btowc(3) — Linux manual page


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

NAME         top

       btowc - convert single byte to wide character

SYNOPSIS         top

       #include <wchar.h>

       wint_t btowc(int c);

DESCRIPTION         top

       The btowc() function converts c, interpreted as a multibyte sequence
       of length 1, starting in the initial shift state, to a wide character
       and returns it.  If c is EOF or not a valid multibyte sequence of
       length 1, the btowc() function returns WEOF.

RETURN VALUE         top

       The btowc() function returns the wide character converted from the
       single byte c.  If c is EOF or not a valid multibyte sequence of
       length 1, it returns WEOF.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see

       │Interface Attribute     Value   │
       │btowc()   │ Thread safety │ MT-Safe │

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES         top

       The behavior of btowc() depends on the LC_CTYPE category of the
       current locale.

       This function should never be used.  It does not work for encodings
       which have state, and unnecessarily treats single bytes differently
       from multibyte sequences.  Use either mbtowc(3) or the thread-safe
       mbrtowc(3) instead.

SEE ALSO         top

       mbrtowc(3), mbtowc(3), wctob(3)

COLOPHON         top

       This page is part of release 5.07 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

GNU                              2015-08-08                         BTOWC(3)

Pages that refer to this page: fwprintf(3)swprintf(3)vfwprintf(3)vswprintf(3)vwprintf(3)wctob(3)wprintf(3)