/* locale.c
*
* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
* 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* A Elbereth Gilthoniel,
* silivren penna míriel
* o menel aglar elenath!
* Na-chaered palan-díriel
* o galadhremmin ennorath,
* Fanuilos, le linnathon
* nef aear, si nef aearon!
*
* [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"]
*/
/* utility functions for handling locale-specific stuff like what
* character represents the decimal point.
*
* All C programs have an underlying locale. Perl generally doesn't pay any
* attention to it except within the scope of a 'use locale'. For most
* categories, it accomplishes this by just using different operations if it is
* in such scope than if not. However, various libc functions called by Perl
* are affected by the LC_NUMERIC category, so there are macros in perl.h that
* are used to toggle between the current locale and the C locale depending on
* the desired behavior of those functions at the moment.
*/
#include "EXTERN.h"
#define PERL_IN_LOCALE_C
#include "perl.h"
#ifdef I_LANGINFO
# include <langinfo.h>
#endif
#include "reentr.h"
#ifdef USE_LOCALE
/*
* Standardize the locale name from a string returned by 'setlocale', possibly
* modifying that string.
*
* The typical return value of setlocale() is either
* (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
* (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
* (the space-separated values represent the various sublocales,
* in some unspecified order). This is not handled by this function.
*
* In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
* which is harmful for further use of the string in setlocale(). This
* function removes the trailing new line and everything up through the '='
*
*/
STATIC char *
S_stdize_locale(pTHX_ char *locs)
{
const char * const s = strchr(locs, '=');
bool okay = TRUE;
PERL_ARGS_ASSERT_STDIZE_LOCALE;
if (s) {
const char * const t = strchr(s, '.');
okay = FALSE;
if (t) {
const char * const u = strchr(t, '\n');
if (u && (u[1] == 0)) {
const STRLEN len = u - s;
Move(s + 1, locs, len, char);
locs[len] = 0;
okay = TRUE;
}
}
}
if (!okay)
Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
return locs;
}
#endif
void
Perl_set_numeric_radix(pTHX)
{
#ifdef USE_LOCALE_NUMERIC
dVAR;
# ifdef HAS_LOCALECONV
const struct lconv* const lc = localeconv();
if (lc && lc->decimal_point) {
if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
SvREFCNT_dec(PL_numeric_radix_sv);
PL_numeric_radix_sv = NULL;
}
else {
if (PL_numeric_radix_sv)
sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
else
PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
if (! is_ascii_string((U8 *) lc->decimal_point, 0)
&& is_utf8_string((U8 *) lc->decimal_point, 0)
&& is_cur_LC_category_utf8(LC_NUMERIC))
{
SvUTF8_on(PL_numeric_radix_sv);
}
}
}
else
PL_numeric_radix_sv = NULL;
# endif /* HAS_LOCALECONV */
#endif /* USE_LOCALE_NUMERIC */
}
void
Perl_new_numeric(pTHX_ const char *newnum)
{
#ifdef USE_LOCALE_NUMERIC
/* Called after all libc setlocale() calls affecting LC_NUMERIC, to tell
* core Perl this and that 'newnum' is the name of the new locale.
* It installs this locale as the current underlying default.
*
* The default locale and the C locale can be toggled between by use of the
* set_numeric_local() and set_numeric_standard() functions, which should
* probably not be called directly, but only via macros like
* SET_NUMERIC_STANDARD() in perl.h.
*
* The toggling is necessary mainly so that a non-dot radix decimal point
* character can be output, while allowing internal calculations to use a
* dot.
*
* This sets several interpreter-level variables:
* PL_numeric_name The default locale's name: a copy of 'newnum'
* PL_numeric_local A boolean indicating if the toggled state is such
* that the current locale is the default locale
* PL_numeric_standard A boolean indicating if the toggled state is such
* that the current locale is the C locale
* Note that both of the last two variables can be true at the same time,
* if the underlying locale is C. (Toggling is a no-op under these
* circumstances.)
*
* Any code changing the locale (outside this file) should use
* POSIX::setlocale, which calls this function. Therefore this function
* should be called directly only from this file and from
* POSIX::setlocale() */
char *save_newnum;
dVAR;
if (! newnum) {
Safefree(PL_numeric_name);
PL_numeric_name = NULL;
PL_numeric_standard = TRUE;
PL_numeric_local = TRUE;
return;
}
save_newnum = stdize_locale(savepv(newnum));
if (! PL_numeric_name || strNE(PL_numeric_name, save_newnum)) {
Safefree(PL_numeric_name);
PL_numeric_name = save_newnum;
}
PL_numeric_standard = ((*save_newnum == 'C' && save_newnum[1] == '\0')
|| strEQ(save_newnum, "POSIX"));
PL_numeric_local = TRUE;
set_numeric_radix();
#endif /* USE_LOCALE_NUMERIC */
}
void
Perl_set_numeric_standard(pTHX)
{
#ifdef USE_LOCALE_NUMERIC
dVAR;
/* Toggle the LC_NUMERIC locale to C, if not already there. Probably
* should use the macros like SET_NUMERIC_STANDARD() in perl.h instead of
* calling this directly. */
if (! PL_numeric_standard) {
setlocale(LC_NUMERIC, "C");
PL_numeric_standard = TRUE;
PL_numeric_local = FALSE;
set_numeric_radix();
}
#endif /* USE_LOCALE_NUMERIC */
}
void
Perl_set_numeric_local(pTHX)
{
#ifdef USE_LOCALE_NUMERIC
dVAR;
/* Toggle the LC_NUMERIC locale to the current underlying default, if not
* already there. Probably should use the macros like SET_NUMERIC_LOCAL()
* in perl.h instead of calling this directly. */
if (! PL_numeric_local) {
setlocale(LC_NUMERIC, PL_numeric_name);
PL_numeric_standard = FALSE;
PL_numeric_local = TRUE;
set_numeric_radix();
}
#endif /* USE_LOCALE_NUMERIC */
}
/*
* Set up for a new ctype locale.
*/
void
Perl_new_ctype(pTHX_ const char *newctype)
{
#ifdef USE_LOCALE_CTYPE
/* Called after all libc setlocale() calls affecting LC_CTYPE, to tell
* core Perl this and that 'newctype' is the name of the new locale.
*
* This function sets up the folding arrays for all 256 bytes, assuming
* that tofold() is tolc() since fold case is not a concept in POSIX,
*
* Any code changing the locale (outside this file) should use
* POSIX::setlocale, which calls this function. Therefore this function
* should be called directly only from this file and from
* POSIX::setlocale() */
dVAR;
UV i;
PERL_ARGS_ASSERT_NEW_CTYPE;
for (i = 0; i < 256; i++) {
if (isUPPER_LC((U8) i))
PL_fold_locale[i] = toLOWER_LC((U8) i);
else if (isLOWER_LC((U8) i))
PL_fold_locale[i] = toUPPER_LC((U8) i);
else
PL_fold_locale[i] = i;
}
#endif /* USE_LOCALE_CTYPE */
PERL_ARGS_ASSERT_NEW_CTYPE;
PERL_UNUSED_ARG(newctype);
PERL_UNUSED_CONTEXT;
}
void
Perl_new_collate(pTHX_ const char *newcoll)
{
#ifdef USE_LOCALE_COLLATE
/* Called after all libc setlocale() calls affecting LC_COLLATE, to tell
* core Perl this and that 'newcoll' is the name of the new locale.
*
* Any code changing the locale (outside this file) should use
* POSIX::setlocale, which calls this function. Therefore this function
* should be called directly only from this file and from
* POSIX::setlocale() */
dVAR;
if (! newcoll) {
if (PL_collation_name) {
++PL_collation_ix;
Safefree(PL_collation_name);
PL_collation_name = NULL;
}
PL_collation_standard = TRUE;
PL_collxfrm_base = 0;
PL_collxfrm_mult = 2;
return;
}
if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
++PL_collation_ix;
Safefree(PL_collation_name);
PL_collation_name = stdize_locale(savepv(newcoll));
PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0')
|| strEQ(newcoll, "POSIX"));
{
/* 2: at most so many chars ('a', 'b'). */
/* 50: surely no system expands a char more. */
#define XFRMBUFSIZE (2 * 50)
char xbuf[XFRMBUFSIZE];
const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
const SSize_t mult = fb - fa;
if (mult < 1 && !(fa == 0 && fb == 0))
Perl_croak(aTHX_ "panic: strxfrm() gets absurd - a => %"UVuf", ab => %"UVuf,
(UV) fa, (UV) fb);
PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
PL_collxfrm_mult = mult;
}
}
#endif /* USE_LOCALE_COLLATE */
}
/*
* Initialize locale awareness.
*/
int
Perl_init_i18nl10n(pTHX_ int printwarn)
{
int ok = 1;
/* returns
* 1 = set ok or not applicable,
* 0 = fallback to C locale,
* -1 = fallback to C locale failed
*/
#if defined(USE_LOCALE)
dVAR;
#ifdef USE_LOCALE_CTYPE
char *curctype = NULL;
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
char *curcoll = NULL;
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
char *curnum = NULL;
#endif /* USE_LOCALE_NUMERIC */
#ifdef __GLIBC__
char * const language = PerlEnv_getenv("LANGUAGE");
#endif
/* NULL uses the existing already set up locale */
const char * const setlocale_init = (PerlEnv_getenv("PERL_SKIP_LOCALE_INIT"))
? NULL
: "";
char * const lc_all = PerlEnv_getenv("LC_ALL");
char * const lang = PerlEnv_getenv("LANG");
bool setlocale_failure = FALSE;
#ifdef LOCALE_ENVIRON_REQUIRED
/*
* Ultrix setlocale(..., "") fails if there are no environment
* variables from which to get a locale name.
*/
bool done = FALSE;
# ifdef LC_ALL
if (lang) {
if (setlocale(LC_ALL, setlocale_init))
done = TRUE;
else
setlocale_failure = TRUE;
}
if (!setlocale_failure) {
# ifdef USE_LOCALE_CTYPE
Safefree(curctype);
if (! (curctype =
setlocale(LC_CTYPE,
(!done && (lang || PerlEnv_getenv("LC_CTYPE")))
? setlocale_init : NULL)))
setlocale_failure = TRUE;
else
curctype = savepv(curctype);
# endif /* USE_LOCALE_CTYPE */
# ifdef USE_LOCALE_COLLATE
Safefree(curcoll);
if (! (curcoll =
setlocale(LC_COLLATE,
(!done && (lang || PerlEnv_getenv("LC_COLLATE")))
? setlocale_init : NULL)))
setlocale_failure = TRUE;
else
curcoll = savepv(curcoll);
# endif /* USE_LOCALE_COLLATE */
# ifdef USE_LOCALE_NUMERIC
Safefree(curnum);
if (! (curnum =
setlocale(LC_NUMERIC,
(!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
? setlocale_init : NULL)))
setlocale_failure = TRUE;
else
curnum = savepv(curnum);
# endif /* USE_LOCALE_NUMERIC */
}
# endif /* LC_ALL */
#endif /* !LOCALE_ENVIRON_REQUIRED */
#ifdef LC_ALL
if (! setlocale(LC_ALL, setlocale_init))
setlocale_failure = TRUE;
#endif /* LC_ALL */
if (!setlocale_failure) {
#ifdef USE_LOCALE_CTYPE
Safefree(curctype);
if (! (curctype = setlocale(LC_CTYPE, setlocale_init)))
setlocale_failure = TRUE;
else
curctype = savepv(curctype);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
Safefree(curcoll);
if (! (curcoll = setlocale(LC_COLLATE, setlocale_init)))
setlocale_failure = TRUE;
else
curcoll = savepv(curcoll);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
Safefree(curnum);
if (! (curnum = setlocale(LC_NUMERIC, setlocale_init)))
setlocale_failure = TRUE;
else
curnum = savepv(curnum);
#endif /* USE_LOCALE_NUMERIC */
}
if (setlocale_failure) {
char *p;
const bool locwarn = (printwarn > 1 ||
(printwarn &&
(!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p))));
if (locwarn) {
#ifdef LC_ALL
PerlIO_printf(Perl_error_log,
"perl: warning: Setting locale failed.\n");
#else /* !LC_ALL */
PerlIO_printf(Perl_error_log,
"perl: warning: Setting locale failed for the categories:\n\t");
#ifdef USE_LOCALE_CTYPE
if (! curctype)
PerlIO_printf(Perl_error_log, "LC_CTYPE ");
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
if (! curcoll)
PerlIO_printf(Perl_error_log, "LC_COLLATE ");
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
if (! curnum)
PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
#endif /* USE_LOCALE_NUMERIC */
PerlIO_printf(Perl_error_log, "\n");
#endif /* LC_ALL */
PerlIO_printf(Perl_error_log,
"perl: warning: Please check that your locale settings:\n");
#ifdef __GLIBC__
PerlIO_printf(Perl_error_log,
"\tLANGUAGE = %c%s%c,\n",
language ? '"' : '(',
language ? language : "unset",
language ? '"' : ')');
#endif
PerlIO_printf(Perl_error_log,
"\tLC_ALL = %c%s%c,\n",
lc_all ? '"' : '(',
lc_all ? lc_all : "unset",
lc_all ? '"' : ')');
#if defined(USE_ENVIRON_ARRAY)
{
char **e;
for (e = environ; *e; e++) {
if (strnEQ(*e, "LC_", 3)
&& strnNE(*e, "LC_ALL=", 7)
&& (p = strchr(*e, '=')))
PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
(int)(p - *e), *e, p + 1);
}
}
#else
PerlIO_printf(Perl_error_log,
"\t(possibly more locale environment variables)\n");
#endif
PerlIO_printf(Perl_error_log,
"\tLANG = %c%s%c\n",
lang ? '"' : '(',
lang ? lang : "unset",
lang ? '"' : ')');
PerlIO_printf(Perl_error_log,
" are supported and installed on your system.\n");
}
#ifdef LC_ALL
if (setlocale(LC_ALL, "C")) {
if (locwarn)
PerlIO_printf(Perl_error_log,
"perl: warning: Falling back to the standard locale (\"C\").\n");
ok = 0;
}
else {
if (locwarn)
PerlIO_printf(Perl_error_log,
"perl: warning: Failed to fall back to the standard locale (\"C\").\n");
ok = -1;
}
#else /* ! LC_ALL */
if (0
#ifdef USE_LOCALE_CTYPE
|| !(curctype || setlocale(LC_CTYPE, "C"))
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
|| !(curcoll || setlocale(LC_COLLATE, "C"))
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
|| !(curnum || setlocale(LC_NUMERIC, "C"))
#endif /* USE_LOCALE_NUMERIC */
)
{
if (locwarn)
PerlIO_printf(Perl_error_log,
"perl: warning: Cannot fall back to the standard locale (\"C\").\n");
ok = -1;
}
#endif /* ! LC_ALL */
#ifdef USE_LOCALE_CTYPE
Safefree(curctype);
curctype = savepv(setlocale(LC_CTYPE, NULL));
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
Safefree(curcoll);
curcoll = savepv(setlocale(LC_COLLATE, NULL));
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
Safefree(curnum);
curnum = savepv(setlocale(LC_NUMERIC, NULL));
#endif /* USE_LOCALE_NUMERIC */
}
else {
#ifdef USE_LOCALE_CTYPE
new_ctype(curctype);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
new_collate(curcoll);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
new_numeric(curnum);
#endif /* USE_LOCALE_NUMERIC */
}
#if defined(USE_PERLIO) && defined(USE_LOCALE_CTYPE)
{
/* Set PL_utf8locale to TRUE if using PerlIO _and_
the current LC_CTYPE locale is UTF-8.
If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE})
are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer
on STDIN, STDOUT, STDERR, _and_ the default open discipline.
*/
PL_utf8locale = is_cur_LC_category_utf8(LC_CTYPE);
}
/* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
This is an alternative to using the -C command line switch
(the -C if present will override this). */
{
const char *p = PerlEnv_getenv("PERL_UNICODE");
PL_unicode = p ? parse_unicode_opts(&p) : 0;
if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
PL_utf8cache = -1;
}
#endif
#ifdef USE_LOCALE_CTYPE
Safefree(curctype);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
Safefree(curcoll);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
Safefree(curnum);
#endif /* USE_LOCALE_NUMERIC */
#endif /* USE_LOCALE */
return ok;
}
#ifdef USE_LOCALE_COLLATE
/*
* mem_collxfrm() is a bit like strxfrm() but with two important
* differences. First, it handles embedded NULs. Second, it allocates
* a bit more memory than needed for the transformed data itself.
* The real transformed data begins at offset sizeof(collationix).
* Please see sv_collxfrm() to see how this is used.
*/
char *
Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
{
dVAR;
char *xbuf;
STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
PERL_ARGS_ASSERT_MEM_COLLXFRM;
/* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
/* the +1 is for the terminating NUL. */
xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
Newx(xbuf, xAlloc, char);
if (! xbuf)
goto bad;
*(U32*)xbuf = PL_collation_ix;
xout = sizeof(PL_collation_ix);
for (xin = 0; xin < len; ) {
Size_t xused;
for (;;) {
xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
if (xused >= PERL_INT_MAX)
goto bad;
if ((STRLEN)xused < xAlloc - xout)
break;
xAlloc = (2 * xAlloc) + 1;
Renew(xbuf, xAlloc, char);
if (! xbuf)
goto bad;
}
xin += strlen(s + xin) + 1;
xout += xused;
/* Embedded NULs are understood but silently skipped
* because they make no sense in locale collation. */
}
xbuf[xout] = '\0';
*xlen = xout - sizeof(PL_collation_ix);
return xbuf;
bad:
Safefree(xbuf);
*xlen = 0;
return NULL;
}
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE
STATIC bool
S_is_cur_LC_category_utf8(pTHX_ int category)
{
/* Returns TRUE if the current locale for 'category' is UTF-8; FALSE
* otherwise. 'category' may not be LC_ALL. If the platform doesn't have
* nl_langinfo(), this employs a heuristic, which hence could give the
* wrong result. It errs on the side of not being a UTF-8 locale. */
char *save_input_locale = NULL;
STRLEN final_pos;
#ifdef LC_ALL
assert(category != LC_ALL);
#endif
/* First dispose of the trivial cases */
save_input_locale = setlocale(category, NULL);
if (! save_input_locale) {
return FALSE; /* XXX maybe should croak */
}
save_input_locale = stdize_locale(savepv(save_input_locale));
if ((*save_input_locale == 'C' && save_input_locale[1] == '\0')
|| strEQ(save_input_locale, "POSIX"))
{
Safefree(save_input_locale);
return FALSE;
}
#if defined(HAS_NL_LANGINFO) && defined(CODESET) && defined(USE_LOCALE_CTYPE)
{ /* Next try nl_langinfo if available */
char *save_ctype_locale = NULL;
char *codeset = NULL;
if (category != LC_CTYPE) { /* nl_langinfo works only on LC_CTYPE */
/* Get the current LC_CTYPE locale */
save_ctype_locale = stdize_locale(savepv(setlocale(LC_CTYPE, NULL)));
if (! save_ctype_locale) {
goto cant_use_nllanginfo;
}
/* If LC_CTYPE and the desired category use the same locale, this
* means that finding the value for LC_CTYPE is the same as finding
* the value for the desired category. Otherwise, switch LC_CTYPE
* to the desired category's locale */
if (strEQ(save_ctype_locale, save_input_locale)) {
Safefree(save_ctype_locale);
save_ctype_locale = NULL;
}
else if (! setlocale(LC_CTYPE, save_input_locale)) {
Safefree(save_ctype_locale);
goto cant_use_nllanginfo;
}
}
/* Here the current LC_CTYPE is set to the locale of the category whose
* information is desired. This means that nl_langinfo() should give
* the correct results */
codeset = savepv(nl_langinfo(CODESET));
if (codeset) {
bool is_utf8;
/* If we switched LC_CTYPE, switch back */
if (save_ctype_locale) {
setlocale(LC_CTYPE, save_ctype_locale);
Safefree(save_ctype_locale);
}
is_utf8 = foldEQ(codeset, STR_WITH_LEN("UTF-8"))
|| foldEQ(codeset, STR_WITH_LEN("UTF8"));
Safefree(codeset);
Safefree(save_input_locale);
return is_utf8;
}
}
cant_use_nllanginfo:
#endif /* HAS_NL_LANGINFO etc */
/* nl_langinfo not available or failed somehow. Look at the locale name to
* see if it matches qr/UTF -? 8 /ix */
final_pos = strlen(save_input_locale) - 1;
if (final_pos >= 3) {
char *name = save_input_locale;
/* Find next 'U' or 'u' and look from there */
while ((name += strcspn(name, "Uu") + 1)
<= save_input_locale + final_pos - 2)
{
if (toFOLD(*(name)) != 't'
|| toFOLD(*(name + 1)) != 'f')
{
continue;
}
name += 2;
if (*(name) == '-') {
if ((name > save_input_locale + final_pos - 1)) {
break;
}
name++;
}
if (*(name) == '8') {
Safefree(save_input_locale);
return TRUE;
}
}
}
#ifdef WIN32
/* http://msdn.microsoft.com/en-us/library/windows/desktop/dd317756.aspx */
if (final_pos >= 4
&& *(save_input_locale + final_pos - 0) == '1'
&& *(save_input_locale + final_pos - 1) == '0'
&& *(save_input_locale + final_pos - 2) == '0'
&& *(save_input_locale + final_pos - 3) == '5'
&& *(save_input_locale + final_pos - 4) == '6')
{
Safefree(save_input_locale);
return TRUE;
}
#endif
/* Other common encodings are the ISO 8859 series, which aren't UTF-8 */
if (instr(save_input_locale, "8859")) {
Safefree(save_input_locale);
return FALSE;
}
#ifdef HAS_LOCALECONV
# ifdef USE_LOCALE_MONETARY
/* Here, there is nothing in the locale name to indicate whether the locale
* is UTF-8 or not. This "name", the return of setlocale(), is actually
* defined to be opaque, so we can't really rely on the absence of various
* substrings in the name to indicate its UTF-8ness. Look at the locale's
* currency symbol. Often that will be in the native script, and if the
* symbol isn't in UTF-8, we know that the locale isn't. If it is
* non-ASCII UTF-8, we infer that the locale is too.
* To do this, like above for LC_CTYPE, we first set LC_MONETARY to the
* locale of the desired category, if it isn't that locale already */
{
char *save_monetary_locale = NULL;
bool illegal_utf8 = FALSE;
bool only_ascii = FALSE;
const struct lconv* const lc = localeconv();
if (category != LC_MONETARY) {
save_monetary_locale = stdize_locale(savepv(setlocale(LC_MONETARY,
NULL)));
if (! save_monetary_locale) {
goto cant_use_monetary;
}
if (strNE(save_monetary_locale, save_input_locale)) {
if (! setlocale(LC_MONETARY, save_input_locale)) {
Safefree(save_monetary_locale);
goto cant_use_monetary;
}
}
}
/* Here the current LC_MONETARY is set to the locale of the category
* whose information is desired. */
if (lc && lc->currency_symbol) {
if (! is_utf8_string((U8 *) lc->currency_symbol, 0)) {
illegal_utf8 = TRUE;
}
else if (is_ascii_string((U8 *) lc->currency_symbol, 0)) {
only_ascii = TRUE;
}
}
/* If we changed it, restore LC_MONETARY to its original locale */
if (save_monetary_locale) {
setlocale(LC_MONETARY, save_monetary_locale);
Safefree(save_monetary_locale);
}
Safefree(save_input_locale);
/* It isn't a UTF-8 locale if the symbol is not legal UTF-8; otherwise
* assume the locale is UTF-8 if and only if the symbol is non-ascii
* UTF-8. (We can't really tell if the locale is UTF-8 or not if the
* symbol is just a '$', so we err on the side of it not being UTF-8)
* */
return (illegal_utf8)
? FALSE
: ! only_ascii;
}
cant_use_monetary:
# endif /* USE_LOCALE_MONETARY */
#endif /* HAS_LOCALECONV */
#if 0 && defined(HAS_STRERROR) && defined(USE_LOCALE_MESSAGES)
/* This code is ifdefd out because it was found to not be necessary in testing
* on our dromedary test machine, which has over 700 locales. There, looking
* at just the currency symbol gave essentially the same results as doing this
* extra work. Executing this also caused segfaults in miniperl. I left it in
* so as to avoid rewriting it if real-world experience indicates that
* dromedary is an outlier. Essentially, instead of returning abpve if we
* haven't found illegal utf8, we continue on and examine all the strerror()
* messages on the platform for utf8ness. If all are ASCII, we still don't
* know the answer; but otherwise we have a pretty good indication of the
* utf8ness. The reason this doesn't necessarily help much is that the
* messages may not have been translated into the locale. The currency symbol
* is much more likely to have been translated. The code below would need to
* be altered somewhat to just be a continuation of testing the currency
* symbol. */
int e;
unsigned int failures = 0, non_ascii = 0;
char *save_messages_locale = NULL;
/* Like above for LC_CTYPE, we set LC_MESSAGES to the locale of the
* desired category, if it isn't that locale already */
if (category != LC_MESSAGES) {
save_messages_locale = stdize_locale(savepv(setlocale(LC_MESSAGES,
NULL)));
if (! save_messages_locale) {
goto cant_use_messages;
}
if (strEQ(save_messages_locale, save_input_locale)) {
Safefree(save_input_locale);
}
else if (! setlocale(LC_MESSAGES, save_input_locale)) {
Safefree(save_messages_locale);
goto cant_use_messages;
}
}
/* Here the current LC_MESSAGES is set to the locale of the category
* whose information is desired. Look through all the messages */
for (e = 0;
#ifdef HAS_SYS_ERRLIST
e <= sys_nerr
#endif
; e++)
{
const U8* const errmsg = (U8 *) Strerror(e) ;
if (!errmsg)
break;
if (! is_utf8_string(errmsg, 0)) {
failures++;
break;
}
else if (! is_ascii_string(errmsg, 0)) {
non_ascii++;
}
}
/* And, if we changed it, restore LC_MESSAGES to its original locale */
if (save_messages_locale) {
setlocale(LC_MESSAGES, save_messages_locale);
Safefree(save_messages_locale);
}
/* Any non-UTF-8 message means not a UTF-8 locale; if all are valid,
* any non-ascii means it is one; otherwise we assume it isn't */
return (failures) ? FALSE : non_ascii;
}
cant_use_messages:
#endif
Safefree(save_input_locale);
return FALSE;
}
#endif
/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*
* ex: set ts=8 sts=4 sw=4 et:
*/