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1 | #define PERL_NO_GET_CONTEXT |
2 | #include "EXTERN.h" |
3 | #include "perl.h" |
4 | #include "XSUB.h" |
5 | #ifdef PERLIO_LAYERS |
6 | |
7 | #include "perliol.h" |
8 | |
9 | typedef struct |
10 | { |
11 | struct _PerlIO base; /* Base "class" info */ |
12 | HV * stash; |
13 | SV * obj; |
14 | SV * var; |
15 | SSize_t cnt; |
16 | Off_t posn; |
17 | IO * io; |
18 | SV * fh; |
19 | CV *PUSHED; |
20 | CV *POPPED; |
21 | CV *OPEN; |
22 | CV *FDOPEN; |
23 | CV *SYSOPEN; |
24 | CV *GETARG; |
25 | CV *FILENO; |
26 | CV *READ; |
27 | CV *WRITE; |
28 | CV *FILL; |
29 | CV *CLOSE; |
30 | CV *SEEK; |
31 | CV *TELL; |
32 | CV *UNREAD; |
33 | CV *FLUSH; |
34 | CV *SETLINEBUF; |
35 | CV *CLEARERR; |
c7997937 |
36 | CV *mERROR; |
e7a1fdd7 |
37 | CV *mEOF; |
38 | } PerlIOVia; |
39 | |
40 | #define MYMethod(x) #x,&s->x |
41 | |
42 | CV * |
43 | PerlIOVia_fetchmethod(pTHX_ PerlIOVia *s,char *method,CV **save) |
44 | { |
45 | GV *gv = gv_fetchmeth(s->stash,method,strlen(method),0); |
46 | #if 0 |
47 | Perl_warn(aTHX_ "Lookup %s::%s => %p",HvNAME(s->stash),method,gv); |
48 | #endif |
49 | if (gv) |
50 | { |
51 | return *save = GvCV(gv); |
52 | } |
53 | else |
54 | { |
55 | return *save = (CV *) -1; |
56 | } |
57 | |
58 | } |
59 | |
60 | SV * |
61 | PerlIOVia_method(pTHX_ PerlIO *f,char *method,CV **save,int flags,...) |
62 | { |
63 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
64 | CV *cv = (*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s,method,save); |
65 | SV *result = Nullsv; |
66 | va_list ap; |
67 | va_start(ap,flags); |
68 | if (cv != (CV *)-1) |
69 | { |
70 | IV count; |
71 | dSP; |
72 | SV *arg; |
73 | int i = 0; |
74 | ENTER; |
75 | PUSHMARK(sp); |
76 | XPUSHs(s->obj); |
77 | while ((arg = va_arg(ap,SV *))) |
78 | { |
79 | XPUSHs(arg); |
80 | } |
81 | if (*PerlIONext(f)) |
82 | { |
83 | if (!s->fh) |
84 | { |
85 | GV *gv = newGVgen(HvNAME(s->stash)); |
86 | GvIOp(gv) = newIO(); |
87 | s->fh = newRV_noinc((SV *)gv); |
88 | s->io = GvIOp(gv); |
89 | } |
90 | IoIFP(s->io) = PerlIONext(f); |
91 | IoOFP(s->io) = PerlIONext(f); |
92 | XPUSHs(s->fh); |
93 | } |
94 | PUTBACK; |
95 | count = call_sv((SV *)cv,flags); |
96 | if (count) |
97 | { |
98 | SPAGAIN; |
99 | result = POPs; |
100 | PUTBACK; |
101 | } |
102 | else |
103 | { |
104 | result = &PL_sv_undef; |
105 | } |
106 | LEAVE; |
107 | } |
108 | va_end(ap); |
109 | return result; |
110 | } |
111 | |
112 | IV |
113 | PerlIOVia_pushed(PerlIO *f, const char *mode, SV *arg) |
114 | { |
115 | IV code = PerlIOBase_pushed(f,mode,Nullsv); |
116 | if (code == 0) |
117 | { |
118 | dTHX; |
119 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
120 | if (!arg) |
121 | { |
122 | Perl_warn(aTHX_ "No package specified"); |
123 | code = -1; |
124 | } |
125 | else |
126 | { |
127 | STRLEN pkglen = 0; |
128 | char *pkg = SvPV(arg,pkglen); |
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129 | s->obj = SvREFCNT_inc(arg); |
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130 | s->stash = gv_stashpvn(pkg, pkglen, FALSE); |
131 | if (s->stash) |
132 | { |
133 | SV *modesv = (mode) ? sv_2mortal(newSVpvn(mode,strlen(mode))) : Nullsv; |
134 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(PUSHED),G_SCALAR,modesv,Nullsv); |
135 | if (result) |
136 | { |
137 | if (sv_isobject(result)) |
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138 | { |
139 | s->obj = SvREFCNT_inc(result); |
140 | SvREFCNT_dec(arg); |
141 | } |
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142 | else if (SvIV(result) != 0) |
143 | return SvIV(result); |
144 | } |
145 | if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1) |
146 | PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS; |
147 | else |
148 | PerlIOBase(f)->flags |= PERLIO_F_FASTGETS; |
149 | } |
150 | else |
151 | { |
152 | Perl_warn(aTHX_ "Cannot find package '%.*s'",(int) pkglen,pkg); |
267cbce7 |
153 | #ifdef ENOSYS |
154 | errno = ENOSYS; |
155 | #else |
156 | #ifdef ENOENT |
157 | errno = ENOENT; |
158 | #endif |
159 | #endif |
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160 | code = -1; |
161 | } |
162 | } |
163 | } |
164 | return code; |
165 | } |
166 | |
167 | PerlIO * |
168 | PerlIOVia_open(pTHX_ PerlIO_funcs *self, AV *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args) |
169 | { |
170 | if (!f) |
171 | { |
172 | f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg); |
173 | } |
174 | else |
175 | { |
176 | if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg)) |
177 | return NULL; |
178 | } |
179 | if (f) |
180 | { |
181 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
182 | SV *result = Nullsv; |
183 | if (fd >= 0) |
184 | { |
185 | SV *fdsv = sv_2mortal(newSViv(fd)); |
186 | result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv); |
187 | } |
188 | else if (narg > 0) |
189 | { |
190 | if (*mode == '#') |
191 | { |
192 | SV *imodesv = sv_2mortal(newSViv(imode)); |
193 | SV *permsv = sv_2mortal(newSViv(perm)); |
194 | result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv); |
195 | } |
196 | else |
197 | { |
198 | result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv); |
199 | } |
200 | } |
201 | if (result) |
202 | { |
203 | if (sv_isobject(result)) |
204 | s->obj = SvREFCNT_inc(result); |
205 | else if (!SvTRUE(result)) |
206 | { |
207 | return NULL; |
208 | } |
209 | } |
210 | else |
211 | return NULL; |
212 | } |
213 | return f; |
214 | } |
215 | |
216 | IV |
217 | PerlIOVia_popped(PerlIO *f) |
218 | { |
219 | dTHX; |
220 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
221 | PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv); |
222 | if (s->var) |
223 | { |
224 | SvREFCNT_dec(s->var); |
225 | s->var = Nullsv; |
226 | } |
227 | |
228 | if (s->io) |
229 | { |
230 | IoIFP(s->io) = NULL; |
231 | IoOFP(s->io) = NULL; |
232 | } |
233 | if (s->fh) |
234 | { |
235 | SvREFCNT_dec(s->fh); |
236 | s->fh = Nullsv; |
237 | s->io = NULL; |
238 | } |
239 | if (s->obj) |
240 | { |
241 | SvREFCNT_dec(s->obj); |
242 | s->obj = Nullsv; |
243 | } |
244 | return 0; |
245 | } |
246 | |
247 | IV |
248 | PerlIOVia_close(PerlIO *f) |
249 | { |
250 | dTHX; |
251 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
252 | IV code = PerlIOBase_close(f); |
253 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv); |
254 | if (result && SvIV(result) != 0) |
255 | code = SvIV(result); |
256 | PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF); |
257 | return code; |
258 | } |
259 | |
260 | IV |
261 | PerlIOVia_fileno(PerlIO *f) |
262 | { |
263 | dTHX; |
264 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
265 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv); |
266 | return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f)); |
267 | } |
268 | |
269 | IV |
270 | PerlIOVia_seek(PerlIO *f, Off_t offset, int whence) |
271 | { |
272 | dTHX; |
273 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
274 | SV *offsv = sv_2mortal(newSViv(offset)); |
275 | SV *whsv = sv_2mortal(newSViv(offset)); |
276 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv); |
277 | return (result) ? SvIV(result) : -1; |
278 | } |
279 | |
280 | Off_t |
281 | PerlIOVia_tell(PerlIO *f) |
282 | { |
283 | dTHX; |
284 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
285 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv); |
286 | return (result) ? (Off_t) SvIV(result) : s->posn; |
287 | } |
288 | |
289 | SSize_t |
290 | PerlIOVia_unread(PerlIO *f, const void *vbuf, Size_t count) |
291 | { |
292 | dTHX; |
293 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
294 | SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count)); |
295 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv); |
296 | if (result) |
297 | return (SSize_t) SvIV(result); |
298 | else |
299 | { |
300 | return PerlIOBase_unread(f,vbuf,count); |
301 | } |
302 | } |
303 | |
304 | SSize_t |
305 | PerlIOVia_read(PerlIO *f, void *vbuf, Size_t count) |
306 | { |
307 | SSize_t rd = 0; |
308 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
309 | { |
310 | if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) |
311 | { |
312 | rd = PerlIOBase_read(f,vbuf,count); |
313 | } |
314 | else |
315 | { |
316 | dTHX; |
317 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
318 | SV *buf = sv_2mortal(newSV(count)); |
319 | SV *n = sv_2mortal(newSViv(count)); |
320 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv); |
321 | if (result) |
322 | { |
323 | rd = (SSize_t) SvIV(result); |
324 | Move(SvPVX(buf),vbuf,rd,char); |
325 | return rd; |
326 | } |
327 | } |
328 | } |
329 | return rd; |
330 | } |
331 | |
332 | SSize_t |
333 | PerlIOVia_write(PerlIO *f, const void *vbuf, Size_t count) |
334 | { |
335 | if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) |
336 | { |
337 | dTHX; |
338 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
339 | SV *buf = newSVpvn((char *)vbuf,count); |
340 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv); |
341 | SvREFCNT_dec(buf); |
342 | if (result) |
343 | return (SSize_t) SvIV(result); |
344 | return -1; |
345 | } |
346 | return 0; |
347 | } |
348 | |
349 | IV |
350 | PerlIOVia_fill(PerlIO *f) |
351 | { |
352 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
353 | { |
354 | dTHX; |
355 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
356 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv); |
357 | if (s->var) |
358 | { |
359 | SvREFCNT_dec(s->var); |
360 | s->var = Nullsv; |
361 | } |
362 | if (result && SvOK(result)) |
363 | { |
364 | STRLEN len = 0; |
365 | char *p = SvPV(result,len); |
366 | s->var = newSVpvn(p,len); |
367 | s->cnt = SvCUR(s->var); |
368 | return 0; |
369 | } |
370 | else |
371 | PerlIOBase(f)->flags |= PERLIO_F_EOF; |
372 | } |
373 | return -1; |
374 | } |
375 | |
376 | IV |
377 | PerlIOVia_flush(PerlIO *f) |
378 | { |
379 | dTHX; |
380 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
381 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv); |
382 | if (s->var && s->cnt > 0) |
383 | { |
384 | SvREFCNT_dec(s->var); |
385 | s->var = Nullsv; |
386 | } |
387 | return (result) ? SvIV(result) : 0; |
388 | } |
389 | |
390 | STDCHAR * |
391 | PerlIOVia_get_base(PerlIO *f) |
392 | { |
393 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
394 | { |
395 | dTHX; |
396 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
397 | if (s->var) |
398 | { |
399 | return (STDCHAR *)SvPVX(s->var); |
400 | } |
401 | } |
402 | return (STDCHAR *) Nullch; |
403 | } |
404 | |
405 | STDCHAR * |
406 | PerlIOVia_get_ptr(PerlIO *f) |
407 | { |
408 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
409 | { |
410 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
411 | if (s->var) |
412 | { |
413 | dTHX; |
414 | STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt); |
415 | return p; |
416 | } |
417 | } |
418 | return (STDCHAR *) Nullch; |
419 | } |
420 | |
421 | SSize_t |
422 | PerlIOVia_get_cnt(PerlIO *f) |
423 | { |
424 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
425 | { |
426 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
427 | if (s->var) |
428 | { |
429 | return s->cnt; |
430 | } |
431 | } |
432 | return 0; |
433 | } |
434 | |
435 | Size_t |
436 | PerlIOVia_bufsiz(PerlIO *f) |
437 | { |
438 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
439 | { |
440 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
441 | if (s->var) |
442 | return SvCUR(s->var); |
443 | } |
444 | return 0; |
445 | } |
446 | |
447 | void |
448 | PerlIOVia_set_ptrcnt(PerlIO *f, STDCHAR *ptr, SSize_t cnt) |
449 | { |
450 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
451 | s->cnt = cnt; |
452 | } |
453 | |
454 | void |
455 | PerlIOVia_setlinebuf(PerlIO *f) |
456 | { |
457 | dTHX; |
458 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
459 | PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv); |
460 | PerlIOBase_setlinebuf(f); |
461 | } |
462 | |
463 | void |
464 | PerlIOVia_clearerr(PerlIO *f) |
465 | { |
466 | dTHX; |
467 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
468 | PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv); |
469 | PerlIOBase_clearerr(f); |
470 | } |
471 | |
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472 | SV * |
473 | PerlIOVia_getarg(PerlIO *f) |
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474 | { |
475 | dTHX; |
476 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
c7997937 |
477 | return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv); |
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478 | } |
479 | |
c7997937 |
480 | IV |
481 | PerlIOVia_error(PerlIO *f) |
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482 | { |
483 | dTHX; |
484 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
c7997937 |
485 | SV *result = PerlIOVia_method(aTHX_ f,"ERROR",&s->mERROR,G_SCALAR,Nullsv); |
486 | return (result) ? SvIV(result) : PerlIOBase_error(f); |
e7a1fdd7 |
487 | } |
488 | |
489 | IV |
490 | PerlIOVia_eof(PerlIO *f) |
491 | { |
492 | dTHX; |
493 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
494 | SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv); |
495 | return (result) ? SvIV(result) : PerlIOBase_eof(f); |
496 | } |
497 | |
498 | PerlIO_funcs PerlIO_object = { |
499 | "Via", |
500 | sizeof(PerlIOVia), |
501 | PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT, |
502 | PerlIOVia_pushed, |
503 | PerlIOVia_popped, |
504 | NULL, /* PerlIOVia_open, */ |
505 | PerlIOVia_getarg, |
506 | PerlIOVia_fileno, |
507 | PerlIOVia_read, |
508 | PerlIOVia_unread, |
509 | PerlIOVia_write, |
510 | PerlIOVia_seek, |
511 | PerlIOVia_tell, |
512 | PerlIOVia_close, |
513 | PerlIOVia_flush, |
514 | PerlIOVia_fill, |
515 | PerlIOVia_eof, |
516 | PerlIOVia_error, |
517 | PerlIOVia_clearerr, |
518 | PerlIOVia_setlinebuf, |
519 | PerlIOVia_get_base, |
520 | PerlIOVia_bufsiz, |
521 | PerlIOVia_get_ptr, |
522 | PerlIOVia_get_cnt, |
523 | PerlIOVia_set_ptrcnt, |
524 | }; |
525 | |
526 | |
527 | #endif /* Layers available */ |
528 | |
529 | MODULE = PerlIO::Via PACKAGE = PerlIO::Via |
530 | PROTOTYPES: ENABLE; |
531 | |
532 | BOOT: |
533 | { |
534 | #ifdef PERLIO_LAYERS |
535 | PerlIO_define_layer(aTHX_ &PerlIO_object); |
536 | #endif |
537 | } |
538 | |