[perl5.git] / locale.c

/*    locale.c
 *
 *    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
 *    2000, 2001, 2002, 2003, 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!
 */

#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"

/*
 * 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;
}

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 = (strEQ(newnum, "C") || 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

    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 */
}

/*
 * 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 = (strEQ(newcoll, "C") || 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). */
    {
	 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 */
Commit	Line	Data
98994639 HS	1	/* locale.c
98994639 HS	2	*
4bb101f2 JH	3	* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4bb101f2 JH	4	* 2000, 2001, 2002, 2003, 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
	21	#include "EXTERN.h"
	22	#define PERL_IN_LOCALE_C
	23	#include "perl.h"
	24
	25	#ifdef I_LOCALE
	26	# include <locale.h>
	27	#endif
	28
b310b053 JH	29	#ifdef I_LANGINFO
	30	# include <langinfo.h>
	31	#endif
	32
a4af207c JH	33	#include "reentr.h"
a4af207c JH	34
98994639 HS	35	/*
	36	* Standardize the locale name from a string returned by 'setlocale'.
	37	*
	38	* The standard return value of setlocale() is either
	39	* (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
	40	* (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
	41	* (the space-separated values represent the various sublocales,
	42	* in some unspecificed order)
	43	*
	44	* In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
	45	* which is harmful for further use of the string in setlocale().
	46	*
	47	*/
	48	STATIC char *
	49	S_stdize_locale(pTHX_ char *locs)
	50	{
	51	char *s;
	52	bool okay = TRUE;
	53
	54	if ((s = strchr(locs, '='))) {
	55	char *t;
	56
	57	okay = FALSE;
	58	if ((t = strchr(s, '.'))) {
	59	char *u;
	60
	61	if ((u = strchr(t, '\n'))) {
	62
	63	if (u[1] == 0) {
	64	STRLEN len = u - s;
	65	Move(s + 1, locs, len, char);
	66	locs[len] = 0;
	67	okay = TRUE;
	68	}
	69	}
	70	}
	71	}
	72
	73	if (!okay)
	74	Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
	75
	76	return locs;
	77	}
	78
	79	void
	80	Perl_set_numeric_radix(pTHX)
	81	{
	82	#ifdef USE_LOCALE_NUMERIC
	83	# ifdef HAS_LOCALECONV
	84	struct lconv* lc;
	85
	86	lc = localeconv();
	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
109	Perl_new_numeric(pTHX_ char *newnum)
110	{
111	#ifdef USE_LOCALE_NUMERIC
112
113	if (! newnum) {
114	if (PL_numeric_name) {
115	Safefree(PL_numeric_name);
116	PL_numeric_name = NULL;
117	}
118	PL_numeric_standard = TRUE;
119	PL_numeric_local = TRUE;
120	return;
121	}
122
123	if (! PL_numeric_name \|\| strNE(PL_numeric_name, newnum)) {
124	Safefree(PL_numeric_name);
125	PL_numeric_name = stdize_locale(savepv(newnum));
126	PL_numeric_standard = (strEQ(newnum, "C") \|\| strEQ(newnum, "POSIX"));
127	PL_numeric_local = TRUE;
128	set_numeric_radix();
129	}
130
131	#endif /* USE_LOCALE_NUMERIC */
132	}
133
134	void
135	Perl_set_numeric_standard(pTHX)
136	{
137	#ifdef USE_LOCALE_NUMERIC
138
139	if (! PL_numeric_standard) {
140	setlocale(LC_NUMERIC, "C");
141	PL_numeric_standard = TRUE;
142	PL_numeric_local = FALSE;
143	set_numeric_radix();
144	}
145
146	#endif /* USE_LOCALE_NUMERIC */
147	}
148
149	void
150	Perl_set_numeric_local(pTHX)
151	{
152	#ifdef USE_LOCALE_NUMERIC
153
154	if (! PL_numeric_local) {
155	setlocale(LC_NUMERIC, PL_numeric_name);
156	PL_numeric_standard = FALSE;
157	PL_numeric_local = TRUE;
158	set_numeric_radix();
159	}
160
161	#endif /* USE_LOCALE_NUMERIC */
162	}
163
164	/*
165	* Set up for a new ctype locale.
166	*/
167	void
168	Perl_new_ctype(pTHX_ char *newctype)
169	{
170	#ifdef USE_LOCALE_CTYPE
171
172	int i;
173
174	for (i = 0; i < 256; i++) {
175	if (isUPPER_LC(i))
176	PL_fold_locale[i] = toLOWER_LC(i);
177	else if (isLOWER_LC(i))
178	PL_fold_locale[i] = toUPPER_LC(i);
179	else
180	PL_fold_locale[i] = i;
181	}
182
183	#endif /* USE_LOCALE_CTYPE */
184	}
185
186	/*
187	* Set up for a new collation locale.
188	*/
189	void
190	Perl_new_collate(pTHX_ char *newcoll)
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));
210	PL_collation_standard = (strEQ(newcoll, "C") \|\| strEQ(newcoll, "POSIX"));
211
212	{
213	/* 2: at most so many chars ('a', 'b'). */
214	/* 50: surely no system expands a char more. */
215	#define XFRMBUFSIZE (2 * 50)
216	char xbuf[XFRMBUFSIZE];
217	Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
218	Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
219	SSize_t mult = fb - fa;
220	if (mult < 1)
221	Perl_croak(aTHX_ "strxfrm() gets absurd");
eb160463	222	PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
98994639 HS	223	PL_collxfrm_mult = mult;
	224	}
	225	}
	226
	227	#endif /* USE_LOCALE_COLLATE */
	228	}
	229
	230	/*
	231	* Initialize locale awareness.
	232	*/
	233	int
	234	Perl_init_i18nl10n(pTHX_ int printwarn)
	235	{
	236	int ok = 1;
	237	/* returns
	238	* 1 = set ok or not applicable,
	239	* 0 = fallback to C locale,
	240	* -1 = fallback to C locale failed
	241	*/
	242
	243	#if defined(USE_LOCALE)
	244
	245	#ifdef USE_LOCALE_CTYPE
	246	char *curctype = NULL;
	247	#endif /* USE_LOCALE_CTYPE */
	248	#ifdef USE_LOCALE_COLLATE
	249	char *curcoll = NULL;
	250	#endif /* USE_LOCALE_COLLATE */
	251	#ifdef USE_LOCALE_NUMERIC
	252	char *curnum = NULL;
	253	#endif /* USE_LOCALE_NUMERIC */
	254	#ifdef __GLIBC__
	255	char *language = PerlEnv_getenv("LANGUAGE");
	256	#endif
	257	char *lc_all = PerlEnv_getenv("LC_ALL");
	258	char *lang = PerlEnv_getenv("LANG");
	259	bool setlocale_failure = FALSE;
	260
	261	#ifdef LOCALE_ENVIRON_REQUIRED
	262
	263	/*
	264	* Ultrix setlocale(..., "") fails if there are no environment
	265	* variables from which to get a locale name.
	266	*/
	267
	268	bool done = FALSE;
	269
	270	#ifdef LC_ALL
	271	if (lang) {
	272	if (setlocale(LC_ALL, ""))
	273	done = TRUE;
	274	else
	275	setlocale_failure = TRUE;
	276	}
	277	if (!setlocale_failure) {
	278	#ifdef USE_LOCALE_CTYPE
	279	if (! (curctype =
	280	setlocale(LC_CTYPE,
	281	(!done && (lang \|\| PerlEnv_getenv("LC_CTYPE")))
	282	? "" : Nullch)))
	283	setlocale_failure = TRUE;
	284	else
	285	curctype = savepv(curctype);
	286	#endif /* USE_LOCALE_CTYPE */
287	#ifdef USE_LOCALE_COLLATE
288	if (! (curcoll =
289	setlocale(LC_COLLATE,
290	(!done && (lang \|\| PerlEnv_getenv("LC_COLLATE")))
291	? "" : Nullch)))
292	setlocale_failure = TRUE;
293	else
294	curcoll = savepv(curcoll);
295	#endif /* USE_LOCALE_COLLATE */
296	#ifdef USE_LOCALE_NUMERIC
297	if (! (curnum =
298	setlocale(LC_NUMERIC,
299	(!done && (lang \|\| PerlEnv_getenv("LC_NUMERIC")))
300	? "" : Nullch)))
301	setlocale_failure = TRUE;
302	else
303	curnum = savepv(curnum);
304	#endif /* USE_LOCALE_NUMERIC */
305	}
306
307	#endif /* LC_ALL */
308
309	#endif /* !LOCALE_ENVIRON_REQUIRED */
310
311	#ifdef LC_ALL
312	if (! setlocale(LC_ALL, ""))
313	setlocale_failure = TRUE;
314	#endif /* LC_ALL */
315
316	if (!setlocale_failure) {
317	#ifdef USE_LOCALE_CTYPE
318	if (! (curctype = setlocale(LC_CTYPE, "")))
319	setlocale_failure = TRUE;
320	else
321	curctype = savepv(curctype);
322	#endif /* USE_LOCALE_CTYPE */
323	#ifdef USE_LOCALE_COLLATE
324	if (! (curcoll = setlocale(LC_COLLATE, "")))
325	setlocale_failure = TRUE;
326	else
327	curcoll = savepv(curcoll);
328	#endif /* USE_LOCALE_COLLATE */
329	#ifdef USE_LOCALE_NUMERIC
330	if (! (curnum = setlocale(LC_NUMERIC, "")))
331	setlocale_failure = TRUE;
332	else
333	curnum = savepv(curnum);
334	#endif /* USE_LOCALE_NUMERIC */
335	}
336
337	if (setlocale_failure) {
338	char *p;
339	bool locwarn = (printwarn > 1 \|\|
340	(printwarn &&
341	(!(p = PerlEnv_getenv("PERL_BADLANG")) \|\| atoi(p))));
342
343	if (locwarn) {
344	#ifdef LC_ALL
345
346	PerlIO_printf(Perl_error_log,
347	"perl: warning: Setting locale failed.\n");
348
349	#else /* !LC_ALL */
350
351	PerlIO_printf(Perl_error_log,
352	"perl: warning: Setting locale failed for the categories:\n\t");
353	#ifdef USE_LOCALE_CTYPE
354	if (! curctype)
355	PerlIO_printf(Perl_error_log, "LC_CTYPE ");
356	#endif /* USE_LOCALE_CTYPE */
357	#ifdef USE_LOCALE_COLLATE
358	if (! curcoll)
359	PerlIO_printf(Perl_error_log, "LC_COLLATE ");
360	#endif /* USE_LOCALE_COLLATE */
361	#ifdef USE_LOCALE_NUMERIC
362	if (! curnum)
363	PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
364	#endif /* USE_LOCALE_NUMERIC */
365	PerlIO_printf(Perl_error_log, "\n");
366
367	#endif /* LC_ALL */
368
369	PerlIO_printf(Perl_error_log,
370	"perl: warning: Please check that your locale settings:\n");
371
372	#ifdef __GLIBC__
373	PerlIO_printf(Perl_error_log,
374	"\tLANGUAGE = %c%s%c,\n",
375	language ? '"' : '(',
376	language ? language : "unset",
377	language ? '"' : ')');
378	#endif
379
380	PerlIO_printf(Perl_error_log,
381	"\tLC_ALL = %c%s%c,\n",
382	lc_all ? '"' : '(',
383	lc_all ? lc_all : "unset",
384	lc_all ? '"' : ')');
385
386	#if defined(USE_ENVIRON_ARRAY)
387	{
388	char **e;
389	for (e = environ; *e; e++) {
390	if (strnEQ(*e, "LC_", 3)
391	&& strnNE(*e, "LC_ALL=", 7)
392	&& (p = strchr(*e, '=')))
393	PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
394	(int)(p - e), e, p + 1);
395	}
396	}
397	#else
398	PerlIO_printf(Perl_error_log,
399	"\t(possibly more locale environment variables)\n");
400	#endif
401
402	PerlIO_printf(Perl_error_log,
403	"\tLANG = %c%s%c\n",
404	lang ? '"' : '(',
405	lang ? lang : "unset",
406	lang ? '"' : ')');
407
408	PerlIO_printf(Perl_error_log,
409	" are supported and installed on your system.\n");
410	}
411
412	#ifdef LC_ALL
413
414	if (setlocale(LC_ALL, "C")) {
415	if (locwarn)
416	PerlIO_printf(Perl_error_log,
417	"perl: warning: Falling back to the standard locale (\"C\").\n");
418	ok = 0;
419	}
420	else {
421	if (locwarn)
422	PerlIO_printf(Perl_error_log,
423	"perl: warning: Failed to fall back to the standard locale (\"C\").\n");
424	ok = -1;
425	}
426
427	#else /* ! LC_ALL */
428
429	if (0
430	#ifdef USE_LOCALE_CTYPE
431	\|\| !(curctype \|\| setlocale(LC_CTYPE, "C"))
432	#endif /* USE_LOCALE_CTYPE */
433	#ifdef USE_LOCALE_COLLATE
434	\|\| !(curcoll \|\| setlocale(LC_COLLATE, "C"))
435	#endif /* USE_LOCALE_COLLATE */
436	#ifdef USE_LOCALE_NUMERIC
437	\|\| !(curnum \|\| setlocale(LC_NUMERIC, "C"))
438	#endif /* USE_LOCALE_NUMERIC */
439	)
440	{
441	if (locwarn)
442	PerlIO_printf(Perl_error_log,
443	"perl: warning: Cannot fall back to the standard locale (\"C\").\n");
444	ok = -1;
445	}
446
447	#endif /* ! LC_ALL */
448
449	#ifdef USE_LOCALE_CTYPE
450	curctype = savepv(setlocale(LC_CTYPE, Nullch));
451	#endif /* USE_LOCALE_CTYPE */
452	#ifdef USE_LOCALE_COLLATE
453	curcoll = savepv(setlocale(LC_COLLATE, Nullch));
454	#endif /* USE_LOCALE_COLLATE */
455	#ifdef USE_LOCALE_NUMERIC
456	curnum = savepv(setlocale(LC_NUMERIC, Nullch));
457	#endif /* USE_LOCALE_NUMERIC */
458	}
459	else {
460
461	#ifdef USE_LOCALE_CTYPE
462	new_ctype(curctype);
463	#endif /* USE_LOCALE_CTYPE */
464
465	#ifdef USE_LOCALE_COLLATE
466	new_collate(curcoll);
467	#endif /* USE_LOCALE_COLLATE */
468
469	#ifdef USE_LOCALE_NUMERIC
470	new_numeric(curnum);
471	#endif /* USE_LOCALE_NUMERIC */
b310b053	472
98994639 HS	473	}
	474
	475	#endif /* USE_LOCALE */
	476
ec71e770	477	#ifdef USE_PERLIO
b310b053	478	{
fde18df1	479	/* Set PL_utf8locale to TRUE if using PerlIO _and_
ec71e770	480	any of the following are true:
085a54d9	481	- nl_langinfo(CODESET) contains /^utf-?8/i
61de9fb5	482	- $ENV{LC_ALL} contains /^utf-?8/i
085a54d9	483	- $ENV{LC_CTYPE} contains /^utf-?8/i
61de9fb5 JH	484	- $ENV{LANG} contains /^utf-?8/i
	485	The LC_ALL, LC_CTYPE, LANG obey the usual override
	486	hierarchy of locale environment variables. (LANGUAGE
	487	affects only LC_MESSAGES only under glibc.) (If present,
	488	it overrides LC_MESSAGES for GNU gettext, and it also
	489	can have more than one locale, separated by spaces,
	490	in case you need to know.)
8aa8f774	491	If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE})
a05d7ebb	492	are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer
fde18df1	493	on STDIN, STDOUT, STDERR, _and_ the default open discipline.
085a54d9	494	*/
fde18df1	495	bool utf8locale = FALSE;
b310b053 JH	496	char *codeset = NULL;
	497	#if defined(HAS_NL_LANGINFO) && defined(CODESET)
	498	codeset = nl_langinfo(CODESET);
	499	#endif
61de9fb5	500	if (codeset)
fde18df1 JH	501	utf8locale = (ibcmp(codeset, "UTF-8", 5) == 0 \|\|
fde18df1 JH	502	ibcmp(codeset, "UTF8", 4) == 0);
077a72a9	503	#if defined(USE_LOCALE)
61de9fb5 JH	504	else { /* nl_langinfo(CODESET) is supposed to correctly
	505	* interpret the locale environment variables,
	506	* but just in case it fails, let's do this manually. */
	507	if (lang)
fde18df1 JH	508	utf8locale = (ibcmp(lang, "UTF-8", 5) == 0 \|\|
fde18df1 JH	509	ibcmp(lang, "UTF8", 4) == 0);
b310b053	510	#ifdef USE_LOCALE_CTYPE
61de9fb5	511	if (curctype)
fde18df1 JH	512	utf8locale = (ibcmp(curctype, "UTF-8", 5) == 0 \|\|
fde18df1 JH	513	ibcmp(curctype, "UTF8", 4) == 0);
b310b053	514	#endif
61de9fb5	515	if (lc_all)
fde18df1 JH	516	utf8locale = (ibcmp(lc_all, "UTF-8", 5) == 0 \|\|
fde18df1 JH	517	ibcmp(lc_all, "UTF8", 4) == 0);
61de9fb5	518	}
fde18df1 JH	519	#endif /* USE_LOCALE */
	520	if (utf8locale)
	521	PL_utf8locale = TRUE;
	522	}
a05d7ebb	523	/* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
fde18df1 JH	524	This is an alternative to using the -C command line switch
	525	(the -C if present will override this). */
	526	{
a05d7ebb JH	527	char *p = PerlEnv_getenv("PERL_UNICODE");
a05d7ebb JH	528	PL_unicode = p ? parse_unicode_opts(&p) : 0;
b310b053	529	}
ec71e770	530	#endif
b310b053	531
98994639 HS	532	#ifdef USE_LOCALE_CTYPE
	533	if (curctype != NULL)
	534	Safefree(curctype);
	535	#endif /* USE_LOCALE_CTYPE */
	536	#ifdef USE_LOCALE_COLLATE
	537	if (curcoll != NULL)
	538	Safefree(curcoll);
	539	#endif /* USE_LOCALE_COLLATE */
	540	#ifdef USE_LOCALE_NUMERIC
	541	if (curnum != NULL)
	542	Safefree(curnum);
	543	#endif /* USE_LOCALE_NUMERIC */
	544	return ok;
	545	}
	546
	547	/* Backwards compatibility. */
	548	int
	549	Perl_init_i18nl14n(pTHX_ int printwarn)
	550	{
	551	return init_i18nl10n(printwarn);
	552	}
	553
	554	#ifdef USE_LOCALE_COLLATE
	555
	556	/*
	557	* mem_collxfrm() is a bit like strxfrm() but with two important
	558	* differences. First, it handles embedded NULs. Second, it allocates
	559	* a bit more memory than needed for the transformed data itself.
	560	* The real transformed data begins at offset sizeof(collationix).
	561	* Please see sv_collxfrm() to see how this is used.
	562	*/
	563	char *
	564	Perl_mem_collxfrm(pTHX_ const char s, STRLEN len, STRLEN xlen)
	565	{
	566	char *xbuf;
	567	STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
	568
	569	/* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
	570	/* the +1 is for the terminating NUL. */
	571
	572	xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
	573	New(171, xbuf, xAlloc, char);
	574	if (! xbuf)
	575	goto bad;
	576
	577	(U32)xbuf = PL_collation_ix;
	578	xout = sizeof(PL_collation_ix);
	579	for (xin = 0; xin < len; ) {
	580	SSize_t xused;
	581
	582	for (;;) {
	583	xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
	584	if (xused == -1)
	585	goto bad;
eb160463	586	if ((STRLEN)xused < xAlloc - xout)
98994639 HS	587	break;
	588	xAlloc = (2 * xAlloc) + 1;
	589	Renew(xbuf, xAlloc, char);
	590	if (! xbuf)
	591	goto bad;
	592	}
	593
	594	xin += strlen(s + xin) + 1;
	595	xout += xused;
	596
	597	/* Embedded NULs are understood but silently skipped
	598	* because they make no sense in locale collation. */
	599	}
	600
	601	xbuf[xout] = '\0';
	602	*xlen = xout - sizeof(PL_collation_ix);
	603	return xbuf;
	604
	605	bad:
	606	Safefree(xbuf);
	607	*xlen = 0;
	608	return NULL;
	609	}
	610
	611	#endif /* USE_LOCALE_COLLATE */
	612