Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1 | /* |
| 2 | |
| 3 | python-bz2 - python bz2 library interface |
| 4 | |
| 5 | Copyright (c) 2002 Gustavo Niemeyer <niemeyer@conectiva.com> |
| 6 | Copyright (c) 2002 Python Software Foundation; All Rights Reserved |
| 7 | |
| 8 | */ |
| 9 | |
Martin v. Löwis | e17af7b | 2002-11-23 09:16:19 +0000 | [diff] [blame] | 10 | #include "Python.h" |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 11 | #include <stdio.h> |
| 12 | #include <bzlib.h> |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 13 | #include "structmember.h" |
| 14 | |
| 15 | #ifdef WITH_THREAD |
| 16 | #include "pythread.h" |
| 17 | #endif |
| 18 | |
| 19 | static char __author__[] = |
| 20 | "The bz2 python module was written by:\n\ |
| 21 | \n\ |
| 22 | Gustavo Niemeyer <niemeyer@conectiva.com>\n\ |
| 23 | "; |
| 24 | |
| 25 | #define BUF(v) PyString_AS_STRING((PyStringObject *)v) |
| 26 | |
| 27 | #define MODE_CLOSED 0 |
| 28 | #define MODE_READ 1 |
| 29 | #define MODE_READ_EOF 2 |
| 30 | #define MODE_WRITE 3 |
| 31 | |
| 32 | #define BZ2FileObject_Check(v) ((v)->ob_type == &BZ2File_Type) |
| 33 | |
| 34 | #if SIZEOF_LONG >= 8 |
| 35 | #define BZS_TOTAL_OUT(bzs) \ |
| 36 | (((long)bzs->total_out_hi32 << 32) + bzs->total_out_lo32) |
| 37 | #elif SIZEOF_LONG_LONG >= 8 |
| 38 | #define BZS_TOTAL_OUT(bzs) \ |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 39 | (((LONG_LONG)bzs->total_out_hi32 << 32) + bzs->total_out_lo32) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 40 | #else |
| 41 | #define BZS_TOTAL_OUT(bzs) \ |
| 42 | bzs->total_out_lo32; |
| 43 | #endif |
| 44 | |
| 45 | #ifdef WITH_THREAD |
| 46 | #define ACQUIRE_LOCK(obj) PyThread_acquire_lock(obj->lock, 1) |
| 47 | #define RELEASE_LOCK(obj) PyThread_release_lock(obj->lock) |
| 48 | #else |
| 49 | #define ACQUIRE_LOCK(obj) |
| 50 | #define RELEASE_LOCK(obj) |
| 51 | #endif |
| 52 | |
| 53 | #ifdef WITH_UNIVERSAL_NEWLINES |
| 54 | /* Bits in f_newlinetypes */ |
| 55 | #define NEWLINE_UNKNOWN 0 /* No newline seen, yet */ |
| 56 | #define NEWLINE_CR 1 /* \r newline seen */ |
| 57 | #define NEWLINE_LF 2 /* \n newline seen */ |
| 58 | #define NEWLINE_CRLF 4 /* \r\n newline seen */ |
| 59 | #endif |
| 60 | |
| 61 | /* ===================================================================== */ |
| 62 | /* Structure definitions. */ |
| 63 | |
| 64 | typedef struct { |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 65 | PyObject_HEAD |
| 66 | PyObject *file; |
| 67 | |
| 68 | char* f_buf; /* Allocated readahead buffer */ |
| 69 | char* f_bufend; /* Points after last occupied position */ |
| 70 | char* f_bufptr; /* Current buffer position */ |
| 71 | |
| 72 | int f_softspace; /* Flag used by 'print' command */ |
| 73 | |
| 74 | #ifdef WITH_UNIVERSAL_NEWLINES |
| 75 | int f_univ_newline; /* Handle any newline convention */ |
| 76 | int f_newlinetypes; /* Types of newlines seen */ |
| 77 | int f_skipnextlf; /* Skip next \n */ |
| 78 | #endif |
| 79 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 80 | BZFILE *fp; |
| 81 | int mode; |
| 82 | long pos; |
| 83 | long size; |
| 84 | #ifdef WITH_THREAD |
| 85 | PyThread_type_lock lock; |
| 86 | #endif |
| 87 | } BZ2FileObject; |
| 88 | |
| 89 | typedef struct { |
| 90 | PyObject_HEAD |
| 91 | bz_stream bzs; |
| 92 | int running; |
| 93 | #ifdef WITH_THREAD |
| 94 | PyThread_type_lock lock; |
| 95 | #endif |
| 96 | } BZ2CompObject; |
| 97 | |
| 98 | typedef struct { |
| 99 | PyObject_HEAD |
| 100 | bz_stream bzs; |
| 101 | int running; |
| 102 | PyObject *unused_data; |
| 103 | #ifdef WITH_THREAD |
| 104 | PyThread_type_lock lock; |
| 105 | #endif |
| 106 | } BZ2DecompObject; |
| 107 | |
| 108 | /* ===================================================================== */ |
| 109 | /* Utility functions. */ |
| 110 | |
| 111 | static int |
| 112 | Util_CatchBZ2Error(int bzerror) |
| 113 | { |
| 114 | int ret = 0; |
| 115 | switch(bzerror) { |
| 116 | case BZ_OK: |
| 117 | case BZ_STREAM_END: |
| 118 | break; |
| 119 | |
| 120 | case BZ_CONFIG_ERROR: |
| 121 | PyErr_SetString(PyExc_SystemError, |
| 122 | "the bz2 library was not compiled " |
| 123 | "correctly"); |
| 124 | ret = 1; |
| 125 | break; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 126 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 127 | case BZ_PARAM_ERROR: |
| 128 | PyErr_SetString(PyExc_ValueError, |
| 129 | "the bz2 library has received wrong " |
| 130 | "parameters"); |
| 131 | ret = 1; |
| 132 | break; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 133 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 134 | case BZ_MEM_ERROR: |
| 135 | PyErr_NoMemory(); |
| 136 | ret = 1; |
| 137 | break; |
| 138 | |
| 139 | case BZ_DATA_ERROR: |
| 140 | case BZ_DATA_ERROR_MAGIC: |
| 141 | PyErr_SetString(PyExc_IOError, "invalid data stream"); |
| 142 | ret = 1; |
| 143 | break; |
| 144 | |
| 145 | case BZ_IO_ERROR: |
| 146 | PyErr_SetString(PyExc_IOError, "unknown IO error"); |
| 147 | ret = 1; |
| 148 | break; |
| 149 | |
| 150 | case BZ_UNEXPECTED_EOF: |
| 151 | PyErr_SetString(PyExc_EOFError, |
| 152 | "compressed file ended before the " |
| 153 | "logical end-of-stream was detected"); |
| 154 | ret = 1; |
| 155 | break; |
| 156 | |
| 157 | case BZ_SEQUENCE_ERROR: |
| 158 | PyErr_SetString(PyExc_RuntimeError, |
| 159 | "wrong sequence of bz2 library " |
| 160 | "commands used"); |
| 161 | ret = 1; |
| 162 | break; |
| 163 | } |
| 164 | return ret; |
| 165 | } |
| 166 | |
| 167 | #if BUFSIZ < 8192 |
| 168 | #define SMALLCHUNK 8192 |
| 169 | #else |
| 170 | #define SMALLCHUNK BUFSIZ |
| 171 | #endif |
| 172 | |
| 173 | #if SIZEOF_INT < 4 |
| 174 | #define BIGCHUNK (512 * 32) |
| 175 | #else |
| 176 | #define BIGCHUNK (512 * 1024) |
| 177 | #endif |
| 178 | |
| 179 | /* This is a hacked version of Python's fileobject.c:new_buffersize(). */ |
| 180 | static size_t |
| 181 | Util_NewBufferSize(size_t currentsize) |
| 182 | { |
| 183 | if (currentsize > SMALLCHUNK) { |
| 184 | /* Keep doubling until we reach BIGCHUNK; |
| 185 | then keep adding BIGCHUNK. */ |
| 186 | if (currentsize <= BIGCHUNK) |
| 187 | return currentsize + currentsize; |
| 188 | else |
| 189 | return currentsize + BIGCHUNK; |
| 190 | } |
| 191 | return currentsize + SMALLCHUNK; |
| 192 | } |
| 193 | |
| 194 | /* This is a hacked version of Python's fileobject.c:get_line(). */ |
| 195 | static PyObject * |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 196 | Util_GetLine(BZ2FileObject *f, int n) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 197 | { |
| 198 | char c; |
| 199 | char *buf, *end; |
| 200 | size_t total_v_size; /* total # of slots in buffer */ |
| 201 | size_t used_v_size; /* # used slots in buffer */ |
| 202 | size_t increment; /* amount to increment the buffer */ |
| 203 | PyObject *v; |
| 204 | int bzerror; |
| 205 | #ifdef WITH_UNIVERSAL_NEWLINES |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 206 | int newlinetypes = f->f_newlinetypes; |
| 207 | int skipnextlf = f->f_skipnextlf; |
| 208 | int univ_newline = f->f_univ_newline; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 209 | #endif |
| 210 | |
| 211 | total_v_size = n > 0 ? n : 100; |
| 212 | v = PyString_FromStringAndSize((char *)NULL, total_v_size); |
| 213 | if (v == NULL) |
| 214 | return NULL; |
| 215 | |
| 216 | buf = BUF(v); |
| 217 | end = buf + total_v_size; |
| 218 | |
| 219 | for (;;) { |
| 220 | Py_BEGIN_ALLOW_THREADS |
| 221 | #ifdef WITH_UNIVERSAL_NEWLINES |
| 222 | if (univ_newline) { |
| 223 | while (1) { |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 224 | BZ2_bzRead(&bzerror, f->fp, &c, 1); |
| 225 | f->pos++; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 226 | if (bzerror != BZ_OK || buf == end) |
| 227 | break; |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 228 | if (skipnextlf) { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 229 | skipnextlf = 0; |
| 230 | if (c == '\n') { |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 231 | /* Seeing a \n here with |
| 232 | * skipnextlf true means we |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 233 | * saw a \r before. |
| 234 | */ |
| 235 | newlinetypes |= NEWLINE_CRLF; |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 236 | BZ2_bzRead(&bzerror, f->fp, |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 237 | &c, 1); |
| 238 | if (bzerror != BZ_OK) |
| 239 | break; |
| 240 | } else { |
| 241 | newlinetypes |= NEWLINE_CR; |
| 242 | } |
| 243 | } |
| 244 | if (c == '\r') { |
| 245 | skipnextlf = 1; |
| 246 | c = '\n'; |
| 247 | } else if ( c == '\n') |
| 248 | newlinetypes |= NEWLINE_LF; |
| 249 | *buf++ = c; |
| 250 | if (c == '\n') break; |
| 251 | } |
| 252 | if (bzerror == BZ_STREAM_END && skipnextlf) |
| 253 | newlinetypes |= NEWLINE_CR; |
| 254 | } else /* If not universal newlines use the normal loop */ |
| 255 | #endif |
| 256 | do { |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 257 | BZ2_bzRead(&bzerror, f->fp, &c, 1); |
| 258 | f->pos++; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 259 | *buf++ = c; |
| 260 | } while (bzerror == BZ_OK && c != '\n' && buf != end); |
| 261 | Py_END_ALLOW_THREADS |
| 262 | #ifdef WITH_UNIVERSAL_NEWLINES |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 263 | f->f_newlinetypes = newlinetypes; |
| 264 | f->f_skipnextlf = skipnextlf; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 265 | #endif |
| 266 | if (bzerror == BZ_STREAM_END) { |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 267 | f->size = f->pos; |
| 268 | f->mode = MODE_READ_EOF; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 269 | break; |
| 270 | } else if (bzerror != BZ_OK) { |
| 271 | Util_CatchBZ2Error(bzerror); |
| 272 | Py_DECREF(v); |
| 273 | return NULL; |
| 274 | } |
| 275 | if (c == '\n') |
| 276 | break; |
| 277 | /* Must be because buf == end */ |
| 278 | if (n > 0) |
| 279 | break; |
| 280 | used_v_size = total_v_size; |
| 281 | increment = total_v_size >> 2; /* mild exponential growth */ |
| 282 | total_v_size += increment; |
| 283 | if (total_v_size > INT_MAX) { |
| 284 | PyErr_SetString(PyExc_OverflowError, |
| 285 | "line is longer than a Python string can hold"); |
| 286 | Py_DECREF(v); |
| 287 | return NULL; |
| 288 | } |
| 289 | if (_PyString_Resize(&v, total_v_size) < 0) |
| 290 | return NULL; |
| 291 | buf = BUF(v) + used_v_size; |
| 292 | end = BUF(v) + total_v_size; |
| 293 | } |
| 294 | |
| 295 | used_v_size = buf - BUF(v); |
| 296 | if (used_v_size != total_v_size) |
| 297 | _PyString_Resize(&v, used_v_size); |
| 298 | return v; |
| 299 | } |
| 300 | |
| 301 | #ifndef WITH_UNIVERSAL_NEWLINES |
| 302 | #define Util_UnivNewlineRead(a,b,c,d,e) BZ2_bzRead(a,b,c,d) |
| 303 | #else |
| 304 | /* This is a hacked version of Python's |
| 305 | * fileobject.c:Py_UniversalNewlineFread(). */ |
| 306 | size_t |
| 307 | Util_UnivNewlineRead(int *bzerror, BZFILE *stream, |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 308 | char* buf, size_t n, BZ2FileObject *f) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 309 | { |
| 310 | char *dst = buf; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 311 | int newlinetypes, skipnextlf; |
| 312 | |
| 313 | assert(buf != NULL); |
| 314 | assert(stream != NULL); |
| 315 | |
| 316 | if (!f->f_univ_newline) |
| 317 | return BZ2_bzRead(bzerror, stream, buf, n); |
| 318 | |
| 319 | newlinetypes = f->f_newlinetypes; |
| 320 | skipnextlf = f->f_skipnextlf; |
| 321 | |
| 322 | /* Invariant: n is the number of bytes remaining to be filled |
| 323 | * in the buffer. |
| 324 | */ |
| 325 | while (n) { |
| 326 | size_t nread; |
| 327 | int shortread; |
| 328 | char *src = dst; |
| 329 | |
| 330 | nread = BZ2_bzRead(bzerror, stream, dst, n); |
| 331 | assert(nread <= n); |
| 332 | n -= nread; /* assuming 1 byte out for each in; will adjust */ |
| 333 | shortread = n != 0; /* true iff EOF or error */ |
| 334 | while (nread--) { |
| 335 | char c = *src++; |
| 336 | if (c == '\r') { |
| 337 | /* Save as LF and set flag to skip next LF. */ |
| 338 | *dst++ = '\n'; |
| 339 | skipnextlf = 1; |
| 340 | } |
| 341 | else if (skipnextlf && c == '\n') { |
| 342 | /* Skip LF, and remember we saw CR LF. */ |
| 343 | skipnextlf = 0; |
| 344 | newlinetypes |= NEWLINE_CRLF; |
| 345 | ++n; |
| 346 | } |
| 347 | else { |
| 348 | /* Normal char to be stored in buffer. Also |
| 349 | * update the newlinetypes flag if either this |
| 350 | * is an LF or the previous char was a CR. |
| 351 | */ |
| 352 | if (c == '\n') |
| 353 | newlinetypes |= NEWLINE_LF; |
| 354 | else if (skipnextlf) |
| 355 | newlinetypes |= NEWLINE_CR; |
| 356 | *dst++ = c; |
| 357 | skipnextlf = 0; |
| 358 | } |
| 359 | } |
| 360 | if (shortread) { |
| 361 | /* If this is EOF, update type flags. */ |
| 362 | if (skipnextlf && *bzerror == BZ_STREAM_END) |
| 363 | newlinetypes |= NEWLINE_CR; |
| 364 | break; |
| 365 | } |
| 366 | } |
| 367 | f->f_newlinetypes = newlinetypes; |
| 368 | f->f_skipnextlf = skipnextlf; |
| 369 | return dst - buf; |
| 370 | } |
| 371 | #endif |
| 372 | |
| 373 | /* This is a hacked version of Python's fileobject.c:drop_readahead(). */ |
| 374 | static void |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 375 | Util_DropReadAhead(BZ2FileObject *f) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 376 | { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 377 | if (f->f_buf != NULL) { |
| 378 | PyMem_Free(f->f_buf); |
| 379 | f->f_buf = NULL; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /* This is a hacked version of Python's fileobject.c:readahead(). */ |
| 384 | static int |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 385 | Util_ReadAhead(BZ2FileObject *f, int bufsize) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 386 | { |
| 387 | int chunksize; |
| 388 | int bzerror; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 389 | |
| 390 | if (f->f_buf != NULL) { |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 391 | if((f->f_bufend - f->f_bufptr) >= 1) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 392 | return 0; |
| 393 | else |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 394 | Util_DropReadAhead(f); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 395 | } |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 396 | if (f->mode == MODE_READ_EOF) { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 397 | return -1; |
| 398 | } |
| 399 | if ((f->f_buf = PyMem_Malloc(bufsize)) == NULL) { |
| 400 | return -1; |
| 401 | } |
| 402 | Py_BEGIN_ALLOW_THREADS |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 403 | chunksize = Util_UnivNewlineRead(&bzerror, f->fp, f->f_buf, |
| 404 | bufsize, f); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 405 | Py_END_ALLOW_THREADS |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 406 | f->pos += chunksize; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 407 | if (bzerror == BZ_STREAM_END) { |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 408 | f->size = f->pos; |
| 409 | f->mode = MODE_READ_EOF; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 410 | } else if (bzerror != BZ_OK) { |
| 411 | Util_CatchBZ2Error(bzerror); |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 412 | Util_DropReadAhead(f); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 413 | return -1; |
| 414 | } |
| 415 | f->f_bufptr = f->f_buf; |
| 416 | f->f_bufend = f->f_buf + chunksize; |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | /* This is a hacked version of Python's |
| 421 | * fileobject.c:readahead_get_line_skip(). */ |
| 422 | static PyStringObject * |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 423 | Util_ReadAheadGetLineSkip(BZ2FileObject *f, int skip, int bufsize) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 424 | { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 425 | PyStringObject* s; |
| 426 | char *bufptr; |
| 427 | char *buf; |
| 428 | int len; |
| 429 | |
| 430 | if (f->f_buf == NULL) |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 431 | if (Util_ReadAhead(f, bufsize) < 0) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 432 | return NULL; |
| 433 | |
| 434 | len = f->f_bufend - f->f_bufptr; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 435 | if (len == 0) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 436 | return (PyStringObject *) |
| 437 | PyString_FromStringAndSize(NULL, skip); |
| 438 | bufptr = memchr(f->f_bufptr, '\n', len); |
| 439 | if (bufptr != NULL) { |
| 440 | bufptr++; /* Count the '\n' */ |
| 441 | len = bufptr - f->f_bufptr; |
| 442 | s = (PyStringObject *) |
| 443 | PyString_FromStringAndSize(NULL, skip+len); |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 444 | if (s == NULL) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 445 | return NULL; |
| 446 | memcpy(PyString_AS_STRING(s)+skip, f->f_bufptr, len); |
| 447 | f->f_bufptr = bufptr; |
| 448 | if (bufptr == f->f_bufend) |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 449 | Util_DropReadAhead(f); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 450 | } else { |
| 451 | bufptr = f->f_bufptr; |
| 452 | buf = f->f_buf; |
| 453 | f->f_buf = NULL; /* Force new readahead buffer */ |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 454 | s = Util_ReadAheadGetLineSkip(f, skip+len, |
| 455 | bufsize + (bufsize>>2)); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 456 | if (s == NULL) { |
| 457 | PyMem_Free(buf); |
| 458 | return NULL; |
| 459 | } |
| 460 | memcpy(PyString_AS_STRING(s)+skip, bufptr, len); |
| 461 | PyMem_Free(buf); |
| 462 | } |
| 463 | return s; |
| 464 | } |
| 465 | |
| 466 | /* ===================================================================== */ |
| 467 | /* Methods of BZ2File. */ |
| 468 | |
| 469 | PyDoc_STRVAR(BZ2File_read__doc__, |
| 470 | "read([size]) -> string\n\ |
| 471 | \n\ |
| 472 | Read at most size uncompressed bytes, returned as a string. If the size\n\ |
| 473 | argument is negative or omitted, read until EOF is reached.\n\ |
| 474 | "); |
| 475 | |
| 476 | /* This is a hacked version of Python's fileobject.c:file_read(). */ |
| 477 | static PyObject * |
| 478 | BZ2File_read(BZ2FileObject *self, PyObject *args) |
| 479 | { |
| 480 | long bytesrequested = -1; |
| 481 | size_t bytesread, buffersize, chunksize; |
| 482 | int bzerror; |
| 483 | PyObject *ret = NULL; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 484 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 485 | if (!PyArg_ParseTuple(args, "|l:read", &bytesrequested)) |
| 486 | return NULL; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 487 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 488 | ACQUIRE_LOCK(self); |
| 489 | switch (self->mode) { |
| 490 | case MODE_READ: |
| 491 | break; |
| 492 | case MODE_READ_EOF: |
| 493 | ret = PyString_FromString(""); |
| 494 | goto cleanup; |
| 495 | case MODE_CLOSED: |
| 496 | PyErr_SetString(PyExc_ValueError, |
| 497 | "I/O operation on closed file"); |
| 498 | goto cleanup; |
| 499 | default: |
| 500 | PyErr_SetString(PyExc_IOError, |
| 501 | "file is not ready for reading"); |
| 502 | goto cleanup; |
| 503 | } |
| 504 | |
| 505 | if (bytesrequested < 0) |
| 506 | buffersize = Util_NewBufferSize((size_t)0); |
| 507 | else |
| 508 | buffersize = bytesrequested; |
| 509 | if (buffersize > INT_MAX) { |
| 510 | PyErr_SetString(PyExc_OverflowError, |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 511 | "requested number of bytes is " |
| 512 | "more than a Python string can hold"); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 513 | goto cleanup; |
| 514 | } |
| 515 | ret = PyString_FromStringAndSize((char *)NULL, buffersize); |
| 516 | if (ret == NULL) |
| 517 | goto cleanup; |
| 518 | bytesread = 0; |
| 519 | |
| 520 | for (;;) { |
| 521 | Py_BEGIN_ALLOW_THREADS |
| 522 | chunksize = Util_UnivNewlineRead(&bzerror, self->fp, |
| 523 | BUF(ret)+bytesread, |
| 524 | buffersize-bytesread, |
| 525 | self); |
| 526 | self->pos += chunksize; |
| 527 | Py_END_ALLOW_THREADS |
| 528 | bytesread += chunksize; |
| 529 | if (bzerror == BZ_STREAM_END) { |
| 530 | self->size = self->pos; |
| 531 | self->mode = MODE_READ_EOF; |
| 532 | break; |
| 533 | } else if (bzerror != BZ_OK) { |
| 534 | Util_CatchBZ2Error(bzerror); |
| 535 | Py_DECREF(ret); |
| 536 | ret = NULL; |
| 537 | goto cleanup; |
| 538 | } |
| 539 | if (bytesrequested < 0) { |
| 540 | buffersize = Util_NewBufferSize(buffersize); |
| 541 | if (_PyString_Resize(&ret, buffersize) < 0) |
| 542 | goto cleanup; |
| 543 | } else { |
| 544 | break; |
| 545 | } |
| 546 | } |
| 547 | if (bytesread != buffersize) |
| 548 | _PyString_Resize(&ret, bytesread); |
| 549 | |
| 550 | cleanup: |
| 551 | RELEASE_LOCK(self); |
| 552 | return ret; |
| 553 | } |
| 554 | |
| 555 | PyDoc_STRVAR(BZ2File_readline__doc__, |
| 556 | "readline([size]) -> string\n\ |
| 557 | \n\ |
| 558 | Return the next line from the file, as a string, retaining newline.\n\ |
| 559 | A non-negative size argument will limit the maximum number of bytes to\n\ |
| 560 | return (an incomplete line may be returned then). Return an empty\n\ |
| 561 | string at EOF.\n\ |
| 562 | "); |
| 563 | |
| 564 | static PyObject * |
| 565 | BZ2File_readline(BZ2FileObject *self, PyObject *args) |
| 566 | { |
| 567 | PyObject *ret = NULL; |
| 568 | int sizehint = -1; |
| 569 | |
| 570 | if (!PyArg_ParseTuple(args, "|i:readline", &sizehint)) |
| 571 | return NULL; |
| 572 | |
| 573 | ACQUIRE_LOCK(self); |
| 574 | switch (self->mode) { |
| 575 | case MODE_READ: |
| 576 | break; |
| 577 | case MODE_READ_EOF: |
| 578 | ret = PyString_FromString(""); |
| 579 | goto cleanup; |
| 580 | case MODE_CLOSED: |
| 581 | PyErr_SetString(PyExc_ValueError, |
| 582 | "I/O operation on closed file"); |
| 583 | goto cleanup; |
| 584 | default: |
| 585 | PyErr_SetString(PyExc_IOError, |
| 586 | "file is not ready for reading"); |
| 587 | goto cleanup; |
| 588 | } |
| 589 | |
| 590 | if (sizehint == 0) |
| 591 | ret = PyString_FromString(""); |
| 592 | else |
| 593 | ret = Util_GetLine(self, (sizehint < 0) ? 0 : sizehint); |
| 594 | |
| 595 | cleanup: |
| 596 | RELEASE_LOCK(self); |
| 597 | return ret; |
| 598 | } |
| 599 | |
| 600 | PyDoc_STRVAR(BZ2File_readlines__doc__, |
| 601 | "readlines([size]) -> list\n\ |
| 602 | \n\ |
| 603 | Call readline() repeatedly and return a list of lines read.\n\ |
| 604 | The optional size argument, if given, is an approximate bound on the\n\ |
| 605 | total number of bytes in the lines returned.\n\ |
| 606 | "); |
| 607 | |
| 608 | /* This is a hacked version of Python's fileobject.c:file_readlines(). */ |
| 609 | static PyObject * |
| 610 | BZ2File_readlines(BZ2FileObject *self, PyObject *args) |
| 611 | { |
| 612 | long sizehint = 0; |
| 613 | PyObject *list = NULL; |
| 614 | PyObject *line; |
| 615 | char small_buffer[SMALLCHUNK]; |
| 616 | char *buffer = small_buffer; |
| 617 | size_t buffersize = SMALLCHUNK; |
| 618 | PyObject *big_buffer = NULL; |
| 619 | size_t nfilled = 0; |
| 620 | size_t nread; |
| 621 | size_t totalread = 0; |
| 622 | char *p, *q, *end; |
| 623 | int err; |
| 624 | int shortread = 0; |
| 625 | int bzerror; |
| 626 | |
| 627 | if (!PyArg_ParseTuple(args, "|l:readlines", &sizehint)) |
| 628 | return NULL; |
| 629 | |
| 630 | ACQUIRE_LOCK(self); |
| 631 | switch (self->mode) { |
| 632 | case MODE_READ: |
| 633 | break; |
| 634 | case MODE_READ_EOF: |
| 635 | list = PyList_New(0); |
| 636 | goto cleanup; |
| 637 | case MODE_CLOSED: |
| 638 | PyErr_SetString(PyExc_ValueError, |
| 639 | "I/O operation on closed file"); |
| 640 | goto cleanup; |
| 641 | default: |
| 642 | PyErr_SetString(PyExc_IOError, |
| 643 | "file is not ready for reading"); |
| 644 | goto cleanup; |
| 645 | } |
| 646 | |
| 647 | if ((list = PyList_New(0)) == NULL) |
| 648 | goto cleanup; |
| 649 | |
| 650 | for (;;) { |
| 651 | Py_BEGIN_ALLOW_THREADS |
| 652 | nread = Util_UnivNewlineRead(&bzerror, self->fp, |
| 653 | buffer+nfilled, |
| 654 | buffersize-nfilled, self); |
| 655 | self->pos += nread; |
| 656 | Py_END_ALLOW_THREADS |
| 657 | if (bzerror == BZ_STREAM_END) { |
| 658 | self->size = self->pos; |
| 659 | self->mode = MODE_READ_EOF; |
| 660 | if (nread == 0) { |
| 661 | sizehint = 0; |
| 662 | break; |
| 663 | } |
| 664 | shortread = 1; |
| 665 | } else if (bzerror != BZ_OK) { |
| 666 | Util_CatchBZ2Error(bzerror); |
| 667 | error: |
| 668 | Py_DECREF(list); |
| 669 | list = NULL; |
| 670 | goto cleanup; |
| 671 | } |
| 672 | totalread += nread; |
| 673 | p = memchr(buffer+nfilled, '\n', nread); |
| 674 | if (p == NULL) { |
| 675 | /* Need a larger buffer to fit this line */ |
| 676 | nfilled += nread; |
| 677 | buffersize *= 2; |
| 678 | if (buffersize > INT_MAX) { |
| 679 | PyErr_SetString(PyExc_OverflowError, |
| 680 | "line is longer than a Python string can hold"); |
| 681 | goto error; |
| 682 | } |
| 683 | if (big_buffer == NULL) { |
| 684 | /* Create the big buffer */ |
| 685 | big_buffer = PyString_FromStringAndSize( |
| 686 | NULL, buffersize); |
| 687 | if (big_buffer == NULL) |
| 688 | goto error; |
| 689 | buffer = PyString_AS_STRING(big_buffer); |
| 690 | memcpy(buffer, small_buffer, nfilled); |
| 691 | } |
| 692 | else { |
| 693 | /* Grow the big buffer */ |
| 694 | _PyString_Resize(&big_buffer, buffersize); |
| 695 | buffer = PyString_AS_STRING(big_buffer); |
| 696 | } |
| 697 | continue; |
| 698 | } |
| 699 | end = buffer+nfilled+nread; |
| 700 | q = buffer; |
| 701 | do { |
| 702 | /* Process complete lines */ |
| 703 | p++; |
| 704 | line = PyString_FromStringAndSize(q, p-q); |
| 705 | if (line == NULL) |
| 706 | goto error; |
| 707 | err = PyList_Append(list, line); |
| 708 | Py_DECREF(line); |
| 709 | if (err != 0) |
| 710 | goto error; |
| 711 | q = p; |
| 712 | p = memchr(q, '\n', end-q); |
| 713 | } while (p != NULL); |
| 714 | /* Move the remaining incomplete line to the start */ |
| 715 | nfilled = end-q; |
| 716 | memmove(buffer, q, nfilled); |
| 717 | if (sizehint > 0) |
| 718 | if (totalread >= (size_t)sizehint) |
| 719 | break; |
| 720 | if (shortread) { |
| 721 | sizehint = 0; |
| 722 | break; |
| 723 | } |
| 724 | } |
| 725 | if (nfilled != 0) { |
| 726 | /* Partial last line */ |
| 727 | line = PyString_FromStringAndSize(buffer, nfilled); |
| 728 | if (line == NULL) |
| 729 | goto error; |
| 730 | if (sizehint > 0) { |
| 731 | /* Need to complete the last line */ |
| 732 | PyObject *rest = Util_GetLine(self, 0); |
| 733 | if (rest == NULL) { |
| 734 | Py_DECREF(line); |
| 735 | goto error; |
| 736 | } |
| 737 | PyString_Concat(&line, rest); |
| 738 | Py_DECREF(rest); |
| 739 | if (line == NULL) |
| 740 | goto error; |
| 741 | } |
| 742 | err = PyList_Append(list, line); |
| 743 | Py_DECREF(line); |
| 744 | if (err != 0) |
| 745 | goto error; |
| 746 | } |
| 747 | |
| 748 | cleanup: |
| 749 | RELEASE_LOCK(self); |
| 750 | if (big_buffer) { |
| 751 | Py_DECREF(big_buffer); |
| 752 | } |
| 753 | return list; |
| 754 | } |
| 755 | |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 756 | PyDoc_STRVAR(BZ2File_xreadlines__doc__, |
| 757 | "xreadlines() -> self\n\ |
| 758 | \n\ |
| 759 | For backward compatibility. BZ2File objects now include the performance\n\ |
| 760 | optimizations previously implemented in the xreadlines module.\n\ |
| 761 | "); |
| 762 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 763 | PyDoc_STRVAR(BZ2File_write__doc__, |
| 764 | "write(data) -> None\n\ |
| 765 | \n\ |
| 766 | Write the 'data' string to file. Note that due to buffering, close() may\n\ |
| 767 | be needed before the file on disk reflects the data written.\n\ |
| 768 | "); |
| 769 | |
| 770 | /* This is a hacked version of Python's fileobject.c:file_write(). */ |
| 771 | static PyObject * |
| 772 | BZ2File_write(BZ2FileObject *self, PyObject *args) |
| 773 | { |
| 774 | PyObject *ret = NULL; |
| 775 | char *buf; |
| 776 | int len; |
| 777 | int bzerror; |
| 778 | |
| 779 | if (!PyArg_ParseTuple(args, "s#", &buf, &len)) |
| 780 | return NULL; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 781 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 782 | ACQUIRE_LOCK(self); |
| 783 | switch (self->mode) { |
| 784 | case MODE_WRITE: |
| 785 | break; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 786 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 787 | case MODE_CLOSED: |
| 788 | PyErr_SetString(PyExc_ValueError, |
| 789 | "I/O operation on closed file"); |
| 790 | goto cleanup;; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 791 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 792 | default: |
| 793 | PyErr_SetString(PyExc_IOError, |
| 794 | "file is not ready for writing"); |
| 795 | goto cleanup;; |
| 796 | } |
| 797 | |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 798 | self->f_softspace = 0; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 799 | |
| 800 | Py_BEGIN_ALLOW_THREADS |
| 801 | BZ2_bzWrite (&bzerror, self->fp, buf, len); |
| 802 | self->pos += len; |
| 803 | Py_END_ALLOW_THREADS |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 804 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 805 | if (bzerror != BZ_OK) { |
| 806 | Util_CatchBZ2Error(bzerror); |
| 807 | goto cleanup; |
| 808 | } |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 809 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 810 | Py_INCREF(Py_None); |
| 811 | ret = Py_None; |
| 812 | |
| 813 | cleanup: |
| 814 | RELEASE_LOCK(self); |
| 815 | return ret; |
| 816 | } |
| 817 | |
| 818 | PyDoc_STRVAR(BZ2File_writelines__doc__, |
| 819 | "writelines(sequence_of_strings) -> None\n\ |
| 820 | \n\ |
| 821 | Write the sequence of strings to the file. Note that newlines are not\n\ |
| 822 | added. The sequence can be any iterable object producing strings. This is\n\ |
| 823 | equivalent to calling write() for each string.\n\ |
| 824 | "); |
| 825 | |
| 826 | /* This is a hacked version of Python's fileobject.c:file_writelines(). */ |
| 827 | static PyObject * |
| 828 | BZ2File_writelines(BZ2FileObject *self, PyObject *seq) |
| 829 | { |
| 830 | #define CHUNKSIZE 1000 |
| 831 | PyObject *list = NULL; |
| 832 | PyObject *iter = NULL; |
| 833 | PyObject *ret = NULL; |
| 834 | PyObject *line; |
| 835 | int i, j, index, len, islist; |
| 836 | int bzerror; |
| 837 | |
| 838 | ACQUIRE_LOCK(self); |
| 839 | islist = PyList_Check(seq); |
| 840 | if (!islist) { |
| 841 | iter = PyObject_GetIter(seq); |
| 842 | if (iter == NULL) { |
| 843 | PyErr_SetString(PyExc_TypeError, |
| 844 | "writelines() requires an iterable argument"); |
| 845 | goto error; |
| 846 | } |
| 847 | list = PyList_New(CHUNKSIZE); |
| 848 | if (list == NULL) |
| 849 | goto error; |
| 850 | } |
| 851 | |
| 852 | /* Strategy: slurp CHUNKSIZE lines into a private list, |
| 853 | checking that they are all strings, then write that list |
| 854 | without holding the interpreter lock, then come back for more. */ |
| 855 | for (index = 0; ; index += CHUNKSIZE) { |
| 856 | if (islist) { |
| 857 | Py_XDECREF(list); |
| 858 | list = PyList_GetSlice(seq, index, index+CHUNKSIZE); |
| 859 | if (list == NULL) |
| 860 | goto error; |
| 861 | j = PyList_GET_SIZE(list); |
| 862 | } |
| 863 | else { |
| 864 | for (j = 0; j < CHUNKSIZE; j++) { |
| 865 | line = PyIter_Next(iter); |
| 866 | if (line == NULL) { |
| 867 | if (PyErr_Occurred()) |
| 868 | goto error; |
| 869 | break; |
| 870 | } |
| 871 | PyList_SetItem(list, j, line); |
| 872 | } |
| 873 | } |
| 874 | if (j == 0) |
| 875 | break; |
| 876 | |
| 877 | /* Check that all entries are indeed strings. If not, |
| 878 | apply the same rules as for file.write() and |
| 879 | convert the rets to strings. This is slow, but |
| 880 | seems to be the only way since all conversion APIs |
| 881 | could potentially execute Python code. */ |
| 882 | for (i = 0; i < j; i++) { |
| 883 | PyObject *v = PyList_GET_ITEM(list, i); |
| 884 | if (!PyString_Check(v)) { |
| 885 | const char *buffer; |
| 886 | int len; |
| 887 | if (PyObject_AsCharBuffer(v, &buffer, &len)) { |
| 888 | PyErr_SetString(PyExc_TypeError, |
| 889 | "writelines() " |
| 890 | "argument must be " |
| 891 | "a sequence of " |
| 892 | "strings"); |
| 893 | goto error; |
| 894 | } |
| 895 | line = PyString_FromStringAndSize(buffer, |
| 896 | len); |
| 897 | if (line == NULL) |
| 898 | goto error; |
| 899 | Py_DECREF(v); |
| 900 | PyList_SET_ITEM(list, i, line); |
| 901 | } |
| 902 | } |
| 903 | |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 904 | self->f_softspace = 0; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 905 | |
| 906 | /* Since we are releasing the global lock, the |
| 907 | following code may *not* execute Python code. */ |
| 908 | Py_BEGIN_ALLOW_THREADS |
| 909 | for (i = 0; i < j; i++) { |
| 910 | line = PyList_GET_ITEM(list, i); |
| 911 | len = PyString_GET_SIZE(line); |
| 912 | BZ2_bzWrite (&bzerror, self->fp, |
| 913 | PyString_AS_STRING(line), len); |
| 914 | if (bzerror != BZ_OK) { |
| 915 | Py_BLOCK_THREADS |
| 916 | Util_CatchBZ2Error(bzerror); |
| 917 | goto error; |
| 918 | } |
| 919 | } |
| 920 | Py_END_ALLOW_THREADS |
| 921 | |
| 922 | if (j < CHUNKSIZE) |
| 923 | break; |
| 924 | } |
| 925 | |
| 926 | Py_INCREF(Py_None); |
| 927 | ret = Py_None; |
| 928 | |
| 929 | error: |
| 930 | RELEASE_LOCK(self); |
| 931 | Py_XDECREF(list); |
| 932 | Py_XDECREF(iter); |
| 933 | return ret; |
| 934 | #undef CHUNKSIZE |
| 935 | } |
| 936 | |
| 937 | PyDoc_STRVAR(BZ2File_seek__doc__, |
| 938 | "seek(offset [, whence]) -> None\n\ |
| 939 | \n\ |
| 940 | Move to new file position. Argument offset is a byte count. Optional\n\ |
| 941 | argument whence defaults to 0 (offset from start of file, offset\n\ |
| 942 | should be >= 0); other values are 1 (move relative to current position,\n\ |
| 943 | positive or negative), and 2 (move relative to end of file, usually\n\ |
| 944 | negative, although many platforms allow seeking beyond the end of a file).\n\ |
| 945 | \n\ |
| 946 | Note that seeking of bz2 files is emulated, and depending on the parameters\n\ |
| 947 | the operation may be extremely slow.\n\ |
| 948 | "); |
| 949 | |
| 950 | static PyObject * |
| 951 | BZ2File_seek(BZ2FileObject *self, PyObject *args) |
| 952 | { |
| 953 | int where = 0; |
| 954 | long offset; |
| 955 | char small_buffer[SMALLCHUNK]; |
| 956 | char *buffer = small_buffer; |
| 957 | size_t buffersize = SMALLCHUNK; |
| 958 | int bytesread = 0; |
| 959 | int readsize; |
| 960 | int chunksize; |
| 961 | int bzerror; |
| 962 | int rewind = 0; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 963 | PyObject *ret = NULL; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 964 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 965 | if (!PyArg_ParseTuple(args, "l|i:seek", &offset, &where)) |
| 966 | return NULL; |
| 967 | |
| 968 | ACQUIRE_LOCK(self); |
| 969 | Util_DropReadAhead(self); |
| 970 | switch (self->mode) { |
| 971 | case MODE_READ: |
| 972 | case MODE_READ_EOF: |
| 973 | break; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 974 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 975 | case MODE_CLOSED: |
| 976 | PyErr_SetString(PyExc_ValueError, |
| 977 | "I/O operation on closed file"); |
| 978 | goto cleanup;; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 979 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 980 | default: |
| 981 | PyErr_SetString(PyExc_IOError, |
| 982 | "seek works only while reading"); |
| 983 | goto cleanup;; |
| 984 | } |
| 985 | |
| 986 | if (offset < 0) { |
| 987 | if (where == 1) { |
| 988 | offset = self->pos + offset; |
| 989 | rewind = 1; |
| 990 | } else if (where == 2) { |
| 991 | if (self->size == -1) { |
| 992 | assert(self->mode != MODE_READ_EOF); |
| 993 | for (;;) { |
| 994 | Py_BEGIN_ALLOW_THREADS |
| 995 | chunksize = Util_UnivNewlineRead( |
| 996 | &bzerror, self->fp, |
| 997 | buffer, buffersize, |
| 998 | self); |
| 999 | self->pos += chunksize; |
| 1000 | Py_END_ALLOW_THREADS |
| 1001 | |
| 1002 | bytesread += chunksize; |
| 1003 | if (bzerror == BZ_STREAM_END) { |
| 1004 | break; |
| 1005 | } else if (bzerror != BZ_OK) { |
| 1006 | Util_CatchBZ2Error(bzerror); |
| 1007 | goto cleanup; |
| 1008 | } |
| 1009 | } |
| 1010 | self->mode = MODE_READ_EOF; |
| 1011 | self->size = self->pos; |
| 1012 | bytesread = 0; |
| 1013 | } |
| 1014 | offset = self->size + offset; |
| 1015 | if (offset >= self->pos) |
| 1016 | offset -= self->pos; |
| 1017 | else |
| 1018 | rewind = 1; |
| 1019 | } |
| 1020 | if (offset < 0) |
| 1021 | offset = 0; |
| 1022 | } else if (where == 0) { |
| 1023 | if (offset >= self->pos) |
| 1024 | offset -= self->pos; |
| 1025 | else |
| 1026 | rewind = 1; |
| 1027 | } |
| 1028 | |
| 1029 | if (rewind) { |
| 1030 | BZ2_bzReadClose(&bzerror, self->fp); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1031 | if (bzerror != BZ_OK) { |
| 1032 | Util_CatchBZ2Error(bzerror); |
| 1033 | goto cleanup; |
| 1034 | } |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1035 | ret = PyObject_CallMethod(self->file, "seek", "(i)", 0); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1036 | if (!ret) |
| 1037 | goto cleanup; |
| 1038 | Py_DECREF(ret); |
| 1039 | ret = NULL; |
| 1040 | self->pos = 0; |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1041 | self->fp = BZ2_bzReadOpen(&bzerror, PyFile_AsFile(self->file), |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1042 | 0, 0, NULL, 0); |
| 1043 | if (bzerror != BZ_OK) { |
| 1044 | Util_CatchBZ2Error(bzerror); |
| 1045 | goto cleanup; |
| 1046 | } |
| 1047 | self->mode = MODE_READ; |
| 1048 | } else if (self->mode == MODE_READ_EOF) { |
| 1049 | goto exit; |
| 1050 | } |
| 1051 | |
| 1052 | if (offset == 0) |
| 1053 | goto exit; |
| 1054 | |
| 1055 | /* Before getting here, offset must be set to the number of bytes |
| 1056 | * to walk forward. */ |
| 1057 | for (;;) { |
Tim Peters | a17c0c4 | 2002-11-09 04:23:31 +0000 | [diff] [blame] | 1058 | if ((size_t)offset-bytesread > buffersize) |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1059 | readsize = buffersize; |
| 1060 | else |
| 1061 | readsize = offset-bytesread; |
| 1062 | Py_BEGIN_ALLOW_THREADS |
| 1063 | chunksize = Util_UnivNewlineRead(&bzerror, self->fp, |
| 1064 | buffer, readsize, self); |
| 1065 | self->pos += chunksize; |
| 1066 | Py_END_ALLOW_THREADS |
| 1067 | bytesread += chunksize; |
| 1068 | if (bzerror == BZ_STREAM_END) { |
| 1069 | self->size = self->pos; |
| 1070 | self->mode = MODE_READ_EOF; |
| 1071 | break; |
| 1072 | } else if (bzerror != BZ_OK) { |
| 1073 | Util_CatchBZ2Error(bzerror); |
| 1074 | goto cleanup; |
| 1075 | } |
| 1076 | if (bytesread == offset) |
| 1077 | break; |
| 1078 | } |
| 1079 | |
| 1080 | exit: |
| 1081 | Py_INCREF(Py_None); |
| 1082 | ret = Py_None; |
| 1083 | |
| 1084 | cleanup: |
| 1085 | RELEASE_LOCK(self); |
| 1086 | return ret; |
| 1087 | } |
| 1088 | |
| 1089 | PyDoc_STRVAR(BZ2File_tell__doc__, |
| 1090 | "tell() -> int\n\ |
| 1091 | \n\ |
| 1092 | Return the current file position, an integer (may be a long integer).\n\ |
| 1093 | "); |
| 1094 | |
| 1095 | static PyObject * |
| 1096 | BZ2File_tell(BZ2FileObject *self, PyObject *args) |
| 1097 | { |
| 1098 | PyObject *ret = NULL; |
| 1099 | |
| 1100 | if (self->mode == MODE_CLOSED) { |
| 1101 | PyErr_SetString(PyExc_ValueError, |
| 1102 | "I/O operation on closed file"); |
| 1103 | goto cleanup; |
| 1104 | } |
| 1105 | |
| 1106 | ret = PyInt_FromLong(self->pos); |
| 1107 | |
| 1108 | cleanup: |
| 1109 | return ret; |
| 1110 | } |
| 1111 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1112 | PyDoc_STRVAR(BZ2File_close__doc__, |
| 1113 | "close() -> None or (perhaps) an integer\n\ |
| 1114 | \n\ |
| 1115 | Close the file. Sets data attribute .closed to true. A closed file\n\ |
| 1116 | cannot be used for further I/O operations. close() may be called more\n\ |
| 1117 | than once without error.\n\ |
| 1118 | "); |
| 1119 | |
| 1120 | static PyObject * |
| 1121 | BZ2File_close(BZ2FileObject *self) |
| 1122 | { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1123 | PyObject *ret = NULL; |
| 1124 | int bzerror = BZ_OK; |
| 1125 | |
| 1126 | ACQUIRE_LOCK(self); |
| 1127 | switch (self->mode) { |
| 1128 | case MODE_READ: |
| 1129 | case MODE_READ_EOF: |
| 1130 | BZ2_bzReadClose(&bzerror, self->fp); |
| 1131 | break; |
| 1132 | case MODE_WRITE: |
| 1133 | BZ2_bzWriteClose(&bzerror, self->fp, |
| 1134 | 0, NULL, NULL); |
| 1135 | break; |
| 1136 | } |
| 1137 | self->mode = MODE_CLOSED; |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1138 | ret = PyObject_CallMethod(self->file, "close", NULL); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1139 | if (bzerror != BZ_OK) { |
| 1140 | Util_CatchBZ2Error(bzerror); |
| 1141 | Py_XDECREF(ret); |
| 1142 | ret = NULL; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1143 | } |
| 1144 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1145 | RELEASE_LOCK(self); |
| 1146 | return ret; |
| 1147 | } |
| 1148 | |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1149 | static PyObject *BZ2File_getiter(BZ2FileObject *self); |
| 1150 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1151 | static PyMethodDef BZ2File_methods[] = { |
| 1152 | {"read", (PyCFunction)BZ2File_read, METH_VARARGS, BZ2File_read__doc__}, |
| 1153 | {"readline", (PyCFunction)BZ2File_readline, METH_VARARGS, BZ2File_readline__doc__}, |
| 1154 | {"readlines", (PyCFunction)BZ2File_readlines, METH_VARARGS, BZ2File_readlines__doc__}, |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1155 | {"xreadlines", (PyCFunction)BZ2File_getiter, METH_VARARGS, BZ2File_xreadlines__doc__}, |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1156 | {"write", (PyCFunction)BZ2File_write, METH_VARARGS, BZ2File_write__doc__}, |
| 1157 | {"writelines", (PyCFunction)BZ2File_writelines, METH_O, BZ2File_writelines__doc__}, |
| 1158 | {"seek", (PyCFunction)BZ2File_seek, METH_VARARGS, BZ2File_seek__doc__}, |
| 1159 | {"tell", (PyCFunction)BZ2File_tell, METH_NOARGS, BZ2File_tell__doc__}, |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1160 | {"close", (PyCFunction)BZ2File_close, METH_NOARGS, BZ2File_close__doc__}, |
| 1161 | {NULL, NULL} /* sentinel */ |
| 1162 | }; |
| 1163 | |
| 1164 | |
| 1165 | /* ===================================================================== */ |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1166 | /* Getters and setters of BZ2File. */ |
| 1167 | |
| 1168 | #ifdef WITH_UNIVERSAL_NEWLINES |
| 1169 | /* This is a hacked version of Python's fileobject.c:get_newlines(). */ |
| 1170 | static PyObject * |
| 1171 | BZ2File_get_newlines(BZ2FileObject *self, void *closure) |
| 1172 | { |
| 1173 | switch (self->f_newlinetypes) { |
| 1174 | case NEWLINE_UNKNOWN: |
| 1175 | Py_INCREF(Py_None); |
| 1176 | return Py_None; |
| 1177 | case NEWLINE_CR: |
| 1178 | return PyString_FromString("\r"); |
| 1179 | case NEWLINE_LF: |
| 1180 | return PyString_FromString("\n"); |
| 1181 | case NEWLINE_CR|NEWLINE_LF: |
| 1182 | return Py_BuildValue("(ss)", "\r", "\n"); |
| 1183 | case NEWLINE_CRLF: |
| 1184 | return PyString_FromString("\r\n"); |
| 1185 | case NEWLINE_CR|NEWLINE_CRLF: |
| 1186 | return Py_BuildValue("(ss)", "\r", "\r\n"); |
| 1187 | case NEWLINE_LF|NEWLINE_CRLF: |
| 1188 | return Py_BuildValue("(ss)", "\n", "\r\n"); |
| 1189 | case NEWLINE_CR|NEWLINE_LF|NEWLINE_CRLF: |
| 1190 | return Py_BuildValue("(sss)", "\r", "\n", "\r\n"); |
| 1191 | default: |
| 1192 | PyErr_Format(PyExc_SystemError, |
| 1193 | "Unknown newlines value 0x%x\n", |
| 1194 | self->f_newlinetypes); |
| 1195 | return NULL; |
| 1196 | } |
| 1197 | } |
| 1198 | #endif |
| 1199 | |
| 1200 | static PyObject * |
| 1201 | BZ2File_get_closed(BZ2FileObject *self, void *closure) |
| 1202 | { |
| 1203 | return PyInt_FromLong(self->mode == MODE_CLOSED); |
| 1204 | } |
| 1205 | |
| 1206 | static PyObject * |
| 1207 | BZ2File_get_mode(BZ2FileObject *self, void *closure) |
| 1208 | { |
| 1209 | return PyObject_GetAttrString(self->file, "mode"); |
| 1210 | } |
| 1211 | |
| 1212 | static PyObject * |
| 1213 | BZ2File_get_name(BZ2FileObject *self, void *closure) |
| 1214 | { |
| 1215 | return PyObject_GetAttrString(self->file, "name"); |
| 1216 | } |
| 1217 | |
| 1218 | static PyGetSetDef BZ2File_getset[] = { |
| 1219 | {"closed", (getter)BZ2File_get_closed, NULL, |
| 1220 | "True if the file is closed"}, |
| 1221 | #ifdef WITH_UNIVERSAL_NEWLINES |
| 1222 | {"newlines", (getter)BZ2File_get_newlines, NULL, |
| 1223 | "end-of-line convention used in this file"}, |
| 1224 | #endif |
| 1225 | {"mode", (getter)BZ2File_get_mode, NULL, |
| 1226 | "file mode ('r', 'w', or 'U')"}, |
| 1227 | {"name", (getter)BZ2File_get_name, NULL, |
| 1228 | "file name"}, |
| 1229 | {NULL} /* Sentinel */ |
| 1230 | }; |
| 1231 | |
| 1232 | |
| 1233 | /* ===================================================================== */ |
| 1234 | /* Members of BZ2File_Type. */ |
| 1235 | |
| 1236 | #undef OFF |
| 1237 | #define OFF(x) offsetof(BZ2FileObject, x) |
| 1238 | |
| 1239 | static PyMemberDef BZ2File_members[] = { |
| 1240 | {"softspace", T_INT, OFF(f_softspace), 0, |
| 1241 | "flag indicating that a space needs to be printed; used by print"}, |
| 1242 | {NULL} /* Sentinel */ |
| 1243 | }; |
| 1244 | |
| 1245 | /* ===================================================================== */ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1246 | /* Slot definitions for BZ2File_Type. */ |
| 1247 | |
| 1248 | static int |
| 1249 | BZ2File_init(BZ2FileObject *self, PyObject *args, PyObject *kwargs) |
| 1250 | { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1251 | static char *kwlist[] = {"filename", "mode", "buffering", |
| 1252 | "compresslevel", 0}; |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1253 | PyObject *name; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1254 | char *mode = "r"; |
| 1255 | int buffering = -1; |
| 1256 | int compresslevel = 9; |
| 1257 | int bzerror; |
| 1258 | int mode_char = 0; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1259 | |
| 1260 | self->size = -1; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 1261 | |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1262 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|sii:BZ2File", |
| 1263 | kwlist, &name, &mode, &buffering, |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1264 | &compresslevel)) |
| 1265 | return -1; |
| 1266 | |
| 1267 | if (compresslevel < 1 || compresslevel > 9) { |
| 1268 | PyErr_SetString(PyExc_ValueError, |
| 1269 | "compresslevel must be between 1 and 9"); |
| 1270 | return -1; |
| 1271 | } |
| 1272 | |
| 1273 | for (;;) { |
| 1274 | int error = 0; |
| 1275 | switch (*mode) { |
| 1276 | case 'r': |
| 1277 | case 'w': |
| 1278 | if (mode_char) |
| 1279 | error = 1; |
| 1280 | mode_char = *mode; |
| 1281 | break; |
| 1282 | |
| 1283 | case 'b': |
| 1284 | break; |
| 1285 | |
| 1286 | case 'U': |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1287 | self->f_univ_newline = 1; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1288 | break; |
| 1289 | |
| 1290 | default: |
| 1291 | error = 1; |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1292 | break; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1293 | } |
| 1294 | if (error) { |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1295 | PyErr_Format(PyExc_ValueError, |
| 1296 | "invalid mode char %c", *mode); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1297 | return -1; |
| 1298 | } |
| 1299 | mode++; |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1300 | if (*mode == '\0') |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1301 | break; |
| 1302 | } |
| 1303 | |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1304 | mode = (mode_char == 'r') ? "rb" : "wb"; |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 1305 | |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1306 | self->file = PyObject_CallFunction((PyObject*)&PyFile_Type, "(Osi)", |
| 1307 | name, mode, buffering); |
| 1308 | if (self->file == NULL) |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1309 | return -1; |
| 1310 | |
| 1311 | /* From now on, we have stuff to dealloc, so jump to error label |
| 1312 | * instead of returning */ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1313 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1314 | #ifdef WITH_THREAD |
| 1315 | self->lock = PyThread_allocate_lock(); |
| 1316 | if (!self->lock) |
| 1317 | goto error; |
| 1318 | #endif |
| 1319 | |
| 1320 | if (mode_char == 'r') |
| 1321 | self->fp = BZ2_bzReadOpen(&bzerror, |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1322 | PyFile_AsFile(self->file), |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1323 | 0, 0, NULL, 0); |
| 1324 | else |
| 1325 | self->fp = BZ2_bzWriteOpen(&bzerror, |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1326 | PyFile_AsFile(self->file), |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1327 | compresslevel, 0, 0); |
| 1328 | |
| 1329 | if (bzerror != BZ_OK) { |
| 1330 | Util_CatchBZ2Error(bzerror); |
| 1331 | goto error; |
| 1332 | } |
| 1333 | |
| 1334 | self->mode = (mode_char == 'r') ? MODE_READ : MODE_WRITE; |
| 1335 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1336 | return 0; |
| 1337 | |
| 1338 | error: |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1339 | Py_DECREF(self->file); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1340 | #ifdef WITH_THREAD |
| 1341 | if (self->lock) |
| 1342 | PyThread_free_lock(self->lock); |
| 1343 | #endif |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1344 | return -1; |
| 1345 | } |
| 1346 | |
| 1347 | static void |
| 1348 | BZ2File_dealloc(BZ2FileObject *self) |
| 1349 | { |
| 1350 | int bzerror; |
| 1351 | #ifdef WITH_THREAD |
| 1352 | if (self->lock) |
| 1353 | PyThread_free_lock(self->lock); |
| 1354 | #endif |
| 1355 | switch (self->mode) { |
| 1356 | case MODE_READ: |
| 1357 | case MODE_READ_EOF: |
| 1358 | BZ2_bzReadClose(&bzerror, self->fp); |
| 1359 | break; |
| 1360 | case MODE_WRITE: |
| 1361 | BZ2_bzWriteClose(&bzerror, self->fp, |
| 1362 | 0, NULL, NULL); |
| 1363 | break; |
| 1364 | } |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1365 | Util_DropReadAhead(self); |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1366 | Py_DECREF(self->file); |
| 1367 | self->ob_type->tp_free((PyObject *)self); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1368 | } |
| 1369 | |
| 1370 | /* This is a hacked version of Python's fileobject.c:file_getiter(). */ |
| 1371 | static PyObject * |
| 1372 | BZ2File_getiter(BZ2FileObject *self) |
| 1373 | { |
| 1374 | if (self->mode == MODE_CLOSED) { |
| 1375 | PyErr_SetString(PyExc_ValueError, |
| 1376 | "I/O operation on closed file"); |
| 1377 | return NULL; |
| 1378 | } |
| 1379 | Py_INCREF((PyObject*)self); |
| 1380 | return (PyObject *)self; |
| 1381 | } |
| 1382 | |
| 1383 | /* This is a hacked version of Python's fileobject.c:file_iternext(). */ |
| 1384 | #define READAHEAD_BUFSIZE 8192 |
| 1385 | static PyObject * |
| 1386 | BZ2File_iternext(BZ2FileObject *self) |
| 1387 | { |
| 1388 | PyStringObject* ret; |
| 1389 | ACQUIRE_LOCK(self); |
| 1390 | if (self->mode == MODE_CLOSED) { |
| 1391 | PyErr_SetString(PyExc_ValueError, |
| 1392 | "I/O operation on closed file"); |
| 1393 | return NULL; |
| 1394 | } |
| 1395 | ret = Util_ReadAheadGetLineSkip(self, 0, READAHEAD_BUFSIZE); |
| 1396 | RELEASE_LOCK(self); |
| 1397 | if (ret == NULL || PyString_GET_SIZE(ret) == 0) { |
| 1398 | Py_XDECREF(ret); |
| 1399 | return NULL; |
| 1400 | } |
| 1401 | return (PyObject *)ret; |
| 1402 | } |
| 1403 | |
| 1404 | /* ===================================================================== */ |
| 1405 | /* BZ2File_Type definition. */ |
| 1406 | |
| 1407 | PyDoc_VAR(BZ2File__doc__) = |
| 1408 | PyDoc_STR( |
| 1409 | "BZ2File(name [, mode='r', buffering=0, compresslevel=9]) -> file object\n\ |
| 1410 | \n\ |
| 1411 | Open a bz2 file. The mode can be 'r' or 'w', for reading (default) or\n\ |
| 1412 | writing. When opened for writing, the file will be created if it doesn't\n\ |
| 1413 | exist, and truncated otherwise. If the buffering argument is given, 0 means\n\ |
| 1414 | unbuffered, and larger numbers specify the buffer size. If compresslevel\n\ |
| 1415 | is given, must be a number between 1 and 9.\n\ |
| 1416 | ") |
| 1417 | #ifdef WITH_UNIVERSAL_NEWLINES |
| 1418 | PyDoc_STR( |
| 1419 | "\n\ |
| 1420 | Add a 'U' to mode to open the file for input with universal newline\n\ |
| 1421 | support. Any line ending in the input file will be seen as a '\\n' in\n\ |
| 1422 | Python. Also, a file so opened gains the attribute 'newlines'; the value\n\ |
| 1423 | for this attribute is one of None (no newline read yet), '\\r', '\\n',\n\ |
| 1424 | '\\r\\n' or a tuple containing all the newline types seen. Universal\n\ |
| 1425 | newlines are available only when reading.\n\ |
| 1426 | ") |
| 1427 | #endif |
| 1428 | ; |
| 1429 | |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1430 | static PyTypeObject BZ2File_Type = { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1431 | PyObject_HEAD_INIT(NULL) |
| 1432 | 0, /*ob_size*/ |
| 1433 | "bz2.BZ2File", /*tp_name*/ |
| 1434 | sizeof(BZ2FileObject), /*tp_basicsize*/ |
| 1435 | 0, /*tp_itemsize*/ |
| 1436 | (destructor)BZ2File_dealloc, /*tp_dealloc*/ |
| 1437 | 0, /*tp_print*/ |
| 1438 | 0, /*tp_getattr*/ |
| 1439 | 0, /*tp_setattr*/ |
| 1440 | 0, /*tp_compare*/ |
| 1441 | 0, /*tp_repr*/ |
| 1442 | 0, /*tp_as_number*/ |
| 1443 | 0, /*tp_as_sequence*/ |
| 1444 | 0, /*tp_as_mapping*/ |
| 1445 | 0, /*tp_hash*/ |
| 1446 | 0, /*tp_call*/ |
| 1447 | 0, /*tp_str*/ |
Jason Tishler | fb8595d | 2003-01-06 12:41:26 +0000 | [diff] [blame] | 1448 | PyObject_GenericGetAttr,/*tp_getattro*/ |
| 1449 | PyObject_GenericSetAttr,/*tp_setattro*/ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1450 | 0, /*tp_as_buffer*/ |
| 1451 | Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
| 1452 | BZ2File__doc__, /*tp_doc*/ |
| 1453 | 0, /*tp_traverse*/ |
| 1454 | 0, /*tp_clear*/ |
| 1455 | 0, /*tp_richcompare*/ |
| 1456 | 0, /*tp_weaklistoffset*/ |
| 1457 | (getiterfunc)BZ2File_getiter, /*tp_iter*/ |
| 1458 | (iternextfunc)BZ2File_iternext, /*tp_iternext*/ |
| 1459 | BZ2File_methods, /*tp_methods*/ |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1460 | BZ2File_members, /*tp_members*/ |
| 1461 | BZ2File_getset, /*tp_getset*/ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1462 | 0, /*tp_base*/ |
| 1463 | 0, /*tp_dict*/ |
| 1464 | 0, /*tp_descr_get*/ |
| 1465 | 0, /*tp_descr_set*/ |
| 1466 | 0, /*tp_dictoffset*/ |
| 1467 | (initproc)BZ2File_init, /*tp_init*/ |
Jason Tishler | fb8595d | 2003-01-06 12:41:26 +0000 | [diff] [blame] | 1468 | PyType_GenericAlloc, /*tp_alloc*/ |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1469 | PyType_GenericNew, /*tp_new*/ |
Jason Tishler | fb8595d | 2003-01-06 12:41:26 +0000 | [diff] [blame] | 1470 | _PyObject_Del, /*tp_free*/ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1471 | 0, /*tp_is_gc*/ |
| 1472 | }; |
| 1473 | |
| 1474 | |
| 1475 | /* ===================================================================== */ |
| 1476 | /* Methods of BZ2Comp. */ |
| 1477 | |
| 1478 | PyDoc_STRVAR(BZ2Comp_compress__doc__, |
| 1479 | "compress(data) -> string\n\ |
| 1480 | \n\ |
| 1481 | Provide more data to the compressor object. It will return chunks of\n\ |
| 1482 | compressed data whenever possible. When you've finished providing data\n\ |
| 1483 | to compress, call the flush() method to finish the compression process,\n\ |
| 1484 | and return what is left in the internal buffers.\n\ |
| 1485 | "); |
| 1486 | |
| 1487 | static PyObject * |
| 1488 | BZ2Comp_compress(BZ2CompObject *self, PyObject *args) |
| 1489 | { |
| 1490 | char *data; |
| 1491 | int datasize; |
| 1492 | int bufsize = SMALLCHUNK; |
Tim Peters | 07f075c | 2002-11-09 04:26:02 +0000 | [diff] [blame] | 1493 | LONG_LONG totalout; |
Gustavo Niemeyer | 7d7930b | 2002-11-05 18:41:53 +0000 | [diff] [blame] | 1494 | PyObject *ret = NULL; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1495 | bz_stream *bzs = &self->bzs; |
| 1496 | int bzerror; |
| 1497 | |
| 1498 | if (!PyArg_ParseTuple(args, "s#", &data, &datasize)) |
| 1499 | return NULL; |
| 1500 | |
| 1501 | ACQUIRE_LOCK(self); |
| 1502 | if (!self->running) { |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1503 | PyErr_SetString(PyExc_ValueError, |
| 1504 | "this object was already flushed"); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1505 | goto error; |
| 1506 | } |
| 1507 | |
| 1508 | ret = PyString_FromStringAndSize(NULL, bufsize); |
| 1509 | if (!ret) |
| 1510 | goto error; |
| 1511 | |
| 1512 | bzs->next_in = data; |
| 1513 | bzs->avail_in = datasize; |
| 1514 | bzs->next_out = BUF(ret); |
| 1515 | bzs->avail_out = bufsize; |
| 1516 | |
| 1517 | totalout = BZS_TOTAL_OUT(bzs); |
| 1518 | |
| 1519 | for (;;) { |
| 1520 | Py_BEGIN_ALLOW_THREADS |
| 1521 | bzerror = BZ2_bzCompress(bzs, BZ_RUN); |
| 1522 | Py_END_ALLOW_THREADS |
| 1523 | if (bzerror != BZ_RUN_OK) { |
| 1524 | Util_CatchBZ2Error(bzerror); |
| 1525 | goto error; |
| 1526 | } |
| 1527 | if (bzs->avail_out == 0) { |
| 1528 | bufsize = Util_NewBufferSize(bufsize); |
| 1529 | if (_PyString_Resize(&ret, bufsize) < 0) { |
| 1530 | BZ2_bzCompressEnd(bzs); |
| 1531 | goto error; |
| 1532 | } |
| 1533 | bzs->next_out = BUF(ret) + (BZS_TOTAL_OUT(bzs) |
| 1534 | - totalout); |
| 1535 | bzs->avail_out = bufsize - (bzs->next_out - BUF(ret)); |
| 1536 | } else if (bzs->avail_in == 0) { |
| 1537 | break; |
| 1538 | } |
| 1539 | } |
| 1540 | |
Tim Peters | f29f0c6 | 2002-11-09 04:28:17 +0000 | [diff] [blame] | 1541 | _PyString_Resize(&ret, (int)(BZS_TOTAL_OUT(bzs) - totalout)); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1542 | |
| 1543 | RELEASE_LOCK(self); |
| 1544 | return ret; |
| 1545 | |
| 1546 | error: |
| 1547 | RELEASE_LOCK(self); |
| 1548 | Py_XDECREF(ret); |
| 1549 | return NULL; |
| 1550 | } |
| 1551 | |
| 1552 | PyDoc_STRVAR(BZ2Comp_flush__doc__, |
| 1553 | "flush() -> string\n\ |
| 1554 | \n\ |
| 1555 | Finish the compression process and return what is left in internal buffers.\n\ |
| 1556 | You must not use the compressor object after calling this method.\n\ |
| 1557 | "); |
| 1558 | |
| 1559 | static PyObject * |
| 1560 | BZ2Comp_flush(BZ2CompObject *self) |
| 1561 | { |
| 1562 | int bufsize = SMALLCHUNK; |
Gustavo Niemeyer | 7d7930b | 2002-11-05 18:41:53 +0000 | [diff] [blame] | 1563 | PyObject *ret = NULL; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1564 | bz_stream *bzs = &self->bzs; |
Tim Peters | 2858e5e | 2002-11-09 04:30:08 +0000 | [diff] [blame] | 1565 | LONG_LONG totalout; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1566 | int bzerror; |
| 1567 | |
| 1568 | ACQUIRE_LOCK(self); |
| 1569 | if (!self->running) { |
| 1570 | PyErr_SetString(PyExc_ValueError, "object was already " |
| 1571 | "flushed"); |
| 1572 | goto error; |
| 1573 | } |
| 1574 | self->running = 0; |
| 1575 | |
| 1576 | ret = PyString_FromStringAndSize(NULL, bufsize); |
| 1577 | if (!ret) |
| 1578 | goto error; |
| 1579 | |
| 1580 | bzs->next_out = BUF(ret); |
| 1581 | bzs->avail_out = bufsize; |
| 1582 | |
| 1583 | totalout = BZS_TOTAL_OUT(bzs); |
| 1584 | |
| 1585 | for (;;) { |
| 1586 | Py_BEGIN_ALLOW_THREADS |
| 1587 | bzerror = BZ2_bzCompress(bzs, BZ_FINISH); |
| 1588 | Py_END_ALLOW_THREADS |
| 1589 | if (bzerror == BZ_STREAM_END) { |
| 1590 | break; |
| 1591 | } else if (bzerror != BZ_FINISH_OK) { |
| 1592 | Util_CatchBZ2Error(bzerror); |
| 1593 | goto error; |
| 1594 | } |
| 1595 | if (bzs->avail_out == 0) { |
| 1596 | bufsize = Util_NewBufferSize(bufsize); |
| 1597 | if (_PyString_Resize(&ret, bufsize) < 0) |
| 1598 | goto error; |
| 1599 | bzs->next_out = BUF(ret); |
| 1600 | bzs->next_out = BUF(ret) + (BZS_TOTAL_OUT(bzs) |
| 1601 | - totalout); |
| 1602 | bzs->avail_out = bufsize - (bzs->next_out - BUF(ret)); |
| 1603 | } |
| 1604 | } |
| 1605 | |
| 1606 | if (bzs->avail_out != 0) |
Tim Peters | 2858e5e | 2002-11-09 04:30:08 +0000 | [diff] [blame] | 1607 | _PyString_Resize(&ret, (int)(BZS_TOTAL_OUT(bzs) - totalout)); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1608 | |
| 1609 | RELEASE_LOCK(self); |
| 1610 | return ret; |
| 1611 | |
| 1612 | error: |
| 1613 | RELEASE_LOCK(self); |
| 1614 | Py_XDECREF(ret); |
| 1615 | return NULL; |
| 1616 | } |
| 1617 | |
| 1618 | static PyMethodDef BZ2Comp_methods[] = { |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1619 | {"compress", (PyCFunction)BZ2Comp_compress, METH_VARARGS, |
| 1620 | BZ2Comp_compress__doc__}, |
| 1621 | {"flush", (PyCFunction)BZ2Comp_flush, METH_NOARGS, |
| 1622 | BZ2Comp_flush__doc__}, |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1623 | {NULL, NULL} /* sentinel */ |
| 1624 | }; |
| 1625 | |
| 1626 | |
| 1627 | /* ===================================================================== */ |
| 1628 | /* Slot definitions for BZ2Comp_Type. */ |
| 1629 | |
| 1630 | static int |
| 1631 | BZ2Comp_init(BZ2CompObject *self, PyObject *args, PyObject *kwargs) |
| 1632 | { |
| 1633 | int compresslevel = 9; |
| 1634 | int bzerror; |
| 1635 | static char *kwlist[] = {"compresslevel", 0}; |
| 1636 | |
| 1637 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i:BZ2Compressor", |
| 1638 | kwlist, &compresslevel)) |
| 1639 | return -1; |
| 1640 | |
| 1641 | if (compresslevel < 1 || compresslevel > 9) { |
| 1642 | PyErr_SetString(PyExc_ValueError, |
| 1643 | "compresslevel must be between 1 and 9"); |
| 1644 | goto error; |
| 1645 | } |
| 1646 | |
| 1647 | #ifdef WITH_THREAD |
| 1648 | self->lock = PyThread_allocate_lock(); |
| 1649 | if (!self->lock) |
| 1650 | goto error; |
| 1651 | #endif |
| 1652 | |
| 1653 | memset(&self->bzs, 0, sizeof(bz_stream)); |
| 1654 | bzerror = BZ2_bzCompressInit(&self->bzs, compresslevel, 0, 0); |
| 1655 | if (bzerror != BZ_OK) { |
| 1656 | Util_CatchBZ2Error(bzerror); |
| 1657 | goto error; |
| 1658 | } |
| 1659 | |
| 1660 | self->running = 1; |
| 1661 | |
| 1662 | return 0; |
| 1663 | error: |
| 1664 | #ifdef WITH_THREAD |
| 1665 | if (self->lock) |
| 1666 | PyThread_free_lock(self->lock); |
| 1667 | #endif |
| 1668 | return -1; |
| 1669 | } |
| 1670 | |
| 1671 | static void |
| 1672 | BZ2Comp_dealloc(BZ2CompObject *self) |
| 1673 | { |
| 1674 | #ifdef WITH_THREAD |
| 1675 | if (self->lock) |
| 1676 | PyThread_free_lock(self->lock); |
| 1677 | #endif |
| 1678 | BZ2_bzCompressEnd(&self->bzs); |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1679 | self->ob_type->tp_free((PyObject *)self); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1680 | } |
| 1681 | |
| 1682 | |
| 1683 | /* ===================================================================== */ |
| 1684 | /* BZ2Comp_Type definition. */ |
| 1685 | |
| 1686 | PyDoc_STRVAR(BZ2Comp__doc__, |
| 1687 | "BZ2Compressor([compresslevel=9]) -> compressor object\n\ |
| 1688 | \n\ |
| 1689 | Create a new compressor object. This object may be used to compress\n\ |
| 1690 | data sequentially. If you want to compress data in one shot, use the\n\ |
| 1691 | compress() function instead. The compresslevel parameter, if given,\n\ |
| 1692 | must be a number between 1 and 9.\n\ |
| 1693 | "); |
| 1694 | |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1695 | static PyTypeObject BZ2Comp_Type = { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1696 | PyObject_HEAD_INIT(NULL) |
| 1697 | 0, /*ob_size*/ |
| 1698 | "bz2.BZ2Compressor", /*tp_name*/ |
| 1699 | sizeof(BZ2CompObject), /*tp_basicsize*/ |
| 1700 | 0, /*tp_itemsize*/ |
| 1701 | (destructor)BZ2Comp_dealloc, /*tp_dealloc*/ |
| 1702 | 0, /*tp_print*/ |
| 1703 | 0, /*tp_getattr*/ |
| 1704 | 0, /*tp_setattr*/ |
| 1705 | 0, /*tp_compare*/ |
| 1706 | 0, /*tp_repr*/ |
| 1707 | 0, /*tp_as_number*/ |
| 1708 | 0, /*tp_as_sequence*/ |
| 1709 | 0, /*tp_as_mapping*/ |
| 1710 | 0, /*tp_hash*/ |
| 1711 | 0, /*tp_call*/ |
| 1712 | 0, /*tp_str*/ |
Jason Tishler | fb8595d | 2003-01-06 12:41:26 +0000 | [diff] [blame] | 1713 | PyObject_GenericGetAttr,/*tp_getattro*/ |
| 1714 | PyObject_GenericSetAttr,/*tp_setattro*/ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1715 | 0, /*tp_as_buffer*/ |
| 1716 | Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
| 1717 | BZ2Comp__doc__, /*tp_doc*/ |
| 1718 | 0, /*tp_traverse*/ |
| 1719 | 0, /*tp_clear*/ |
| 1720 | 0, /*tp_richcompare*/ |
| 1721 | 0, /*tp_weaklistoffset*/ |
| 1722 | 0, /*tp_iter*/ |
| 1723 | 0, /*tp_iternext*/ |
| 1724 | BZ2Comp_methods, /*tp_methods*/ |
| 1725 | 0, /*tp_members*/ |
| 1726 | 0, /*tp_getset*/ |
| 1727 | 0, /*tp_base*/ |
| 1728 | 0, /*tp_dict*/ |
| 1729 | 0, /*tp_descr_get*/ |
| 1730 | 0, /*tp_descr_set*/ |
| 1731 | 0, /*tp_dictoffset*/ |
| 1732 | (initproc)BZ2Comp_init, /*tp_init*/ |
Jason Tishler | fb8595d | 2003-01-06 12:41:26 +0000 | [diff] [blame] | 1733 | PyType_GenericAlloc, /*tp_alloc*/ |
| 1734 | PyType_GenericNew, /*tp_new*/ |
| 1735 | _PyObject_Del, /*tp_free*/ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1736 | 0, /*tp_is_gc*/ |
| 1737 | }; |
| 1738 | |
| 1739 | |
| 1740 | /* ===================================================================== */ |
| 1741 | /* Members of BZ2Decomp. */ |
| 1742 | |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1743 | #undef OFF |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1744 | #define OFF(x) offsetof(BZ2DecompObject, x) |
| 1745 | |
| 1746 | static PyMemberDef BZ2Decomp_members[] = { |
| 1747 | {"unused_data", T_OBJECT, OFF(unused_data), RO}, |
| 1748 | {NULL} /* Sentinel */ |
| 1749 | }; |
| 1750 | |
| 1751 | |
| 1752 | /* ===================================================================== */ |
| 1753 | /* Methods of BZ2Decomp. */ |
| 1754 | |
| 1755 | PyDoc_STRVAR(BZ2Decomp_decompress__doc__, |
| 1756 | "decompress(data) -> string\n\ |
| 1757 | \n\ |
| 1758 | Provide more data to the decompressor object. It will return chunks\n\ |
| 1759 | of decompressed data whenever possible. If you try to decompress data\n\ |
| 1760 | after the end of stream is found, EOFError will be raised. If any data\n\ |
| 1761 | was found after the end of stream, it'll be ignored and saved in\n\ |
| 1762 | unused_data attribute.\n\ |
| 1763 | "); |
| 1764 | |
| 1765 | static PyObject * |
| 1766 | BZ2Decomp_decompress(BZ2DecompObject *self, PyObject *args) |
| 1767 | { |
| 1768 | char *data; |
| 1769 | int datasize; |
| 1770 | int bufsize = SMALLCHUNK; |
Tim Peters | 39185d6 | 2002-11-09 04:31:38 +0000 | [diff] [blame] | 1771 | LONG_LONG totalout; |
Neal Norwitz | 18142c0 | 2002-11-05 18:17:32 +0000 | [diff] [blame] | 1772 | PyObject *ret = NULL; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1773 | bz_stream *bzs = &self->bzs; |
| 1774 | int bzerror; |
| 1775 | |
| 1776 | if (!PyArg_ParseTuple(args, "s#", &data, &datasize)) |
| 1777 | return NULL; |
| 1778 | |
| 1779 | ACQUIRE_LOCK(self); |
| 1780 | if (!self->running) { |
| 1781 | PyErr_SetString(PyExc_EOFError, "end of stream was " |
| 1782 | "already found"); |
| 1783 | goto error; |
| 1784 | } |
| 1785 | |
| 1786 | ret = PyString_FromStringAndSize(NULL, bufsize); |
| 1787 | if (!ret) |
| 1788 | goto error; |
| 1789 | |
| 1790 | bzs->next_in = data; |
| 1791 | bzs->avail_in = datasize; |
| 1792 | bzs->next_out = BUF(ret); |
| 1793 | bzs->avail_out = bufsize; |
| 1794 | |
| 1795 | totalout = BZS_TOTAL_OUT(bzs); |
| 1796 | |
| 1797 | for (;;) { |
| 1798 | Py_BEGIN_ALLOW_THREADS |
| 1799 | bzerror = BZ2_bzDecompress(bzs); |
| 1800 | Py_END_ALLOW_THREADS |
| 1801 | if (bzerror == BZ_STREAM_END) { |
| 1802 | if (bzs->avail_in != 0) { |
| 1803 | Py_DECREF(self->unused_data); |
| 1804 | self->unused_data = |
| 1805 | PyString_FromStringAndSize(bzs->next_in, |
| 1806 | bzs->avail_in); |
| 1807 | } |
| 1808 | self->running = 0; |
| 1809 | break; |
| 1810 | } |
| 1811 | if (bzerror != BZ_OK) { |
| 1812 | Util_CatchBZ2Error(bzerror); |
| 1813 | goto error; |
| 1814 | } |
| 1815 | if (bzs->avail_out == 0) { |
| 1816 | bufsize = Util_NewBufferSize(bufsize); |
| 1817 | if (_PyString_Resize(&ret, bufsize) < 0) { |
| 1818 | BZ2_bzDecompressEnd(bzs); |
| 1819 | goto error; |
| 1820 | } |
| 1821 | bzs->next_out = BUF(ret); |
| 1822 | bzs->next_out = BUF(ret) + (BZS_TOTAL_OUT(bzs) |
| 1823 | - totalout); |
| 1824 | bzs->avail_out = bufsize - (bzs->next_out - BUF(ret)); |
| 1825 | } else if (bzs->avail_in == 0) { |
| 1826 | break; |
| 1827 | } |
| 1828 | } |
| 1829 | |
| 1830 | if (bzs->avail_out != 0) |
Tim Peters | 39185d6 | 2002-11-09 04:31:38 +0000 | [diff] [blame] | 1831 | _PyString_Resize(&ret, (int)(BZS_TOTAL_OUT(bzs) - totalout)); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1832 | |
| 1833 | RELEASE_LOCK(self); |
| 1834 | return ret; |
| 1835 | |
| 1836 | error: |
| 1837 | RELEASE_LOCK(self); |
| 1838 | Py_XDECREF(ret); |
| 1839 | return NULL; |
| 1840 | } |
| 1841 | |
| 1842 | static PyMethodDef BZ2Decomp_methods[] = { |
| 1843 | {"decompress", (PyCFunction)BZ2Decomp_decompress, METH_VARARGS, BZ2Decomp_decompress__doc__}, |
| 1844 | {NULL, NULL} /* sentinel */ |
| 1845 | }; |
| 1846 | |
| 1847 | |
| 1848 | /* ===================================================================== */ |
| 1849 | /* Slot definitions for BZ2Decomp_Type. */ |
| 1850 | |
| 1851 | static int |
| 1852 | BZ2Decomp_init(BZ2DecompObject *self, PyObject *args, PyObject *kwargs) |
| 1853 | { |
| 1854 | int bzerror; |
| 1855 | |
| 1856 | if (!PyArg_ParseTuple(args, ":BZ2Decompressor")) |
| 1857 | return -1; |
| 1858 | |
| 1859 | #ifdef WITH_THREAD |
| 1860 | self->lock = PyThread_allocate_lock(); |
| 1861 | if (!self->lock) |
| 1862 | goto error; |
| 1863 | #endif |
| 1864 | |
| 1865 | self->unused_data = PyString_FromString(""); |
| 1866 | if (!self->unused_data) |
| 1867 | goto error; |
| 1868 | |
| 1869 | memset(&self->bzs, 0, sizeof(bz_stream)); |
| 1870 | bzerror = BZ2_bzDecompressInit(&self->bzs, 0, 0); |
| 1871 | if (bzerror != BZ_OK) { |
| 1872 | Util_CatchBZ2Error(bzerror); |
| 1873 | goto error; |
| 1874 | } |
| 1875 | |
| 1876 | self->running = 1; |
| 1877 | |
| 1878 | return 0; |
| 1879 | |
| 1880 | error: |
| 1881 | #ifdef WITH_THREAD |
| 1882 | if (self->lock) |
| 1883 | PyThread_free_lock(self->lock); |
| 1884 | #endif |
| 1885 | Py_XDECREF(self->unused_data); |
| 1886 | return -1; |
| 1887 | } |
| 1888 | |
| 1889 | static void |
| 1890 | BZ2Decomp_dealloc(BZ2DecompObject *self) |
| 1891 | { |
| 1892 | #ifdef WITH_THREAD |
| 1893 | if (self->lock) |
| 1894 | PyThread_free_lock(self->lock); |
| 1895 | #endif |
| 1896 | Py_XDECREF(self->unused_data); |
| 1897 | BZ2_bzDecompressEnd(&self->bzs); |
Gustavo Niemeyer | a33d0aa | 2003-02-11 18:46:20 +0000 | [diff] [blame^] | 1898 | self->ob_type->tp_free((PyObject *)self); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1899 | } |
| 1900 | |
| 1901 | |
| 1902 | /* ===================================================================== */ |
| 1903 | /* BZ2Decomp_Type definition. */ |
| 1904 | |
| 1905 | PyDoc_STRVAR(BZ2Decomp__doc__, |
| 1906 | "BZ2Decompressor() -> decompressor object\n\ |
| 1907 | \n\ |
| 1908 | Create a new decompressor object. This object may be used to decompress\n\ |
| 1909 | data sequentially. If you want to decompress data in one shot, use the\n\ |
| 1910 | decompress() function instead.\n\ |
| 1911 | "); |
| 1912 | |
Gustavo Niemeyer | 49ea7be | 2002-11-08 14:31:49 +0000 | [diff] [blame] | 1913 | static PyTypeObject BZ2Decomp_Type = { |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1914 | PyObject_HEAD_INIT(NULL) |
| 1915 | 0, /*ob_size*/ |
| 1916 | "bz2.BZ2Decompressor", /*tp_name*/ |
| 1917 | sizeof(BZ2DecompObject), /*tp_basicsize*/ |
| 1918 | 0, /*tp_itemsize*/ |
| 1919 | (destructor)BZ2Decomp_dealloc, /*tp_dealloc*/ |
| 1920 | 0, /*tp_print*/ |
| 1921 | 0, /*tp_getattr*/ |
| 1922 | 0, /*tp_setattr*/ |
| 1923 | 0, /*tp_compare*/ |
| 1924 | 0, /*tp_repr*/ |
| 1925 | 0, /*tp_as_number*/ |
| 1926 | 0, /*tp_as_sequence*/ |
| 1927 | 0, /*tp_as_mapping*/ |
| 1928 | 0, /*tp_hash*/ |
| 1929 | 0, /*tp_call*/ |
| 1930 | 0, /*tp_str*/ |
Jason Tishler | fb8595d | 2003-01-06 12:41:26 +0000 | [diff] [blame] | 1931 | PyObject_GenericGetAttr,/*tp_getattro*/ |
| 1932 | PyObject_GenericSetAttr,/*tp_setattro*/ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1933 | 0, /*tp_as_buffer*/ |
| 1934 | Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
| 1935 | BZ2Decomp__doc__, /*tp_doc*/ |
| 1936 | 0, /*tp_traverse*/ |
| 1937 | 0, /*tp_clear*/ |
| 1938 | 0, /*tp_richcompare*/ |
| 1939 | 0, /*tp_weaklistoffset*/ |
| 1940 | 0, /*tp_iter*/ |
| 1941 | 0, /*tp_iternext*/ |
| 1942 | BZ2Decomp_methods, /*tp_methods*/ |
| 1943 | BZ2Decomp_members, /*tp_members*/ |
| 1944 | 0, /*tp_getset*/ |
| 1945 | 0, /*tp_base*/ |
| 1946 | 0, /*tp_dict*/ |
| 1947 | 0, /*tp_descr_get*/ |
| 1948 | 0, /*tp_descr_set*/ |
| 1949 | 0, /*tp_dictoffset*/ |
| 1950 | (initproc)BZ2Decomp_init, /*tp_init*/ |
Jason Tishler | fb8595d | 2003-01-06 12:41:26 +0000 | [diff] [blame] | 1951 | PyType_GenericAlloc, /*tp_alloc*/ |
| 1952 | PyType_GenericNew, /*tp_new*/ |
| 1953 | _PyObject_Del, /*tp_free*/ |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1954 | 0, /*tp_is_gc*/ |
| 1955 | }; |
| 1956 | |
| 1957 | |
| 1958 | /* ===================================================================== */ |
| 1959 | /* Module functions. */ |
| 1960 | |
| 1961 | PyDoc_STRVAR(bz2_compress__doc__, |
| 1962 | "compress(data [, compresslevel=9]) -> string\n\ |
| 1963 | \n\ |
| 1964 | Compress data in one shot. If you want to compress data sequentially,\n\ |
| 1965 | use an instance of BZ2Compressor instead. The compresslevel parameter, if\n\ |
| 1966 | given, must be a number between 1 and 9.\n\ |
| 1967 | "); |
| 1968 | |
| 1969 | static PyObject * |
| 1970 | bz2_compress(PyObject *self, PyObject *args, PyObject *kwargs) |
| 1971 | { |
| 1972 | int compresslevel=9; |
| 1973 | char *data; |
| 1974 | int datasize; |
| 1975 | int bufsize; |
Gustavo Niemeyer | 7d7930b | 2002-11-05 18:41:53 +0000 | [diff] [blame] | 1976 | PyObject *ret = NULL; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 1977 | bz_stream _bzs; |
| 1978 | bz_stream *bzs = &_bzs; |
| 1979 | int bzerror; |
| 1980 | static char *kwlist[] = {"data", "compresslevel", 0}; |
| 1981 | |
| 1982 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|i", |
| 1983 | kwlist, &data, &datasize, |
| 1984 | &compresslevel)) |
| 1985 | return NULL; |
| 1986 | |
| 1987 | if (compresslevel < 1 || compresslevel > 9) { |
| 1988 | PyErr_SetString(PyExc_ValueError, |
| 1989 | "compresslevel must be between 1 and 9"); |
| 1990 | return NULL; |
| 1991 | } |
| 1992 | |
| 1993 | /* Conforming to bz2 manual, this is large enough to fit compressed |
| 1994 | * data in one shot. We will check it later anyway. */ |
| 1995 | bufsize = datasize + (datasize/100+1) + 600; |
| 1996 | |
| 1997 | ret = PyString_FromStringAndSize(NULL, bufsize); |
| 1998 | if (!ret) |
| 1999 | return NULL; |
| 2000 | |
| 2001 | memset(bzs, 0, sizeof(bz_stream)); |
| 2002 | |
| 2003 | bzs->next_in = data; |
| 2004 | bzs->avail_in = datasize; |
| 2005 | bzs->next_out = BUF(ret); |
| 2006 | bzs->avail_out = bufsize; |
| 2007 | |
| 2008 | bzerror = BZ2_bzCompressInit(bzs, compresslevel, 0, 0); |
| 2009 | if (bzerror != BZ_OK) { |
| 2010 | Util_CatchBZ2Error(bzerror); |
| 2011 | Py_DECREF(ret); |
| 2012 | return NULL; |
| 2013 | } |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 2014 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 2015 | for (;;) { |
| 2016 | Py_BEGIN_ALLOW_THREADS |
| 2017 | bzerror = BZ2_bzCompress(bzs, BZ_FINISH); |
| 2018 | Py_END_ALLOW_THREADS |
| 2019 | if (bzerror == BZ_STREAM_END) { |
| 2020 | break; |
| 2021 | } else if (bzerror != BZ_FINISH_OK) { |
| 2022 | BZ2_bzCompressEnd(bzs); |
| 2023 | Util_CatchBZ2Error(bzerror); |
| 2024 | Py_DECREF(ret); |
| 2025 | return NULL; |
| 2026 | } |
| 2027 | if (bzs->avail_out == 0) { |
| 2028 | bufsize = Util_NewBufferSize(bufsize); |
| 2029 | if (_PyString_Resize(&ret, bufsize) < 0) { |
| 2030 | BZ2_bzCompressEnd(bzs); |
| 2031 | Py_DECREF(ret); |
| 2032 | return NULL; |
| 2033 | } |
| 2034 | bzs->next_out = BUF(ret) + BZS_TOTAL_OUT(bzs); |
| 2035 | bzs->avail_out = bufsize - (bzs->next_out - BUF(ret)); |
| 2036 | } |
| 2037 | } |
| 2038 | |
| 2039 | if (bzs->avail_out != 0) |
Tim Peters | 6ee6db8 | 2002-11-09 04:33:36 +0000 | [diff] [blame] | 2040 | _PyString_Resize(&ret, (int)BZS_TOTAL_OUT(bzs)); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 2041 | BZ2_bzCompressEnd(bzs); |
| 2042 | |
| 2043 | return ret; |
| 2044 | } |
| 2045 | |
| 2046 | PyDoc_STRVAR(bz2_decompress__doc__, |
| 2047 | "decompress(data) -> decompressed data\n\ |
| 2048 | \n\ |
| 2049 | Decompress data in one shot. If you want to decompress data sequentially,\n\ |
| 2050 | use an instance of BZ2Decompressor instead.\n\ |
| 2051 | "); |
| 2052 | |
| 2053 | static PyObject * |
| 2054 | bz2_decompress(PyObject *self, PyObject *args) |
| 2055 | { |
| 2056 | char *data; |
| 2057 | int datasize; |
| 2058 | int bufsize = SMALLCHUNK; |
| 2059 | PyObject *ret; |
| 2060 | bz_stream _bzs; |
| 2061 | bz_stream *bzs = &_bzs; |
| 2062 | int bzerror; |
| 2063 | |
| 2064 | if (!PyArg_ParseTuple(args, "s#", &data, &datasize)) |
| 2065 | return NULL; |
| 2066 | |
| 2067 | if (datasize == 0) |
| 2068 | return PyString_FromString(""); |
| 2069 | |
| 2070 | ret = PyString_FromStringAndSize(NULL, bufsize); |
| 2071 | if (!ret) |
| 2072 | return NULL; |
| 2073 | |
| 2074 | memset(bzs, 0, sizeof(bz_stream)); |
| 2075 | |
| 2076 | bzs->next_in = data; |
| 2077 | bzs->avail_in = datasize; |
| 2078 | bzs->next_out = BUF(ret); |
| 2079 | bzs->avail_out = bufsize; |
| 2080 | |
| 2081 | bzerror = BZ2_bzDecompressInit(bzs, 0, 0); |
| 2082 | if (bzerror != BZ_OK) { |
| 2083 | Util_CatchBZ2Error(bzerror); |
| 2084 | Py_DECREF(ret); |
| 2085 | return NULL; |
| 2086 | } |
Tim Peters | e322809 | 2002-11-09 04:21:44 +0000 | [diff] [blame] | 2087 | |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 2088 | for (;;) { |
| 2089 | Py_BEGIN_ALLOW_THREADS |
| 2090 | bzerror = BZ2_bzDecompress(bzs); |
| 2091 | Py_END_ALLOW_THREADS |
| 2092 | if (bzerror == BZ_STREAM_END) { |
| 2093 | break; |
| 2094 | } else if (bzerror != BZ_OK) { |
| 2095 | BZ2_bzDecompressEnd(bzs); |
| 2096 | Util_CatchBZ2Error(bzerror); |
| 2097 | Py_DECREF(ret); |
| 2098 | return NULL; |
| 2099 | } |
| 2100 | if (bzs->avail_out == 0) { |
| 2101 | bufsize = Util_NewBufferSize(bufsize); |
| 2102 | if (_PyString_Resize(&ret, bufsize) < 0) { |
| 2103 | BZ2_bzDecompressEnd(bzs); |
| 2104 | Py_DECREF(ret); |
| 2105 | return NULL; |
| 2106 | } |
| 2107 | bzs->next_out = BUF(ret) + BZS_TOTAL_OUT(bzs); |
| 2108 | bzs->avail_out = bufsize - (bzs->next_out - BUF(ret)); |
| 2109 | } else if (bzs->avail_in == 0) { |
| 2110 | BZ2_bzDecompressEnd(bzs); |
| 2111 | PyErr_SetString(PyExc_ValueError, |
| 2112 | "couldn't find end of stream"); |
| 2113 | Py_DECREF(ret); |
| 2114 | return NULL; |
| 2115 | } |
| 2116 | } |
| 2117 | |
| 2118 | if (bzs->avail_out != 0) |
Tim Peters | 6ee6db8 | 2002-11-09 04:33:36 +0000 | [diff] [blame] | 2119 | _PyString_Resize(&ret, (int)BZS_TOTAL_OUT(bzs)); |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 2120 | BZ2_bzDecompressEnd(bzs); |
| 2121 | |
| 2122 | return ret; |
| 2123 | } |
| 2124 | |
| 2125 | static PyMethodDef bz2_methods[] = { |
| 2126 | {"compress", (PyCFunction) bz2_compress, METH_VARARGS|METH_KEYWORDS, |
| 2127 | bz2_compress__doc__}, |
| 2128 | {"decompress", (PyCFunction) bz2_decompress, METH_VARARGS, |
| 2129 | bz2_decompress__doc__}, |
| 2130 | {NULL, NULL} /* sentinel */ |
| 2131 | }; |
| 2132 | |
| 2133 | /* ===================================================================== */ |
| 2134 | /* Initialization function. */ |
| 2135 | |
| 2136 | PyDoc_STRVAR(bz2__doc__, |
| 2137 | "The python bz2 module provides a comprehensive interface for\n\ |
| 2138 | the bz2 compression library. It implements a complete file\n\ |
| 2139 | interface, one shot (de)compression functions, and types for\n\ |
| 2140 | sequential (de)compression.\n\ |
| 2141 | "); |
| 2142 | |
| 2143 | DL_EXPORT(void) |
| 2144 | initbz2(void) |
| 2145 | { |
| 2146 | PyObject *m; |
| 2147 | |
| 2148 | BZ2File_Type.ob_type = &PyType_Type; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 2149 | BZ2Comp_Type.ob_type = &PyType_Type; |
| 2150 | BZ2Decomp_Type.ob_type = &PyType_Type; |
Gustavo Niemeyer | f8ca836 | 2002-11-05 16:50:05 +0000 | [diff] [blame] | 2151 | |
| 2152 | m = Py_InitModule3("bz2", bz2_methods, bz2__doc__); |
| 2153 | |
| 2154 | PyModule_AddObject(m, "__author__", PyString_FromString(__author__)); |
| 2155 | |
| 2156 | Py_INCREF(&BZ2File_Type); |
| 2157 | PyModule_AddObject(m, "BZ2File", (PyObject *)&BZ2File_Type); |
| 2158 | |
| 2159 | Py_INCREF(&BZ2Comp_Type); |
| 2160 | PyModule_AddObject(m, "BZ2Compressor", (PyObject *)&BZ2Comp_Type); |
| 2161 | |
| 2162 | Py_INCREF(&BZ2Decomp_Type); |
| 2163 | PyModule_AddObject(m, "BZ2Decompressor", (PyObject *)&BZ2Decomp_Type); |
| 2164 | } |