Commit | Line | Data |
918951dd |
1 | /* |
c657f685 |
2 | * $Id: encoding.xs,v 0.3 2002/04/21 22:14:41 dankogai Exp $ |
918951dd |
3 | */ |
4 | |
59035dcc |
5 | #define PERL_NO_GET_CONTEXT |
6 | #include "EXTERN.h" |
7 | #include "perl.h" |
8 | #include "XSUB.h" |
9 | #define U8 U8 |
10 | |
dc54c799 |
11 | #define OUR_DEFAULT_FB "Encode::PERLQQ" |
12 | |
59035dcc |
13 | #if defined(USE_PERLIO) && !defined(USE_SFIO) |
14 | |
15 | /* Define an encoding "layer" in the perliol.h sense. |
16 | |
17 | The layer defined here "inherits" in an object-oriented sense from |
18 | the "perlio" layer with its PerlIOBuf_* "methods". The |
19 | implementation is particularly efficient as until Encode settles |
20 | down there is no point in tryint to tune it. |
21 | |
22 | The layer works by overloading the "fill" and "flush" methods. |
23 | |
24 | "fill" calls "SUPER::fill" in perl terms, then calls the encode OO |
25 | perl API to convert the encoded data to UTF-8 form, then copies it |
26 | back to the buffer. The "base class's" read methods then see the |
27 | UTF-8 data. |
28 | |
29 | "flush" transforms the UTF-8 data deposited by the "base class's |
30 | write method in the buffer back into the encoded form using the |
31 | encode OO perl API, then copies data back into the buffer and calls |
32 | "SUPER::flush. |
33 | |
34 | Note that "flush" is _also_ called for read mode - we still do the |
a6d05634 |
35 | (back)-translate so that the base class's "flush" sees the |
59035dcc |
36 | correct number of encoded chars for positioning the seek |
37 | pointer. (This double translation is the worst performance issue - |
38 | particularly with all-perl encode engine.) |
39 | |
40 | */ |
41 | |
42 | #include "perliol.h" |
43 | |
44 | typedef struct { |
45 | PerlIOBuf base; /* PerlIOBuf stuff */ |
46 | SV *bufsv; /* buffer seen by layers above */ |
47 | SV *dataSV; /* data we have read from layer below */ |
48 | SV *enc; /* the encoding object */ |
918951dd |
49 | SV *chk; /* CHECK in Encode methods */ |
c00aecee |
50 | int flags; /* Flags currently just needs lines */ |
74f6c1ca |
51 | int inEncodeCall; /* trap recursive encode calls */ |
59035dcc |
52 | } PerlIOEncode; |
53 | |
c00aecee |
54 | #define NEEDS_LINES 1 |
918951dd |
55 | |
59035dcc |
56 | SV * |
57 | PerlIOEncode_getarg(pTHX_ PerlIO * f, CLONE_PARAMS * param, int flags) |
58 | { |
59 | PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode); |
60 | SV *sv = &PL_sv_undef; |
61 | if (e->enc) { |
62 | dSP; |
24f59afc |
63 | /* Not 100% sure stack swap is right thing to do during dup ... */ |
64 | PUSHSTACKi(PERLSI_MAGIC); |
65 | SPAGAIN; |
59035dcc |
66 | ENTER; |
67 | SAVETMPS; |
68 | PUSHMARK(sp); |
69 | XPUSHs(e->enc); |
70 | PUTBACK; |
918951dd |
71 | if (call_method("name", G_SCALAR) == 1) { |
59035dcc |
72 | SPAGAIN; |
73 | sv = newSVsv(POPs); |
74 | PUTBACK; |
75 | } |
24f59afc |
76 | FREETMPS; |
77 | LEAVE; |
78 | POPSTACK; |
59035dcc |
79 | } |
80 | return sv; |
81 | } |
82 | |
83 | IV |
2dc2558e |
84 | PerlIOEncode_pushed(pTHX_ PerlIO * f, const char *mode, SV * arg, PerlIO_funcs *tab) |
59035dcc |
85 | { |
86 | PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode); |
87 | dSP; |
2dc2558e |
88 | IV code = PerlIOBuf_pushed(aTHX_ f, mode, Nullsv,tab); |
c00aecee |
89 | SV *result = Nullsv; |
c657f685 |
90 | |
24f59afc |
91 | PUSHSTACKi(PERLSI_MAGIC); |
92 | SPAGAIN; |
93 | |
59035dcc |
94 | ENTER; |
95 | SAVETMPS; |
918951dd |
96 | |
97 | PUSHMARK(sp); |
59035dcc |
98 | XPUSHs(arg); |
99 | PUTBACK; |
918951dd |
100 | if (call_pv("Encode::find_encoding", G_SCALAR) != 1) { |
59035dcc |
101 | /* should never happen */ |
102 | Perl_die(aTHX_ "Encode::find_encoding did not return a value"); |
103 | return -1; |
104 | } |
105 | SPAGAIN; |
c00aecee |
106 | result = POPs; |
59035dcc |
107 | PUTBACK; |
918951dd |
108 | |
c00aecee |
109 | if (!SvROK(result) || !SvOBJECT(SvRV(result))) { |
59035dcc |
110 | e->enc = Nullsv; |
59035dcc |
111 | Perl_warner(aTHX_ packWARN(WARN_IO), "Cannot find encoding \"%" SVf "\"", |
54871a3c |
112 | arg); |
c00aecee |
113 | errno = EINVAL; |
59035dcc |
114 | code = -1; |
115 | } |
116 | else { |
a0d8a30e |
117 | |
118 | /* $enc->renew */ |
c00aecee |
119 | PUSHMARK(sp); |
120 | XPUSHs(result); |
121 | PUTBACK; |
a0d8a30e |
122 | if (call_method("renew",G_SCALAR|G_EVAL) != 1 || SvTRUE(ERRSV)) { |
123 | Perl_warner(aTHX_ packWARN(WARN_IO), "\"%" SVf "\" does not support renew method", |
c00aecee |
124 | arg); |
125 | } |
126 | else { |
127 | SPAGAIN; |
128 | result = POPs; |
129 | PUTBACK; |
130 | } |
c00aecee |
131 | e->enc = newSVsv(result); |
132 | PUSHMARK(sp); |
133 | XPUSHs(e->enc); |
134 | PUTBACK; |
135 | if (call_method("needs_lines",G_SCALAR|G_EVAL) != 1 || SvTRUE(ERRSV)) { |
136 | Perl_warner(aTHX_ packWARN(WARN_IO), "\"%" SVf "\" does not support needs_lines", |
137 | arg); |
138 | } |
139 | else { |
140 | SPAGAIN; |
141 | result = POPs; |
142 | PUTBACK; |
143 | if (SvTRUE(result)) { |
144 | e->flags |= NEEDS_LINES; |
145 | } |
146 | } |
59035dcc |
147 | PerlIOBase(f)->flags |= PERLIO_F_UTF8; |
148 | } |
c00aecee |
149 | |
1982da40 |
150 | e->chk = newSVsv(get_sv("PerlIO::encoding::fallback", 0)); |
74f6c1ca |
151 | e->inEncodeCall = 0; |
54871a3c |
152 | |
59035dcc |
153 | FREETMPS; |
154 | LEAVE; |
24f59afc |
155 | POPSTACK; |
59035dcc |
156 | return code; |
157 | } |
158 | |
159 | IV |
160 | PerlIOEncode_popped(pTHX_ PerlIO * f) |
161 | { |
162 | PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode); |
163 | if (e->enc) { |
164 | SvREFCNT_dec(e->enc); |
165 | e->enc = Nullsv; |
166 | } |
167 | if (e->bufsv) { |
168 | SvREFCNT_dec(e->bufsv); |
169 | e->bufsv = Nullsv; |
170 | } |
171 | if (e->dataSV) { |
172 | SvREFCNT_dec(e->dataSV); |
173 | e->dataSV = Nullsv; |
174 | } |
c00aecee |
175 | if (e->chk) { |
176 | SvREFCNT_dec(e->chk); |
9b683d95 |
177 | e->chk = Nullsv; |
c00aecee |
178 | } |
59035dcc |
179 | return 0; |
180 | } |
181 | |
182 | STDCHAR * |
183 | PerlIOEncode_get_base(pTHX_ PerlIO * f) |
184 | { |
185 | PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode); |
186 | if (!e->base.bufsiz) |
187 | e->base.bufsiz = 1024; |
188 | if (!e->bufsv) { |
189 | e->bufsv = newSV(e->base.bufsiz); |
190 | sv_setpvn(e->bufsv, "", 0); |
191 | } |
192 | e->base.buf = (STDCHAR *) SvPVX(e->bufsv); |
193 | if (!e->base.ptr) |
194 | e->base.ptr = e->base.buf; |
195 | if (!e->base.end) |
196 | e->base.end = e->base.buf; |
197 | if (e->base.ptr < e->base.buf |
198 | || e->base.ptr > e->base.buf + SvLEN(e->bufsv)) { |
199 | Perl_warn(aTHX_ " ptr %p(%p)%p", e->base.buf, e->base.ptr, |
200 | e->base.buf + SvLEN(e->bufsv)); |
201 | abort(); |
202 | } |
203 | if (SvLEN(e->bufsv) < e->base.bufsiz) { |
204 | SSize_t poff = e->base.ptr - e->base.buf; |
205 | SSize_t eoff = e->base.end - e->base.buf; |
206 | e->base.buf = (STDCHAR *) SvGROW(e->bufsv, e->base.bufsiz); |
207 | e->base.ptr = e->base.buf + poff; |
208 | e->base.end = e->base.buf + eoff; |
209 | } |
210 | if (e->base.ptr < e->base.buf |
211 | || e->base.ptr > e->base.buf + SvLEN(e->bufsv)) { |
212 | Perl_warn(aTHX_ " ptr %p(%p)%p", e->base.buf, e->base.ptr, |
213 | e->base.buf + SvLEN(e->bufsv)); |
214 | abort(); |
215 | } |
216 | return e->base.buf; |
217 | } |
218 | |
219 | IV |
220 | PerlIOEncode_fill(pTHX_ PerlIO * f) |
221 | { |
222 | PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode); |
223 | dSP; |
224 | IV code = 0; |
225 | PerlIO *n; |
226 | SSize_t avail; |
c657f685 |
227 | |
59035dcc |
228 | if (PerlIO_flush(f) != 0) |
229 | return -1; |
230 | n = PerlIONext(f); |
231 | if (!PerlIO_fast_gets(n)) { |
232 | /* Things get too messy if we don't have a buffer layer |
233 | push a :perlio to do the job */ |
234 | char mode[8]; |
235 | n = PerlIO_push(aTHX_ n, &PerlIO_perlio, PerlIO_modestr(f,mode), Nullsv); |
236 | if (!n) { |
237 | Perl_die(aTHX_ "panic: cannot push :perlio for %p",f); |
238 | } |
239 | } |
24f59afc |
240 | PUSHSTACKi(PERLSI_MAGIC); |
241 | SPAGAIN; |
59035dcc |
242 | ENTER; |
243 | SAVETMPS; |
244 | retry: |
245 | avail = PerlIO_get_cnt(n); |
246 | if (avail <= 0) { |
247 | avail = PerlIO_fill(n); |
248 | if (avail == 0) { |
249 | avail = PerlIO_get_cnt(n); |
250 | } |
251 | else { |
252 | if (!PerlIO_error(n) && PerlIO_eof(n)) |
253 | avail = 0; |
254 | } |
255 | } |
c00aecee |
256 | if (avail > 0 || (e->flags & NEEDS_LINES)) { |
59035dcc |
257 | STDCHAR *ptr = PerlIO_get_ptr(n); |
c00aecee |
258 | SSize_t use = (avail >= 0) ? avail : 0; |
59035dcc |
259 | SV *uni; |
65e66c80 |
260 | char *s = Nullch; |
59035dcc |
261 | STRLEN len = 0; |
262 | e->base.ptr = e->base.end = (STDCHAR *) Nullch; |
263 | (void) PerlIOEncode_get_base(aTHX_ f); |
264 | if (!e->dataSV) |
265 | e->dataSV = newSV(0); |
266 | if (SvTYPE(e->dataSV) < SVt_PV) { |
267 | sv_upgrade(e->dataSV,SVt_PV); |
268 | } |
c00aecee |
269 | if (e->flags & NEEDS_LINES) { |
270 | /* Encoding needs whole lines (e.g. iso-2022-*) |
271 | search back from end of available data for |
272 | and line marker |
273 | */ |
274 | STDCHAR *nl = ptr+use-1; |
275 | while (nl >= ptr) { |
276 | if (*nl == '\n') { |
277 | break; |
278 | } |
279 | nl--; |
280 | } |
281 | if (nl >= ptr && *nl == '\n') { |
282 | /* found a line - take up to and including that */ |
283 | use = (nl+1)-ptr; |
284 | } |
285 | else if (avail > 0) { |
286 | /* No line, but not EOF - append avail to the pending data */ |
8994bf69 |
287 | sv_catpvn(e->dataSV, (char*)ptr, use); |
c00aecee |
288 | PerlIO_set_ptrcnt(n, ptr+use, 0); |
289 | goto retry; |
290 | } |
291 | else if (!SvCUR(e->dataSV)) { |
292 | goto end_of_file; |
293 | } |
294 | } |
59035dcc |
295 | if (SvCUR(e->dataSV)) { |
296 | /* something left over from last time - create a normal |
297 | SV with new data appended |
298 | */ |
299 | if (use + SvCUR(e->dataSV) > e->base.bufsiz) { |
c00aecee |
300 | if (e->flags & NEEDS_LINES) { |
301 | /* Have to grow buffer */ |
302 | e->base.bufsiz = use + SvCUR(e->dataSV); |
303 | PerlIOEncode_get_base(aTHX_ f); |
304 | } |
305 | else { |
c657f685 |
306 | use = e->base.bufsiz - SvCUR(e->dataSV); |
307 | } |
59035dcc |
308 | } |
309 | sv_catpvn(e->dataSV,(char*)ptr,use); |
310 | } |
311 | else { |
312 | /* Create a "dummy" SV to represent the available data from layer below */ |
aa07b2f6 |
313 | if (SvLEN(e->dataSV) && SvPVX_const(e->dataSV)) { |
94010e71 |
314 | Safefree(SvPVX_mutable(e->dataSV)); |
59035dcc |
315 | } |
7c436af3 |
316 | if (use > (SSize_t)e->base.bufsiz) { |
c00aecee |
317 | if (e->flags & NEEDS_LINES) { |
318 | /* Have to grow buffer */ |
319 | e->base.bufsiz = use; |
320 | PerlIOEncode_get_base(aTHX_ f); |
321 | } |
322 | else { |
c657f685 |
323 | use = e->base.bufsiz; |
324 | } |
59035dcc |
325 | } |
f880fe2f |
326 | SvPV_set(e->dataSV, (char *) ptr); |
b162af07 |
327 | SvLEN_set(e->dataSV, 0); /* Hands off sv.c - it isn't yours */ |
59035dcc |
328 | SvCUR_set(e->dataSV,use); |
329 | SvPOK_only(e->dataSV); |
330 | } |
331 | SvUTF8_off(e->dataSV); |
332 | PUSHMARK(sp); |
333 | XPUSHs(e->enc); |
334 | XPUSHs(e->dataSV); |
918951dd |
335 | XPUSHs(e->chk); |
59035dcc |
336 | PUTBACK; |
918951dd |
337 | if (call_method("decode", G_SCALAR) != 1) { |
59035dcc |
338 | Perl_die(aTHX_ "panic: decode did not return a value"); |
339 | } |
340 | SPAGAIN; |
341 | uni = POPs; |
342 | PUTBACK; |
343 | /* Now get translated string (forced to UTF-8) and use as buffer */ |
344 | if (SvPOK(uni)) { |
345 | s = SvPVutf8(uni, len); |
346 | #ifdef PARANOID_ENCODE_CHECKS |
347 | if (len && !is_utf8_string((U8*)s,len)) { |
348 | Perl_warn(aTHX_ "panic: decode did not return UTF-8 '%.*s'",(int) len,s); |
349 | } |
350 | #endif |
351 | } |
352 | if (len > 0) { |
353 | /* Got _something */ |
354 | /* if decode gave us back dataSV then data may vanish when |
355 | we do ptrcnt adjust - so take our copy now. |
356 | (The copy is a pain - need a put-it-here option for decode.) |
357 | */ |
358 | sv_setpvn(e->bufsv,s,len); |
359 | e->base.ptr = e->base.buf = (STDCHAR*)SvPVX(e->bufsv); |
360 | e->base.end = e->base.ptr + SvCUR(e->bufsv); |
361 | PerlIOBase(f)->flags |= PERLIO_F_RDBUF; |
362 | SvUTF8_on(e->bufsv); |
363 | |
364 | /* Adjust ptr/cnt not taking anything which |
365 | did not translate - not clear this is a win */ |
366 | /* compute amount we took */ |
367 | use -= SvCUR(e->dataSV); |
368 | PerlIO_set_ptrcnt(n, ptr+use, (avail-use)); |
369 | /* and as we did not take it it isn't pending */ |
370 | SvCUR_set(e->dataSV,0); |
371 | } else { |
372 | /* Got nothing - assume partial character so we need some more */ |
373 | /* Make sure e->dataSV is a normal SV before re-filling as |
374 | buffer alias will change under us |
375 | */ |
376 | s = SvPV(e->dataSV,len); |
377 | sv_setpvn(e->dataSV,s,len); |
378 | PerlIO_set_ptrcnt(n, ptr+use, (avail-use)); |
379 | goto retry; |
380 | } |
59035dcc |
381 | } |
382 | else { |
c00aecee |
383 | end_of_file: |
24f59afc |
384 | code = -1; |
59035dcc |
385 | if (avail == 0) |
386 | PerlIOBase(f)->flags |= PERLIO_F_EOF; |
387 | else |
388 | PerlIOBase(f)->flags |= PERLIO_F_ERROR; |
59035dcc |
389 | } |
24f59afc |
390 | FREETMPS; |
391 | LEAVE; |
392 | POPSTACK; |
393 | return code; |
59035dcc |
394 | } |
395 | |
396 | IV |
397 | PerlIOEncode_flush(pTHX_ PerlIO * f) |
398 | { |
399 | PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode); |
400 | IV code = 0; |
c657f685 |
401 | |
b4bd11bc |
402 | if (e->bufsv) { |
59035dcc |
403 | dSP; |
404 | SV *str; |
405 | char *s; |
406 | STRLEN len; |
407 | SSize_t count = 0; |
b4bd11bc |
408 | if ((PerlIOBase(f)->flags & PERLIO_F_WRBUF) && (e->base.ptr > e->base.buf)) { |
74f6c1ca |
409 | if (e->inEncodeCall) return 0; |
b4bd11bc |
410 | /* Write case - encode the buffer and write() to layer below */ |
24f59afc |
411 | PUSHSTACKi(PERLSI_MAGIC); |
412 | SPAGAIN; |
59035dcc |
413 | ENTER; |
414 | SAVETMPS; |
415 | PUSHMARK(sp); |
416 | XPUSHs(e->enc); |
417 | SvCUR_set(e->bufsv, e->base.ptr - e->base.buf); |
418 | SvUTF8_on(e->bufsv); |
419 | XPUSHs(e->bufsv); |
918951dd |
420 | XPUSHs(e->chk); |
59035dcc |
421 | PUTBACK; |
74f6c1ca |
422 | e->inEncodeCall = 1; |
918951dd |
423 | if (call_method("encode", G_SCALAR) != 1) { |
74f6c1ca |
424 | e->inEncodeCall = 0; |
59035dcc |
425 | Perl_die(aTHX_ "panic: encode did not return a value"); |
426 | } |
74f6c1ca |
427 | e->inEncodeCall = 0; |
59035dcc |
428 | SPAGAIN; |
429 | str = POPs; |
430 | PUTBACK; |
431 | s = SvPV(str, len); |
432 | count = PerlIO_write(PerlIONext(f),s,len); |
7c436af3 |
433 | if ((STRLEN)count != len) { |
59035dcc |
434 | code = -1; |
435 | } |
436 | FREETMPS; |
437 | LEAVE; |
24f59afc |
438 | POPSTACK; |
59035dcc |
439 | if (PerlIO_flush(PerlIONext(f)) != 0) { |
440 | code = -1; |
441 | } |
442 | if (SvCUR(e->bufsv)) { |
443 | /* Did not all translate */ |
444 | e->base.ptr = e->base.buf+SvCUR(e->bufsv); |
445 | return code; |
446 | } |
447 | } |
b4bd11bc |
448 | else if ((PerlIOBase(f)->flags & PERLIO_F_RDBUF)) { |
59035dcc |
449 | /* read case */ |
450 | /* if we have any untranslated stuff then unread that first */ |
8849edfd |
451 | /* FIXME - unread is fragile is there a better way ? */ |
59035dcc |
452 | if (e->dataSV && SvCUR(e->dataSV)) { |
453 | s = SvPV(e->dataSV, len); |
454 | count = PerlIO_unread(PerlIONext(f),s,len); |
7c436af3 |
455 | if ((STRLEN)count != len) { |
59035dcc |
456 | code = -1; |
457 | } |
b4bd11bc |
458 | SvCUR_set(e->dataSV,0); |
59035dcc |
459 | } |
460 | /* See if there is anything left in the buffer */ |
461 | if (e->base.ptr < e->base.end) { |
74f6c1ca |
462 | if (e->inEncodeCall) return 0; |
59035dcc |
463 | /* Bother - have unread data. |
464 | re-encode and unread() to layer below |
465 | */ |
24f59afc |
466 | PUSHSTACKi(PERLSI_MAGIC); |
467 | SPAGAIN; |
59035dcc |
468 | ENTER; |
469 | SAVETMPS; |
470 | str = sv_newmortal(); |
471 | sv_upgrade(str, SVt_PV); |
f880fe2f |
472 | SvPV_set(str, (char*)e->base.ptr); |
b162af07 |
473 | SvLEN_set(str, 0); |
59035dcc |
474 | SvCUR_set(str, e->base.end - e->base.ptr); |
475 | SvPOK_only(str); |
476 | SvUTF8_on(str); |
477 | PUSHMARK(sp); |
478 | XPUSHs(e->enc); |
479 | XPUSHs(str); |
918951dd |
480 | XPUSHs(e->chk); |
59035dcc |
481 | PUTBACK; |
74f6c1ca |
482 | e->inEncodeCall = 1; |
918951dd |
483 | if (call_method("encode", G_SCALAR) != 1) { |
74f6c1ca |
484 | e->inEncodeCall = 0; |
485 | Perl_die(aTHX_ "panic: encode did not return a value"); |
59035dcc |
486 | } |
74f6c1ca |
487 | e->inEncodeCall = 0; |
59035dcc |
488 | SPAGAIN; |
489 | str = POPs; |
490 | PUTBACK; |
491 | s = SvPV(str, len); |
492 | count = PerlIO_unread(PerlIONext(f),s,len); |
7c436af3 |
493 | if ((STRLEN)count != len) { |
59035dcc |
494 | code = -1; |
495 | } |
496 | FREETMPS; |
497 | LEAVE; |
24f59afc |
498 | POPSTACK; |
59035dcc |
499 | } |
500 | } |
501 | e->base.ptr = e->base.end = e->base.buf; |
502 | PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF); |
503 | } |
504 | return code; |
505 | } |
506 | |
507 | IV |
508 | PerlIOEncode_close(pTHX_ PerlIO * f) |
509 | { |
510 | PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode); |
b4bd11bc |
511 | IV code; |
512 | if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) { |
513 | /* Discard partial character */ |
514 | if (e->dataSV) { |
515 | SvCUR_set(e->dataSV,0); |
516 | } |
517 | /* Don't back decode and unread any pending data */ |
518 | e->base.ptr = e->base.end = e->base.buf; |
519 | } |
520 | code = PerlIOBase_close(aTHX_ f); |
59035dcc |
521 | if (e->bufsv) { |
b4bd11bc |
522 | /* This should only fire for write case */ |
59035dcc |
523 | if (e->base.buf && e->base.ptr > e->base.buf) { |
524 | Perl_croak(aTHX_ "Close with partial character"); |
525 | } |
526 | SvREFCNT_dec(e->bufsv); |
527 | e->bufsv = Nullsv; |
528 | } |
529 | e->base.buf = NULL; |
530 | e->base.ptr = NULL; |
531 | e->base.end = NULL; |
532 | PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF); |
533 | return code; |
534 | } |
535 | |
536 | Off_t |
537 | PerlIOEncode_tell(pTHX_ PerlIO * f) |
538 | { |
539 | PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf); |
540 | /* Unfortunately the only way to get a postion is to (re-)translate, |
541 | the UTF8 we have in bufefr and then ask layer below |
542 | */ |
543 | PerlIO_flush(f); |
544 | if (b->buf && b->ptr > b->buf) { |
545 | Perl_croak(aTHX_ "Cannot tell at partial character"); |
546 | } |
547 | return PerlIO_tell(PerlIONext(f)); |
548 | } |
549 | |
550 | PerlIO * |
551 | PerlIOEncode_dup(pTHX_ PerlIO * f, PerlIO * o, |
552 | CLONE_PARAMS * params, int flags) |
553 | { |
554 | if ((f = PerlIOBase_dup(aTHX_ f, o, params, flags))) { |
555 | PerlIOEncode *fe = PerlIOSelf(f, PerlIOEncode); |
556 | PerlIOEncode *oe = PerlIOSelf(o, PerlIOEncode); |
557 | if (oe->enc) { |
558 | fe->enc = PerlIO_sv_dup(aTHX_ oe->enc, params); |
559 | } |
560 | } |
561 | return f; |
562 | } |
563 | |
c00aecee |
564 | SSize_t |
565 | PerlIOEncode_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count) |
566 | { |
567 | PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode); |
568 | if (e->flags & NEEDS_LINES) { |
569 | SSize_t done = 0; |
570 | const char *ptr = (const char *) vbuf; |
571 | const char *end = ptr+count; |
572 | while (ptr < end) { |
573 | const char *nl = ptr; |
574 | while (nl < end && *nl++ != '\n') /* empty body */; |
575 | done = PerlIOBuf_write(aTHX_ f, ptr, nl-ptr); |
576 | if (done != nl-ptr) { |
577 | if (done > 0) { |
578 | ptr += done; |
579 | } |
580 | break; |
581 | } |
582 | ptr += done; |
583 | if (ptr[-1] == '\n') { |
584 | if (PerlIOEncode_flush(aTHX_ f) != 0) { |
585 | break; |
586 | } |
587 | } |
588 | } |
589 | return (SSize_t) (ptr - (const char *) vbuf); |
590 | } |
591 | else { |
592 | return PerlIOBuf_write(aTHX_ f, vbuf, count); |
593 | } |
594 | } |
595 | |
59035dcc |
596 | PerlIO_funcs PerlIO_encode = { |
2dc2558e |
597 | sizeof(PerlIO_funcs), |
59035dcc |
598 | "encoding", |
599 | sizeof(PerlIOEncode), |
600 | PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT, |
601 | PerlIOEncode_pushed, |
602 | PerlIOEncode_popped, |
603 | PerlIOBuf_open, |
86e05cf2 |
604 | NULL, /* binmode - always pop */ |
59035dcc |
605 | PerlIOEncode_getarg, |
606 | PerlIOBase_fileno, |
607 | PerlIOEncode_dup, |
608 | PerlIOBuf_read, |
609 | PerlIOBuf_unread, |
c00aecee |
610 | PerlIOEncode_write, |
59035dcc |
611 | PerlIOBuf_seek, |
612 | PerlIOEncode_tell, |
613 | PerlIOEncode_close, |
614 | PerlIOEncode_flush, |
615 | PerlIOEncode_fill, |
616 | PerlIOBase_eof, |
617 | PerlIOBase_error, |
618 | PerlIOBase_clearerr, |
619 | PerlIOBase_setlinebuf, |
620 | PerlIOEncode_get_base, |
621 | PerlIOBuf_bufsiz, |
622 | PerlIOBuf_get_ptr, |
623 | PerlIOBuf_get_cnt, |
624 | PerlIOBuf_set_ptrcnt, |
625 | }; |
626 | #endif /* encode layer */ |
627 | |
628 | MODULE = PerlIO::encoding PACKAGE = PerlIO::encoding |
629 | |
630 | PROTOTYPES: ENABLE |
631 | |
632 | BOOT: |
633 | { |
1982da40 |
634 | SV *chk = get_sv("PerlIO::encoding::fallback", GV_ADD|GV_ADDMULTI); |
54871a3c |
635 | /* |
636 | * we now "use Encode ()" here instead of |
637 | * PerlIO/encoding.pm. This avoids SEGV when ":encoding()" |
638 | * is invoked without prior "use Encode". -- dankogai |
639 | */ |
24f59afc |
640 | PUSHSTACKi(PERLSI_MAGIC); |
641 | SPAGAIN; |
dc54c799 |
642 | if (!get_cv(OUR_DEFAULT_FB, 0)) { |
9b683d95 |
643 | #if 0 |
644 | /* This would just be an irritant now loading works */ |
54871a3c |
645 | Perl_warner(aTHX_ packWARN(WARN_IO), ":encoding without 'use Encode'"); |
9b683d95 |
646 | #endif |
54871a3c |
647 | ENTER; |
9b683d95 |
648 | /* Encode needs a lot of stack - it is likely to move ... */ |
649 | PUTBACK; |
54871a3c |
650 | /* The SV is magically freed by load_module */ |
651 | load_module(PERL_LOADMOD_NOIMPORT, newSVpvn("Encode", 6), Nullsv, Nullsv); |
9b683d95 |
652 | SPAGAIN; |
54871a3c |
653 | LEAVE; |
654 | } |
655 | PUSHMARK(sp); |
656 | PUTBACK; |
657 | if (call_pv(OUR_DEFAULT_FB, G_SCALAR) != 1) { |
658 | /* should never happen */ |
659 | Perl_die(aTHX_ "%s did not return a value",OUR_DEFAULT_FB); |
660 | } |
661 | SPAGAIN; |
662 | sv_setsv(chk, POPs); |
663 | PUTBACK; |
dc54c799 |
664 | #ifdef PERLIO_LAYERS |
54871a3c |
665 | PerlIO_define_layer(aTHX_ &PerlIO_encode); |
59035dcc |
666 | #endif |
24f59afc |
667 | POPSTACK; |
59035dcc |
668 | } |