[p5sagit/p5-mst-13.2.git] / ext / Encode / Encode.xs

/*
 $Id: Encode.xs,v 1.29 2002/04/19 05:36:43 dankogai Exp $
 */

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

/* 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 */
}


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_ "\"\\N{U+%" UVxf "}\" does not map to %s, %d",
			ch, enc->name[0], __LINE__);
		}else{
		    if (check & ENCODE_RETURN_ON_ERR){
			if (check & ENCODE_WARN_ON_ERR){
			    Perl_warner(
				aTHX_ packWARN(WARN_UTF8),
				"\"\\N{U+%" UVxf "}\" does not map to %s",
				ch,enc->name[0]);
			}
       			goto ENCODE_SET_SRC;
		    }else if (check & ENCODE_PERLQQ){
			SV* perlqq =
			    sv_2mortal(newSVpvf("\\x{%04x}", ch));
			sdone += slen + clen;
			ddone += dlen + SvCUR(perlqq);
			sv_catsv(dst, perlqq);
		    } 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_ "%s \"\\x%02X\" does not map to Unicode (%d)",
			enc->name[0], (U8) s[slen], code);
		}else{
		    if (check & ENCODE_RETURN_ON_ERR){
			if (check & ENCODE_WARN_ON_ERR){
			    Perl_warner(
				aTHX_ packWARN(WARN_UTF8),
				"%s \"\\x%02X\" does not map to Unicode (%d)",
				enc->name[0], (U8) s[slen], code);
			}
			goto ENCODE_SET_SRC;
		    }else if (check & ENCODE_PERLQQ){
			SV* perlqq =
			    sv_2mortal(newSVpvf("\\x%02X", 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); */
    if (code && !(check & ENCODE_RETURN_ON_ERR)) {
    	return &PL_sv_undef;
    }

    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);
}

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

PROTOTYPES: DISABLE


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
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

BOOT:
{
#include "def_t.h"
#include "def_t.exh"
}
Commit	Line	Data
85982a32	1	/*
	2	$Id: Encode.xs,v 1.29 2002/04/19 05:36:43 dankogai Exp $
	3	*/
	4
fcf2db38	5	#define PERL_NO_GET_CONTEXT
2c674647	6	#include "EXTERN.h"
	7	#include "perl.h"
	8	#include "XSUB.h"
2f2b4ff2	9	#define U8 U8
2f2b4ff2	10	#include "encode.h"
aae85ceb	11
85982a32	12	/* set 1 or more to profile. t/encoding.t dumps core because of
85982a32	13	Perl_warner and PerlIO don't work well */
c6a7db43	14	#define ENCODE_XS_PROFILE 0
39cf9a5e	15
85982a32	16	/* set 0 to disable floating point to calculate buffer size for
85982a32	17	encode_method(). 1 is recommended. 2 restores NI-S original */
c6a7db43	18	#define ENCODE_XS_USEFP 1
39cf9a5e	19
fcf2db38	20	#define UNIMPLEMENTED(x,y) y x (SV sv, char encoding) {dTHX; \
2f5768b8	21	Perl_croak(aTHX_ "panic_unimplemented"); \
4a83738a	22	return (y)0; /* fool picky compilers */ \
87714904	23	}
85982a32	24	/**/
67e989fb	25	UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
85982a32	26	UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)
33af2bc7	27
85982a32	28	void
aa0053b7	29	Encode_XSEncoding(pTHX_ encode_t * enc)
2f2b4ff2	30	{
aa0053b7	31	dSP;
	32	HV *stash = gv_stashpv("Encode::XS", TRUE);
	33	SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))), stash);
	34	int i = 0;
	35	PUSHMARK(sp);
	36	XPUSHs(sv);
	37	while (enc->name[i]) {
	38	const char *name = enc->name[i++];
	39	XPUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
	40	}
	41	PUTBACK;
	42	call_pv("Encode::define_encoding", G_DISCARD);
	43	SvREFCNT_dec(sv);
2f2b4ff2	44	}
2f2b4ff2	45
aa0053b7	46	void
	47	call_failure(SV * routine, U8 * done, U8 * dest, U8 * orig)
	48	{
85982a32	49	/* Exists for breakpointing */
aa0053b7	50	}
67e989fb	51
85982a32	52
2f2b4ff2	53	static SV *
aa0053b7	54	encode_method(pTHX_ encode_t * enc, encpage_t * dir, SV * src,
85982a32	55	int check)
2f2b4ff2	56	{
aa0053b7	57	STRLEN slen;
aa0053b7	58	U8 s = (U8 ) SvPV(src, slen);
3aececda	59	STRLEN tlen = slen;
	60	STRLEN ddone = 0;
	61	STRLEN sdone = 0;
39cf9a5e	62
3c49ab08	63	/* We allocate slen+1.
85982a32	64	PerlIO dumps core if this value is smaller than this. */
3c49ab08	65	SV *dst = sv_2mortal(newSV(slen+1));
85982a32	66	U8 d = (U8 )SvPVX(dst);
	67	STRLEN dlen = SvLEN(dst)-1;
	68	int code;
	69
	70	if (!slen){
	71	SvCUR_set(dst, 0);
	72	SvPOK_only(dst);
	73	goto ENCODE_END;
	74	}
	75
	76	while (code = do_encode(dir, s, &slen, d, dlen, &dlen, !check))
	77	{
	78	SvCUR_set(dst, dlen+ddone);
	79	SvPOK_only(dst);
0b3236bb	80
85982a32	81	if (code == ENCODE_FALLBACK \|\| code == ENCODE_PARTIAL){
	82	break;
	83	}
	84	switch (code) {
	85	case ENCODE_NOSPACE:
	86	{
	87	STRLEN more = 0; /* make sure you initialize! */
	88	STRLEN sleft;
	89	sdone += slen;
	90	ddone += dlen;
	91	sleft = tlen - sdone;
fcb875d4	92	#if ENCODE_XS_PROFILE >= 2
85982a32	93	Perl_warn(aTHX_
	94	"more=%d, sdone=%d, sleft=%d, SvLEN(dst)=%d\n",
	95	more, sdone, sleft, SvLEN(dst));
fcb875d4	96	#endif
85982a32	97	if (sdone != 0) { /* has src ever been processed ? */
39cf9a5e	98	#if ENCODE_XS_USEFP == 2
85982a32	99	more = (1.0tlenSvLEN(dst)+sdone-1)/sdone
85982a32	100	- SvLEN(dst);
39cf9a5e	101	#elif ENCODE_XS_USEFP
85982a32	102	more = (1.0SvLEN(dst)+1)/sdone sleft;
39cf9a5e	103	#else
85982a32	104	/* safe until SvLEN(dst) == MAX_INT/16 */
85982a32	105	more = (16SvLEN(dst)+1)/sdone/16 sleft;
39cf9a5e	106	#endif
39cf9a5e	107	}
85982a32	108	more += UTF8_MAXLEN; /* insurance policy */
	109	d = (U8 *) SvGROW(dst, SvLEN(dst) + more);
	110	/* dst need to grow need MORE bytes! */
	111	if (ddone >= SvLEN(dst)) {
	112	Perl_croak(aTHX_ "Destination couldn't be grown.");
	113	}
	114	dlen = SvLEN(dst)-ddone-1;
	115	d += ddone;
	116	s += slen;
	117	slen = tlen-sdone;
	118	continue;
	119	}
	120	case ENCODE_NOREP:
	121	/* encoding */
c6a7db43	122	if (dir == enc->f_utf8) {
85982a32	123	STRLEN clen;
85982a32	124	UV ch =
c6a7db43	125	utf8n_to_uvuni(s+slen, (SvCUR(src)-slen), &clen, UTF8_ALLOW_ANY\|UTF8_CHECK_ONLY);
85982a32	126	if (check & ENCODE_DIE_ON_ERR) {
85982a32	127	Perl_croak(
c6a7db43	128	aTHX_ "\"\\N{U+%" UVxf "}\" does not map to %s, %d",
85982a32	129	ch, enc->name[0], __LINE__);
	130	}else{
	131	if (check & ENCODE_RETURN_ON_ERR){
	132	if (check & ENCODE_WARN_ON_ERR){
	133	Perl_warner(
	134	aTHX_ packWARN(WARN_UTF8),
c6a7db43	135	"\"\\N{U+%" UVxf "}\" does not map to %s",
85982a32	136	ch,enc->name[0]);
	137	}
	138	goto ENCODE_SET_SRC;
	139	}else if (check & ENCODE_PERLQQ){
c6a7db43	140	SV* perlqq =
85982a32	141	sv_2mortal(newSVpvf("\\x{%04x}", ch));
b2704119	142	sdone += slen + clen;
85982a32	143	ddone += dlen + SvCUR(perlqq);
85982a32	144	sv_catsv(dst, perlqq);
c6a7db43	145	} else {
85982a32	146	/* fallback char */
85982a32	147	sdone += slen + clen;
c6a7db43	148	ddone += dlen + enc->replen;
c6a7db43	149	sv_catpvn(dst, (char*)enc->rep, enc->replen);
b2704119	150	}
c6a7db43	151	}
b2704119	152	}
85982a32	153	/* decoding */
c6a7db43	154	else {
85982a32	155	if (check & ENCODE_DIE_ON_ERR){
	156	Perl_croak(
	157	aTHX_ "%s \"\\x%02X\" does not map to Unicode (%d)",
	158	enc->name[0], (U8) s[slen], code);
	159	}else{
	160	if (check & ENCODE_RETURN_ON_ERR){
	161	if (check & ENCODE_WARN_ON_ERR){
	162	Perl_warner(
	163	aTHX_ packWARN(WARN_UTF8),
	164	"%s \"\\x%02X\" does not map to Unicode (%d)",
	165	enc->name[0], (U8) s[slen], code);
	166	}
	167	goto ENCODE_SET_SRC;
	168	}else if (check & ENCODE_PERLQQ){
c6a7db43	169	SV* perlqq =
b2704119	170	sv_2mortal(newSVpvf("\\x%02X", s[slen]));
85982a32	171	sdone += slen + 1;
	172	ddone += dlen + SvCUR(perlqq);
	173	sv_catsv(dst, perlqq);
	174	} else {
	175	sdone += slen + 1;
c6a7db43	176	ddone += dlen + strlen(FBCHAR_UTF8);
c6a7db43	177	sv_catpv(dst, FBCHAR_UTF8);
85982a32	178	}
aa0053b7	179	}
b2704119	180	}
85982a32	181	/* settle variables when fallback */
0172fc7f	182	d = (U8*)SvEND(dst);
0172fc7f	183	dlen = SvLEN(dst)-ddone-1;
c6a7db43	184	s = (U8*)SvPVX(src) + sdone;
b2704119	185	slen = tlen - sdone;
b2704119	186	break;
2f2b4ff2	187
85982a32	188	default:
	189	Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
	190	code, (dir == enc->f_utf8) ? "to" : "from",
	191	enc->name[0]);
	192	return &PL_sv_undef;
aa0053b7	193	}
85982a32	194	}
85982a32	195	ENCODE_SET_SRC:
ca777f1c	196	if (check && !(check & ENCODE_LEAVE_SRC)){
ca777f1c	197	sdone = SvCUR(src) - (slen+sdone);
85982a32	198	if (sdone) {
85982a32	199	sv_setpvn(src, (char*)s+slen, sdone);
aa0053b7	200	}
85982a32	201	SvCUR_set(src, sdone);
2f2b4ff2	202	}
85982a32	203	/* warn("check = 0x%X, code = 0x%d\n", check, code); */
	204	if (code && !(check & ENCODE_RETURN_ON_ERR)) {
	205	return &PL_sv_undef;
2f2b4ff2	206	}
c6a7db43	207
85982a32	208	SvCUR_set(dst, dlen+ddone);
85982a32	209	SvPOK_only(dst);
c6a7db43	210
39cf9a5e	211	#if ENCODE_XS_PROFILE
39cf9a5e	212	if (SvCUR(dst) > SvCUR(src)){
85982a32	213	Perl_warn(aTHX_
	214	"SvLEN(dst)=%d, SvCUR(dst)=%d. %d bytes unused(%f %%)\n",
	215	SvLEN(dst), SvCUR(dst), SvLEN(dst) - SvCUR(dst),
	216	(SvLEN(dst) - SvCUR(dst))1.0/SvLEN(dst)100.0);
39cf9a5e	217	}
3c49ab08	218	#endif
c6a7db43	219
85982a32	220	ENCODE_END:
0b3236bb	221	*SvEND(dst) = '\0';
aa0053b7	222	return dst;
2f2b4ff2	223	}
2f2b4ff2	224
50d26985	225	MODULE = Encode PACKAGE = Encode::XS PREFIX = Method_
2f2b4ff2	226
	227	PROTOTYPES: ENABLE
	228
	229	void
0a95303c	230	Method_name(obj)
	231	SV * obj
	232	CODE:
85982a32	233	{
	234	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	235	ST(0) = sv_2mortal(newSVpvn(enc->name[0],strlen(enc->name[0])));
	236	XSRETURN(1);
	237	}
0a95303c	238
0a95303c	239	void
b2704119	240	Method_decode(obj,src,check = 0)
2f2b4ff2	241	SV * obj
2f2b4ff2	242	SV * src
b2704119	243	int check
2f2b4ff2	244	CODE:
aae85ceb	245	{
85982a32	246	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	247	ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
	248	SvUTF8_on(ST(0));
aae85ceb	249	XSRETURN(1);
	250	}
	251
	252	void
85982a32	253	Method_encode(obj,src,check = 0)
aae85ceb	254	SV * obj
85982a32	255	SV * src
85982a32	256	int check
aae85ceb	257	CODE:
aae85ceb	258	{
85982a32	259	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	260	sv_utf8_upgrade(src);
	261	ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
aae85ceb	262	XSRETURN(1);
	263	}
	264
67e989fb	265	MODULE = Encode PACKAGE = Encode
2c674647	266
	267	PROTOTYPES: ENABLE
	268
67e989fb	269	I32
2c674647	270	_bytes_to_utf8(sv, ...)
85982a32	271	SV * sv
	272	CODE:
	273	{
	274	SV * encoding = items == 2 ? ST(1) : Nullsv;
c6a7db43	275
85982a32	276	if (encoding)
	277	RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
	278	else {
	279	STRLEN len;
	280	U8* s = (U8*)SvPV(sv, len);
	281	U8* converted;
	282
	283	converted = bytes_to_utf8(s, &len); /* This allocs */
	284	sv_setpvn(sv, (char *)converted, len);
	285	SvUTF8_on(sv); /* XXX Should we? */
	286	Safefree(converted); /* ... so free it */
	287	RETVAL = len;
	288	}
	289	}
	290	OUTPUT:
	291	RETVAL
2c674647	292
67e989fb	293	I32
2c674647	294	_utf8_to_bytes(sv, ...)
85982a32	295	SV * sv
	296	CODE:
	297	{
	298	SV * to = items > 1 ? ST(1) : Nullsv;
	299	SV * check = items > 2 ? ST(2) : Nullsv;
	300
	301	if (to) {
	302	RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
	303	} else {
	304	STRLEN len;
	305	U8 s = (U8)SvPV(sv, len);
	306
	307	RETVAL = 0;
	308	if (SvTRUE(check)) {
	309	/* Must do things the slow way */
	310	U8 *dest;
	311	/* We need a copy to pass to check() */
c6a7db43	312	U8 src = (U8)savepv((char *)s);
85982a32	313	U8 *send = s + len;
	314
	315	New(83, dest, len, U8); /* I think */
	316
	317	while (s < send) {
	318	if (*s < 0x80){
	319	dest++ = s++;
	320	} else {
	321	STRLEN ulen;
	322	UV uv = *s++;
	323
	324	/* Have to do it all ourselves because of error routine,
	325	aargh. */
	326	if (!(uv & 0x40)){ goto failure; }
	327	if (!(uv & 0x20)) { ulen = 2; uv &= 0x1f; }
	328	else if (!(uv & 0x10)) { ulen = 3; uv &= 0x0f; }
	329	else if (!(uv & 0x08)) { ulen = 4; uv &= 0x07; }
	330	else if (!(uv & 0x04)) { ulen = 5; uv &= 0x03; }
	331	else if (!(uv & 0x02)) { ulen = 6; uv &= 0x01; }
	332	else if (!(uv & 0x01)) { ulen = 7; uv = 0; }
	333	else { ulen = 13; uv = 0; }
87714904	334
85982a32	335	/* Note change to utf8.c variable naming, for variety */
85982a32	336	while (ulen--) {
c6a7db43	337	if ((*s & 0xc0) != 0x80){
c6a7db43	338	goto failure;
85982a32	339	} else {
	340	uv = (uv << 6) \| (*s++ & 0x3f);
	341	}
87714904	342	}
67e989fb	343	if (uv > 256) {
67e989fb	344	failure:
85982a32	345	call_failure(check, s, dest, src);
85982a32	346	/* Now what happens? */
67e989fb	347	}
67e989fb	348	*dest++ = (U8)uv;
85982a32	349	}
	350	}
	351	} else {
	352	RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
2c674647	353	}
85982a32	354	}
	355	}
	356	OUTPUT:
	357	RETVAL
2c674647	358
2c674647	359	bool
b2704119	360	is_utf8(sv, check = 0)
4411f3b6	361	SV * sv
b2704119	362	int check
85982a32	363	CODE:
	364	{
	365	if (SvGMAGICAL(sv)) /* it could be $1, for example */
	366	sv = newSVsv(sv); /* GMAGIG will be done */
	367	if (SvPOK(sv)) {
	368	RETVAL = SvUTF8(sv) ? TRUE : FALSE;
	369	if (RETVAL &&
	370	check &&
	371	!is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
2c674647	372	RETVAL = FALSE;
85982a32	373	} else {
	374	RETVAL = FALSE;
	375	}
	376	if (sv != ST(0))
	377	SvREFCNT_dec(sv); /* it was a temp copy */
	378	}
	379	OUTPUT:
	380	RETVAL
2c674647	381
2c674647	382	SV *
4411f3b6	383	_utf8_on(sv)
85982a32	384	SV * sv
	385	CODE:
	386	{
	387	if (SvPOK(sv)) {
	388	SV *rsv = newSViv(SvUTF8(sv));
	389	RETVAL = rsv;
	390	SvUTF8_on(sv);
	391	} else {
	392	RETVAL = &PL_sv_undef;
	393	}
	394	}
	395	OUTPUT:
	396	RETVAL
2c674647	397
2c674647	398	SV *
4411f3b6	399	_utf8_off(sv)
85982a32	400	SV * sv
	401	CODE:
	402	{
	403	if (SvPOK(sv)) {
	404	SV *rsv = newSViv(SvUTF8(sv));
	405	RETVAL = rsv;
	406	SvUTF8_off(sv);
	407	} else {
	408	RETVAL = &PL_sv_undef;
	409	}
	410	}
	411	OUTPUT:
	412	RETVAL
	413
	414	PROTOTYPES: DISABLE
	415
	416
	417	int
	418	DIE_ON_ERR()
	419	CODE:
	420	RETVAL = ENCODE_DIE_ON_ERR;
	421	OUTPUT:
	422	RETVAL
	423
c6a7db43	424	int
85982a32	425	WARN_ON_ERR()
	426	CODE:
	427	RETVAL = ENCODE_WARN_ON_ERR;
	428	OUTPUT:
	429	RETVAL
	430
	431	int
	432	LEAVE_SRC()
	433	CODE:
	434	RETVAL = ENCODE_LEAVE_SRC;
	435	OUTPUT:
	436	RETVAL
	437
	438	int
	439	RETURN_ON_ERR()
	440	CODE:
	441	RETVAL = ENCODE_RETURN_ON_ERR;
	442	OUTPUT:
	443	RETVAL
	444
	445	int
	446	PERLQQ()
	447	CODE:
	448	RETVAL = ENCODE_PERLQQ;
	449	OUTPUT:
	450	RETVAL
	451
	452	int
	453	FB_DEFAULT()
	454	CODE:
	455	RETVAL = ENCODE_FB_DEFAULT;
	456	OUTPUT:
	457	RETVAL
	458
	459	int
	460	FB_CROAK()
	461	CODE:
	462	RETVAL = ENCODE_FB_CROAK;
	463	OUTPUT:
	464	RETVAL
	465
	466	int
	467	FB_QUIET()
	468	CODE:
	469	RETVAL = ENCODE_FB_QUIET;
	470	OUTPUT:
	471	RETVAL
	472
	473	int
	474	FB_WARN()
	475	CODE:
	476	RETVAL = ENCODE_FB_WARN;
	477	OUTPUT:
	478	RETVAL
	479
	480	int
	481	FB_PERLQQ()
	482	CODE:
	483	RETVAL = ENCODE_FB_PERLQQ;
	484	OUTPUT:
	485	RETVAL
2c674647	486
33af2bc7	487	BOOT:
33af2bc7	488	{
85982a32	489	#include "def_t.h"
e7cbefb8	490	#include "def_t.exh"
33af2bc7	491	}