xlocale — Extended
locale support.
Standard C Library (libc, -lc)
Include ⟨xlocale.h⟩ for extended locale support. It
can be used alone or with the POSIX locale API in
⟨locale.h⟩.
The extended locale, or "xlocale" API consists of five
basic routines, which are documented separately:
duplocale(3),
freelocale(3),
newlocale(3),
querylocale(3), and
uselocale(3). For each of these
routines, if a NULL locale_t is given, the current
locale is used.
In addition, ⟨xlocale.h⟩ defines a few macros:
- LC_GLOBAL_LOCALE - A special locale_t value that
corresponds to the global, process-wide locale.
- LC_C_LOCALE - A special locale_t value that
corresponds to the C, system locale.
- MB_CUR_MAX - This macro is traditionally defined as an integer containing
the value of the longest multi-byte string that a single-wide character in
the global locale can translate into. With extended locales, this macro is
replaced with a function that returns the value of the longest multi-byte
string that a single-wide character in the current locale (per-thread or
global) can translate into.
- MB_CUR_MAX_L(loc) - This macro is equivalent to MB_CUR_MAX, except that it
may be passed a specific locale directly.
The POSIX setlocale(3)
function only affects the global locale, so using it when a per-thread
locale is in effect will not change locale behavior for that thread.
However, it will change behavior for threads with no per-thread locale in
effect.
The routines defined in ⟨rune.h⟩ are deprecated, and
may not be fully consistent with the xlocale API. Of particular note is
setinvalidrune(), which would normally modify the
value in the global locale. Since this value resides in a sub-structure of
locale_t and sub-structures may be shared by multiple
locales, setinvalidrune() has been modified to make
a copy of the sub-structure. This prevents it from affecting other
locales.
The xlocale API also includes "convenience functions":
functions that can be executed using a given locale, rather than the current
locale. These functions all take one extra locale_t
argument at the end of the traditional argument list, except in the case of
variable-argument functions, in which case the extra argument comes before
the format string. If a NULL locale_t is passed, the C
locale will be used.
For completeness, the convenience functions are listed here
(organized by the header file that contains the original function).
- ⟨_wctype.h⟩
- iswalnum_l(3),
iswalpha_l(3),
iswcntrl_l(3),
iswctype_l(3),
iswdigit_l(3),
iswgraph_l(3),
iswlower_l(3),
iswprint_l(3),
iswpunct_l(3),
iswspace_l(3),
iswupper_l(3),
iswxdigit_l(3),
towlower_l(3),
towupper_l(3),
wctype_l(3)
- ⟨ctype.h⟩
- digittoint_l(3),
isalnum_l(3),
isalpha_l(3),
isblank_l(3),
iscntrl_l(3),
isdigit_l(3),
isgraph_l(3),
ishexnumber_l(3),
isideogram_l(3),
islower_l(3),
isnumber_l(3),
isphonogram_l(3),
isprint_l(3),
ispunct_l(3),
isrune_l(3),
isspace_l(3),
isspecial_l(3),
isupper_l(3),
isxdigit_l(3),
tolower_l(3),
toupper_l(3)
- ⟨inttypes.h⟩
- strtoimax_l(3),
strtoumax_l(3),
wcstoimax_l(3),
wcstoumax_l(3)
- ⟨langinfo.h⟩
- nl_langinfo_l(3)
- ⟨monetary.h⟩
- strfmon_l(3)
- ⟨stdio.h⟩
- asprintf_l(3),
fprintf_l(3),
fscanf_l(3),
printf_l(3),
scanf_l(3),
snprintf_l(3),
sprintf_l(3),
sscanf_l(3),
vasprintf_l(3),
vfprintf_l(3),
vfscanf_l(3),
vprintf_l(3),
vscanf_l(3),
vsnprintf_l(3),
vsprintf_l(3),
vsscanf_l(3)
- ⟨stdlib.h⟩
- atof_l(3),
atoi_l(3),
atol_l(3),
atoll_l(3),
mblen_l(3),
mbstowcs_l(3),
mbtowc_l(3),
strtod_l(3),
strtof_l(3),
strtol_l(3),
strtold_l(3),
strtoll_l(3),
strtoq_l(3),
strtoul_l(3),
strtoull_l(3),
strtouq_l(3),
wcstombs_l(3),
wctomb_l(3)
- ⟨string.h⟩
- strcoll_l(3),
strxfrm_l(3),
strcasecmp_l(3),
strcasestr_l(3),
strncasecmp_l(3)
- ⟨time.h⟩
- strftime_l(3),
strptime_l(3)
- ⟨wchar.h⟩
- btowc_l(3),
fgetwc_l(3),
*fgetws_l(3),
fputwc_l(3),
fputws_l(3),
fwprintf_l(3),
fwscanf_l(3),
getwc_l(3),
getwchar_l(3),
mbrlen_l(3),
mbrtowc_l(3),
mbsinit_l(3),
mbsnrtowcs_l(3),
mbsrtowcs_l(3),
putwc_l(3),
putwchar_l(3),
swprintf_l(3),
swscanf_l(3),
ungetwc_l(3),
vfwprintf_l(3),
vfwscanf_l(3),
vswprintf_l(3),
vswscanf_l(3),
vwprintf_l(3),
vwscanf_l(3),
wcrtomb_l(3),
wcscoll_l(3),
wcsftime_l(3),
wcsnrtombs_l(3),
wcsrtombs_l(3),
wcstod_l(3),
wcstof_l(3),
wcstol_l(3),
wcstold_l(3),
wcstoll_l(3),
wcstoul_l(3),
wcstoull_l(3),
wcswidth_l(3),
wcsxfrm_l(3),
wctob_l(3),
wcwidth_l(3),
wprintf_l(3),
wscanf_l(3)
- ⟨wctype.h⟩
- iswblank_l(3),
iswhexnumber_l(3),
iswideogram_l(3),
iswnumber_l(3),
iswphonogram_l(3),
iswrune_l(3),
iswspecial_l(3),
nextwctype_l(3),
towctrans_l(3),
wctrans_l(3)
- ⟨xlocale.h⟩
- localeconv_l(3)