X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/1a4f13e16aff4779e298a3c8e3fdbfb4ea193cd1..0d42058edbaed311ab41cba6c791941297388c3b:/locale.c diff --git a/locale.c b/locale.c index 0ecce3c..a1fe449 100644 --- a/locale.c +++ b/locale.c @@ -93,7 +93,6 @@ void Perl_set_numeric_radix(pTHX) { #ifdef USE_LOCALE_NUMERIC - dVAR; # ifdef HAS_LOCALECONV const struct lconv* const lc = localeconv(); @@ -107,7 +106,7 @@ Perl_set_numeric_radix(pTHX) 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) + if (! is_invariant_string((U8 *) lc->decimal_point, 0) && is_utf8_string((U8 *) lc->decimal_point, 0) && _is_cur_LC_category_utf8(LC_NUMERIC)) { @@ -127,6 +126,20 @@ Perl_set_numeric_radix(pTHX) #endif /* USE_LOCALE_NUMERIC */ } +/* Is the C string input 'name' "C" or "POSIX"? If so, and 'name' is the + * return of setlocale(), then this is extremely likely to be the C or POSIX + * locale. However, the output of setlocale() is documented to be opaque, but + * the odds are extremely small that it would return these two strings for some + * other locale. Note that VMS in these two locales includes many non-ASCII + * characters as controls and punctuation (below are hex bytes): + * cntrl: 00-1F 7F 84-97 9B-9F + * punct: 21-2F 3A-40 5B-60 7B-7E A1-A3 A5 A7-AB B0-B3 B5-B7 B9-BD BF-CF D1-DD DF-EF F1-FD + * Oddly, none there are listed as alphas, though some represent alphabetics + * http://www.nntp.perl.org/group/perl.perl5.porters/2013/02/msg198753.html */ +#define isNAME_C_OR_POSIX(name) ((name) != NULL \ + && ((*(name) == 'C' && (*(name + 1)) == '\0') \ + || strEQ((name), "POSIX"))) + void Perl_new_numeric(pTHX_ const char *newnum) { @@ -146,7 +159,7 @@ Perl_new_numeric(pTHX_ const char *newnum) * dot. * * This sets several interpreter-level variables: - * PL_numeric_name The default locale's name: a copy of 'newnum' + * PL_numeric_name The underlying 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 program's underlying * locale @@ -164,7 +177,6 @@ Perl_new_numeric(pTHX_ const char *newnum) * POSIX::setlocale() */ char *save_newnum; - dVAR; if (! newnum) { Safefree(PL_numeric_name); @@ -180,8 +192,7 @@ Perl_new_numeric(pTHX_ const char *newnum) PL_numeric_name = save_newnum; } - PL_numeric_standard = ((*save_newnum == 'C' && save_newnum[1] == '\0') - || strEQ(save_newnum, "POSIX")); + PL_numeric_standard = isNAME_C_OR_POSIX(save_newnum); PL_numeric_local = TRUE; /* Keep LC_NUMERIC in the C locale. This is for XS modules, so they don't @@ -191,6 +202,8 @@ Perl_new_numeric(pTHX_ const char *newnum) set_numeric_radix(); +#else + PERL_UNUSED_ARG(newnum); #endif /* USE_LOCALE_NUMERIC */ } @@ -198,18 +211,16 @@ 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 (_NOT_IN_NUMERIC_STANDARD) { - setlocale(LC_NUMERIC, "C"); - PL_numeric_standard = TRUE; - PL_numeric_local = FALSE; - set_numeric_radix(); - } + /* Toggle the LC_NUMERIC locale to C. Most code should use the macros like + * SET_NUMERIC_STANDARD() in perl.h instead of calling this directly. The + * macro avoids calling this routine if toggling isn't necessary according + * to our records (which could be wrong if some XS code has changed the + * locale behind our back) */ + + setlocale(LC_NUMERIC, "C"); + PL_numeric_standard = TRUE; + PL_numeric_local = isNAME_C_OR_POSIX(PL_numeric_name); + set_numeric_radix(); DEBUG_L(PerlIO_printf(Perl_debug_log, "Underlying LC_NUMERIC locale now is C\n")); @@ -220,18 +231,16 @@ 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 (_NOT_IN_NUMERIC_LOCAL) { - setlocale(LC_NUMERIC, PL_numeric_name); - PL_numeric_standard = FALSE; - PL_numeric_local = TRUE; - set_numeric_radix(); - } + /* Toggle the LC_NUMERIC locale to the current underlying default. Most + * code should use the macros like SET_NUMERIC_LOCAL() in perl.h instead of + * calling this directly. The macro avoids calling this routine if + * toggling isn't necessary according to our records (which could be wrong + * if some XS code has changed the locale behind our back) */ + + setlocale(LC_NUMERIC, PL_numeric_name); + PL_numeric_standard = isNAME_C_OR_POSIX(PL_numeric_name); + 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)); @@ -263,6 +272,13 @@ Perl_new_ctype(pTHX_ const char *newctype) PERL_ARGS_ASSERT_NEW_CTYPE; + /* We will replace any bad locale warning with 1) nothing if the new one is + * ok; or 2) a new warning for the bad new locale */ + if (PL_warn_locale) { + SvREFCNT_dec_NN(PL_warn_locale); + PL_warn_locale = NULL; + } + 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 @@ -271,6 +287,18 @@ Perl_new_ctype(pTHX_ const char *newctype) Copy(PL_fold_latin1, PL_fold_locale, 256, U8); } else { + /* Assume enough space for every character being bad. 4 spaces each + * for the 94 printable characters that are output like "'x' "; and 5 + * spaces each for "'\\' ", "'\t' ", and "'\n' "; plus a terminating + * NUL */ + char bad_chars_list[ (94 * 4) + (3 * 5) + 1 ]; + + bool check_for_problems = ckWARN_d(WARN_LOCALE); /* No warnings means + no check */ + bool multi_byte_locale = FALSE; /* Assume is a single-byte locale + to start */ + unsigned int bad_count = 0; /* Count of bad characters */ + for (i = 0; i < 256; i++) { if (isUPPER_LC((U8) i)) PL_fold_locale[i] = (U8) toLOWER_LC((U8) i); @@ -278,6 +306,104 @@ Perl_new_ctype(pTHX_ const char *newctype) PL_fold_locale[i] = (U8) toUPPER_LC((U8) i); else PL_fold_locale[i] = (U8) i; + + /* If checking for locale problems, see if the native ASCII-range + * printables plus \n and \t are in their expected categories in + * the new locale. If not, this could mean big trouble, upending + * Perl's and most programs' assumptions, like having a + * metacharacter with special meaning become a \w. Fortunately, + * it's very rare to find locales that aren't supersets of ASCII + * nowadays. It isn't a problem for most controls to be changed + * into something else; we check only \n and \t, though perhaps \r + * could be an issue as well. */ + if (check_for_problems + && (isGRAPH_A(i) || isBLANK_A(i) || i == '\n')) + { + if ((isALPHANUMERIC_A(i) && ! isALPHANUMERIC_LC(i)) + || (isPUNCT_A(i) && ! isPUNCT_LC(i)) + || (isBLANK_A(i) && ! isBLANK_LC(i)) + || (i == '\n' && ! isCNTRL_LC(i))) + { + if (bad_count) { /* Separate multiple entries with a + blank */ + bad_chars_list[bad_count++] = ' '; + } + bad_chars_list[bad_count++] = '\''; + if (isPRINT_A(i)) { + bad_chars_list[bad_count++] = (char) i; + } + else { + bad_chars_list[bad_count++] = '\\'; + if (i == '\n') { + bad_chars_list[bad_count++] = 'n'; + } + else { + assert(i == '\t'); + bad_chars_list[bad_count++] = 't'; + } + } + bad_chars_list[bad_count++] = '\''; + bad_chars_list[bad_count] = '\0'; + } + } + } + +#ifdef MB_CUR_MAX + /* We only handle single-byte locales (outside of UTF-8 ones; so if + * this locale requires than one byte, there are going to be + * problems. */ + if (check_for_problems && MB_CUR_MAX > 1 + + /* Some platforms return MB_CUR_MAX > 1 for even the "C" + * locale. Just assume that the implementation for them (plus + * for POSIX) is correct and the > 1 value is spurious. (Since + * these are specially handled to never be considered UTF-8 + * locales, as long as this is the only problem, everything + * should work fine */ + && strNE(newctype, "C") && strNE(newctype, "POSIX")) + { + multi_byte_locale = TRUE; + } +#endif + + if (bad_count || multi_byte_locale) { + PL_warn_locale = Perl_newSVpvf(aTHX_ + "Locale '%s' may not work well.%s%s%s\n", + newctype, + (multi_byte_locale) + ? " Some characters in it are not recognized by" + " Perl." + : "", + (bad_count) + ? "\nThe following characters (and maybe others)" + " may not have the same meaning as the Perl" + " program expects:\n" + : "", + (bad_count) + ? bad_chars_list + : "" + ); + /* If we are actually in the scope of the locale, output the + * message now. Otherwise we save it to be output at the first + * operation using this locale, if that actually happens. Most + * programs don't use locales, so they are immune to bad ones */ + if (IN_LC(LC_CTYPE)) { + + /* We have to save 'newctype' because the setlocale() just + * below may destroy it. The next setlocale() further down + * should restore it properly so that the intermediate change + * here is transparent to this function's caller */ + const char * const badlocale = savepv(newctype); + + setlocale(LC_CTYPE, "C"); + + /* The '0' below suppresses a bogus gcc compiler warning */ + Perl_warner(aTHX_ packWARN(WARN_LOCALE), SvPVX(PL_warn_locale), 0); + setlocale(LC_CTYPE, badlocale); + Safefree(badlocale); + SvREFCNT_dec_NN(PL_warn_locale); + PL_warn_locale = NULL; + } } } @@ -288,6 +414,32 @@ Perl_new_ctype(pTHX_ const char *newctype) } void +Perl__warn_problematic_locale() +{ + +#ifdef USE_LOCALE_CTYPE + + dTHX; + + /* Internal-to-core function that outputs the message in PL_warn_locale, + * and then NULLS it. Should be called only through the macro + * _CHECK_AND_WARN_PROBLEMATIC_LOCALE */ + + if (PL_warn_locale) { + /*GCC_DIAG_IGNORE(-Wformat-security); Didn't work */ + Perl_ck_warner(aTHX_ packWARN(WARN_LOCALE), + SvPVX(PL_warn_locale), + 0 /* dummy to avoid compiler warning */ ); + /* GCC_DIAG_RESTORE; */ + SvREFCNT_dec_NN(PL_warn_locale); + PL_warn_locale = NULL; + } + +#endif + +} + +void Perl_new_collate(pTHX_ const char *newcoll) { #ifdef USE_LOCALE_COLLATE @@ -300,8 +452,6 @@ Perl_new_collate(pTHX_ const char *newcoll) * should be called directly only from this file and from * POSIX::setlocale() */ - dVAR; - if (! newcoll) { if (PL_collation_name) { ++PL_collation_ix; @@ -318,8 +468,7 @@ Perl_new_collate(pTHX_ const char *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")); + PL_collation_standard = isNAME_C_OR_POSIX(newcoll); { /* 2: at most so many chars ('a', 'b'). */ @@ -337,6 +486,8 @@ Perl_new_collate(pTHX_ const char *newcoll) } } +#else + PERL_UNUSED_ARG(newcoll); #endif /* USE_LOCALE_COLLATE */ } @@ -357,7 +508,7 @@ Perl_my_setlocale(pTHX_ int category, const char* locale) * otherwise to use the particular category's variable if set; otherwise to * use the LANG variable. */ - bool override_LC_ALL = 0; + bool override_LC_ALL = FALSE; char * result; if (locale && strEQ(locale, "")) { @@ -423,7 +574,7 @@ Perl_my_setlocale(pTHX_ int category, const char* locale) return result; } - /* Here the input locale was LC_ALL, and we have set it to what is in the + /* Here the input category 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 @@ -493,8 +644,6 @@ Perl_init_i18nl10n(pTHX_ int printwarn) int ok = 1; #if defined(USE_LOCALE) - dVAR; - #ifdef USE_LOCALE_CTYPE char *curctype = NULL; #endif /* USE_LOCALE_CTYPE */ @@ -505,7 +654,7 @@ Perl_init_i18nl10n(pTHX_ int printwarn) char *curnum = NULL; #endif /* USE_LOCALE_NUMERIC */ #ifdef __GLIBC__ - char * const language = PerlEnv_getenv("LANGUAGE"); + const char * const language = savepv(PerlEnv_getenv("LANGUAGE")); #endif /* NULL uses the existing already set up locale */ @@ -514,14 +663,22 @@ Perl_init_i18nl10n(pTHX_ int printwarn) : ""; 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"); + const char * const lc_all = savepv(PerlEnv_getenv("LC_ALL")); + const char * const lang = savepv(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)))); + + /* A later getenv() could zap this, so only use here */ + const char * const bad_lang_use_once = PerlEnv_getenv("PERL_BADLANG"); + + const bool locwarn = (printwarn > 1 + || (printwarn + && (! bad_lang_use_once + || ( + /* disallow with "" or "0" */ + *bad_lang_use_once + && strNE("0", bad_lang_use_once))))); bool done = FALSE; #ifdef WIN32 /* In some systems you can find out the system default locale @@ -771,7 +928,7 @@ Perl_init_i18nl10n(pTHX_ int printwarn) } /* Calculate what fallback locales to try. We have avoided this - * until we have to, becuase failure is quite unlikely. This will + * until we have to, because 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 @@ -926,6 +1083,15 @@ Perl_init_i18nl10n(pTHX_ int printwarn) Safefree(curnum); #endif /* USE_LOCALE_NUMERIC */ +#ifdef __GLIBC__ + Safefree(language); +#endif + + Safefree(lc_all); + Safefree(lang); + +#else /* !USE_LOCALE */ + PERL_UNUSED_ARG(printwarn); #endif /* USE_LOCALE */ return ok; @@ -945,7 +1111,6 @@ 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 */ @@ -1003,8 +1168,10 @@ Perl__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. */ + * could give the wrong result. The result will very likely be correct for + * languages that have commonly used non-ASCII characters, but for notably + * English, it comes down to if the locale's name ends in something like + * "UTF-8". It errs on the side of not being a UTF-8 locale. */ char *save_input_locale = NULL; STRLEN final_pos; @@ -1022,9 +1189,7 @@ Perl__is_cur_LC_category_utf8(pTHX_ int 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")) - { + if (isNAME_C_OR_POSIX(save_input_locale)) { DEBUG_L(PerlIO_printf(Perl_debug_log, "Current locale for category %d is %s\n", category, save_input_locale)); @@ -1043,12 +1208,13 @@ Perl__is_cur_LC_category_utf8(pTHX_ int category) 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))); + save_ctype_locale = 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; } + save_ctype_locale = stdize_locale(savepv(save_ctype_locale)); /* 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 @@ -1076,8 +1242,9 @@ Perl__is_cur_LC_category_utf8(pTHX_ int category) # if defined(HAS_NL_LANGINFO) && defined(CODESET) { - char *codeset = savepv(nl_langinfo(CODESET)); + char *codeset = nl_langinfo(CODESET); if (codeset && strNE(codeset, "")) { + codeset = savepv(codeset); /* If we switched LC_CTYPE, switch back */ if (save_ctype_locale) { @@ -1095,7 +1262,6 @@ Perl__is_cur_LC_category_utf8(pTHX_ int category) Safefree(save_input_locale); return is_utf8; } - Safefree(codeset); } # endif @@ -1124,16 +1290,14 @@ Perl__is_cur_LC_category_utf8(pTHX_ int category) * result */ if (is_utf8) { wchar_t wc; - GCC_DIAG_IGNORE(-Wunused-result); - (void) mbtowc(&wc, NULL, 0); /* Reset any shift state */ - GCC_DIAG_RESTORE; + PERL_UNUSED_RESULT(mbtowc(&wc, NULL, 0));/* Reset any shift state */ 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, "\thyphen=U+%x\n", (unsigned int)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)); @@ -1153,125 +1317,64 @@ Perl__is_cur_LC_category_utf8(pTHX_ int category) cant_use_nllanginfo: -#endif /* HAS_NL_LANGINFO etc */ +#else /* nl_langinfo should work if available, so don't bother compiling this + fallback code. The final fallback of looking at the name is + compiled, and will be executed if nl_langinfo fails */ - /* 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; - } + /* nl_langinfo not available or failed somehow. Next try looking at the + * currency symbol to see if it disambiguates things. 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, as the odds of a non-UTF8 string being valid UTF-8 are quite small + * */ #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(); + bool is_utf8 = FALSE; + struct lconv* lc; + + /* Like above for LC_CTYPE, we first set LC_MONETARY to the locale of + * the desired category, if it isn't that locale already */ if (category != LC_MONETARY) { - save_monetary_locale = stdize_locale(savepv(setlocale(LC_MONETARY, - NULL))); + save_monetary_locale = 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; } + save_monetary_locale = stdize_locale(savepv(save_monetary_locale)); - 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; - } + if (strEQ(save_monetary_locale, save_input_locale)) { + Safefree(save_monetary_locale); + save_monetary_locale = NULL; + } + else 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; - } + lc = localeconv(); + if (! lc + || ! lc->currency_symbol + || is_invariant_string((U8 *) lc->currency_symbol, 0)) + { + DEBUG_L(PerlIO_printf(Perl_debug_log, "Couldn't get currency symbol for %s, or contains only ASCII; can't use for determining if UTF-8 locale\n", save_input_locale)); + only_ascii = TRUE; + } + else { + is_utf8 = is_utf8_string((U8 *) lc->currency_symbol, 0); } /* If we changed it, restore LC_MONETARY to its original locale */ @@ -1280,86 +1383,179 @@ Perl__is_cur_LC_category_utf8(pTHX_ int category) 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; + if (! only_ascii) { + /* 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. */ + DEBUG_L(PerlIO_printf(Perl_debug_log, "\t?Currency symbol for %s is UTF-8=%d\n", + save_input_locale, is_utf8)); + Safefree(save_input_locale); + return is_utf8; + } } cant_use_monetary: # endif /* USE_LOCALE_MONETARY */ #endif /* HAS_LOCALECONV */ -#if 0 && defined(HAS_STRERROR) && defined(USE_LOCALE_MESSAGES) +#if defined(HAS_STRFTIME) && defined(USE_LOCALE_TIME) + +/* Still haven't found a non-ASCII string to disambiguate UTF-8 or not. Try + * the names of the months and weekdays, timezone, and am/pm indicator */ + { + char *save_time_locale = NULL; + int hour = 10; + bool is_dst = FALSE; + int dom = 1; + int month = 0; + int i; + char * formatted_time; + + + /* Like above for LC_MONETARY, we set LC_TIME to the locale of the + * desired category, if it isn't that locale already */ + + if (category != LC_TIME) { + + save_time_locale = setlocale(LC_TIME, NULL); + if (! save_time_locale) { + DEBUG_L(PerlIO_printf(Perl_debug_log, + "Could not find current locale for LC_TIME\n")); + goto cant_use_time; + } + save_time_locale = stdize_locale(savepv(save_time_locale)); + + if (strEQ(save_time_locale, save_input_locale)) { + Safefree(save_time_locale); + save_time_locale = NULL; + } + else if (! setlocale(LC_TIME, save_input_locale)) { + DEBUG_L(PerlIO_printf(Perl_debug_log, + "Could not change LC_TIME locale to %s\n", + save_input_locale)); + Safefree(save_time_locale); + goto cant_use_time; + } + } + + /* Here the current LC_TIME is set to the locale of the category + * whose information is desired. Look at all the days of the week and + * month names, and the timezone and am/pm indicator for UTF-8 variant + * characters. The first such a one found will tell us if the locale + * is UTF-8 or not */ + + for (i = 0; i < 7 + 12; i++) { /* 7 days; 12 months */ + formatted_time = my_strftime("%A %B %Z %p", + 0, 0, hour, dom, month, 112, 0, 0, is_dst); + if (! formatted_time || is_invariant_string((U8 *) formatted_time, 0)) { + + /* Here, we didn't find a non-ASCII. Try the next time through + * with the complemented dst and am/pm, and try with the next + * weekday. After we have gotten all weekdays, try the next + * month */ + is_dst = ! is_dst; + hour = (hour + 12) % 24; + dom++; + if (i > 6) { + month++; + } + continue; + } + + /* Here, we have a non-ASCII. Return TRUE is it is valid UTF8; + * false otherwise. But first, restore LC_TIME to its original + * locale if we changed it */ + if (save_time_locale) { + setlocale(LC_TIME, save_time_locale); + Safefree(save_time_locale); + } + + DEBUG_L(PerlIO_printf(Perl_debug_log, "\t?time-related strings for %s are UTF-8=%d\n", + save_input_locale, + is_utf8_string((U8 *) formatted_time, 0))); + Safefree(save_input_locale); + return is_utf8_string((U8 *) formatted_time, 0); + } + + /* Falling off the end of the loop indicates all the names were just + * ASCII. Go on to the next test. If we changed it, restore LC_TIME + * to its original locale */ + if (save_time_locale) { + setlocale(LC_TIME, save_time_locale); + Safefree(save_time_locale); + } + DEBUG_L(PerlIO_printf(Perl_debug_log, "All time-related words for %s contain only ASCII; can't use for determining if UTF-8 locale\n", save_input_locale)); + } + cant_use_time: + +#endif + +#if 0 && defined(USE_LOCALE_MESSAGES) && defined(HAS_SYS_ERRLIST) /* 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 + * on our dromedary test machine, which has over 700 locales. There, this + * added no value to looking at the currency symbol and the time strings. 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. */ + * utf8ness. The reason this doesn't help much is that the messages may not + * have been translated into the locale. The currency symbol and time strings + * are much more likely to have been translated. */ + { int e; - unsigned int failures = 0, non_ascii = 0; + bool is_utf8 = FALSE; + bool non_ascii = FALSE; char *save_messages_locale = NULL; + const char * errmsg = NULL; - /* Like above for LC_CTYPE, we set LC_MESSAGES to the locale of the - * desired category, if it isn't that locale already */ + /* Like above, 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))); + save_messages_locale = setlocale(LC_MESSAGES, NULL); if (! save_messages_locale) { + DEBUG_L(PerlIO_printf(Perl_debug_log, + "Could not find current locale for LC_MESSAGES\n")); goto cant_use_messages; } + save_messages_locale = stdize_locale(savepv(save_messages_locale)); if (strEQ(save_messages_locale, save_input_locale)) { - Safefree(save_input_locale); + Safefree(save_messages_locale); + save_messages_locale = NULL; } else if (! setlocale(LC_MESSAGES, save_input_locale)) { + DEBUG_L(PerlIO_printf(Perl_debug_log, + "Could not change LC_MESSAGES locale to %s\n", + 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 */ + * whose information is desired. Look through all the messages. We + * can't use Strerror() here because it may expand to code that + * segfaults in miniperl */ - 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++; + for (e = 0; e <= sys_nerr; e++) { + errno = 0; + errmsg = sys_errlist[e]; + if (errno || !errmsg) { break; } - else if (! is_ascii_string(errmsg, 0)) { - non_ascii++; + errmsg = savepv(errmsg); + if (! is_invariant_string((U8 *) errmsg, 0)) { + non_ascii = TRUE; + is_utf8 = is_utf8_string((U8 *) errmsg, 0); + break; } } + Safefree(errmsg); /* And, if we changed it, restore LC_MESSAGES to its original locale */ if (save_messages_locale) { @@ -1367,15 +1563,98 @@ Perl__is_cur_LC_category_utf8(pTHX_ int category) 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; + if (non_ascii) { + + /* 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 */ + DEBUG_L(PerlIO_printf(Perl_debug_log, "\t?error messages for %s are UTF-8=%d\n", + save_input_locale, + is_utf8)); + Safefree(save_input_locale); + return is_utf8; + } + DEBUG_L(PerlIO_printf(Perl_debug_log, "All error messages for %s contain only ASCII; can't use for determining if UTF-8 locale\n", save_input_locale)); } cant_use_messages: #endif +#endif /* the code that is compiled when no nl_langinfo */ + +#ifndef EBCDIC /* On os390, even if the name ends with "UTF-8', it isn't a + UTF-8 locale */ + /* As a last resort, look at the locale name to see if it matches + * qr/UTF -? * 8 /ix, or some other common locale names. 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, but if it has UTF8 in the name, it is extremely likely to + * be a UTF-8 locale. Similarly for the other common names */ + + 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 (!isALPHA_FOLD_NE(*name, 't') + || isALPHA_FOLD_NE(*(name + 1), 'f')) + { + continue; + } + name += 2; + if (*(name) == '-') { + if ((name > save_input_locale + final_pos - 1)) { + break; + } + name++; + } + if (*(name) == '8') { + DEBUG_L(PerlIO_printf(Perl_debug_log, + "Locale %s ends with UTF-8 in name\n", + save_input_locale)); + Safefree(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)); + } +#endif + +#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. But + * since we are about to return FALSE anyway, there is no point in doing + * this extra work */ +#if 0 + 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; + } +#endif + DEBUG_L(PerlIO_printf(Perl_debug_log, "Assuming locale %s is not a UTF-8 locale\n", save_input_locale)); @@ -1414,11 +1693,9 @@ Perl_my_strerror(pTHX_ const int errnum) { * LC_MESSAGES */ #ifdef USE_LOCALE_MESSAGES - if (IN_LC(LC_MESSAGES)) { + if (! IN_LC(LC_MESSAGES)) { char * save_locale = setlocale(LC_MESSAGES, NULL); - if (! ((*save_locale == 'C' && save_locale[1] == '\0') - || strEQ(save_locale, "POSIX"))) - { + if (! isNAME_C_OR_POSIX(save_locale)) { char *errstr; /* The next setlocale likely will zap this, so create a copy */ @@ -1441,6 +1718,41 @@ Perl_my_strerror(pTHX_ const int errnum) { } /* + +=head1 Locale-related functions and macros + +=for apidoc sync_locale + +Changing the program's locale should be avoided by XS code. Nevertheless, +certain non-Perl libraries called from XS, such as C do so. When this +happens, Perl needs to be told that the locale has changed. Use this function +to do so, before returning to Perl. + +=cut +*/ + +void +Perl_sync_locale(pTHX) +{ + +#ifdef USE_LOCALE_CTYPE + new_ctype(setlocale(LC_CTYPE, NULL)); +#endif /* USE_LOCALE_CTYPE */ + +#ifdef USE_LOCALE_COLLATE + new_collate(setlocale(LC_COLLATE, NULL)); +#endif + +#ifdef USE_LOCALE_NUMERIC + set_numeric_local(); /* Switch from "C" to underlying LC_NUMERIC */ + new_numeric(setlocale(LC_NUMERIC, NULL)); +#endif /* USE_LOCALE_NUMERIC */ + +} + + + +/* * Local variables: * c-indentation-style: bsd * c-basic-offset: 4