[perl5.git] / locale.c

/*    locale.c
 *
 *    Copyright (c) 2001-2002, Larry Wall
 *
 *    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

/*
 * 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 */

    {
	 bool wantutf8 = FALSE;
	 char *codeset = NULL;
#if defined(HAS_NL_LANGINFO) && defined(CODESET)
	 codeset = nl_langinfo(CODESET);
#endif
	 if (codeset &&
	     (ibcmp(codeset,  "UTF-8", 5) == 0 ||
	      ibcmp(codeset,  "UTF8",  4) == 0))
	      wantutf8 = TRUE;
#if defined(USE_LOCALE)
#ifdef __GLIBC__
	 if (!wantutf8 && language &&
	     (ibcmp(language, "UTF-8", 5) == 0 ||
	      ibcmp(language, "UTF8",  4) == 0))
	      wantutf8 = TRUE;
#endif
	 if (!wantutf8 && lc_all &&
	     (ibcmp(lc_all,   "UTF-8", 5) == 0 ||
	      ibcmp(lc_all,   "UTF8",  4) == 0))
	      wantutf8 = TRUE;
#ifdef USE_LOCALE_CTYPE
	 if (!wantutf8 && curctype &&
	     (ibcmp(curctype,     "UTF-8", 5) == 0 ||
	      ibcmp(curctype,     "UTF8",  4) == 0))
	      wantutf8 = TRUE;
#endif
	 if (!wantutf8 && lang &&
	     (ibcmp(lang,     "UTF-8", 5) == 0 ||
	      ibcmp(lang,     "UTF8",  4) == 0))
	      wantutf8 = TRUE;
#endif /* USE_LOCALE */
	 if (wantutf8)
	      PL_wantutf8 = TRUE;
    }

#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	*
be3c0a43	3	* Copyright (c) 2001-2002, Larry Wall
98994639 HS	4	*
	5	* You may distribute under the terms of either the GNU General Public
	6	* License or the Artistic License, as specified in the README file.
	7	*
	8	*/
	9
	10	/*
	11	* A Elbereth Gilthoniel,
	12	* silivren penna míriel
	13	* o menel aglar elenath!
	14	* Na-chaered palan-díriel
	15	* o galadhremmin ennorath,
	16	* Fanuilos, le linnathon
	17	* nef aear, si nef aearon!
	18	*/
	19
	20	#include "EXTERN.h"
	21	#define PERL_IN_LOCALE_C
	22	#include "perl.h"
	23
	24	#ifdef I_LOCALE
	25	# include <locale.h>
	26	#endif
	27
b310b053 JH	28	#ifdef I_LANGINFO
	29	# include <langinfo.h>
	30	#endif
	31
98994639 HS	32	/*
	33	* Standardize the locale name from a string returned by 'setlocale'.
	34	*
	35	* The standard return value of setlocale() is either
	36	* (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
	37	* (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
	38	* (the space-separated values represent the various sublocales,
	39	* in some unspecificed order)
	40	*
	41	* In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
	42	* which is harmful for further use of the string in setlocale().
	43	*
	44	*/
	45	STATIC char *
	46	S_stdize_locale(pTHX_ char *locs)
	47	{
	48	char *s;
	49	bool okay = TRUE;
	50
	51	if ((s = strchr(locs, '='))) {
	52	char *t;
	53
	54	okay = FALSE;
	55	if ((t = strchr(s, '.'))) {
	56	char *u;
	57
	58	if ((u = strchr(t, '\n'))) {
	59
	60	if (u[1] == 0) {
	61	STRLEN len = u - s;
	62	Move(s + 1, locs, len, char);
	63	locs[len] = 0;
	64	okay = TRUE;
	65	}
	66	}
	67	}
	68	}
	69
	70	if (!okay)
	71	Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
	72
	73	return locs;
	74	}
	75
	76	void
	77	Perl_set_numeric_radix(pTHX)
	78	{
	79	#ifdef USE_LOCALE_NUMERIC
	80	# ifdef HAS_LOCALECONV
	81	struct lconv* lc;
	82
	83	lc = localeconv();
	84	if (lc && lc->decimal_point) {
	85	if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
	86	SvREFCNT_dec(PL_numeric_radix_sv);
	87	PL_numeric_radix_sv = Nullsv;
	88	}
	89	else {
	90	if (PL_numeric_radix_sv)
	91	sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
	92	else
	93	PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
	94	}
	95	}
96	else
97	PL_numeric_radix_sv = Nullsv;
98	# endif /* HAS_LOCALECONV */
99	#endif /* USE_LOCALE_NUMERIC */
100	}
101
102	/*
103	* Set up for a new numeric locale.
104	*/
105	void
106	Perl_new_numeric(pTHX_ char *newnum)
107	{
108	#ifdef USE_LOCALE_NUMERIC
109
110	if (! newnum) {
111	if (PL_numeric_name) {
112	Safefree(PL_numeric_name);
113	PL_numeric_name = NULL;
114	}
115	PL_numeric_standard = TRUE;
116	PL_numeric_local = TRUE;
117	return;
118	}
119
120	if (! PL_numeric_name \|\| strNE(PL_numeric_name, newnum)) {
121	Safefree(PL_numeric_name);
122	PL_numeric_name = stdize_locale(savepv(newnum));
123	PL_numeric_standard = (strEQ(newnum, "C") \|\| strEQ(newnum, "POSIX"));
124	PL_numeric_local = TRUE;
125	set_numeric_radix();
126	}
127
128	#endif /* USE_LOCALE_NUMERIC */
129	}
130
131	void
132	Perl_set_numeric_standard(pTHX)
133	{
134	#ifdef USE_LOCALE_NUMERIC
135
136	if (! PL_numeric_standard) {
137	setlocale(LC_NUMERIC, "C");
138	PL_numeric_standard = TRUE;
139	PL_numeric_local = FALSE;
140	set_numeric_radix();
141	}
142
143	#endif /* USE_LOCALE_NUMERIC */
144	}
145
146	void
147	Perl_set_numeric_local(pTHX)
148	{
149	#ifdef USE_LOCALE_NUMERIC
150
151	if (! PL_numeric_local) {
152	setlocale(LC_NUMERIC, PL_numeric_name);
153	PL_numeric_standard = FALSE;
154	PL_numeric_local = TRUE;
155	set_numeric_radix();
156	}
157
158	#endif /* USE_LOCALE_NUMERIC */
159	}
160
161	/*
162	* Set up for a new ctype locale.
163	*/
164	void
165	Perl_new_ctype(pTHX_ char *newctype)
166	{
167	#ifdef USE_LOCALE_CTYPE
168
169	int i;
170
171	for (i = 0; i < 256; i++) {
172	if (isUPPER_LC(i))
173	PL_fold_locale[i] = toLOWER_LC(i);
174	else if (isLOWER_LC(i))
175	PL_fold_locale[i] = toUPPER_LC(i);
176	else
177	PL_fold_locale[i] = i;
178	}
179
180	#endif /* USE_LOCALE_CTYPE */
181	}
182
183	/*
184	* Set up for a new collation locale.
185	*/
186	void
187	Perl_new_collate(pTHX_ char *newcoll)
188	{
189	#ifdef USE_LOCALE_COLLATE
190
191	if (! newcoll) {
192	if (PL_collation_name) {
193	++PL_collation_ix;
194	Safefree(PL_collation_name);
195	PL_collation_name = NULL;
196	}
197	PL_collation_standard = TRUE;
198	PL_collxfrm_base = 0;
199	PL_collxfrm_mult = 2;
200	return;
201	}
202
203	if (! PL_collation_name \|\| strNE(PL_collation_name, newcoll)) {
204	++PL_collation_ix;
205	Safefree(PL_collation_name);
206	PL_collation_name = stdize_locale(savepv(newcoll));
207	PL_collation_standard = (strEQ(newcoll, "C") \|\| strEQ(newcoll, "POSIX"));
208
209	{
210	/* 2: at most so many chars ('a', 'b'). */
211	/* 50: surely no system expands a char more. */
212	#define XFRMBUFSIZE (2 * 50)
213	char xbuf[XFRMBUFSIZE];
214	Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
215	Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
216	SSize_t mult = fb - fa;
217	if (mult < 1)
218	Perl_croak(aTHX_ "strxfrm() gets absurd");
eb160463	219	PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
98994639 HS	220	PL_collxfrm_mult = mult;
	221	}
	222	}
	223
	224	#endif /* USE_LOCALE_COLLATE */
	225	}
	226
	227	/*
	228	* Initialize locale awareness.
	229	*/
	230	int
	231	Perl_init_i18nl10n(pTHX_ int printwarn)
	232	{
	233	int ok = 1;
	234	/* returns
	235	* 1 = set ok or not applicable,
	236	* 0 = fallback to C locale,
	237	* -1 = fallback to C locale failed
	238	*/
	239
	240	#if defined(USE_LOCALE)
	241
	242	#ifdef USE_LOCALE_CTYPE
	243	char *curctype = NULL;
	244	#endif /* USE_LOCALE_CTYPE */
	245	#ifdef USE_LOCALE_COLLATE
	246	char *curcoll = NULL;
	247	#endif /* USE_LOCALE_COLLATE */
	248	#ifdef USE_LOCALE_NUMERIC
	249	char *curnum = NULL;
	250	#endif /* USE_LOCALE_NUMERIC */
	251	#ifdef __GLIBC__
	252	char *language = PerlEnv_getenv("LANGUAGE");
	253	#endif
	254	char *lc_all = PerlEnv_getenv("LC_ALL");
	255	char *lang = PerlEnv_getenv("LANG");
	256	bool setlocale_failure = FALSE;
	257
	258	#ifdef LOCALE_ENVIRON_REQUIRED
	259
	260	/*
	261	* Ultrix setlocale(..., "") fails if there are no environment
	262	* variables from which to get a locale name.
	263	*/
	264
	265	bool done = FALSE;
	266
	267	#ifdef LC_ALL
	268	if (lang) {
	269	if (setlocale(LC_ALL, ""))
	270	done = TRUE;
	271	else
	272	setlocale_failure = TRUE;
	273	}
	274	if (!setlocale_failure) {
	275	#ifdef USE_LOCALE_CTYPE
	276	if (! (curctype =
	277	setlocale(LC_CTYPE,
	278	(!done && (lang \|\| PerlEnv_getenv("LC_CTYPE")))
	279	? "" : Nullch)))
	280	setlocale_failure = TRUE;
	281	else
	282	curctype = savepv(curctype);
	283	#endif /* USE_LOCALE_CTYPE */
284	#ifdef USE_LOCALE_COLLATE
285	if (! (curcoll =
286	setlocale(LC_COLLATE,
287	(!done && (lang \|\| PerlEnv_getenv("LC_COLLATE")))
288	? "" : Nullch)))
289	setlocale_failure = TRUE;
290	else
291	curcoll = savepv(curcoll);
292	#endif /* USE_LOCALE_COLLATE */
293	#ifdef USE_LOCALE_NUMERIC
294	if (! (curnum =
295	setlocale(LC_NUMERIC,
296	(!done && (lang \|\| PerlEnv_getenv("LC_NUMERIC")))
297	? "" : Nullch)))
298	setlocale_failure = TRUE;
299	else
300	curnum = savepv(curnum);
301	#endif /* USE_LOCALE_NUMERIC */
302	}
303
304	#endif /* LC_ALL */
305
306	#endif /* !LOCALE_ENVIRON_REQUIRED */
307
308	#ifdef LC_ALL
309	if (! setlocale(LC_ALL, ""))
310	setlocale_failure = TRUE;
311	#endif /* LC_ALL */
312
313	if (!setlocale_failure) {
314	#ifdef USE_LOCALE_CTYPE
315	if (! (curctype = setlocale(LC_CTYPE, "")))
316	setlocale_failure = TRUE;
317	else
318	curctype = savepv(curctype);
319	#endif /* USE_LOCALE_CTYPE */
320	#ifdef USE_LOCALE_COLLATE
321	if (! (curcoll = setlocale(LC_COLLATE, "")))
322	setlocale_failure = TRUE;
323	else
324	curcoll = savepv(curcoll);
325	#endif /* USE_LOCALE_COLLATE */
326	#ifdef USE_LOCALE_NUMERIC
327	if (! (curnum = setlocale(LC_NUMERIC, "")))
328	setlocale_failure = TRUE;
329	else
330	curnum = savepv(curnum);
331	#endif /* USE_LOCALE_NUMERIC */
332	}
333
334	if (setlocale_failure) {
335	char *p;
336	bool locwarn = (printwarn > 1 \|\|
337	(printwarn &&
338	(!(p = PerlEnv_getenv("PERL_BADLANG")) \|\| atoi(p))));
339
340	if (locwarn) {
341	#ifdef LC_ALL
342
343	PerlIO_printf(Perl_error_log,
344	"perl: warning: Setting locale failed.\n");
345
346	#else /* !LC_ALL */
347
348	PerlIO_printf(Perl_error_log,
349	"perl: warning: Setting locale failed for the categories:\n\t");
350	#ifdef USE_LOCALE_CTYPE
351	if (! curctype)
352	PerlIO_printf(Perl_error_log, "LC_CTYPE ");
353	#endif /* USE_LOCALE_CTYPE */
354	#ifdef USE_LOCALE_COLLATE
355	if (! curcoll)
356	PerlIO_printf(Perl_error_log, "LC_COLLATE ");
357	#endif /* USE_LOCALE_COLLATE */
358	#ifdef USE_LOCALE_NUMERIC
359	if (! curnum)
360	PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
361	#endif /* USE_LOCALE_NUMERIC */
362	PerlIO_printf(Perl_error_log, "\n");
363
364	#endif /* LC_ALL */
365
366	PerlIO_printf(Perl_error_log,
367	"perl: warning: Please check that your locale settings:\n");
368
369	#ifdef __GLIBC__
370	PerlIO_printf(Perl_error_log,
371	"\tLANGUAGE = %c%s%c,\n",
372	language ? '"' : '(',
373	language ? language : "unset",
374	language ? '"' : ')');
375	#endif
376
377	PerlIO_printf(Perl_error_log,
378	"\tLC_ALL = %c%s%c,\n",
379	lc_all ? '"' : '(',
380	lc_all ? lc_all : "unset",
381	lc_all ? '"' : ')');
382
383	#if defined(USE_ENVIRON_ARRAY)
384	{
385	char **e;
386	for (e = environ; *e; e++) {
387	if (strnEQ(*e, "LC_", 3)
388	&& strnNE(*e, "LC_ALL=", 7)
389	&& (p = strchr(*e, '=')))
390	PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
391	(int)(p - e), e, p + 1);
392	}
393	}
394	#else
395	PerlIO_printf(Perl_error_log,
396	"\t(possibly more locale environment variables)\n");
397	#endif
398
399	PerlIO_printf(Perl_error_log,
400	"\tLANG = %c%s%c\n",
401	lang ? '"' : '(',
402	lang ? lang : "unset",
403	lang ? '"' : ')');
404
405	PerlIO_printf(Perl_error_log,
406	" are supported and installed on your system.\n");
407	}
408
409	#ifdef LC_ALL
410
411	if (setlocale(LC_ALL, "C")) {
412	if (locwarn)
413	PerlIO_printf(Perl_error_log,
414	"perl: warning: Falling back to the standard locale (\"C\").\n");
415	ok = 0;
416	}
417	else {
418	if (locwarn)
419	PerlIO_printf(Perl_error_log,
420	"perl: warning: Failed to fall back to the standard locale (\"C\").\n");
421	ok = -1;
422	}
423
424	#else /* ! LC_ALL */
425
426	if (0
427	#ifdef USE_LOCALE_CTYPE
428	\|\| !(curctype \|\| setlocale(LC_CTYPE, "C"))
429	#endif /* USE_LOCALE_CTYPE */
430	#ifdef USE_LOCALE_COLLATE
431	\|\| !(curcoll \|\| setlocale(LC_COLLATE, "C"))
432	#endif /* USE_LOCALE_COLLATE */
433	#ifdef USE_LOCALE_NUMERIC
434	\|\| !(curnum \|\| setlocale(LC_NUMERIC, "C"))
435	#endif /* USE_LOCALE_NUMERIC */
436	)
437	{
438	if (locwarn)
439	PerlIO_printf(Perl_error_log,
440	"perl: warning: Cannot fall back to the standard locale (\"C\").\n");
441	ok = -1;
442	}
443
444	#endif /* ! LC_ALL */
445
446	#ifdef USE_LOCALE_CTYPE
447	curctype = savepv(setlocale(LC_CTYPE, Nullch));
448	#endif /* USE_LOCALE_CTYPE */
449	#ifdef USE_LOCALE_COLLATE
450	curcoll = savepv(setlocale(LC_COLLATE, Nullch));
451	#endif /* USE_LOCALE_COLLATE */
452	#ifdef USE_LOCALE_NUMERIC
453	curnum = savepv(setlocale(LC_NUMERIC, Nullch));
454	#endif /* USE_LOCALE_NUMERIC */
455	}
456	else {
457
458	#ifdef USE_LOCALE_CTYPE
459	new_ctype(curctype);
460	#endif /* USE_LOCALE_CTYPE */
461
462	#ifdef USE_LOCALE_COLLATE
463	new_collate(curcoll);
464	#endif /* USE_LOCALE_COLLATE */
465
466	#ifdef USE_LOCALE_NUMERIC
467	new_numeric(curnum);
468	#endif /* USE_LOCALE_NUMERIC */
b310b053	469
98994639 HS	470	}
	471
	472	#endif /* USE_LOCALE */
	473
b310b053 JH	474	{
	475	bool wantutf8 = FALSE;
	476	char *codeset = NULL;
	477	#if defined(HAS_NL_LANGINFO) && defined(CODESET)
	478	codeset = nl_langinfo(CODESET);
	479	#endif
	480	if (codeset &&
	481	(ibcmp(codeset, "UTF-8", 5) == 0 \|\|
	482	ibcmp(codeset, "UTF8", 4) == 0))
	483	wantutf8 = TRUE;
077a72a9	484	#if defined(USE_LOCALE)
b310b053 JH	485	#ifdef __GLIBC__
	486	if (!wantutf8 && language &&
	487	(ibcmp(language, "UTF-8", 5) == 0 \|\|
	488	ibcmp(language, "UTF8", 4) == 0))
	489	wantutf8 = TRUE;
	490	#endif
	491	if (!wantutf8 && lc_all &&
	492	(ibcmp(lc_all, "UTF-8", 5) == 0 \|\|
	493	ibcmp(lc_all, "UTF8", 4) == 0))
	494	wantutf8 = TRUE;
	495	#ifdef USE_LOCALE_CTYPE
	496	if (!wantutf8 && curctype &&
	497	(ibcmp(curctype, "UTF-8", 5) == 0 \|\|
	498	ibcmp(curctype, "UTF8", 4) == 0))
	499	wantutf8 = TRUE;
	500	#endif
	501	if (!wantutf8 && lang &&
	502	(ibcmp(lang, "UTF-8", 5) == 0 \|\|
	503	ibcmp(lang, "UTF8", 4) == 0))
	504	wantutf8 = TRUE;
077a72a9	505	#endif /* USE_LOCALE */
b310b053 JH	506	if (wantutf8)
	507	PL_wantutf8 = TRUE;
	508	}
	509
98994639 HS	510	#ifdef USE_LOCALE_CTYPE
	511	if (curctype != NULL)
	512	Safefree(curctype);
	513	#endif /* USE_LOCALE_CTYPE */
	514	#ifdef USE_LOCALE_COLLATE
	515	if (curcoll != NULL)
	516	Safefree(curcoll);
	517	#endif /* USE_LOCALE_COLLATE */
	518	#ifdef USE_LOCALE_NUMERIC
	519	if (curnum != NULL)
	520	Safefree(curnum);
	521	#endif /* USE_LOCALE_NUMERIC */
	522	return ok;
	523	}
	524
	525	/* Backwards compatibility. */
	526	int
	527	Perl_init_i18nl14n(pTHX_ int printwarn)
	528	{
	529	return init_i18nl10n(printwarn);
	530	}
	531
	532	#ifdef USE_LOCALE_COLLATE
	533
	534	/*
	535	* mem_collxfrm() is a bit like strxfrm() but with two important
	536	* differences. First, it handles embedded NULs. Second, it allocates
	537	* a bit more memory than needed for the transformed data itself.
	538	* The real transformed data begins at offset sizeof(collationix).
	539	* Please see sv_collxfrm() to see how this is used.
	540	*/
	541	char *
	542	Perl_mem_collxfrm(pTHX_ const char s, STRLEN len, STRLEN xlen)
	543	{
	544	char *xbuf;
	545	STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
	546
	547	/* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
	548	/* the +1 is for the terminating NUL. */
	549
	550	xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
	551	New(171, xbuf, xAlloc, char);
	552	if (! xbuf)
	553	goto bad;
	554
	555	(U32)xbuf = PL_collation_ix;
	556	xout = sizeof(PL_collation_ix);
	557	for (xin = 0; xin < len; ) {
	558	SSize_t xused;
	559
	560	for (;;) {
	561	xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
	562	if (xused == -1)
	563	goto bad;
eb160463	564	if ((STRLEN)xused < xAlloc - xout)
98994639 HS	565	break;
	566	xAlloc = (2 * xAlloc) + 1;
	567	Renew(xbuf, xAlloc, char);
	568	if (! xbuf)
	569	goto bad;
	570	}
	571
	572	xin += strlen(s + xin) + 1;
	573	xout += xused;
	574
	575	/* Embedded NULs are understood but silently skipped
	576	* because they make no sense in locale collation. */
	577	}
	578
	579	xbuf[xout] = '\0';
	580	*xlen = xout - sizeof(PL_collation_ix);
	581	return xbuf;
	582
	583	bad:
	584	Safefree(xbuf);
	585	*xlen = 0;
	586	return NULL;
	587	}
	588
	589	#endif /* USE_LOCALE_COLLATE */
	590