#include "perliol.h"
typedef struct {
PerlIOBuf base; /* PerlIOBuf stuff */
- SV *bufsv;
- SV *enc;
+ SV *bufsv; /* buffer seen by layers above */
+ SV *dataSV; /* data we have read from layer below */
+ SV *enc; /* the encoding object */
} PerlIOEncode;
SV *
SvREFCNT_dec(e->bufsv);
e->bufsv = Nullsv;
}
+ if (e->dataSV) {
+ SvREFCNT_dec(e->dataSV);
+ e->bufsv = Nullsv;
+ }
return 0;
}
{
PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
dSP;
- IV code;
- code = PerlIOBuf_fill(aTHX_ f);
- if (code == 0) {
+ IV code = 0;
+ PerlIO *n;
+ SSize_t avail;
+ if (PerlIO_flush(f) != 0)
+ return -1;
+ n = PerlIONext(f);
+ if (!PerlIO_fast_gets(n)) {
+ /* Things get too messy if we don't have a buffer layer
+ push a :perlio to do the job */
+ char mode[8];
+ n = PerlIO_push(aTHX_ n, &PerlIO_perlio, PerlIO_modestr(f,mode), Nullsv);
+ if (!n) {
+ Perl_die(aTHX_ "panic: cannot push :perlio for %p",f);
+ }
+ }
+ ENTER;
+ SAVETMPS;
+ retry:
+ avail = PerlIO_get_cnt(n);
+ if (avail <= 0) {
+ avail = PerlIO_fill(n);
+ if (avail == 0) {
+ avail = PerlIO_get_cnt(n);
+ }
+ else {
+ if (!PerlIO_error(n) && PerlIO_eof(n))
+ avail = 0;
+ }
+ }
+ if (avail > 0) {
+ STDCHAR *ptr = PerlIO_get_ptr(n);
+ SSize_t use = avail;
SV *uni;
- STRLEN len;
char *s;
- /* Set SV that is the buffer to be buf..ptr */
- SvCUR_set(e->bufsv, e->base.end - e->base.buf);
- SvUTF8_off(e->bufsv);
- ENTER;
- SAVETMPS;
+ STRLEN len = 0;
+ e->base.ptr = e->base.end = (STDCHAR *) Nullch;
+ (void) PerlIOEncode_get_base(aTHX_ f);
+ if (!e->dataSV)
+ e->dataSV = newSV(0);
+ if (SvTYPE(e->dataSV) < SVt_PV) {
+ sv_upgrade(e->dataSV,SVt_PV);
+ }
+ if (SvCUR(e->dataSV)) {
+ /* something left over from last time - create a normal
+ SV with new data appended
+ */
+ if (use + SvCUR(e->dataSV) > e->base.bufsiz) {
+ use = e->base.bufsiz - SvCUR(e->dataSV);
+ }
+ sv_catpvn(e->dataSV,ptr,use);
+ }
+ else {
+ /* Create a "dummy" SV to represent the available data from layer below */
+ if (SvLEN(e->dataSV) && SvPVX(e->dataSV)) {
+ Safefree(SvPVX(e->dataSV));
+ }
+ if (use > e->base.bufsiz) {
+ use = e->base.bufsiz;
+ }
+ SvPVX(e->dataSV) = (char *) ptr;
+ SvLEN(e->dataSV) = 0; /* Hands off sv.c - it isn't yours */
+ SvCUR_set(e->dataSV,use);
+ SvPOK_on(e->dataSV);
+ }
+ SvUTF8_off(e->dataSV);
PUSHMARK(sp);
XPUSHs(e->enc);
- XPUSHs(e->bufsv);
+ XPUSHs(e->dataSV);
XPUSHs(&PL_sv_yes);
PUTBACK;
- if (perl_call_method("decode", G_SCALAR) != 1)
- code = -1;
+ if (perl_call_method("decode", G_SCALAR) != 1) {
+ Perl_die(aTHX_ "panic: decode did not return a value");
+ }
SPAGAIN;
uni = POPs;
PUTBACK;
- /* Now get translated string (forced to UTF-8) and copy back to buffer
- don't use sv_setsv as that may "steal" PV from returned temp
- and so free() our known-large-enough buffer.
- sv_setpvn() should do but let us do it long hand.
- */
- s = SvPVutf8(uni, len);
- if (s != SvPVX(e->bufsv)) {
- e->base.buf = (STDCHAR *) SvGROW(e->bufsv, len);
- Move(s, e->base.buf, len, char);
- SvCUR_set(e->bufsv, len);
+ /* Now get translated string (forced to UTF-8) and use as buffer */
+ if (SvPOK(uni)) {
+ s = SvPVutf8(uni, len);
+ if (len && !is_utf8_string(s,len)) {
+ Perl_warn(aTHX_ "panic: decode did not return UTF-8 '%.*s'",(int) len,s);
+ }
+ }
+ if (len > 0) {
+ /* Got _something */
+ /* if decode gave us back dataSV then data may vanish when
+ we do ptrcnt adjust - so take our copy now.
+ (The copy is a pain - need a put-it-here option for decode.)
+ */
+ sv_setpvn(e->bufsv,s,len);
+ e->base.ptr = e->base.buf = SvPVX(e->bufsv);
+ e->base.end = e->base.ptr + SvCUR(e->bufsv);
+ PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
+ SvUTF8_on(e->bufsv);
+
+ /* Adjust ptr/cnt not taking anything which
+ did not translate - not clear this is a win */
+ /* compute amount we took */
+ use -= SvCUR(e->dataSV);
+ PerlIO_set_ptrcnt(n, ptr+use, (avail-use));
+ /* and as we did not take it it isn't pending */
+ SvCUR_set(e->dataSV,0);
+ } else {
+ /* Got nothing - assume partial character so we need some more */
+ /* Make sure e->dataSV is a normal SV before re-filling as
+ buffer alias will change under us
+ */
+ s = SvPV(e->dataSV,len);
+ sv_setpvn(e->dataSV,s,len);
+ PerlIO_set_ptrcnt(n, ptr+use, (avail-use));
+ goto retry;
}
- SvUTF8_on(e->bufsv);
- e->base.end = e->base.buf + len;
- e->base.ptr = e->base.buf;
FREETMPS;
LEAVE;
+ return code;
+ }
+ else {
+ if (avail == 0)
+ PerlIOBase(f)->flags |= PERLIO_F_EOF;
+ else
+ PerlIOBase(f)->flags |= PERLIO_F_ERROR;
+ return -1;
}
- return code;
}
IV
{
PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
IV code = 0;
- if (e->bufsv
- && (PerlIOBase(f)->flags & (PERLIO_F_RDBUF | PERLIO_F_WRBUF))
- && (e->base.ptr > e->base.buf)
- ) {
+ if (e->bufsv && (e->base.ptr > e->base.buf)) {
dSP;
SV *str;
char *s;
STRLEN len;
- SSize_t left = 0;
- if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
- /* This is really just a flag to see if we took all the data, if
- we did PerlIOBase_flush avoids a seek to lower layer.
- Need to revisit if we start getting clever with unreads or seeks-in-buffer
- */
- left = e->base.end - e->base.ptr;
+ SSize_t count = 0;
+ if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
+ /* Write case encode the buffer and write() to layer below */
+ ENTER;
+ SAVETMPS;
+ PUSHMARK(sp);
+ XPUSHs(e->enc);
+ SvCUR_set(e->bufsv, e->base.ptr - e->base.buf);
+ SvUTF8_on(e->bufsv);
+ Perl_warn(aTHX_ "flush %_",e->bufsv);
+ XPUSHs(e->bufsv);
+ XPUSHs(&PL_sv_yes);
+ PUTBACK;
+ if (perl_call_method("encode", G_SCALAR) != 1)
+ code = -1;
+ SPAGAIN;
+ str = POPs;
+ PUTBACK;
+ s = SvPV(str, len);
+ count = PerlIO_write(PerlIONext(f),s,len);
+ if (count != len) {
+ code = -1;
+ }
+ FREETMPS;
+ LEAVE;
+ if (PerlIO_flush(PerlIONext(f)) != 0) {
+ code = -1;
+ }
}
- ENTER;
- SAVETMPS;
- PUSHMARK(sp);
- XPUSHs(e->enc);
- SvCUR_set(e->bufsv, e->base.ptr - e->base.buf);
- SvUTF8_on(e->bufsv);
- XPUSHs(e->bufsv);
- XPUSHs(&PL_sv_yes);
- PUTBACK;
- if (perl_call_method("encode", G_SCALAR) != 1)
- code = -1;
- SPAGAIN;
- str = POPs;
- PUTBACK;
- s = SvPV(str, len);
- if (s != SvPVX(e->bufsv)) {
- e->base.buf = (STDCHAR *) SvGROW(e->bufsv, len);
- Move(s, e->base.buf, len, char);
- SvCUR_set(e->bufsv, len);
+ else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
+ /* read case */
+ /* if we have any untranslated stuff then unread that first */
+ if (e->dataSV && SvCUR(e->dataSV)) {
+ s = SvPV(e->dataSV, len);
+ count = PerlIO_unread(PerlIONext(f),s,len);
+ if (count != len) {
+ code = -1;
+ }
+ }
+ /* See if there is anything left in the buffer */
+ if (e->base.ptr < e->base.end) {
+ /* Bother - have unread data.
+ re-encode and unread() to layer below
+ */
+ ENTER;
+ SAVETMPS;
+ str = sv_newmortal();
+ sv_upgrade(str, SVt_PV);
+ SvPVX(str) = e->base.ptr;
+ SvLEN(str) = 0;
+ SvCUR_set(str, e->base.end - e->base.ptr);
+ SvUTF8_on(str);
+ PUSHMARK(sp);
+ XPUSHs(e->enc);
+ XPUSHs(str);
+ XPUSHs(&PL_sv_yes);
+ PUTBACK;
+ if (perl_call_method("encode", G_SCALAR) != 1)
+ code = -1;
+ SPAGAIN;
+ str = POPs;
+ PUTBACK;
+ s = SvPV(str, len);
+ count = PerlIO_unread(PerlIONext(f),s,len);
+ if (count != len) {
+ code = -1;
+ }
+ FREETMPS;
+ LEAVE;
+ }
}
- SvUTF8_off(e->bufsv);
- e->base.ptr = e->base.buf + len;
- /* restore end != ptr as inequality is used by PerlIOBuf_flush in read case */
- e->base.end = e->base.ptr + left;
- FREETMPS;
- LEAVE;
- if (PerlIOBuf_flush(aTHX_ f) != 0)
- code = -1;
+ e->base.ptr = e->base.end = e->base.buf;
+ PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
}
return code;
}
PerlIOEncode_tell(pTHX_ PerlIO * f)
{
PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
- /* Unfortunately the only way to get a postion is to back-translate,
- the UTF8-bytes we have buf..ptr and adjust accordingly.
- But we will try and save any unread data in case stream
- is un-seekable.
+ /* Unfortunately the only way to get a postion is to (re-)translate,
+ the UTF8 we have in bufefr and then ask layer below
*/
- if ((PerlIOBase(f)->flags & PERLIO_F_RDBUF) && b->ptr < b->end) {
- Size_t count = b->end - b->ptr;
- PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
- /* Save what we have left to read */
- PerlIOSelf(f, PerlIOBuf)->bufsiz = count;
- PerlIO_unread(f, b->ptr, count);
- /* There isn't any unread data - we just saved it - so avoid the lower seek */
- b->end = b->ptr;
- /* Flush ourselves - now one layer down,
- this does the back translate and adjusts position
- */
- PerlIO_flush(PerlIONext(f));
- /* Set position of the saved data */
- PerlIOSelf(f, PerlIOBuf)->posn = b->posn;
- }
- else {
- PerlIO_flush(f);
- }
- return b->posn;
+ PerlIO_flush(f);
+ return PerlIO_tell(PerlIONext(f));
}
PerlIO *
{
STRLEN slen;
U8 *s = (U8 *) SvPV(src, slen);
- SV *dst = sv_2mortal(newSV(2 * slen + 1));
+ STRLEN tlen = slen;
+ SV *dst = sv_2mortal(newSV(slen+1));
if (slen) {
- U8 *d = (U8 *) SvGROW(dst, 2 * slen + 1);
- STRLEN dlen = SvLEN(dst);
+ U8 *d = (U8 *) SvPVX(dst);
+ STRLEN dlen = SvLEN(dst)-1;
int code;
while ((code = do_encode(dir, s, &slen, d, dlen, &dlen, !check))) {
SvCUR_set(dst, dlen);
SvPOK_on(dst);
- if (code == ENCODE_FALLBACK)
+#if 0
+ Perl_warn(aTHX_ "code=%d @ s=%d/%d d=%d",code,slen,tlen,dlen);
+#endif
+
+ if (code == ENCODE_FALLBACK || code == ENCODE_PARTIAL)
break;
switch (code) {
case ENCODE_NOSPACE:
{
- STRLEN need = dlen + UTF8_MAXLEN * 128; /* 128 is too big or small? */
+ STRLEN done = tlen-slen;
+ STRLEN need ;
+ if (done) {
+ need = (tlen*dlen)/done+1;
+ }
+ else {
+ need = dlen + UTF8_MAXLEN;
+ }
+
d = (U8 *) SvGROW(dst, need);
if (dlen >= SvLEN(dst)) {
Perl_croak(aTHX_
"Destination couldn't be grown (the need may be miscalculated).");
}
dlen = SvLEN(dst);
- slen = SvCUR(src);
+ slen = tlen;
break;
}
}
break;
- case ENCODE_PARTIAL:
- if (!check && ckWARN_d(WARN_UTF8)) {
- Perl_warner(aTHX_ WARN_UTF8, "Partial %s character",
- (dir ==
- enc->f_utf8) ? "UTF-8" : enc->name[0]);
- }
- return &PL_sv_undef;
-
default:
Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
code, (dir == enc->f_utf8) ? "to" : "from",
Move(s + slen, s, SvCUR(src) - slen, U8);
}
SvCUR_set(src, SvCUR(src) - slen);
+ *SvEND(src) = '\0';
}
}
else {
- SvCUR_set(dst, slen);
+ SvCUR_set(dst, 0);
SvPOK_on(dst);
}
+ *SvEND(dst) = '\0';
return dst;
}
projects / p5sagit/p5-mst-13.2.git / commitdiff