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