Guido van Rossum | 049cd90 | 1996-12-05 23:30:48 +0000 | [diff] [blame] | 1 | /* |
| 2 | |
| 3 | $Id$ |
| 4 | |
| 5 | A simple fast partial StringIO replacement. |
| 6 | |
| 7 | |
| 8 | |
| 9 | Copyright |
| 10 | |
| 11 | Copyright 1996 Digital Creations, L.C., 910 Princess Anne |
| 12 | Street, Suite 300, Fredericksburg, Virginia 22401 U.S.A. All |
| 13 | rights reserved. Copyright in this software is owned by DCLC, |
| 14 | unless otherwise indicated. Permission to use, copy and |
| 15 | distribute this software is hereby granted, provided that the |
| 16 | above copyright notice appear in all copies and that both that |
| 17 | copyright notice and this permission notice appear. Note that |
| 18 | any product, process or technology described in this software |
| 19 | may be the subject of other Intellectual Property rights |
| 20 | reserved by Digital Creations, L.C. and are not licensed |
| 21 | hereunder. |
| 22 | |
| 23 | Trademarks |
| 24 | |
| 25 | Digital Creations & DCLC, are trademarks of Digital Creations, L.C.. |
| 26 | All other trademarks are owned by their respective companies. |
| 27 | |
| 28 | No Warranty |
| 29 | |
| 30 | The software is provided "as is" without warranty of any kind, |
| 31 | either express or implied, including, but not limited to, the |
| 32 | implied warranties of merchantability, fitness for a particular |
| 33 | purpose, or non-infringement. This software could include |
| 34 | technical inaccuracies or typographical errors. Changes are |
| 35 | periodically made to the software; these changes will be |
| 36 | incorporated in new editions of the software. DCLC may make |
| 37 | improvements and/or changes in this software at any time |
| 38 | without notice. |
| 39 | |
| 40 | Limitation Of Liability |
| 41 | |
| 42 | In no event will DCLC be liable for direct, indirect, special, |
| 43 | incidental, economic, cover, or consequential damages arising |
| 44 | out of the use of or inability to use this software even if |
| 45 | advised of the possibility of such damages. Some states do not |
| 46 | allow the exclusion or limitation of implied warranties or |
| 47 | limitation of liability for incidental or consequential |
| 48 | damages, so the above limitation or exclusion may not apply to |
| 49 | you. |
| 50 | |
| 51 | If you have questions regarding this software, |
| 52 | contact: |
| 53 | |
| 54 | Jim Fulton, jim@digicool.com |
| 55 | Digital Creations L.C. |
| 56 | |
| 57 | (540) 371-6909 |
| 58 | |
| 59 | |
| 60 | $Log$ |
| 61 | Revision 2.1 1996/12/05 23:30:40 guido |
| 62 | Jim F's brainchild |
| 63 | |
| 64 | Revision 1.6 1996/10/15 18:42:07 jim |
| 65 | Added lots of casts to make warnings go away. |
| 66 | |
| 67 | Revision 1.5 1996/10/11 21:03:42 jim |
| 68 | *** empty log message *** |
| 69 | |
| 70 | Revision 1.4 1996/10/11 21:02:15 jim |
| 71 | *** empty log message *** |
| 72 | |
| 73 | Revision 1.3 1996/10/07 20:51:38 chris |
| 74 | *** empty log message *** |
| 75 | |
| 76 | Revision 1.2 1996/07/18 13:08:34 jfulton |
| 77 | *** empty log message *** |
| 78 | |
| 79 | Revision 1.1 1996/07/15 17:06:33 jfulton |
| 80 | Initial version. |
| 81 | |
| 82 | |
| 83 | */ |
| 84 | static char cStringIO_module_documentation[] = |
| 85 | "A simple fast partial StringIO replacement.\n" |
| 86 | "\n" |
| 87 | "This module provides a simple useful replacement for\n" |
| 88 | "the StringIO module that is written in C. It does not provide the\n" |
| 89 | "full generality if StringIO, but it provides anough for most\n" |
| 90 | "applications and is especially useful in conjuction with the\n" |
| 91 | "pickle module.\n" |
| 92 | "\n" |
| 93 | "Usage:\n" |
| 94 | "\n" |
| 95 | " from cStringIO import StringIO\n" |
| 96 | "\n" |
| 97 | " an_output_stream=StringIO()\n" |
| 98 | " an_output_stream.write(some_stuff)\n" |
| 99 | " ...\n" |
| 100 | " value=an_output_stream.getvalue() # str(an_output_stream) works too!\n" |
| 101 | "\n" |
| 102 | " an_input_stream=StringIO(a_string)\n" |
| 103 | " spam=an_input_stream.readline()\n" |
| 104 | " spam=an_input_stream.read(5)\n" |
| 105 | " an_input_stream.reset() # OK, start over, note no seek yet\n" |
| 106 | " spam=an_input_stream.read() # and read it all\n" |
| 107 | " \n" |
| 108 | "If someone else wants to provide a more complete implementation,\n" |
| 109 | "go for it. :-) \n" |
| 110 | ; |
| 111 | |
| 112 | #include "Python.h" |
| 113 | #include "import.h" |
| 114 | |
| 115 | static PyObject *ErrorObject; |
| 116 | |
| 117 | #define ASSIGN(V,E) {PyObject *__e; __e=(E); Py_XDECREF(V); (V)=__e;} |
| 118 | #define UNLESS(E) if(!(E)) |
| 119 | #define UNLESS_ASSIGN(V,E) ASSIGN(V,E) UNLESS(V) |
| 120 | #define Py_ASSIGN(P,E) if(!PyObject_AssignExpression(&(P),(E))) return NULL |
| 121 | |
| 122 | /* ----------------------------------------------------- */ |
| 123 | |
| 124 | /* Declarations for objects of type StringO */ |
| 125 | |
| 126 | typedef struct { |
| 127 | PyObject_HEAD |
| 128 | char *buf; |
| 129 | int pos, string_size, buf_size, closed; |
| 130 | } Oobject; |
| 131 | |
| 132 | staticforward PyTypeObject Otype; |
| 133 | |
| 134 | /* ---------------------------------------------------------------- */ |
| 135 | |
| 136 | /* Declarations for objects of type StringI */ |
| 137 | |
| 138 | typedef struct { |
| 139 | PyObject_HEAD |
| 140 | char *buf; |
| 141 | int pos, string_size, closed; |
| 142 | PyObject *pbuf; |
| 143 | } Iobject; |
| 144 | |
| 145 | staticforward PyTypeObject Itype; |
| 146 | |
| 147 | |
| 148 | |
| 149 | /* ---------------------------------------------------------------- */ |
| 150 | |
| 151 | static char O_reset__doc__[] = |
| 152 | "reset() -- Reset the file position to the beginning" |
| 153 | ; |
| 154 | |
| 155 | static PyObject * |
| 156 | O_reset(Oobject *self, PyObject *args) |
| 157 | { |
| 158 | self->pos = 0; |
| 159 | |
| 160 | Py_INCREF(Py_None); |
| 161 | return Py_None; |
| 162 | } |
| 163 | |
| 164 | |
| 165 | static char O_tell__doc__[] = |
| 166 | "tell() -- get the current position."; |
| 167 | |
| 168 | static PyObject * |
| 169 | O_tell(Oobject *self, PyObject *args) |
| 170 | { |
| 171 | return PyInt_FromLong(self->pos); |
| 172 | } |
| 173 | |
| 174 | |
| 175 | static char O_seek__doc__[] = |
| 176 | "seek(position) -- set the current position\n" |
| 177 | "seek(position, mode) -- mode 0: absolute; 1: relative; 2: relative to EOF"; |
| 178 | |
| 179 | static PyObject * |
| 180 | O_seek(Oobject *self, PyObject *args) |
| 181 | { |
| 182 | int position, mode = 0; |
| 183 | |
| 184 | UNLESS(PyArg_ParseTuple(args, "i|i", &position, &mode)) |
| 185 | { |
| 186 | return NULL; |
| 187 | } |
| 188 | |
| 189 | if (mode == 2) |
| 190 | { |
| 191 | position += self->string_size; |
| 192 | } |
| 193 | else if (mode == 1) |
| 194 | { |
| 195 | position += self->pos; |
| 196 | } |
| 197 | |
| 198 | self->pos = (position > self->string_size ? self->string_size : |
| 199 | (position < 0 ? 0 : position)); |
| 200 | |
| 201 | return PyInt_FromLong(self->pos); |
| 202 | } |
| 203 | |
| 204 | static char O_read__doc__[] = |
| 205 | "read([s]) -- Read s characters, or the rest of the string" |
| 206 | ; |
| 207 | |
| 208 | static int |
| 209 | O_cread(Oobject *self, char **output, int n) |
| 210 | { |
| 211 | int l; |
| 212 | |
| 213 | l = self->string_size - self->pos; |
| 214 | if (n < 0 || n > l) |
| 215 | { |
| 216 | n = l; |
| 217 | } |
| 218 | |
| 219 | *output=self->buf + self->pos; |
| 220 | self->pos += n; |
| 221 | return n; |
| 222 | } |
| 223 | |
| 224 | static PyObject * |
| 225 | O_read(Oobject *self, PyObject *args) |
| 226 | { |
| 227 | int n = -1; |
| 228 | char *output; |
| 229 | |
| 230 | UNLESS(PyArg_ParseTuple(args, "|i", &n)) return NULL; |
| 231 | |
| 232 | n=O_cread(self,&output,n); |
| 233 | |
| 234 | return PyString_FromStringAndSize(output, n); |
| 235 | } |
| 236 | |
| 237 | |
| 238 | static char O_readline__doc__[] = |
| 239 | "readline() -- Read one line" |
| 240 | ; |
| 241 | |
| 242 | static int |
| 243 | O_creadline(Oobject *self, char **output) |
| 244 | { |
| 245 | char *n, *s; |
| 246 | int l; |
| 247 | |
| 248 | for (n = self->buf + self->pos, s = self->buf + self->string_size; |
| 249 | n < s && *n != '\n'; n++); |
| 250 | if (n < s) n++; |
| 251 | |
| 252 | *output=self->buf + self->pos; |
| 253 | l = n - self->buf - self->pos; |
| 254 | self->pos += l; |
| 255 | return l; |
| 256 | } |
| 257 | |
| 258 | static PyObject * |
| 259 | O_readline(Oobject *self, PyObject *args) |
| 260 | { |
| 261 | int n; |
| 262 | char *output; |
| 263 | |
| 264 | n=O_creadline(self,&output); |
| 265 | return PyString_FromStringAndSize(output, n); |
| 266 | } |
| 267 | |
| 268 | static char O_write__doc__[] = |
| 269 | "write(s) -- Write a string to the file" |
| 270 | "\n\nNote (hack:) writing None resets the buffer" |
| 271 | ; |
| 272 | |
| 273 | |
| 274 | static int |
| 275 | O_cwrite(Oobject *self, char *c, int l) |
| 276 | { |
| 277 | int newl; |
| 278 | newl=self->pos+l; |
| 279 | if(newl > self->buf_size) |
| 280 | { |
| 281 | self->buf_size*=2; |
| 282 | if(self->buf_size < newl) self->buf_size=newl; |
| 283 | UNLESS(self->buf=(char*)realloc(self->buf, self->buf_size*sizeof(char))) |
| 284 | { |
| 285 | PyErr_SetString(PyExc_MemoryError,"out of memory"); |
| 286 | self->buf_size=self->pos=0; |
| 287 | return -1; |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | memcpy(self->buf+self->pos,c,l); |
| 292 | |
| 293 | self->pos += l; |
| 294 | |
| 295 | if (self->string_size < self->pos) |
| 296 | { |
| 297 | self->string_size = self->pos; |
| 298 | } |
| 299 | |
| 300 | return l; |
| 301 | } |
| 302 | |
| 303 | static PyObject * |
| 304 | O_write(Oobject *self, PyObject *args) |
| 305 | { |
| 306 | PyObject *s; |
| 307 | char *c; |
| 308 | int l; |
| 309 | |
| 310 | UNLESS(PyArg_Parse(args, "O", &s)) return NULL; |
| 311 | if(s!=Py_None) |
| 312 | { |
| 313 | UNLESS(-1 != (l=PyString_Size(s))) return NULL; |
| 314 | UNLESS(c=PyString_AsString(s)) return NULL; |
| 315 | UNLESS(-1 != O_cwrite(self,c,l)) return NULL; |
| 316 | } |
| 317 | else |
| 318 | { |
| 319 | self->pos=0; |
| 320 | self->string_size = 0; |
| 321 | } |
| 322 | |
| 323 | Py_INCREF(self); |
| 324 | return (PyObject *)self; |
| 325 | } |
| 326 | |
| 327 | static PyObject * |
| 328 | O_repr(self) |
| 329 | Oobject *self; |
| 330 | { |
| 331 | return PyString_FromStringAndSize(self->buf,self->string_size); |
| 332 | } |
| 333 | |
| 334 | static PyObject * |
| 335 | O_getval(self,args) |
| 336 | Oobject *self; |
| 337 | PyObject *args; |
| 338 | { |
| 339 | return PyString_FromStringAndSize(self->buf,self->pos); |
| 340 | } |
| 341 | |
| 342 | static char O_truncate__doc__[] = |
| 343 | "truncate(): truncate the file at the current position."; |
| 344 | |
| 345 | static PyObject * |
| 346 | O_truncate(self, args) |
| 347 | Oobject *self; |
| 348 | PyObject *args; |
| 349 | { |
| 350 | self->string_size = self->pos; |
| 351 | Py_INCREF(Py_None); |
| 352 | return Py_None; |
| 353 | } |
| 354 | |
| 355 | static char O_isatty__doc__[] = "isatty(): always returns 0"; |
| 356 | |
| 357 | static PyObject * |
| 358 | O_isatty(self, args) |
| 359 | Oobject *self; |
| 360 | PyObject *args; |
| 361 | { |
| 362 | return PyInt_FromLong(0); |
| 363 | } |
| 364 | |
| 365 | static char O_close__doc__[] = "close(): explicitly release resources held."; |
| 366 | |
| 367 | static PyObject * |
| 368 | O_close(self, args) |
| 369 | Oobject *self; |
| 370 | PyObject *args; |
| 371 | { |
| 372 | free(self->buf); |
| 373 | |
| 374 | self->pos = self->string_size = self->buf_size = 0; |
| 375 | self->closed = 1; |
| 376 | |
| 377 | Py_INCREF(Py_None); |
| 378 | return Py_None; |
| 379 | } |
| 380 | |
| 381 | static char O_flush__doc__[] = "flush(): does nothing."; |
| 382 | |
| 383 | static PyObject * |
| 384 | O_flush(self, args) |
| 385 | Oobject *self; |
| 386 | PyObject *args; |
| 387 | { |
| 388 | Py_INCREF(Py_None); |
| 389 | return Py_None; |
| 390 | } |
| 391 | |
| 392 | |
| 393 | static char O_writelines__doc__[] = "blah"; |
| 394 | static PyObject * |
| 395 | O_writelines(self, args) |
| 396 | Oobject *self; |
| 397 | PyObject *args; |
| 398 | { |
| 399 | PyObject *string_module = 0; |
| 400 | static PyObject *string_joinfields = 0; |
| 401 | |
| 402 | UNLESS(PyArg_Parse(args, "O", args)) |
| 403 | { |
| 404 | return NULL; |
| 405 | } |
| 406 | |
| 407 | if (!string_joinfields) |
| 408 | { |
| 409 | UNLESS(string_module = PyImport_ImportModule("string")) |
| 410 | { |
| 411 | return NULL; |
| 412 | } |
| 413 | |
| 414 | UNLESS(string_joinfields= |
| 415 | PyObject_GetAttrString(string_module, "joinfields")) |
| 416 | { |
| 417 | return NULL; |
| 418 | } |
| 419 | |
| 420 | Py_DECREF(string_module); |
| 421 | } |
| 422 | |
| 423 | if (PyObject_Length(args) == -1) |
| 424 | { |
| 425 | return NULL; |
| 426 | } |
| 427 | |
| 428 | return O_write(self, |
| 429 | PyObject_CallFunction(string_joinfields, "Os", args, "")); |
| 430 | } |
| 431 | |
| 432 | static struct PyMethodDef O_methods[] = { |
| 433 | {"read", (PyCFunction)O_read, 1, O_read__doc__}, |
| 434 | {"readline", (PyCFunction)O_readline, 0, O_readline__doc__}, |
| 435 | {"write", (PyCFunction)O_write, 0, O_write__doc__}, |
| 436 | {"reset", (PyCFunction)O_reset, 0, O_reset__doc__}, |
| 437 | {"seek", (PyCFunction)O_seek, 1, O_seek__doc__}, |
| 438 | {"tell", (PyCFunction)O_tell, 0, O_tell__doc__}, |
| 439 | {"getvalue", (PyCFunction)O_getval, 0, "getvalue() -- Get the string value"}, |
| 440 | {"truncate", (PyCFunction)O_truncate, 0, O_truncate__doc__}, |
| 441 | {"isatty", (PyCFunction)O_isatty, 0, O_isatty__doc__}, |
| 442 | {"close", (PyCFunction)O_close, 0, O_close__doc__}, |
| 443 | {"flush", (PyCFunction)O_flush, 0, O_flush__doc__}, |
| 444 | {"writelines", (PyCFunction)O_writelines, 0, O_writelines__doc__}, |
| 445 | {NULL, NULL} /* sentinel */ |
| 446 | }; |
| 447 | |
| 448 | /* ---------- */ |
| 449 | |
| 450 | |
| 451 | static Oobject * |
| 452 | newOobject(int size) |
| 453 | { |
| 454 | Oobject *self; |
| 455 | |
| 456 | self = PyObject_NEW(Oobject, &Otype); |
| 457 | if (self == NULL) |
| 458 | return NULL; |
| 459 | self->pos=0; |
| 460 | self->closed = 0; |
| 461 | self->string_size = 0; |
| 462 | |
| 463 | UNLESS(self->buf=malloc(size*sizeof(char))) |
| 464 | { |
| 465 | PyErr_SetString(PyExc_MemoryError,"out of memory"); |
| 466 | self->buf_size = 0; |
| 467 | return NULL; |
| 468 | } |
| 469 | |
| 470 | self->buf_size=size; |
| 471 | return self; |
| 472 | } |
| 473 | |
| 474 | |
| 475 | static void |
| 476 | O_dealloc(self) |
| 477 | Oobject *self; |
| 478 | { |
| 479 | free(self->buf); |
| 480 | PyMem_DEL(self); |
| 481 | } |
| 482 | |
| 483 | static PyObject * |
| 484 | O_getattr(self, name) |
| 485 | Oobject *self; |
| 486 | char *name; |
| 487 | { |
| 488 | return Py_FindMethod(O_methods, (PyObject *)self, name); |
| 489 | } |
| 490 | |
| 491 | static char Otype__doc__[] = |
| 492 | "Simple type for output to strings." |
| 493 | ; |
| 494 | |
| 495 | static PyTypeObject Otype = { |
| 496 | PyObject_HEAD_INIT(&PyType_Type) |
| 497 | 0, /*ob_size*/ |
| 498 | "StringO", /*tp_name*/ |
| 499 | sizeof(Oobject), /*tp_basicsize*/ |
| 500 | 0, /*tp_itemsize*/ |
| 501 | /* methods */ |
| 502 | (destructor)O_dealloc, /*tp_dealloc*/ |
| 503 | (printfunc)0, /*tp_print*/ |
| 504 | (getattrfunc)O_getattr, /*tp_getattr*/ |
| 505 | (setattrfunc)0, /*tp_setattr*/ |
| 506 | (cmpfunc)0, /*tp_compare*/ |
| 507 | (reprfunc)O_repr, /*tp_repr*/ |
| 508 | 0, /*tp_as_number*/ |
| 509 | 0, /*tp_as_sequence*/ |
| 510 | 0, /*tp_as_mapping*/ |
| 511 | (hashfunc)0, /*tp_hash*/ |
| 512 | (ternaryfunc)0, /*tp_call*/ |
| 513 | (reprfunc)0, /*tp_str*/ |
| 514 | |
| 515 | /* Space for future expansion */ |
| 516 | 0L,0L,0L,0L, |
| 517 | Otype__doc__ /* Documentation string */ |
| 518 | }; |
| 519 | |
| 520 | /* End of code for StringO objects */ |
| 521 | /* -------------------------------------------------------- */ |
| 522 | |
| 523 | static PyObject * |
| 524 | I_close(self, args) |
| 525 | Iobject *self; |
| 526 | PyObject *args; |
| 527 | { |
| 528 | Py_DECREF(self->pbuf); |
| 529 | |
| 530 | self->pos = self->string_size = 0; |
| 531 | self->closed = 1; |
| 532 | |
| 533 | Py_INCREF(Py_None); |
| 534 | return Py_None; |
| 535 | } |
| 536 | |
| 537 | static struct PyMethodDef I_methods[] = { |
| 538 | {"read", (PyCFunction)O_read, 1, O_read__doc__}, |
| 539 | {"readline", (PyCFunction)O_readline, 0, O_readline__doc__}, |
| 540 | {"reset", (PyCFunction)O_reset, 0, O_reset__doc__}, |
| 541 | {"seek", (PyCFunction)O_seek, 1, O_seek__doc__}, |
| 542 | {"tell", (PyCFunction)O_tell, 0, O_tell__doc__}, |
| 543 | {"truncate", (PyCFunction)O_truncate, 0, O_truncate__doc__}, |
| 544 | {"isatty", (PyCFunction)O_isatty, 0, O_isatty__doc__}, |
| 545 | {"close", (PyCFunction)I_close, 0, O_close__doc__}, |
| 546 | {"flush", (PyCFunction)O_flush, 0, O_flush__doc__}, |
| 547 | {NULL, NULL} /* sentinel */ |
| 548 | }; |
| 549 | |
| 550 | /* ---------- */ |
| 551 | |
| 552 | |
| 553 | static Iobject * |
| 554 | newIobject(PyObject *s) |
| 555 | { |
| 556 | Iobject *self; |
| 557 | char *buf; |
| 558 | int size; |
| 559 | |
| 560 | UNLESS(buf=PyString_AsString(s)) return NULL; |
| 561 | UNLESS(-1 != (size=PyString_Size(s))) return NULL; |
| 562 | UNLESS(self = PyObject_NEW(Iobject, &Itype)) return NULL; |
| 563 | Py_INCREF(s); |
| 564 | self->buf=buf; |
| 565 | self->string_size=size; |
| 566 | self->pbuf=s; |
| 567 | self->pos=0; |
| 568 | self->closed = 0; |
| 569 | |
| 570 | return self; |
| 571 | } |
| 572 | |
| 573 | |
| 574 | static void |
| 575 | I_dealloc(self) |
| 576 | Iobject *self; |
| 577 | { |
| 578 | Py_DECREF(self->pbuf); |
| 579 | PyMem_DEL(self); |
| 580 | } |
| 581 | |
| 582 | static PyObject * |
| 583 | I_getattr(self, name) |
| 584 | Iobject *self; |
| 585 | char *name; |
| 586 | { |
| 587 | return Py_FindMethod(I_methods, (PyObject *)self, name); |
| 588 | } |
| 589 | |
| 590 | static char Itype__doc__[] = |
| 591 | "Simple type for treating strings as input file streams" |
| 592 | ; |
| 593 | |
| 594 | static PyTypeObject Itype = { |
| 595 | PyObject_HEAD_INIT(&PyType_Type) |
| 596 | 0, /*ob_size*/ |
| 597 | "StringI", /*tp_name*/ |
| 598 | sizeof(Iobject), /*tp_basicsize*/ |
| 599 | 0, /*tp_itemsize*/ |
| 600 | /* methods */ |
| 601 | (destructor)I_dealloc, /*tp_dealloc*/ |
| 602 | (printfunc)0, /*tp_print*/ |
| 603 | (getattrfunc)I_getattr, /*tp_getattr*/ |
| 604 | (setattrfunc)0, /*tp_setattr*/ |
| 605 | (cmpfunc)0, /*tp_compare*/ |
| 606 | (reprfunc)0, /*tp_repr*/ |
| 607 | 0, /*tp_as_number*/ |
| 608 | 0, /*tp_as_sequence*/ |
| 609 | 0, /*tp_as_mapping*/ |
| 610 | (hashfunc)0, /*tp_hash*/ |
| 611 | (ternaryfunc)0, /*tp_call*/ |
| 612 | (reprfunc)0, /*tp_str*/ |
| 613 | |
| 614 | /* Space for future expansion */ |
| 615 | 0L,0L,0L,0L, |
| 616 | Itype__doc__ /* Documentation string */ |
| 617 | }; |
| 618 | |
| 619 | /* End of code for StringI objects */ |
| 620 | /* -------------------------------------------------------- */ |
| 621 | |
| 622 | |
| 623 | static char IO_StringIO__doc__[] = |
| 624 | "StringIO([s]) -- Return a StringIO-like stream for reading or writing" |
| 625 | ; |
| 626 | |
| 627 | static PyObject * |
| 628 | IO_StringIO(self, args) |
| 629 | PyObject *self; /* Not used */ |
| 630 | PyObject *args; |
| 631 | { |
| 632 | PyObject *s=0; |
| 633 | |
| 634 | UNLESS(PyArg_ParseTuple(args, "|O", &s)) return NULL; |
| 635 | if(s) return (PyObject *)newIobject(s); |
| 636 | return (PyObject *)newOobject(128); |
| 637 | } |
| 638 | |
| 639 | /* List of methods defined in the module */ |
| 640 | |
| 641 | static struct PyMethodDef IO_methods[] = { |
| 642 | {"StringIO", (PyCFunction)IO_StringIO, 1, IO_StringIO__doc__}, |
| 643 | {NULL, NULL} /* sentinel */ |
| 644 | }; |
| 645 | |
| 646 | |
| 647 | /* Initialization function for the module (*must* be called initcStringIO) */ |
| 648 | |
| 649 | void |
| 650 | initcStringIO() |
| 651 | { |
| 652 | PyObject *m, *d; |
| 653 | |
| 654 | /* Create the module and add the functions */ |
| 655 | m = Py_InitModule4("cStringIO", IO_methods, |
| 656 | cStringIO_module_documentation, |
| 657 | (PyObject*)NULL,PYTHON_API_VERSION); |
| 658 | |
| 659 | /* Add some symbolic constants to the module */ |
| 660 | d = PyModule_GetDict(m); |
| 661 | ErrorObject = PyString_FromString("cStringIO.error"); |
| 662 | PyDict_SetItemString(d, "error", ErrorObject); |
| 663 | |
| 664 | PyDict_SetItemString(d,"cread", PyCObject_FromVoidPtr(O_cread,NULL)); |
| 665 | PyDict_SetItemString(d,"creadline", PyCObject_FromVoidPtr(O_creadline,NULL)); |
| 666 | PyDict_SetItemString(d,"cwrite", PyCObject_FromVoidPtr(O_cwrite,NULL)); |
| 667 | PyDict_SetItemString(d,"cgetvalue", PyCObject_FromVoidPtr(O_getval,NULL)); |
| 668 | PyDict_SetItemString(d,"NewInput", PyCObject_FromVoidPtr(newIobject,NULL)); |
| 669 | PyDict_SetItemString(d,"NewOutput", PyCObject_FromVoidPtr(newOobject,NULL)); |
| 670 | |
| 671 | PyDict_SetItemString(d,"InputType", (PyObject*)&Itype); |
| 672 | PyDict_SetItemString(d,"OutputType", (PyObject*)&Otype); |
| 673 | |
| 674 | |
| 675 | /* Check for errors */ |
| 676 | if (PyErr_Occurred()) |
| 677 | Py_FatalError("can't initialize module cStringIO"); |
| 678 | } |