Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1 | /* zlibmodule.c -- gzip-compatible data compression */ |
| 2 | |
| 3 | #include <Python.h> |
| 4 | #include <zlib.h> |
| 5 | |
| 6 | /* The following parameters are copied from zutil.h, version 0.95 */ |
| 7 | #define DEFLATED 8 |
| 8 | #if MAX_MEM_LEVEL >= 8 |
| 9 | # define DEF_MEM_LEVEL 8 |
| 10 | #else |
| 11 | # define DEF_MEM_LEVEL MAX_MEM_LEVEL |
| 12 | #endif |
| 13 | #define DEF_WBITS MAX_WBITS |
| 14 | |
| 15 | /* The output buffer will be increased in chunks of ADDCHUNK bytes. */ |
| 16 | #define ADDCHUNK 2048 |
| 17 | #define PyInit_zlib initzlib |
| 18 | |
| 19 | staticforward PyTypeObject Comptype; |
| 20 | staticforward PyTypeObject Decomptype; |
| 21 | |
| 22 | static PyObject *ZlibError; |
| 23 | |
| 24 | typedef struct |
| 25 | { |
| 26 | PyObject_HEAD |
| 27 | z_stream zst; |
| 28 | } compobject; |
| 29 | |
| 30 | static compobject * |
| 31 | newcompobject(type) |
| 32 | PyTypeObject *type; |
| 33 | { |
| 34 | compobject *self; |
| 35 | self = PyObject_NEW(compobject, type); |
| 36 | if (self == NULL) |
| 37 | return NULL; |
| 38 | return self; |
| 39 | } |
| 40 | |
| 41 | static PyObject * |
| 42 | PyZlib_compress(self, args) |
| 43 | PyObject *self; |
| 44 | PyObject *args; |
| 45 | { |
| 46 | PyObject *ReturnVal; |
| 47 | Byte *input, *output; |
| 48 | int length, level=Z_DEFAULT_COMPRESSION, err; |
| 49 | z_stream zst; |
| 50 | |
| 51 | if (!PyArg_ParseTuple(args, "s#|i", &input, &length, &level)) |
| 52 | return NULL; |
| 53 | zst.avail_out=length+length/1000+12+1; |
| 54 | output=(Byte*)malloc(zst.avail_out); |
| 55 | if (output==NULL) |
| 56 | { |
| 57 | PyErr_SetString(PyExc_MemoryError, |
| 58 | "Can't allocate memory to compress data"); |
| 59 | return NULL; |
| 60 | } |
| 61 | zst.zalloc=(alloc_func)zst.zfree=(free_func)Z_NULL; |
| 62 | zst.next_out=(Byte *)output; |
| 63 | zst.next_in =(Byte *)input; |
| 64 | zst.avail_in=length; |
| 65 | err=deflateInit(&zst, level); |
| 66 | switch(err) |
| 67 | { |
| 68 | case(Z_OK): |
| 69 | break; |
| 70 | case(Z_MEM_ERROR): |
| 71 | PyErr_SetString(PyExc_MemoryError, |
| 72 | "Out of memory while compressing data"); |
| 73 | free(output); |
| 74 | return NULL; |
| 75 | break; |
| 76 | case(Z_STREAM_ERROR): |
| 77 | PyErr_SetString(ZlibError, |
| 78 | "Bad compression level"); |
| 79 | free(output); |
| 80 | return NULL; |
| 81 | break; |
| 82 | default: |
| 83 | { |
| 84 | char temp[500]; |
| 85 | if (zst.msg==Z_NULL) zst.msg=""; |
| 86 | sprintf(temp, "Error %i while compressing data [%s]", err, zst.msg); |
| 87 | PyErr_SetString(ZlibError, temp); |
| 88 | deflateEnd(&zst); |
| 89 | free(output); |
| 90 | return NULL; |
| 91 | } |
| 92 | break; |
| 93 | } |
| 94 | |
| 95 | err=deflate(&zst, Z_FINISH); |
| 96 | switch(err) |
| 97 | { |
| 98 | case(Z_STREAM_END): |
| 99 | break; |
| 100 | /* Are there other errors to be trapped here? */ |
| 101 | default: |
| 102 | { |
| 103 | char temp[500]; |
| 104 | if (zst.msg==Z_NULL) zst.msg=""; |
| 105 | sprintf(temp, "Error %i while compressing data [%s]", err, zst.msg); |
| 106 | PyErr_SetString(ZlibError, temp); |
| 107 | deflateEnd(&zst); |
| 108 | free(output); |
| 109 | return NULL; |
| 110 | } |
| 111 | } |
| 112 | err=deflateEnd(&zst); |
| 113 | if (err!=Z_OK) |
| 114 | { |
| 115 | char temp[500]; |
| 116 | if (zst.msg==Z_NULL) zst.msg=""; |
| 117 | sprintf(temp, "Error %i while finishing data compression [%s]", |
| 118 | err, zst.msg); |
| 119 | PyErr_SetString(ZlibError, temp); |
| 120 | free(output); |
| 121 | return NULL; |
| 122 | } |
| 123 | ReturnVal=PyString_FromStringAndSize(output, zst.total_out); |
| 124 | free(output); |
| 125 | return ReturnVal; |
| 126 | } |
| 127 | |
| 128 | static PyObject * |
| 129 | PyZlib_decompress(self, args) |
| 130 | PyObject *self; |
| 131 | PyObject *args; |
| 132 | { |
| 133 | PyObject *ReturnVal; |
| 134 | Byte *input, *output; |
| 135 | int length, err; |
| 136 | z_stream zst; |
| 137 | if (!PyArg_ParseTuple(args, "s#", &input, &length)) |
| 138 | return NULL; |
| 139 | |
| 140 | zst.avail_in=length; |
| 141 | zst.avail_out=length=length*2; |
| 142 | output=(Byte*)malloc(zst.avail_out); |
| 143 | if (output==NULL) |
| 144 | { |
| 145 | PyErr_SetString(PyExc_MemoryError, |
| 146 | "Can't allocate memory to decompress data"); |
| 147 | return NULL; |
| 148 | } |
| 149 | zst.zalloc=(alloc_func)zst.zfree=(free_func)Z_NULL; |
| 150 | zst.next_out=(Byte *)output; |
| 151 | zst.next_in =(Byte *)input; |
| 152 | err=inflateInit(&zst); |
| 153 | switch(err) |
| 154 | { |
| 155 | case(Z_OK): |
| 156 | break; |
| 157 | case(Z_MEM_ERROR): |
| 158 | PyErr_SetString(PyExc_MemoryError, |
| 159 | "Out of memory while decompressing data"); |
| 160 | free(output); |
| 161 | return NULL; |
| 162 | default: |
| 163 | { |
| 164 | char temp[500]; |
| 165 | if (zst.msg==Z_NULL) zst.msg=""; |
| 166 | sprintf(temp, "Error %i while preparing to decompress data [%s]", |
| 167 | err, zst.msg); |
| 168 | PyErr_SetString(ZlibError, temp); |
| 169 | inflateEnd(&zst); |
| 170 | free(output); |
| 171 | return NULL; |
| 172 | } |
| 173 | } |
| 174 | do |
| 175 | { |
| 176 | err=inflate(&zst, Z_FINISH); |
| 177 | switch(err) |
| 178 | { |
| 179 | case(Z_OK): |
| 180 | case(Z_STREAM_END): |
| 181 | output=(Byte *)realloc(output, length+ADDCHUNK); |
| 182 | if (output==NULL) |
| 183 | { |
| 184 | PyErr_SetString(PyExc_MemoryError, |
| 185 | "Out of memory while decompressing data"); |
| 186 | inflateEnd(&zst); |
| 187 | return NULL; |
| 188 | } |
| 189 | zst.next_out=output+length; |
| 190 | zst.avail_out=ADDCHUNK; |
| 191 | length += ADDCHUNK; |
| 192 | break; |
| 193 | default: |
| 194 | { |
| 195 | char temp[500]; |
| 196 | if (zst.msg==Z_NULL) zst.msg=""; |
| 197 | sprintf(temp, "Error %i while decompressing data: [%s]", |
| 198 | err, zst.msg); |
| 199 | PyErr_SetString(ZlibError, temp); |
| 200 | inflateEnd(&zst); |
| 201 | return NULL; |
| 202 | } |
| 203 | } |
| 204 | } while(err!=Z_STREAM_END); |
| 205 | |
| 206 | err=inflateEnd(&zst); |
| 207 | if (err!=Z_OK) |
| 208 | { |
| 209 | char temp[500]; |
| 210 | if (zst.msg==Z_NULL) zst.msg=""; |
| 211 | sprintf(temp, "Error %i while finishing data decompression [%s]", |
| 212 | err, zst.msg); |
| 213 | PyErr_SetString(ZlibError, temp); |
| 214 | free(output); |
| 215 | return NULL; |
| 216 | } |
| 217 | ReturnVal=PyString_FromStringAndSize(output, zst.total_out); |
| 218 | free(output); |
| 219 | return ReturnVal; |
| 220 | } |
| 221 | |
| 222 | static PyObject * |
| 223 | PyZlib_compressobj(selfptr, args) |
| 224 | PyObject *selfptr; |
| 225 | PyObject *args; |
| 226 | { |
| 227 | compobject *self; |
| 228 | int level=Z_DEFAULT_COMPRESSION, method=DEFLATED; |
| 229 | int wbits=MAX_WBITS, memLevel=DEF_MEM_LEVEL, strategy=0, err; |
| 230 | /* XXX Argh! Is there a better way to have multiple levels of */ |
| 231 | /* optional arguments? */ |
| 232 | if (!PyArg_ParseTuple(args, "iiiii", &level, &method, &wbits, &memLevel, &strategy)) |
| 233 | { |
| 234 | PyErr_Clear(); |
| 235 | if (!PyArg_ParseTuple(args, "iiii", &level, &method, &wbits, |
| 236 | &memLevel)) |
| 237 | { |
| 238 | PyErr_Clear(); |
| 239 | if (!PyArg_ParseTuple(args, "iii", &level, &method, &wbits)) |
| 240 | { |
| 241 | PyErr_Clear(); |
| 242 | if (!PyArg_ParseTuple(args, "ii", &level, &method)) |
| 243 | { |
| 244 | PyErr_Clear(); |
| 245 | if (!PyArg_ParseTuple(args, "i", &level)) |
| 246 | { |
| 247 | PyErr_Clear(); |
| 248 | if (!PyArg_ParseTuple(args, "")) |
| 249 | return (NULL); |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | } |
| 254 | } |
| 255 | self=newcompobject(&Comptype); |
| 256 | if (self==NULL) return(NULL); |
| 257 | self->zst.zalloc=(alloc_func)self->zst.zfree=(free_func)Z_NULL; |
| 258 | err=deflateInit2(&self->zst, level, method, wbits, memLevel, strategy); |
| 259 | switch(err) |
| 260 | { |
| 261 | case (Z_OK): |
| 262 | return (PyObject*)self; |
| 263 | break; |
| 264 | case (Z_MEM_ERROR): |
| 265 | PyErr_SetString(PyExc_MemoryError, |
| 266 | "Can't allocate memory for compression object"); |
| 267 | return NULL; |
| 268 | break; |
| 269 | case(Z_STREAM_ERROR): |
| 270 | PyErr_SetString(PyExc_ValueError, |
| 271 | "Invalid compression level"); |
| 272 | return NULL; |
| 273 | break; |
| 274 | default: |
| 275 | { |
| 276 | char temp[500]; |
| 277 | if (self->zst.msg==Z_NULL) self->zst.msg=""; |
| 278 | sprintf(temp, "Error %i while creating compression object [%s]", |
| 279 | err, self->zst.msg); |
| 280 | PyErr_SetString(ZlibError, temp); |
| 281 | return NULL; |
| 282 | break; |
| 283 | } |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | static PyObject * |
| 288 | PyZlib_decompressobj(selfptr, args) |
| 289 | PyObject *selfptr; |
| 290 | PyObject *args; |
| 291 | { |
| 292 | int wbits=DEF_WBITS, err; |
| 293 | compobject *self; |
| 294 | if (!PyArg_ParseTuple(args, "|i", &wbits)) |
| 295 | { |
| 296 | return NULL; |
| 297 | } |
| 298 | self=newcompobject(&Decomptype); |
| 299 | if (self==NULL) return(NULL); |
| 300 | self->zst.zalloc=(alloc_func)self->zst.zfree=(free_func)Z_NULL; |
| 301 | /* XXX If illegal values of wbits are allowed to get here, Python |
| 302 | coredumps, instead of raising an exception as it should. |
| 303 | This is a bug in zlib 0.95; I have reported it. */ |
| 304 | err=inflateInit2(&self->zst, wbits); |
| 305 | switch(err) |
| 306 | { |
| 307 | case (Z_OK): |
| 308 | return (PyObject*)self; |
| 309 | break; |
| 310 | case (Z_MEM_ERROR): |
| 311 | PyErr_SetString(PyExc_MemoryError, |
| 312 | "Can't allocate memory for decompression object"); |
| 313 | return NULL; |
| 314 | break; |
| 315 | default: |
| 316 | { |
| 317 | char temp[500]; |
| 318 | if (self->zst.msg==Z_NULL) self->zst.msg=""; |
| 319 | sprintf(temp, "Error %i while creating decompression object [%s]", |
| 320 | err, self->zst.msg); |
| 321 | PyErr_SetString(ZlibError, temp); |
| 322 | return NULL; |
| 323 | break; |
| 324 | } |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | static void |
| 329 | Comp_dealloc(self) |
| 330 | compobject *self; |
| 331 | { |
| 332 | int err; |
| 333 | err=deflateEnd(&self->zst); /* Deallocate zstream structure */ |
| 334 | } |
| 335 | |
| 336 | static void |
| 337 | Decomp_dealloc(self) |
| 338 | compobject *self; |
| 339 | { |
| 340 | int err; |
| 341 | err=inflateEnd(&self->zst); /* Deallocate zstream structure */ |
| 342 | } |
| 343 | |
| 344 | static PyObject * |
| 345 | PyZlib_objcompress(self, args) |
| 346 | compobject *self; |
| 347 | PyObject *args; |
| 348 | { |
| 349 | int length=0, err, inplen; |
| 350 | Byte *buf=NULL; |
| 351 | PyObject *RetVal; |
| 352 | Byte *input; |
| 353 | |
| 354 | if (!PyArg_ParseTuple(args, "s#", &input, &inplen)) |
| 355 | return NULL; |
| 356 | self->zst.avail_in=inplen; |
| 357 | self->zst.next_in=input; |
| 358 | do |
| 359 | { |
| 360 | buf=(Byte *)realloc(buf, length+ADDCHUNK); |
| 361 | if (buf==NULL) |
| 362 | { |
| 363 | PyErr_SetString(PyExc_MemoryError, |
| 364 | "Can't allocate memory to compress data"); |
| 365 | return NULL; |
| 366 | } |
| 367 | self->zst.next_out=buf+length; |
| 368 | self->zst.avail_out=ADDCHUNK; |
| 369 | length += ADDCHUNK; |
| 370 | err=deflate(&(self->zst), Z_NO_FLUSH); |
| 371 | } while (self->zst.avail_in!=0 && err==Z_OK); |
| 372 | if (err!=Z_OK) |
| 373 | { |
| 374 | char temp[500]; |
| 375 | if (self->zst.msg==Z_NULL) self->zst.msg=""; |
| 376 | sprintf(temp, "Error %i while compressing [%s]", |
| 377 | err, self->zst.msg); |
| 378 | PyErr_SetString(ZlibError, temp); |
| 379 | return NULL; |
| 380 | } |
| 381 | RetVal=PyString_FromStringAndSize(buf, self->zst.next_out-buf); |
| 382 | free(buf); |
| 383 | return RetVal; |
| 384 | } |
| 385 | |
| 386 | static PyObject * |
| 387 | PyZlib_objdecompress(self, args) |
| 388 | compobject *self; |
| 389 | PyObject *args; |
| 390 | { |
| 391 | int length=0, err, inplen; |
| 392 | Byte *buf=NULL; |
| 393 | PyObject *RetVal; |
| 394 | Byte *input; |
| 395 | if (!PyArg_ParseTuple(args, "s#", &input, &inplen)) |
| 396 | return NULL; |
| 397 | self->zst.avail_in=inplen; |
| 398 | self->zst.next_in=input; |
| 399 | do |
| 400 | { |
| 401 | buf=(Byte *)realloc(buf, length+ADDCHUNK); |
| 402 | if (buf==NULL) |
| 403 | { |
| 404 | PyErr_SetString(PyExc_MemoryError, |
| 405 | "Can't allocate memory to decompress data"); |
| 406 | return NULL; |
| 407 | } |
| 408 | self->zst.next_out=buf+length; |
| 409 | self->zst.avail_out=ADDCHUNK; |
| 410 | length += ADDCHUNK; |
| 411 | err=inflate(&(self->zst), Z_NO_FLUSH); |
| 412 | } while (self->zst.avail_in!=0 && err==Z_OK); |
| 413 | if (err!=Z_OK && err!=Z_STREAM_END) |
| 414 | { |
| 415 | char temp[500]; |
| 416 | if (self->zst.msg==Z_NULL) self->zst.msg=""; |
| 417 | sprintf(temp, "Error %i while decompressing [%s]", |
| 418 | err, self->zst.msg); |
| 419 | PyErr_SetString(ZlibError, temp); |
| 420 | return NULL; |
| 421 | } |
| 422 | RetVal=PyString_FromStringAndSize(buf, self->zst.next_out-buf); |
| 423 | free(buf); |
| 424 | return RetVal; |
| 425 | } |
| 426 | |
| 427 | static PyObject * |
| 428 | PyZlib_flush(self, args) |
| 429 | compobject *self; |
| 430 | PyObject *args; |
| 431 | { |
| 432 | int length=0, err; |
| 433 | Byte *buf=NULL; |
| 434 | PyObject *RetVal; |
| 435 | |
| 436 | if (!PyArg_NoArgs(args)) |
| 437 | return NULL; |
| 438 | self->zst.avail_in=0; |
| 439 | do |
| 440 | { |
| 441 | buf=(Byte *)realloc(buf, length+ADDCHUNK); |
| 442 | if (buf==NULL) |
| 443 | { |
| 444 | PyErr_SetString(PyExc_MemoryError, |
| 445 | "Can't allocate memory to compress data"); |
| 446 | return NULL; |
| 447 | } |
| 448 | self->zst.next_out=buf+length; |
| 449 | self->zst.avail_out=ADDCHUNK; |
| 450 | length += ADDCHUNK; |
| 451 | err=deflate(&(self->zst), Z_FINISH); |
| 452 | } while (err==Z_OK); |
| 453 | if (err!=Z_STREAM_END) |
| 454 | { |
| 455 | char temp[500]; |
| 456 | if (self->zst.msg==Z_NULL) self->zst.msg=""; |
| 457 | sprintf(temp, "Error %i while compressing [%s]", |
| 458 | err, self->zst.msg); |
| 459 | PyErr_SetString(ZlibError, temp); |
| 460 | return NULL; |
| 461 | } |
| 462 | RetVal=PyString_FromStringAndSize(buf, self->zst.next_out-buf); |
| 463 | free(buf); |
| 464 | err=deflateEnd(&(self->zst)); |
| 465 | if (err!=Z_OK) |
| 466 | { |
| 467 | char temp[500]; |
| 468 | if (self->zst.msg==Z_NULL) self->zst.msg=""; |
| 469 | sprintf(temp, "Error %i while flushing compression object [%s]", |
| 470 | err, self->zst.msg); |
| 471 | PyErr_SetString(ZlibError, temp); |
| 472 | return NULL; |
| 473 | } |
| 474 | return RetVal; |
| 475 | } |
| 476 | |
| 477 | static PyObject * |
| 478 | PyZlib_unflush(self, args) |
| 479 | compobject *self; |
| 480 | PyObject *args; |
| 481 | { |
| 482 | int length=0, err; |
| 483 | Byte *buf=NULL; |
| 484 | PyObject *RetVal; |
| 485 | |
| 486 | if (!PyArg_NoArgs(args)) |
| 487 | return NULL; |
| 488 | self->zst.avail_in=0; |
| 489 | do |
| 490 | { |
| 491 | buf=(Byte *)realloc(buf, length+ADDCHUNK); |
| 492 | if (buf==NULL) |
| 493 | { |
| 494 | PyErr_SetString(PyExc_MemoryError, |
| 495 | "Can't allocate memory to decompress data"); |
| 496 | return NULL; |
| 497 | } |
| 498 | self->zst.next_out=buf+length; |
| 499 | length += ADDCHUNK; |
| 500 | err=inflate(&(self->zst), Z_FINISH); |
| 501 | } while (err==Z_OK); |
| 502 | if (err!=Z_STREAM_END) |
| 503 | { |
| 504 | char temp[500]; |
| 505 | if (self->zst.msg==Z_NULL) self->zst.msg=""; |
| 506 | sprintf(temp, "Error %i while decompressing [%s]", |
| 507 | err, self->zst.msg); |
| 508 | PyErr_SetString(ZlibError, temp); |
| 509 | return NULL; |
| 510 | } |
| 511 | RetVal=PyString_FromStringAndSize(buf, self->zst.next_out - buf); |
| 512 | free(buf); |
| 513 | err=inflateEnd(&(self->zst)); |
| 514 | if (err!=Z_OK) |
| 515 | { |
| 516 | char temp[500]; |
| 517 | if (self->zst.msg==Z_NULL) self->zst.msg=""; |
| 518 | sprintf(temp, "Error %i while flushing decompression object [%s]", |
| 519 | err, self->zst.msg); |
| 520 | PyErr_SetString(ZlibError, temp); |
| 521 | return NULL; |
| 522 | } |
| 523 | return RetVal; |
| 524 | } |
| 525 | |
| 526 | static PyMethodDef comp_methods[] = |
| 527 | { |
| 528 | {"compress", PyZlib_objcompress, 1}, |
| 529 | {"flush", PyZlib_flush, 0}, |
| 530 | {NULL, NULL} |
| 531 | }; |
| 532 | |
| 533 | static PyMethodDef Decomp_methods[] = |
| 534 | { |
| 535 | {"decompress", PyZlib_objdecompress, 1}, |
| 536 | {"flush", PyZlib_unflush, 0}, |
| 537 | {NULL, NULL} |
| 538 | }; |
| 539 | |
| 540 | static PyObject * |
| 541 | Comp_getattr(self, name) |
| 542 | compobject *self; |
| 543 | char *name; |
| 544 | { |
| 545 | return Py_FindMethod(comp_methods, (PyObject *)self, name); |
| 546 | } |
| 547 | |
| 548 | static PyObject * |
| 549 | Decomp_getattr(self, name) |
| 550 | compobject *self; |
| 551 | char *name; |
| 552 | { |
| 553 | return Py_FindMethod(Decomp_methods, (PyObject *)self, name); |
| 554 | } |
| 555 | |
| 556 | static PyObject * |
| 557 | PyZlib_adler32(self, args) |
| 558 | PyObject *self, *args; |
| 559 | { |
| 560 | uLong adler32val=adler32(0L, Z_NULL, 0); |
| 561 | Byte *buf; |
| 562 | int len; |
| 563 | |
| 564 | if (!PyArg_ParseTuple(args, "s#|l", &buf, &len, &adler32val)) |
| 565 | { |
| 566 | return NULL; |
| 567 | } |
| 568 | adler32val=adler32(adler32val, buf, len); |
| 569 | return Py_BuildValue("l", adler32val); |
| 570 | } |
| 571 | |
| 572 | |
| 573 | static PyObject * |
| 574 | PyZlib_crc32(self, args) |
| 575 | PyObject *self, *args; |
| 576 | { |
| 577 | uLong crc32val=crc32(0L, Z_NULL, 0); |
| 578 | Byte *buf; |
| 579 | int len; |
| 580 | if (!PyArg_ParseTuple(args, "s#|l", &buf, &len, &crc32val)) |
| 581 | { |
| 582 | return NULL; |
| 583 | } |
| 584 | crc32val=crc32(crc32val, buf, len); |
| 585 | return Py_BuildValue("l", crc32val); |
| 586 | } |
| 587 | |
| 588 | |
| 589 | static PyMethodDef zlib_methods[] = |
| 590 | { |
| 591 | {"adler32", PyZlib_adler32, 1}, |
| 592 | {"compress", PyZlib_compress, 1}, |
| 593 | {"compressobj", PyZlib_compressobj, 1}, |
| 594 | {"crc32", PyZlib_crc32, 1}, |
| 595 | {"decompress", PyZlib_decompress, 1}, |
| 596 | {"decompressobj", PyZlib_decompressobj, 1}, |
| 597 | {NULL, NULL} |
| 598 | }; |
| 599 | |
| 600 | statichere PyTypeObject Comptype = { |
| 601 | PyObject_HEAD_INIT(&PyType_Type) |
| 602 | 0, |
| 603 | "Compress", |
| 604 | sizeof(compobject), |
| 605 | 0, |
| 606 | (destructor)Comp_dealloc, /*tp_dealloc*/ |
| 607 | 0, /*tp_print*/ |
| 608 | (getattrfunc)Comp_getattr, /*tp_getattr*/ |
| 609 | 0, /*tp_setattr*/ |
| 610 | 0, /*tp_compare*/ |
| 611 | 0, /*tp_repr*/ |
| 612 | 0, /*tp_as_number*/ |
| 613 | 0, /*tp_as_sequence*/ |
| 614 | 0, /*tp_as_mapping*/ |
| 615 | }; |
| 616 | |
| 617 | statichere PyTypeObject Decomptype = { |
| 618 | PyObject_HEAD_INIT(&PyType_Type) |
| 619 | 0, |
| 620 | "Decompress", |
| 621 | sizeof(compobject), |
| 622 | 0, |
| 623 | (destructor)Decomp_dealloc, /*tp_dealloc*/ |
| 624 | 0, /*tp_print*/ |
| 625 | (getattrfunc)Decomp_getattr, /*tp_getattr*/ |
| 626 | 0, /*tp_setattr*/ |
| 627 | 0, /*tp_compare*/ |
| 628 | 0, /*tp_repr*/ |
| 629 | 0, /*tp_as_number*/ |
| 630 | 0, /*tp_as_sequence*/ |
| 631 | 0, /*tp_as_mapping*/ |
| 632 | }; |
| 633 | |
| 634 | /* The following insint() routine was blatantly ripped off from |
| 635 | socketmodule.c */ |
| 636 | |
| 637 | /* Convenience routine to export an integer value. |
| 638 | For simplicity, errors (which are unlikely anyway) are ignored. */ |
| 639 | static void |
| 640 | insint(d, name, value) |
| 641 | PyObject *d; |
| 642 | char *name; |
| 643 | int value; |
| 644 | { |
| 645 | PyObject *v = PyInt_FromLong((long) value); |
| 646 | if (v == NULL) { |
| 647 | /* Don't bother reporting this error */ |
| 648 | PyErr_Clear(); |
| 649 | } |
| 650 | else { |
| 651 | PyDict_SetItemString(d, name, v); |
| 652 | Py_DECREF(v); |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | void |
| 657 | PyInit_zlib() |
| 658 | { |
| 659 | PyObject *m, *d; |
| 660 | m = Py_InitModule("zlib", zlib_methods); |
| 661 | d = PyModule_GetDict(m); |
| 662 | ZlibError = Py_BuildValue("s", "zlib.error"); |
| 663 | PyDict_SetItemString(d, "error", ZlibError); |
| 664 | insint(d, "MAX_WBITS", MAX_WBITS); |
| 665 | insint(d, "DEFLATED", DEFLATED); |
| 666 | insint(d, "DEF_MEM_LEVEL", DEF_MEM_LEVEL); |
| 667 | |
| 668 | if (PyErr_Occurred()) |
| 669 | Py_FatalError("can't initialize module zlib"); |
| 670 | } |