[perl5.git] / locale.c

/*    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!
 */

/* 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_LOCALE
#  include <locale.h>
#endif

#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 unspecificed 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)
	      Perl_croak(aTHX_ "strxfrm() gets absurd");
	  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 = (Perl_ibcmp(aTHX_ codeset, STR_WITH_LEN("UTF-8")) == 0 ||
 			    Perl_ibcmp(aTHX_ codeset, STR_WITH_LEN("UTF8") ) == 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 = (Perl_ibcmp(aTHX_ lang, STR_WITH_LEN("UTF-8")) == 0 ||
			         Perl_ibcmp(aTHX_ lang, STR_WITH_LEN("UTF8") ) == 0);
#ifdef USE_LOCALE_CTYPE
	      if (curctype)
		   utf8locale = (Perl_ibcmp(aTHX_ curctype, STR_WITH_LEN("UTF-8")) == 0 ||
			         Perl_ibcmp(aTHX_ curctype, STR_WITH_LEN("UTF8") ) == 0);
#endif
	      if (lc_all)
		   utf8locale = (Perl_ibcmp(aTHX_ lc_all, STR_WITH_LEN("UTF-8")) == 0 ||
			         Perl_ibcmp(aTHX_ lc_all, STR_WITH_LEN("UTF8") ) == 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

#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:
 */
Commit	Line	Data
98994639 HS	1	/* locale.c
98994639 HS	2	*
1129b882 NC	3	* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
1129b882 NC	4	* 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
98994639 HS	5	*
	6	* You may distribute under the terms of either the GNU General Public
	7	* License or the Artistic License, as specified in the README file.
	8	*
	9	*/
	10
	11	/*
	12	* A Elbereth Gilthoniel,
	13	* silivren penna míriel
	14	* o menel aglar elenath!
	15	* Na-chaered palan-díriel
	16	* o galadhremmin ennorath,
	17	* Fanuilos, le linnathon
	18	* nef aear, si nef aearon!
	19	*/
	20
166f8a29 DM	21	/* utility functions for handling locale-specific stuff like what
	22	* character represents the decimal point.
	23	*/
	24
98994639 HS	25	#include "EXTERN.h"
	26	#define PERL_IN_LOCALE_C
	27	#include "perl.h"
	28
	29	#ifdef I_LOCALE
	30	# include <locale.h>
	31	#endif
	32
b310b053 JH	33	#ifdef I_LANGINFO
	34	# include <langinfo.h>
	35	#endif
	36
a4af207c JH	37	#include "reentr.h"
a4af207c JH	38
27da23d5	39	#if defined(USE_LOCALE_NUMERIC) \|\| defined(USE_LOCALE_COLLATE)
98994639 HS	40	/*
	41	* Standardize the locale name from a string returned by 'setlocale'.
	42	*
	43	* The standard return value of setlocale() is either
	44	* (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
	45	* (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
	46	* (the space-separated values represent the various sublocales,
	47	* in some unspecificed order)
	48	*
	49	* In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
	50	* which is harmful for further use of the string in setlocale().
	51	*
	52	*/
	53	STATIC char *
	54	S_stdize_locale(pTHX_ char *locs)
	55	{
7452cf6a	56	const char * const s = strchr(locs, '=');
98994639 HS	57	bool okay = TRUE;
98994639 HS	58
7918f24d NC	59	PERL_ARGS_ASSERT_STDIZE_LOCALE;
7918f24d NC	60
8772537c AL	61	if (s) {
8772537c AL	62	const char * const t = strchr(s, '.');
98994639	63	okay = FALSE;
8772537c AL	64	if (t) {
	65	const char * const u = strchr(t, '\n');
	66	if (u && (u[1] == 0)) {
	67	const STRLEN len = u - s;
	68	Move(s + 1, locs, len, char);
	69	locs[len] = 0;
	70	okay = TRUE;
98994639 HS	71	}
	72	}
	73	}
	74
	75	if (!okay)
	76	Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
	77
	78	return locs;
	79	}
27da23d5	80	#endif
98994639 HS	81
	82	void
	83	Perl_set_numeric_radix(pTHX)
	84	{
	85	#ifdef USE_LOCALE_NUMERIC
97aff369	86	dVAR;
98994639	87	# ifdef HAS_LOCALECONV
7452cf6a	88	const struct lconv* const lc = localeconv();
98994639	89
98994639 HS	90	if (lc && lc->decimal_point) {
	91	if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
	92	SvREFCNT_dec(PL_numeric_radix_sv);
a0714e2c	93	PL_numeric_radix_sv = NULL;
98994639 HS	94	}
	95	else {
	96	if (PL_numeric_radix_sv)
	97	sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
	98	else
	99	PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
	100	}
	101	}
	102	else
a0714e2c	103	PL_numeric_radix_sv = NULL;
98994639 HS	104	# endif /* HAS_LOCALECONV */
	105	#endif /* USE_LOCALE_NUMERIC */
	106	}
	107
	108	/*
	109	* Set up for a new numeric locale.
	110	*/
	111	void
8772537c	112	Perl_new_numeric(pTHX_ const char *newnum)
98994639 HS	113	{
98994639 HS	114	#ifdef USE_LOCALE_NUMERIC
97aff369	115	dVAR;
98994639 HS	116
98994639 HS	117	if (! newnum) {
43c5f42d NC	118	Safefree(PL_numeric_name);
43c5f42d NC	119	PL_numeric_name = NULL;
98994639 HS	120	PL_numeric_standard = TRUE;
	121	PL_numeric_local = TRUE;
	122	return;
	123	}
	124
	125	if (! PL_numeric_name \|\| strNE(PL_numeric_name, newnum)) {
	126	Safefree(PL_numeric_name);
	127	PL_numeric_name = stdize_locale(savepv(newnum));
770526c1 NC	128	PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0')
770526c1 NC	129	\|\| strEQ(newnum, "POSIX"));
98994639 HS	130	PL_numeric_local = TRUE;
	131	set_numeric_radix();
	132	}
	133
	134	#endif /* USE_LOCALE_NUMERIC */
	135	}
	136
	137	void
	138	Perl_set_numeric_standard(pTHX)
	139	{
	140	#ifdef USE_LOCALE_NUMERIC
97aff369	141	dVAR;
98994639 HS	142
	143	if (! PL_numeric_standard) {
	144	setlocale(LC_NUMERIC, "C");
	145	PL_numeric_standard = TRUE;
	146	PL_numeric_local = FALSE;
	147	set_numeric_radix();
	148	}
	149
	150	#endif /* USE_LOCALE_NUMERIC */
	151	}
	152
	153	void
	154	Perl_set_numeric_local(pTHX)
	155	{
	156	#ifdef USE_LOCALE_NUMERIC
97aff369	157	dVAR;
98994639 HS	158
	159	if (! PL_numeric_local) {
	160	setlocale(LC_NUMERIC, PL_numeric_name);
	161	PL_numeric_standard = FALSE;
	162	PL_numeric_local = TRUE;
	163	set_numeric_radix();
	164	}
	165
	166	#endif /* USE_LOCALE_NUMERIC */
	167	}
	168
	169	/*
	170	* Set up for a new ctype locale.
	171	*/
	172	void
8772537c	173	Perl_new_ctype(pTHX_ const char *newctype)
98994639 HS	174	{
98994639 HS	175	#ifdef USE_LOCALE_CTYPE
27da23d5	176	dVAR;
98994639 HS	177	int i;
98994639 HS	178
7918f24d NC	179	PERL_ARGS_ASSERT_NEW_CTYPE;
7918f24d NC	180
98994639 HS	181	for (i = 0; i < 256; i++) {
	182	if (isUPPER_LC(i))
	183	PL_fold_locale[i] = toLOWER_LC(i);
	184	else if (isLOWER_LC(i))
	185	PL_fold_locale[i] = toUPPER_LC(i);
	186	else
	187	PL_fold_locale[i] = i;
	188	}
	189
	190	#endif /* USE_LOCALE_CTYPE */
7918f24d	191	PERL_ARGS_ASSERT_NEW_CTYPE;
8772537c	192	PERL_UNUSED_ARG(newctype);
96a5add6	193	PERL_UNUSED_CONTEXT;
98994639 HS	194	}
	195
	196	/*
	197	* Set up for a new collation locale.
	198	*/
	199	void
8772537c	200	Perl_new_collate(pTHX_ const char *newcoll)
98994639 HS	201	{
98994639 HS	202	#ifdef USE_LOCALE_COLLATE
97aff369	203	dVAR;
98994639 HS	204
	205	if (! newcoll) {
	206	if (PL_collation_name) {
	207	++PL_collation_ix;
	208	Safefree(PL_collation_name);
	209	PL_collation_name = NULL;
	210	}
	211	PL_collation_standard = TRUE;
	212	PL_collxfrm_base = 0;
	213	PL_collxfrm_mult = 2;
	214	return;
	215	}
	216
	217	if (! PL_collation_name \|\| strNE(PL_collation_name, newcoll)) {
	218	++PL_collation_ix;
	219	Safefree(PL_collation_name);
	220	PL_collation_name = stdize_locale(savepv(newcoll));
770526c1 NC	221	PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0')
770526c1 NC	222	\|\| strEQ(newcoll, "POSIX"));
98994639 HS	223
	224	{
	225	/* 2: at most so many chars ('a', 'b'). */
	226	/* 50: surely no system expands a char more. */
	227	#define XFRMBUFSIZE (2 * 50)
	228	char xbuf[XFRMBUFSIZE];
8772537c AL	229	const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
	230	const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
	231	const SSize_t mult = fb - fa;
98994639 HS	232	if (mult < 1)
98994639 HS	233	Perl_croak(aTHX_ "strxfrm() gets absurd");
eb160463	234	PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
98994639 HS	235	PL_collxfrm_mult = mult;
	236	}
	237	}
	238
	239	#endif /* USE_LOCALE_COLLATE */
	240	}
	241
	242	/*
	243	* Initialize locale awareness.
	244	*/
	245	int
	246	Perl_init_i18nl10n(pTHX_ int printwarn)
	247	{
	248	int ok = 1;
	249	/* returns
	250	* 1 = set ok or not applicable,
	251	* 0 = fallback to C locale,
	252	* -1 = fallback to C locale failed
	253	*/
	254
	255	#if defined(USE_LOCALE)
97aff369	256	dVAR;
98994639 HS	257
	258	#ifdef USE_LOCALE_CTYPE
	259	char *curctype = NULL;
	260	#endif /* USE_LOCALE_CTYPE */
	261	#ifdef USE_LOCALE_COLLATE
	262	char *curcoll = NULL;
	263	#endif /* USE_LOCALE_COLLATE */
	264	#ifdef USE_LOCALE_NUMERIC
	265	char *curnum = NULL;
	266	#endif /* USE_LOCALE_NUMERIC */
	267	#ifdef __GLIBC__
7452cf6a	268	char * const language = PerlEnv_getenv("LANGUAGE");
98994639	269	#endif
7452cf6a AL	270	char * const lc_all = PerlEnv_getenv("LC_ALL");
7452cf6a AL	271	char * const lang = PerlEnv_getenv("LANG");
98994639 HS	272	bool setlocale_failure = FALSE;
	273
	274	#ifdef LOCALE_ENVIRON_REQUIRED
	275
	276	/*
	277	* Ultrix setlocale(..., "") fails if there are no environment
	278	* variables from which to get a locale name.
	279	*/
	280
	281	bool done = FALSE;
	282
	283	#ifdef LC_ALL
	284	if (lang) {
	285	if (setlocale(LC_ALL, ""))
	286	done = TRUE;
	287	else
	288	setlocale_failure = TRUE;
	289	}
	290	if (!setlocale_failure) {
	291	#ifdef USE_LOCALE_CTYPE
56279a21	292	Safefree(curctype);
98994639 HS	293	if (! (curctype =
	294	setlocale(LC_CTYPE,
	295	(!done && (lang \|\| PerlEnv_getenv("LC_CTYPE")))
bd61b366	296	? "" : NULL)))
98994639 HS	297	setlocale_failure = TRUE;
	298	else
	299	curctype = savepv(curctype);
	300	#endif /* USE_LOCALE_CTYPE */
	301	#ifdef USE_LOCALE_COLLATE
56279a21	302	Safefree(curcoll);
98994639 HS	303	if (! (curcoll =
	304	setlocale(LC_COLLATE,
	305	(!done && (lang \|\| PerlEnv_getenv("LC_COLLATE")))
bd61b366	306	? "" : NULL)))
98994639 HS	307	setlocale_failure = TRUE;
	308	else
	309	curcoll = savepv(curcoll);
	310	#endif /* USE_LOCALE_COLLATE */
	311	#ifdef USE_LOCALE_NUMERIC
56279a21	312	Safefree(curnum);
98994639 HS	313	if (! (curnum =
	314	setlocale(LC_NUMERIC,
	315	(!done && (lang \|\| PerlEnv_getenv("LC_NUMERIC")))
bd61b366	316	? "" : NULL)))
98994639 HS	317	setlocale_failure = TRUE;
	318	else
	319	curnum = savepv(curnum);
	320	#endif /* USE_LOCALE_NUMERIC */
	321	}
	322
	323	#endif /* LC_ALL */
	324
	325	#endif /* !LOCALE_ENVIRON_REQUIRED */
	326
	327	#ifdef LC_ALL
	328	if (! setlocale(LC_ALL, ""))
	329	setlocale_failure = TRUE;
	330	#endif /* LC_ALL */
	331
	332	if (!setlocale_failure) {
	333	#ifdef USE_LOCALE_CTYPE
6cb43dbf	334	Safefree(curctype);
98994639 HS	335	if (! (curctype = setlocale(LC_CTYPE, "")))
	336	setlocale_failure = TRUE;
	337	else
	338	curctype = savepv(curctype);
	339	#endif /* USE_LOCALE_CTYPE */
	340	#ifdef USE_LOCALE_COLLATE
6cb43dbf	341	Safefree(curcoll);
98994639 HS	342	if (! (curcoll = setlocale(LC_COLLATE, "")))
	343	setlocale_failure = TRUE;
	344	else
	345	curcoll = savepv(curcoll);
	346	#endif /* USE_LOCALE_COLLATE */
	347	#ifdef USE_LOCALE_NUMERIC
6cb43dbf	348	Safefree(curnum);
98994639 HS	349	if (! (curnum = setlocale(LC_NUMERIC, "")))
	350	setlocale_failure = TRUE;
	351	else
	352	curnum = savepv(curnum);
	353	#endif /* USE_LOCALE_NUMERIC */
	354	}
	355
	356	if (setlocale_failure) {
	357	char *p;
0bd48802	358	const bool locwarn = (printwarn > 1 \|\|
98994639 HS	359	(printwarn &&
	360	(!(p = PerlEnv_getenv("PERL_BADLANG")) \|\| atoi(p))));
	361
	362	if (locwarn) {
	363	#ifdef LC_ALL
	364
	365	PerlIO_printf(Perl_error_log,
	366	"perl: warning: Setting locale failed.\n");
	367
	368	#else /* !LC_ALL */
	369
	370	PerlIO_printf(Perl_error_log,
	371	"perl: warning: Setting locale failed for the categories:\n\t");
	372	#ifdef USE_LOCALE_CTYPE
	373	if (! curctype)
	374	PerlIO_printf(Perl_error_log, "LC_CTYPE ");
	375	#endif /* USE_LOCALE_CTYPE */
	376	#ifdef USE_LOCALE_COLLATE
	377	if (! curcoll)
	378	PerlIO_printf(Perl_error_log, "LC_COLLATE ");
	379	#endif /* USE_LOCALE_COLLATE */
	380	#ifdef USE_LOCALE_NUMERIC
	381	if (! curnum)
	382	PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
	383	#endif /* USE_LOCALE_NUMERIC */
	384	PerlIO_printf(Perl_error_log, "\n");
	385
	386	#endif /* LC_ALL */
	387
	388	PerlIO_printf(Perl_error_log,
	389	"perl: warning: Please check that your locale settings:\n");
	390
	391	#ifdef __GLIBC__
	392	PerlIO_printf(Perl_error_log,
	393	"\tLANGUAGE = %c%s%c,\n",
	394	language ? '"' : '(',
	395	language ? language : "unset",
	396	language ? '"' : ')');
	397	#endif
	398
	399	PerlIO_printf(Perl_error_log,
	400	"\tLC_ALL = %c%s%c,\n",
	401	lc_all ? '"' : '(',
	402	lc_all ? lc_all : "unset",
	403	lc_all ? '"' : ')');
	404
	405	#if defined(USE_ENVIRON_ARRAY)
	406	{
	407	char **e;
	408	for (e = environ; *e; e++) {
	409	if (strnEQ(*e, "LC_", 3)
	410	&& strnNE(*e, "LC_ALL=", 7)
	411	&& (p = strchr(*e, '=')))
	412	PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
	413	(int)(p - e), e, p + 1);
	414	}
	415	}
	416	#else
	417	PerlIO_printf(Perl_error_log,
	418	"\t(possibly more locale environment variables)\n");
	419	#endif
	420
	421	PerlIO_printf(Perl_error_log,
	422	"\tLANG = %c%s%c\n",
423	lang ? '"' : '(',
424	lang ? lang : "unset",
425	lang ? '"' : ')');
426
427	PerlIO_printf(Perl_error_log,
428	" are supported and installed on your system.\n");
429	}
430
431	#ifdef LC_ALL
432
433	if (setlocale(LC_ALL, "C")) {
434	if (locwarn)
435	PerlIO_printf(Perl_error_log,
436	"perl: warning: Falling back to the standard locale (\"C\").\n");
437	ok = 0;
438	}
439	else {
440	if (locwarn)
441	PerlIO_printf(Perl_error_log,
442	"perl: warning: Failed to fall back to the standard locale (\"C\").\n");
443	ok = -1;
444	}
445
446	#else /* ! LC_ALL */
447
448	if (0
449	#ifdef USE_LOCALE_CTYPE
450	\|\| !(curctype \|\| setlocale(LC_CTYPE, "C"))
451	#endif /* USE_LOCALE_CTYPE */
452	#ifdef USE_LOCALE_COLLATE
453	\|\| !(curcoll \|\| setlocale(LC_COLLATE, "C"))
454	#endif /* USE_LOCALE_COLLATE */
455	#ifdef USE_LOCALE_NUMERIC
456	\|\| !(curnum \|\| setlocale(LC_NUMERIC, "C"))
457	#endif /* USE_LOCALE_NUMERIC */
458	)
459	{
460	if (locwarn)
461	PerlIO_printf(Perl_error_log,
462	"perl: warning: Cannot fall back to the standard locale (\"C\").\n");
463	ok = -1;
464	}
465
466	#endif /* ! LC_ALL */
467
468	#ifdef USE_LOCALE_CTYPE
56279a21	469	Safefree(curctype);
bd61b366	470	curctype = savepv(setlocale(LC_CTYPE, NULL));
98994639 HS	471	#endif /* USE_LOCALE_CTYPE */
98994639 HS	472	#ifdef USE_LOCALE_COLLATE
56279a21	473	Safefree(curcoll);
bd61b366	474	curcoll = savepv(setlocale(LC_COLLATE, NULL));
98994639 HS	475	#endif /* USE_LOCALE_COLLATE */
98994639 HS	476	#ifdef USE_LOCALE_NUMERIC
56279a21	477	Safefree(curnum);
bd61b366	478	curnum = savepv(setlocale(LC_NUMERIC, NULL));
98994639 HS	479	#endif /* USE_LOCALE_NUMERIC */
	480	}
	481	else {
	482
	483	#ifdef USE_LOCALE_CTYPE
	484	new_ctype(curctype);
	485	#endif /* USE_LOCALE_CTYPE */
	486
	487	#ifdef USE_LOCALE_COLLATE
	488	new_collate(curcoll);
	489	#endif /* USE_LOCALE_COLLATE */
	490
	491	#ifdef USE_LOCALE_NUMERIC
	492	new_numeric(curnum);
	493	#endif /* USE_LOCALE_NUMERIC */
b310b053	494
98994639 HS	495	}
	496
	497	#endif /* USE_LOCALE */
	498
ec71e770	499	#ifdef USE_PERLIO
b310b053	500	{
fde18df1	501	/* Set PL_utf8locale to TRUE if using PerlIO _and_
ec71e770	502	any of the following are true:
085a54d9	503	- nl_langinfo(CODESET) contains /^utf-?8/i
61de9fb5	504	- $ENV{LC_ALL} contains /^utf-?8/i
085a54d9	505	- $ENV{LC_CTYPE} contains /^utf-?8/i
61de9fb5 JH	506	- $ENV{LANG} contains /^utf-?8/i
	507	The LC_ALL, LC_CTYPE, LANG obey the usual override
	508	hierarchy of locale environment variables. (LANGUAGE
	509	affects only LC_MESSAGES only under glibc.) (If present,
	510	it overrides LC_MESSAGES for GNU gettext, and it also
	511	can have more than one locale, separated by spaces,
	512	in case you need to know.)
8aa8f774	513	If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE})
a05d7ebb	514	are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer
fde18df1	515	on STDIN, STDOUT, STDERR, _and_ the default open discipline.
085a54d9	516	*/
fde18df1	517	bool utf8locale = FALSE;
b310b053 JH	518	char *codeset = NULL;
	519	#if defined(HAS_NL_LANGINFO) && defined(CODESET)
	520	codeset = nl_langinfo(CODESET);
	521	#endif
61de9fb5	522	if (codeset)
89529cee GA	523	utf8locale = (Perl_ibcmp(aTHX_ codeset, STR_WITH_LEN("UTF-8")) == 0 \|\|
89529cee GA	524	Perl_ibcmp(aTHX_ codeset, STR_WITH_LEN("UTF8") ) == 0);
077a72a9	525	#if defined(USE_LOCALE)
61de9fb5 JH	526	else { /* nl_langinfo(CODESET) is supposed to correctly
	527	* interpret the locale environment variables,
	528	* but just in case it fails, let's do this manually. */
	529	if (lang)
89529cee GA	530	utf8locale = (Perl_ibcmp(aTHX_ lang, STR_WITH_LEN("UTF-8")) == 0 \|\|
89529cee GA	531	Perl_ibcmp(aTHX_ lang, STR_WITH_LEN("UTF8") ) == 0);
b310b053	532	#ifdef USE_LOCALE_CTYPE
61de9fb5	533	if (curctype)
89529cee GA	534	utf8locale = (Perl_ibcmp(aTHX_ curctype, STR_WITH_LEN("UTF-8")) == 0 \|\|
89529cee GA	535	Perl_ibcmp(aTHX_ curctype, STR_WITH_LEN("UTF8") ) == 0);
b310b053	536	#endif
61de9fb5	537	if (lc_all)
89529cee GA	538	utf8locale = (Perl_ibcmp(aTHX_ lc_all, STR_WITH_LEN("UTF-8")) == 0 \|\|
89529cee GA	539	Perl_ibcmp(aTHX_ lc_all, STR_WITH_LEN("UTF8") ) == 0);
61de9fb5	540	}
fde18df1 JH	541	#endif /* USE_LOCALE */
	542	if (utf8locale)
	543	PL_utf8locale = TRUE;
	544	}
a05d7ebb	545	/* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
fde18df1 JH	546	This is an alternative to using the -C command line switch
	547	(the -C if present will override this). */
	548	{
dd374669	549	const char *p = PerlEnv_getenv("PERL_UNICODE");
a05d7ebb	550	PL_unicode = p ? parse_unicode_opts(&p) : 0;
5a22a2bb NC	551	if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
5a22a2bb NC	552	PL_utf8cache = -1;
b310b053	553	}
ec71e770	554	#endif
b310b053	555
98994639	556	#ifdef USE_LOCALE_CTYPE
43c5f42d	557	Safefree(curctype);
98994639 HS	558	#endif /* USE_LOCALE_CTYPE */
98994639 HS	559	#ifdef USE_LOCALE_COLLATE
43c5f42d	560	Safefree(curcoll);
98994639 HS	561	#endif /* USE_LOCALE_COLLATE */
98994639 HS	562	#ifdef USE_LOCALE_NUMERIC
43c5f42d	563	Safefree(curnum);
98994639 HS	564	#endif /* USE_LOCALE_NUMERIC */
	565	return ok;
	566	}
	567
98994639 HS	568	#ifdef USE_LOCALE_COLLATE
	569
	570	/*
	571	* mem_collxfrm() is a bit like strxfrm() but with two important
	572	* differences. First, it handles embedded NULs. Second, it allocates
	573	* a bit more memory than needed for the transformed data itself.
	574	* The real transformed data begins at offset sizeof(collationix).
	575	* Please see sv_collxfrm() to see how this is used.
	576	*/
166f8a29	577
98994639 HS	578	char *
	579	Perl_mem_collxfrm(pTHX_ const char s, STRLEN len, STRLEN xlen)
	580	{
97aff369	581	dVAR;
98994639 HS	582	char *xbuf;
	583	STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
	584
7918f24d NC	585	PERL_ARGS_ASSERT_MEM_COLLXFRM;
7918f24d NC	586
98994639 HS	587	/* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
	588	/* the +1 is for the terminating NUL. */
	589
	590	xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
a02a5408	591	Newx(xbuf, xAlloc, char);
98994639 HS	592	if (! xbuf)
	593	goto bad;
	594
	595	(U32)xbuf = PL_collation_ix;
	596	xout = sizeof(PL_collation_ix);
	597	for (xin = 0; xin < len; ) {
224e8ef5	598	Size_t xused;
98994639 HS	599
	600	for (;;) {
	601	xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
224e8ef5	602	if (xused >= PERL_INT_MAX)
98994639	603	goto bad;
eb160463	604	if ((STRLEN)xused < xAlloc - xout)
98994639 HS	605	break;
	606	xAlloc = (2 * xAlloc) + 1;
	607	Renew(xbuf, xAlloc, char);
	608	if (! xbuf)
	609	goto bad;
	610	}
	611
	612	xin += strlen(s + xin) + 1;
	613	xout += xused;
	614
	615	/* Embedded NULs are understood but silently skipped
	616	* because they make no sense in locale collation. */
	617	}
	618
	619	xbuf[xout] = '\0';
	620	*xlen = xout - sizeof(PL_collation_ix);
	621	return xbuf;
	622
	623	bad:
	624	Safefree(xbuf);
	625	*xlen = 0;
	626	return NULL;
	627	}
	628
	629	#endif /* USE_LOCALE_COLLATE */
	630
66610fdd RGS	631	/*
	632	* Local variables:
	633	* c-indentation-style: bsd
	634	* c-basic-offset: 4
	635	* indent-tabs-mode: t
	636	* End:
	637	*
37442d52 RGS	638	* ex: set ts=8 sts=4 sw=4 noet:
37442d52 RGS	639	*/