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

/*
 $Id: Encode.xs,v 1.33 2002/04/22 03:43:05 dankogai Exp $
 */

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


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);
}

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)));
    if (hv_exists(get_hv("INC", 0), 
		  PERLIO_FILENAME, strlen(PERLIO_FILENAME)))
    {
	ST(0) = &PL_sv_yes;
    }else{
	ST(0) = &PL_sv_no;
    }
    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	/*
0ab8f81e	2	$Id: Encode.xs,v 1.33 2002/04/22 03:43:05 dankogai Exp $
85982a32	3	*/
85982a32	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"
0ab8f81e	11	# define PERLIO_FILENAME "PerlIO/encoding.pm"
aae85ceb	12
85982a32	13	/* set 1 or more to profile. t/encoding.t dumps core because of
85982a32	14	Perl_warner and PerlIO don't work well */
0ab8f81e	15	#define ENCODE_XS_PROFILE 0
39cf9a5e	16
85982a32	17	/* set 0 to disable floating point to calculate buffer size for
85982a32	18	encode_method(). 1 is recommended. 2 restores NI-S original */
0ab8f81e	19	#define ENCODE_XS_USEFP 1
39cf9a5e	20
fcf2db38	21	#define UNIMPLEMENTED(x,y) y x (SV sv, char encoding) {dTHX; \
2f5768b8	22	Perl_croak(aTHX_ "panic_unimplemented"); \
4a83738a	23	return (y)0; /* fool picky compilers */ \
87714904	24	}
85982a32	25	/**/
7e9a885a	26	UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
7e9a885a	27	UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)
33af2bc7	28
b0b300a3	29	void
aa0053b7	30	Encode_XSEncoding(pTHX_ encode_t * enc)
2f2b4ff2	31	{
aa0053b7	32	dSP;
	33	HV *stash = gv_stashpv("Encode::XS", TRUE);
	34	SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))), stash);
	35	int i = 0;
	36	PUSHMARK(sp);
	37	XPUSHs(sv);
	38	while (enc->name[i]) {
	39	const char *name = enc->name[i++];
	40	XPUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
	41	}
	42	PUTBACK;
	43	call_pv("Encode::define_encoding", G_DISCARD);
	44	SvREFCNT_dec(sv);
2f2b4ff2	45	}
2f2b4ff2	46
aa0053b7	47	void
	48	call_failure(SV * routine, U8 * done, U8 * dest, U8 * orig)
	49	{
85982a32	50	/* Exists for breakpointing */
aa0053b7	51	}
67e989fb	52
85982a32	53
2f2b4ff2	54	static SV *
aa0053b7	55	encode_method(pTHX_ encode_t * enc, encpage_t * dir, SV * src,
85982a32	56	int check)
2f2b4ff2	57	{
aa0053b7	58	STRLEN slen;
aa0053b7	59	U8 s = (U8 ) SvPV(src, slen);
3aececda	60	STRLEN tlen = slen;
	61	STRLEN ddone = 0;
	62	STRLEN sdone = 0;
39cf9a5e	63
3c49ab08	64	/* We allocate slen+1.
85982a32	65	PerlIO dumps core if this value is smaller than this. */
3c49ab08	66	SV *dst = sv_2mortal(newSV(slen+1));
85982a32	67	U8 d = (U8 )SvPVX(dst);
	68	STRLEN dlen = SvLEN(dst)-1;
	69	int code;
	70
	71	if (!slen){
	72	SvCUR_set(dst, 0);
	73	SvPOK_only(dst);
	74	goto ENCODE_END;
	75	}
	76
	77	while (code = do_encode(dir, s, &slen, d, dlen, &dlen, !check))
	78	{
	79	SvCUR_set(dst, dlen+ddone);
	80	SvPOK_only(dst);
0b3236bb	81
85982a32	82	if (code == ENCODE_FALLBACK \|\| code == ENCODE_PARTIAL){
	83	break;
	84	}
	85	switch (code) {
	86	case ENCODE_NOSPACE:
	87	{
	88	STRLEN more = 0; /* make sure you initialize! */
	89	STRLEN sleft;
	90	sdone += slen;
	91	ddone += dlen;
	92	sleft = tlen - sdone;
fcb875d4	93	#if ENCODE_XS_PROFILE >= 2
85982a32	94	Perl_warn(aTHX_
	95	"more=%d, sdone=%d, sleft=%d, SvLEN(dst)=%d\n",
	96	more, sdone, sleft, SvLEN(dst));
fcb875d4	97	#endif
85982a32	98	if (sdone != 0) { /* has src ever been processed ? */
39cf9a5e	99	#if ENCODE_XS_USEFP == 2
85982a32	100	more = (1.0tlenSvLEN(dst)+sdone-1)/sdone
85982a32	101	- SvLEN(dst);
39cf9a5e	102	#elif ENCODE_XS_USEFP
85982a32	103	more = (1.0SvLEN(dst)+1)/sdone sleft;
39cf9a5e	104	#else
85982a32	105	/* safe until SvLEN(dst) == MAX_INT/16 */
85982a32	106	more = (16SvLEN(dst)+1)/sdone/16 sleft;
39cf9a5e	107	#endif
39cf9a5e	108	}
85982a32	109	more += UTF8_MAXLEN; /* insurance policy */
	110	d = (U8 *) SvGROW(dst, SvLEN(dst) + more);
	111	/* dst need to grow need MORE bytes! */
	112	if (ddone >= SvLEN(dst)) {
	113	Perl_croak(aTHX_ "Destination couldn't be grown.");
	114	}
	115	dlen = SvLEN(dst)-ddone-1;
	116	d += ddone;
	117	s += slen;
	118	slen = tlen-sdone;
	119	continue;
	120	}
	121	case ENCODE_NOREP:
	122	/* encoding */
0ab8f81e	123	if (dir == enc->f_utf8) {
85982a32	124	STRLEN clen;
85982a32	125	UV ch =
0ab8f81e	126	utf8n_to_uvuni(s+slen, (SvCUR(src)-slen),
b0b300a3	127	&clen, UTF8_ALLOW_ANY\|UTF8_CHECK_ONLY);
85982a32	128	if (check & ENCODE_DIE_ON_ERR) {
85982a32	129	Perl_croak(
0ab8f81e	130	aTHX_ "\"\\N{U+%" UVxf "}\" does not map to %s, %d",
85982a32	131	ch, enc->name[0], __LINE__);
	132	}else{
	133	if (check & ENCODE_RETURN_ON_ERR){
	134	if (check & ENCODE_WARN_ON_ERR){
	135	Perl_warner(
	136	aTHX_ packWARN(WARN_UTF8),
0ab8f81e	137	"\"\\N{U+%" UVxf "}\" does not map to %s",
85982a32	138	ch,enc->name[0]);
	139	}
	140	goto ENCODE_SET_SRC;
	141	}else if (check & ENCODE_PERLQQ){
0ab8f81e	142	SV* perlqq =
85982a32	143	sv_2mortal(newSVpvf("\\x{%04x}", ch));
b2704119	144	sdone += slen + clen;
85982a32	145	ddone += dlen + SvCUR(perlqq);
85982a32	146	sv_catsv(dst, perlqq);
0ab8f81e	147	} else {
85982a32	148	/* fallback char */
85982a32	149	sdone += slen + clen;
0ab8f81e	150	ddone += dlen + enc->replen;
0ab8f81e	151	sv_catpvn(dst, (char*)enc->rep, enc->replen);
b2704119	152	}
0ab8f81e	153	}
b2704119	154	}
85982a32	155	/* decoding */
0ab8f81e	156	else {
85982a32	157	if (check & ENCODE_DIE_ON_ERR){
	158	Perl_croak(
	159	aTHX_ "%s \"\\x%02X\" does not map to Unicode (%d)",
	160	enc->name[0], (U8) s[slen], code);
	161	}else{
	162	if (check & ENCODE_RETURN_ON_ERR){
	163	if (check & ENCODE_WARN_ON_ERR){
	164	Perl_warner(
	165	aTHX_ packWARN(WARN_UTF8),
	166	"%s \"\\x%02X\" does not map to Unicode (%d)",
	167	enc->name[0], (U8) s[slen], code);
	168	}
	169	goto ENCODE_SET_SRC;
	170	}else if (check & ENCODE_PERLQQ){
0ab8f81e	171	SV* perlqq =
b2704119	172	sv_2mortal(newSVpvf("\\x%02X", s[slen]));
85982a32	173	sdone += slen + 1;
	174	ddone += dlen + SvCUR(perlqq);
	175	sv_catsv(dst, perlqq);
	176	} else {
	177	sdone += slen + 1;
0ab8f81e	178	ddone += dlen + strlen(FBCHAR_UTF8);
0ab8f81e	179	sv_catpv(dst, FBCHAR_UTF8);
85982a32	180	}
aa0053b7	181	}
b2704119	182	}
85982a32	183	/* settle variables when fallback */
b0b300a3	184	d = (U8 *)SvEND(dst);
0ab8f81e	185	dlen = SvLEN(dst) - ddone - 1;
0ab8f81e	186	s = (U8*)SvPVX(src) + sdone;
b2704119	187	slen = tlen - sdone;
b2704119	188	break;
2f2b4ff2	189
85982a32	190	default:
	191	Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
	192	code, (dir == enc->f_utf8) ? "to" : "from",
	193	enc->name[0]);
	194	return &PL_sv_undef;
aa0053b7	195	}
85982a32	196	}
85982a32	197	ENCODE_SET_SRC:
6d1c0808	198	if (check && !(check & ENCODE_LEAVE_SRC)){
6d1c0808	199	sdone = SvCUR(src) - (slen+sdone);
85982a32	200	if (sdone) {
85982a32	201	sv_setpvn(src, (char*)s+slen, sdone);
aa0053b7	202	}
85982a32	203	SvCUR_set(src, sdone);
2f2b4ff2	204	}
85982a32	205	/* warn("check = 0x%X, code = 0x%d\n", check, code); */
	206	if (code && !(check & ENCODE_RETURN_ON_ERR)) {
	207	return &PL_sv_undef;
2f2b4ff2	208	}
0ab8f81e	209
85982a32	210	SvCUR_set(dst, dlen+ddone);
85982a32	211	SvPOK_only(dst);
0ab8f81e	212
39cf9a5e	213	#if ENCODE_XS_PROFILE
39cf9a5e	214	if (SvCUR(dst) > SvCUR(src)){
85982a32	215	Perl_warn(aTHX_
	216	"SvLEN(dst)=%d, SvCUR(dst)=%d. %d bytes unused(%f %%)\n",
	217	SvLEN(dst), SvCUR(dst), SvLEN(dst) - SvCUR(dst),
	218	(SvLEN(dst) - SvCUR(dst))1.0/SvLEN(dst)100.0);
39cf9a5e	219	}
3c49ab08	220	#endif
0ab8f81e	221
85982a32	222	ENCODE_END:
0b3236bb	223	*SvEND(dst) = '\0';
aa0053b7	224	return dst;
2f2b4ff2	225	}
2f2b4ff2	226
50d26985	227	MODULE = Encode PACKAGE = Encode::XS PREFIX = Method_
2f2b4ff2	228
	229	PROTOTYPES: ENABLE
	230
	231	void
0a95303c	232	Method_name(obj)
	233	SV * obj
	234	CODE:
85982a32	235	{
	236	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	237	ST(0) = sv_2mortal(newSVpvn(enc->name[0],strlen(enc->name[0])));
	238	XSRETURN(1);
	239	}
0a95303c	240
0a95303c	241	void
b2704119	242	Method_decode(obj,src,check = 0)
2f2b4ff2	243	SV * obj
2f2b4ff2	244	SV * src
b2704119	245	int check
2f2b4ff2	246	CODE:
aae85ceb	247	{
85982a32	248	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	249	ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
	250	SvUTF8_on(ST(0));
aae85ceb	251	XSRETURN(1);
	252	}
	253
	254	void
85982a32	255	Method_encode(obj,src,check = 0)
aae85ceb	256	SV * obj
85982a32	257	SV * src
85982a32	258	int check
aae85ceb	259	CODE:
aae85ceb	260	{
85982a32	261	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	262	sv_utf8_upgrade(src);
	263	ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
aae85ceb	264	XSRETURN(1);
	265	}
	266
0ab8f81e	267	void
	268	Method_needs_lines(obj)
	269	SV * obj
	270	CODE:
	271	{
	272	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	273	ST(0) = &PL_sv_no;
	274	XSRETURN(1);
	275	}
	276
	277	void
	278	Method_perlio_ok(obj)
	279	SV * obj
	280	CODE:
	281	{
	282	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	283	if (hv_exists(get_hv("INC", 0),
	284	PERLIO_FILENAME, strlen(PERLIO_FILENAME)))
	285	{
	286	ST(0) = &PL_sv_yes;
	287	}else{
	288	ST(0) = &PL_sv_no;
	289	}
	290	XSRETURN(1);
	291	}
	292
67e989fb	293	MODULE = Encode PACKAGE = Encode
2c674647	294
	295	PROTOTYPES: ENABLE
	296
67e989fb	297	I32
2c674647	298	_bytes_to_utf8(sv, ...)
85982a32	299	SV * sv
	300	CODE:
	301	{
	302	SV * encoding = items == 2 ? ST(1) : Nullsv;
0ab8f81e	303
85982a32	304	if (encoding)
	305	RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
	306	else {
	307	STRLEN len;
	308	U8* s = (U8*)SvPV(sv, len);
	309	U8* converted;
	310
	311	converted = bytes_to_utf8(s, &len); /* This allocs */
	312	sv_setpvn(sv, (char *)converted, len);
	313	SvUTF8_on(sv); /* XXX Should we? */
	314	Safefree(converted); /* ... so free it */
	315	RETVAL = len;
	316	}
	317	}
	318	OUTPUT:
	319	RETVAL
2c674647	320
67e989fb	321	I32
2c674647	322	_utf8_to_bytes(sv, ...)
85982a32	323	SV * sv
	324	CODE:
	325	{
	326	SV * to = items > 1 ? ST(1) : Nullsv;
	327	SV * check = items > 2 ? ST(2) : Nullsv;
	328
	329	if (to) {
	330	RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
	331	} else {
	332	STRLEN len;
	333	U8 s = (U8)SvPV(sv, len);
	334
	335	RETVAL = 0;
	336	if (SvTRUE(check)) {
	337	/* Must do things the slow way */
	338	U8 *dest;
	339	/* We need a copy to pass to check() */
0ab8f81e	340	U8 src = (U8)savepv((char *)s);
85982a32	341	U8 *send = s + len;
	342
	343	New(83, dest, len, U8); /* I think */
	344
	345	while (s < send) {
	346	if (*s < 0x80){
	347	dest++ = s++;
	348	} else {
	349	STRLEN ulen;
	350	UV uv = *s++;
	351
	352	/* Have to do it all ourselves because of error routine,
	353	aargh. */
	354	if (!(uv & 0x40)){ goto failure; }
	355	if (!(uv & 0x20)) { ulen = 2; uv &= 0x1f; }
	356	else if (!(uv & 0x10)) { ulen = 3; uv &= 0x0f; }
	357	else if (!(uv & 0x08)) { ulen = 4; uv &= 0x07; }
	358	else if (!(uv & 0x04)) { ulen = 5; uv &= 0x03; }
	359	else if (!(uv & 0x02)) { ulen = 6; uv &= 0x01; }
	360	else if (!(uv & 0x01)) { ulen = 7; uv = 0; }
	361	else { ulen = 13; uv = 0; }
87714904	362
85982a32	363	/* Note change to utf8.c variable naming, for variety */
85982a32	364	while (ulen--) {
0ab8f81e	365	if ((*s & 0xc0) != 0x80){
0ab8f81e	366	goto failure;
85982a32	367	} else {
	368	uv = (uv << 6) \| (*s++ & 0x3f);
	369	}
87714904	370	}
67e989fb	371	if (uv > 256) {
67e989fb	372	failure:
85982a32	373	call_failure(check, s, dest, src);
85982a32	374	/* Now what happens? */
67e989fb	375	}
67e989fb	376	*dest++ = (U8)uv;
85982a32	377	}
	378	}
	379	} else {
	380	RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
2c674647	381	}
85982a32	382	}
	383	}
	384	OUTPUT:
	385	RETVAL
2c674647	386
2c674647	387	bool
b2704119	388	is_utf8(sv, check = 0)
4411f3b6	389	SV * sv
b2704119	390	int check
85982a32	391	CODE:
	392	{
	393	if (SvGMAGICAL(sv)) /* it could be $1, for example */
	394	sv = newSVsv(sv); /* GMAGIG will be done */
	395	if (SvPOK(sv)) {
	396	RETVAL = SvUTF8(sv) ? TRUE : FALSE;
	397	if (RETVAL &&
	398	check &&
	399	!is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
2c674647	400	RETVAL = FALSE;
85982a32	401	} else {
	402	RETVAL = FALSE;
	403	}
	404	if (sv != ST(0))
	405	SvREFCNT_dec(sv); /* it was a temp copy */
	406	}
	407	OUTPUT:
	408	RETVAL
2c674647	409
2c674647	410	SV *
4411f3b6	411	_utf8_on(sv)
85982a32	412	SV * sv
	413	CODE:
	414	{
	415	if (SvPOK(sv)) {
	416	SV *rsv = newSViv(SvUTF8(sv));
	417	RETVAL = rsv;
	418	SvUTF8_on(sv);
	419	} else {
	420	RETVAL = &PL_sv_undef;
	421	}
	422	}
	423	OUTPUT:
	424	RETVAL
2c674647	425
2c674647	426	SV *
4411f3b6	427	_utf8_off(sv)
85982a32	428	SV * sv
	429	CODE:
	430	{
	431	if (SvPOK(sv)) {
	432	SV *rsv = newSViv(SvUTF8(sv));
	433	RETVAL = rsv;
	434	SvUTF8_off(sv);
	435	} else {
	436	RETVAL = &PL_sv_undef;
	437	}
	438	}
	439	OUTPUT:
	440	RETVAL
	441
	442	PROTOTYPES: DISABLE
	443
	444
	445	int
	446	DIE_ON_ERR()
	447	CODE:
	448	RETVAL = ENCODE_DIE_ON_ERR;
	449	OUTPUT:
	450	RETVAL
	451
0ab8f81e	452	int
85982a32	453	WARN_ON_ERR()
	454	CODE:
	455	RETVAL = ENCODE_WARN_ON_ERR;
	456	OUTPUT:
	457	RETVAL
	458
	459	int
	460	LEAVE_SRC()
	461	CODE:
	462	RETVAL = ENCODE_LEAVE_SRC;
	463	OUTPUT:
	464	RETVAL
	465
	466	int
	467	RETURN_ON_ERR()
	468	CODE:
	469	RETVAL = ENCODE_RETURN_ON_ERR;
	470	OUTPUT:
	471	RETVAL
	472
	473	int
	474	PERLQQ()
	475	CODE:
	476	RETVAL = ENCODE_PERLQQ;
	477	OUTPUT:
	478	RETVAL
	479
	480	int
	481	FB_DEFAULT()
	482	CODE:
	483	RETVAL = ENCODE_FB_DEFAULT;
	484	OUTPUT:
	485	RETVAL
	486
	487	int
	488	FB_CROAK()
	489	CODE:
	490	RETVAL = ENCODE_FB_CROAK;
	491	OUTPUT:
	492	RETVAL
	493
	494	int
	495	FB_QUIET()
	496	CODE:
	497	RETVAL = ENCODE_FB_QUIET;
	498	OUTPUT:
	499	RETVAL
	500
	501	int
	502	FB_WARN()
	503	CODE:
	504	RETVAL = ENCODE_FB_WARN;
	505	OUTPUT:
	506	RETVAL
	507
	508	int
	509	FB_PERLQQ()
	510	CODE:
	511	RETVAL = ENCODE_FB_PERLQQ;
	512	OUTPUT:
	513	RETVAL
2c674647	514
33af2bc7	515	BOOT:
33af2bc7	516	{
85982a32	517	#include "def_t.h"
e7cbefb8	518	#include "def_t.exh"
33af2bc7	519	}