| /* 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. |
| */ |
| |
| #include "EXTERN.h" |
| #define PERL_IN_LOCALE_C |
| #include "perl.h" |
| |
| #ifdef I_LANGINFO |
| # include <langinfo.h> |
| #endif |
| |
| #include "reentr.h" |
| |
| #if defined(USE_LOCALE_NUMERIC) || defined(USE_LOCALE_COLLATE) |
| /* |
| * Standardize the locale name from a string returned by 'setlocale'. |
| * |
| * The standard 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) |
| * |
| * 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(). |
| * |
| */ |
| 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); |
| } |
| } |
| else |
| PL_numeric_radix_sv = 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 |
| dVAR; |
| |
| if (! newnum) { |
| Safefree(PL_numeric_name); |
| PL_numeric_name = NULL; |
| PL_numeric_standard = TRUE; |
| PL_numeric_local = TRUE; |
| return; |
| } |
| |
| if (! PL_numeric_name || strNE(PL_numeric_name, 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(); |
| } |
| |
| #endif /* USE_LOCALE_NUMERIC */ |
| } |
| |
| void |
| Perl_set_numeric_standard(pTHX) |
| { |
| #ifdef USE_LOCALE_NUMERIC |
| dVAR; |
| |
| if (! PL_numeric_standard) { |
| setlocale(LC_NUMERIC, "C"); |
| PL_numeric_standard = TRUE; |
| PL_numeric_local = FALSE; |
| set_numeric_radix(); |
| } |
| |
| #endif /* USE_LOCALE_NUMERIC */ |
| } |
| |
| void |
| Perl_set_numeric_local(pTHX) |
| { |
| #ifdef USE_LOCALE_NUMERIC |
| dVAR; |
| |
| if (! PL_numeric_local) { |
| setlocale(LC_NUMERIC, PL_numeric_name); |
| PL_numeric_standard = FALSE; |
| PL_numeric_local = TRUE; |
| set_numeric_radix(); |
| } |
| |
| #endif /* USE_LOCALE_NUMERIC */ |
| } |
| |
| /* |
| * Set up for a new ctype locale. |
| */ |
| void |
| Perl_new_ctype(pTHX_ const char *newctype) |
| { |
| #ifdef USE_LOCALE_CTYPE |
| dVAR; |
| int i; |
| |
| PERL_ARGS_ASSERT_NEW_CTYPE; |
| |
| 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; |
| } |
| |
| #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 |
| dVAR; |
| |
| if (! newcoll) { |
| if (PL_collation_name) { |
| ++PL_collation_ix; |
| Safefree(PL_collation_name); |
| PL_collation_name = NULL; |
| } |
| PL_collation_standard = TRUE; |
| PL_collxfrm_base = 0; |
| PL_collxfrm_mult = 2; |
| return; |
| } |
| |
| if (! PL_collation_name || strNE(PL_collation_name, newcoll)) { |
| ++PL_collation_ix; |
| Safefree(PL_collation_name); |
| PL_collation_name = stdize_locale(savepv(newcoll)); |
| PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0') |
| || strEQ(newcoll, "POSIX")); |
| |
| { |
| /* 2: at most so many chars ('a', 'b'). */ |
| /* 50: surely no system expands a char more. */ |
| #define XFRMBUFSIZE (2 * 50) |
| char xbuf[XFRMBUFSIZE]; |
| const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE); |
| const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE); |
| const SSize_t mult = fb - fa; |
| if (mult < 1 && !(fa == 0 && fb == 0)) |
| Perl_croak(aTHX_ "panic: strxfrm() gets absurd - a => %"UVuf", ab => %"UVuf, |
| (UV) fa, (UV) fb); |
| PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0; |
| PL_collxfrm_mult = mult; |
| } |
| } |
| |
| #endif /* USE_LOCALE_COLLATE */ |
| } |
| |
| /* |
| * Initialize locale awareness. |
| */ |
| int |
| Perl_init_i18nl10n(pTHX_ int printwarn) |
| { |
| int ok = 1; |
| /* returns |
| * 1 = set ok or not applicable, |
| * 0 = fallback to C locale, |
| * -1 = fallback to C locale failed |
| */ |
| |
| #if defined(USE_LOCALE) |
| dVAR; |
| |
| #ifdef USE_LOCALE_CTYPE |
| char *curctype = NULL; |
| #endif /* USE_LOCALE_CTYPE */ |
| #ifdef USE_LOCALE_COLLATE |
| char *curcoll = NULL; |
| #endif /* USE_LOCALE_COLLATE */ |
| #ifdef USE_LOCALE_NUMERIC |
| char *curnum = NULL; |
| #endif /* USE_LOCALE_NUMERIC */ |
| #ifdef __GLIBC__ |
| char * const language = PerlEnv_getenv("LANGUAGE"); |
| #endif |
| char * const lc_all = PerlEnv_getenv("LC_ALL"); |
| char * const lang = PerlEnv_getenv("LANG"); |
| bool setlocale_failure = FALSE; |
| |
| #ifdef LOCALE_ENVIRON_REQUIRED |
| |
| /* |
| * Ultrix setlocale(..., "") fails if there are no environment |
| * variables from which to get a locale name. |
| */ |
| |
| bool done = FALSE; |
| |
| #ifdef LC_ALL |
| if (lang) { |
| if (setlocale(LC_ALL, "")) |
| done = TRUE; |
| else |
| setlocale_failure = TRUE; |
| } |
| if (!setlocale_failure) { |
| #ifdef USE_LOCALE_CTYPE |
| Safefree(curctype); |
| if (! (curctype = |
| setlocale(LC_CTYPE, |
| (!done && (lang || PerlEnv_getenv("LC_CTYPE"))) |
| ? "" : NULL))) |
| setlocale_failure = TRUE; |
| else |
| curctype = savepv(curctype); |
| #endif /* USE_LOCALE_CTYPE */ |
| #ifdef USE_LOCALE_COLLATE |
| Safefree(curcoll); |
| if (! (curcoll = |
| setlocale(LC_COLLATE, |
| (!done && (lang || PerlEnv_getenv("LC_COLLATE"))) |
| ? "" : NULL))) |
| setlocale_failure = TRUE; |
| else |
| curcoll = savepv(curcoll); |
| #endif /* USE_LOCALE_COLLATE */ |
| #ifdef USE_LOCALE_NUMERIC |
| Safefree(curnum); |
| if (! (curnum = |
| setlocale(LC_NUMERIC, |
| (!done && (lang || PerlEnv_getenv("LC_NUMERIC"))) |
| ? "" : NULL))) |
| setlocale_failure = TRUE; |
| else |
| curnum = savepv(curnum); |
| #endif /* USE_LOCALE_NUMERIC */ |
| } |
| |
| #endif /* LC_ALL */ |
| |
| #endif /* !LOCALE_ENVIRON_REQUIRED */ |
| |
| #ifdef LC_ALL |
| if (! setlocale(LC_ALL, "")) |
| setlocale_failure = TRUE; |
| #endif /* LC_ALL */ |
| |
| if (!setlocale_failure) { |
| #ifdef USE_LOCALE_CTYPE |
| Safefree(curctype); |
| if (! (curctype = setlocale(LC_CTYPE, ""))) |
| setlocale_failure = TRUE; |
| else |
| curctype = savepv(curctype); |
| #endif /* USE_LOCALE_CTYPE */ |
| #ifdef USE_LOCALE_COLLATE |
| Safefree(curcoll); |
| if (! (curcoll = setlocale(LC_COLLATE, ""))) |
| setlocale_failure = TRUE; |
| else |
| curcoll = savepv(curcoll); |
| #endif /* USE_LOCALE_COLLATE */ |
| #ifdef USE_LOCALE_NUMERIC |
| Safefree(curnum); |
| if (! (curnum = setlocale(LC_NUMERIC, ""))) |
| setlocale_failure = TRUE; |
| else |
| curnum = savepv(curnum); |
| #endif /* USE_LOCALE_NUMERIC */ |
| } |
| |
| if (setlocale_failure) { |
| char *p; |
| const bool locwarn = (printwarn > 1 || |
| (printwarn && |
| (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)))); |
| |
| if (locwarn) { |
| #ifdef LC_ALL |
| |
| PerlIO_printf(Perl_error_log, |
| "perl: warning: Setting locale failed.\n"); |
| |
| #else /* !LC_ALL */ |
| |
| PerlIO_printf(Perl_error_log, |
| "perl: warning: Setting locale failed for the categories:\n\t"); |
| #ifdef USE_LOCALE_CTYPE |
| if (! curctype) |
| PerlIO_printf(Perl_error_log, "LC_CTYPE "); |
| #endif /* USE_LOCALE_CTYPE */ |
| #ifdef USE_LOCALE_COLLATE |
| if (! curcoll) |
| PerlIO_printf(Perl_error_log, "LC_COLLATE "); |
| #endif /* USE_LOCALE_COLLATE */ |
| #ifdef USE_LOCALE_NUMERIC |
| if (! curnum) |
| PerlIO_printf(Perl_error_log, "LC_NUMERIC "); |
| #endif /* USE_LOCALE_NUMERIC */ |
| PerlIO_printf(Perl_error_log, "\n"); |
| |
| #endif /* LC_ALL */ |
| |
| PerlIO_printf(Perl_error_log, |
| "perl: warning: Please check that your locale settings:\n"); |
| |
| #ifdef __GLIBC__ |
| PerlIO_printf(Perl_error_log, |
| "\tLANGUAGE = %c%s%c,\n", |
| language ? '"' : '(', |
| language ? language : "unset", |
| language ? '"' : ')'); |
| #endif |
| |
| PerlIO_printf(Perl_error_log, |
| "\tLC_ALL = %c%s%c,\n", |
| lc_all ? '"' : '(', |
| lc_all ? lc_all : "unset", |
| lc_all ? '"' : ')'); |
| |
| #if defined(USE_ENVIRON_ARRAY) |
| { |
| char **e; |
| for (e = environ; *e; e++) { |
| if (strnEQ(*e, "LC_", 3) |
| && strnNE(*e, "LC_ALL=", 7) |
| && (p = strchr(*e, '='))) |
| PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n", |
| (int)(p - *e), *e, p + 1); |
| } |
| } |
| #else |
| PerlIO_printf(Perl_error_log, |
| "\t(possibly more locale environment variables)\n"); |
| #endif |
| |
| PerlIO_printf(Perl_error_log, |
| "\tLANG = %c%s%c\n", |
| lang ? '"' : '(', |
| lang ? lang : "unset", |
| lang ? '"' : ')'); |
| |
| PerlIO_printf(Perl_error_log, |
| " are supported and installed on your system.\n"); |
| } |
| |
| #ifdef LC_ALL |
| |
| if (setlocale(LC_ALL, "C")) { |
| if (locwarn) |
| PerlIO_printf(Perl_error_log, |
| "perl: warning: Falling back to the standard locale (\"C\").\n"); |
| ok = 0; |
| } |
| else { |
| if (locwarn) |
| PerlIO_printf(Perl_error_log, |
| "perl: warning: Failed to fall back to the standard locale (\"C\").\n"); |
| ok = -1; |
| } |
| |
| #else /* ! LC_ALL */ |
| |
| if (0 |
| #ifdef USE_LOCALE_CTYPE |
| || !(curctype || setlocale(LC_CTYPE, "C")) |
| #endif /* USE_LOCALE_CTYPE */ |
| #ifdef USE_LOCALE_COLLATE |
| || !(curcoll || setlocale(LC_COLLATE, "C")) |
| #endif /* USE_LOCALE_COLLATE */ |
| #ifdef USE_LOCALE_NUMERIC |
| || !(curnum || setlocale(LC_NUMERIC, "C")) |
| #endif /* USE_LOCALE_NUMERIC */ |
| ) |
| { |
| if (locwarn) |
| PerlIO_printf(Perl_error_log, |
| "perl: warning: Cannot fall back to the standard locale (\"C\").\n"); |
| ok = -1; |
| } |
| |
| #endif /* ! LC_ALL */ |
| |
| #ifdef USE_LOCALE_CTYPE |
| Safefree(curctype); |
| curctype = savepv(setlocale(LC_CTYPE, NULL)); |
| #endif /* USE_LOCALE_CTYPE */ |
| #ifdef USE_LOCALE_COLLATE |
| Safefree(curcoll); |
| curcoll = savepv(setlocale(LC_COLLATE, NULL)); |
| #endif /* USE_LOCALE_COLLATE */ |
| #ifdef USE_LOCALE_NUMERIC |
| Safefree(curnum); |
| curnum = savepv(setlocale(LC_NUMERIC, NULL)); |
| #endif /* USE_LOCALE_NUMERIC */ |
| } |
| else { |
| |
| #ifdef USE_LOCALE_CTYPE |
| new_ctype(curctype); |
| #endif /* USE_LOCALE_CTYPE */ |
| |
| #ifdef USE_LOCALE_COLLATE |
| new_collate(curcoll); |
| #endif /* USE_LOCALE_COLLATE */ |
| |
| #ifdef USE_LOCALE_NUMERIC |
| new_numeric(curnum); |
| #endif /* USE_LOCALE_NUMERIC */ |
| |
| } |
| |
| #endif /* USE_LOCALE */ |
| |
| #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 = (foldEQ(codeset, STR_WITH_LEN("UTF-8")) |
| || foldEQ(codeset, STR_WITH_LEN("UTF8") )); |
| #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 = (foldEQ(lang, STR_WITH_LEN("UTF-8")) |
| || foldEQ(lang, STR_WITH_LEN("UTF8") )); |
| #ifdef USE_LOCALE_CTYPE |
| if (curctype) |
| utf8locale = (foldEQ(curctype, STR_WITH_LEN("UTF-8")) |
| || foldEQ(curctype, STR_WITH_LEN("UTF8") )); |
| #endif |
| if (lc_all) |
| utf8locale = (foldEQ(lc_all, STR_WITH_LEN("UTF-8")) |
| || foldEQ(lc_all, STR_WITH_LEN("UTF8") )); |
| } |
| #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 |
| |
| #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 */ |
| 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 */ |
| |
| /* |
| * Local variables: |
| * c-indentation-style: bsd |
| * c-basic-offset: 4 |
| * indent-tabs-mode: t |
| * End: |
| * |
| * ex: set ts=8 sts=4 sw=4 noet: |
| */ |