[perl5.git] / locale.c

/*    locale.c
 *
 *    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
 *    2000, 2001, 2002, 2003, 2005, 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)
{
    char *s;
    bool okay = TRUE;

    if ((s = strchr(locs, '='))) {
	char *t;

	okay = FALSE;
	if ((t = strchr(s, '.'))) {
	    char *u;

	    if ((u = strchr(t, '\n'))) {

		if (u[1] == 0) {
		    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
# ifdef HAS_LOCALECONV
    struct lconv* lc;

    lc = localeconv();
    if (lc && lc->decimal_point) {
	if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
	    SvREFCNT_dec(PL_numeric_radix_sv);
	    PL_numeric_radix_sv = Nullsv;
	}
	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 = Nullsv;
# endif /* HAS_LOCALECONV */
#endif /* USE_LOCALE_NUMERIC */
}

/*
 * Set up for a new numeric locale.
 */
void
Perl_new_numeric(pTHX_ char *newnum)
{
#ifdef USE_LOCALE_NUMERIC

    if (! newnum) {
	if (PL_numeric_name) {
	    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

    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

    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_ char *newctype)
{
#ifdef USE_LOCALE_CTYPE
    dVAR;
    int i;

    for (i = 0; i < 256; i++) {
	if (isUPPER_LC(i))
	    PL_fold_locale[i] = toLOWER_LC(i);
	else if (isLOWER_LC(i))
	    PL_fold_locale[i] = toUPPER_LC(i);
	else
	    PL_fold_locale[i] = i;
    }

#endif /* USE_LOCALE_CTYPE */
    (void)newctype;
}

/*
 * Set up for a new collation locale.
 */
void
Perl_new_collate(pTHX_ char *newcoll)
{
#ifdef USE_LOCALE_COLLATE

    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];
	  Size_t fa = strxfrm(xbuf, "a",  XFRMBUFSIZE);
	  Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
	  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)

#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 *language   = PerlEnv_getenv("LANGUAGE");
#endif
    char *lc_all     = PerlEnv_getenv("LC_ALL");
    char *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
	if (! (curctype =
	       setlocale(LC_CTYPE,
			 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
				    ? "" : Nullch)))
	    setlocale_failure = TRUE;
	else
	    curctype = savepv(curctype);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
	if (! (curcoll =
	       setlocale(LC_COLLATE,
			 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
				   ? "" : Nullch)))
	    setlocale_failure = TRUE;
	else
	    curcoll = savepv(curcoll);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
	if (! (curnum =
	       setlocale(LC_NUMERIC,
			 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
				  ? "" : Nullch)))
	    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
	if (! (curctype = setlocale(LC_CTYPE, "")))
	    setlocale_failure = TRUE;
	else
	    curctype = savepv(curctype);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
	if (! (curcoll = setlocale(LC_COLLATE, "")))
	    setlocale_failure = TRUE;
	else
	    curcoll = savepv(curcoll);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
	if (! (curnum = setlocale(LC_NUMERIC, "")))
	    setlocale_failure = TRUE;
	else
	    curnum = savepv(curnum);
#endif /* USE_LOCALE_NUMERIC */
    }

    if (setlocale_failure) {
	char *p;
	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
	curctype = savepv(setlocale(LC_CTYPE, Nullch));
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
	curcoll = savepv(setlocale(LC_COLLATE, Nullch));
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
	curnum = savepv(setlocale(LC_NUMERIC, Nullch));
#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 = (ibcmp(codeset,  "UTF-8", 5) == 0 ||
 			    ibcmp(codeset,  "UTF8",  4) == 0);
#if defined(USE_LOCALE)
	 else { /* nl_langinfo(CODESET) is supposed to correctly
		 * interpret the locale environment variables,
		 * but just in case it fails, let's do this manually. */ 
	      if (lang)
		   utf8locale = (ibcmp(lang,     "UTF-8", 5) == 0 ||
			         ibcmp(lang,     "UTF8",  4) == 0);
#ifdef USE_LOCALE_CTYPE
	      if (curctype)
		   utf8locale = (ibcmp(curctype,     "UTF-8", 5) == 0 ||
			         ibcmp(curctype,     "UTF8",  4) == 0);
#endif
	      if (lc_all)
		   utf8locale = (ibcmp(lc_all,   "UTF-8", 5) == 0 ||
			         ibcmp(lc_all,   "UTF8",  4) == 0);
	 }
#endif /* USE_LOCALE */
	 if (utf8locale)
	      PL_utf8locale = TRUE;
    }
    /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
       This is an alternative to using the -C command line switch
       (the -C if present will override this). */
    {
	 const char *p = PerlEnv_getenv("PERL_UNICODE");
	 PL_unicode = p ? parse_unicode_opts(&p) : 0;
    }
#endif

#ifdef USE_LOCALE_CTYPE
    if (curctype != NULL)
	Safefree(curctype);
#endif /* USE_LOCALE_CTYPE */
#ifdef USE_LOCALE_COLLATE
    if (curcoll != NULL)
	Safefree(curcoll);
#endif /* USE_LOCALE_COLLATE */
#ifdef USE_LOCALE_NUMERIC
    if (curnum != NULL)
	Safefree(curnum);
#endif /* USE_LOCALE_NUMERIC */
    return ok;
}

/* Backwards compatibility. */
int
Perl_init_i18nl14n(pTHX_ int printwarn)
{
    return init_i18nl10n(printwarn);
}

#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)
{
    char *xbuf;
    STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */

    /* 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;
    New(171, xbuf, xAlloc, char);
    if (! xbuf)
	goto bad;

    *(U32*)xbuf = PL_collation_ix;
    xout = sizeof(PL_collation_ix);
    for (xin = 0; xin < len; ) {
	SSize_t xused;

	for (;;) {
	    xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
	    if (xused == -1)
		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	*
4bb101f2	3	* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
770526c1	4	* 2000, 2001, 2002, 2003, 2005, 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	{
	56	char *s;
	57	bool okay = TRUE;
	58
	59	if ((s = strchr(locs, '='))) {
	60	char *t;
	61
	62	okay = FALSE;
	63	if ((t = strchr(s, '.'))) {
	64	char *u;
	65
	66	if ((u = strchr(t, '\n'))) {
	67
	68	if (u[1] == 0) {
	69	STRLEN len = u - s;
	70	Move(s + 1, locs, len, char);
	71	locs[len] = 0;
	72	okay = TRUE;
	73	}
	74	}
	75	}
	76	}
	77
	78	if (!okay)
	79	Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
	80
	81	return locs;
	82	}
27da23d5	83	#endif
98994639 HS	84
	85	void
	86	Perl_set_numeric_radix(pTHX)
	87	{
	88	#ifdef USE_LOCALE_NUMERIC
	89	# ifdef HAS_LOCALECONV
	90	struct lconv* lc;
	91
	92	lc = localeconv();
	93	if (lc && lc->decimal_point) {
	94	if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
	95	SvREFCNT_dec(PL_numeric_radix_sv);
	96	PL_numeric_radix_sv = Nullsv;
	97	}
	98	else {
	99	if (PL_numeric_radix_sv)
	100	sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
	101	else
	102	PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
	103	}
	104	}
	105	else
	106	PL_numeric_radix_sv = Nullsv;
	107	# endif /* HAS_LOCALECONV */
	108	#endif /* USE_LOCALE_NUMERIC */
	109	}
	110
	111	/*
	112	* Set up for a new numeric locale.
	113	*/
	114	void
	115	Perl_new_numeric(pTHX_ char *newnum)
	116	{
	117	#ifdef USE_LOCALE_NUMERIC
	118
	119	if (! newnum) {
	120	if (PL_numeric_name) {
	121	Safefree(PL_numeric_name);
	122	PL_numeric_name = NULL;
	123	}
	124	PL_numeric_standard = TRUE;
	125	PL_numeric_local = TRUE;
	126	return;
	127	}
	128
	129	if (! PL_numeric_name \|\| strNE(PL_numeric_name, newnum)) {
	130	Safefree(PL_numeric_name);
	131	PL_numeric_name = stdize_locale(savepv(newnum));
770526c1 NC	132	PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0')
770526c1 NC	133	\|\| strEQ(newnum, "POSIX"));
98994639 HS	134	PL_numeric_local = TRUE;
	135	set_numeric_radix();
	136	}
	137
	138	#endif /* USE_LOCALE_NUMERIC */
	139	}
	140
	141	void
	142	Perl_set_numeric_standard(pTHX)
	143	{
	144	#ifdef USE_LOCALE_NUMERIC
	145
	146	if (! PL_numeric_standard) {
	147	setlocale(LC_NUMERIC, "C");
	148	PL_numeric_standard = TRUE;
	149	PL_numeric_local = FALSE;
	150	set_numeric_radix();
	151	}
	152
	153	#endif /* USE_LOCALE_NUMERIC */
	154	}
	155
	156	void
	157	Perl_set_numeric_local(pTHX)
	158	{
	159	#ifdef USE_LOCALE_NUMERIC
	160
	161	if (! PL_numeric_local) {
	162	setlocale(LC_NUMERIC, PL_numeric_name);
	163	PL_numeric_standard = FALSE;
	164	PL_numeric_local = TRUE;
	165	set_numeric_radix();
	166	}
	167
	168	#endif /* USE_LOCALE_NUMERIC */
	169	}
	170
	171	/*
	172	* Set up for a new ctype locale.
	173	*/
	174	void
	175	Perl_new_ctype(pTHX_ char *newctype)
	176	{
	177	#ifdef USE_LOCALE_CTYPE
27da23d5	178	dVAR;
98994639 HS	179	int i;
	180
	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 */
dd374669	191	(void)newctype;
98994639 HS	192	}
	193
	194	/*
	195	* Set up for a new collation locale.
	196	*/
	197	void
	198	Perl_new_collate(pTHX_ char *newcoll)
	199	{
	200	#ifdef USE_LOCALE_COLLATE
	201
	202	if (! newcoll) {
	203	if (PL_collation_name) {
	204	++PL_collation_ix;
	205	Safefree(PL_collation_name);
	206	PL_collation_name = NULL;
	207	}
	208	PL_collation_standard = TRUE;
	209	PL_collxfrm_base = 0;
	210	PL_collxfrm_mult = 2;
	211	return;
	212	}
	213
	214	if (! PL_collation_name \|\| strNE(PL_collation_name, newcoll)) {
	215	++PL_collation_ix;
	216	Safefree(PL_collation_name);
	217	PL_collation_name = stdize_locale(savepv(newcoll));
770526c1 NC	218	PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0')
770526c1 NC	219	\|\| strEQ(newcoll, "POSIX"));
98994639 HS	220
	221	{
	222	/* 2: at most so many chars ('a', 'b'). */
	223	/* 50: surely no system expands a char more. */
	224	#define XFRMBUFSIZE (2 * 50)
	225	char xbuf[XFRMBUFSIZE];
	226	Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
	227	Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
	228	SSize_t mult = fb - fa;
	229	if (mult < 1)
	230	Perl_croak(aTHX_ "strxfrm() gets absurd");
eb160463	231	PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
98994639 HS	232	PL_collxfrm_mult = mult;
	233	}
	234	}
	235
	236	#endif /* USE_LOCALE_COLLATE */
	237	}
	238
	239	/*
	240	* Initialize locale awareness.
	241	*/
	242	int
	243	Perl_init_i18nl10n(pTHX_ int printwarn)
	244	{
	245	int ok = 1;
	246	/* returns
	247	* 1 = set ok or not applicable,
	248	* 0 = fallback to C locale,
	249	* -1 = fallback to C locale failed
	250	*/
	251
	252	#if defined(USE_LOCALE)
	253
	254	#ifdef USE_LOCALE_CTYPE
	255	char *curctype = NULL;
	256	#endif /* USE_LOCALE_CTYPE */
	257	#ifdef USE_LOCALE_COLLATE
	258	char *curcoll = NULL;
	259	#endif /* USE_LOCALE_COLLATE */
	260	#ifdef USE_LOCALE_NUMERIC
	261	char *curnum = NULL;
	262	#endif /* USE_LOCALE_NUMERIC */
	263	#ifdef __GLIBC__
	264	char *language = PerlEnv_getenv("LANGUAGE");
	265	#endif
	266	char *lc_all = PerlEnv_getenv("LC_ALL");
	267	char *lang = PerlEnv_getenv("LANG");
	268	bool setlocale_failure = FALSE;
	269
	270	#ifdef LOCALE_ENVIRON_REQUIRED
	271
	272	/*
	273	* Ultrix setlocale(..., "") fails if there are no environment
	274	* variables from which to get a locale name.
	275	*/
	276
	277	bool done = FALSE;
	278
	279	#ifdef LC_ALL
	280	if (lang) {
	281	if (setlocale(LC_ALL, ""))
	282	done = TRUE;
	283	else
	284	setlocale_failure = TRUE;
	285	}
	286	if (!setlocale_failure) {
	287	#ifdef USE_LOCALE_CTYPE
	288	if (! (curctype =
	289	setlocale(LC_CTYPE,
	290	(!done && (lang \|\| PerlEnv_getenv("LC_CTYPE")))
	291	? "" : Nullch)))
	292	setlocale_failure = TRUE;
	293	else
	294	curctype = savepv(curctype);
	295	#endif /* USE_LOCALE_CTYPE */
296	#ifdef USE_LOCALE_COLLATE
297	if (! (curcoll =
298	setlocale(LC_COLLATE,
299	(!done && (lang \|\| PerlEnv_getenv("LC_COLLATE")))
300	? "" : Nullch)))
301	setlocale_failure = TRUE;
302	else
303	curcoll = savepv(curcoll);
304	#endif /* USE_LOCALE_COLLATE */
305	#ifdef USE_LOCALE_NUMERIC
306	if (! (curnum =
307	setlocale(LC_NUMERIC,
308	(!done && (lang \|\| PerlEnv_getenv("LC_NUMERIC")))
309	? "" : Nullch)))
310	setlocale_failure = TRUE;
311	else
312	curnum = savepv(curnum);
313	#endif /* USE_LOCALE_NUMERIC */
314	}
315
316	#endif /* LC_ALL */
317
318	#endif /* !LOCALE_ENVIRON_REQUIRED */
319
320	#ifdef LC_ALL
321	if (! setlocale(LC_ALL, ""))
322	setlocale_failure = TRUE;
323	#endif /* LC_ALL */
324
325	if (!setlocale_failure) {
326	#ifdef USE_LOCALE_CTYPE
327	if (! (curctype = setlocale(LC_CTYPE, "")))
328	setlocale_failure = TRUE;
329	else
330	curctype = savepv(curctype);
331	#endif /* USE_LOCALE_CTYPE */
332	#ifdef USE_LOCALE_COLLATE
333	if (! (curcoll = setlocale(LC_COLLATE, "")))
334	setlocale_failure = TRUE;
335	else
336	curcoll = savepv(curcoll);
337	#endif /* USE_LOCALE_COLLATE */
338	#ifdef USE_LOCALE_NUMERIC
339	if (! (curnum = setlocale(LC_NUMERIC, "")))
340	setlocale_failure = TRUE;
341	else
342	curnum = savepv(curnum);
343	#endif /* USE_LOCALE_NUMERIC */
344	}
345
346	if (setlocale_failure) {
347	char *p;
348	bool locwarn = (printwarn > 1 \|\|
349	(printwarn &&
350	(!(p = PerlEnv_getenv("PERL_BADLANG")) \|\| atoi(p))));
351
352	if (locwarn) {
353	#ifdef LC_ALL
354
355	PerlIO_printf(Perl_error_log,
356	"perl: warning: Setting locale failed.\n");
357
358	#else /* !LC_ALL */
359
360	PerlIO_printf(Perl_error_log,
361	"perl: warning: Setting locale failed for the categories:\n\t");
362	#ifdef USE_LOCALE_CTYPE
363	if (! curctype)
364	PerlIO_printf(Perl_error_log, "LC_CTYPE ");
365	#endif /* USE_LOCALE_CTYPE */
366	#ifdef USE_LOCALE_COLLATE
367	if (! curcoll)
368	PerlIO_printf(Perl_error_log, "LC_COLLATE ");
369	#endif /* USE_LOCALE_COLLATE */
370	#ifdef USE_LOCALE_NUMERIC
371	if (! curnum)
372	PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
373	#endif /* USE_LOCALE_NUMERIC */
374	PerlIO_printf(Perl_error_log, "\n");
375
376	#endif /* LC_ALL */
377
378	PerlIO_printf(Perl_error_log,
379	"perl: warning: Please check that your locale settings:\n");
380
381	#ifdef __GLIBC__
382	PerlIO_printf(Perl_error_log,
383	"\tLANGUAGE = %c%s%c,\n",
384	language ? '"' : '(',
385	language ? language : "unset",
386	language ? '"' : ')');
387	#endif
388
389	PerlIO_printf(Perl_error_log,
390	"\tLC_ALL = %c%s%c,\n",
391	lc_all ? '"' : '(',
392	lc_all ? lc_all : "unset",
393	lc_all ? '"' : ')');
394
395	#if defined(USE_ENVIRON_ARRAY)
396	{
397	char **e;
398	for (e = environ; *e; e++) {
399	if (strnEQ(*e, "LC_", 3)
400	&& strnNE(*e, "LC_ALL=", 7)
401	&& (p = strchr(*e, '=')))
402	PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
403	(int)(p - e), e, p + 1);
404	}
405	}
406	#else
407	PerlIO_printf(Perl_error_log,
408	"\t(possibly more locale environment variables)\n");
409	#endif
410
411	PerlIO_printf(Perl_error_log,
412	"\tLANG = %c%s%c\n",
413	lang ? '"' : '(',
414	lang ? lang : "unset",
415	lang ? '"' : ')');
416
417	PerlIO_printf(Perl_error_log,
418	" are supported and installed on your system.\n");
419	}
420
421	#ifdef LC_ALL
422
423	if (setlocale(LC_ALL, "C")) {
424	if (locwarn)
425	PerlIO_printf(Perl_error_log,
426	"perl: warning: Falling back to the standard locale (\"C\").\n");
427	ok = 0;
428	}
429	else {
430	if (locwarn)
431	PerlIO_printf(Perl_error_log,
432	"perl: warning: Failed to fall back to the standard locale (\"C\").\n");
433	ok = -1;
434	}
435
436	#else /* ! LC_ALL */
437
438	if (0
439	#ifdef USE_LOCALE_CTYPE
440	\|\| !(curctype \|\| setlocale(LC_CTYPE, "C"))
441	#endif /* USE_LOCALE_CTYPE */
442	#ifdef USE_LOCALE_COLLATE
443	\|\| !(curcoll \|\| setlocale(LC_COLLATE, "C"))
444	#endif /* USE_LOCALE_COLLATE */
445	#ifdef USE_LOCALE_NUMERIC
446	\|\| !(curnum \|\| setlocale(LC_NUMERIC, "C"))
447	#endif /* USE_LOCALE_NUMERIC */
448	)
449	{
450	if (locwarn)
451	PerlIO_printf(Perl_error_log,
452	"perl: warning: Cannot fall back to the standard locale (\"C\").\n");
453	ok = -1;
454	}
455
456	#endif /* ! LC_ALL */
457
458	#ifdef USE_LOCALE_CTYPE
459	curctype = savepv(setlocale(LC_CTYPE, Nullch));
460	#endif /* USE_LOCALE_CTYPE */
461	#ifdef USE_LOCALE_COLLATE
462	curcoll = savepv(setlocale(LC_COLLATE, Nullch));
463	#endif /* USE_LOCALE_COLLATE */
464	#ifdef USE_LOCALE_NUMERIC
465	curnum = savepv(setlocale(LC_NUMERIC, Nullch));
466	#endif /* USE_LOCALE_NUMERIC */
467	}
468	else {
469
470	#ifdef USE_LOCALE_CTYPE
471	new_ctype(curctype);
472	#endif /* USE_LOCALE_CTYPE */
473
474	#ifdef USE_LOCALE_COLLATE
475	new_collate(curcoll);
476	#endif /* USE_LOCALE_COLLATE */
477
478	#ifdef USE_LOCALE_NUMERIC
479	new_numeric(curnum);
480	#endif /* USE_LOCALE_NUMERIC */
b310b053	481
98994639 HS	482	}
	483
	484	#endif /* USE_LOCALE */
	485
ec71e770	486	#ifdef USE_PERLIO
b310b053	487	{
fde18df1	488	/* Set PL_utf8locale to TRUE if using PerlIO _and_
ec71e770	489	any of the following are true:
085a54d9	490	- nl_langinfo(CODESET) contains /^utf-?8/i
61de9fb5	491	- $ENV{LC_ALL} contains /^utf-?8/i
085a54d9	492	- $ENV{LC_CTYPE} contains /^utf-?8/i
61de9fb5 JH	493	- $ENV{LANG} contains /^utf-?8/i
	494	The LC_ALL, LC_CTYPE, LANG obey the usual override
	495	hierarchy of locale environment variables. (LANGUAGE
	496	affects only LC_MESSAGES only under glibc.) (If present,
	497	it overrides LC_MESSAGES for GNU gettext, and it also
	498	can have more than one locale, separated by spaces,
	499	in case you need to know.)
8aa8f774	500	If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE})
a05d7ebb	501	are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer
fde18df1	502	on STDIN, STDOUT, STDERR, _and_ the default open discipline.
085a54d9	503	*/
fde18df1	504	bool utf8locale = FALSE;
b310b053 JH	505	char *codeset = NULL;
	506	#if defined(HAS_NL_LANGINFO) && defined(CODESET)
	507	codeset = nl_langinfo(CODESET);
	508	#endif
61de9fb5	509	if (codeset)
fde18df1 JH	510	utf8locale = (ibcmp(codeset, "UTF-8", 5) == 0 \|\|
fde18df1 JH	511	ibcmp(codeset, "UTF8", 4) == 0);
077a72a9	512	#if defined(USE_LOCALE)
61de9fb5 JH	513	else { /* nl_langinfo(CODESET) is supposed to correctly
	514	* interpret the locale environment variables,
	515	* but just in case it fails, let's do this manually. */
	516	if (lang)
fde18df1 JH	517	utf8locale = (ibcmp(lang, "UTF-8", 5) == 0 \|\|
fde18df1 JH	518	ibcmp(lang, "UTF8", 4) == 0);
b310b053	519	#ifdef USE_LOCALE_CTYPE
61de9fb5	520	if (curctype)
fde18df1 JH	521	utf8locale = (ibcmp(curctype, "UTF-8", 5) == 0 \|\|
fde18df1 JH	522	ibcmp(curctype, "UTF8", 4) == 0);
b310b053	523	#endif
61de9fb5	524	if (lc_all)
fde18df1 JH	525	utf8locale = (ibcmp(lc_all, "UTF-8", 5) == 0 \|\|
fde18df1 JH	526	ibcmp(lc_all, "UTF8", 4) == 0);
61de9fb5	527	}
fde18df1 JH	528	#endif /* USE_LOCALE */
	529	if (utf8locale)
	530	PL_utf8locale = TRUE;
	531	}
a05d7ebb	532	/* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
fde18df1 JH	533	This is an alternative to using the -C command line switch
	534	(the -C if present will override this). */
	535	{
dd374669	536	const char *p = PerlEnv_getenv("PERL_UNICODE");
a05d7ebb	537	PL_unicode = p ? parse_unicode_opts(&p) : 0;
b310b053	538	}
ec71e770	539	#endif
b310b053	540
98994639 HS	541	#ifdef USE_LOCALE_CTYPE
	542	if (curctype != NULL)
	543	Safefree(curctype);
	544	#endif /* USE_LOCALE_CTYPE */
	545	#ifdef USE_LOCALE_COLLATE
	546	if (curcoll != NULL)
	547	Safefree(curcoll);
	548	#endif /* USE_LOCALE_COLLATE */
	549	#ifdef USE_LOCALE_NUMERIC
	550	if (curnum != NULL)
	551	Safefree(curnum);
	552	#endif /* USE_LOCALE_NUMERIC */
	553	return ok;
	554	}
	555
	556	/* Backwards compatibility. */
	557	int
	558	Perl_init_i18nl14n(pTHX_ int printwarn)
	559	{
	560	return init_i18nl10n(printwarn);
	561	}
	562
	563	#ifdef USE_LOCALE_COLLATE
	564
	565	/*
	566	* mem_collxfrm() is a bit like strxfrm() but with two important
	567	* differences. First, it handles embedded NULs. Second, it allocates
	568	* a bit more memory than needed for the transformed data itself.
	569	* The real transformed data begins at offset sizeof(collationix).
	570	* Please see sv_collxfrm() to see how this is used.
	571	*/
166f8a29	572
98994639 HS	573	char *
	574	Perl_mem_collxfrm(pTHX_ const char s, STRLEN len, STRLEN xlen)
	575	{
	576	char *xbuf;
	577	STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
	578
	579	/* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
	580	/* the +1 is for the terminating NUL. */
	581
	582	xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
	583	New(171, xbuf, xAlloc, char);
	584	if (! xbuf)
	585	goto bad;
	586
	587	(U32)xbuf = PL_collation_ix;
	588	xout = sizeof(PL_collation_ix);
	589	for (xin = 0; xin < len; ) {
	590	SSize_t xused;
	591
	592	for (;;) {
	593	xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
	594	if (xused == -1)
	595	goto bad;
eb160463	596	if ((STRLEN)xused < xAlloc - xout)
98994639 HS	597	break;
	598	xAlloc = (2 * xAlloc) + 1;
	599	Renew(xbuf, xAlloc, char);
	600	if (! xbuf)
	601	goto bad;
	602	}
	603
	604	xin += strlen(s + xin) + 1;
	605	xout += xused;
	606
	607	/* Embedded NULs are understood but silently skipped
	608	* because they make no sense in locale collation. */
	609	}
	610
	611	xbuf[xout] = '\0';
	612	*xlen = xout - sizeof(PL_collation_ix);
	613	return xbuf;
	614
	615	bad:
	616	Safefree(xbuf);
	617	*xlen = 0;
	618	return NULL;
	619	}
	620
	621	#endif /* USE_LOCALE_COLLATE */
	622
66610fdd RGS	623	/*
	624	* Local variables:
	625	* c-indentation-style: bsd
	626	* c-basic-offset: 4
	627	* indent-tabs-mode: t
	628	* End:
	629	*
37442d52 RGS	630	* ex: set ts=8 sts=4 sw=4 noet:
37442d52 RGS	631	*/