isupper(3p) — Справочная страница Linux

ISUPPER(3P)             POSIX Programmer's Manual            ISUPPER(3P)

ПРОЛОГ

       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.

ИМЯ

       isupper, isupper_l — test for an uppercase letter

СИНТАКСИС

       #include <ctype.h>

       int isupper(int c);
       int isupper_l(int c, locale_t locale);

ОПИСАНИЕ

       For isupper(): The functionality described on this reference page
       is aligned with the ISO C standard. Any conflict between the
       requirements described here and the ISO C standard is
       unintentional. This volume of POSIX.1‐2017 defers to the ISO C
       standard.

       The isupper() and isupper_l() functions shall test whether c is a
       character of class upper in the current locale, or in the locale
       represented by locale, respectively; see the Base Definitions
       volume of POSIX.1‐2017, Chapter 7, Locale.

       The c argument is an int, the value of which the application
       shall ensure is a character representable as an unsigned char or
       equal to the value of the macro EOF. If the argument has any
       other value, the behavior is undefined.

       The behavior is undefined if the locale argument to isupper_l()
       is the special locale object LC_GLOBAL_LOCALE or is not a valid
       locale object handle.

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       The isupper() and isupper_l() functions shall return non-zero if
       c is an uppercase letter; otherwise, they shall return 0.

ОШИБКИ

       No errors are defined.

       The following sections are informative.

ПРИМЕРЫ

       None.

ПРИМЕНЕНИЕ В ПРОГРАММАХ

       To ensure applications portability, especially across natural
       languages, only these functions and the functions in the
       reference pages listed in the SEE ALSO section should be used for
       character classification.

ОБЪЯСНЕНИЕ

       None.

НАПРАВЛЕНИЯ РАЗВИТИЯ

       None.

СМОТРИТЕ ТАКЖЕ

       isalnum(3p), isalpha(3p), isblank(3p), iscntrl(3p), isdigit(3p),
       isgraph(3p), islower(3p), isprint(3p), ispunct(3p), isspace(3p),
       isxdigit(3p), setlocale(3p), uselocale(3p)

       The Base Definitions volume of POSIX.1‐2017, Chapter 7, Locale,
       ctype.h(0p), locale.h(0p)

АВТОРСКИЕ ПРАВА

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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.opengroup.org/unix/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               2017                       ISUPPER(3P)

Страницы, ссылающиеся на эту: ctype.h(0p), isalnum(3p), isalpha(3p), isblank(3p), iscntrl(3p), isdigit(3p), isgraph(3p), islower(3p), isprint(3p), ispunct(3p), isspace(3p), isxdigit(3p), setlocale(3p), _tolower(3p)