/*

$Id: Encode.xs,v 2.47 2019/03/13 00:26:18 dankogai Exp dankogai $

*/

#define PERL_NO_GET_CONTEXT

#define IN_ENCODE_XS

#include "EXTERN.h"

#include "perl.h"

#include "XSUB.h"

#include "encode.h"

#include "def_t.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

#ifndef SvIV_nomg

#define SvIV_nomg SvIV

#endif

#ifndef SvTRUE_nomg

#define SvTRUE_nomg SvTRUE

#endif

#ifndef SVfARG

#define SVfARG(p) ((void*)(p))

#endif

static void

Encode_XSEncoding(pTHX_ encode_t * enc)

{

dSP;

HV *stash = gv_stashpv("Encode::XS", TRUE);

SV *iv = newSViv(PTR2IV(enc));

SV *sv = sv_bless(newRV_noinc(iv),stash);

int i = 0;

/* with the SvLEN() == 0 hack, PVX won't be freed. We cast away name's

constness, in the hope that perl won't mess with it. */

assert(SvTYPE(iv) >= SVt_PV); assert(SvLEN(iv) == 0);

SvFLAGS(iv) |= SVp_POK;

SvPVX(iv) = (char*) enc->name[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);

}

static void

utf8_safe_downgrade(pTHX_ SV ** src, U8 ** s, STRLEN * slen, bool modify)

{

if (!modify) {

SV *tmp = sv_2mortal(newSVpvn((char *)*s, *slen));

SvUTF8_on(tmp);

if (SvTAINTED(*src))

SvTAINTED_on(tmp);

*src = tmp;

*s = (U8 *)SvPVX(*src);

}

if (*slen) {

if (!utf8_to_bytes(*s, slen))

croak("Wide character");

SvCUR_set(*src, *slen);

}

SvUTF8_off(*src);

}

static void

utf8_safe_upgrade(pTHX_ SV ** src, U8 ** s, STRLEN * slen, bool modify)

{

if (!modify) {

SV *tmp = sv_2mortal(newSVpvn((char *)*s, *slen));

if (SvTAINTED(*src))

SvTAINTED_on(tmp);

*src = tmp;

}

sv_utf8_upgrade_nomg(*src);

*s = (U8 *)SvPV_nomg(*src, *slen);

}

#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"

#define ERR_DECODE_STR_NOMAP "%s \"%s\" does not map to Unicode"

static SV *

do_fallback_cb(pTHX_ UV ch, SV *fallback_cb)

{

dSP;

int argc;

SV *retval;

ENTER;

SAVETMPS;

PUSHMARK(sp);

XPUSHs(sv_2mortal(newSVuv(ch)));

PUTBACK;

argc = call_sv(fallback_cb, G_SCALAR);

SPAGAIN;

if (argc != 1){

croak("fallback sub must return scalar!");

}

retval = POPs;

SvREFCNT_inc(retval);

PUTBACK;

FREETMPS;

LEAVE;

return retval;

}

static SV *

do_bytes_fallback_cb(pTHX_ U8 *s, STRLEN slen, SV *fallback_cb)

{

dSP;

int argc;

STRLEN i;

SV *retval;

ENTER;

SAVETMPS;

PUSHMARK(sp);

for (i=0; i<slen; ++i)

XPUSHs(sv_2mortal(newSVuv(s[i])));

PUTBACK;

argc = call_sv(fallback_cb, G_SCALAR);

SPAGAIN;

if (argc != 1){

croak("fallback sub must return scalar!");

}

retval = POPs;

SvREFCNT_inc(retval);

PUTBACK;

FREETMPS;

LEAVE;

return retval;

}

static SV *

encode_method(pTHX_ const encode_t * enc, const encpage_t * dir, SV * src, U8 * s, STRLEN slen,

IV check, STRLEN * offset, SV * term, int * retcode,

SV *fallback_cb)

{

U8 *sorig = s;

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 = newSV(slen+1);

U8 *d = (U8 *)SvPVX(dst);

STRLEN dlen = SvLEN(dst)-1;

int code = 0;

STRLEN trmlen = 0;

U8 *trm = term ? (U8*) SvPV(term, trmlen) : NULL;

if (SvTAINTED(src)) SvTAINTED_on(dst); /* propagate taintedness */

if (offset) {

s += *offset;

if (slen > *offset){ /* safeguard against slen overflow */

slen -= *offset;

}else{

slen = 0;

}

tlen = slen;

}

if (slen == 0){

SvCUR_set(dst, 0);

SvPOK_only(dst);

goto ENCODE_END;

}

while( (code = do_encode(dir, s, &slen, d, dlen, &dlen, !check,

trm, trmlen)) )

{

SvCUR_set(dst, dlen+ddone);

SvPOK_only(dst);

if (code == ENCODE_FALLBACK || code == ENCODE_PARTIAL ||

code == ENCODE_FOUND_TERM) {

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, (tlen-sdone-slen),

&clen, UTF8_ALLOW_ANY|UTF8_CHECK_ONLY);

/* if non-representable multibyte prefix at end of current buffer - break*/

if (clen > tlen - sdone - slen) break;

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 (encode_ckWARN(check, WARN_UTF8)) {

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|ENCODE_HTMLCREF|ENCODE_XMLCREF)){

STRLEN sublen;

char *substr;

SV* subchar =

(fallback_cb != &PL_sv_undef)

? do_fallback_cb(aTHX_ ch, fallback_cb)

: newSVpvf(check & ENCODE_PERLQQ ? "\\x{%04" UVxf "}" :

check & ENCODE_HTMLCREF ? "&#%" UVuf ";" :

"&#x%" UVxf ";", (UV)ch);

substr = SvPV(subchar, sublen);

if (SvUTF8(subchar) && sublen && !utf8_to_bytes((U8 *)substr, &sublen)) { /* make sure no decoded string gets in */

SvREFCNT_dec(subchar);

croak("Wide character");

}

sdone += slen + clen;

ddone += dlen + sublen;

sv_catpvn(dst, substr, sublen);

SvREFCNT_dec(subchar);

} 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 (encode_ckWARN(check, WARN_UTF8)) {

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)){

STRLEN sublen;

char *substr;

SV* subchar =

(fallback_cb != &PL_sv_undef)

? do_fallback_cb(aTHX_ (UV)s[slen], fallback_cb)

: newSVpvf("\\x%02" UVXf, (UV)s[slen]);

substr = SvPVutf8(subchar, sublen);

sdone += slen + 1;

ddone += dlen + sublen;

sv_catpvn(dst, substr, sublen);

SvREFCNT_dec(subchar);

} else {

sdone += slen + 1;

ddone += dlen + strlen(FBCHAR_UTF8);

sv_catpvn(dst, FBCHAR_UTF8, strlen(FBCHAR_UTF8));

}

}

/* settle variables when fallback */

d = (U8 *)SvEND(dst);

dlen = SvLEN(dst) - ddone - 1;

s = sorig + 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;

}

} /* End of looping through the string */

ENCODE_SET_SRC:

if (check && !(check & ENCODE_LEAVE_SRC)){

sdone = tlen - (slen+sdone);

sv_setpvn(src, (char*)s+slen, sdone);

SvSETMAGIC(src);

}

/* 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) > tlen){

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

if (offset)

*offset += sdone + slen;

ENCODE_END:

*SvEND(dst) = '\0';

if (retcode) *retcode = code;

return dst;

}

static bool

strict_utf8(pTHX_ SV* sv)

{

HV* hv;

SV** svp;

sv = SvRV(sv);

if (!sv || SvTYPE(sv) != SVt_PVHV)

return 0;

hv = (HV*)sv;

svp = hv_fetch(hv, "strict_utf8", 11, 0);

if (!svp)

return 0;

return SvTRUE(*svp);

}

static U8*

process_utf8(pTHX_ SV* dst, U8* s, U8* e, SV *check_sv,

bool encode, bool strict, bool stop_at_partial)

{

/* Copies the purportedly UTF-8 encoded string starting at 's' and ending

* at 'e' - 1 to 'dst', checking as it goes along that the string actually

* is valid UTF-8. There are two levels of strictness checking. If

* 'strict' is FALSE, the string is checked for being well-formed UTF-8, as

* extended by Perl. Additionally, if 'strict' is TRUE, above-Unicode code

* points, surrogates, and non-character code points are checked for. When

* invalid input is encountered, some action is taken, exactly what depends

* on the flags in 'check_sv'. 'encode' gives if this is from an encode

* operation (if TRUE), or a decode one. This function returns the

* position in 's' of the start of the next character beyond where it got

* to. If there were no problems, that will be 'e'. If 'stop_at_partial'

* is TRUE, if the final character before 'e' is incomplete, but valid as

* far as is available, no action will be taken on that partial character,

* and the return value will point to its first byte */

UV uv;

STRLEN ulen;

SV *fallback_cb;

IV check;

U8 *d;

STRLEN dlen;

char esc[UTF8_MAXLEN * 6 + 1];

STRLEN i;

const U32 flags = (strict)

? UTF8_DISALLOW_ILLEGAL_INTERCHANGE

: 0;

if (!SvOK(check_sv)) {

fallback_cb = &PL_sv_undef;

check = 0;

}

else if (SvROK(check_sv)) {

/* croak("UTF-8 decoder doesn't support callback CHECK"); */

fallback_cb = check_sv;

check = ENCODE_PERLQQ|ENCODE_LEAVE_SRC; /* same as perlqq */

}

else {

fallback_cb = &PL_sv_undef;

check = SvIV_nomg(check_sv);

}

SvPOK_only(dst);

SvCUR_set(dst,0);

dlen = (s && e && s < e) ? e-s+1 : 1;

d = (U8 *) SvGROW(dst, dlen);

stop_at_partial = stop_at_partial || (check & ENCODE_STOP_AT_PARTIAL);

while (s < e) {

/* If there were no errors, this will be 'e'; otherwise it will point

* to the first byte of the erroneous input */

const U8* e_or_where_failed;

bool valid = is_utf8_string_loc_flags(s, e - s, &e_or_where_failed, flags);

STRLEN len = e_or_where_failed - s;

/* Copy as far as was successful */

Move(s, d, len, U8);

d += len;

s = (U8 *) e_or_where_failed;

/* Are done if it was valid, or we are accepting partial characters and

* the only error is that the final bytes form a partial character */

if ( LIKELY(valid)

|| ( stop_at_partial

&& is_utf8_valid_partial_char_flags(s, e, flags)))

{

break;

}

/* Here, was not valid. If is 'strict', and is legal extended UTF-8,

* we know it is a code point whose value we can calculate, just not

* one accepted under strict. Otherwise, it is malformed in some way.

* In either case, the system function can calculate either the code

* point, or the best substitution for it */

uv = utf8n_to_uvchr(s, e - s, &ulen, UTF8_ALLOW_ANY);

/*

* Here, we are looping through the input and found an error.

* 'uv' is the code point in error if calculable, or the REPLACEMENT

* CHARACTER if not.

* 'ulen' is how many bytes of input this iteration of the loop

* consumes */

if (!encode && (check & (ENCODE_DIE_ON_ERR|ENCODE_WARN_ON_ERR|ENCODE_PERLQQ)))

for (i=0; i<ulen; ++i) sprintf(esc+4*i, "\\x%02X", s[i]);

if (check & ENCODE_DIE_ON_ERR){

if (encode)

Perl_croak(aTHX_ ERR_ENCODE_NOMAP, uv, (strict ? "UTF-8" : "utf8"));

else

Perl_croak(aTHX_ ERR_DECODE_STR_NOMAP, (strict ? "UTF-8" : "utf8"), esc);

}

if (encode_ckWARN(check, WARN_UTF8)) {

if (encode)

Perl_warner(aTHX_ packWARN(WARN_UTF8),

ERR_ENCODE_NOMAP, uv, (strict ? "UTF-8" : "utf8"));

else

Perl_warner(aTHX_ packWARN(WARN_UTF8),

ERR_DECODE_STR_NOMAP, (strict ? "UTF-8" : "utf8"), esc);

}

if (check & ENCODE_RETURN_ON_ERR) {

break;

}

if (check & (ENCODE_PERLQQ|ENCODE_HTMLCREF|ENCODE_XMLCREF)){

STRLEN sublen;

char *substr;

SV* subchar;

if (encode) {

subchar =

(fallback_cb != &PL_sv_undef)

? do_fallback_cb(aTHX_ uv, fallback_cb)

: newSVpvf(check & ENCODE_PERLQQ

? (ulen == 1 ? "\\x%02" UVXf : "\\x{%04" UVXf "}")

: check & ENCODE_HTMLCREF ? "&#%" UVuf ";"

: "&#x%" UVxf ";", uv);

substr = SvPV(subchar, sublen);

if (SvUTF8(subchar) && sublen && !utf8_to_bytes((U8 *)substr, &sublen)) { /* make sure no decoded string gets in */

SvREFCNT_dec(subchar);

croak("Wide character");

}

} else {

if (fallback_cb != &PL_sv_undef) {

/* in decode mode we have sequence of wrong bytes */

subchar = do_bytes_fallback_cb(aTHX_ s, ulen, fallback_cb);

} else {

char *ptr = esc;

/* ENCODE_PERLQQ is already stored in esc */

if (check & (ENCODE_HTMLCREF|ENCODE_XMLCREF))

for (i=0; i<ulen; ++i) ptr += sprintf(ptr, ((check & ENCODE_HTMLCREF) ? "&#%u;" : "&#x%02X;"), s[i]);

subchar = newSVpvn(esc, strlen(esc));

}

substr = SvPVutf8(subchar, sublen);

}

dlen += sublen - ulen;

SvCUR_set(dst, d-(U8 *)SvPVX(dst));

*SvEND(dst) = '\0';

sv_catpvn(dst, substr, sublen);

SvREFCNT_dec(subchar);

d = (U8 *) SvGROW(dst, dlen) + SvCUR(dst);

} else {

STRLEN fbcharlen = strlen(FBCHAR_UTF8);

dlen += fbcharlen - ulen;

if (SvLEN(dst) < dlen) {

SvCUR_set(dst, d-(U8 *)SvPVX(dst));

d = (U8 *) sv_grow(dst, dlen) + SvCUR(dst);

}

memcpy(d, FBCHAR_UTF8, fbcharlen);

d += fbcharlen;

}

s += ulen;

}

SvCUR_set(dst, d-(U8 *)SvPVX(dst));

*SvEND(dst) = '\0';

return s;

}

static SV *

find_encoding(pTHX_ SV *enc)

{

dSP;

I32 count;

SV *m_enc;

SV *obj = &PL_sv_undef;

#ifndef SV_NOSTEAL

U32 tmp;

#endif

ENTER;

SAVETMPS;

PUSHMARK(sp);

m_enc = sv_newmortal();

#ifndef SV_NOSTEAL

tmp = SvFLAGS(enc) & SVs_TEMP;

SvTEMP_off(enc);

sv_setsv_flags(m_enc, enc, 0);

SvFLAGS(enc) |= tmp;

#else

#if SV_NOSTEAL == 0

#error You have broken SV_NOSTEAL which cause memory corruption in sv_setsv_flags()

#error Most probably broken SV_NOSTEAL was defined by buggy version of ppport.h

#else

sv_setsv_flags(m_enc, enc, SV_NOSTEAL);

#endif

#endif

XPUSHs(m_enc);

PUTBACK;

count = call_pv("Encode::find_encoding", G_SCALAR);

SPAGAIN;

if (count > 0) {

obj = POPs;

SvREFCNT_inc(obj);

}

PUTBACK;

FREETMPS;

LEAVE;

return sv_2mortal(obj);

}

static SV *

call_encoding(pTHX_ const char *method, SV *obj, SV *src, SV *check)

{

dSP;

I32 count;

SV *dst = &PL_sv_undef;

PUSHMARK(sp);

if (check)

check = sv_2mortal(newSVsv(check));

if (!check || SvROK(check) || !SvTRUE_nomg(check) || (SvIV_nomg(check) & ENCODE_LEAVE_SRC))

src = sv_2mortal(newSVsv(src));

XPUSHs(obj);

XPUSHs(src);

XPUSHs(check ? check : &PL_sv_no);

PUTBACK;

count = call_method(method, G_SCALAR);

SPAGAIN;

if (count > 0) {

dst = POPs;

SvREFCNT_inc(dst);

}

PUTBACK;

return dst;

}

MODULE = Encode PACKAGE = Encode::utf8 PREFIX = Method_

PROTOTYPES: DISABLE

void

Method_decode(obj,src,check_sv = &PL_sv_no)

SV * obj

SV * src

SV * check_sv

PREINIT:

STRLEN slen;

U8 *s;

U8 *e;

SV *dst;

bool renewed = 0;

IV check;

bool modify;

dSP;

INIT:

SvGETMAGIC(src);

SvGETMAGIC(check_sv);

check = SvROK(check_sv) ? ENCODE_PERLQQ|ENCODE_LEAVE_SRC : SvOK(check_sv) ? SvIV_nomg(check_sv) : 0;

modify = (check && !(check & ENCODE_LEAVE_SRC));

PPCODE:

if (!SvOK(src))

XSRETURN_UNDEF;

s = modify ? (U8 *)SvPV_force_nomg(src, slen) : (U8 *)SvPV_nomg(src, slen);

if (SvUTF8(src))

utf8_safe_downgrade(aTHX_ &src, &s, &slen, modify);

e = s+slen;

/*

* PerlIO check -- we assume the object is of PerlIO if renewed

*/

ENTER; SAVETMPS;

PUSHMARK(sp);

XPUSHs(obj);

PUTBACK;

if (call_method("renewed",G_SCALAR) == 1) {

SPAGAIN;

renewed = (bool)POPi;

PUTBACK;

#if 0

fprintf(stderr, "renewed == %d\n", renewed);

#endif

}

FREETMPS; LEAVE;

/* end PerlIO check */

dst = sv_2mortal(newSV(slen>0?slen:1)); /* newSV() abhors 0 -- inaba */

s = process_utf8(aTHX_ dst, s, e, check_sv, 0, strict_utf8(aTHX_ obj), renewed);

/* Clear out translated part of source unless asked not to */

if (modify) {

slen = e-s;

sv_setpvn(src, (char*)s, slen);

SvSETMAGIC(src);

}

SvUTF8_on(dst);

if (SvTAINTED(src)) SvTAINTED_on(dst); /* propagate taintedness */

ST(0) = dst;

XSRETURN(1);

void

Method_encode(obj,src,check_sv = &PL_sv_no)

SV * obj

SV * src

SV * check_sv

PREINIT:

STRLEN slen;

U8 *s;

U8 *e;

SV *dst;

IV check;

bool modify;

INIT:

SvGETMAGIC(src);

SvGETMAGIC(check_sv);

check = SvROK(check_sv) ? ENCODE_PERLQQ|ENCODE_LEAVE_SRC : SvOK(check_sv) ? SvIV_nomg(check_sv) : 0;

modify = (check && !(check & ENCODE_LEAVE_SRC));

PPCODE:

if (!SvOK(src))

XSRETURN_UNDEF;

s = modify ? (U8 *)SvPV_force_nomg(src, slen) : (U8 *)SvPV_nomg(src, slen);

e = s+slen;

dst = sv_2mortal(newSV(slen>0?slen:1)); /* newSV() abhors 0 -- inaba */

if (SvUTF8(src)) {

/* Already encoded */

if (strict_utf8(aTHX_ obj)) {

s = process_utf8(aTHX_ dst, s, e, check_sv, 1, 1, 0);

}

else {

/* 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+1); /* +1 or assertion will botch */

while (s < e) {

#ifdef append_utf8_from_native_byte

append_utf8_from_native_byte(*s, &d);

s++;

#else

UV uv = NATIVE_TO_UNI((UV) *s);

s++; /* Above expansion of NATIVE_TO_UNI() is safer this way. */

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);

}

#endif

}

SvCUR_set(dst, d- (U8 *)SvPVX(dst));

*SvEND(dst) = '\0';

}

/* Clear out translated part of source unless asked not to */

if (modify) {

slen = e-s;

sv_setpvn(src, (char*)s, slen);

SvSETMAGIC(src);

}

SvPOK_only(dst);

SvUTF8_off(dst);

if (SvTAINTED(src)) SvTAINTED_on(dst); /* propagate taintedness */

ST(0) = dst;

XSRETURN(1);

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

PROTOTYPES: DISABLE

SV *

Method_renew(obj)

SV * obj

CODE:

PERL_UNUSED_VAR(obj);

RETVAL = newSVsv(obj);

OUTPUT:

RETVAL

int

Method_renewed(obj)

SV * obj

CODE:

RETVAL = 0;

PERL_UNUSED_VAR(obj);

OUTPUT:

RETVAL

SV *

Method_name(obj)

SV * obj

PREINIT:

encode_t *enc;

INIT:

enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));

CODE:

RETVAL = newSVpvn(enc->name[0], strlen(enc->name[0]));

OUTPUT:

RETVAL

bool

Method_cat_decode(obj, dst, src, off, term, check_sv = &PL_sv_no)

SV * obj

SV * dst

SV * src

SV * off

SV * term

SV * check_sv

PREINIT:

IV check;

SV *fallback_cb;

bool modify;

encode_t *enc;

STRLEN offset;

int code = 0;

U8 *s;

STRLEN slen;

SV *tmp;

INIT:

SvGETMAGIC(src);

SvGETMAGIC(check_sv);

check = SvROK(check_sv) ? ENCODE_PERLQQ|ENCODE_LEAVE_SRC : SvOK(check_sv) ? SvIV_nomg(check_sv) : 0;

fallback_cb = SvROK(check_sv) ? check_sv : &PL_sv_undef;

modify = (check && !(check & ENCODE_LEAVE_SRC));

enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));

offset = (STRLEN)SvIV(off);

CODE:

if (!SvOK(src))

XSRETURN_NO;

s = modify ? (U8 *)SvPV_force_nomg(src, slen) : (U8 *)SvPV_nomg(src, slen);

if (SvUTF8(src))

utf8_safe_downgrade(aTHX_ &src, &s, &slen, modify);

tmp = encode_method(aTHX_ enc, enc->t_utf8, src, s, slen, check,

&offset, term, &code, fallback_cb);

sv_catsv(dst, tmp);

SvREFCNT_dec(tmp);

SvIV_set(off, (IV)offset);

RETVAL = (code == ENCODE_FOUND_TERM);

OUTPUT:

RETVAL

SV *

Method_decode(obj,src,check_sv = &PL_sv_no)

SV * obj

SV * src

SV * check_sv

PREINIT:

IV check;

SV *fallback_cb;

bool modify;

encode_t *enc;

U8 *s;

STRLEN slen;

INIT:

SvGETMAGIC(src);

SvGETMAGIC(check_sv);

check = SvROK(check_sv) ? ENCODE_PERLQQ|ENCODE_LEAVE_SRC : SvOK(check_sv) ? SvIV_nomg(check_sv) : 0;

fallback_cb = SvROK(check_sv) ? check_sv : &PL_sv_undef;

modify = (check && !(check & ENCODE_LEAVE_SRC));

enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));

CODE:

if (!SvOK(src))

XSRETURN_UNDEF;

s = modify ? (U8 *)SvPV_force_nomg(src, slen) : (U8 *)SvPV_nomg(src, slen);

if (SvUTF8(src))

utf8_safe_downgrade(aTHX_ &src, &s, &slen, modify);

RETVAL = encode_method(aTHX_ enc, enc->t_utf8, src, s, slen, check,

NULL, Nullsv, NULL, fallback_cb);

SvUTF8_on(RETVAL);

OUTPUT:

RETVAL

SV *

Method_encode(obj,src,check_sv = &PL_sv_no)

SV * obj

SV * src

SV * check_sv

PREINIT:

IV check;

SV *fallback_cb;

bool modify;

encode_t *enc;

U8 *s;

STRLEN slen;

INIT:

SvGETMAGIC(src);

SvGETMAGIC(check_sv);

check = SvROK(check_sv) ? ENCODE_PERLQQ|ENCODE_LEAVE_SRC : SvOK(check_sv) ? SvIV_nomg(check_sv) : 0;

fallback_cb = SvROK(check_sv) ? check_sv : &PL_sv_undef;

modify = (check && !(check & ENCODE_LEAVE_SRC));

enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));

CODE:

if (!SvOK(src))

XSRETURN_UNDEF;

s = modify ? (U8 *)SvPV_force_nomg(src, slen) : (U8 *)SvPV_nomg(src, slen);

if (!SvUTF8(src))

utf8_safe_upgrade(aTHX_ &src, &s, &slen, modify);

RETVAL = encode_method(aTHX_ enc, enc->f_utf8, src, s, slen, check,

NULL, Nullsv, NULL, fallback_cb);

OUTPUT:

RETVAL

bool

Method_needs_lines(obj)

SV * obj

CODE:

PERL_UNUSED_VAR(obj);

RETVAL = FALSE;

OUTPUT:

RETVAL

bool

Method_perlio_ok(obj)

SV * obj

PREINIT:

SV *sv;

CODE:

PERL_UNUSED_VAR(obj);

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

RETVAL = SvTRUE(sv);

OUTPUT:

RETVAL

SV *

Method_mime_name(obj)

SV * obj

PREINIT:

encode_t *enc;

INIT:

enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));

CODE:

ENTER;

SAVETMPS;

PUSHMARK(sp);

XPUSHs(sv_2mortal(newSVpvn(enc->name[0], strlen(enc->name[0]))));

PUTBACK;

call_pv("Encode::MIME::Name::get_mime_name", G_SCALAR);

SPAGAIN;

RETVAL = newSVsv(POPs);

PUTBACK;

FREETMPS;

LEAVE;

OUTPUT:

RETVAL

MODULE = Encode PACKAGE = Encode

PROTOTYPES: ENABLE

bool

is_utf8(sv, check = 0)

SV * sv

int check

PREINIT:

char *str;

STRLEN len;

CODE:

SvGETMAGIC(sv); /* SvGETMAGIC() can modify SvOK flag */

str = SvOK(sv) ? SvPV_nomg(sv, len) : NULL; /* SvPV() can modify SvUTF8 flag */

RETVAL = SvUTF8(sv) ? TRUE : FALSE;

if (RETVAL && check && (!str || !is_utf8_string((U8 *)str, len)))

RETVAL = FALSE;

OUTPUT:

RETVAL

SV *

_utf8_on(sv)

SV * sv

CODE:

SvGETMAGIC(sv);

if (!SvTAINTED(sv) && SvPOKp(sv)) {

if (SvTHINKFIRST(sv)) sv_force_normal(sv);

RETVAL = boolSV(SvUTF8(sv));

SvUTF8_on(sv);

SvSETMAGIC(sv);

} else {

RETVAL = &PL_sv_undef;

}

OUTPUT:

RETVAL

SV *

_utf8_off(sv)

SV * sv

CODE:

SvGETMAGIC(sv);

if (!SvTAINTED(sv) && SvPOKp(sv)) {

if (SvTHINKFIRST(sv)) sv_force_normal(sv);

RETVAL = boolSV(SvUTF8(sv));

SvUTF8_off(sv);

SvSETMAGIC(sv);

} else {

RETVAL = &PL_sv_undef;

}

OUTPUT:

RETVAL

SV *

decode(encoding, octets, check = NULL)

SV * encoding

SV * octets

SV * check

ALIAS:

bytes2str = 0

PREINIT:

SV *obj;

INIT:

SvGETMAGIC(encoding);

CODE:

if (!SvOK(encoding))

croak("Encoding name should not be undef");

obj = find_encoding(aTHX_ encoding);

if (!SvOK(obj))

croak("Unknown encoding '%" SVf "'", SVfARG(encoding));

RETVAL = call_encoding(aTHX_ "decode", obj, octets, check);

OUTPUT:

RETVAL

SV *

encode(encoding, string, check = NULL)

SV * encoding

SV * string

SV * check