[p5sagit/p5-mst-13.2.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)
{
    const char * const s = strchr(locs, '=');
    bool okay = TRUE;

    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
# 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 = 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_ const char *newnum)
{
#ifdef USE_LOCALE_NUMERIC

    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

    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_ const 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 */
    PERL_UNUSED_ARG(newctype);
}

/*
 * Set up for a new collation locale.
 */
void
Perl_new_collate(pTHX_ const 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];
	  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)

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