Char

Module with operation on CHAR type.

Const

NUL* = CHR(00H);

TAB* = CHR(09H);

LF* = CHR(0AH);

CR* = CHR(0DH);

SPC* = CHR(020H);

Procedures

IsControl

PROCEDURE IsControl* (ch: CHAR) : BOOLEAN ;

IsDigit

Returns true of ch is a digit

PROCEDURE IsDigit* (ch: CHAR) : BOOLEAN ;

IsLetter

Returns true of ch is a letter

PROCEDURE IsLetter* (ch: CHAR) : BOOLEAN ;

IsSpace

Returns true of ch is a white space character

PROCEDURE IsSpace* (ch: CHAR) : BOOLEAN ;

IsLower

Returns true of ch is a lower case letter

PROCEDURE IsLower* (ch: CHAR) : BOOLEAN ;

IsUpper

Returns true of ch is a upper case letter

PROCEDURE IsUpper* (ch: CHAR) : BOOLEAN ;

Lower

Returns lower case letter or unmodified char

PROCEDURE Lower* (ch: CHAR) : CHAR ;

Upper

Returns upper case letter or unmodified char

PROCEDURE Upper* (ch: CHAR) : CHAR ;