Create your own text control codes: Difference between revisions
Create your own text control codes (view source)
Revision as of 13:34, 29 November 2021
, 2 years ago→{{header|PL/M}}: Tweak
(→{{header|PL/M}}: Bug fix and tweaks) |
(→{{header|PL/M}}: Tweak) |
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=={{header|PL/M}}==
PL/M doesn't have a standard printf function
This sample implements a PRINTF procedure somewhat like the standard C library routine.<br><br>
Although CP/M uses ASCII, Kildall's original 8080 PL/M compiler only supports a limited character set for the program's source. In particular the compiler doesn't like lowercase letters, % or \. PL/M also requires procedures to be called with the same number of parameters they were defined with. The PRINTF defined here has the format string plus seven parameters, if fewer parameters are required, additional dummy parameters must be supplied<br>
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DECLARE B BYTE;
DECLARE D BYTE;
IF ( D := SHR( B, 4 ) ) > 9 THEN CALL PR$CHAR( ( D - 10 ) + 'A' );
ELSE CALL PR$CHAR( D + '0' );▼
IF D > 9▼
IF ( D := B AND 0FH ) > 9 THEN CALL PR$CHAR( ( D - 10 ) + 'A' );
ELSE CALL PR$CHAR( D + '0' );
▲ ELSE CALL PR$CHAR( D + '0' );
END PR$HEX ;
/* RETURNS A CONVERTED TO LOWERCASE, IF NECESSARY */
TO$LOWER: PROCEDURE( A )BYTE;
END TO$LOWER;
DECLARE FRAME LITERALLY '''/''';
DECLARE P ( 7 )ADDRESS;
DECLARE FPTR ADDRESS;
DECLARE ( PPOS, FCH BASED FPTR, IN$LOWERCASE ) BYTE;
P( 0 ) = A; P( 1 ) = B; P( 2 ) = C; P( 3 ) = D;
P( 4 ) = E; P( 5 ) = F; P( 6 ) = G;
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FPTR = FMT;
DO WHILE( FCH <> '$' );
IF FCH <> FRAME THEN DO; /* NOT A FORMAT FRAME */
CALL PR$CHAR( FCH );
END;
ELSE DO; /* IS A FORMAT FRAME */
FPTR = FPTR + 1;
IF ( IN$LOWERCASE
IF FCH =
ELSE
END;
ELSE
DECLARE SPTR ADDRESS;
DECLARE SCH BASED SPTR BYTE;
SPTR = P( PPOS );
DO WHILE(
SPTR = SPTR + 1;
END;
▲ IF V >= 'A' AND V <= 'Z' THEN V = V + 32;
END;
PPOS = PPOS + 1;
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PPOS = PPOS + 1;
END;
ELSE IF FCH = 'O' THEN DO; /* UNSIGNED OCTAL INTEGER */
CALL PR$OCTAL( P( PPOS ) );
PPOS = PPOS + 1;
END;
ELSE IF FCH = 'N' THEN DO; /* NEWLINE */
CALL PR$NL;
END;
ELSE DO; /* ANYTHING ELSE - JUST PRINT IT */
CALL PR$CHAR( FCH );
END /* IF VARIOUS FRAMES;; */ ;
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END PRINTF ;
/* TEST PRINTF */
DECLARE ( P3, P4, P5, P6, P7 ) ADDRESS;
P3 = 301; P4, P5, P6 = 0;
P3 = - P3; P4 = P4 - 1; P5 = P5 - 2; P6 = P6 - 3; P7 = 65535;
CALL PRINTF( .'HELLO, /S/C /I/$ /D /U /X./N(END)/O/N$'
, .'WORLD$', 33, P3, P4, P5, P6, P7
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, 'E', 'L', 'L', 'O', .'ORLD$', 33, 0
);
EOF</lang>
{{out}}
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