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# Characters

Function: NAME-CHAR (name)
  Package:LISP

  Given an argument acceptable to string, Returns a character object whose name is NAME if one exists. Returns NIL otherwise. NAME must be an object that can be coerced to a string.

Function: CHAR-NAME (char)
  Package:LISP

  Returns the name for CHAR as a string; NIL if CHAR has no name. Only #\Backspace, #\Tab, #\Newline (or #\Linefeed), #\Page, #\Return, and #\Rubout have names.

Function: BOTH-CASE-P (char)
  Package:LISP

  Returns T if CHAR is an alphabetic character; NIL otherwise. Equivalent to ALPHA-CHAR-P.

Function: SCHAR (simple-string index)
  Package:LISP

  Returns the character object representing the INDEX-th character in STRING. This is faster than CHAR.

Constant: CHAR-SUPER-BIT
  Package:LISP The bit that indicates a super character.

Constant: CHAR-FONT-LIMIT
  Package:LISP The upper exclusive bound on values produced by CHAR-FONT.

Function: CHAR-DOWNCASE (char)
  Package:LISP

  Returns the lower-case equivalent of CHAR, if any. If not, simply returns CHAR.

Function: STRING-CHAR-P (char)
  Package:LISP

  Returns T if CHAR can be stored in a string. In GCL, this function always returns T since any character in GCL can be stored in a string.

Function: CHAR-NOT-LESSP (char &rest more-chars)
  Package:LISP

  Returns T if the codes of CHARs are in strictly non-increasing order; NIL otherwise. For a lower-case character, the code of its upper-case equivalent is used.

Function: DISASSEMBLE (thing)
  Package:LISP

  Compiles the form specified by THING and prints the intermediate C language code for that form. But does NOT install the result of compilation. If THING is a symbol that names a not-yet-compiled function, the function definition is disassembled. If THING is a lambda expression, it is disassembled as a function definition. Otherwise, THING itself is disassembled as a top-level form.

Function: LOWER-CASE-P (char)
  Package:LISP

  Returns T if CHAR is a lower-case character; NIL otherwise.

Function: CHAR<= (char &rest more-chars)
  Package:LISP

  Returns T if the codes of CHARs are in strictly non-decreasing order; NIL otherwise.

Constant: CHAR-HYPER-BIT
  Package:LISP The bit that indicates a hyper character.

Function: CODE-CHAR (code &optional (bits 0) (font 0))
  Package:LISP

  Returns a character object with the specified code, if any. If not, returns NIL.

Function: CHAR-CODE (char)
  Package:LISP

  Returns the code attribute of CHAR.

Constant: CHAR-CONTROL-BIT
  Package:LISP The bit that indicates a control character.

Function: CHAR-LESSP (char &rest more-chars)
  Package:LISP

  Returns T if the codes of CHARs are in strictly increasing order; NIL otherwise. For a lower-case character, the code of its upper-case equivalent is used.

Function: CHAR-FONT (char)
  Package:LISP

  Returns the font attribute of CHAR.

Function: CHAR< (char &rest more-chars)
  Package:LISP

  Returns T if the codes of CHARs are in strictly increasing order; NIL otherwise.

Function: CHAR>= (char &rest more-chars)
  Package:LISP

  Returns T if the codes of CHARs are in strictly non-increasing order; NIL otherwise.

Constant: CHAR-META-BIT
  Package:LISP The bit that indicates a meta character.

Function: GRAPHIC-CHAR-P (char)
  Package:LISP

  Returns T if CHAR is a printing character, i.e., #\Space through #\~; NIL otherwise.

Function: CHAR-NOT-EQUAL (char &rest more-chars)
  Package:LISP

  Returns T if no two of CHARs are the same character; NIL otherwise. Upper case character and its lower case equivalent are regarded the same.

Constant: CHAR-BITS-LIMIT
  Package:LISP The upper exclusive bound on values produced by CHAR-BITS.

Function: CHARACTERP (x)
  Package:LISP

  Returns T if X is a character; NIL otherwise.

Function: CHAR= (char &rest more-chars)
  Package:LISP

  Returns T if all CHARs are the same character; NIL otherwise.

Function: ALPHA-CHAR-P (char)
  Package:LISP

  Returns T if CHAR is an alphabetic character, A-Z or a-z; NIL otherwise.

Function: UPPER-CASE-P (char)
  Package:LISP

  Returns T if CHAR is an upper-case character; NIL otherwise.

Function: CHAR-BIT (char name)
  Package:LISP

  Returns T if the named bit is on in the character CHAR; NIL otherwise. In GCL, this function always returns NIL.

Function: MAKE-CHAR (char &optional (bits 0) (font 0))
  Package:LISP

  Returns a character object with the same code attribute as CHAR and with the specified BITS and FONT attributes.

Function: CHARACTER (x)
  Package:LISP

  Coerces X into a character object if possible.

Function: CHAR-EQUAL (char &rest more-chars)
  Package:LISP

  Returns T if all of its arguments are the same character; NIL otherwise. Upper case character and its lower case equivalent are regarded the same.

Function: CHAR-NOT-GREATERP (char &rest more-chars)
  Package:LISP

  Returns T if the codes of CHARs are in strictly non-decreasing order; NIL otherwise. For a lower-case character, the code of its upper-case equivalent is used.

Function: CHAR> (char &rest more-chars)
  Package:LISP

  Returns T if the codes of CHARs are in strictly decreasing order; NIL otherwise.

Function: STANDARD-CHAR-P (char)
  Package:LISP

  Returns T if CHAR is a standard character, i.e., one of the 95 ASCII printing characters #\Space to #\~ and #Newline; NIL otherwise.

Function: CHAR-UPCASE (char)
  Package:LISP

  Returns the upper-case equivalent of CHAR, if any. If not, simply returns CHAR.

Function: DIGIT-CHAR-P (char &optional (radix 10))
  Package:LISP

  If CHAR represents a digit in RADIX, then returns the weight as an integer. Otherwise, returns nil.

Function: CHAR/= (char &rest more-chars)
  Package:LISP

  Returns T if no two of CHARs are the same character; NIL otherwise.

Function: CHAR-GREATERP (char &rest more-chars)
  Package:LISP

  Returns T if the codes of CHARs are in strictly decreasing order; NIL otherwise. For a lower-case character, the code of its upper-case equivalent is used.

Function: ALPHANUMERICP (char)
  Package:LISP

  Returns T if CHAR is either numeric or alphabetic; NIL otherwise.

Function: CHAR-BITS (char)
  Package:LISP

  Returns the bits attribute (which is always 0 in GCL) of CHAR.

Function: DIGIT-CHAR (digit &optional (radix 10) (font 0))
  Package:LISP

  Returns a character object that represents the DIGIT in the specified RADIX. Returns NIL if no such character exists.

Function: SET-CHAR-BIT (char name newvalue)
  Package:LISP

  Returns a character just like CHAR except that the named bit is set or cleared, according to whether NEWVALUE is non-NIL or NIL. This function is useless in GCL.

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