X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/0bd48802b00657d8da2da444a1c97fb25cb7d562..c2de4d02ec9abcb746fff0e08aa79b17a217dbfa:/locale.c diff --git a/locale.c b/locale.c index 881ebd9..56cac85 100644 --- a/locale.c +++ b/locale.c @@ -1,7 +1,7 @@ /* locale.c * - * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, - * 2000, 2001, 2002, 2003, 2005, by Larry Wall and others + * 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. @@ -9,45 +9,54 @@ */ /* - * 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! + * 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_LOCALE -# include -#endif - #ifdef I_LANGINFO # include #endif #include "reentr.h" -#if defined(USE_LOCALE_NUMERIC) || defined(USE_LOCALE_COLLATE) +#ifdef USE_LOCALE + /* - * Standardize the locale name from a string returned by 'setlocale'. + * Standardize the locale name from a string returned by 'setlocale', possibly + * modifying that string. * - * The standard return value of setlocale() is either + * 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 unspecificed order) + * 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(). + * 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 * @@ -56,6 +65,8 @@ 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; @@ -75,41 +86,83 @@ S_stdize_locale(pTHX_ char *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 = Nullsv; + 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 = Nullsv; + 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 */ } -/* - * Set up for a new numeric locale. - */ 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; @@ -118,15 +171,17 @@ Perl_new_numeric(pTHX_ const char *newnum) return; } - if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) { + save_newnum = stdize_locale(savepv(newnum)); + if (! PL_numeric_name || strNE(PL_numeric_name, save_newnum)) { Safefree(PL_numeric_name); - PL_numeric_name = stdize_locale(savepv(newnum)); - PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0') - || strEQ(newnum, "POSIX")); - PL_numeric_local = TRUE; - set_numeric_radix(); + 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 */ } @@ -134,6 +189,11 @@ 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"); @@ -141,6 +201,8 @@ Perl_set_numeric_standard(pTHX) 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 */ } @@ -149,6 +211,11 @@ 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); @@ -156,6 +223,9 @@ Perl_set_numeric_local(pTHX) 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 */ } @@ -167,30 +237,62 @@ 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; - int i; + UV i; - for (i = 0; i < 256; i++) { - if (isUPPER_LC(i)) - PL_fold_locale[i] = toLOWER_LC(i); - else if (isLOWER_LC(i)) - PL_fold_locale[i] = toUPPER_LC(i); - else - PL_fold_locale[i] = 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; } -/* - * Set up for a new collation locale. - */ 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; @@ -218,8 +320,9 @@ Perl_new_collate(pTHX_ const char *newcoll) 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) - Perl_croak(aTHX_ "strxfrm() gets absurd"); + 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; } @@ -228,20 +331,160 @@ Perl_new_collate(pTHX_ const char *newcoll) #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) { - int ok = 1; - /* returns + /* 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 C locale, - * -1 = fallback to C locale failed + * 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; @@ -255,209 +498,374 @@ Perl_init_i18nl10n(pTHX_ int printwarn) #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 && + (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)))); + bool done = FALSE; + const char *system_default_locale = NULL; -#ifdef LOCALE_ENVIRON_REQUIRED + +#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. */ - bool done = FALSE; - -#ifdef LC_ALL +# ifdef LC_ALL if (lang) { - if (setlocale(LC_ALL, "")) + if (my_setlocale(LC_ALL, setlocale_init)) done = TRUE; else setlocale_failure = TRUE; } if (!setlocale_failure) { -#ifdef USE_LOCALE_CTYPE +# ifdef USE_LOCALE_CTYPE + Safefree(curctype); if (! (curctype = - setlocale(LC_CTYPE, + my_setlocale(LC_CTYPE, (!done && (lang || PerlEnv_getenv("LC_CTYPE"))) - ? "" : Nullch))) + ? setlocale_init : NULL))) setlocale_failure = TRUE; else curctype = savepv(curctype); -#endif /* USE_LOCALE_CTYPE */ -#ifdef USE_LOCALE_COLLATE +# endif /* USE_LOCALE_CTYPE */ +# ifdef USE_LOCALE_COLLATE + Safefree(curcoll); if (! (curcoll = - setlocale(LC_COLLATE, + my_setlocale(LC_COLLATE, (!done && (lang || PerlEnv_getenv("LC_COLLATE"))) - ? "" : Nullch))) + ? setlocale_init : NULL))) setlocale_failure = TRUE; else curcoll = savepv(curcoll); -#endif /* USE_LOCALE_COLLATE */ -#ifdef USE_LOCALE_NUMERIC +# endif /* USE_LOCALE_COLLATE */ +# ifdef USE_LOCALE_NUMERIC + Safefree(curnum); if (! (curnum = - setlocale(LC_NUMERIC, + my_setlocale(LC_NUMERIC, (!done && (lang || PerlEnv_getenv("LC_NUMERIC"))) - ? "" : Nullch))) + ? setlocale_init : NULL))) setlocale_failure = TRUE; else curnum = savepv(curnum); -#endif /* USE_LOCALE_NUMERIC */ +# 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 /* 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 (! setlocale(LC_ALL, "")) - setlocale_failure = TRUE; + 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) { + if (!setlocale_failure) { #ifdef USE_LOCALE_CTYPE - if (! (curctype = setlocale(LC_CTYPE, ""))) - setlocale_failure = TRUE; - else - curctype = savepv(curctype); + 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 - if (! (curcoll = setlocale(LC_COLLATE, ""))) - setlocale_failure = TRUE; - else - curcoll = savepv(curcoll); + 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 - if (! (curnum = setlocale(LC_NUMERIC, ""))) - setlocale_failure = TRUE; - else - curnum = savepv(curnum); + Safefree(curnum); + if (! (curnum = my_setlocale(LC_NUMERIC, trial_locale))) + 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 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"); + 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"); + 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 "); + 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 "); + 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 "); + if (! curnum) + PerlIO_printf(Perl_error_log, "LC_NUMERIC "); #endif /* USE_LOCALE_NUMERIC */ - PerlIO_printf(Perl_error_log, "\n"); + 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"); + 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 ? '"' : ')'); + 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 ? '"' : ')'); + 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); - } - } + { + 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"); + 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, + "\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 - PerlIO_printf(Perl_error_log, - " are supported and installed on your system.\n"); - } + for (j = 0; j < trial_locales_count; j++) { + if (strEQ("C", trial_locales[j])) { + goto done_C; + } + } + trial_locales[trial_locales_count++] = "C"; -#ifdef LC_ALL + done_C: ; + } /* end of first time through the loop */ - 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; - } +#ifdef WIN32 + next_iteration: ; +#endif -#else /* ! LC_ALL */ + } /* end of looping through the trial locales */ - 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; - } + 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--; -#endif /* ! LC_ALL */ + ok = -1; + msg = "Failed to fall back to"; + /* To continue, we should use whatever values we've got */ #ifdef USE_LOCALE_CTYPE - curctype = savepv(setlocale(LC_CTYPE, Nullch)); + Safefree(curctype); + curctype = savepv(setlocale(LC_CTYPE, NULL)); #endif /* USE_LOCALE_CTYPE */ #ifdef USE_LOCALE_COLLATE - curcoll = savepv(setlocale(LC_COLLATE, Nullch)); + Safefree(curcoll); + curcoll = savepv(setlocale(LC_COLLATE, NULL)); #endif /* USE_LOCALE_COLLATE */ #ifdef USE_LOCALE_NUMERIC - curnum = savepv(setlocale(LC_NUMERIC, Nullch)); + Safefree(curnum); + curnum = savepv(setlocale(LC_NUMERIC, NULL)); #endif /* USE_LOCALE_NUMERIC */ - } - else { + } + + 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); @@ -471,62 +879,22 @@ Perl_init_i18nl10n(pTHX_ int printwarn) new_numeric(curnum); #endif /* USE_LOCALE_NUMERIC */ - } - -#endif /* USE_LOCALE */ +#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); -#ifdef USE_PERLIO - { - /* Set PL_utf8locale to TRUE if using PerlIO _and_ - any of the following are true: - - nl_langinfo(CODESET) contains /^utf-?8/i - - $ENV{LC_ALL} contains /^utf-?8/i - - $ENV{LC_CTYPE} contains /^utf-?8/i - - $ENV{LANG} contains /^utf-?8/i - The LC_ALL, LC_CTYPE, LANG obey the usual override - hierarchy of locale environment variables. (LANGUAGE - affects only LC_MESSAGES only under glibc.) (If present, - it overrides LC_MESSAGES for GNU gettext, and it also - can have more than one locale, separated by spaces, - in case you need to know.) - 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. - */ - bool utf8locale = FALSE; - char *codeset = NULL; -#if defined(HAS_NL_LANGINFO) && defined(CODESET) - codeset = nl_langinfo(CODESET); -#endif - if (codeset) - utf8locale = (ibcmp(codeset, "UTF-8", 5) == 0 || - ibcmp(codeset, "UTF8", 4) == 0); -#if defined(USE_LOCALE) - else { /* nl_langinfo(CODESET) is supposed to correctly - * interpret the locale environment variables, - * but just in case it fails, let's do this manually. */ - if (lang) - utf8locale = (ibcmp(lang, "UTF-8", 5) == 0 || - ibcmp(lang, "UTF8", 4) == 0); -#ifdef USE_LOCALE_CTYPE - if (curctype) - utf8locale = (ibcmp(curctype, "UTF-8", 5) == 0 || - ibcmp(curctype, "UTF8", 4) == 0); -#endif - if (lc_all) - utf8locale = (ibcmp(lc_all, "UTF-8", 5) == 0 || - ibcmp(lc_all, "UTF8", 4) == 0); - } -#endif /* USE_LOCALE */ - if (utf8locale) - PL_utf8locale = TRUE; - } /* 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 @@ -539,9 +907,13 @@ Perl_init_i18nl10n(pTHX_ int printwarn) #ifdef USE_LOCALE_NUMERIC Safefree(curnum); #endif /* USE_LOCALE_NUMERIC */ + +#endif /* USE_LOCALE */ + return ok; } + #ifdef USE_LOCALE_COLLATE /* @@ -555,9 +927,12 @@ Perl_init_i18nl10n(pTHX_ int printwarn) 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. */ @@ -569,11 +944,11 @@ Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen) *(U32*)xbuf = PL_collation_ix; xout = sizeof(PL_collation_ix); for (xin = 0; xin < len; ) { - SSize_t xused; + Size_t xused; for (;;) { xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout); - if (xused == -1) + if (xused >= PERL_INT_MAX) goto bad; if ((STRLEN)xused < xAlloc - xout) break; @@ -602,12 +977,402 @@ Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen) #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; + GCC_DIAG_IGNORE(-Wunused-result); + (void) mbtowc(&wc, NULL, 0); /* Reset any shift state */ + GCC_DIAG_RESTORE; + errno = 0; + if ((size_t)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: t + * indent-tabs-mode: nil * End: * - * ex: set ts=8 sts=4 sw=4 noet: + * ex: set ts=8 sts=4 sw=4 et: */