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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; |
e7a1fdd7 |
73 | ENTER; |
74 | PUSHMARK(sp); |
75 | XPUSHs(s->obj); |
76 | while ((arg = va_arg(ap,SV *))) |
77 | { |
78 | XPUSHs(arg); |
79 | } |
80 | if (*PerlIONext(f)) |
81 | { |
82 | if (!s->fh) |
83 | { |
84 | GV *gv = newGVgen(HvNAME(s->stash)); |
85 | GvIOp(gv) = newIO(); |
86 | s->fh = newRV_noinc((SV *)gv); |
87 | s->io = GvIOp(gv); |
88 | } |
89 | IoIFP(s->io) = PerlIONext(f); |
90 | IoOFP(s->io) = PerlIONext(f); |
91 | XPUSHs(s->fh); |
92 | } |
93 | PUTBACK; |
94 | count = call_sv((SV *)cv,flags); |
95 | if (count) |
96 | { |
97 | SPAGAIN; |
98 | result = POPs; |
99 | PUTBACK; |
100 | } |
101 | else |
102 | { |
103 | result = &PL_sv_undef; |
104 | } |
105 | LEAVE; |
106 | } |
107 | va_end(ap); |
108 | return result; |
109 | } |
110 | |
111 | IV |
112 | PerlIOVia_pushed(PerlIO *f, const char *mode, SV *arg) |
113 | { |
114 | IV code = PerlIOBase_pushed(f,mode,Nullsv); |
115 | if (code == 0) |
116 | { |
117 | dTHX; |
118 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
119 | if (!arg) |
120 | { |
121 | Perl_warn(aTHX_ "No package specified"); |
122 | code = -1; |
123 | } |
124 | else |
125 | { |
126 | STRLEN pkglen = 0; |
127 | char *pkg = SvPV(arg,pkglen); |
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128 | s->obj = SvREFCNT_inc(arg); |
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129 | s->stash = gv_stashpvn(pkg, pkglen, FALSE); |
130 | if (s->stash) |
131 | { |
132 | SV *modesv = (mode) ? sv_2mortal(newSVpvn(mode,strlen(mode))) : Nullsv; |
133 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(PUSHED),G_SCALAR,modesv,Nullsv); |
134 | if (result) |
135 | { |
136 | if (sv_isobject(result)) |
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137 | { |
138 | s->obj = SvREFCNT_inc(result); |
139 | SvREFCNT_dec(arg); |
140 | } |
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141 | else if (SvIV(result) != 0) |
142 | return SvIV(result); |
143 | } |
144 | if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1) |
145 | PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS; |
146 | else |
147 | PerlIOBase(f)->flags |= PERLIO_F_FASTGETS; |
148 | } |
149 | else |
150 | { |
151 | Perl_warn(aTHX_ "Cannot find package '%.*s'",(int) pkglen,pkg); |
267cbce7 |
152 | #ifdef ENOSYS |
153 | errno = ENOSYS; |
154 | #else |
155 | #ifdef ENOENT |
156 | errno = ENOENT; |
157 | #endif |
158 | #endif |
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159 | code = -1; |
160 | } |
161 | } |
162 | } |
163 | return code; |
164 | } |
165 | |
166 | PerlIO * |
fcf2db38 |
167 | PerlIOVia_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args) |
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168 | { |
169 | if (!f) |
170 | { |
171 | f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg); |
172 | } |
173 | else |
174 | { |
175 | if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg)) |
176 | return NULL; |
177 | } |
178 | if (f) |
179 | { |
180 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
181 | SV *result = Nullsv; |
182 | if (fd >= 0) |
183 | { |
184 | SV *fdsv = sv_2mortal(newSViv(fd)); |
185 | result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv); |
186 | } |
187 | else if (narg > 0) |
188 | { |
189 | if (*mode == '#') |
190 | { |
191 | SV *imodesv = sv_2mortal(newSViv(imode)); |
192 | SV *permsv = sv_2mortal(newSViv(perm)); |
193 | result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv); |
194 | } |
195 | else |
196 | { |
197 | result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv); |
198 | } |
199 | } |
200 | if (result) |
201 | { |
202 | if (sv_isobject(result)) |
203 | s->obj = SvREFCNT_inc(result); |
204 | else if (!SvTRUE(result)) |
205 | { |
206 | return NULL; |
207 | } |
208 | } |
209 | else |
210 | return NULL; |
211 | } |
212 | return f; |
213 | } |
214 | |
215 | IV |
216 | PerlIOVia_popped(PerlIO *f) |
217 | { |
218 | dTHX; |
219 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
220 | PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv); |
221 | if (s->var) |
222 | { |
223 | SvREFCNT_dec(s->var); |
224 | s->var = Nullsv; |
225 | } |
226 | |
227 | if (s->io) |
228 | { |
229 | IoIFP(s->io) = NULL; |
230 | IoOFP(s->io) = NULL; |
231 | } |
232 | if (s->fh) |
233 | { |
234 | SvREFCNT_dec(s->fh); |
235 | s->fh = Nullsv; |
236 | s->io = NULL; |
237 | } |
238 | if (s->obj) |
239 | { |
240 | SvREFCNT_dec(s->obj); |
241 | s->obj = Nullsv; |
242 | } |
243 | return 0; |
244 | } |
245 | |
246 | IV |
247 | PerlIOVia_close(PerlIO *f) |
248 | { |
249 | dTHX; |
250 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
251 | IV code = PerlIOBase_close(f); |
252 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv); |
253 | if (result && SvIV(result) != 0) |
254 | code = SvIV(result); |
255 | PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF); |
256 | return code; |
257 | } |
258 | |
259 | IV |
260 | PerlIOVia_fileno(PerlIO *f) |
261 | { |
262 | dTHX; |
263 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
264 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv); |
265 | return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f)); |
266 | } |
267 | |
268 | IV |
269 | PerlIOVia_seek(PerlIO *f, Off_t offset, int whence) |
270 | { |
271 | dTHX; |
272 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
273 | SV *offsv = sv_2mortal(newSViv(offset)); |
274 | SV *whsv = sv_2mortal(newSViv(offset)); |
275 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv); |
276 | return (result) ? SvIV(result) : -1; |
277 | } |
278 | |
279 | Off_t |
280 | PerlIOVia_tell(PerlIO *f) |
281 | { |
282 | dTHX; |
283 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
284 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv); |
285 | return (result) ? (Off_t) SvIV(result) : s->posn; |
286 | } |
287 | |
288 | SSize_t |
289 | PerlIOVia_unread(PerlIO *f, const void *vbuf, Size_t count) |
290 | { |
291 | dTHX; |
292 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
293 | SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count)); |
294 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv); |
295 | if (result) |
296 | return (SSize_t) SvIV(result); |
297 | else |
298 | { |
299 | return PerlIOBase_unread(f,vbuf,count); |
300 | } |
301 | } |
302 | |
303 | SSize_t |
304 | PerlIOVia_read(PerlIO *f, void *vbuf, Size_t count) |
305 | { |
306 | SSize_t rd = 0; |
307 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
308 | { |
309 | if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) |
310 | { |
311 | rd = PerlIOBase_read(f,vbuf,count); |
312 | } |
313 | else |
314 | { |
315 | dTHX; |
316 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
317 | SV *buf = sv_2mortal(newSV(count)); |
318 | SV *n = sv_2mortal(newSViv(count)); |
319 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv); |
320 | if (result) |
321 | { |
322 | rd = (SSize_t) SvIV(result); |
323 | Move(SvPVX(buf),vbuf,rd,char); |
324 | return rd; |
325 | } |
326 | } |
327 | } |
328 | return rd; |
329 | } |
330 | |
331 | SSize_t |
332 | PerlIOVia_write(PerlIO *f, const void *vbuf, Size_t count) |
333 | { |
334 | if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) |
335 | { |
336 | dTHX; |
337 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
338 | SV *buf = newSVpvn((char *)vbuf,count); |
339 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv); |
340 | SvREFCNT_dec(buf); |
341 | if (result) |
342 | return (SSize_t) SvIV(result); |
343 | return -1; |
344 | } |
345 | return 0; |
346 | } |
347 | |
348 | IV |
349 | PerlIOVia_fill(PerlIO *f) |
350 | { |
351 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
352 | { |
353 | dTHX; |
354 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
355 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv); |
356 | if (s->var) |
357 | { |
358 | SvREFCNT_dec(s->var); |
359 | s->var = Nullsv; |
360 | } |
361 | if (result && SvOK(result)) |
362 | { |
363 | STRLEN len = 0; |
364 | char *p = SvPV(result,len); |
365 | s->var = newSVpvn(p,len); |
366 | s->cnt = SvCUR(s->var); |
367 | return 0; |
368 | } |
369 | else |
370 | PerlIOBase(f)->flags |= PERLIO_F_EOF; |
371 | } |
372 | return -1; |
373 | } |
374 | |
375 | IV |
376 | PerlIOVia_flush(PerlIO *f) |
377 | { |
378 | dTHX; |
379 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
380 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv); |
381 | if (s->var && s->cnt > 0) |
382 | { |
383 | SvREFCNT_dec(s->var); |
384 | s->var = Nullsv; |
385 | } |
386 | return (result) ? SvIV(result) : 0; |
387 | } |
388 | |
389 | STDCHAR * |
390 | PerlIOVia_get_base(PerlIO *f) |
391 | { |
392 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
393 | { |
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394 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
395 | if (s->var) |
396 | { |
397 | return (STDCHAR *)SvPVX(s->var); |
398 | } |
399 | } |
400 | return (STDCHAR *) Nullch; |
401 | } |
402 | |
403 | STDCHAR * |
404 | PerlIOVia_get_ptr(PerlIO *f) |
405 | { |
406 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
407 | { |
408 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
409 | if (s->var) |
410 | { |
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411 | STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt); |
412 | return p; |
413 | } |
414 | } |
415 | return (STDCHAR *) Nullch; |
416 | } |
417 | |
418 | SSize_t |
419 | PerlIOVia_get_cnt(PerlIO *f) |
420 | { |
421 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
422 | { |
423 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
424 | if (s->var) |
425 | { |
426 | return s->cnt; |
427 | } |
428 | } |
429 | return 0; |
430 | } |
431 | |
432 | Size_t |
433 | PerlIOVia_bufsiz(PerlIO *f) |
434 | { |
435 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
436 | { |
437 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
438 | if (s->var) |
439 | return SvCUR(s->var); |
440 | } |
441 | return 0; |
442 | } |
443 | |
444 | void |
445 | PerlIOVia_set_ptrcnt(PerlIO *f, STDCHAR *ptr, SSize_t cnt) |
446 | { |
447 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
448 | s->cnt = cnt; |
449 | } |
450 | |
451 | void |
452 | PerlIOVia_setlinebuf(PerlIO *f) |
453 | { |
454 | dTHX; |
455 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
456 | PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv); |
457 | PerlIOBase_setlinebuf(f); |
458 | } |
459 | |
460 | void |
461 | PerlIOVia_clearerr(PerlIO *f) |
462 | { |
463 | dTHX; |
464 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
465 | PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv); |
466 | PerlIOBase_clearerr(f); |
467 | } |
468 | |
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469 | SV * |
470 | PerlIOVia_getarg(PerlIO *f) |
e7a1fdd7 |
471 | { |
472 | dTHX; |
473 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
c7997937 |
474 | return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv); |
e7a1fdd7 |
475 | } |
476 | |
c7997937 |
477 | IV |
478 | PerlIOVia_error(PerlIO *f) |
e7a1fdd7 |
479 | { |
480 | dTHX; |
481 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
c7997937 |
482 | SV *result = PerlIOVia_method(aTHX_ f,"ERROR",&s->mERROR,G_SCALAR,Nullsv); |
483 | return (result) ? SvIV(result) : PerlIOBase_error(f); |
e7a1fdd7 |
484 | } |
485 | |
486 | IV |
487 | PerlIOVia_eof(PerlIO *f) |
488 | { |
489 | dTHX; |
490 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
491 | SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv); |
492 | return (result) ? SvIV(result) : PerlIOBase_eof(f); |
493 | } |
494 | |
495 | PerlIO_funcs PerlIO_object = { |
496 | "Via", |
497 | sizeof(PerlIOVia), |
498 | PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT, |
499 | PerlIOVia_pushed, |
500 | PerlIOVia_popped, |
501 | NULL, /* PerlIOVia_open, */ |
502 | PerlIOVia_getarg, |
503 | PerlIOVia_fileno, |
504 | PerlIOVia_read, |
505 | PerlIOVia_unread, |
506 | PerlIOVia_write, |
507 | PerlIOVia_seek, |
508 | PerlIOVia_tell, |
509 | PerlIOVia_close, |
510 | PerlIOVia_flush, |
511 | PerlIOVia_fill, |
512 | PerlIOVia_eof, |
513 | PerlIOVia_error, |
514 | PerlIOVia_clearerr, |
515 | PerlIOVia_setlinebuf, |
516 | PerlIOVia_get_base, |
517 | PerlIOVia_bufsiz, |
518 | PerlIOVia_get_ptr, |
519 | PerlIOVia_get_cnt, |
520 | PerlIOVia_set_ptrcnt, |
521 | }; |
522 | |
523 | |
524 | #endif /* Layers available */ |
525 | |
526 | MODULE = PerlIO::Via PACKAGE = PerlIO::Via |
527 | PROTOTYPES: ENABLE; |
528 | |
529 | BOOT: |
530 | { |
531 | #ifdef PERLIO_LAYERS |
532 | PerlIO_define_layer(aTHX_ &PerlIO_object); |
533 | #endif |
534 | } |
535 | |