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|
/* 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;
DEBUG_L(PerlIO_printf(Perl_debug_log, "Locale radix is %s\n",
(PL_numeric_radix_sv)
? lc->decimal_point
: "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();
}
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Underlying LC_NUMERIC locale now is C\n"));
#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();
}
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Underlying LC_NUMERIC locale now is %s\n",
PL_numeric_name));
#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;
PL_in_utf8_CTYPE_locale = is_cur_LC_category_utf8(LC_CTYPE);
/* A UTF-8 locale gets standard rules. But note that code still has to
* handle this specially because of the three problematic code points */
if (PL_in_utf8_CTYPE_locale) {
Copy(PL_fold_latin1, PL_fold_locale, 256, U8);
}
else {
for (i = 0; i < 256; i++) {
if (isUPPER_LC((U8) i))
PL_fold_locale[i] = (U8) toLOWER_LC((U8) i);
else if (isLOWER_LC((U8) i))
PL_fold_locale[i] = (U8) toUPPER_LC((U8) i);
else
PL_fold_locale[i] = (U8) 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 */
}
#ifdef WIN32
char *
Perl_my_setlocale(pTHX_ int category, const char* locale)
{
/* This, for Windows, emulates POSIX setlocale() behavior. There is no
* difference unless the input locale is "", which means on Windows to get
* the machine default, which is set via the computer's "Regional and
* Language Options" (or its current equivalent). In POSIX, it instead
* means to find the locale from the user's environment. This routine
* looks in the environment, and, if anything is found, uses that instead
* of going to the machine default. If there is no environment override,
* the machine default is used, as normal, by calling the real setlocale()
* with "". The POSIX behavior is to use the LC_ALL variable if set;
* otherwise to use the particular category's variable if set; otherwise to
* use the LANG variable. */
bool override_LC_ALL = 0;
char * result;
if (locale && strEQ(locale, "")) {
# ifdef LC_ALL
locale = PerlEnv_getenv("LC_ALL");
if (! locale) {
#endif
switch (category) {
# ifdef LC_ALL
case LC_ALL:
override_LC_ALL = TRUE;
break; /* We already know its variable isn't set */
# endif
# ifdef USE_LOCALE_TIME
case LC_TIME:
locale = PerlEnv_getenv("LC_TIME");
break;
# endif
# ifdef USE_LOCALE_CTYPE
case LC_CTYPE:
locale = PerlEnv_getenv("LC_CTYPE");
break;
# endif
# ifdef USE_LOCALE_COLLATE
case LC_COLLATE:
locale = PerlEnv_getenv("LC_COLLATE");
break;
# endif
# ifdef USE_LOCALE_MONETARY
case LC_MONETARY:
locale = PerlEnv_getenv("LC_MONETARY");
break;
# endif
# ifdef USE_LOCALE_NUMERIC
case LC_NUMERIC:
locale = PerlEnv_getenv("LC_NUMERIC");
break;
# endif
# ifdef USE_LOCALE_MESSAGES
case LC_MESSAGES:
locale = PerlEnv_getenv("LC_MESSAGES");
break;
# endif
default:
/* This is a category, like PAPER_SIZE that we don't
* know about; and so can't provide a wrapper. */
break;
}
if (! locale) {
locale = PerlEnv_getenv("LANG");
if (! locale) {
locale = "";
}
}
# ifdef LC_ALL
}
# endif
}
result = setlocale(category, locale);
if (! override_LC_ALL) {
return result;
}
/* Here the input locale was LC_ALL, and we have set it to what is in the
* LANG variable or the system default if there is no LANG. But these have
* lower priority than the other LC_foo variables, so override it for each
* one that is set. (If they are set to "", it means to use the same thing
* we just set LC_ALL to, so can skip) */
# ifdef USE_LOCALE_TIME
result = PerlEnv_getenv("LC_TIME");
if (result && strNE(result, "")) {
setlocale(LC_TIME, result);
}
# endif
# ifdef USE_LOCALE_CTYPE
result = PerlEnv_getenv("LC_CTYPE");
if (result && strNE(result, "")) {
setlocale(LC_CTYPE, result);
}
# endif
# ifdef USE_LOCALE_COLLATE
result = PerlEnv_getenv("LC_COLLATE");
if (result && strNE(result, "")) {
setlocale(LC_COLLATE, result);
}
# endif
# ifdef USE_LOCALE_MONETARY
result = PerlEnv_getenv("LC_MONETARY");
if (result && strNE(result, "")) {
setlocale(LC_MONETARY, result);
}
# endif
# ifdef USE_LOCALE_NUMERIC
result = PerlEnv_getenv("LC_NUMERIC");
if (result && strNE(result, "")) {
setlocale(LC_NUMERIC, result);
}
# endif
# ifdef USE_LOCALE_MESSAGES
result = PerlEnv_getenv("LC_MESSAGES");
if (result && strNE(result, "")) {
setlocale(LC_MESSAGES, result);
}
# endif
return setlocale(LC_ALL, NULL);
}
#endif
/*
* Initialize locale awareness.
*/
int
Perl_init_i18nl10n(pTHX_ int printwarn)
{
/* printwarn is
*
* 0 if not to output warning when setup locale is bad
* 1 if to output warning based on value of PERL_BADLANG
* >1 if to output regardless of PERL_BADLANG
*
* returns
* 1 = set ok or not applicable,
* 0 = fallback to a locale of lower priority
* -1 = fallback to all locales failed, not even to the C locale
*/
int ok = 1;
#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
: "";
const char* trial_locales[5]; /* 5 = 1 each for "", LC_ALL, LANG, "", C */
unsigned int trial_locales_count;
char * const lc_all = PerlEnv_getenv("LC_ALL");
char * const lang = PerlEnv_getenv("LANG");
bool setlocale_failure = FALSE;
unsigned int i;
char *p;
const bool locwarn = (printwarn > 1 ||
(printwarn &&
/* Debian specific change - see http://bugs.debian.org/508764 */
(!PerlEnv_getenv("DPKG_RUNNING_VERSION")) &&
(!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p))));
bool done = FALSE;
const char *system_default_locale = NULL;
#ifndef LOCALE_ENVIRON_REQUIRED
PERL_UNUSED_VAR(done);
#else
/*
* Ultrix setlocale(..., "") fails if there are no environment
* variables from which to get a locale name.
*/
# ifdef LC_ALL
if (lang) {
if (my_setlocale(LC_ALL, setlocale_init))
done = TRUE;
else
setlocale_failure = TRUE;
}
if (!setlocale_failure) {
# ifdef USE_LOCALE_CTYPE
Safefree(curctype);
if (! (curctype =
my_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 =
my_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 =
my_setlocale(LC_NUMERIC,
(!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
? setlocale_init : NULL)))
setlocale_failure = TRUE;
else
curnum = savepv(curnum);
# endif /* USE_LOCALE_NUMERIC */
# ifdef USE_LOCALE_MESSAGES
if (! my_setlocale(LC_MESSAGES,
(!done && (lang || PerlEnv_getenv("LC_MESSAGES")))
? setlocale_init : NULL))
{
setlocale_failure = TRUE;
}
# endif /* USE_LOCALE_MESSAGES */
# ifdef USE_LOCALE_MONETARY
if (! my_setlocale(LC_MONETARY,
(!done && (lang || PerlEnv_getenv("LC_MONETARY")))
? setlocale_init : NULL))
{
setlocale_failure = TRUE;
}
# endif /* USE_LOCALE_MONETARY */
}
# endif /* LC_ALL */
#endif /* !LOCALE_ENVIRON_REQUIRED */
/* We try each locale in the list until we get one that works, or exhaust
* the list */
trial_locales[0] = setlocale_init;
trial_locales_count = 1;
for (i= 0; i < trial_locales_count; i++) {
const char * trial_locale = trial_locales[i];
if (i > 0) {
/* XXX This is to preserve old behavior for LOCALE_ENVIRON_REQUIRED
* when i==0, but I (khw) don't think that behavior makes much
* sense */
setlocale_failure = FALSE;
#ifdef WIN32
/* On Windows machines, an entry of "" after the 0th means to use
* the system default locale, which we now proceed to get. */
if (strEQ(trial_locale, "")) {
unsigned int j;
/* Note that this may change the locale, but we are going to do
* that anyway just below */
system_default_locale = setlocale(LC_ALL, "");
/* Skip if invalid or it's already on the list of locales to
* try */
if (! system_default_locale) {
goto next_iteration;
}
for (j = 0; j < trial_locales_count; j++) {
if (strEQ(system_default_locale, trial_locales[j])) {
goto next_iteration;
}
}
trial_locale = system_default_locale;
}
#endif
}
#ifdef LC_ALL
if (! my_setlocale(LC_ALL, trial_locale)) {
setlocale_failure = TRUE;
}
else {
/* Since LC_ALL succeeded, it should have changed all the other
* categories it can to its value; so we massage things so that the
* setlocales below just return their category's current values.
* This adequately handles the case in NetBSD where LC_COLLATE may
* not be defined for a locale, and setting it individually will
* fail, whereas setting LC_ALL suceeds, leaving LC_COLLATE set to
* the POSIX locale. */
trial_locale = NULL;
}
#endif /* LC_ALL */
if (!setlocale_failure) {
#ifdef USE_LOCALE_CTYPE
Safefree(curctype);
if (! (curctype = my_setlocale(LC_CTYPE, trial_locale)))
setlocale_failure = TRUE;
else
curctype = savepv(curctype);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
Safefree(curcoll);
if (! (curcoll = my_setlocale(LC_COLLATE, trial_locale)))
setlocale_failure = TRUE;
else
curcoll = savepv(curcoll);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
Safefree(curnum);
if (! (curnum = my_setlocale(LC_NUMERIC, trial_locale)))
setlocale_failure = TRUE;
else
curnum = savepv(curnum);
#endif /* USE_LOCALE_NUMERIC */
#ifdef USE_LOCALE_MESSAGES
if (! (my_setlocale(LC_MESSAGES, trial_locale)))
setlocale_failure = TRUE;
#endif /* USE_LOCALE_MESSAGES */
#ifdef USE_LOCALE_MONETARY
if (! (my_setlocale(LC_MONETARY, trial_locale)))
setlocale_failure = TRUE;
#endif /* USE_LOCALE_MONETARY */
if (! setlocale_failure) { /* Success */
break;
}
}
/* Here, something failed; will need to try a fallback. */
ok = 0;
if (i == 0) {
unsigned int j;
if (locwarn) { /* Output failure info only on the first one */
#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, "and possibly others\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");
}
/* Calculate what fallback locales to try. We have avoided this
* until we have to, becuase failure is quite unlikely. This will
* usually change the upper bound of the loop we are in.
*
* Since the system's default way of setting the locale has not
* found one that works, We use Perl's defined ordering: LC_ALL,
* LANG, and the C locale. We don't try the same locale twice, so
* don't add to the list if already there. (On POSIX systems, the
* LC_ALL element will likely be a repeat of the 0th element "",
* but there's no harm done by doing it explicitly */
if (lc_all) {
for (j = 0; j < trial_locales_count; j++) {
if (strEQ(lc_all, trial_locales[j])) {
goto done_lc_all;
}
}
trial_locales[trial_locales_count++] = lc_all;
}
done_lc_all:
if (lang) {
for (j = 0; j < trial_locales_count; j++) {
if (strEQ(lang, trial_locales[j])) {
goto done_lang;
}
}
trial_locales[trial_locales_count++] = lang;
}
done_lang:
#if defined(WIN32) && defined(LC_ALL)
/* For Windows, we also try the system default locale before "C".
* (If there exists a Windows without LC_ALL we skip this because
* it gets too complicated. For those, the "C" is the next
* fallback possibility). The "" is the same as the 0th element of
* the array, but the code at the loop above knows to treat it
* differently when not the 0th */
trial_locales[trial_locales_count++] = "";
#endif
for (j = 0; j < trial_locales_count; j++) {
if (strEQ("C", trial_locales[j])) {
goto done_C;
}
}
trial_locales[trial_locales_count++] = "C";
done_C: ;
} /* end of first time through the loop */
#ifdef WIN32
next_iteration: ;
#endif
} /* end of looping through the trial locales */
if (ok < 1) { /* If we tried to fallback */
const char* msg;
if (! setlocale_failure) { /* fallback succeeded */
msg = "Falling back to";
}
else { /* fallback failed */
/* We dropped off the end of the loop, so have to decrement i to
* get back to the value the last time through */
i--;
ok = -1;
msg = "Failed to fall back to";
/* To continue, we should use whatever values we've got */
#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 */
}
if (locwarn) {
const char * description;
const char * name = "";
if (strEQ(trial_locales[i], "C")) {
description = "the standard locale";
name = "C";
}
else if (strEQ(trial_locales[i], "")) {
description = "the system default locale";
if (system_default_locale) {
name = system_default_locale;
}
}
else {
description = "a fallback locale";
name = trial_locales[i];
}
if (name && strNE(name, "")) {
PerlIO_printf(Perl_error_log,
"perl: warning: %s %s (\"%s\").\n", msg, description, name);
}
else {
PerlIO_printf(Perl_error_log,
"perl: warning: %s %s.\n", msg, description);
}
}
} /* End of tried to fallback */
#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(), nor MB_CUR_MAX, 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) {
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Could not find current locale for category %d\n",
category));
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"))
{
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Current locale for category %d is %s\n",
category, save_input_locale));
Safefree(save_input_locale);
return FALSE;
}
#if defined(USE_LOCALE_CTYPE) \
&& (defined(MB_CUR_MAX) || (defined(HAS_NL_LANGINFO) && defined(CODESET)))
{ /* Next try nl_langinfo or MB_CUR_MAX if available */
char *save_ctype_locale = NULL;
bool is_utf8;
if (category != LC_CTYPE) { /* These work only on LC_CTYPE */
/* Get the current LC_CTYPE locale */
save_ctype_locale = stdize_locale(savepv(setlocale(LC_CTYPE, NULL)));
if (! save_ctype_locale) {
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Could not find current locale for LC_CTYPE\n"));
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)) {
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Could not change LC_CTYPE locale to %s\n",
save_input_locale));
Safefree(save_ctype_locale);
goto cant_use_nllanginfo;
}
}
DEBUG_L(PerlIO_printf(Perl_debug_log, "Current LC_CTYPE locale=%s\n",
save_input_locale));
/* Here the current LC_CTYPE is set to the locale of the category whose
* information is desired. This means that nl_langinfo() and MB_CUR_MAX
* should give the correct results */
# if defined(HAS_NL_LANGINFO) && defined(CODESET)
{
char *codeset = savepv(nl_langinfo(CODESET));
if (codeset && strNE(codeset, "")) {
/* 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"));
DEBUG_L(PerlIO_printf(Perl_debug_log,
"\tnllanginfo returned CODESET '%s'; ?UTF8 locale=%d\n",
codeset, is_utf8));
Safefree(codeset);
Safefree(save_input_locale);
return is_utf8;
}
Safefree(codeset);
}
# endif
# ifdef MB_CUR_MAX
/* Here, either we don't have nl_langinfo, or it didn't return a
* codeset. Try MB_CUR_MAX */
/* Standard UTF-8 needs at least 4 bytes to represent the maximum
* Unicode code point. Since UTF-8 is the only non-single byte
* encoding we handle, we just say any such encoding is UTF-8, and if
* turns out to be wrong, other things will fail */
is_utf8 = MB_CUR_MAX >= 4;
DEBUG_L(PerlIO_printf(Perl_debug_log,
"\tMB_CUR_MAX=%d; ?UTF8 locale=%d\n",
(int) MB_CUR_MAX, is_utf8));
Safefree(save_input_locale);
# ifdef HAS_MBTOWC
/* ... But, most system that have MB_CUR_MAX will also have mbtowc(),
* since they are both in the C99 standard. We can feed a known byte
* string to the latter function, and check that it gives the expected
* result */
if (is_utf8) {
wchar_t wc;
PERL_UNUSED_RESULT(mbtowc(&wc, NULL, 0));/* Reset any shift state */
errno = 0;
if (mbtowc(&wc, HYPHEN_UTF8, strlen(HYPHEN_UTF8))
!= strlen(HYPHEN_UTF8)
|| wc != (wchar_t) 0x2010)
{
is_utf8 = FALSE;
DEBUG_L(PerlIO_printf(Perl_debug_log, "\thyphen=U+%x\n", wc));
DEBUG_L(PerlIO_printf(Perl_debug_log,
"\treturn from mbtowc=%d; errno=%d; ?UTF8 locale=0\n",
mbtowc(&wc, HYPHEN_UTF8, strlen(HYPHEN_UTF8)), errno));
}
}
# endif
/* If we switched LC_CTYPE, switch back */
if (save_ctype_locale) {
setlocale(LC_CTYPE, save_ctype_locale);
Safefree(save_ctype_locale);
}
return is_utf8;
# endif
}
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);
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Locale %s ends with UTF-8 in name\n",
save_input_locale));
return TRUE;
}
}
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Locale %s doesn't end with UTF-8 in name\n",
save_input_locale));
}
#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')
{
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Locale %s ends with 10056 in name, is UTF-8 locale\n",
save_input_locale));
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")) {
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Locale %s has 8859 in name, not UTF-8 locale\n",
save_input_locale));
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) {
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Could not find current locale for LC_MONETARY\n"));
goto cant_use_monetary;
}
if (strNE(save_monetary_locale, save_input_locale)) {
if (! setlocale(LC_MONETARY, save_input_locale)) {
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Could not change LC_MONETARY locale to %s\n",
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)) {
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Currency symbol for %s is not legal UTF-8\n",
save_input_locale));
illegal_utf8 = TRUE;
}
else if (is_ascii_string((U8 *) lc->currency_symbol, 0)) {
DEBUG_L(PerlIO_printf(Perl_debug_log, "Currency symbol for %s contains only ASCII; can't use for determining if UTF-8 locale\n", save_input_locale));
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)
* */
DEBUG_L(PerlIO_printf(Perl_debug_log, "\tis_utf8=%d\n", (illegal_utf8)
? FALSE
: ! only_ascii));
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
DEBUG_L(PerlIO_printf(Perl_debug_log,
"Assuming locale %s is not a UTF-8 locale\n",
save_input_locale));
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:
*/
|
