| 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; |
| 36 | CV *ERROR; |
| 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); |
| 129 | s->obj = arg; |
| 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)) |
| 138 | s->obj = SvREFCNT_inc(result); |
| 139 | else if (SvIV(result) != 0) |
| 140 | return SvIV(result); |
| 141 | } |
| 142 | if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1) |
| 143 | PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS; |
| 144 | else |
| 145 | PerlIOBase(f)->flags |= PERLIO_F_FASTGETS; |
| 146 | } |
| 147 | else |
| 148 | { |
| 149 | Perl_warn(aTHX_ "Cannot find package '%.*s'",(int) pkglen,pkg); |
| 150 | code = -1; |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | return code; |
| 155 | } |
| 156 | |
| 157 | PerlIO * |
| 158 | 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) |
| 159 | { |
| 160 | if (!f) |
| 161 | { |
| 162 | f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg); |
| 163 | } |
| 164 | else |
| 165 | { |
| 166 | if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg)) |
| 167 | return NULL; |
| 168 | } |
| 169 | if (f) |
| 170 | { |
| 171 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 172 | SV *result = Nullsv; |
| 173 | if (fd >= 0) |
| 174 | { |
| 175 | SV *fdsv = sv_2mortal(newSViv(fd)); |
| 176 | result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv); |
| 177 | } |
| 178 | else if (narg > 0) |
| 179 | { |
| 180 | if (*mode == '#') |
| 181 | { |
| 182 | SV *imodesv = sv_2mortal(newSViv(imode)); |
| 183 | SV *permsv = sv_2mortal(newSViv(perm)); |
| 184 | result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv); |
| 185 | } |
| 186 | else |
| 187 | { |
| 188 | result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv); |
| 189 | } |
| 190 | } |
| 191 | if (result) |
| 192 | { |
| 193 | if (sv_isobject(result)) |
| 194 | s->obj = SvREFCNT_inc(result); |
| 195 | else if (!SvTRUE(result)) |
| 196 | { |
| 197 | return NULL; |
| 198 | } |
| 199 | } |
| 200 | else |
| 201 | return NULL; |
| 202 | } |
| 203 | return f; |
| 204 | } |
| 205 | |
| 206 | IV |
| 207 | PerlIOVia_popped(PerlIO *f) |
| 208 | { |
| 209 | dTHX; |
| 210 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 211 | PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv); |
| 212 | if (s->var) |
| 213 | { |
| 214 | SvREFCNT_dec(s->var); |
| 215 | s->var = Nullsv; |
| 216 | } |
| 217 | |
| 218 | if (s->io) |
| 219 | { |
| 220 | IoIFP(s->io) = NULL; |
| 221 | IoOFP(s->io) = NULL; |
| 222 | } |
| 223 | if (s->fh) |
| 224 | { |
| 225 | SvREFCNT_dec(s->fh); |
| 226 | s->fh = Nullsv; |
| 227 | s->io = NULL; |
| 228 | } |
| 229 | if (s->obj) |
| 230 | { |
| 231 | SvREFCNT_dec(s->obj); |
| 232 | s->obj = Nullsv; |
| 233 | } |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | IV |
| 238 | PerlIOVia_close(PerlIO *f) |
| 239 | { |
| 240 | dTHX; |
| 241 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 242 | IV code = PerlIOBase_close(f); |
| 243 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv); |
| 244 | if (result && SvIV(result) != 0) |
| 245 | code = SvIV(result); |
| 246 | PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF); |
| 247 | return code; |
| 248 | } |
| 249 | |
| 250 | IV |
| 251 | PerlIOVia_fileno(PerlIO *f) |
| 252 | { |
| 253 | dTHX; |
| 254 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 255 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv); |
| 256 | return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f)); |
| 257 | } |
| 258 | |
| 259 | IV |
| 260 | PerlIOVia_seek(PerlIO *f, Off_t offset, int whence) |
| 261 | { |
| 262 | dTHX; |
| 263 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 264 | SV *offsv = sv_2mortal(newSViv(offset)); |
| 265 | SV *whsv = sv_2mortal(newSViv(offset)); |
| 266 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv); |
| 267 | return (result) ? SvIV(result) : -1; |
| 268 | } |
| 269 | |
| 270 | Off_t |
| 271 | PerlIOVia_tell(PerlIO *f) |
| 272 | { |
| 273 | dTHX; |
| 274 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 275 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv); |
| 276 | return (result) ? (Off_t) SvIV(result) : s->posn; |
| 277 | } |
| 278 | |
| 279 | SSize_t |
| 280 | PerlIOVia_unread(PerlIO *f, const void *vbuf, Size_t count) |
| 281 | { |
| 282 | dTHX; |
| 283 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 284 | SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count)); |
| 285 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv); |
| 286 | if (result) |
| 287 | return (SSize_t) SvIV(result); |
| 288 | else |
| 289 | { |
| 290 | return PerlIOBase_unread(f,vbuf,count); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | SSize_t |
| 295 | PerlIOVia_read(PerlIO *f, void *vbuf, Size_t count) |
| 296 | { |
| 297 | SSize_t rd = 0; |
| 298 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
| 299 | { |
| 300 | if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) |
| 301 | { |
| 302 | rd = PerlIOBase_read(f,vbuf,count); |
| 303 | } |
| 304 | else |
| 305 | { |
| 306 | dTHX; |
| 307 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 308 | SV *buf = sv_2mortal(newSV(count)); |
| 309 | SV *n = sv_2mortal(newSViv(count)); |
| 310 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv); |
| 311 | if (result) |
| 312 | { |
| 313 | rd = (SSize_t) SvIV(result); |
| 314 | Move(SvPVX(buf),vbuf,rd,char); |
| 315 | return rd; |
| 316 | } |
| 317 | } |
| 318 | } |
| 319 | return rd; |
| 320 | } |
| 321 | |
| 322 | SSize_t |
| 323 | PerlIOVia_write(PerlIO *f, const void *vbuf, Size_t count) |
| 324 | { |
| 325 | if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) |
| 326 | { |
| 327 | dTHX; |
| 328 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 329 | SV *buf = newSVpvn((char *)vbuf,count); |
| 330 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv); |
| 331 | SvREFCNT_dec(buf); |
| 332 | if (result) |
| 333 | return (SSize_t) SvIV(result); |
| 334 | return -1; |
| 335 | } |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | IV |
| 340 | PerlIOVia_fill(PerlIO *f) |
| 341 | { |
| 342 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
| 343 | { |
| 344 | dTHX; |
| 345 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 346 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv); |
| 347 | if (s->var) |
| 348 | { |
| 349 | SvREFCNT_dec(s->var); |
| 350 | s->var = Nullsv; |
| 351 | } |
| 352 | if (result && SvOK(result)) |
| 353 | { |
| 354 | STRLEN len = 0; |
| 355 | char *p = SvPV(result,len); |
| 356 | s->var = newSVpvn(p,len); |
| 357 | s->cnt = SvCUR(s->var); |
| 358 | return 0; |
| 359 | } |
| 360 | else |
| 361 | PerlIOBase(f)->flags |= PERLIO_F_EOF; |
| 362 | } |
| 363 | return -1; |
| 364 | } |
| 365 | |
| 366 | IV |
| 367 | PerlIOVia_flush(PerlIO *f) |
| 368 | { |
| 369 | dTHX; |
| 370 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 371 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv); |
| 372 | if (s->var && s->cnt > 0) |
| 373 | { |
| 374 | SvREFCNT_dec(s->var); |
| 375 | s->var = Nullsv; |
| 376 | } |
| 377 | return (result) ? SvIV(result) : 0; |
| 378 | } |
| 379 | |
| 380 | STDCHAR * |
| 381 | PerlIOVia_get_base(PerlIO *f) |
| 382 | { |
| 383 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
| 384 | { |
| 385 | dTHX; |
| 386 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 387 | if (s->var) |
| 388 | { |
| 389 | return (STDCHAR *)SvPVX(s->var); |
| 390 | } |
| 391 | } |
| 392 | return (STDCHAR *) Nullch; |
| 393 | } |
| 394 | |
| 395 | STDCHAR * |
| 396 | PerlIOVia_get_ptr(PerlIO *f) |
| 397 | { |
| 398 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
| 399 | { |
| 400 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 401 | if (s->var) |
| 402 | { |
| 403 | dTHX; |
| 404 | STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt); |
| 405 | return p; |
| 406 | } |
| 407 | } |
| 408 | return (STDCHAR *) Nullch; |
| 409 | } |
| 410 | |
| 411 | SSize_t |
| 412 | PerlIOVia_get_cnt(PerlIO *f) |
| 413 | { |
| 414 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
| 415 | { |
| 416 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 417 | if (s->var) |
| 418 | { |
| 419 | return s->cnt; |
| 420 | } |
| 421 | } |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | Size_t |
| 426 | PerlIOVia_bufsiz(PerlIO *f) |
| 427 | { |
| 428 | if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) |
| 429 | { |
| 430 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 431 | if (s->var) |
| 432 | return SvCUR(s->var); |
| 433 | } |
| 434 | return 0; |
| 435 | } |
| 436 | |
| 437 | void |
| 438 | PerlIOVia_set_ptrcnt(PerlIO *f, STDCHAR *ptr, SSize_t cnt) |
| 439 | { |
| 440 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 441 | s->cnt = cnt; |
| 442 | } |
| 443 | |
| 444 | void |
| 445 | PerlIOVia_setlinebuf(PerlIO *f) |
| 446 | { |
| 447 | dTHX; |
| 448 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 449 | PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv); |
| 450 | PerlIOBase_setlinebuf(f); |
| 451 | } |
| 452 | |
| 453 | void |
| 454 | PerlIOVia_clearerr(PerlIO *f) |
| 455 | { |
| 456 | dTHX; |
| 457 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 458 | PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv); |
| 459 | PerlIOBase_clearerr(f); |
| 460 | } |
| 461 | |
| 462 | IV |
| 463 | PerlIOVia_error(PerlIO *f) |
| 464 | { |
| 465 | dTHX; |
| 466 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 467 | SV *result = PerlIOVia_method(aTHX_ f,MYMethod(ERROR),G_SCALAR,Nullsv); |
| 468 | return (result) ? SvIV(result) : PerlIOBase_error(f); |
| 469 | } |
| 470 | |
| 471 | SV * |
| 472 | PerlIOVia_getarg(PerlIO *f) |
| 473 | { |
| 474 | dTHX; |
| 475 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 476 | return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv); |
| 477 | } |
| 478 | |
| 479 | IV |
| 480 | PerlIOVia_eof(PerlIO *f) |
| 481 | { |
| 482 | dTHX; |
| 483 | PerlIOVia *s = PerlIOSelf(f,PerlIOVia); |
| 484 | SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv); |
| 485 | return (result) ? SvIV(result) : PerlIOBase_eof(f); |
| 486 | } |
| 487 | |
| 488 | PerlIO_funcs PerlIO_object = { |
| 489 | "Via", |
| 490 | sizeof(PerlIOVia), |
| 491 | PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT, |
| 492 | PerlIOVia_pushed, |
| 493 | PerlIOVia_popped, |
| 494 | NULL, /* PerlIOVia_open, */ |
| 495 | PerlIOVia_getarg, |
| 496 | PerlIOVia_fileno, |
| 497 | PerlIOVia_read, |
| 498 | PerlIOVia_unread, |
| 499 | PerlIOVia_write, |
| 500 | PerlIOVia_seek, |
| 501 | PerlIOVia_tell, |
| 502 | PerlIOVia_close, |
| 503 | PerlIOVia_flush, |
| 504 | PerlIOVia_fill, |
| 505 | PerlIOVia_eof, |
| 506 | PerlIOVia_error, |
| 507 | PerlIOVia_clearerr, |
| 508 | PerlIOVia_setlinebuf, |
| 509 | PerlIOVia_get_base, |
| 510 | PerlIOVia_bufsiz, |
| 511 | PerlIOVia_get_ptr, |
| 512 | PerlIOVia_get_cnt, |
| 513 | PerlIOVia_set_ptrcnt, |
| 514 | }; |
| 515 | |
| 516 | |
| 517 | #endif /* Layers available */ |
| 518 | |
| 519 | MODULE = PerlIO::Via PACKAGE = PerlIO::Via |
| 520 | PROTOTYPES: ENABLE; |
| 521 | |
| 522 | BOOT: |
| 523 | { |
| 524 | #ifdef PERLIO_LAYERS |
| 525 | PerlIO_define_layer(aTHX_ &PerlIO_object); |
| 526 | #endif |
| 527 | } |
| 528 | |