
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IF LEN(R$)=0 THEN RETURN
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R$=LEFT$(R$,LEN(R$)-1)
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#cbm PRINT CHR$(157)+" "+CHR$(157);
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#qbasic LOCATE ,POS(0)-1
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#qbasic PRINT " ";
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#qbasic LOCATE ,POS(0)-1
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RETURN
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