[perl5.git] / ext / Encode / Encode.xs

/*
 $Id: Encode.xs,v 1.44 2002/05/02 07:33:09 dankogai Exp $
 */

#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#define U8 U8
#include "encode.h"

# define PERLIO_MODNAME  "PerlIO::encoding"
# define PERLIO_FILENAME "PerlIO/encoding.pm"

/* set 1 or more to profile.  t/encoding.t dumps core because of
   Perl_warner and PerlIO don't work well */
#define ENCODE_XS_PROFILE 0

/* set 0 to disable floating point to calculate buffer size for
   encode_method().  1 is recommended. 2 restores NI-S original */
#define ENCODE_XS_USEFP   1

#define UNIMPLEMENTED(x,y) y x (SV *sv, char *encoding) {dTHX;   \
                         Perl_croak(aTHX_ "panic_unimplemented"); \
			 return (y)0; /* fool picky compilers */ \
                         }
/**/

UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)

void
Encode_XSEncoding(pTHX_ encode_t * enc)
{
    dSP;
    HV *stash = gv_stashpv("Encode::XS", TRUE);
    SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))), stash);
    int i = 0;
    PUSHMARK(sp);
    XPUSHs(sv);
    while (enc->name[i]) {
	const char *name = enc->name[i++];
	XPUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
    }
    PUTBACK;
    call_pv("Encode::define_encoding", G_DISCARD);
    SvREFCNT_dec(sv);
}

void
call_failure(SV * routine, U8 * done, U8 * dest, U8 * orig)
{
    /* Exists for breakpointing */
}


#define ERR_ENCODE_NOMAP "\"\\x{%04" UVxf "}\" does not map to %s"
#define ERR_DECODE_NOMAP "%s \"\\x%02" UVXf "\" does not map to Unicode"

static SV *
encode_method(pTHX_ encode_t * enc, encpage_t * dir, SV * src,
	      int check)
{
    STRLEN slen;
    U8 *s = (U8 *) SvPV(src, slen);
    STRLEN tlen  = slen;
    STRLEN ddone = 0;
    STRLEN sdone = 0;

    /* We allocate slen+1.
       PerlIO dumps core if this value is smaller than this. */
    SV *dst = sv_2mortal(newSV(slen+1));
    U8 *d = (U8 *)SvPVX(dst);
    STRLEN dlen = SvLEN(dst)-1;
    int code;

    if (!slen){
	SvCUR_set(dst, 0);
	SvPOK_only(dst);
	goto ENCODE_END;
    }

    while (code = do_encode(dir, s, &slen, d, dlen, &dlen, !check))
    {
	SvCUR_set(dst, dlen+ddone);
	SvPOK_only(dst);
	
	if (code == ENCODE_FALLBACK || code == ENCODE_PARTIAL){
	    break;
	}
	switch (code) {
	case ENCODE_NOSPACE:
	{	
	    STRLEN more = 0; /* make sure you initialize! */
	    STRLEN sleft;
	    sdone += slen;
	    ddone += dlen;
	    sleft = tlen - sdone;
#if ENCODE_XS_PROFILE >= 2
	    Perl_warn(aTHX_
		      "more=%d, sdone=%d, sleft=%d, SvLEN(dst)=%d\n",
		      more, sdone, sleft, SvLEN(dst));
#endif
	    if (sdone != 0) { /* has src ever been processed ? */
#if   ENCODE_XS_USEFP == 2
		more = (1.0*tlen*SvLEN(dst)+sdone-1)/sdone
		    - SvLEN(dst);
#elif ENCODE_XS_USEFP
		more = (1.0*SvLEN(dst)+1)/sdone * sleft;
#else
		/* safe until SvLEN(dst) == MAX_INT/16 */
		more = (16*SvLEN(dst)+1)/sdone/16 * sleft;
#endif
	    }
	    more += UTF8_MAXLEN; /* insurance policy */
	    d = (U8 *) SvGROW(dst, SvLEN(dst) + more);
	    /* dst need to grow need MORE bytes! */
	    if (ddone >= SvLEN(dst)) {
		Perl_croak(aTHX_ "Destination couldn't be grown.");
	    }
	    dlen = SvLEN(dst)-ddone-1;
	    d   += ddone;
	    s   += slen;
	    slen = tlen-sdone;
	    continue;
	}
	case ENCODE_NOREP:
	    /* encoding */	
	    if (dir == enc->f_utf8) {
		STRLEN clen;
		UV ch =
		    utf8n_to_uvuni(s+slen, (SvCUR(src)-slen),
				   &clen, UTF8_ALLOW_ANY|UTF8_CHECK_ONLY);
		if (check & ENCODE_DIE_ON_ERR) {
		    Perl_croak(aTHX_ ERR_ENCODE_NOMAP,
			       (UV)ch, enc->name[0]);
		    return &PL_sv_undef; /* never reaches but be safe */
		}
		if (check & ENCODE_WARN_ON_ERR){
		    Perl_warner(aTHX_ packWARN(WARN_UTF8),
				ERR_ENCODE_NOMAP, (UV)ch, enc->name[0]);
		}
		if (check & ENCODE_RETURN_ON_ERR){
		    goto ENCODE_SET_SRC;
		}
		if (check & ENCODE_PERLQQ){
		    SV* perlqq = 
			sv_2mortal(newSVpvf("\\x{%04"UVxf"}", (UV)ch));
		    sdone += slen + clen;
		    ddone += dlen + SvCUR(perlqq);
		    sv_catsv(dst, perlqq);
		}else if (check & ENCODE_HTMLCREF){
		    SV* htmlcref = 
			sv_2mortal(newSVpvf("&#%" UVuf ";", (UV)ch));
		    sdone += slen + clen;
		    ddone += dlen + SvCUR(htmlcref);
		    sv_catsv(dst, htmlcref);
		}else if (check & ENCODE_XMLCREF){
		    SV* xmlcref = 
			sv_2mortal(newSVpvf("&#x%" UVxf ";", (UV)ch));
		    sdone += slen + clen;
		    ddone += dlen + SvCUR(xmlcref);
		    sv_catsv(dst, xmlcref);
		} else {
		    /* fallback char */
		    sdone += slen + clen;
		    ddone += dlen + enc->replen;
		    sv_catpvn(dst, (char*)enc->rep, enc->replen);
		}
	    }
	    /* decoding */
	    else {
		if (check & ENCODE_DIE_ON_ERR){
		    Perl_croak(aTHX_ ERR_DECODE_NOMAP,
			       (UV)enc->name[0], (U8)s[slen]);
		    return &PL_sv_undef; /* never reaches but be safe */
		}
		if (check & ENCODE_WARN_ON_ERR){
		    Perl_warner(
			aTHX_ packWARN(WARN_UTF8),
			ERR_DECODE_NOMAP,
			(UV)enc->name[0], (U8)s[slen]);
		}
		if (check & ENCODE_RETURN_ON_ERR){
		    goto ENCODE_SET_SRC;
		}
		if (check &
		    (ENCODE_PERLQQ|ENCODE_HTMLCREF|ENCODE_XMLCREF)){
		    SV* perlqq = 
			sv_2mortal(newSVpvf("\\x%02" UVXf, (UV)s[slen]));
		    sdone += slen + 1;
		    ddone += dlen + SvCUR(perlqq);
		    sv_catsv(dst, perlqq);
		} else {
		    sdone += slen + 1;
		    ddone += dlen + strlen(FBCHAR_UTF8);
		    sv_catpv(dst, FBCHAR_UTF8);
		}
	    }
	    /* settle variables when fallback */
	    d    = (U8 *)SvEND(dst);
            dlen = SvLEN(dst) - ddone - 1;
	    s    = (U8*)SvPVX(src) + sdone;
	    slen = tlen - sdone;
	    break;

	default:
	    Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
		       code, (dir == enc->f_utf8) ? "to" : "from",
		       enc->name[0]);
	    return &PL_sv_undef;
	}
    }
 ENCODE_SET_SRC:
    if (check && !(check & ENCODE_LEAVE_SRC)){
	sdone = SvCUR(src) - (slen+sdone);
	if (sdone) {
	    sv_setpvn(src, (char*)s+slen, sdone);
	}
	SvCUR_set(src, sdone);
    }
    /* warn("check = 0x%X, code = 0x%d\n", check, code); */

    SvCUR_set(dst, dlen+ddone);
    SvPOK_only(dst);

#if ENCODE_XS_PROFILE
    if (SvCUR(dst) > SvCUR(src)){
	Perl_warn(aTHX_
		  "SvLEN(dst)=%d, SvCUR(dst)=%d. %d bytes unused(%f %%)\n",
		  SvLEN(dst), SvCUR(dst), SvLEN(dst) - SvCUR(dst),
		  (SvLEN(dst) - SvCUR(dst))*1.0/SvLEN(dst)*100.0);
    }
#endif

 ENCODE_END:
    *SvEND(dst) = '\0';
    return dst;
}

MODULE = Encode		PACKAGE = Encode::XS	PREFIX = Method_

PROTOTYPES: ENABLE

void
Method_name(obj)
SV *	obj
CODE:
{
    encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
    ST(0) = sv_2mortal(newSVpvn(enc->name[0],strlen(enc->name[0])));
    XSRETURN(1);
}

void
Method_decode(obj,src,check = 0)
SV *	obj
SV *	src
int	check
CODE:
{
    encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
    ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
    SvUTF8_on(ST(0));
    XSRETURN(1);
}

void
Method_encode(obj,src,check = 0)
SV *	obj
SV *	src
int	check
CODE:
{
    encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
    sv_utf8_upgrade(src);
    ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
    XSRETURN(1);
}

void
Method_needs_lines(obj)
SV *	obj
CODE:
{
    encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
    ST(0) = &PL_sv_no;
    XSRETURN(1);
}

void
Method_perlio_ok(obj)
SV *	obj
CODE:
{
    encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
    /* require_pv(PERLIO_FILENAME); */

    eval_pv("require PerlIO::encoding", 0);

    if (SvTRUE(get_sv("@", 0))) {
	ST(0) = &PL_sv_no;
    }else{
	ST(0) = &PL_sv_yes;
    }
    XSRETURN(1);
}

MODULE = Encode         PACKAGE = Encode

PROTOTYPES: ENABLE

I32
_bytes_to_utf8(sv, ...)
SV *    sv
CODE:
{
    SV * encoding = items == 2 ? ST(1) : Nullsv;

    if (encoding)
    RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
    else {
	STRLEN len;
	U8*    s = (U8*)SvPV(sv, len);
	U8*    converted;

	converted = bytes_to_utf8(s, &len); /* This allocs */
	sv_setpvn(sv, (char *)converted, len);
	SvUTF8_on(sv); /* XXX Should we? */
	Safefree(converted);                /* ... so free it */
	RETVAL = len;
    }
}
OUTPUT:
    RETVAL

I32
_utf8_to_bytes(sv, ...)
SV *    sv
CODE:
{
    SV * to    = items > 1 ? ST(1) : Nullsv;
    SV * check = items > 2 ? ST(2) : Nullsv;

    if (to) {
	RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
    } else {
	STRLEN len;
	U8 *s = (U8*)SvPV(sv, len);

	RETVAL = 0;
	if (SvTRUE(check)) {
	    /* Must do things the slow way */
	    U8 *dest;
            /* We need a copy to pass to check() */
	    U8 *src  = (U8*)savepv((char *)s);
	    U8 *send = s + len;

	    New(83, dest, len, U8); /* I think */

	    while (s < send) {
                if (*s < 0x80){
		    *dest++ = *s++;
                } else {
		    STRLEN ulen;
		    UV uv = *s++;

		    /* Have to do it all ourselves because of error routine,
		       aargh. */
		    if (!(uv & 0x40)){ goto failure; }
		    if      (!(uv & 0x20)) { ulen = 2;  uv &= 0x1f; }
		    else if (!(uv & 0x10)) { ulen = 3;  uv &= 0x0f; }
		    else if (!(uv & 0x08)) { ulen = 4;  uv &= 0x07; }
		    else if (!(uv & 0x04)) { ulen = 5;  uv &= 0x03; }
		    else if (!(uv & 0x02)) { ulen = 6;  uv &= 0x01; }
		    else if (!(uv & 0x01)) { ulen = 7;  uv = 0; }
		    else                   { ulen = 13; uv = 0; }
		
		    /* Note change to utf8.c variable naming, for variety */
		    while (ulen--) {
			if ((*s & 0xc0) != 0x80){
			    goto failure;
			} else {
			    uv = (uv << 6) | (*s++ & 0x3f);
			}
		  }
		  if (uv > 256) {
		  failure:
		      call_failure(check, s, dest, src);
		      /* Now what happens? */
		  }
		  *dest++ = (U8)uv;
		}
	    }
	} else {
	    RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
	}
    }
}
OUTPUT:
    RETVAL

bool
is_utf8(sv, check = 0)
SV *	sv
int	check
CODE:
{
    if (SvGMAGICAL(sv)) /* it could be $1, for example */
	sv = newSVsv(sv); /* GMAGIG will be done */
    if (SvPOK(sv)) {
	RETVAL = SvUTF8(sv) ? TRUE : FALSE;
	if (RETVAL &&
	    check  &&
	    !is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
	    RETVAL = FALSE;
    } else {
	RETVAL = FALSE;
    }
    if (sv != ST(0))
	SvREFCNT_dec(sv); /* it was a temp copy */
}
OUTPUT:
    RETVAL

SV *
_utf8_on(sv)
SV *	sv
CODE:
{
    if (SvPOK(sv)) {
	SV *rsv = newSViv(SvUTF8(sv));
	RETVAL = rsv;
	SvUTF8_on(sv);
    } else {
	RETVAL = &PL_sv_undef;
    }
}
OUTPUT:
    RETVAL

SV *
_utf8_off(sv)
SV *	sv
CODE:
{
    if (SvPOK(sv)) {
	SV *rsv = newSViv(SvUTF8(sv));
	RETVAL = rsv;
	SvUTF8_off(sv);
    } else {
	RETVAL = &PL_sv_undef;
    }
}
OUTPUT:
    RETVAL

int
DIE_ON_ERR()
CODE:
    RETVAL = ENCODE_DIE_ON_ERR;
OUTPUT:
    RETVAL

int
WARN_ON_ERR()
CODE:
    RETVAL = ENCODE_WARN_ON_ERR;
OUTPUT:
    RETVAL

int
LEAVE_SRC()
CODE:
    RETVAL = ENCODE_LEAVE_SRC;
OUTPUT:
    RETVAL

int
RETURN_ON_ERR()
CODE:
    RETVAL = ENCODE_RETURN_ON_ERR;
OUTPUT:
    RETVAL

int
PERLQQ()
CODE:
    RETVAL = ENCODE_PERLQQ;
OUTPUT:
    RETVAL

int
HTMLCREF()
CODE:
    RETVAL = ENCODE_HTMLCREF;
OUTPUT:
    RETVAL

int
XMLCREF()
CODE:
    RETVAL = ENCODE_XMLCREF;
OUTPUT:
    RETVAL

int
FB_DEFAULT()
CODE:
    RETVAL = ENCODE_FB_DEFAULT;
OUTPUT:
    RETVAL

int
FB_CROAK()
CODE:
    RETVAL = ENCODE_FB_CROAK;
OUTPUT:
    RETVAL

int
FB_QUIET()
CODE:
    RETVAL = ENCODE_FB_QUIET;
OUTPUT:
    RETVAL

int
FB_WARN()
CODE:
    RETVAL = ENCODE_FB_WARN;
OUTPUT:
    RETVAL

int
FB_PERLQQ()
CODE:
    RETVAL = ENCODE_FB_PERLQQ;
OUTPUT:
    RETVAL

int
FB_HTMLCREF()
CODE:
    RETVAL = ENCODE_FB_HTMLCREF;
OUTPUT:
    RETVAL

int
FB_XMLCREF()
CODE:
    RETVAL = ENCODE_FB_XMLCREF;
OUTPUT:
    RETVAL

BOOT:
{
#include "def_t.h"
#include "def_t.exh"
}
Commit	Line	Data
85982a32	1	/*
2fc614e0	2	$Id: Encode.xs,v 1.44 2002/05/02 07:33:09 dankogai Exp $
85982a32 JH	3	*/
85982a32 JH	4
fcf2db38	5	#define PERL_NO_GET_CONTEXT
2c674647 JH	6	#include "EXTERN.h"
	7	#include "perl.h"
	8	#include "XSUB.h"
2f2b4ff2 NIS	9	#define U8 U8
2f2b4ff2 NIS	10	#include "encode.h"
10c5ecbb JH	11
10c5ecbb JH	12	# define PERLIO_MODNAME "PerlIO::encoding"
0ab8f81e	13	# define PERLIO_FILENAME "PerlIO/encoding.pm"
aae85ceb	14
85982a32 JH	15	/* set 1 or more to profile. t/encoding.t dumps core because of
85982a32 JH	16	Perl_warner and PerlIO don't work well */
c6a7db43	17	#define ENCODE_XS_PROFILE 0
39cf9a5e	18
85982a32 JH	19	/* set 0 to disable floating point to calculate buffer size for
85982a32 JH	20	encode_method(). 1 is recommended. 2 restores NI-S original */
c6a7db43	21	#define ENCODE_XS_USEFP 1
39cf9a5e	22
fcf2db38	23	#define UNIMPLEMENTED(x,y) y x (SV sv, char encoding) {dTHX; \
2f5768b8	24	Perl_croak(aTHX_ "panic_unimplemented"); \
4a83738a	25	return (y)0; /* fool picky compilers */ \
87714904	26	}
85982a32	27	/**/
011b2d2f	28
7e9a885a JH	29	UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
7e9a885a JH	30	UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)
33af2bc7	31
b0b300a3	32	void
aa0053b7	33	Encode_XSEncoding(pTHX_ encode_t * enc)
2f2b4ff2	34	{
aa0053b7 NIS	35	dSP;
	36	HV *stash = gv_stashpv("Encode::XS", TRUE);
	37	SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))), stash);
	38	int i = 0;
	39	PUSHMARK(sp);
	40	XPUSHs(sv);
	41	while (enc->name[i]) {
	42	const char *name = enc->name[i++];
	43	XPUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
	44	}
	45	PUTBACK;
	46	call_pv("Encode::define_encoding", G_DISCARD);
	47	SvREFCNT_dec(sv);
2f2b4ff2 NIS	48	}
2f2b4ff2 NIS	49
aa0053b7 NIS	50	void
	51	call_failure(SV * routine, U8 * done, U8 * dest, U8 * orig)
	52	{
85982a32	53	/* Exists for breakpointing */
aa0053b7	54	}
67e989fb	55
85982a32	56
2fc614e0 JH	57	#define ERR_ENCODE_NOMAP "\"\\x{%04" UVxf "}\" does not map to %s"
	58	#define ERR_DECODE_NOMAP "%s \"\\x%02" UVXf "\" does not map to Unicode"
	59
2f2b4ff2	60	static SV *
aa0053b7	61	encode_method(pTHX_ encode_t * enc, encpage_t * dir, SV * src,
85982a32	62	int check)
2f2b4ff2	63	{
aa0053b7 NIS	64	STRLEN slen;
aa0053b7 NIS	65	U8 s = (U8 ) SvPV(src, slen);
3aececda NIS	66	STRLEN tlen = slen;
	67	STRLEN ddone = 0;
	68	STRLEN sdone = 0;
39cf9a5e	69
3c49ab08	70	/* We allocate slen+1.
85982a32	71	PerlIO dumps core if this value is smaller than this. */
3c49ab08	72	SV *dst = sv_2mortal(newSV(slen+1));
85982a32 JH	73	U8 d = (U8 )SvPVX(dst);
	74	STRLEN dlen = SvLEN(dst)-1;
	75	int code;
	76
	77	if (!slen){
	78	SvCUR_set(dst, 0);
	79	SvPOK_only(dst);
	80	goto ENCODE_END;
	81	}
	82
	83	while (code = do_encode(dir, s, &slen, d, dlen, &dlen, !check))
	84	{
	85	SvCUR_set(dst, dlen+ddone);
	86	SvPOK_only(dst);
0b3236bb	87
85982a32 JH	88	if (code == ENCODE_FALLBACK \|\| code == ENCODE_PARTIAL){
	89	break;
	90	}
	91	switch (code) {
	92	case ENCODE_NOSPACE:
	93	{
	94	STRLEN more = 0; /* make sure you initialize! */
	95	STRLEN sleft;
	96	sdone += slen;
	97	ddone += dlen;
	98	sleft = tlen - sdone;
fcb875d4	99	#if ENCODE_XS_PROFILE >= 2
85982a32 JH	100	Perl_warn(aTHX_
	101	"more=%d, sdone=%d, sleft=%d, SvLEN(dst)=%d\n",
	102	more, sdone, sleft, SvLEN(dst));
fcb875d4	103	#endif
85982a32	104	if (sdone != 0) { /* has src ever been processed ? */
39cf9a5e	105	#if ENCODE_XS_USEFP == 2
85982a32 JH	106	more = (1.0tlenSvLEN(dst)+sdone-1)/sdone
85982a32 JH	107	- SvLEN(dst);
39cf9a5e	108	#elif ENCODE_XS_USEFP
85982a32	109	more = (1.0SvLEN(dst)+1)/sdone sleft;
39cf9a5e	110	#else
85982a32 JH	111	/* safe until SvLEN(dst) == MAX_INT/16 */
85982a32 JH	112	more = (16SvLEN(dst)+1)/sdone/16 sleft;
39cf9a5e	113	#endif
39cf9a5e	114	}
85982a32 JH	115	more += UTF8_MAXLEN; /* insurance policy */
	116	d = (U8 *) SvGROW(dst, SvLEN(dst) + more);
	117	/* dst need to grow need MORE bytes! */
	118	if (ddone >= SvLEN(dst)) {
	119	Perl_croak(aTHX_ "Destination couldn't be grown.");
	120	}
	121	dlen = SvLEN(dst)-ddone-1;
	122	d += ddone;
	123	s += slen;
	124	slen = tlen-sdone;
	125	continue;
	126	}
	127	case ENCODE_NOREP:
	128	/* encoding */
c6a7db43	129	if (dir == enc->f_utf8) {
85982a32 JH	130	STRLEN clen;
85982a32 JH	131	UV ch =
3e952a88	132	utf8n_to_uvuni(s+slen, (SvCUR(src)-slen),
b0b300a3	133	&clen, UTF8_ALLOW_ANY\|UTF8_CHECK_ONLY);
85982a32	134	if (check & ENCODE_DIE_ON_ERR) {
2fc614e0 JH	135	Perl_croak(aTHX_ ERR_ENCODE_NOMAP,
2fc614e0 JH	136	(UV)ch, enc->name[0]);
4089adc4 JH	137	return &PL_sv_undef; /* never reaches but be safe */
	138	}
	139	if (check & ENCODE_WARN_ON_ERR){
	140	Perl_warner(aTHX_ packWARN(WARN_UTF8),
2fc614e0	141	ERR_ENCODE_NOMAP, (UV)ch, enc->name[0]);
4089adc4 JH	142	}
	143	if (check & ENCODE_RETURN_ON_ERR){
	144	goto ENCODE_SET_SRC;
	145	}
	146	if (check & ENCODE_PERLQQ){
	147	SV* perlqq =
	148	sv_2mortal(newSVpvf("\\x{%04"UVxf"}", (UV)ch));
	149	sdone += slen + clen;
	150	ddone += dlen + SvCUR(perlqq);
	151	sv_catsv(dst, perlqq);
	152	}else if (check & ENCODE_HTMLCREF){
	153	SV* htmlcref =
	154	sv_2mortal(newSVpvf("&#%" UVuf ";", (UV)ch));
	155	sdone += slen + clen;
	156	ddone += dlen + SvCUR(htmlcref);
	157	sv_catsv(dst, htmlcref);
	158	}else if (check & ENCODE_XMLCREF){
	159	SV* xmlcref =
	160	sv_2mortal(newSVpvf("&#x%" UVxf ";", (UV)ch));
	161	sdone += slen + clen;
	162	ddone += dlen + SvCUR(xmlcref);
	163	sv_catsv(dst, xmlcref);
	164	} else {
	165	/* fallback char */
	166	sdone += slen + clen;
	167	ddone += dlen + enc->replen;
	168	sv_catpvn(dst, (char*)enc->rep, enc->replen);
c6a7db43	169	}
b2704119	170	}
85982a32	171	/* decoding */
c6a7db43	172	else {
85982a32	173	if (check & ENCODE_DIE_ON_ERR){
2fc614e0 JH	174	Perl_croak(aTHX_ ERR_DECODE_NOMAP,
2fc614e0 JH	175	(UV)enc->name[0], (U8)s[slen]);
4089adc4 JH	176	return &PL_sv_undef; /* never reaches but be safe */
	177	}
	178	if (check & ENCODE_WARN_ON_ERR){
	179	Perl_warner(
	180	aTHX_ packWARN(WARN_UTF8),
2fc614e0 JH	181	ERR_DECODE_NOMAP,
2fc614e0 JH	182	(UV)enc->name[0], (U8)s[slen]);
4089adc4 JH	183	}
	184	if (check & ENCODE_RETURN_ON_ERR){
	185	goto ENCODE_SET_SRC;
	186	}
	187	if (check &
	188	(ENCODE_PERLQQ\|ENCODE_HTMLCREF\|ENCODE_XMLCREF)){
	189	SV* perlqq =
	190	sv_2mortal(newSVpvf("\\x%02" UVXf, (UV)s[slen]));
	191	sdone += slen + 1;
	192	ddone += dlen + SvCUR(perlqq);
	193	sv_catsv(dst, perlqq);
	194	} else {
	195	sdone += slen + 1;
	196	ddone += dlen + strlen(FBCHAR_UTF8);
	197	sv_catpv(dst, FBCHAR_UTF8);
aa0053b7	198	}
b2704119	199	}
85982a32	200	/* settle variables when fallback */
b0b300a3 JH	201	d = (U8 *)SvEND(dst);
b0b300a3 JH	202	dlen = SvLEN(dst) - ddone - 1;
3e952a88	203	s = (U8*)SvPVX(src) + sdone;
b2704119 JH	204	slen = tlen - sdone;
b2704119 JH	205	break;
2f2b4ff2	206
85982a32 JH	207	default:
	208	Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
	209	code, (dir == enc->f_utf8) ? "to" : "from",
	210	enc->name[0]);
	211	return &PL_sv_undef;
aa0053b7	212	}
85982a32 JH	213	}
85982a32 JH	214	ENCODE_SET_SRC:
ca777f1c NIS	215	if (check && !(check & ENCODE_LEAVE_SRC)){
ca777f1c NIS	216	sdone = SvCUR(src) - (slen+sdone);
85982a32 JH	217	if (sdone) {
85982a32 JH	218	sv_setpvn(src, (char*)s+slen, sdone);
aa0053b7	219	}
85982a32	220	SvCUR_set(src, sdone);
2f2b4ff2	221	}
85982a32	222	/* warn("check = 0x%X, code = 0x%d\n", check, code); */
c6a7db43	223
85982a32 JH	224	SvCUR_set(dst, dlen+ddone);
85982a32 JH	225	SvPOK_only(dst);
c6a7db43	226
39cf9a5e DK	227	#if ENCODE_XS_PROFILE
39cf9a5e DK	228	if (SvCUR(dst) > SvCUR(src)){
85982a32 JH	229	Perl_warn(aTHX_
	230	"SvLEN(dst)=%d, SvCUR(dst)=%d. %d bytes unused(%f %%)\n",
	231	SvLEN(dst), SvCUR(dst), SvLEN(dst) - SvCUR(dst),
	232	(SvLEN(dst) - SvCUR(dst))1.0/SvLEN(dst)100.0);
39cf9a5e	233	}
3c49ab08	234	#endif
c6a7db43	235
85982a32	236	ENCODE_END:
0b3236bb	237	*SvEND(dst) = '\0';
aa0053b7	238	return dst;
2f2b4ff2 NIS	239	}
2f2b4ff2 NIS	240
50d26985	241	MODULE = Encode PACKAGE = Encode::XS PREFIX = Method_
2f2b4ff2 NIS	242
	243	PROTOTYPES: ENABLE
	244
	245	void
0a95303c NIS	246	Method_name(obj)
	247	SV * obj
	248	CODE:
85982a32 JH	249	{
	250	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	251	ST(0) = sv_2mortal(newSVpvn(enc->name[0],strlen(enc->name[0])));
	252	XSRETURN(1);
	253	}
0a95303c NIS	254
0a95303c NIS	255	void
b2704119	256	Method_decode(obj,src,check = 0)
2f2b4ff2 NIS	257	SV * obj
2f2b4ff2 NIS	258	SV * src
b2704119	259	int check
2f2b4ff2	260	CODE:
aae85ceb	261	{
85982a32 JH	262	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	263	ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
	264	SvUTF8_on(ST(0));
aae85ceb DK	265	XSRETURN(1);
	266	}
	267
	268	void
85982a32	269	Method_encode(obj,src,check = 0)
aae85ceb	270	SV * obj
85982a32 JH	271	SV * src
85982a32 JH	272	int check
aae85ceb DK	273	CODE:
aae85ceb DK	274	{
85982a32 JH	275	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	276	sv_utf8_upgrade(src);
	277	ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
aae85ceb DK	278	XSRETURN(1);
	279	}
	280
0ab8f81e JH	281	void
	282	Method_needs_lines(obj)
	283	SV * obj
	284	CODE:
	285	{
	286	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	287	ST(0) = &PL_sv_no;
	288	XSRETURN(1);
	289	}
	290
	291	void
	292	Method_perlio_ok(obj)
	293	SV * obj
	294	CODE:
	295	{
	296	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
10c5ecbb JH	297	/* require_pv(PERLIO_FILENAME); */
	298
	299	eval_pv("require PerlIO::encoding", 0);
	300
	301	if (SvTRUE(get_sv("@", 0))) {
0ab8f81e	302	ST(0) = &PL_sv_no;
10c5ecbb JH	303	}else{
10c5ecbb JH	304	ST(0) = &PL_sv_yes;
0ab8f81e JH	305	}
	306	XSRETURN(1);
	307	}
	308
67e989fb	309	MODULE = Encode PACKAGE = Encode
2c674647 JH	310
	311	PROTOTYPES: ENABLE
	312
67e989fb	313	I32
2c674647	314	_bytes_to_utf8(sv, ...)
85982a32 JH	315	SV * sv
	316	CODE:
	317	{
	318	SV * encoding = items == 2 ? ST(1) : Nullsv;
c6a7db43	319
85982a32 JH	320	if (encoding)
	321	RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
	322	else {
	323	STRLEN len;
	324	U8* s = (U8*)SvPV(sv, len);
	325	U8* converted;
	326
	327	converted = bytes_to_utf8(s, &len); /* This allocs */
	328	sv_setpvn(sv, (char *)converted, len);
	329	SvUTF8_on(sv); /* XXX Should we? */
	330	Safefree(converted); /* ... so free it */
	331	RETVAL = len;
	332	}
	333	}
	334	OUTPUT:
	335	RETVAL
2c674647	336
67e989fb	337	I32
2c674647	338	_utf8_to_bytes(sv, ...)
85982a32 JH	339	SV * sv
	340	CODE:
	341	{
	342	SV * to = items > 1 ? ST(1) : Nullsv;
	343	SV * check = items > 2 ? ST(2) : Nullsv;
	344
	345	if (to) {
	346	RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
	347	} else {
	348	STRLEN len;
	349	U8 s = (U8)SvPV(sv, len);
	350
	351	RETVAL = 0;
	352	if (SvTRUE(check)) {
	353	/* Must do things the slow way */
	354	U8 *dest;
	355	/* We need a copy to pass to check() */
c6a7db43	356	U8 src = (U8)savepv((char *)s);
85982a32 JH	357	U8 *send = s + len;
	358
	359	New(83, dest, len, U8); /* I think */
	360
	361	while (s < send) {
	362	if (*s < 0x80){
	363	dest++ = s++;
	364	} else {
	365	STRLEN ulen;
	366	UV uv = *s++;
	367
	368	/* Have to do it all ourselves because of error routine,
	369	aargh. */
	370	if (!(uv & 0x40)){ goto failure; }
	371	if (!(uv & 0x20)) { ulen = 2; uv &= 0x1f; }
	372	else if (!(uv & 0x10)) { ulen = 3; uv &= 0x0f; }
	373	else if (!(uv & 0x08)) { ulen = 4; uv &= 0x07; }
	374	else if (!(uv & 0x04)) { ulen = 5; uv &= 0x03; }
	375	else if (!(uv & 0x02)) { ulen = 6; uv &= 0x01; }
	376	else if (!(uv & 0x01)) { ulen = 7; uv = 0; }
	377	else { ulen = 13; uv = 0; }
87714904	378
85982a32 JH	379	/* Note change to utf8.c variable naming, for variety */
85982a32 JH	380	while (ulen--) {
c6a7db43 NIS	381	if ((*s & 0xc0) != 0x80){
c6a7db43 NIS	382	goto failure;
85982a32 JH	383	} else {
	384	uv = (uv << 6) \| (*s++ & 0x3f);
	385	}
87714904	386	}
67e989fb JH	387	if (uv > 256) {
67e989fb JH	388	failure:
85982a32 JH	389	call_failure(check, s, dest, src);
85982a32 JH	390	/* Now what happens? */
67e989fb JH	391	}
67e989fb JH	392	*dest++ = (U8)uv;
85982a32 JH	393	}
	394	}
	395	} else {
	396	RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
2c674647	397	}
85982a32 JH	398	}
	399	}
	400	OUTPUT:
	401	RETVAL
2c674647	402
2c674647	403	bool
b2704119	404	is_utf8(sv, check = 0)
4411f3b6	405	SV * sv
b2704119	406	int check
85982a32 JH	407	CODE:
	408	{
	409	if (SvGMAGICAL(sv)) /* it could be $1, for example */
	410	sv = newSVsv(sv); /* GMAGIG will be done */
	411	if (SvPOK(sv)) {
	412	RETVAL = SvUTF8(sv) ? TRUE : FALSE;
	413	if (RETVAL &&
	414	check &&
	415	!is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
2c674647	416	RETVAL = FALSE;
85982a32 JH	417	} else {
	418	RETVAL = FALSE;
	419	}
	420	if (sv != ST(0))
	421	SvREFCNT_dec(sv); /* it was a temp copy */
	422	}
	423	OUTPUT:
	424	RETVAL
2c674647 JH	425
2c674647 JH	426	SV *
4411f3b6	427	_utf8_on(sv)
85982a32 JH	428	SV * sv
	429	CODE:
	430	{
	431	if (SvPOK(sv)) {
	432	SV *rsv = newSViv(SvUTF8(sv));
	433	RETVAL = rsv;
	434	SvUTF8_on(sv);
	435	} else {
	436	RETVAL = &PL_sv_undef;
	437	}
	438	}
	439	OUTPUT:
	440	RETVAL
2c674647 JH	441
2c674647 JH	442	SV *
4411f3b6	443	_utf8_off(sv)
85982a32 JH	444	SV * sv
	445	CODE:
	446	{
	447	if (SvPOK(sv)) {
	448	SV *rsv = newSViv(SvUTF8(sv));
	449	RETVAL = rsv;
	450	SvUTF8_off(sv);
	451	} else {
	452	RETVAL = &PL_sv_undef;
	453	}
	454	}
	455	OUTPUT:
	456	RETVAL
	457
85982a32 JH	458	int
	459	DIE_ON_ERR()
	460	CODE:
	461	RETVAL = ENCODE_DIE_ON_ERR;
	462	OUTPUT:
	463	RETVAL
	464
c6a7db43	465	int
85982a32 JH	466	WARN_ON_ERR()
	467	CODE:
	468	RETVAL = ENCODE_WARN_ON_ERR;
	469	OUTPUT:
	470	RETVAL
	471
	472	int
	473	LEAVE_SRC()
	474	CODE:
	475	RETVAL = ENCODE_LEAVE_SRC;
	476	OUTPUT:
	477	RETVAL
	478
	479	int
	480	RETURN_ON_ERR()
	481	CODE:
	482	RETVAL = ENCODE_RETURN_ON_ERR;
	483	OUTPUT:
	484	RETVAL
	485
	486	int
	487	PERLQQ()
	488	CODE:
	489	RETVAL = ENCODE_PERLQQ;
	490	OUTPUT:
	491	RETVAL
	492
	493	int
af1f55d9 JH	494	HTMLCREF()
	495	CODE:
	496	RETVAL = ENCODE_HTMLCREF;
	497	OUTPUT:
	498	RETVAL
	499
	500	int
	501	XMLCREF()
	502	CODE:
	503	RETVAL = ENCODE_XMLCREF;
	504	OUTPUT:
	505	RETVAL
	506
	507	int
85982a32 JH	508	FB_DEFAULT()
	509	CODE:
	510	RETVAL = ENCODE_FB_DEFAULT;
	511	OUTPUT:
	512	RETVAL
	513
	514	int
	515	FB_CROAK()
	516	CODE:
	517	RETVAL = ENCODE_FB_CROAK;
	518	OUTPUT:
	519	RETVAL
	520
	521	int
	522	FB_QUIET()
	523	CODE:
	524	RETVAL = ENCODE_FB_QUIET;
	525	OUTPUT:
	526	RETVAL
	527
	528	int
	529	FB_WARN()
	530	CODE:
	531	RETVAL = ENCODE_FB_WARN;
	532	OUTPUT:
	533	RETVAL
	534
	535	int
	536	FB_PERLQQ()
	537	CODE:
	538	RETVAL = ENCODE_FB_PERLQQ;
	539	OUTPUT:
	540	RETVAL
2c674647	541
af1f55d9 JH	542	int
	543	FB_HTMLCREF()
	544	CODE:
	545	RETVAL = ENCODE_FB_HTMLCREF;
	546	OUTPUT:
	547	RETVAL
	548
	549	int
	550	FB_XMLCREF()
	551	CODE:
	552	RETVAL = ENCODE_FB_XMLCREF;
	553	OUTPUT:
	554	RETVAL
	555
33af2bc7 NIS	556	BOOT:
33af2bc7 NIS	557	{
85982a32	558	#include "def_t.h"
e7cbefb8	559	#include "def_t.exh"
33af2bc7	560	}