Module description

chr -- Char Data Type

The chr module implements words for checking ranges of characters and for converting characters.

ASCII constants

chr.nul ( -- char )

the null character

chr.soh ( -- char )

the soh character

chr.stx ( -- char )

the stx character

chr.etx ( -- char )

the etx character

chr.eot ( -- char )

the eot character

chr.enq ( -- char )

the enq character

chr.ack ( -- char )

the ack character

chr.bel ( -- char )

the bel character

chr.bs ( -- char )

the backspace character

chr.ht ( -- char )

the horz. tab character

chr.lf ( -- char )

the line feed character

chr.vt ( -- char )

the vert. tab character

chr.ff ( -- char )

the formfeed character

chr.cr ( -- char )

the carriage return character

chr.sm ( -- char )

the sm character

chr.si ( -- char )

the si character

chr.dle ( -- char )

the dle character

chr.dc1 ( -- char )

the dc1 character

chr.dc2 ( -- char )

the dc2 character

chr.dc3 ( -- char )

the dc3 character

chr.dc4 ( -- char )

the dc4 character

chr.nak ( -- char )

the nak character

chr.syn ( -- char )

the syn character

chr.etb ( -- char )

the etc character

chr.can ( -- char )

the cancel character

chr.em ( -- char )

the em character

chr.sub ( -- char )

the sub character

chr.esc ( -- char )

the escape character

chr.fs ( -- char )

the fs character

chr.gs ( -- char )

the gs character

chr.rs ( -- char )

the rs character

chr.us ( -- char )

the us character

chr.sp ( -- char )

the space character

chr.del ( -- char )

the delete character

Character class checking words

chr-range? ( char1 char2 char3 -- flag )

Check if char1 is in the range [char2..char3]

chr-lower? ( char -- flag )

Check for a lowercase alphabetic character

chr-upper? ( char -- flag )

Check for an uppercase alphabetic character

chr-alpha? ( char -- flag )

Check for an alphabetic character

chr-digit? ( char -- flag )

Check for a decimal digit character

chr-alnum? ( char -- flag )

Check for an alphanumeric character

chr-ascii? ( char -- flag )

Check for an ascii character

chr-blank? ( char -- flag )

Check for a blank character, space or tab

chr-cntrl? ( char -- flag )

Check for a control character, 0 till 31

chr-graph? ( char -- flag )

Check for a printable character except space

chr-print? ( char -- flag )

Check for a printable character including space

chr-punct? ( char -- flag )

Check for a printable character, but not a space or alphanumeric character

chr-space? ( char -- flag )

Check for a white-space: space, lf, vt, ff, cr

chr-hexdigit? ( char -- flag )

Check for a hexadecimal character

chr-octdigit? ( char -- flag )

Check for an octal character

chr-string? ( c-addr u char -- flag )

Check if the character is in the string

Character conversion words

chr-upper ( char1 -- char2 )

Convert char1 to uppercase

chr-lower ( char1 -- char2 )

Convert char1 to lowercase

chr-base ( char -- false | u true )

Convert the character to a digit according the current base

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