@node Ctype
@chapter Character Type Macros and Functions (@file{ctype.h})
This chapter groups macros (which are also available as subroutines)
to classify characters into several categories (alphabetic,
numeric, control characters, whitespace, and so on), or to perform
simple character mappings.

The header file @file{ctype.h} defines the macros.
@menu 
* isalnum::   Alphanumeric character predicate
* isalpha::   Alphabetic character predicate
* isascii::   ASCII character predicate
* iscntrl::   Control character predicate
* isdigit::   Decimal digit predicate
* islower::   Lower-case character predicate
* isprint::   Printable character predicates (isprint, isgraph)
* ispunct::   Punctuation character predicate
* isspace::   Whitespace character predicate
* isupper::   Uppercase character predicate
* isxdigit::  Hexadecimal digit predicate
* toascii::   Force integers to ASCII range
* tolower::   Translate characters to lower case
* toupper::   Translate characters to upper case
* iswalnum::  Alphanumeric wide-character predicate
* iswalpha::  Alphabetic wide-character predicate
* iswcntrl::  Control wide-character predicate
* iswdigit::  Decimal digit wide-character predicate
* iswgraph::  Graphic wide-character predicate
* iswlower::  Lower-case wide-character predicate
* iswprint::  Printable wide-character predicate
* iswpunct::  Punctuation wide-character predicate
* iswspace::  Whitespace wide-character predicate
* iswupper::  Uppercase wide-character predicate
* iswxdigit:: Hexadecimal digit wide-character predicate
* iswctype::  Extensible wide-character test
* wctype::    Compute wide-character test type
* towlower::  Translate wide-characters to lower case
* towupper::  Translate wide-characters to upper case
* towctrans:: Extensible wide-character case mapping
* wctrans::   Compute wide-character translation type
@end menu

@page
@include ctype/isalnum.def

@page
@include ctype/isalpha.def

@page
@include ctype/isascii.def

@page
@include ctype/iscntrl.def

@page
@include ctype/isdigit.def

@page
@include ctype/islower.def

@page
@include ctype/isprint.def

@page
@include ctype/ispunct.def

@page
@include ctype/isspace.def

@page
@include ctype/isupper.def

@page
@include ctype/isxdigit.def

@page
@include ctype/toascii.def

@page
@include ctype/tolower.def

@page
@include ctype/toupper.def

@page
@include ctype/iswalnum.def

@page
@include ctype/iswalpha.def

@page
@include ctype/iswcntrl.def

@page
@include ctype/iswdigit.def

@page
@include ctype/iswgraph.def

@page
@include ctype/iswlower.def

@page
@include ctype/iswprint.def

@page
@include ctype/iswpunct.def

@page
@include ctype/iswspace.def

@page
@include ctype/iswupper.def

@page
@include ctype/iswxdigit.def

@page
@include ctype/iswctype.def

@page
@include ctype/wctype.def

@page
@include ctype/towlower.def

@page
@include ctype/towupper.def

@page
@include ctype/towctrans.def

@page
@include ctype/wctrans.def


