/*
$Id: Encode.xs,v 2.39 2016/11/29 23:29:23 dankogai Exp dankogai $
*/
#define PERL_NO_GET_CONTEXT
#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
#define UNIMPLEMENTED(x,y) static y x (SV *sv, char *encoding) { \
Perl_croak_nocontext("panic_unimplemented"); \
PERL_UNUSED_VAR(sv); \
PERL_UNUSED_VAR(encoding); \
return (y)0; /* fool picky compilers */ \
}
/**/
UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)
#ifndef SvIV_nomg
#define SvIV_nomg SvIV
#endif
#ifdef UTF8_DISALLOW_ILLEGAL_INTERCHANGE
# define UTF8_ALLOW_STRICT UTF8_DISALLOW_ILLEGAL_INTERCHANGE
#else
# define UTF8_ALLOW_STRICT 0
#endif
#define UTF8_ALLOW_NONSTRICT (UTF8_ALLOW_ANY & \
~(UTF8_ALLOW_CONTINUATION | \
UTF8_ALLOW_NON_CONTINUATION | \
UTF8_ALLOW_LONG))
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
call_failure(SV * routine, U8 * done, U8 * dest, U8 * orig)
{
/* Exists for breakpointing */
PERL_UNUSED_VAR(routine);
PERL_UNUSED_VAR(done);
PERL_UNUSED_VAR(dest);
PERL_UNUSED_VAR(orig);
}
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"
static SV *
do_fallback_cb(pTHX_ UV ch, SV *fallback_cb)
{
dSP;
int argc;
SV *retval = newSVpv("",0);
ENTER;
SAVETMPS;
PUSHMARK(sp);
XPUSHs(sv_2mortal(newSVnv((UV)ch)));
PUTBACK;
argc = call_sv(fallback_cb, G_SCALAR);
SPAGAIN;
if (argc != 1){
croak("fallback sub must return scalar!");
}
sv_catsv(retval, POPs);
PUTBACK;
FREETMPS;
LEAVE;
return retval;
}
static SV *
encode_method(pTHX_ const encode_t * enc, const encpage_t * dir, SV * src, U8 * s, STRLEN slen,
int check, STRLEN * offset, SV * term, int * retcode,
SV *fallback_cb)
{
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 (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|ENCODE_HTMLCREF|ENCODE_XMLCREF)){
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);
SvUTF8_off(subchar); /* make sure no decoded string gets in */
sdone += slen + clen;
ddone += dlen + SvCUR(subchar);
sv_catsv(dst, subchar);
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 (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* subchar =
(fallback_cb != &PL_sv_undef)
? do_fallback_cb(aTHX_ (UV)s[slen], fallback_cb)
: newSVpvf("\\x%02" UVXf, (UV)s[slen]);
sdone += slen + 1;
ddone += dlen + SvCUR(subchar);
sv_catsv(dst, subchar);
SvREFCNT_dec(subchar);
} 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);
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) > 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
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);
}
/*
* https://github.com/dankogai/p5-encode/pull/56#issuecomment-231959126
*/
#ifndef UNICODE_IS_NONCHAR
#define UNICODE_IS_NONCHAR(c) ((c >= 0xFDD0 && c <= 0xFDEF) || (c & 0xFFFE) == 0xFFFE)
#endif
#ifndef UNICODE_IS_SUPER
#define UNICODE_IS_SUPER(c) (c > PERL_UNICODE_MAX)
#endif
#define UNICODE_IS_STRICT(c) (!UNICODE_IS_SURROGATE(c) && !UNICODE_IS_NONCHAR(c) && !UNICODE_IS_SUPER(c))
#ifndef UTF_ACCUMULATION_OVERFLOW_MASK
#ifndef CHARBITS
#define CHARBITS CHAR_BIT
#endif
#define UTF_ACCUMULATION_OVERFLOW_MASK (((UV) UTF_CONTINUATION_MASK) << ((sizeof(UV) * CHARBITS) - UTF_ACCUMULATION_SHIFT))
#endif
/*
* Convert non strict utf8 sequence of len >= 2 to unicode codepoint
*/
static UV
convert_utf8_multi_seq(U8* s, STRLEN len, STRLEN *rlen)
{
UV uv;
U8 *ptr = s;
bool overflowed = 0;
uv = NATIVE_TO_UTF(*s) & UTF_START_MASK(len);
len--;
s++;
while (len--) {
if (!UTF8_IS_CONTINUATION(*s)) {
*rlen = s-ptr;
return 0;
}
if (uv & UTF_ACCUMULATION_OVERFLOW_MASK)
overflowed = 1;
uv = UTF8_ACCUMULATE(uv, *s);
s++;
}
*rlen = s-ptr;
if (overflowed || *rlen > (STRLEN)UNISKIP(uv)) {
*rlen = 1;
return 0;
}
return uv;
}
static U8*
process_utf8(pTHX_ SV* dst, U8* s, U8* e, SV *check_sv,
bool encode, bool strict, bool stop_at_partial)
{
UV uv;
STRLEN ulen;
SV *fallback_cb;
int check;
U8 *d;
STRLEN dlen;
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);
while (s < e) {
if (UTF8_IS_INVARIANT(*s)) {
*d++ = *s++;
continue;
}
ulen = 1;
if (UTF8_IS_START(*s)) {
U8 skip = UTF8SKIP(s);
if ((s + skip) > e) {
if (stop_at_partial || (check & ENCODE_STOP_AT_PARTIAL)) {
const U8 *p = s + 1;
for (; p < e; p++) {
if (!UTF8_IS_CONTINUATION(*p)) {
ulen = p-s;
goto malformed_byte;
}
}
break;
}
ulen = e-s;
goto malformed_byte;
}
uv = convert_utf8_multi_seq(s, skip, &ulen);
if (uv == 0)
goto malformed_byte;
else if (strict && !UNICODE_IS_STRICT(uv))
goto malformed;
/* Whole char is good */
memcpy(d, s, skip);
d += skip;
s += skip;
continue;
}
/* If we get here there is something wrong with alleged UTF-8 */
malformed_byte:
uv = (UV)*s;
if (ulen == 0)
ulen = 1;
malformed:
if (check & ENCODE_DIE_ON_ERR){
if (encode)
Perl_croak(aTHX_ ERR_ENCODE_NOMAP, uv, "utf8");
else
Perl_croak(aTHX_ ERR_DECODE_NOMAP, "utf8", uv);
}
if (check & ENCODE_WARN_ON_ERR){
if (encode)
Perl_warner(aTHX_ packWARN(WARN_UTF8),
ERR_ENCODE_NOMAP, uv, "utf8");
else
Perl_warner(aTHX_ packWARN(WARN_UTF8),
ERR_DECODE_NOMAP, "utf8", uv);
}
if (check & ENCODE_RETURN_ON_ERR) {
break;
}
if (check & (ENCODE_PERLQQ|ENCODE_HTMLCREF|ENCODE_XMLCREF)){
SV* 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);
if (encode){
SvUTF8_off(subchar); /* make sure no decoded string gets in */
}
dlen += SvCUR(subchar) - ulen;
SvCUR_set(dst, d-(U8 *)SvPVX(dst));
*SvEND(dst) = '\0';
sv_catsv(dst, subchar);
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;
}
MODULE = Encode PACKAGE = Encode::utf8 PREFIX = Method_
PROTOTYPES: DISABLE
void
Method_decode_xs(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;
int check;
bool modify;
INIT:
SvGETMAGIC(src);
SvGETMAGIC(check_sv);
check = SvROK(check_sv) ? ENCODE_PERLQQ|ENCODE_LEAVE_SRC : SvIV_nomg(check_sv);
modify = (check && !(check & ENCODE_LEAVE_SRC));
CODE:
{
dSP;
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;
if (slen) {
sv_setpvn(src, (char*)s, slen);
}
SvCUR_set(src, slen);
SvSETMAGIC(src);
}
SvUTF8_on(dst);
if (SvTAINTED(src)) SvTAINTED_on(dst); /* propagate taintedness */
ST(0) = dst;
XSRETURN(1);
}
void
Method_encode_xs(obj,src,check_sv = &PL_sv_no)
SV * obj
SV * src
SV * check_sv
PREINIT:
STRLEN slen;
U8 *s;
U8 *e;
SV *dst;
int check;
bool modify;
INIT:
SvGETMAGIC(src);
SvGETMAGIC(check_sv);
check = SvROK(check_sv) ? ENCODE_PERLQQ|ENCODE_LEAVE_SRC : SvIV_nomg(check_sv);
modify = (check && !(check & ENCODE_LEAVE_SRC));
CODE:
{
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;
if (slen) {
sv_setpvn(src, (char*)s, slen);
}
SvCUR_set(src, 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: ENABLE
void
Method_renew(obj)
SV * obj
CODE:
{
PERL_UNUSED_VAR(obj);
XSRETURN(1);
}
int
Method_renewed(obj)
SV * obj
CODE:
RETVAL = 0;
PERL_UNUSED_VAR(obj);
OUTPUT:
RETVAL
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_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:
int 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 : SvIV_nomg(check_sv);
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);
if (code == ENCODE_FOUND_TERM) {
ST(0) = &PL_sv_yes;
}else{
ST(0) = &PL_sv_no;
}
XSRETURN(1);
}
SV *
Method_decode(obj,src,check_sv = &PL_sv_no)
SV * obj
SV * src
SV * check_sv
PREINIT:
int 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 : SvIV_nomg(check_sv);
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:
int 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 : SvIV_nomg(check_sv);
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
void
Method_needs_lines(obj)
SV * obj
CODE:
{
/* encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj))); */
PERL_UNUSED_VAR(obj);
ST(0) = &PL_sv_no;
XSRETURN(1);
}
void
Method_perlio_ok(obj)
SV * obj
PREINIT:
SV *sv;
CODE:
{
/* encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj))); */
/* require_pv(PERLIO_FILENAME); */
PERL_UNUSED_VAR(obj);
eval_pv("require PerlIO::encoding", 0);
SPAGAIN;
sv = get_sv("@", 0);
if (SvTRUE(sv)) {
ST(0) = &PL_sv_no;
}else{
ST(0) = &PL_sv_yes;
}
XSRETURN(1);
}
void
Method_mime_name(obj)
SV * obj
PREINIT:
SV *sv;
CODE:
{
encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
SV *retval;
eval_pv("require Encode::MIME::Name", 0);
SPAGAIN;
sv = get_sv("@", 0);
if (SvTRUE(sv)) {
ST(0) = &PL_sv_undef;
}else{
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;
/* enc->name[0] */
ST(0) = retval;
}
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 = s;
U8 *send = s + len;
U8 *d0;
New(83, dest, len, U8); /* I think */
d0 = dest;
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;
}
}
RETVAL = dest - d0;
sv_usepvn(sv, (char *)dest, RETVAL);
SvUTF8_off(sv);
} else {
RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
}
}
}
OUTPUT:
RETVAL
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 = newSViv(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 = newSViv(SvUTF8(sv));
SvUTF8_off(sv);
SvSETMAGIC(sv);
} else {
RETVAL = &PL_sv_undef;
}
}
OUTPUT:
RETVAL
BOOT:
{
HV *stash = gv_stashpvn("Encode", strlen("Encode"), GV_ADD);
newCONSTSUB(stash, "DIE_ON_ERR", newSViv(ENCODE_DIE_ON_ERR));
newCONSTSUB(stash, "WARN_ON_ERR", newSViv(ENCODE_WARN_ON_ERR));
newCONSTSUB(stash, "RETURN_ON_ERR", newSViv(ENCODE_RETURN_ON_ERR));
newCONSTSUB(stash, "LEAVE_SRC", newSViv(ENCODE_LEAVE_SRC));
newCONSTSUB(stash, "PERLQQ", newSViv(ENCODE_PERLQQ));
newCONSTSUB(stash, "HTMLCREF", newSViv(ENCODE_HTMLCREF));
newCONSTSUB(stash, "XMLCREF", newSViv(ENCODE_XMLCREF));
newCONSTSUB(stash, "STOP_AT_PARTIAL", newSViv(ENCODE_STOP_AT_PARTIAL));
newCONSTSUB(stash, "FB_DEFAULT", newSViv(ENCODE_FB_DEFAULT));
newCONSTSUB(stash, "FB_CROAK", newSViv(ENCODE_FB_CROAK));
newCONSTSUB(stash, "FB_QUIET", newSViv(ENCODE_FB_QUIET));
newCONSTSUB(stash, "FB_WARN", newSViv(ENCODE_FB_WARN));
newCONSTSUB(stash, "FB_PERLQQ", newSViv(ENCODE_FB_PERLQQ));
newCONSTSUB(stash, "FB_HTMLCREF", newSViv(ENCODE_FB_HTMLCREF));
newCONSTSUB(stash, "FB_XMLCREF", newSViv(ENCODE_FB_XMLCREF));
}
{
#include "def_t.exh"
}