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Encode.xs
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Encode.xs
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/*
$Id: Encode.xs,v 2.51 2021/10/08 15:29:23 dankogai Exp $
*/
#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 = sv_2mortal(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_uvchr(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);
SvIV_set(off, (IV)offset);
RETVAL = (code == ENCODE_FOUND_TERM);
OUTPUT:
RETVAL
void
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;
SV *ret;
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);
ret = encode_method(aTHX_ enc, enc->t_utf8, src, s, slen, check,
NULL, Nullsv, NULL, fallback_cb);
SvUTF8_on(ret);
ST(0) = ret;
XSRETURN(1);
void
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;
SV *ret;
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);
ret = encode_method(aTHX_ enc, enc->f_utf8, src, s, slen, check,
NULL, Nullsv, NULL, fallback_cb);
ST(0) = ret;
XSRETURN(1);
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:
PERL_UNUSED_VAR(ix);
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