[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

#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_wantutf8 to TRUE if using PerlIO _and_
	 any of the following are true:
	 - nl_langinfo(CODESET) contains /^utf-?8/i
	 - $ENV{LANGUAGE} contains /^utf-?8/i (only if using glibc)
	 - $ENV{LC_CALL} contains /^utf-?8/i
	 - $ENV{LC_CTYPE} contains /^utf-?8/i
	 - $ENV{LANG} contains /^utf-?8/i
	 If PL_wantutf8 is true, perl.c:S_parse_body()
	 will turn on the PerlIO :utf8 discipline on STDIN, STDOUT,
	 STDERR, _and_ the default open discipline.
      */
	 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;
    }
#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	*
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
a4af207c JH	32	#include "reentr.h"
a4af207c JH	33
98994639 HS	34	/*
	35	* Standardize the locale name from a string returned by 'setlocale'.
	36	*
	37	* The standard return value of setlocale() is either
	38	* (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
	39	* (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
	40	* (the space-separated values represent the various sublocales,
	41	* in some unspecificed order)
	42	*
	43	* In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
	44	* which is harmful for further use of the string in setlocale().
	45	*
	46	*/
	47	STATIC char *
	48	S_stdize_locale(pTHX_ char *locs)
	49	{
	50	char *s;
	51	bool okay = TRUE;
	52
	53	if ((s = strchr(locs, '='))) {
	54	char *t;
	55
	56	okay = FALSE;
	57	if ((t = strchr(s, '.'))) {
	58	char *u;
	59
	60	if ((u = strchr(t, '\n'))) {
	61
	62	if (u[1] == 0) {
	63	STRLEN len = u - s;
	64	Move(s + 1, locs, len, char);
	65	locs[len] = 0;
	66	okay = TRUE;
	67	}
	68	}
	69	}
	70	}
	71
	72	if (!okay)
	73	Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
	74
	75	return locs;
	76	}
	77
	78	void
	79	Perl_set_numeric_radix(pTHX)
	80	{
	81	#ifdef USE_LOCALE_NUMERIC
	82	# ifdef HAS_LOCALECONV
	83	struct lconv* lc;
	84
	85	lc = localeconv();
	86	if (lc && lc->decimal_point) {
	87	if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
	88	SvREFCNT_dec(PL_numeric_radix_sv);
	89	PL_numeric_radix_sv = Nullsv;
	90	}
	91	else {
	92	if (PL_numeric_radix_sv)
	93	sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
	94	else
	95	PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
	96	}
	97	}
98	else
99	PL_numeric_radix_sv = Nullsv;
100	# endif /* HAS_LOCALECONV */
101	#endif /* USE_LOCALE_NUMERIC */
102	}
103
104	/*
105	* Set up for a new numeric locale.
106	*/
107	void
108	Perl_new_numeric(pTHX_ char *newnum)
109	{
110	#ifdef USE_LOCALE_NUMERIC
111
112	if (! newnum) {
113	if (PL_numeric_name) {
114	Safefree(PL_numeric_name);
115	PL_numeric_name = NULL;
116	}
117	PL_numeric_standard = TRUE;
118	PL_numeric_local = TRUE;
119	return;
120	}
121
122	if (! PL_numeric_name \|\| strNE(PL_numeric_name, newnum)) {
123	Safefree(PL_numeric_name);
124	PL_numeric_name = stdize_locale(savepv(newnum));
125	PL_numeric_standard = (strEQ(newnum, "C") \|\| strEQ(newnum, "POSIX"));
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
167	Perl_new_ctype(pTHX_ char *newctype)
168	{
169	#ifdef USE_LOCALE_CTYPE
170
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 */
183	}
184
185	/*
186	* Set up for a new collation locale.
187	*/
188	void
189	Perl_new_collate(pTHX_ char *newcoll)
190	{
191	#ifdef USE_LOCALE_COLLATE
192
193	if (! newcoll) {
194	if (PL_collation_name) {
195	++PL_collation_ix;
196	Safefree(PL_collation_name);
197	PL_collation_name = NULL;
198	}
199	PL_collation_standard = TRUE;
200	PL_collxfrm_base = 0;
201	PL_collxfrm_mult = 2;
202	return;
203	}
204
205	if (! PL_collation_name \|\| strNE(PL_collation_name, newcoll)) {
206	++PL_collation_ix;
207	Safefree(PL_collation_name);
208	PL_collation_name = stdize_locale(savepv(newcoll));
209	PL_collation_standard = (strEQ(newcoll, "C") \|\| strEQ(newcoll, "POSIX"));
210
211	{
212	/* 2: at most so many chars ('a', 'b'). */
213	/* 50: surely no system expands a char more. */
214	#define XFRMBUFSIZE (2 * 50)
215	char xbuf[XFRMBUFSIZE];
216	Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
217	Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
218	SSize_t mult = fb - fa;
219	if (mult < 1)
220	Perl_croak(aTHX_ "strxfrm() gets absurd");
eb160463	221	PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
98994639 HS	222	PL_collxfrm_mult = mult;
	223	}
	224	}
	225
	226	#endif /* USE_LOCALE_COLLATE */
	227	}
	228
	229	/*
	230	* Initialize locale awareness.
	231	*/
	232	int
	233	Perl_init_i18nl10n(pTHX_ int printwarn)
	234	{
	235	int ok = 1;
	236	/* returns
	237	* 1 = set ok or not applicable,
	238	* 0 = fallback to C locale,
	239	* -1 = fallback to C locale failed
	240	*/
	241
	242	#if defined(USE_LOCALE)
	243
	244	#ifdef USE_LOCALE_CTYPE
	245	char *curctype = NULL;
	246	#endif /* USE_LOCALE_CTYPE */
	247	#ifdef USE_LOCALE_COLLATE
	248	char *curcoll = NULL;
	249	#endif /* USE_LOCALE_COLLATE */
	250	#ifdef USE_LOCALE_NUMERIC
	251	char *curnum = NULL;
	252	#endif /* USE_LOCALE_NUMERIC */
	253	#ifdef __GLIBC__
	254	char *language = PerlEnv_getenv("LANGUAGE");
	255	#endif
	256	char *lc_all = PerlEnv_getenv("LC_ALL");
	257	char *lang = PerlEnv_getenv("LANG");
	258	bool setlocale_failure = FALSE;
	259
	260	#ifdef LOCALE_ENVIRON_REQUIRED
	261
	262	/*
	263	* Ultrix setlocale(..., "") fails if there are no environment
	264	* variables from which to get a locale name.
	265	*/
	266
	267	bool done = FALSE;
	268
	269	#ifdef LC_ALL
	270	if (lang) {
	271	if (setlocale(LC_ALL, ""))
	272	done = TRUE;
	273	else
	274	setlocale_failure = TRUE;
	275	}
	276	if (!setlocale_failure) {
	277	#ifdef USE_LOCALE_CTYPE
	278	if (! (curctype =
	279	setlocale(LC_CTYPE,
	280	(!done && (lang \|\| PerlEnv_getenv("LC_CTYPE")))
	281	? "" : Nullch)))
	282	setlocale_failure = TRUE;
	283	else
	284	curctype = savepv(curctype);
	285	#endif /* USE_LOCALE_CTYPE */
286	#ifdef USE_LOCALE_COLLATE
287	if (! (curcoll =
288	setlocale(LC_COLLATE,
289	(!done && (lang \|\| PerlEnv_getenv("LC_COLLATE")))
290	? "" : Nullch)))
291	setlocale_failure = TRUE;
292	else
293	curcoll = savepv(curcoll);
294	#endif /* USE_LOCALE_COLLATE */
295	#ifdef USE_LOCALE_NUMERIC
296	if (! (curnum =
297	setlocale(LC_NUMERIC,
298	(!done && (lang \|\| PerlEnv_getenv("LC_NUMERIC")))
299	? "" : Nullch)))
300	setlocale_failure = TRUE;
301	else
302	curnum = savepv(curnum);
303	#endif /* USE_LOCALE_NUMERIC */
304	}
305
306	#endif /* LC_ALL */
307
308	#endif /* !LOCALE_ENVIRON_REQUIRED */
309
310	#ifdef LC_ALL
311	if (! setlocale(LC_ALL, ""))
312	setlocale_failure = TRUE;
313	#endif /* LC_ALL */
314
315	if (!setlocale_failure) {
316	#ifdef USE_LOCALE_CTYPE
317	if (! (curctype = setlocale(LC_CTYPE, "")))
318	setlocale_failure = TRUE;
319	else
320	curctype = savepv(curctype);
321	#endif /* USE_LOCALE_CTYPE */
322	#ifdef USE_LOCALE_COLLATE
323	if (! (curcoll = setlocale(LC_COLLATE, "")))
324	setlocale_failure = TRUE;
325	else
326	curcoll = savepv(curcoll);
327	#endif /* USE_LOCALE_COLLATE */
328	#ifdef USE_LOCALE_NUMERIC
329	if (! (curnum = setlocale(LC_NUMERIC, "")))
330	setlocale_failure = TRUE;
331	else
332	curnum = savepv(curnum);
333	#endif /* USE_LOCALE_NUMERIC */
334	}
335
336	if (setlocale_failure) {
337	char *p;
338	bool locwarn = (printwarn > 1 \|\|
339	(printwarn &&
340	(!(p = PerlEnv_getenv("PERL_BADLANG")) \|\| atoi(p))));
341
342	if (locwarn) {
343	#ifdef LC_ALL
344
345	PerlIO_printf(Perl_error_log,
346	"perl: warning: Setting locale failed.\n");
347
348	#else /* !LC_ALL */
349
350	PerlIO_printf(Perl_error_log,
351	"perl: warning: Setting locale failed for the categories:\n\t");
352	#ifdef USE_LOCALE_CTYPE
353	if (! curctype)
354	PerlIO_printf(Perl_error_log, "LC_CTYPE ");
355	#endif /* USE_LOCALE_CTYPE */
356	#ifdef USE_LOCALE_COLLATE
357	if (! curcoll)
358	PerlIO_printf(Perl_error_log, "LC_COLLATE ");
359	#endif /* USE_LOCALE_COLLATE */
360	#ifdef USE_LOCALE_NUMERIC
361	if (! curnum)
362	PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
363	#endif /* USE_LOCALE_NUMERIC */
364	PerlIO_printf(Perl_error_log, "\n");
365
366	#endif /* LC_ALL */
367
368	PerlIO_printf(Perl_error_log,
369	"perl: warning: Please check that your locale settings:\n");
370
371	#ifdef __GLIBC__
372	PerlIO_printf(Perl_error_log,
373	"\tLANGUAGE = %c%s%c,\n",
374	language ? '"' : '(',
375	language ? language : "unset",
376	language ? '"' : ')');
377	#endif
378
379	PerlIO_printf(Perl_error_log,
380	"\tLC_ALL = %c%s%c,\n",
381	lc_all ? '"' : '(',
382	lc_all ? lc_all : "unset",
383	lc_all ? '"' : ')');
384
385	#if defined(USE_ENVIRON_ARRAY)
386	{
387	char **e;
388	for (e = environ; *e; e++) {
389	if (strnEQ(*e, "LC_", 3)
390	&& strnNE(*e, "LC_ALL=", 7)
391	&& (p = strchr(*e, '=')))
392	PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
393	(int)(p - e), e, p + 1);
394	}
395	}
396	#else
397	PerlIO_printf(Perl_error_log,
398	"\t(possibly more locale environment variables)\n");
399	#endif
400
401	PerlIO_printf(Perl_error_log,
402	"\tLANG = %c%s%c\n",
403	lang ? '"' : '(',
404	lang ? lang : "unset",
405	lang ? '"' : ')');
406
407	PerlIO_printf(Perl_error_log,
408	" are supported and installed on your system.\n");
409	}
410
411	#ifdef LC_ALL
412
413	if (setlocale(LC_ALL, "C")) {
414	if (locwarn)
415	PerlIO_printf(Perl_error_log,
416	"perl: warning: Falling back to the standard locale (\"C\").\n");
417	ok = 0;
418	}
419	else {
420	if (locwarn)
421	PerlIO_printf(Perl_error_log,
422	"perl: warning: Failed to fall back to the standard locale (\"C\").\n");
423	ok = -1;
424	}
425
426	#else /* ! LC_ALL */
427
428	if (0
429	#ifdef USE_LOCALE_CTYPE
430	\|\| !(curctype \|\| setlocale(LC_CTYPE, "C"))
431	#endif /* USE_LOCALE_CTYPE */
432	#ifdef USE_LOCALE_COLLATE
433	\|\| !(curcoll \|\| setlocale(LC_COLLATE, "C"))
434	#endif /* USE_LOCALE_COLLATE */
435	#ifdef USE_LOCALE_NUMERIC
436	\|\| !(curnum \|\| setlocale(LC_NUMERIC, "C"))
437	#endif /* USE_LOCALE_NUMERIC */
438	)
439	{
440	if (locwarn)
441	PerlIO_printf(Perl_error_log,
442	"perl: warning: Cannot fall back to the standard locale (\"C\").\n");
443	ok = -1;
444	}
445
446	#endif /* ! LC_ALL */
447
448	#ifdef USE_LOCALE_CTYPE
449	curctype = savepv(setlocale(LC_CTYPE, Nullch));
450	#endif /* USE_LOCALE_CTYPE */
451	#ifdef USE_LOCALE_COLLATE
452	curcoll = savepv(setlocale(LC_COLLATE, Nullch));
453	#endif /* USE_LOCALE_COLLATE */
454	#ifdef USE_LOCALE_NUMERIC
455	curnum = savepv(setlocale(LC_NUMERIC, Nullch));
456	#endif /* USE_LOCALE_NUMERIC */
457	}
458	else {
459
460	#ifdef USE_LOCALE_CTYPE
461	new_ctype(curctype);
462	#endif /* USE_LOCALE_CTYPE */
463
464	#ifdef USE_LOCALE_COLLATE
465	new_collate(curcoll);
466	#endif /* USE_LOCALE_COLLATE */
467
468	#ifdef USE_LOCALE_NUMERIC
469	new_numeric(curnum);
470	#endif /* USE_LOCALE_NUMERIC */
b310b053	471
98994639 HS	472	}
	473
	474	#endif /* USE_LOCALE */
	475
ec71e770	476	#ifdef USE_PERLIO
b310b053	477	{
fca394fc	478	/* Set PL_wantutf8 to TRUE if using PerlIO _and_
ec71e770	479	any of the following are true:
085a54d9 JH	480	- nl_langinfo(CODESET) contains /^utf-?8/i
	481	- $ENV{LANGUAGE} contains /^utf-?8/i (only if using glibc)
	482	- $ENV{LC_CALL} contains /^utf-?8/i
	483	- $ENV{LC_CTYPE} contains /^utf-?8/i
	484	- $ENV{LANG} contains /^utf-?8/i
fca394fc	485	If PL_wantutf8 is true, perl.c:S_parse_body()
085a54d9 JH	486	will turn on the PerlIO :utf8 discipline on STDIN, STDOUT,
	487	STDERR, _and_ the default open discipline.
	488	*/
b310b053 JH	489	bool wantutf8 = FALSE;
	490	char *codeset = NULL;
	491	#if defined(HAS_NL_LANGINFO) && defined(CODESET)
	492	codeset = nl_langinfo(CODESET);
	493	#endif
	494	if (codeset &&
	495	(ibcmp(codeset, "UTF-8", 5) == 0 \|\|
	496	ibcmp(codeset, "UTF8", 4) == 0))
	497	wantutf8 = TRUE;
077a72a9	498	#if defined(USE_LOCALE)
b310b053 JH	499	#ifdef __GLIBC__
	500	if (!wantutf8 && language &&
	501	(ibcmp(language, "UTF-8", 5) == 0 \|\|
	502	ibcmp(language, "UTF8", 4) == 0))
	503	wantutf8 = TRUE;
	504	#endif
	505	if (!wantutf8 && lc_all &&
	506	(ibcmp(lc_all, "UTF-8", 5) == 0 \|\|
	507	ibcmp(lc_all, "UTF8", 4) == 0))
	508	wantutf8 = TRUE;
	509	#ifdef USE_LOCALE_CTYPE
	510	if (!wantutf8 && curctype &&
	511	(ibcmp(curctype, "UTF-8", 5) == 0 \|\|
	512	ibcmp(curctype, "UTF8", 4) == 0))
	513	wantutf8 = TRUE;
	514	#endif
	515	if (!wantutf8 && lang &&
	516	(ibcmp(lang, "UTF-8", 5) == 0 \|\|
	517	ibcmp(lang, "UTF8", 4) == 0))
	518	wantutf8 = TRUE;
077a72a9	519	#endif /* USE_LOCALE */
b310b053 JH	520	if (wantutf8)
	521	PL_wantutf8 = TRUE;
	522	}
ec71e770	523	#endif
b310b053	524
98994639 HS	525	#ifdef USE_LOCALE_CTYPE
	526	if (curctype != NULL)
	527	Safefree(curctype);
	528	#endif /* USE_LOCALE_CTYPE */
	529	#ifdef USE_LOCALE_COLLATE
	530	if (curcoll != NULL)
	531	Safefree(curcoll);
	532	#endif /* USE_LOCALE_COLLATE */
	533	#ifdef USE_LOCALE_NUMERIC
	534	if (curnum != NULL)
	535	Safefree(curnum);
	536	#endif /* USE_LOCALE_NUMERIC */
	537	return ok;
	538	}
	539
	540	/* Backwards compatibility. */
	541	int
	542	Perl_init_i18nl14n(pTHX_ int printwarn)
	543	{
	544	return init_i18nl10n(printwarn);
	545	}
	546
	547	#ifdef USE_LOCALE_COLLATE
	548
	549	/*
	550	* mem_collxfrm() is a bit like strxfrm() but with two important
	551	* differences. First, it handles embedded NULs. Second, it allocates
	552	* a bit more memory than needed for the transformed data itself.
	553	* The real transformed data begins at offset sizeof(collationix).
	554	* Please see sv_collxfrm() to see how this is used.
	555	*/
	556	char *
	557	Perl_mem_collxfrm(pTHX_ const char s, STRLEN len, STRLEN xlen)
	558	{
	559	char *xbuf;
	560	STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
	561
	562	/* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
	563	/* the +1 is for the terminating NUL. */
	564
	565	xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
	566	New(171, xbuf, xAlloc, char);
	567	if (! xbuf)
	568	goto bad;
	569
	570	(U32)xbuf = PL_collation_ix;
	571	xout = sizeof(PL_collation_ix);
	572	for (xin = 0; xin < len; ) {
	573	SSize_t xused;
	574
	575	for (;;) {
	576	xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
	577	if (xused == -1)
	578	goto bad;
eb160463	579	if ((STRLEN)xused < xAlloc - xout)
98994639 HS	580	break;
	581	xAlloc = (2 * xAlloc) + 1;
	582	Renew(xbuf, xAlloc, char);
	583	if (! xbuf)
	584	goto bad;
	585	}
	586
	587	xin += strlen(s + xin) + 1;
	588	xout += xused;
	589
	590	/* Embedded NULs are understood but silently skipped
	591	* because they make no sense in locale collation. */
	592	}
	593
	594	xbuf[xout] = '\0';
	595	*xlen = xout - sizeof(PL_collation_ix);
	596	return xbuf;
	597
	598	bad:
	599	Safefree(xbuf);
	600	*xlen = 0;
	601	return NULL;
	602	}
	603
	604	#endif /* USE_LOCALE_COLLATE */
	605