mirror of
https://github.com/Perl/perl5.git
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563 lines
11 KiB
Plaintext
563 lines
11 KiB
Plaintext
/*
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$Id: Encode.xs,v 1.43 2002/05/01 05:41:06 dankogai Exp dankogai $
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*/
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#define PERL_NO_GET_CONTEXT
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#include "EXTERN.h"
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#include "perl.h"
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#include "XSUB.h"
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#define U8 U8
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#include "encode.h"
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# define PERLIO_MODNAME "PerlIO::encoding"
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# define PERLIO_FILENAME "PerlIO/encoding.pm"
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/* set 1 or more to profile. t/encoding.t dumps core because of
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Perl_warner and PerlIO don't work well */
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#define ENCODE_XS_PROFILE 0
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/* set 0 to disable floating point to calculate buffer size for
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encode_method(). 1 is recommended. 2 restores NI-S original */
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#define ENCODE_XS_USEFP 1
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#define UNIMPLEMENTED(x,y) y x (SV *sv, char *encoding) {dTHX; \
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Perl_croak(aTHX_ "panic_unimplemented"); \
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return (y)0; /* fool picky compilers */ \
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}
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/**/
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UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
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UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)
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void
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Encode_XSEncoding(pTHX_ encode_t * enc)
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{
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dSP;
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HV *stash = gv_stashpv("Encode::XS", TRUE);
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SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))), stash);
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int i = 0;
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PUSHMARK(sp);
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XPUSHs(sv);
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while (enc->name[i]) {
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const char *name = enc->name[i++];
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XPUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
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}
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PUTBACK;
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call_pv("Encode::define_encoding", G_DISCARD);
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SvREFCNT_dec(sv);
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}
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void
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call_failure(SV * routine, U8 * done, U8 * dest, U8 * orig)
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{
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/* Exists for breakpointing */
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}
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static SV *
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encode_method(pTHX_ encode_t * enc, encpage_t * dir, SV * src,
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int check)
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{
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STRLEN slen;
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U8 *s = (U8 *) SvPV(src, slen);
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STRLEN tlen = slen;
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STRLEN ddone = 0;
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STRLEN sdone = 0;
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/* We allocate slen+1.
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PerlIO dumps core if this value is smaller than this. */
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SV *dst = sv_2mortal(newSV(slen+1));
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U8 *d = (U8 *)SvPVX(dst);
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STRLEN dlen = SvLEN(dst)-1;
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int code;
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if (!slen){
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SvCUR_set(dst, 0);
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SvPOK_only(dst);
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goto ENCODE_END;
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}
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while (code = do_encode(dir, s, &slen, d, dlen, &dlen, !check))
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{
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SvCUR_set(dst, dlen+ddone);
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SvPOK_only(dst);
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if (code == ENCODE_FALLBACK || code == ENCODE_PARTIAL){
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break;
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}
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switch (code) {
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case ENCODE_NOSPACE:
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{
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STRLEN more = 0; /* make sure you initialize! */
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STRLEN sleft;
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sdone += slen;
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ddone += dlen;
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sleft = tlen - sdone;
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#if ENCODE_XS_PROFILE >= 2
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Perl_warn(aTHX_
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"more=%d, sdone=%d, sleft=%d, SvLEN(dst)=%d\n",
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more, sdone, sleft, SvLEN(dst));
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#endif
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if (sdone != 0) { /* has src ever been processed ? */
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#if ENCODE_XS_USEFP == 2
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more = (1.0*tlen*SvLEN(dst)+sdone-1)/sdone
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- SvLEN(dst);
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#elif ENCODE_XS_USEFP
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more = (1.0*SvLEN(dst)+1)/sdone * sleft;
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#else
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/* safe until SvLEN(dst) == MAX_INT/16 */
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more = (16*SvLEN(dst)+1)/sdone/16 * sleft;
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#endif
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}
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more += UTF8_MAXLEN; /* insurance policy */
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d = (U8 *) SvGROW(dst, SvLEN(dst) + more);
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/* dst need to grow need MORE bytes! */
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if (ddone >= SvLEN(dst)) {
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Perl_croak(aTHX_ "Destination couldn't be grown.");
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}
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dlen = SvLEN(dst)-ddone-1;
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d += ddone;
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s += slen;
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slen = tlen-sdone;
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continue;
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}
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case ENCODE_NOREP:
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/* encoding */
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if (dir == enc->f_utf8) {
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STRLEN clen;
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UV ch =
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utf8n_to_uvuni(s+slen, (SvCUR(src)-slen),
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&clen, UTF8_ALLOW_ANY|UTF8_CHECK_ONLY);
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if (check & ENCODE_DIE_ON_ERR) {
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Perl_croak(
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aTHX_ "\"\\N{U+%" UVxf "}\" does not map to %s",
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(UV)ch, enc->name[0]);
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return &PL_sv_undef; /* never reaches but be safe */
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}
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if (check & ENCODE_WARN_ON_ERR){
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Perl_warner(aTHX_ packWARN(WARN_UTF8),
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"\"\\N{U+%" UVxf "}\" does not map to %s",
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(UV)ch, enc->name[0]);
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}
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if (check & ENCODE_RETURN_ON_ERR){
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goto ENCODE_SET_SRC;
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}
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if (check & ENCODE_PERLQQ){
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SV* perlqq =
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sv_2mortal(newSVpvf("\\x{%04"UVxf"}", (UV)ch));
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sdone += slen + clen;
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ddone += dlen + SvCUR(perlqq);
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sv_catsv(dst, perlqq);
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}else if (check & ENCODE_HTMLCREF){
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SV* htmlcref =
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sv_2mortal(newSVpvf("&#%" UVuf ";", (UV)ch));
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sdone += slen + clen;
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ddone += dlen + SvCUR(htmlcref);
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sv_catsv(dst, htmlcref);
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}else if (check & ENCODE_XMLCREF){
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SV* xmlcref =
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sv_2mortal(newSVpvf("&#x%" UVxf ";", (UV)ch));
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sdone += slen + clen;
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ddone += dlen + SvCUR(xmlcref);
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sv_catsv(dst, xmlcref);
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} else {
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/* fallback char */
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sdone += slen + clen;
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ddone += dlen + enc->replen;
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sv_catpvn(dst, (char*)enc->rep, enc->replen);
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}
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}
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/* decoding */
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else {
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if (check & ENCODE_DIE_ON_ERR){
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Perl_croak(
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aTHX_ "%s \"\\x%02" UVXf
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"\" does not map to Unicode (%d)",
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(UV)enc->name[0], (U8)s[slen], code);
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return &PL_sv_undef; /* never reaches but be safe */
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}
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if (check & ENCODE_WARN_ON_ERR){
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Perl_warner(
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aTHX_ packWARN(WARN_UTF8),
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"%s \"\\x%02" UVXf
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"\" does not map to Unicode (%d)",
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(UV)enc->name[0], (U8)s[slen], code);
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}
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if (check & ENCODE_RETURN_ON_ERR){
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goto ENCODE_SET_SRC;
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}
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if (check &
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(ENCODE_PERLQQ|ENCODE_HTMLCREF|ENCODE_XMLCREF)){
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SV* perlqq =
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sv_2mortal(newSVpvf("\\x%02" UVXf, (UV)s[slen]));
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sdone += slen + 1;
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ddone += dlen + SvCUR(perlqq);
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sv_catsv(dst, perlqq);
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} else {
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sdone += slen + 1;
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ddone += dlen + strlen(FBCHAR_UTF8);
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sv_catpv(dst, FBCHAR_UTF8);
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}
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}
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/* settle variables when fallback */
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d = (U8 *)SvEND(dst);
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dlen = SvLEN(dst) - ddone - 1;
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s = (U8*)SvPVX(src) + sdone;
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slen = tlen - sdone;
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break;
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default:
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Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
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code, (dir == enc->f_utf8) ? "to" : "from",
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enc->name[0]);
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return &PL_sv_undef;
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}
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}
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ENCODE_SET_SRC:
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if (check && !(check & ENCODE_LEAVE_SRC)){
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sdone = SvCUR(src) - (slen+sdone);
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if (sdone) {
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sv_setpvn(src, (char*)s+slen, sdone);
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}
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SvCUR_set(src, sdone);
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}
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/* warn("check = 0x%X, code = 0x%d\n", check, code); */
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SvCUR_set(dst, dlen+ddone);
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SvPOK_only(dst);
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#if ENCODE_XS_PROFILE
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if (SvCUR(dst) > SvCUR(src)){
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Perl_warn(aTHX_
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"SvLEN(dst)=%d, SvCUR(dst)=%d. %d bytes unused(%f %%)\n",
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SvLEN(dst), SvCUR(dst), SvLEN(dst) - SvCUR(dst),
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(SvLEN(dst) - SvCUR(dst))*1.0/SvLEN(dst)*100.0);
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}
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#endif
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ENCODE_END:
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*SvEND(dst) = '\0';
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return dst;
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}
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MODULE = Encode PACKAGE = Encode::XS PREFIX = Method_
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PROTOTYPES: ENABLE
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void
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Method_name(obj)
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SV * obj
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CODE:
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{
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encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
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ST(0) = sv_2mortal(newSVpvn(enc->name[0],strlen(enc->name[0])));
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XSRETURN(1);
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}
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void
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Method_decode(obj,src,check = 0)
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SV * obj
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SV * src
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int check
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CODE:
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{
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encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
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ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
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SvUTF8_on(ST(0));
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XSRETURN(1);
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}
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void
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Method_encode(obj,src,check = 0)
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SV * obj
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SV * src
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int check
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CODE:
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{
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encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
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sv_utf8_upgrade(src);
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ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
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XSRETURN(1);
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}
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void
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Method_needs_lines(obj)
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SV * obj
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CODE:
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{
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encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
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ST(0) = &PL_sv_no;
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XSRETURN(1);
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}
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void
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Method_perlio_ok(obj)
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SV * obj
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CODE:
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{
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encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
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/* require_pv(PERLIO_FILENAME); */
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eval_pv("require PerlIO::encoding", 0);
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if (SvTRUE(get_sv("@", 0))) {
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ST(0) = &PL_sv_no;
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}else{
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ST(0) = &PL_sv_yes;
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}
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XSRETURN(1);
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}
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MODULE = Encode PACKAGE = Encode
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PROTOTYPES: ENABLE
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I32
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_bytes_to_utf8(sv, ...)
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SV * sv
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CODE:
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{
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SV * encoding = items == 2 ? ST(1) : Nullsv;
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if (encoding)
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RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
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else {
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STRLEN len;
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U8* s = (U8*)SvPV(sv, len);
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U8* converted;
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converted = bytes_to_utf8(s, &len); /* This allocs */
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sv_setpvn(sv, (char *)converted, len);
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SvUTF8_on(sv); /* XXX Should we? */
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Safefree(converted); /* ... so free it */
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RETVAL = len;
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}
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}
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OUTPUT:
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RETVAL
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I32
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_utf8_to_bytes(sv, ...)
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SV * sv
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CODE:
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{
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SV * to = items > 1 ? ST(1) : Nullsv;
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SV * check = items > 2 ? ST(2) : Nullsv;
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if (to) {
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RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
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} else {
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STRLEN len;
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U8 *s = (U8*)SvPV(sv, len);
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RETVAL = 0;
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if (SvTRUE(check)) {
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/* Must do things the slow way */
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U8 *dest;
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/* We need a copy to pass to check() */
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U8 *src = (U8*)savepv((char *)s);
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U8 *send = s + len;
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New(83, dest, len, U8); /* I think */
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while (s < send) {
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if (*s < 0x80){
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*dest++ = *s++;
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} else {
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STRLEN ulen;
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UV uv = *s++;
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/* Have to do it all ourselves because of error routine,
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aargh. */
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if (!(uv & 0x40)){ goto failure; }
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if (!(uv & 0x20)) { ulen = 2; uv &= 0x1f; }
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else if (!(uv & 0x10)) { ulen = 3; uv &= 0x0f; }
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else if (!(uv & 0x08)) { ulen = 4; uv &= 0x07; }
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else if (!(uv & 0x04)) { ulen = 5; uv &= 0x03; }
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else if (!(uv & 0x02)) { ulen = 6; uv &= 0x01; }
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else if (!(uv & 0x01)) { ulen = 7; uv = 0; }
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else { ulen = 13; uv = 0; }
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/* Note change to utf8.c variable naming, for variety */
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while (ulen--) {
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if ((*s & 0xc0) != 0x80){
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goto failure;
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} else {
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uv = (uv << 6) | (*s++ & 0x3f);
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}
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}
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if (uv > 256) {
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failure:
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call_failure(check, s, dest, src);
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/* Now what happens? */
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}
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*dest++ = (U8)uv;
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}
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}
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} else {
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RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
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}
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}
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}
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OUTPUT:
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RETVAL
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bool
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is_utf8(sv, check = 0)
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SV * sv
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int check
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CODE:
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{
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if (SvGMAGICAL(sv)) /* it could be $1, for example */
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sv = newSVsv(sv); /* GMAGIG will be done */
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if (SvPOK(sv)) {
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RETVAL = SvUTF8(sv) ? TRUE : FALSE;
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if (RETVAL &&
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check &&
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!is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
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RETVAL = FALSE;
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} else {
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RETVAL = FALSE;
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}
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if (sv != ST(0))
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SvREFCNT_dec(sv); /* it was a temp copy */
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}
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OUTPUT:
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RETVAL
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SV *
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_utf8_on(sv)
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SV * sv
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CODE:
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{
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if (SvPOK(sv)) {
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SV *rsv = newSViv(SvUTF8(sv));
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RETVAL = rsv;
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SvUTF8_on(sv);
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} else {
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RETVAL = &PL_sv_undef;
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}
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}
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OUTPUT:
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RETVAL
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SV *
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_utf8_off(sv)
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SV * sv
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CODE:
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{
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if (SvPOK(sv)) {
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SV *rsv = newSViv(SvUTF8(sv));
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RETVAL = rsv;
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SvUTF8_off(sv);
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} else {
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RETVAL = &PL_sv_undef;
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}
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}
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OUTPUT:
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RETVAL
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int
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DIE_ON_ERR()
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CODE:
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RETVAL = ENCODE_DIE_ON_ERR;
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OUTPUT:
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RETVAL
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int
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WARN_ON_ERR()
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CODE:
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RETVAL = ENCODE_WARN_ON_ERR;
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OUTPUT:
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RETVAL
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int
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LEAVE_SRC()
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CODE:
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RETVAL = ENCODE_LEAVE_SRC;
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OUTPUT:
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RETVAL
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int
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RETURN_ON_ERR()
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CODE:
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RETVAL = ENCODE_RETURN_ON_ERR;
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OUTPUT:
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RETVAL
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int
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PERLQQ()
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CODE:
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RETVAL = ENCODE_PERLQQ;
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OUTPUT:
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RETVAL
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int
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HTMLCREF()
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CODE:
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RETVAL = ENCODE_HTMLCREF;
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OUTPUT:
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RETVAL
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int
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XMLCREF()
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CODE:
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RETVAL = ENCODE_XMLCREF;
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OUTPUT:
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RETVAL
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int
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FB_DEFAULT()
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CODE:
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RETVAL = ENCODE_FB_DEFAULT;
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OUTPUT:
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RETVAL
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int
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FB_CROAK()
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CODE:
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RETVAL = ENCODE_FB_CROAK;
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OUTPUT:
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RETVAL
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int
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FB_QUIET()
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CODE:
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RETVAL = ENCODE_FB_QUIET;
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OUTPUT:
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|
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"
|
|
}
|