ctype.h(0p) — Linux manual page


ctype.h(0P)               POSIX Programmer's Manual              ctype.h(0P)

PROLOG         top

       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         top

       ctype.h — character types

SYNOPSIS         top

       #include <ctype.h>

DESCRIPTION         top

       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
       standard 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.



RATIONALE         top




SEE ALSO         top


       The System Interfaces volume of POSIX.1‐2008, Section 2.2, The
       Compilation Environment, isalnum(3p), isalpha(3p), isascii(3p),
       isblank(3p), iscntrl(3p), isdigit(3p), isgraph(3p), islower(3p),
       isprint(3p), ispunct(3p), isspace(3p), isupper(3p), isxdigit(3p),
       mblen(3p), mbstowcs(3p), mbtowc(3p), setlocale(3p), toascii(3p),
       tolower(3p), _tolower(3p), toupper(3p), _toupper(3p), wcstombs(3p),

COPYRIGHT         top

       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 Electrical 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.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                         ctype.h(0P)

Pages that refer to this page: wchar.h(0p)wctype.h(0p)isalnum(3p)isalnum_l(3p)isalpha(3p)isalpha_l(3p)isascii(3p)isblank(3p)isblank_l(3p)iscntrl(3p)iscntrl_l(3p)isdigit(3p)isdigit_l(3p)isgraph(3p)isgraph_l(3p)islower(3p)islower_l(3p)isprint(3p)isprint_l(3p)ispunct(3p)ispunct_l(3p)isspace(3p)isspace_l(3p)isupper(3p)isupper_l(3p)isxdigit(3p)isxdigit_l(3p)toascii(3p)tolower(3p)_tolower(3p)tolower_l(3p)toupper(3p)_toupper(3p)toupper_l(3p)