huschi.net

ctype.h(0P)                POSIX Programmer's Manual               ctype.h(0P)
PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
NAME
       ctype.h -- character types
SYNOPSIS
       #include <ctype.h>
DESCRIPTION
       Some of the functionality described on this reference page extends  the
       ISO C  standard. Applications shall define the appropriate feature test
       macro (see the System Interfaces volume of POSIX.1-2008,  Section  2.2,
       The  Compilation Environment) to enable the visibility of these symbols
       in this header.
       The <ctype.h> header shall define the locale_t  type  as  described  in
       <locale.h>, representing a locale object.
       The following shall be declared as functions and may also be defined as
       macros. Function prototypes shall be provided for use with ISO C  stan-
       dard compilers.
           int   isalnum(int);
           int   isalnum_l(int, locale_t);
           int   isalpha(int);
           int   isalpha_l(int, locale_t);
           int   isascii(int);
           int   isblank(int);
           int   isblank_l(int, locale_t);
           int   iscntrl(int);
           int   iscntrl_l(int, locale_t);
           int   isdigit(int);
           int   isdigit_l(int, locale_t);
           int   isgraph(int);
           int   isgraph_l(int, locale_t);
           int   islower(int);
           int   islower_l(int, locale_t);
           int   isprint(int);
           int   isprint_l(int, locale_t);
           int   ispunct(int);
           int   ispunct_l(int, locale_t);
           int   isspace(int);
           int   isspace_l(int, locale_t);
           int   isupper(int);
           int   isupper_l(int, locale_t);
           int   isxdigit(int);
           int   isxdigit_l(int, locale_t);
           int   toascii(int);
           int   tolower(int);
           int   tolower_l(int, locale_t);
           int   toupper(int);
           int   toupper_l(int, locale_t);
       The <ctype.h> header shall define the following as macros:
           int   _toupper(int);
           int   _tolower(int);
       The following sections are informative.
APPLICATION USAGE
       None.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       <locale.h>
       The System Interfaces volume of POSIX.1-2008, Section 2.2, The Compila-
       tion Environment, isalnum(),  isalpha(),  isascii(),  isblank(),  iscn-
       trl(),  isdigit(),  isgraph(),  islower(),  isprint(),  ispunct(), iss-
       pace(), isupper(), isxdigit(), mblen(),  mbstowcs(),  mbtowc(),  setlo-
       cale(),   toascii(),   tolower(),  _tolower(),  toupper(),  _toupper(),
       wcstombs(), wctomb()
COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and
       The  Open Group Standard, the original IEEE and The Open Group Standard
       is the referee document. The original Standard can be  obtained  online
       at http://www.unix.org/online.html .
       Any  typographical  or  formatting  errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files  to  man page format. To report such errors, see https://www.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                          ctype.h(0P)