개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

toupper_l(3)

TOUPPER(3)                 Linux Programmer's Manual                TOUPPER(3)

NAME
       toupper, tolower, toupper_l, tolower_l - convert uppercase or lowercase

SYNOPSIS
       #include <ctype.h>

       int toupper(int c);
       int tolower(int c);

       int toupper_l(int c, locale_t locale);
       int tolower_l(int c, locale_t locale);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       toupper_l(), tolower_l():
           Since glibc 2.10:
                  _XOPEN_SOURCE >= 700
           Before glibc 2.10:
                  _GNU_SOURCE

DESCRIPTION
       These functions convert lowercase letters to uppercase, and vice versa.

       If c is a lowercase letter, toupper() returns its uppercase equivalent,
       if  an  uppercase  representation exists in the current locale.  Other‐
       wise, it returns c.  The toupper_l() function performs the  same  task,
       but uses the locale referred to by the locale handle locale.

       If  c  is  an uppercase letter, tolower() returns its lowercase equiva‐
       lent, if a lowercase representation exists in the current locale.  Oth‐
       erwise, it returns c.  The tolower_l() function performs the same task,
       but uses the locale referred to by the locale handle locale.

       If c is neither an unsigned char value nor EOF, the behavior  of  these
       functions is undefined.

       The  behavior  of toupper_l() and tolower_l() is undefined if locale is
       the special locale object LC_GLOBAL_LOCALE (see duplocale(3)) or is not
       a valid locale object handle.

RETURN VALUE
       The value returned is that of the converted letter, or c if the conver‐
       sion was not possible.

ATTRIBUTES
       For an explanation of the terms  used  in  this  section,  see  attrib‐
       utes(7).   allbox;  lbw24  lb  lb  l l l.  Interface Attribute Value T{
       toupper(), tolower(),
       toupper_l(), tolower_l() T}   Thread safety  MT-Safe

CONFORMING TO
       toupper(), tolower(): C89, C99, 4.3BSD, POSIX.1-2001, POSIX.1-2008.

       toupper_l(), tolower_l(): POSIX.1-2008.

NOTES
       The standards require that the argument c for these functions is either
       EOF or a value that is representable in the type unsigned char.  If the
       argument c is of type char, it must be cast to unsigned char, as in the
       following example:

           char c;
           ...
           res = toupper((unsigned char) c);

       This is necessary because char may be the equivalent  signed  char,  in
       which  case a byte where the top bit is set would be sign extended when
       converting to int, yielding a value that is outside the  range  of  un‐
       signed char.

       The details of what constitutes an uppercase or lowercase letter depend
       on the locale.  For example, the default "C" locale does not know about
       umlauts, so no conversion is done for them.

       In some non-English locales, there are lowercase letters with no corre‐
       sponding uppercase equivalent; the German sharp s is one example.

SEE ALSO
       isalpha(3),  newlocale(3), setlocale(3), towlower(3), towupper(3), use‐
       locale(3), locale(7)

COLOPHON
       This page is part of release 5.02 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.

GNU                               2017-09-15                        TOUPPER(3)