Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 1 | /* _bz2 - Low-level Python interface to libbzip2. */ |
| 2 | |
| 3 | #define PY_SSIZE_T_CLEAN |
| 4 | |
| 5 | #include "Python.h" |
| 6 | #include "structmember.h" |
| 7 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 8 | #include "pythread.h" |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 9 | |
| 10 | #include <bzlib.h> |
| 11 | #include <stdio.h> |
| 12 | |
| 13 | |
| 14 | #ifndef BZ_CONFIG_ERROR |
| 15 | #define BZ2_bzCompress bzCompress |
| 16 | #define BZ2_bzCompressInit bzCompressInit |
| 17 | #define BZ2_bzCompressEnd bzCompressEnd |
| 18 | #define BZ2_bzDecompress bzDecompress |
| 19 | #define BZ2_bzDecompressInit bzDecompressInit |
| 20 | #define BZ2_bzDecompressEnd bzDecompressEnd |
| 21 | #endif /* ! BZ_CONFIG_ERROR */ |
| 22 | |
| 23 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 24 | #define ACQUIRE_LOCK(obj) do { \ |
| 25 | if (!PyThread_acquire_lock((obj)->lock, 0)) { \ |
| 26 | Py_BEGIN_ALLOW_THREADS \ |
| 27 | PyThread_acquire_lock((obj)->lock, 1); \ |
| 28 | Py_END_ALLOW_THREADS \ |
| 29 | } } while (0) |
| 30 | #define RELEASE_LOCK(obj) PyThread_release_lock((obj)->lock) |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 31 | |
| 32 | |
| 33 | typedef struct { |
| 34 | PyObject_HEAD |
| 35 | bz_stream bzs; |
| 36 | int flushed; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 37 | PyThread_type_lock lock; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 38 | } BZ2Compressor; |
| 39 | |
| 40 | typedef struct { |
| 41 | PyObject_HEAD |
| 42 | bz_stream bzs; |
| 43 | char eof; /* T_BOOL expects a char */ |
| 44 | PyObject *unused_data; |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 45 | char needs_input; |
| 46 | char *input_buffer; |
| 47 | size_t input_buffer_size; |
| 48 | |
| 49 | /* bzs->avail_in is only 32 bit, so we store the true length |
| 50 | separately. Conversion and looping is encapsulated in |
| 51 | decompress_buf() */ |
| 52 | size_t bzs_avail_in_real; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 53 | PyThread_type_lock lock; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 54 | } BZ2Decompressor; |
| 55 | |
Larry Hastings | f256c22 | 2014-01-25 21:30:37 -0800 | [diff] [blame] | 56 | static PyTypeObject BZ2Compressor_Type; |
| 57 | static PyTypeObject BZ2Decompressor_Type; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 58 | |
| 59 | /* Helper functions. */ |
| 60 | |
| 61 | static int |
| 62 | catch_bz2_error(int bzerror) |
| 63 | { |
| 64 | switch(bzerror) { |
| 65 | case BZ_OK: |
| 66 | case BZ_RUN_OK: |
| 67 | case BZ_FLUSH_OK: |
| 68 | case BZ_FINISH_OK: |
| 69 | case BZ_STREAM_END: |
| 70 | return 0; |
| 71 | |
| 72 | #ifdef BZ_CONFIG_ERROR |
| 73 | case BZ_CONFIG_ERROR: |
| 74 | PyErr_SetString(PyExc_SystemError, |
| 75 | "libbzip2 was not compiled correctly"); |
| 76 | return 1; |
| 77 | #endif |
| 78 | case BZ_PARAM_ERROR: |
| 79 | PyErr_SetString(PyExc_ValueError, |
| 80 | "Internal error - " |
| 81 | "invalid parameters passed to libbzip2"); |
| 82 | return 1; |
| 83 | case BZ_MEM_ERROR: |
| 84 | PyErr_NoMemory(); |
| 85 | return 1; |
| 86 | case BZ_DATA_ERROR: |
| 87 | case BZ_DATA_ERROR_MAGIC: |
Serhiy Storchaka | 55fe1ae | 2017-04-16 10:46:38 +0300 | [diff] [blame] | 88 | PyErr_SetString(PyExc_OSError, "Invalid data stream"); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 89 | return 1; |
| 90 | case BZ_IO_ERROR: |
Serhiy Storchaka | 55fe1ae | 2017-04-16 10:46:38 +0300 | [diff] [blame] | 91 | PyErr_SetString(PyExc_OSError, "Unknown I/O error"); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 92 | return 1; |
| 93 | case BZ_UNEXPECTED_EOF: |
| 94 | PyErr_SetString(PyExc_EOFError, |
| 95 | "Compressed file ended before the logical " |
| 96 | "end-of-stream was detected"); |
| 97 | return 1; |
| 98 | case BZ_SEQUENCE_ERROR: |
| 99 | PyErr_SetString(PyExc_RuntimeError, |
| 100 | "Internal error - " |
| 101 | "Invalid sequence of commands sent to libbzip2"); |
| 102 | return 1; |
| 103 | default: |
Serhiy Storchaka | 55fe1ae | 2017-04-16 10:46:38 +0300 | [diff] [blame] | 104 | PyErr_Format(PyExc_OSError, |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 105 | "Unrecognized error from libbzip2: %d", bzerror); |
| 106 | return 1; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | #if BUFSIZ < 8192 |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 111 | #define INITIAL_BUFFER_SIZE 8192 |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 112 | #else |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 113 | #define INITIAL_BUFFER_SIZE BUFSIZ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 114 | #endif |
| 115 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 116 | static int |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 117 | grow_buffer(PyObject **buf, Py_ssize_t max_length) |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 118 | { |
Nadeem Vawda | 72d6a13 | 2011-10-13 13:38:14 +0200 | [diff] [blame] | 119 | /* Expand the buffer by an amount proportional to the current size, |
| 120 | giving us amortized linear-time behavior. Use a less-than-double |
| 121 | growth factor to avoid excessive allocation. */ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 122 | size_t size = PyBytes_GET_SIZE(*buf); |
Nadeem Vawda | 18b7fcc | 2012-10-21 21:16:58 +0200 | [diff] [blame] | 123 | size_t new_size = size + (size >> 3) + 6; |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 124 | |
| 125 | if (max_length > 0 && new_size > (size_t) max_length) |
| 126 | new_size = (size_t) max_length; |
| 127 | |
Nadeem Vawda | 18b7fcc | 2012-10-21 21:16:58 +0200 | [diff] [blame] | 128 | if (new_size > size) { |
| 129 | return _PyBytes_Resize(buf, new_size); |
| 130 | } else { /* overflow */ |
| 131 | PyErr_SetString(PyExc_OverflowError, |
| 132 | "Unable to allocate buffer - output too large"); |
| 133 | return -1; |
| 134 | } |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | |
| 138 | /* BZ2Compressor class. */ |
| 139 | |
| 140 | static PyObject * |
| 141 | compress(BZ2Compressor *c, char *data, size_t len, int action) |
| 142 | { |
| 143 | size_t data_size = 0; |
| 144 | PyObject *result; |
| 145 | |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 146 | result = PyBytes_FromStringAndSize(NULL, INITIAL_BUFFER_SIZE); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 147 | if (result == NULL) |
| 148 | return NULL; |
Nadeem Vawda | 57cb81d | 2013-01-02 23:05:56 +0100 | [diff] [blame] | 149 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 150 | c->bzs.next_in = data; |
Nadeem Vawda | 57cb81d | 2013-01-02 23:05:56 +0100 | [diff] [blame] | 151 | c->bzs.avail_in = 0; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 152 | c->bzs.next_out = PyBytes_AS_STRING(result); |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 153 | c->bzs.avail_out = INITIAL_BUFFER_SIZE; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 154 | for (;;) { |
| 155 | char *this_out; |
| 156 | int bzerror; |
| 157 | |
Nadeem Vawda | 57cb81d | 2013-01-02 23:05:56 +0100 | [diff] [blame] | 158 | /* On a 64-bit system, len might not fit in avail_in (an unsigned int). |
| 159 | Do compression in chunks of no more than UINT_MAX bytes each. */ |
Nadeem Vawda | ea4b46f | 2011-04-12 23:02:42 +0200 | [diff] [blame] | 160 | if (c->bzs.avail_in == 0 && len > 0) { |
Victor Stinner | fbf50d4 | 2013-06-04 23:18:48 +0200 | [diff] [blame] | 161 | c->bzs.avail_in = (unsigned int)Py_MIN(len, UINT_MAX); |
Nadeem Vawda | ea4b46f | 2011-04-12 23:02:42 +0200 | [diff] [blame] | 162 | len -= c->bzs.avail_in; |
| 163 | } |
| 164 | |
Nadeem Vawda | 57cb81d | 2013-01-02 23:05:56 +0100 | [diff] [blame] | 165 | /* In regular compression mode, stop when input data is exhausted. */ |
| 166 | if (action == BZ_RUN && c->bzs.avail_in == 0) |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 167 | break; |
| 168 | |
| 169 | if (c->bzs.avail_out == 0) { |
Nadeem Vawda | 18b7fcc | 2012-10-21 21:16:58 +0200 | [diff] [blame] | 170 | size_t buffer_left = PyBytes_GET_SIZE(result) - data_size; |
| 171 | if (buffer_left == 0) { |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 172 | if (grow_buffer(&result, -1) < 0) |
Nadeem Vawda | 18b7fcc | 2012-10-21 21:16:58 +0200 | [diff] [blame] | 173 | goto error; |
| 174 | c->bzs.next_out = PyBytes_AS_STRING(result) + data_size; |
| 175 | buffer_left = PyBytes_GET_SIZE(result) - data_size; |
| 176 | } |
Victor Stinner | fbf50d4 | 2013-06-04 23:18:48 +0200 | [diff] [blame] | 177 | c->bzs.avail_out = (unsigned int)Py_MIN(buffer_left, UINT_MAX); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 178 | } |
Nadeem Vawda | 57cb81d | 2013-01-02 23:05:56 +0100 | [diff] [blame] | 179 | |
| 180 | Py_BEGIN_ALLOW_THREADS |
| 181 | this_out = c->bzs.next_out; |
| 182 | bzerror = BZ2_bzCompress(&c->bzs, action); |
| 183 | data_size += c->bzs.next_out - this_out; |
| 184 | Py_END_ALLOW_THREADS |
| 185 | if (catch_bz2_error(bzerror)) |
| 186 | goto error; |
| 187 | |
| 188 | /* In flushing mode, stop when all buffered data has been flushed. */ |
| 189 | if (action == BZ_FINISH && bzerror == BZ_STREAM_END) |
| 190 | break; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 191 | } |
Victor Stinner | 706768c | 2014-08-16 01:03:39 +0200 | [diff] [blame] | 192 | if (data_size != (size_t)PyBytes_GET_SIZE(result)) |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 193 | if (_PyBytes_Resize(&result, data_size) < 0) |
| 194 | goto error; |
| 195 | return result; |
| 196 | |
| 197 | error: |
| 198 | Py_XDECREF(result); |
| 199 | return NULL; |
| 200 | } |
| 201 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 202 | /*[clinic input] |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 203 | module _bz2 |
Larry Hastings | c204726 | 2014-01-25 20:43:29 -0800 | [diff] [blame] | 204 | class _bz2.BZ2Compressor "BZ2Compressor *" "&BZ2Compressor_Type" |
| 205 | class _bz2.BZ2Decompressor "BZ2Decompressor *" "&BZ2Decompressor_Type" |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 206 | [clinic start generated code]*/ |
Serhiy Storchaka | 1009bf1 | 2015-04-03 23:53:51 +0300 | [diff] [blame] | 207 | /*[clinic end generated code: output=da39a3ee5e6b4b0d input=dc7d7992a79f9cb7]*/ |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 208 | |
Larry Hastings | f256c22 | 2014-01-25 21:30:37 -0800 | [diff] [blame] | 209 | #include "clinic/_bz2module.c.h" |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 210 | |
| 211 | /*[clinic input] |
| 212 | _bz2.BZ2Compressor.compress |
| 213 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 214 | data: Py_buffer |
| 215 | / |
| 216 | |
| 217 | Provide data to the compressor object. |
| 218 | |
| 219 | Returns a chunk of compressed data if possible, or b'' otherwise. |
| 220 | |
| 221 | When you have finished providing data to the compressor, call the |
| 222 | flush() method to finish the compression process. |
| 223 | [clinic start generated code]*/ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 224 | |
| 225 | static PyObject * |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 226 | _bz2_BZ2Compressor_compress_impl(BZ2Compressor *self, Py_buffer *data) |
Larry Hastings | 581ee36 | 2014-01-28 05:00:08 -0800 | [diff] [blame] | 227 | /*[clinic end generated code: output=59365426e941fbcc input=85c963218070fc4c]*/ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 228 | { |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 229 | PyObject *result = NULL; |
| 230 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 231 | ACQUIRE_LOCK(self); |
| 232 | if (self->flushed) |
| 233 | PyErr_SetString(PyExc_ValueError, "Compressor has been flushed"); |
| 234 | else |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 235 | result = compress(self, data->buf, data->len, BZ_RUN); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 236 | RELEASE_LOCK(self); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 237 | return result; |
| 238 | } |
| 239 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 240 | /*[clinic input] |
| 241 | _bz2.BZ2Compressor.flush |
| 242 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 243 | Finish the compression process. |
| 244 | |
| 245 | Returns the compressed data left in internal buffers. |
| 246 | |
| 247 | The compressor object may not be used after this method is called. |
| 248 | [clinic start generated code]*/ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 249 | |
| 250 | static PyObject * |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 251 | _bz2_BZ2Compressor_flush_impl(BZ2Compressor *self) |
Larry Hastings | 581ee36 | 2014-01-28 05:00:08 -0800 | [diff] [blame] | 252 | /*[clinic end generated code: output=3ef03fc1b092a701 input=d64405d3c6f76691]*/ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 253 | { |
| 254 | PyObject *result = NULL; |
| 255 | |
| 256 | ACQUIRE_LOCK(self); |
| 257 | if (self->flushed) |
| 258 | PyErr_SetString(PyExc_ValueError, "Repeated call to flush()"); |
| 259 | else { |
| 260 | self->flushed = 1; |
| 261 | result = compress(self, NULL, 0, BZ_FINISH); |
| 262 | } |
| 263 | RELEASE_LOCK(self); |
| 264 | return result; |
| 265 | } |
| 266 | |
Nadeem Vawda | 3797065 | 2013-10-28 21:35:23 +0100 | [diff] [blame] | 267 | static PyObject * |
| 268 | BZ2Compressor_getstate(BZ2Compressor *self, PyObject *noargs) |
| 269 | { |
| 270 | PyErr_Format(PyExc_TypeError, "cannot serialize '%s' object", |
| 271 | Py_TYPE(self)->tp_name); |
| 272 | return NULL; |
| 273 | } |
| 274 | |
Victor Stinner | 5064a52 | 2013-07-07 16:50:27 +0200 | [diff] [blame] | 275 | static void* |
| 276 | BZ2_Malloc(void* ctx, int items, int size) |
| 277 | { |
| 278 | if (items < 0 || size < 0) |
| 279 | return NULL; |
| 280 | if ((size_t)items > (size_t)PY_SSIZE_T_MAX / (size_t)size) |
| 281 | return NULL; |
| 282 | /* PyMem_Malloc() cannot be used: compress() and decompress() |
| 283 | release the GIL */ |
| 284 | return PyMem_RawMalloc(items * size); |
| 285 | } |
| 286 | |
| 287 | static void |
| 288 | BZ2_Free(void* ctx, void *ptr) |
| 289 | { |
Victor Stinner | b7f1f65 | 2013-07-07 17:10:34 +0200 | [diff] [blame] | 290 | PyMem_RawFree(ptr); |
Victor Stinner | 5064a52 | 2013-07-07 16:50:27 +0200 | [diff] [blame] | 291 | } |
| 292 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 293 | /*[clinic input] |
| 294 | _bz2.BZ2Compressor.__init__ |
| 295 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 296 | compresslevel: int = 9 |
| 297 | Compression level, as a number between 1 and 9. |
| 298 | / |
| 299 | |
| 300 | Create a compressor object for compressing data incrementally. |
| 301 | |
| 302 | For one-shot compression, use the compress() function instead. |
| 303 | [clinic start generated code]*/ |
| 304 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 305 | static int |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 306 | _bz2_BZ2Compressor___init___impl(BZ2Compressor *self, int compresslevel) |
Larry Hastings | 581ee36 | 2014-01-28 05:00:08 -0800 | [diff] [blame] | 307 | /*[clinic end generated code: output=c4e6adfd02963827 input=4e1ff7b8394b6e9a]*/ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 308 | { |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 309 | int bzerror; |
| 310 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 311 | if (!(1 <= compresslevel && compresslevel <= 9)) { |
| 312 | PyErr_SetString(PyExc_ValueError, |
| 313 | "compresslevel must be between 1 and 9"); |
| 314 | return -1; |
| 315 | } |
| 316 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 317 | self->lock = PyThread_allocate_lock(); |
| 318 | if (self->lock == NULL) { |
| 319 | PyErr_SetString(PyExc_MemoryError, "Unable to allocate lock"); |
| 320 | return -1; |
| 321 | } |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 322 | |
Victor Stinner | 5064a52 | 2013-07-07 16:50:27 +0200 | [diff] [blame] | 323 | self->bzs.opaque = NULL; |
| 324 | self->bzs.bzalloc = BZ2_Malloc; |
| 325 | self->bzs.bzfree = BZ2_Free; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 326 | bzerror = BZ2_bzCompressInit(&self->bzs, compresslevel, 0, 0); |
| 327 | if (catch_bz2_error(bzerror)) |
| 328 | goto error; |
| 329 | |
| 330 | return 0; |
| 331 | |
| 332 | error: |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 333 | PyThread_free_lock(self->lock); |
| 334 | self->lock = NULL; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 335 | return -1; |
| 336 | } |
| 337 | |
| 338 | static void |
| 339 | BZ2Compressor_dealloc(BZ2Compressor *self) |
| 340 | { |
| 341 | BZ2_bzCompressEnd(&self->bzs); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 342 | if (self->lock != NULL) |
| 343 | PyThread_free_lock(self->lock); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 344 | Py_TYPE(self)->tp_free((PyObject *)self); |
| 345 | } |
| 346 | |
| 347 | static PyMethodDef BZ2Compressor_methods[] = { |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 348 | _BZ2_BZ2COMPRESSOR_COMPRESS_METHODDEF |
| 349 | _BZ2_BZ2COMPRESSOR_FLUSH_METHODDEF |
Nadeem Vawda | 3797065 | 2013-10-28 21:35:23 +0100 | [diff] [blame] | 350 | {"__getstate__", (PyCFunction)BZ2Compressor_getstate, METH_NOARGS}, |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 351 | {NULL} |
| 352 | }; |
| 353 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 354 | |
| 355 | static PyTypeObject BZ2Compressor_Type = { |
| 356 | PyVarObject_HEAD_INIT(NULL, 0) |
| 357 | "_bz2.BZ2Compressor", /* tp_name */ |
| 358 | sizeof(BZ2Compressor), /* tp_basicsize */ |
| 359 | 0, /* tp_itemsize */ |
| 360 | (destructor)BZ2Compressor_dealloc, /* tp_dealloc */ |
| 361 | 0, /* tp_print */ |
| 362 | 0, /* tp_getattr */ |
| 363 | 0, /* tp_setattr */ |
| 364 | 0, /* tp_reserved */ |
| 365 | 0, /* tp_repr */ |
| 366 | 0, /* tp_as_number */ |
| 367 | 0, /* tp_as_sequence */ |
| 368 | 0, /* tp_as_mapping */ |
| 369 | 0, /* tp_hash */ |
| 370 | 0, /* tp_call */ |
| 371 | 0, /* tp_str */ |
| 372 | 0, /* tp_getattro */ |
| 373 | 0, /* tp_setattro */ |
| 374 | 0, /* tp_as_buffer */ |
| 375 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 376 | _bz2_BZ2Compressor___init____doc__, /* tp_doc */ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 377 | 0, /* tp_traverse */ |
| 378 | 0, /* tp_clear */ |
| 379 | 0, /* tp_richcompare */ |
| 380 | 0, /* tp_weaklistoffset */ |
| 381 | 0, /* tp_iter */ |
| 382 | 0, /* tp_iternext */ |
| 383 | BZ2Compressor_methods, /* tp_methods */ |
| 384 | 0, /* tp_members */ |
| 385 | 0, /* tp_getset */ |
| 386 | 0, /* tp_base */ |
| 387 | 0, /* tp_dict */ |
| 388 | 0, /* tp_descr_get */ |
| 389 | 0, /* tp_descr_set */ |
| 390 | 0, /* tp_dictoffset */ |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 391 | _bz2_BZ2Compressor___init__, /* tp_init */ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 392 | 0, /* tp_alloc */ |
| 393 | PyType_GenericNew, /* tp_new */ |
| 394 | }; |
| 395 | |
| 396 | |
| 397 | /* BZ2Decompressor class. */ |
| 398 | |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 399 | /* Decompress data of length d->bzs_avail_in_real in d->bzs.next_in. The output |
| 400 | buffer is allocated dynamically and returned. At most max_length bytes are |
| 401 | returned, so some of the input may not be consumed. d->bzs.next_in and |
| 402 | d->bzs_avail_in_real are updated to reflect the consumed input. */ |
| 403 | static PyObject* |
| 404 | decompress_buf(BZ2Decompressor *d, Py_ssize_t max_length) |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 405 | { |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 406 | /* data_size is strictly positive, but because we repeatedly have to |
| 407 | compare against max_length and PyBytes_GET_SIZE we declare it as |
| 408 | signed */ |
| 409 | Py_ssize_t data_size = 0; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 410 | PyObject *result; |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 411 | bz_stream *bzs = &d->bzs; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 412 | |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 413 | if (max_length < 0 || max_length >= INITIAL_BUFFER_SIZE) |
| 414 | result = PyBytes_FromStringAndSize(NULL, INITIAL_BUFFER_SIZE); |
| 415 | else |
| 416 | result = PyBytes_FromStringAndSize(NULL, max_length); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 417 | if (result == NULL) |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 418 | return NULL; |
| 419 | |
| 420 | bzs->next_out = PyBytes_AS_STRING(result); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 421 | for (;;) { |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 422 | int bzret; |
| 423 | size_t avail; |
| 424 | |
| 425 | /* On a 64-bit system, buffer length might not fit in avail_out, so we |
| 426 | do decompression in chunks of no more than UINT_MAX bytes |
| 427 | each. Note that the expression for `avail` is guaranteed to be |
| 428 | positive, so the cast is safe. */ |
| 429 | avail = (size_t) (PyBytes_GET_SIZE(result) - data_size); |
| 430 | bzs->avail_out = (unsigned int)Py_MIN(avail, UINT_MAX); |
| 431 | bzs->avail_in = (unsigned int)Py_MIN(d->bzs_avail_in_real, UINT_MAX); |
| 432 | d->bzs_avail_in_real -= bzs->avail_in; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 433 | |
| 434 | Py_BEGIN_ALLOW_THREADS |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 435 | bzret = BZ2_bzDecompress(bzs); |
| 436 | data_size = bzs->next_out - PyBytes_AS_STRING(result); |
| 437 | d->bzs_avail_in_real += bzs->avail_in; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 438 | Py_END_ALLOW_THREADS |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 439 | if (catch_bz2_error(bzret)) |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 440 | goto error; |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 441 | if (bzret == BZ_STREAM_END) { |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 442 | d->eof = 1; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 443 | break; |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 444 | } else if (d->bzs_avail_in_real == 0) { |
| 445 | break; |
| 446 | } else if (bzs->avail_out == 0) { |
| 447 | if (data_size == max_length) |
Nadeem Vawda | ea4b46f | 2011-04-12 23:02:42 +0200 | [diff] [blame] | 448 | break; |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 449 | if (data_size == PyBytes_GET_SIZE(result) && |
| 450 | grow_buffer(&result, max_length) == -1) |
| 451 | goto error; |
| 452 | bzs->next_out = PyBytes_AS_STRING(result) + data_size; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 453 | } |
| 454 | } |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 455 | if (data_size != PyBytes_GET_SIZE(result)) |
| 456 | if (_PyBytes_Resize(&result, data_size) == -1) |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 457 | goto error; |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 458 | |
| 459 | return result; |
| 460 | |
| 461 | error: |
| 462 | Py_XDECREF(result); |
| 463 | return NULL; |
| 464 | } |
| 465 | |
| 466 | |
| 467 | static PyObject * |
| 468 | decompress(BZ2Decompressor *d, char *data, size_t len, Py_ssize_t max_length) |
| 469 | { |
| 470 | char input_buffer_in_use; |
| 471 | PyObject *result; |
| 472 | bz_stream *bzs = &d->bzs; |
| 473 | |
| 474 | /* Prepend unconsumed input if necessary */ |
| 475 | if (bzs->next_in != NULL) { |
| 476 | size_t avail_now, avail_total; |
| 477 | |
| 478 | /* Number of bytes we can append to input buffer */ |
| 479 | avail_now = (d->input_buffer + d->input_buffer_size) |
| 480 | - (bzs->next_in + d->bzs_avail_in_real); |
| 481 | |
| 482 | /* Number of bytes we can append if we move existing |
| 483 | contents to beginning of buffer (overwriting |
| 484 | consumed input) */ |
| 485 | avail_total = d->input_buffer_size - d->bzs_avail_in_real; |
| 486 | |
| 487 | if (avail_total < len) { |
| 488 | size_t offset = bzs->next_in - d->input_buffer; |
| 489 | char *tmp; |
| 490 | size_t new_size = d->input_buffer_size + len - avail_now; |
| 491 | |
| 492 | /* Assign to temporary variable first, so we don't |
| 493 | lose address of allocated buffer if realloc fails */ |
| 494 | tmp = PyMem_Realloc(d->input_buffer, new_size); |
| 495 | if (tmp == NULL) { |
| 496 | PyErr_SetNone(PyExc_MemoryError); |
| 497 | return NULL; |
| 498 | } |
| 499 | d->input_buffer = tmp; |
| 500 | d->input_buffer_size = new_size; |
| 501 | |
| 502 | bzs->next_in = d->input_buffer + offset; |
| 503 | } |
| 504 | else if (avail_now < len) { |
| 505 | memmove(d->input_buffer, bzs->next_in, |
| 506 | d->bzs_avail_in_real); |
| 507 | bzs->next_in = d->input_buffer; |
| 508 | } |
| 509 | memcpy((void*)(bzs->next_in + d->bzs_avail_in_real), data, len); |
| 510 | d->bzs_avail_in_real += len; |
| 511 | input_buffer_in_use = 1; |
| 512 | } |
| 513 | else { |
| 514 | bzs->next_in = data; |
| 515 | d->bzs_avail_in_real = len; |
| 516 | input_buffer_in_use = 0; |
| 517 | } |
| 518 | |
| 519 | result = decompress_buf(d, max_length); |
Martin Panter | 38317d3 | 2016-10-01 02:45:17 +0000 | [diff] [blame] | 520 | if(result == NULL) { |
| 521 | bzs->next_in = NULL; |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 522 | return NULL; |
Martin Panter | 38317d3 | 2016-10-01 02:45:17 +0000 | [diff] [blame] | 523 | } |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 524 | |
| 525 | if (d->eof) { |
| 526 | d->needs_input = 0; |
| 527 | if (d->bzs_avail_in_real > 0) { |
Serhiy Storchaka | 4884271 | 2016-04-06 09:45:48 +0300 | [diff] [blame] | 528 | Py_XSETREF(d->unused_data, |
Serhiy Storchaka | 4a1e70f | 2015-12-27 12:36:18 +0200 | [diff] [blame] | 529 | PyBytes_FromStringAndSize(bzs->next_in, d->bzs_avail_in_real)); |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 530 | if (d->unused_data == NULL) |
| 531 | goto error; |
| 532 | } |
| 533 | } |
| 534 | else if (d->bzs_avail_in_real == 0) { |
| 535 | bzs->next_in = NULL; |
| 536 | d->needs_input = 1; |
| 537 | } |
| 538 | else { |
| 539 | d->needs_input = 0; |
| 540 | |
| 541 | /* If we did not use the input buffer, we now have |
| 542 | to copy the tail from the caller's buffer into the |
| 543 | input buffer */ |
| 544 | if (!input_buffer_in_use) { |
| 545 | |
| 546 | /* Discard buffer if it's too small |
| 547 | (resizing it may needlessly copy the current contents) */ |
| 548 | if (d->input_buffer != NULL && |
| 549 | d->input_buffer_size < d->bzs_avail_in_real) { |
| 550 | PyMem_Free(d->input_buffer); |
| 551 | d->input_buffer = NULL; |
| 552 | } |
| 553 | |
| 554 | /* Allocate if necessary */ |
| 555 | if (d->input_buffer == NULL) { |
| 556 | d->input_buffer = PyMem_Malloc(d->bzs_avail_in_real); |
| 557 | if (d->input_buffer == NULL) { |
| 558 | PyErr_SetNone(PyExc_MemoryError); |
| 559 | goto error; |
| 560 | } |
| 561 | d->input_buffer_size = d->bzs_avail_in_real; |
| 562 | } |
| 563 | |
| 564 | /* Copy tail */ |
| 565 | memcpy(d->input_buffer, bzs->next_in, d->bzs_avail_in_real); |
| 566 | bzs->next_in = d->input_buffer; |
| 567 | } |
| 568 | } |
| 569 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 570 | return result; |
| 571 | |
| 572 | error: |
| 573 | Py_XDECREF(result); |
| 574 | return NULL; |
| 575 | } |
| 576 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 577 | /*[clinic input] |
| 578 | _bz2.BZ2Decompressor.decompress |
| 579 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 580 | data: Py_buffer |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 581 | max_length: Py_ssize_t=-1 |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 582 | |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 583 | Decompress *data*, returning uncompressed data as bytes. |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 584 | |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 585 | If *max_length* is nonnegative, returns at most *max_length* bytes of |
| 586 | decompressed data. If this limit is reached and further output can be |
| 587 | produced, *self.needs_input* will be set to ``False``. In this case, the next |
| 588 | call to *decompress()* may provide *data* as b'' to obtain more of the output. |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 589 | |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 590 | If all of the input data was decompressed and returned (either because this |
| 591 | was less than *max_length* bytes, or because *max_length* was negative), |
| 592 | *self.needs_input* will be set to True. |
| 593 | |
| 594 | Attempting to decompress data after the end of stream is reached raises an |
| 595 | EOFError. Any data found after the end of the stream is ignored and saved in |
| 596 | the unused_data attribute. |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 597 | [clinic start generated code]*/ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 598 | |
| 599 | static PyObject * |
Larry Hastings | 89964c4 | 2015-04-14 18:07:59 -0400 | [diff] [blame] | 600 | _bz2_BZ2Decompressor_decompress_impl(BZ2Decompressor *self, Py_buffer *data, |
| 601 | Py_ssize_t max_length) |
Serhiy Storchaka | 7a9579c | 2016-05-02 13:45:20 +0300 | [diff] [blame] | 602 | /*[clinic end generated code: output=23e41045deb240a3 input=52e1ffc66a8ea624]*/ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 603 | { |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 604 | PyObject *result = NULL; |
| 605 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 606 | ACQUIRE_LOCK(self); |
| 607 | if (self->eof) |
| 608 | PyErr_SetString(PyExc_EOFError, "End of stream already reached"); |
| 609 | else |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 610 | result = decompress(self, data->buf, data->len, max_length); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 611 | RELEASE_LOCK(self); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 612 | return result; |
| 613 | } |
| 614 | |
Nadeem Vawda | 3797065 | 2013-10-28 21:35:23 +0100 | [diff] [blame] | 615 | static PyObject * |
| 616 | BZ2Decompressor_getstate(BZ2Decompressor *self, PyObject *noargs) |
| 617 | { |
| 618 | PyErr_Format(PyExc_TypeError, "cannot serialize '%s' object", |
| 619 | Py_TYPE(self)->tp_name); |
| 620 | return NULL; |
| 621 | } |
| 622 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 623 | /*[clinic input] |
| 624 | _bz2.BZ2Decompressor.__init__ |
| 625 | |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 626 | Create a decompressor object for decompressing data incrementally. |
| 627 | |
| 628 | For one-shot decompression, use the decompress() function instead. |
| 629 | [clinic start generated code]*/ |
| 630 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 631 | static int |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 632 | _bz2_BZ2Decompressor___init___impl(BZ2Decompressor *self) |
Larry Hastings | 581ee36 | 2014-01-28 05:00:08 -0800 | [diff] [blame] | 633 | /*[clinic end generated code: output=e4d2b9bb866ab8f1 input=95f6500dcda60088]*/ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 634 | { |
| 635 | int bzerror; |
| 636 | |
Victor Stinner | 9b7cf75 | 2018-06-23 10:35:23 +0200 | [diff] [blame] | 637 | PyThread_type_lock lock = PyThread_allocate_lock(); |
| 638 | if (lock == NULL) { |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 639 | PyErr_SetString(PyExc_MemoryError, "Unable to allocate lock"); |
| 640 | return -1; |
| 641 | } |
Victor Stinner | 9b7cf75 | 2018-06-23 10:35:23 +0200 | [diff] [blame] | 642 | if (self->lock != NULL) { |
| 643 | PyThread_free_lock(self->lock); |
| 644 | } |
| 645 | self->lock = lock; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 646 | |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 647 | self->needs_input = 1; |
| 648 | self->bzs_avail_in_real = 0; |
| 649 | self->input_buffer = NULL; |
| 650 | self->input_buffer_size = 0; |
Oren Milman | d019bc8 | 2018-02-13 12:28:33 +0200 | [diff] [blame] | 651 | Py_XSETREF(self->unused_data, PyBytes_FromStringAndSize(NULL, 0)); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 652 | if (self->unused_data == NULL) |
| 653 | goto error; |
Serhiy Storchaka | 009b811 | 2015-03-18 21:53:15 +0200 | [diff] [blame] | 654 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 655 | bzerror = BZ2_bzDecompressInit(&self->bzs, 0, 0); |
| 656 | if (catch_bz2_error(bzerror)) |
| 657 | goto error; |
| 658 | |
| 659 | return 0; |
| 660 | |
| 661 | error: |
| 662 | Py_CLEAR(self->unused_data); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 663 | PyThread_free_lock(self->lock); |
| 664 | self->lock = NULL; |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 665 | return -1; |
| 666 | } |
| 667 | |
| 668 | static void |
| 669 | BZ2Decompressor_dealloc(BZ2Decompressor *self) |
| 670 | { |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 671 | if(self->input_buffer != NULL) |
| 672 | PyMem_Free(self->input_buffer); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 673 | BZ2_bzDecompressEnd(&self->bzs); |
| 674 | Py_CLEAR(self->unused_data); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 675 | if (self->lock != NULL) |
| 676 | PyThread_free_lock(self->lock); |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 677 | Py_TYPE(self)->tp_free((PyObject *)self); |
| 678 | } |
| 679 | |
| 680 | static PyMethodDef BZ2Decompressor_methods[] = { |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 681 | _BZ2_BZ2DECOMPRESSOR_DECOMPRESS_METHODDEF |
Nadeem Vawda | 3797065 | 2013-10-28 21:35:23 +0100 | [diff] [blame] | 682 | {"__getstate__", (PyCFunction)BZ2Decompressor_getstate, METH_NOARGS}, |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 683 | {NULL} |
| 684 | }; |
| 685 | |
| 686 | PyDoc_STRVAR(BZ2Decompressor_eof__doc__, |
| 687 | "True if the end-of-stream marker has been reached."); |
| 688 | |
| 689 | PyDoc_STRVAR(BZ2Decompressor_unused_data__doc__, |
| 690 | "Data found after the end of the compressed stream."); |
| 691 | |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 692 | PyDoc_STRVAR(BZ2Decompressor_needs_input_doc, |
| 693 | "True if more input is needed before more decompressed data can be produced."); |
| 694 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 695 | static PyMemberDef BZ2Decompressor_members[] = { |
| 696 | {"eof", T_BOOL, offsetof(BZ2Decompressor, eof), |
| 697 | READONLY, BZ2Decompressor_eof__doc__}, |
| 698 | {"unused_data", T_OBJECT_EX, offsetof(BZ2Decompressor, unused_data), |
| 699 | READONLY, BZ2Decompressor_unused_data__doc__}, |
Antoine Pitrou | e71258a | 2015-02-26 13:08:07 +0100 | [diff] [blame] | 700 | {"needs_input", T_BOOL, offsetof(BZ2Decompressor, needs_input), READONLY, |
| 701 | BZ2Decompressor_needs_input_doc}, |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 702 | {NULL} |
| 703 | }; |
| 704 | |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 705 | static PyTypeObject BZ2Decompressor_Type = { |
| 706 | PyVarObject_HEAD_INIT(NULL, 0) |
| 707 | "_bz2.BZ2Decompressor", /* tp_name */ |
| 708 | sizeof(BZ2Decompressor), /* tp_basicsize */ |
| 709 | 0, /* tp_itemsize */ |
| 710 | (destructor)BZ2Decompressor_dealloc,/* tp_dealloc */ |
| 711 | 0, /* tp_print */ |
| 712 | 0, /* tp_getattr */ |
| 713 | 0, /* tp_setattr */ |
| 714 | 0, /* tp_reserved */ |
| 715 | 0, /* tp_repr */ |
| 716 | 0, /* tp_as_number */ |
| 717 | 0, /* tp_as_sequence */ |
| 718 | 0, /* tp_as_mapping */ |
| 719 | 0, /* tp_hash */ |
| 720 | 0, /* tp_call */ |
| 721 | 0, /* tp_str */ |
| 722 | 0, /* tp_getattro */ |
| 723 | 0, /* tp_setattro */ |
| 724 | 0, /* tp_as_buffer */ |
| 725 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 726 | _bz2_BZ2Decompressor___init____doc__, /* tp_doc */ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 727 | 0, /* tp_traverse */ |
| 728 | 0, /* tp_clear */ |
| 729 | 0, /* tp_richcompare */ |
| 730 | 0, /* tp_weaklistoffset */ |
| 731 | 0, /* tp_iter */ |
| 732 | 0, /* tp_iternext */ |
| 733 | BZ2Decompressor_methods, /* tp_methods */ |
| 734 | BZ2Decompressor_members, /* tp_members */ |
| 735 | 0, /* tp_getset */ |
| 736 | 0, /* tp_base */ |
| 737 | 0, /* tp_dict */ |
| 738 | 0, /* tp_descr_get */ |
| 739 | 0, /* tp_descr_set */ |
| 740 | 0, /* tp_dictoffset */ |
Serhiy Storchaka | 1bc4bb2 | 2014-01-25 12:07:57 +0200 | [diff] [blame] | 741 | _bz2_BZ2Decompressor___init__, /* tp_init */ |
Antoine Pitrou | 37dc5f8 | 2011-04-03 17:05:46 +0200 | [diff] [blame] | 742 | 0, /* tp_alloc */ |
| 743 | PyType_GenericNew, /* tp_new */ |
| 744 | }; |
| 745 | |
| 746 | |
| 747 | /* Module initialization. */ |
| 748 | |
| 749 | static struct PyModuleDef _bz2module = { |
| 750 | PyModuleDef_HEAD_INIT, |
| 751 | "_bz2", |
| 752 | NULL, |
| 753 | -1, |
| 754 | NULL, |
| 755 | NULL, |
| 756 | NULL, |
| 757 | NULL, |
| 758 | NULL |
| 759 | }; |
| 760 | |
| 761 | PyMODINIT_FUNC |
| 762 | PyInit__bz2(void) |
| 763 | { |
| 764 | PyObject *m; |
| 765 | |
| 766 | if (PyType_Ready(&BZ2Compressor_Type) < 0) |
| 767 | return NULL; |
| 768 | if (PyType_Ready(&BZ2Decompressor_Type) < 0) |
| 769 | return NULL; |
| 770 | |
| 771 | m = PyModule_Create(&_bz2module); |
| 772 | if (m == NULL) |
| 773 | return NULL; |
| 774 | |
| 775 | Py_INCREF(&BZ2Compressor_Type); |
| 776 | PyModule_AddObject(m, "BZ2Compressor", (PyObject *)&BZ2Compressor_Type); |
| 777 | |
| 778 | Py_INCREF(&BZ2Decompressor_Type); |
| 779 | PyModule_AddObject(m, "BZ2Decompressor", |
| 780 | (PyObject *)&BZ2Decompressor_Type); |
| 781 | |
| 782 | return m; |
| 783 | } |