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https://github.com/Perl/perl5.git
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14d04a3346
This updates the editor hints in our files for Emacs and vim to request that tabs be inserted as spaces.
639 lines
15 KiB
C
639 lines
15 KiB
C
/* locale.c
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*
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* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
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* 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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*/
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/*
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* A Elbereth Gilthoniel,
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* silivren penna míriel
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* o menel aglar elenath!
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* Na-chaered palan-díriel
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* o galadhremmin ennorath,
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* Fanuilos, le linnathon
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* nef aear, si nef aearon!
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*
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* [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"]
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*/
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/* utility functions for handling locale-specific stuff like what
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* character represents the decimal point.
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*/
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#include "EXTERN.h"
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#define PERL_IN_LOCALE_C
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#include "perl.h"
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#ifdef I_LANGINFO
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# include <langinfo.h>
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#endif
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#include "reentr.h"
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#if defined(USE_LOCALE_NUMERIC) || defined(USE_LOCALE_COLLATE)
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/*
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* Standardize the locale name from a string returned by 'setlocale'.
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*
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* The standard return value of setlocale() is either
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* (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
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* (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
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* (the space-separated values represent the various sublocales,
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* in some unspecified order)
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*
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* In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
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* which is harmful for further use of the string in setlocale().
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*
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*/
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STATIC char *
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S_stdize_locale(pTHX_ char *locs)
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{
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const char * const s = strchr(locs, '=');
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bool okay = TRUE;
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PERL_ARGS_ASSERT_STDIZE_LOCALE;
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if (s) {
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const char * const t = strchr(s, '.');
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okay = FALSE;
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if (t) {
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const char * const u = strchr(t, '\n');
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if (u && (u[1] == 0)) {
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const STRLEN len = u - s;
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Move(s + 1, locs, len, char);
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locs[len] = 0;
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okay = TRUE;
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}
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}
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}
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if (!okay)
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Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
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return locs;
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}
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#endif
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void
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Perl_set_numeric_radix(pTHX)
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{
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#ifdef USE_LOCALE_NUMERIC
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dVAR;
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# ifdef HAS_LOCALECONV
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const struct lconv* const lc = localeconv();
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if (lc && lc->decimal_point) {
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if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
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SvREFCNT_dec(PL_numeric_radix_sv);
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PL_numeric_radix_sv = NULL;
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}
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else {
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if (PL_numeric_radix_sv)
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sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
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else
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PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
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}
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}
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else
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PL_numeric_radix_sv = NULL;
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# endif /* HAS_LOCALECONV */
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#endif /* USE_LOCALE_NUMERIC */
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}
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/*
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* Set up for a new numeric locale.
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*/
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void
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Perl_new_numeric(pTHX_ const char *newnum)
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{
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#ifdef USE_LOCALE_NUMERIC
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dVAR;
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if (! newnum) {
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Safefree(PL_numeric_name);
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PL_numeric_name = NULL;
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PL_numeric_standard = TRUE;
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PL_numeric_local = TRUE;
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return;
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}
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if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) {
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Safefree(PL_numeric_name);
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PL_numeric_name = stdize_locale(savepv(newnum));
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PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0')
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|| strEQ(newnum, "POSIX"));
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PL_numeric_local = TRUE;
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set_numeric_radix();
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}
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#endif /* USE_LOCALE_NUMERIC */
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}
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void
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Perl_set_numeric_standard(pTHX)
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{
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#ifdef USE_LOCALE_NUMERIC
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dVAR;
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if (! PL_numeric_standard) {
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setlocale(LC_NUMERIC, "C");
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PL_numeric_standard = TRUE;
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PL_numeric_local = FALSE;
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set_numeric_radix();
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}
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#endif /* USE_LOCALE_NUMERIC */
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}
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void
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Perl_set_numeric_local(pTHX)
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{
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#ifdef USE_LOCALE_NUMERIC
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dVAR;
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if (! PL_numeric_local) {
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setlocale(LC_NUMERIC, PL_numeric_name);
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PL_numeric_standard = FALSE;
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PL_numeric_local = TRUE;
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set_numeric_radix();
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}
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#endif /* USE_LOCALE_NUMERIC */
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}
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/*
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* Set up for a new ctype locale.
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*/
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void
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Perl_new_ctype(pTHX_ const char *newctype)
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{
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#ifdef USE_LOCALE_CTYPE
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dVAR;
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int i;
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PERL_ARGS_ASSERT_NEW_CTYPE;
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for (i = 0; i < 256; i++) {
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if (isUPPER_LC(i))
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PL_fold_locale[i] = toLOWER_LC(i);
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else if (isLOWER_LC(i))
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PL_fold_locale[i] = toUPPER_LC(i);
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else
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PL_fold_locale[i] = i;
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}
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#endif /* USE_LOCALE_CTYPE */
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PERL_ARGS_ASSERT_NEW_CTYPE;
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PERL_UNUSED_ARG(newctype);
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PERL_UNUSED_CONTEXT;
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}
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/*
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* Set up for a new collation locale.
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*/
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void
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Perl_new_collate(pTHX_ const char *newcoll)
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{
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#ifdef USE_LOCALE_COLLATE
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dVAR;
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if (! newcoll) {
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if (PL_collation_name) {
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++PL_collation_ix;
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Safefree(PL_collation_name);
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PL_collation_name = NULL;
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}
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PL_collation_standard = TRUE;
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PL_collxfrm_base = 0;
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PL_collxfrm_mult = 2;
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return;
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}
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if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
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++PL_collation_ix;
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Safefree(PL_collation_name);
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PL_collation_name = stdize_locale(savepv(newcoll));
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PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0')
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|| strEQ(newcoll, "POSIX"));
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{
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/* 2: at most so many chars ('a', 'b'). */
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/* 50: surely no system expands a char more. */
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#define XFRMBUFSIZE (2 * 50)
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char xbuf[XFRMBUFSIZE];
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const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
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const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
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const SSize_t mult = fb - fa;
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if (mult < 1 && !(fa == 0 && fb == 0))
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Perl_croak(aTHX_ "panic: strxfrm() gets absurd - a => %"UVuf", ab => %"UVuf,
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(UV) fa, (UV) fb);
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PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
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PL_collxfrm_mult = mult;
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}
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}
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#endif /* USE_LOCALE_COLLATE */
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}
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/*
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* Initialize locale awareness.
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*/
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int
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Perl_init_i18nl10n(pTHX_ int printwarn)
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{
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int ok = 1;
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/* returns
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* 1 = set ok or not applicable,
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* 0 = fallback to C locale,
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* -1 = fallback to C locale failed
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*/
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#if defined(USE_LOCALE)
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dVAR;
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#ifdef USE_LOCALE_CTYPE
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char *curctype = NULL;
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#endif /* USE_LOCALE_CTYPE */
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#ifdef USE_LOCALE_COLLATE
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char *curcoll = NULL;
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#endif /* USE_LOCALE_COLLATE */
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#ifdef USE_LOCALE_NUMERIC
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char *curnum = NULL;
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#endif /* USE_LOCALE_NUMERIC */
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#ifdef __GLIBC__
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char * const language = PerlEnv_getenv("LANGUAGE");
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#endif
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char * const lc_all = PerlEnv_getenv("LC_ALL");
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char * const lang = PerlEnv_getenv("LANG");
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bool setlocale_failure = FALSE;
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#ifdef LOCALE_ENVIRON_REQUIRED
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/*
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* Ultrix setlocale(..., "") fails if there are no environment
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* variables from which to get a locale name.
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*/
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bool done = FALSE;
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#ifdef LC_ALL
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if (lang) {
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if (setlocale(LC_ALL, ""))
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done = TRUE;
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else
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setlocale_failure = TRUE;
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}
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if (!setlocale_failure) {
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#ifdef USE_LOCALE_CTYPE
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Safefree(curctype);
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if (! (curctype =
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setlocale(LC_CTYPE,
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(!done && (lang || PerlEnv_getenv("LC_CTYPE")))
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? "" : NULL)))
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setlocale_failure = TRUE;
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else
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curctype = savepv(curctype);
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#endif /* USE_LOCALE_CTYPE */
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#ifdef USE_LOCALE_COLLATE
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Safefree(curcoll);
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if (! (curcoll =
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setlocale(LC_COLLATE,
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(!done && (lang || PerlEnv_getenv("LC_COLLATE")))
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? "" : NULL)))
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setlocale_failure = TRUE;
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else
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curcoll = savepv(curcoll);
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#endif /* USE_LOCALE_COLLATE */
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#ifdef USE_LOCALE_NUMERIC
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Safefree(curnum);
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if (! (curnum =
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setlocale(LC_NUMERIC,
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(!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
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? "" : NULL)))
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setlocale_failure = TRUE;
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else
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curnum = savepv(curnum);
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#endif /* USE_LOCALE_NUMERIC */
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}
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#endif /* LC_ALL */
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#endif /* !LOCALE_ENVIRON_REQUIRED */
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#ifdef LC_ALL
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if (! setlocale(LC_ALL, ""))
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setlocale_failure = TRUE;
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#endif /* LC_ALL */
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if (!setlocale_failure) {
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#ifdef USE_LOCALE_CTYPE
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Safefree(curctype);
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if (! (curctype = setlocale(LC_CTYPE, "")))
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setlocale_failure = TRUE;
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else
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curctype = savepv(curctype);
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#endif /* USE_LOCALE_CTYPE */
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#ifdef USE_LOCALE_COLLATE
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Safefree(curcoll);
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if (! (curcoll = setlocale(LC_COLLATE, "")))
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setlocale_failure = TRUE;
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else
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curcoll = savepv(curcoll);
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#endif /* USE_LOCALE_COLLATE */
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#ifdef USE_LOCALE_NUMERIC
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Safefree(curnum);
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if (! (curnum = setlocale(LC_NUMERIC, "")))
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setlocale_failure = TRUE;
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else
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curnum = savepv(curnum);
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#endif /* USE_LOCALE_NUMERIC */
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}
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if (setlocale_failure) {
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char *p;
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const bool locwarn = (printwarn > 1 ||
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(printwarn &&
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(!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p))));
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if (locwarn) {
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#ifdef LC_ALL
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PerlIO_printf(Perl_error_log,
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"perl: warning: Setting locale failed.\n");
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#else /* !LC_ALL */
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PerlIO_printf(Perl_error_log,
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"perl: warning: Setting locale failed for the categories:\n\t");
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#ifdef USE_LOCALE_CTYPE
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if (! curctype)
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PerlIO_printf(Perl_error_log, "LC_CTYPE ");
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#endif /* USE_LOCALE_CTYPE */
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#ifdef USE_LOCALE_COLLATE
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if (! curcoll)
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PerlIO_printf(Perl_error_log, "LC_COLLATE ");
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#endif /* USE_LOCALE_COLLATE */
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#ifdef USE_LOCALE_NUMERIC
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if (! curnum)
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PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
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#endif /* USE_LOCALE_NUMERIC */
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PerlIO_printf(Perl_error_log, "\n");
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#endif /* LC_ALL */
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PerlIO_printf(Perl_error_log,
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"perl: warning: Please check that your locale settings:\n");
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#ifdef __GLIBC__
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PerlIO_printf(Perl_error_log,
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"\tLANGUAGE = %c%s%c,\n",
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language ? '"' : '(',
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language ? language : "unset",
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language ? '"' : ')');
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#endif
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PerlIO_printf(Perl_error_log,
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"\tLC_ALL = %c%s%c,\n",
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lc_all ? '"' : '(',
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lc_all ? lc_all : "unset",
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lc_all ? '"' : ')');
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#if defined(USE_ENVIRON_ARRAY)
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{
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char **e;
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for (e = environ; *e; e++) {
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if (strnEQ(*e, "LC_", 3)
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&& strnNE(*e, "LC_ALL=", 7)
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&& (p = strchr(*e, '=')))
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PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
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(int)(p - *e), *e, p + 1);
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}
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}
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#else
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PerlIO_printf(Perl_error_log,
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"\t(possibly more locale environment variables)\n");
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#endif
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PerlIO_printf(Perl_error_log,
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"\tLANG = %c%s%c\n",
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lang ? '"' : '(',
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lang ? lang : "unset",
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lang ? '"' : ')');
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PerlIO_printf(Perl_error_log,
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" are supported and installed on your system.\n");
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}
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#ifdef LC_ALL
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if (setlocale(LC_ALL, "C")) {
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if (locwarn)
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PerlIO_printf(Perl_error_log,
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"perl: warning: Falling back to the standard locale (\"C\").\n");
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ok = 0;
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}
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else {
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if (locwarn)
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PerlIO_printf(Perl_error_log,
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"perl: warning: Failed to fall back to the standard locale (\"C\").\n");
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ok = -1;
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}
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#else /* ! LC_ALL */
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if (0
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#ifdef USE_LOCALE_CTYPE
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|| !(curctype || setlocale(LC_CTYPE, "C"))
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#endif /* USE_LOCALE_CTYPE */
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#ifdef USE_LOCALE_COLLATE
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|| !(curcoll || setlocale(LC_COLLATE, "C"))
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#endif /* USE_LOCALE_COLLATE */
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#ifdef USE_LOCALE_NUMERIC
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|| !(curnum || setlocale(LC_NUMERIC, "C"))
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#endif /* USE_LOCALE_NUMERIC */
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)
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{
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if (locwarn)
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PerlIO_printf(Perl_error_log,
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"perl: warning: Cannot fall back to the standard locale (\"C\").\n");
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ok = -1;
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}
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#endif /* ! LC_ALL */
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#ifdef USE_LOCALE_CTYPE
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Safefree(curctype);
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curctype = savepv(setlocale(LC_CTYPE, NULL));
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#endif /* USE_LOCALE_CTYPE */
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#ifdef USE_LOCALE_COLLATE
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Safefree(curcoll);
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curcoll = savepv(setlocale(LC_COLLATE, NULL));
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#endif /* USE_LOCALE_COLLATE */
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#ifdef USE_LOCALE_NUMERIC
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Safefree(curnum);
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curnum = savepv(setlocale(LC_NUMERIC, NULL));
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#endif /* USE_LOCALE_NUMERIC */
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}
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else {
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#ifdef USE_LOCALE_CTYPE
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new_ctype(curctype);
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#endif /* USE_LOCALE_CTYPE */
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#ifdef USE_LOCALE_COLLATE
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new_collate(curcoll);
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#endif /* USE_LOCALE_COLLATE */
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#ifdef USE_LOCALE_NUMERIC
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new_numeric(curnum);
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#endif /* USE_LOCALE_NUMERIC */
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}
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#endif /* USE_LOCALE */
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#ifdef USE_PERLIO
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{
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/* Set PL_utf8locale to TRUE if using PerlIO _and_
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any of the following are true:
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- nl_langinfo(CODESET) contains /^utf-?8/i
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- $ENV{LC_ALL} contains /^utf-?8/i
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- $ENV{LC_CTYPE} contains /^utf-?8/i
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- $ENV{LANG} contains /^utf-?8/i
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The LC_ALL, LC_CTYPE, LANG obey the usual override
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hierarchy of locale environment variables. (LANGUAGE
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affects only LC_MESSAGES only under glibc.) (If present,
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it overrides LC_MESSAGES for GNU gettext, and it also
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can have more than one locale, separated by spaces,
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in case you need to know.)
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If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE})
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are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer
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on STDIN, STDOUT, STDERR, _and_ the default open discipline.
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*/
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bool utf8locale = FALSE;
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char *codeset = NULL;
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#if defined(HAS_NL_LANGINFO) && defined(CODESET)
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codeset = nl_langinfo(CODESET);
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#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: nil
|
|
* End:
|
|
*
|
|
* ex: set ts=8 sts=4 sw=4 et:
|
|
*/
|