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

/*
 $Id: Encode.xs,v 1.49 2002/10/21 19:47:47 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 = (STRLEN)((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,
                              enc->name[0], (UV)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,
               	        enc->name[0], (UV)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::utf8	PREFIX = Method_

void
Method_decode(obj,src,check = 0)
SV *	obj
SV *	src
int	check
CODE:
{
    STRLEN slen;
    U8 *s = (U8 *) SvPV(src, slen);
    U8 *e = (U8 *) SvEND(src);
    SV *dst = newSV(slen);
    SvPOK_only(dst);
    SvCUR_set(dst,0);
    if (SvUTF8(src)) {
	s = utf8_to_bytes(s,&slen);
	if (s) {
	    SvCUR_set(src,slen);
	    SvUTF8_off(src);
	    e = s+slen;
	}
	else {
	    croak("Cannot decode string with wide characters");
	}
    }
    while (s < e) {
    	if (UTF8_IS_INVARIANT(*s) || UTF8_IS_START(*s)) {
	    U8 skip = UTF8SKIP(s);
	    if ((s + skip) > e) {
	    	/* Partial character - done */
	    	break;
	    }
	    else if (is_utf8_char(s)) {
	    	/* Whole char is good */
		sv_catpvn(dst,(char *)s,skip);
		s += skip;
		continue;
	    }
	    else {
	    	/* starts ok but isn't "good" */
	    }
	}
	else {
	    /* Invalid start byte */
	}
	/* If we get here there is something wrong with alleged UTF-8 */
	if (check & ENCODE_DIE_ON_ERR){
	    Perl_croak(aTHX_ ERR_DECODE_NOMAP, "utf8", (UV)*s);
	    XSRETURN(0);
	}
	if (check & ENCODE_WARN_ON_ERR){
	    Perl_warner(aTHX_ packWARN(WARN_UTF8),
			ERR_DECODE_NOMAP, "utf8", (UV)*s);
        }
    	if (check & ENCODE_RETURN_ON_ERR) {
		break;
    	}
        if (check & (ENCODE_PERLQQ|ENCODE_HTMLCREF|ENCODE_XMLCREF)){
	    SV* perlqq = newSVpvf("\\x%02" UVXf, (UV)*s);
    	    sv_catsv(dst, perlqq);
	    SvREFCNT_dec(perlqq);
	} else {
	    sv_catpv(dst, FBCHAR_UTF8);
	}
	s++;
    }
    *SvEND(dst) = '\0';

    /* Clear out translated part of source unless asked not to */
    if (check && !(check & ENCODE_LEAVE_SRC)){
	slen = e-s;
	if (slen) {
	    sv_setpvn(src, (char*)s, slen);
	}
	SvCUR_set(src, slen);
    }
    SvUTF8_on(dst);
    ST(0) = sv_2mortal(dst);
    XSRETURN(1);
}

void
Method_encode(obj,src,check = 0)
SV *	obj
SV *	src
int	check
CODE:
{
    STRLEN slen;
    U8 *s = (U8 *) SvPV(src, slen);
    U8 *e = (U8 *) SvEND(src);
    SV *dst = newSV(slen);
    if (SvUTF8(src)) {
        /* Already encoded - trust it and just copy the octets */
    	sv_setpvn(dst,(char *)s,(e-s));
	s = e;
    }
    else {
    	/* Native bytes - can always encode */
	U8 *d = (U8 *) SvGROW(dst,2*slen);
    	while (s < e) {
    	    UV uv = NATIVE_TO_UNI((UV) *s++);
            if (UNI_IS_INVARIANT(uv))
            	*d++ = (U8)UTF_TO_NATIVE(uv);
            else {
    	        *d++ = (U8)UTF8_EIGHT_BIT_HI(uv);
                *d++ = (U8)UTF8_EIGHT_BIT_LO(uv);
            }
	}
        SvCUR_set(dst, d- (U8 *)SvPVX(dst));
    	*SvEND(dst) = '\0';
    }

    /* Clear out translated part of source unless asked not to */
    if (check && !(check & ENCODE_LEAVE_SRC)){
	slen = e-s;
	if (slen) {
	    sv_setpvn(src, (char*)s, slen);
	}
	SvCUR_set(src, slen);
    }
    SvPOK_only(dst);
    SvUTF8_off(dst);
    ST(0) = sv_2mortal(dst);
    XSRETURN(1);
}

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)));
    if (SvUTF8(src)) {
    	sv_utf8_downgrade(src, FALSE);
    }
    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	/*
ab3374e4	2	$Id: Encode.xs,v 1.49 2002/10/21 19:47:47 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
436c6dd3	83	while( (code = do_encode(dir, s, &slen, d, dlen, &dlen, !check)) )
85982a32 JH	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
6e21dc91	109	more = (STRLEN)((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	174	Perl_croak(aTHX_ ERR_DECODE_NOMAP,
436c6dd3	175	enc->name[0], (UV)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	181	ERR_DECODE_NOMAP,
436c6dd3	182	enc->name[0], (UV)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
ab3374e4 DK	241	MODULE = Encode PACKAGE = Encode::utf8 PREFIX = Method_
	242
	243	void
	244	Method_decode(obj,src,check = 0)
	245	SV * obj
	246	SV * src
	247	int check
	248	CODE:
	249	{
	250	STRLEN slen;
	251	U8 s = (U8 ) SvPV(src, slen);
	252	U8 e = (U8 ) SvEND(src);
	253	SV *dst = newSV(slen);
	254	SvPOK_only(dst);
	255	SvCUR_set(dst,0);
	256	if (SvUTF8(src)) {
	257	s = utf8_to_bytes(s,&slen);
	258	if (s) {
	259	SvCUR_set(src,slen);
	260	SvUTF8_off(src);
	261	e = s+slen;
	262	}
	263	else {
	264	croak("Cannot decode string with wide characters");
	265	}
	266	}
	267	while (s < e) {
	268	if (UTF8_IS_INVARIANT(s) \|\| UTF8_IS_START(s)) {
	269	U8 skip = UTF8SKIP(s);
	270	if ((s + skip) > e) {
	271	/* Partial character - done */
	272	break;
	273	}
	274	else if (is_utf8_char(s)) {
	275	/* Whole char is good */
	276	sv_catpvn(dst,(char *)s,skip);
	277	s += skip;
	278	continue;
	279	}
	280	else {
	281	/* starts ok but isn't "good" */
	282	}
	283	}
	284	else {
	285	/* Invalid start byte */
	286	}
	287	/* If we get here there is something wrong with alleged UTF-8 */
	288	if (check & ENCODE_DIE_ON_ERR){
	289	Perl_croak(aTHX_ ERR_DECODE_NOMAP, "utf8", (UV)*s);
	290	XSRETURN(0);
	291	}
	292	if (check & ENCODE_WARN_ON_ERR){
	293	Perl_warner(aTHX_ packWARN(WARN_UTF8),
	294	ERR_DECODE_NOMAP, "utf8", (UV)*s);
	295	}
	296	if (check & ENCODE_RETURN_ON_ERR) {
	297	break;
	298	}
	299	if (check & (ENCODE_PERLQQ\|ENCODE_HTMLCREF\|ENCODE_XMLCREF)){
	300	SV* perlqq = newSVpvf("\\x%02" UVXf, (UV)*s);
	301	sv_catsv(dst, perlqq);
	302	SvREFCNT_dec(perlqq);
	303	} else {
	304	sv_catpv(dst, FBCHAR_UTF8);
305	}
306	s++;
307	}
308	*SvEND(dst) = '\0';
309
310	/* Clear out translated part of source unless asked not to */
311	if (check && !(check & ENCODE_LEAVE_SRC)){
312	slen = e-s;
313	if (slen) {
314	sv_setpvn(src, (char*)s, slen);
315	}
316	SvCUR_set(src, slen);
317	}
318	SvUTF8_on(dst);
319	ST(0) = sv_2mortal(dst);
320	XSRETURN(1);
321	}
322
323	void
324	Method_encode(obj,src,check = 0)
325	SV * obj
326	SV * src
327	int check
328	CODE:
329	{
330	STRLEN slen;
331	U8 s = (U8 ) SvPV(src, slen);
332	U8 e = (U8 ) SvEND(src);
333	SV *dst = newSV(slen);
334	if (SvUTF8(src)) {
335	/* Already encoded - trust it and just copy the octets */
336	sv_setpvn(dst,(char *)s,(e-s));
337	s = e;
338	}
339	else {
340	/* Native bytes - can always encode */
341	U8 d = (U8 ) SvGROW(dst,2*slen);
342	while (s < e) {
343	UV uv = NATIVE_TO_UNI((UV) *s++);
344	if (UNI_IS_INVARIANT(uv))
345	*d++ = (U8)UTF_TO_NATIVE(uv);
346	else {
347	*d++ = (U8)UTF8_EIGHT_BIT_HI(uv);
348	*d++ = (U8)UTF8_EIGHT_BIT_LO(uv);
349	}
350	}
351	SvCUR_set(dst, d- (U8 *)SvPVX(dst));
352	*SvEND(dst) = '\0';
353	}
354
355	/* Clear out translated part of source unless asked not to */
356	if (check && !(check & ENCODE_LEAVE_SRC)){
357	slen = e-s;
358	if (slen) {
359	sv_setpvn(src, (char*)s, slen);
360	}
361	SvCUR_set(src, slen);
362	}
363	SvPOK_only(dst);
364	SvUTF8_off(dst);
365	ST(0) = sv_2mortal(dst);
366	XSRETURN(1);
367	}
368
50d26985	369	MODULE = Encode PACKAGE = Encode::XS PREFIX = Method_
2f2b4ff2 NIS	370
	371	PROTOTYPES: ENABLE
	372
	373	void
0a95303c NIS	374	Method_name(obj)
	375	SV * obj
	376	CODE:
85982a32 JH	377	{
	378	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	379	ST(0) = sv_2mortal(newSVpvn(enc->name[0],strlen(enc->name[0])));
	380	XSRETURN(1);
	381	}
0a95303c NIS	382
0a95303c NIS	383	void
b2704119	384	Method_decode(obj,src,check = 0)
2f2b4ff2 NIS	385	SV * obj
2f2b4ff2 NIS	386	SV * src
b2704119	387	int check
2f2b4ff2	388	CODE:
aae85ceb	389	{
85982a32	390	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
ab3374e4 DK	391	if (SvUTF8(src)) {
	392	sv_utf8_downgrade(src, FALSE);
	393	}
85982a32 JH	394	ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
85982a32 JH	395	SvUTF8_on(ST(0));
aae85ceb DK	396	XSRETURN(1);
	397	}
	398
	399	void
85982a32	400	Method_encode(obj,src,check = 0)
aae85ceb	401	SV * obj
85982a32 JH	402	SV * src
85982a32 JH	403	int check
aae85ceb DK	404	CODE:
aae85ceb DK	405	{
85982a32 JH	406	encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj)));
	407	sv_utf8_upgrade(src);
	408	ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
aae85ceb DK	409	XSRETURN(1);
	410	}
	411
0ab8f81e JH	412	void
	413	Method_needs_lines(obj)
	414	SV * obj
	415	CODE:
	416	{
b32afa7c	417	/* encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj))); */
0ab8f81e JH	418	ST(0) = &PL_sv_no;
	419	XSRETURN(1);
	420	}
	421
	422	void
	423	Method_perlio_ok(obj)
	424	SV * obj
	425	CODE:
	426	{
b32afa7c	427	/* encode_t enc = INT2PTR(encode_t , SvIV(SvRV(obj))); */
10c5ecbb JH	428	/* require_pv(PERLIO_FILENAME); */
	429
	430	eval_pv("require PerlIO::encoding", 0);
	431
	432	if (SvTRUE(get_sv("@", 0))) {
0ab8f81e	433	ST(0) = &PL_sv_no;
10c5ecbb JH	434	}else{
10c5ecbb JH	435	ST(0) = &PL_sv_yes;
0ab8f81e JH	436	}
	437	XSRETURN(1);
	438	}
	439
67e989fb	440	MODULE = Encode PACKAGE = Encode
2c674647 JH	441
	442	PROTOTYPES: ENABLE
	443
67e989fb	444	I32
2c674647	445	_bytes_to_utf8(sv, ...)
85982a32 JH	446	SV * sv
	447	CODE:
	448	{
	449	SV * encoding = items == 2 ? ST(1) : Nullsv;
c6a7db43	450
85982a32 JH	451	if (encoding)
	452	RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
	453	else {
	454	STRLEN len;
	455	U8* s = (U8*)SvPV(sv, len);
	456	U8* converted;
	457
	458	converted = bytes_to_utf8(s, &len); /* This allocs */
	459	sv_setpvn(sv, (char *)converted, len);
	460	SvUTF8_on(sv); /* XXX Should we? */
	461	Safefree(converted); /* ... so free it */
	462	RETVAL = len;
	463	}
	464	}
	465	OUTPUT:
	466	RETVAL
2c674647	467
67e989fb	468	I32
2c674647	469	_utf8_to_bytes(sv, ...)
85982a32 JH	470	SV * sv
	471	CODE:
	472	{
	473	SV * to = items > 1 ? ST(1) : Nullsv;
	474	SV * check = items > 2 ? ST(2) : Nullsv;
	475
	476	if (to) {
	477	RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
	478	} else {
	479	STRLEN len;
	480	U8 s = (U8)SvPV(sv, len);
	481
	482	RETVAL = 0;
	483	if (SvTRUE(check)) {
	484	/* Must do things the slow way */
	485	U8 *dest;
	486	/* We need a copy to pass to check() */
c6a7db43	487	U8 src = (U8)savepv((char *)s);
85982a32 JH	488	U8 *send = s + len;
	489
	490	New(83, dest, len, U8); /* I think */
	491
	492	while (s < send) {
	493	if (*s < 0x80){
	494	dest++ = s++;
	495	} else {
	496	STRLEN ulen;
	497	UV uv = *s++;
	498
	499	/* Have to do it all ourselves because of error routine,
	500	aargh. */
	501	if (!(uv & 0x40)){ goto failure; }
	502	if (!(uv & 0x20)) { ulen = 2; uv &= 0x1f; }
	503	else if (!(uv & 0x10)) { ulen = 3; uv &= 0x0f; }
	504	else if (!(uv & 0x08)) { ulen = 4; uv &= 0x07; }
	505	else if (!(uv & 0x04)) { ulen = 5; uv &= 0x03; }
	506	else if (!(uv & 0x02)) { ulen = 6; uv &= 0x01; }
	507	else if (!(uv & 0x01)) { ulen = 7; uv = 0; }
	508	else { ulen = 13; uv = 0; }
87714904	509
85982a32 JH	510	/* Note change to utf8.c variable naming, for variety */
85982a32 JH	511	while (ulen--) {
c6a7db43 NIS	512	if ((*s & 0xc0) != 0x80){
c6a7db43 NIS	513	goto failure;
85982a32 JH	514	} else {
	515	uv = (uv << 6) \| (*s++ & 0x3f);
	516	}
87714904	517	}
67e989fb JH	518	if (uv > 256) {
67e989fb JH	519	failure:
85982a32 JH	520	call_failure(check, s, dest, src);
85982a32 JH	521	/* Now what happens? */
67e989fb JH	522	}
67e989fb JH	523	*dest++ = (U8)uv;
85982a32 JH	524	}
	525	}
	526	} else {
	527	RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
2c674647	528	}
85982a32 JH	529	}
	530	}
	531	OUTPUT:
	532	RETVAL
2c674647	533
2c674647	534	bool
b2704119	535	is_utf8(sv, check = 0)
4411f3b6	536	SV * sv
b2704119	537	int check
85982a32 JH	538	CODE:
	539	{
	540	if (SvGMAGICAL(sv)) /* it could be $1, for example */
	541	sv = newSVsv(sv); /* GMAGIG will be done */
	542	if (SvPOK(sv)) {
	543	RETVAL = SvUTF8(sv) ? TRUE : FALSE;
	544	if (RETVAL &&
	545	check &&
	546	!is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
2c674647	547	RETVAL = FALSE;
85982a32 JH	548	} else {
	549	RETVAL = FALSE;
	550	}
	551	if (sv != ST(0))
	552	SvREFCNT_dec(sv); /* it was a temp copy */
	553	}
	554	OUTPUT:
	555	RETVAL
2c674647 JH	556
2c674647 JH	557	SV *
4411f3b6	558	_utf8_on(sv)
85982a32 JH	559	SV * sv
	560	CODE:
	561	{
	562	if (SvPOK(sv)) {
	563	SV *rsv = newSViv(SvUTF8(sv));
	564	RETVAL = rsv;
	565	SvUTF8_on(sv);
	566	} else {
	567	RETVAL = &PL_sv_undef;
	568	}
	569	}
	570	OUTPUT:
	571	RETVAL
2c674647 JH	572
2c674647 JH	573	SV *
4411f3b6	574	_utf8_off(sv)
85982a32 JH	575	SV * sv
	576	CODE:
	577	{
	578	if (SvPOK(sv)) {
	579	SV *rsv = newSViv(SvUTF8(sv));
	580	RETVAL = rsv;
	581	SvUTF8_off(sv);
	582	} else {
	583	RETVAL = &PL_sv_undef;
	584	}
	585	}
	586	OUTPUT:
	587	RETVAL
	588
85982a32 JH	589	int
	590	DIE_ON_ERR()
	591	CODE:
	592	RETVAL = ENCODE_DIE_ON_ERR;
	593	OUTPUT:
	594	RETVAL
	595
c6a7db43	596	int
85982a32 JH	597	WARN_ON_ERR()
	598	CODE:
	599	RETVAL = ENCODE_WARN_ON_ERR;
	600	OUTPUT:
	601	RETVAL
	602
	603	int
	604	LEAVE_SRC()
	605	CODE:
	606	RETVAL = ENCODE_LEAVE_SRC;
	607	OUTPUT:
	608	RETVAL
	609
	610	int
	611	RETURN_ON_ERR()
	612	CODE:
	613	RETVAL = ENCODE_RETURN_ON_ERR;
	614	OUTPUT:
	615	RETVAL
	616
	617	int
	618	PERLQQ()
	619	CODE:
	620	RETVAL = ENCODE_PERLQQ;
	621	OUTPUT:
	622	RETVAL
	623
	624	int
af1f55d9 JH	625	HTMLCREF()
	626	CODE:
	627	RETVAL = ENCODE_HTMLCREF;
	628	OUTPUT:
	629	RETVAL
	630
	631	int
	632	XMLCREF()
	633	CODE:
	634	RETVAL = ENCODE_XMLCREF;
	635	OUTPUT:
	636	RETVAL
	637
	638	int
85982a32 JH	639	FB_DEFAULT()
	640	CODE:
	641	RETVAL = ENCODE_FB_DEFAULT;
	642	OUTPUT:
	643	RETVAL
	644
	645	int
	646	FB_CROAK()
	647	CODE:
	648	RETVAL = ENCODE_FB_CROAK;
	649	OUTPUT:
	650	RETVAL
	651
	652	int
	653	FB_QUIET()
	654	CODE:
	655	RETVAL = ENCODE_FB_QUIET;
	656	OUTPUT:
	657	RETVAL
	658
	659	int
	660	FB_WARN()
	661	CODE:
	662	RETVAL = ENCODE_FB_WARN;
	663	OUTPUT:
	664	RETVAL
	665
	666	int
	667	FB_PERLQQ()
	668	CODE:
	669	RETVAL = ENCODE_FB_PERLQQ;
	670	OUTPUT:
	671	RETVAL
2c674647	672
af1f55d9 JH	673	int
	674	FB_HTMLCREF()
	675	CODE:
	676	RETVAL = ENCODE_FB_HTMLCREF;
	677	OUTPUT:
	678	RETVAL
	679
	680	int
	681	FB_XMLCREF()
	682	CODE:
	683	RETVAL = ENCODE_FB_XMLCREF;
	684	OUTPUT:
	685	RETVAL
	686
33af2bc7 NIS	687	BOOT:
33af2bc7 NIS	688	{
85982a32	689	#include "def_t.h"
e7cbefb8	690	#include "def_t.exh"
33af2bc7	691	}