Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1 | /* zlibmodule.c -- gzip-compatible data compression */ |
Martin v. Löwis | 1dbce44 | 2001-10-09 10:54:31 +0000 | [diff] [blame] | 2 | /* See http://www.gzip.org/zlib/ */ |
Mark Hammond | ae8c268 | 2001-01-31 10:28:03 +0000 | [diff] [blame] | 3 | |
Tim Peters | ee826f8 | 2001-01-31 19:39:44 +0000 | [diff] [blame] | 4 | /* Windows users: read Python's PCbuild\readme.txt */ |
Mark Hammond | ae8c268 | 2001-01-31 10:28:03 +0000 | [diff] [blame] | 5 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 6 | |
Guido van Rossum | 97b5457 | 1997-06-03 22:21:47 +0000 | [diff] [blame] | 7 | #include "Python.h" |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 8 | #include "structmember.h" |
Guido van Rossum | 97b5457 | 1997-06-03 22:21:47 +0000 | [diff] [blame] | 9 | #include "zlib.h" |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 10 | |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 11 | #ifdef WITH_THREAD |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 12 | #include "pythread.h" |
| 13 | #define ENTER_ZLIB(obj) \ |
| 14 | Py_BEGIN_ALLOW_THREADS; \ |
| 15 | PyThread_acquire_lock((obj)->lock, 1); \ |
| 16 | Py_END_ALLOW_THREADS; |
| 17 | #define LEAVE_ZLIB(obj) PyThread_release_lock((obj)->lock); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 18 | #else |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 19 | #define ENTER_ZLIB(obj) |
| 20 | #define LEAVE_ZLIB(obj) |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 21 | #endif |
| 22 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 23 | /* The following parameters are copied from zutil.h, version 0.95 */ |
| 24 | #define DEFLATED 8 |
| 25 | #if MAX_MEM_LEVEL >= 8 |
| 26 | # define DEF_MEM_LEVEL 8 |
| 27 | #else |
| 28 | # define DEF_MEM_LEVEL MAX_MEM_LEVEL |
| 29 | #endif |
| 30 | #define DEF_WBITS MAX_WBITS |
| 31 | |
Guido van Rossum | b729a1d | 1999-04-07 20:23:17 +0000 | [diff] [blame] | 32 | /* The output buffer will be increased in chunks of DEFAULTALLOC bytes. */ |
| 33 | #define DEFAULTALLOC (16*1024) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 34 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 35 | static PyTypeObject Comptype; |
| 36 | static PyTypeObject Decomptype; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 37 | |
| 38 | static PyObject *ZlibError; |
| 39 | |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 40 | typedef struct |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 41 | { |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 42 | PyObject_HEAD |
| 43 | z_stream zst; |
| 44 | PyObject *unused_data; |
| 45 | PyObject *unconsumed_tail; |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 46 | char eof; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 47 | int is_initialised; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 48 | PyObject *zdict; |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 49 | #ifdef WITH_THREAD |
| 50 | PyThread_type_lock lock; |
| 51 | #endif |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 52 | } compobject; |
| 53 | |
Jeremy Hylton | 0965e08 | 2001-10-16 21:56:09 +0000 | [diff] [blame] | 54 | static void |
| 55 | zlib_error(z_stream zst, int err, char *msg) |
| 56 | { |
Nadeem Vawda | 524148a | 2011-08-28 11:26:46 +0200 | [diff] [blame] | 57 | const char *zmsg = Z_NULL; |
| 58 | /* In case of a version mismatch, zst.msg won't be initialized. |
| 59 | Check for this case first, before looking at zst.msg. */ |
| 60 | if (err == Z_VERSION_ERROR) |
| 61 | zmsg = "library version mismatch"; |
| 62 | if (zmsg == Z_NULL) |
| 63 | zmsg = zst.msg; |
Antoine Pitrou | 96f212b | 2010-05-11 23:49:58 +0000 | [diff] [blame] | 64 | if (zmsg == Z_NULL) { |
| 65 | switch (err) { |
| 66 | case Z_BUF_ERROR: |
| 67 | zmsg = "incomplete or truncated stream"; |
| 68 | break; |
| 69 | case Z_STREAM_ERROR: |
| 70 | zmsg = "inconsistent stream state"; |
| 71 | break; |
| 72 | case Z_DATA_ERROR: |
| 73 | zmsg = "invalid input data"; |
| 74 | break; |
| 75 | } |
| 76 | } |
| 77 | if (zmsg == Z_NULL) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 78 | PyErr_Format(ZlibError, "Error %d %s", err, msg); |
Jeremy Hylton | 0965e08 | 2001-10-16 21:56:09 +0000 | [diff] [blame] | 79 | else |
Antoine Pitrou | 96f212b | 2010-05-11 23:49:58 +0000 | [diff] [blame] | 80 | PyErr_Format(ZlibError, "Error %d %s: %.200s", err, msg, zmsg); |
Jeremy Hylton | 0965e08 | 2001-10-16 21:56:09 +0000 | [diff] [blame] | 81 | } |
| 82 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 83 | PyDoc_STRVAR(compressobj__doc__, |
Nadeem Vawda | 2180c97 | 2012-06-22 01:40:49 +0200 | [diff] [blame] | 84 | "compressobj(level=-1, method=DEFLATED, wbits=15, memlevel=8,\n" |
| 85 | " strategy=Z_DEFAULT_STRATEGY[, zdict])\n" |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 86 | " -- Return a compressor object.\n" |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 87 | "\n" |
Nadeem Vawda | 2180c97 | 2012-06-22 01:40:49 +0200 | [diff] [blame] | 88 | "level is the compression level (an integer in the range 0-9; default is 6).\n" |
| 89 | "Higher compression levels are slower, but produce smaller results.\n" |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 90 | "\n" |
Nadeem Vawda | 2180c97 | 2012-06-22 01:40:49 +0200 | [diff] [blame] | 91 | "method is the compression algorithm. If given, this must be DEFLATED.\n" |
| 92 | "\n" |
| 93 | "wbits is the base two logarithm of the window size (range: 8..15).\n" |
| 94 | "\n" |
| 95 | "memlevel controls the amount of memory used for internal compression state.\n" |
| 96 | "Valid values range from 1 to 9. Higher values result in higher memory usage,\n" |
| 97 | "faster compression, and smaller output.\n" |
| 98 | "\n" |
| 99 | "strategy is used to tune the compression algorithm. Possible values are\n" |
| 100 | "Z_DEFAULT_STRATEGY, Z_FILTERED, and Z_HUFFMAN_ONLY.\n" |
| 101 | "\n" |
| 102 | "zdict is the predefined compression dictionary - a sequence of bytes\n" |
| 103 | "containing subsequences that are likely to occur in the input data."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 104 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 105 | PyDoc_STRVAR(decompressobj__doc__, |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 106 | "decompressobj([wbits[, zdict]]) -- Return a decompressor object.\n" |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 107 | "\n" |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 108 | "Optional arg wbits is the window buffer size.\n" |
| 109 | "\n" |
| 110 | "Optional arg zdict is the predefined compression dictionary. This must be\n" |
| 111 | "the same dictionary as used by the compressor that produced the input data."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 112 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 113 | static compobject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 114 | newcompobject(PyTypeObject *type) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 115 | { |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 116 | compobject *self; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 117 | self = PyObject_New(compobject, type); |
| 118 | if (self == NULL) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 119 | return NULL; |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 120 | self->eof = 0; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 121 | self->is_initialised = 0; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 122 | self->zdict = NULL; |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 123 | self->unused_data = PyBytes_FromStringAndSize("", 0); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 124 | if (self->unused_data == NULL) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 125 | Py_DECREF(self); |
| 126 | return NULL; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 127 | } |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 128 | self->unconsumed_tail = PyBytes_FromStringAndSize("", 0); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 129 | if (self->unconsumed_tail == NULL) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 130 | Py_DECREF(self); |
| 131 | return NULL; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 132 | } |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 133 | #ifdef WITH_THREAD |
| 134 | self->lock = PyThread_allocate_lock(); |
| 135 | #endif |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 136 | return self; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 137 | } |
| 138 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 139 | PyDoc_STRVAR(compress__doc__, |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 140 | "compress(string[, level]) -- Returned compressed string.\n" |
| 141 | "\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 142 | "Optional arg level is the compression level, in 1-9."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 143 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 144 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 145 | PyZlib_compress(PyObject *self, PyObject *args) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 146 | { |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 147 | PyObject *ReturnVal = NULL; |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 148 | Py_buffer pinput; |
Nadeem Vawda | 1b8a417 | 2011-05-14 22:26:55 +0200 | [diff] [blame] | 149 | Byte *input, *output = NULL; |
| 150 | unsigned int length; |
| 151 | int level=Z_DEFAULT_COMPRESSION, err; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 152 | z_stream zst; |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 153 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 154 | /* require Python string object, optional 'level' arg */ |
Antoine Pitrou | c8428d3 | 2009-12-14 18:23:30 +0000 | [diff] [blame] | 155 | if (!PyArg_ParseTuple(args, "y*|i:compress", &pinput, &level)) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 156 | return NULL; |
Nadeem Vawda | 1b8a417 | 2011-05-14 22:26:55 +0200 | [diff] [blame] | 157 | |
| 158 | if (pinput.len > UINT_MAX) { |
| 159 | PyErr_SetString(PyExc_OverflowError, |
| 160 | "Size does not fit in an unsigned int"); |
| 161 | goto error; |
| 162 | } |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 163 | input = pinput.buf; |
| 164 | length = pinput.len; |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 165 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 166 | zst.avail_out = length + length/1000 + 12 + 1; |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 167 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 168 | output = (Byte*)malloc(zst.avail_out); |
| 169 | if (output == NULL) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 170 | PyErr_SetString(PyExc_MemoryError, |
| 171 | "Can't allocate memory to compress data"); |
Nadeem Vawda | 1b8a417 | 2011-05-14 22:26:55 +0200 | [diff] [blame] | 172 | goto error; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 173 | } |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 174 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 175 | /* Past the point of no return. From here on out, we need to make sure |
| 176 | we clean up mallocs & INCREFs. */ |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 177 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 178 | zst.zalloc = (alloc_func)NULL; |
| 179 | zst.zfree = (free_func)Z_NULL; |
| 180 | zst.next_out = (Byte *)output; |
| 181 | zst.next_in = (Byte *)input; |
| 182 | zst.avail_in = length; |
| 183 | err = deflateInit(&zst, level); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 184 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 185 | switch(err) { |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 186 | case(Z_OK): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 187 | break; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 188 | case(Z_MEM_ERROR): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 189 | PyErr_SetString(PyExc_MemoryError, |
| 190 | "Out of memory while compressing data"); |
| 191 | goto error; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 192 | case(Z_STREAM_ERROR): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 193 | PyErr_SetString(ZlibError, |
| 194 | "Bad compression level"); |
| 195 | goto error; |
Jeremy Hylton | 0965e08 | 2001-10-16 21:56:09 +0000 | [diff] [blame] | 196 | default: |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 197 | deflateEnd(&zst); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 198 | zlib_error(zst, err, "while compressing data"); |
| 199 | goto error; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 200 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 201 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 202 | Py_BEGIN_ALLOW_THREADS; |
| 203 | err = deflate(&zst, Z_FINISH); |
| 204 | Py_END_ALLOW_THREADS; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 205 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 206 | if (err != Z_STREAM_END) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 207 | zlib_error(zst, err, "while compressing data"); |
| 208 | deflateEnd(&zst); |
| 209 | goto error; |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 210 | } |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 211 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 212 | err=deflateEnd(&zst); |
| 213 | if (err == Z_OK) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 214 | ReturnVal = PyBytes_FromStringAndSize((char *)output, |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 215 | zst.total_out); |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 216 | else |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 217 | zlib_error(zst, err, "while finishing compression"); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 218 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 219 | error: |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 220 | PyBuffer_Release(&pinput); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 221 | free(output); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 222 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 223 | return ReturnVal; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 224 | } |
| 225 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 226 | PyDoc_STRVAR(decompress__doc__, |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 227 | "decompress(string[, wbits[, bufsize]]) -- Return decompressed string.\n" |
| 228 | "\n" |
| 229 | "Optional arg wbits is the window buffer size. Optional arg bufsize is\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 230 | "the initial output buffer size."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 231 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 232 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 233 | PyZlib_decompress(PyObject *self, PyObject *args) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 234 | { |
Nadeem Vawda | 1b8a417 | 2011-05-14 22:26:55 +0200 | [diff] [blame] | 235 | PyObject *result_str = NULL; |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 236 | Py_buffer pinput; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 237 | Byte *input; |
Nadeem Vawda | 1b8a417 | 2011-05-14 22:26:55 +0200 | [diff] [blame] | 238 | unsigned int length; |
| 239 | int err; |
Guido van Rossum | cd4d452 | 2007-11-22 00:30:02 +0000 | [diff] [blame] | 240 | int wsize=DEF_WBITS; |
| 241 | Py_ssize_t r_strlen=DEFAULTALLOC; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 242 | z_stream zst; |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 243 | |
Antoine Pitrou | c8428d3 | 2009-12-14 18:23:30 +0000 | [diff] [blame] | 244 | if (!PyArg_ParseTuple(args, "y*|in:decompress", |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 245 | &pinput, &wsize, &r_strlen)) |
| 246 | return NULL; |
Nadeem Vawda | 1b8a417 | 2011-05-14 22:26:55 +0200 | [diff] [blame] | 247 | |
| 248 | if (pinput.len > UINT_MAX) { |
| 249 | PyErr_SetString(PyExc_OverflowError, |
| 250 | "Size does not fit in an unsigned int"); |
| 251 | goto error; |
| 252 | } |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 253 | input = pinput.buf; |
| 254 | length = pinput.len; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 255 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 256 | if (r_strlen <= 0) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 257 | r_strlen = 1; |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 258 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 259 | zst.avail_in = length; |
| 260 | zst.avail_out = r_strlen; |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 261 | |
Nadeem Vawda | 1b8a417 | 2011-05-14 22:26:55 +0200 | [diff] [blame] | 262 | if (!(result_str = PyBytes_FromStringAndSize(NULL, r_strlen))) |
| 263 | goto error; |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 264 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 265 | zst.zalloc = (alloc_func)NULL; |
| 266 | zst.zfree = (free_func)Z_NULL; |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 267 | zst.next_out = (Byte *)PyBytes_AS_STRING(result_str); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 268 | zst.next_in = (Byte *)input; |
| 269 | err = inflateInit2(&zst, wsize); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 270 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 271 | switch(err) { |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 272 | case(Z_OK): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 273 | break; |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 274 | case(Z_MEM_ERROR): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 275 | PyErr_SetString(PyExc_MemoryError, |
| 276 | "Out of memory while decompressing data"); |
| 277 | goto error; |
Jeremy Hylton | 0965e08 | 2001-10-16 21:56:09 +0000 | [diff] [blame] | 278 | default: |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 279 | inflateEnd(&zst); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 280 | zlib_error(zst, err, "while preparing to decompress data"); |
| 281 | goto error; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 282 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 283 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 284 | do { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 285 | Py_BEGIN_ALLOW_THREADS |
| 286 | err=inflate(&zst, Z_FINISH); |
| 287 | Py_END_ALLOW_THREADS |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 288 | |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 289 | switch(err) { |
| 290 | case(Z_STREAM_END): |
| 291 | break; |
| 292 | case(Z_BUF_ERROR): |
| 293 | /* |
| 294 | * If there is at least 1 byte of room according to zst.avail_out |
| 295 | * and we get this error, assume that it means zlib cannot |
| 296 | * process the inflate call() due to an error in the data. |
| 297 | */ |
| 298 | if (zst.avail_out > 0) { |
Antoine Pitrou | 96f212b | 2010-05-11 23:49:58 +0000 | [diff] [blame] | 299 | zlib_error(zst, err, "while decompressing data"); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 300 | inflateEnd(&zst); |
| 301 | goto error; |
| 302 | } |
| 303 | /* fall through */ |
| 304 | case(Z_OK): |
| 305 | /* need more memory */ |
| 306 | if (_PyBytes_Resize(&result_str, r_strlen << 1) < 0) { |
| 307 | inflateEnd(&zst); |
| 308 | goto error; |
| 309 | } |
| 310 | zst.next_out = |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 311 | (unsigned char *)PyBytes_AS_STRING(result_str) + r_strlen; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 312 | zst.avail_out = r_strlen; |
| 313 | r_strlen = r_strlen << 1; |
| 314 | break; |
| 315 | default: |
| 316 | inflateEnd(&zst); |
| 317 | zlib_error(zst, err, "while decompressing data"); |
| 318 | goto error; |
| 319 | } |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 320 | } while (err != Z_STREAM_END); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 321 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 322 | err = inflateEnd(&zst); |
| 323 | if (err != Z_OK) { |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 324 | zlib_error(zst, err, "while finishing decompression"); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 325 | goto error; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 326 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 327 | |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 328 | if (_PyBytes_Resize(&result_str, zst.total_out) < 0) |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 329 | goto error; |
| 330 | |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 331 | PyBuffer_Release(&pinput); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 332 | return result_str; |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 333 | |
| 334 | error: |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 335 | PyBuffer_Release(&pinput); |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 336 | Py_XDECREF(result_str); |
| 337 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | static PyObject * |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 341 | PyZlib_compressobj(PyObject *selfptr, PyObject *args, PyObject *kwargs) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 342 | { |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 343 | compobject *self; |
| 344 | int level=Z_DEFAULT_COMPRESSION, method=DEFLATED; |
| 345 | int wbits=MAX_WBITS, memLevel=DEF_MEM_LEVEL, strategy=0, err; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 346 | Py_buffer zdict; |
| 347 | static char *kwlist[] = {"level", "method", "wbits", |
| 348 | "memLevel", "strategy", "zdict", NULL}; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 349 | |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 350 | zdict.buf = NULL; /* Sentinel, so we can tell whether zdict was supplied. */ |
| 351 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|iiiiiy*:compressobj", |
| 352 | kwlist, &level, &method, &wbits, |
| 353 | &memLevel, &strategy, &zdict)) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 354 | return NULL; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 355 | |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 356 | self = newcompobject(&Comptype); |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 357 | if (self==NULL) |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 358 | goto error; |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 359 | self->zst.zalloc = (alloc_func)NULL; |
| 360 | self->zst.zfree = (free_func)Z_NULL; |
Andrew M. Kuchling | 3b585b3 | 2004-12-28 20:10:48 +0000 | [diff] [blame] | 361 | self->zst.next_in = NULL; |
| 362 | self->zst.avail_in = 0; |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 363 | err = deflateInit2(&self->zst, level, method, wbits, memLevel, strategy); |
| 364 | switch(err) { |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 365 | case (Z_OK): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 366 | self->is_initialised = 1; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 367 | if (zdict.buf == NULL) { |
| 368 | goto success; |
| 369 | } else { |
| 370 | err = deflateSetDictionary(&self->zst, zdict.buf, zdict.len); |
| 371 | switch (err) { |
| 372 | case (Z_OK): |
| 373 | goto success; |
| 374 | case (Z_STREAM_ERROR): |
| 375 | PyErr_SetString(PyExc_ValueError, "Invalid dictionary"); |
| 376 | goto error; |
| 377 | default: |
| 378 | PyErr_SetString(PyExc_ValueError, "deflateSetDictionary()"); |
| 379 | goto error; |
| 380 | } |
| 381 | } |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 382 | case (Z_MEM_ERROR): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 383 | PyErr_SetString(PyExc_MemoryError, |
| 384 | "Can't allocate memory for compression object"); |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 385 | goto error; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 386 | case(Z_STREAM_ERROR): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 387 | PyErr_SetString(PyExc_ValueError, "Invalid initialization option"); |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 388 | goto error; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 389 | default: |
| 390 | zlib_error(self->zst, err, "while creating compression object"); |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 391 | goto error; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 392 | } |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 393 | |
| 394 | error: |
| 395 | Py_XDECREF(self); |
| 396 | self = NULL; |
| 397 | success: |
| 398 | if (zdict.buf != NULL) |
| 399 | PyBuffer_Release(&zdict); |
| 400 | return (PyObject*)self; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | static PyObject * |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 404 | PyZlib_decompressobj(PyObject *selfptr, PyObject *args, PyObject *kwargs) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 405 | { |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 406 | static char *kwlist[] = {"wbits", "zdict", NULL}; |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 407 | int wbits=DEF_WBITS, err; |
| 408 | compobject *self; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 409 | PyObject *zdict=NULL; |
| 410 | |
| 411 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|iO:decompressobj", |
| 412 | kwlist, &wbits, &zdict)) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 413 | return NULL; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 414 | if (zdict != NULL && !PyObject_CheckBuffer(zdict)) { |
| 415 | PyErr_SetString(PyExc_TypeError, |
| 416 | "zdict argument must support the buffer protocol"); |
| 417 | return NULL; |
| 418 | } |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 419 | |
| 420 | self = newcompobject(&Decomptype); |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 421 | if (self == NULL) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 422 | return(NULL); |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 423 | self->zst.zalloc = (alloc_func)NULL; |
| 424 | self->zst.zfree = (free_func)Z_NULL; |
Andrew M. Kuchling | 3b585b3 | 2004-12-28 20:10:48 +0000 | [diff] [blame] | 425 | self->zst.next_in = NULL; |
| 426 | self->zst.avail_in = 0; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 427 | if (zdict != NULL) { |
| 428 | Py_INCREF(zdict); |
| 429 | self->zdict = zdict; |
| 430 | } |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 431 | err = inflateInit2(&self->zst, wbits); |
| 432 | switch(err) { |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 433 | case (Z_OK): |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 434 | self->is_initialised = 1; |
| 435 | return (PyObject*)self; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 436 | case(Z_STREAM_ERROR): |
Andrew M. Kuchling | 1c7aaa2 | 1999-01-29 21:49:34 +0000 | [diff] [blame] | 437 | Py_DECREF(self); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 438 | PyErr_SetString(PyExc_ValueError, "Invalid initialization option"); |
| 439 | return NULL; |
| 440 | case (Z_MEM_ERROR): |
| 441 | Py_DECREF(self); |
| 442 | PyErr_SetString(PyExc_MemoryError, |
| 443 | "Can't allocate memory for decompression object"); |
| 444 | return NULL; |
| 445 | default: |
| 446 | zlib_error(self->zst, err, "while creating decompression object"); |
| 447 | Py_DECREF(self); |
| 448 | return NULL; |
Jeremy Hylton | 49900000 | 2001-10-16 21:59:35 +0000 | [diff] [blame] | 449 | } |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 450 | } |
| 451 | |
| 452 | static void |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 453 | Dealloc(compobject *self) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 454 | { |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 455 | #ifdef WITH_THREAD |
| 456 | PyThread_free_lock(self->lock); |
| 457 | #endif |
Andrew M. Kuchling | b95227d | 1999-03-25 21:21:08 +0000 | [diff] [blame] | 458 | Py_XDECREF(self->unused_data); |
Jeremy Hylton | 511e2ca | 2001-10-16 20:39:49 +0000 | [diff] [blame] | 459 | Py_XDECREF(self->unconsumed_tail); |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 460 | Py_XDECREF(self->zdict); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 461 | PyObject_Del(self); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | static void |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 465 | Comp_dealloc(compobject *self) |
| 466 | { |
| 467 | if (self->is_initialised) |
| 468 | deflateEnd(&self->zst); |
| 469 | Dealloc(self); |
| 470 | } |
| 471 | |
| 472 | static void |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 473 | Decomp_dealloc(compobject *self) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 474 | { |
Andrew M. Kuchling | 9aff4a2 | 2001-02-21 02:15:56 +0000 | [diff] [blame] | 475 | if (self->is_initialised) |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 476 | inflateEnd(&self->zst); |
| 477 | Dealloc(self); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 478 | } |
| 479 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 480 | PyDoc_STRVAR(comp_compress__doc__, |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 481 | "compress(data) -- Return a string containing data compressed.\n" |
| 482 | "\n" |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 483 | "After calling this function, some of the input data may still\n" |
| 484 | "be stored in internal buffers for later processing.\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 485 | "Call the flush() method to clear these buffers."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 486 | |
| 487 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 488 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 489 | PyZlib_objcompress(compobject *self, PyObject *args) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 490 | { |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 491 | int err; |
| 492 | unsigned int inplen; |
Antoine Pitrou | 4b3fe14 | 2010-05-07 17:08:54 +0000 | [diff] [blame] | 493 | Py_ssize_t length = DEFAULTALLOC; |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 494 | PyObject *RetVal = NULL; |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 495 | Py_buffer pinput; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 496 | Byte *input; |
| 497 | unsigned long start_total_out; |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 498 | |
Antoine Pitrou | c8428d3 | 2009-12-14 18:23:30 +0000 | [diff] [blame] | 499 | if (!PyArg_ParseTuple(args, "y*:compress", &pinput)) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 500 | return NULL; |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 501 | if (pinput.len > UINT_MAX) { |
| 502 | PyErr_SetString(PyExc_OverflowError, |
| 503 | "Size does not fit in an unsigned int"); |
| 504 | goto error_outer; |
| 505 | } |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 506 | input = pinput.buf; |
| 507 | inplen = pinput.len; |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 508 | |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 509 | if (!(RetVal = PyBytes_FromStringAndSize(NULL, length))) |
| 510 | goto error_outer; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 511 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 512 | ENTER_ZLIB(self); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 513 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 514 | start_total_out = self->zst.total_out; |
| 515 | self->zst.avail_in = inplen; |
| 516 | self->zst.next_in = input; |
Andrew M. Kuchling | 9aff4a2 | 2001-02-21 02:15:56 +0000 | [diff] [blame] | 517 | self->zst.avail_out = length; |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 518 | self->zst.next_out = (unsigned char *)PyBytes_AS_STRING(RetVal); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 519 | |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 520 | Py_BEGIN_ALLOW_THREADS |
Andrew M. Kuchling | 9aff4a2 | 2001-02-21 02:15:56 +0000 | [diff] [blame] | 521 | err = deflate(&(self->zst), Z_NO_FLUSH); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 522 | Py_END_ALLOW_THREADS |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 523 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 524 | /* while Z_OK and the output buffer is full, there might be more output, |
| 525 | so extend the output buffer and try again */ |
| 526 | while (err == Z_OK && self->zst.avail_out == 0) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 527 | if (_PyBytes_Resize(&RetVal, length << 1) < 0) { |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 528 | Py_DECREF(RetVal); |
| 529 | RetVal = NULL; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 530 | goto error; |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 531 | } |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 532 | self->zst.next_out = |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 533 | (unsigned char *)PyBytes_AS_STRING(RetVal) + length; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 534 | self->zst.avail_out = length; |
| 535 | length = length << 1; |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 536 | |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 537 | Py_BEGIN_ALLOW_THREADS |
| 538 | err = deflate(&(self->zst), Z_NO_FLUSH); |
| 539 | Py_END_ALLOW_THREADS |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 540 | } |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 541 | /* We will only get Z_BUF_ERROR if the output buffer was full but |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 542 | there wasn't more output when we tried again, so it is not an error |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 543 | condition. |
| 544 | */ |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 545 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 546 | if (err != Z_OK && err != Z_BUF_ERROR) { |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 547 | zlib_error(self->zst, err, "while compressing data"); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 548 | Py_DECREF(RetVal); |
| 549 | RetVal = NULL; |
| 550 | goto error; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 551 | } |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 552 | if (_PyBytes_Resize(&RetVal, self->zst.total_out - start_total_out) < 0) { |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 553 | Py_DECREF(RetVal); |
| 554 | RetVal = NULL; |
| 555 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 556 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 557 | error: |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 558 | LEAVE_ZLIB(self); |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 559 | error_outer: |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 560 | PyBuffer_Release(&pinput); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 561 | return RetVal; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 562 | } |
| 563 | |
Nadeem Vawda | ee7889d | 2012-11-11 02:14:36 +0100 | [diff] [blame] | 564 | /* Helper for objdecompress() and unflush(). Saves any unconsumed input data in |
| 565 | self->unused_data or self->unconsumed_tail, as appropriate. */ |
| 566 | static int |
| 567 | save_unconsumed_input(compobject *self, int err) |
| 568 | { |
| 569 | if (err == Z_STREAM_END) { |
| 570 | /* The end of the compressed data has been reached. Store the leftover |
| 571 | input data in self->unused_data. */ |
| 572 | if (self->zst.avail_in > 0) { |
| 573 | Py_ssize_t old_size = PyBytes_GET_SIZE(self->unused_data); |
| 574 | Py_ssize_t new_size; |
| 575 | PyObject *new_data; |
| 576 | if (self->zst.avail_in > PY_SSIZE_T_MAX - old_size) { |
| 577 | PyErr_NoMemory(); |
| 578 | return -1; |
| 579 | } |
| 580 | new_size = old_size + self->zst.avail_in; |
| 581 | new_data = PyBytes_FromStringAndSize(NULL, new_size); |
| 582 | if (new_data == NULL) |
| 583 | return -1; |
| 584 | Py_MEMCPY(PyBytes_AS_STRING(new_data), |
| 585 | PyBytes_AS_STRING(self->unused_data), old_size); |
| 586 | Py_MEMCPY(PyBytes_AS_STRING(new_data) + old_size, |
| 587 | self->zst.next_in, self->zst.avail_in); |
| 588 | Py_DECREF(self->unused_data); |
| 589 | self->unused_data = new_data; |
| 590 | self->zst.avail_in = 0; |
| 591 | } |
| 592 | } |
| 593 | if (self->zst.avail_in > 0 || PyBytes_GET_SIZE(self->unconsumed_tail)) { |
| 594 | /* This code handles two distinct cases: |
| 595 | 1. Output limit was reached. Save leftover input in unconsumed_tail. |
| 596 | 2. All input data was consumed. Clear unconsumed_tail. */ |
| 597 | PyObject *new_data = PyBytes_FromStringAndSize( |
| 598 | (char *)self->zst.next_in, self->zst.avail_in); |
| 599 | if (new_data == NULL) |
| 600 | return -1; |
| 601 | Py_DECREF(self->unconsumed_tail); |
| 602 | self->unconsumed_tail = new_data; |
| 603 | } |
| 604 | return 0; |
| 605 | } |
| 606 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 607 | PyDoc_STRVAR(decomp_decompress__doc__, |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 608 | "decompress(data, max_length) -- Return a string containing the decompressed\n" |
| 609 | "version of the data.\n" |
| 610 | "\n" |
| 611 | "After calling this function, some of the input data may still be stored in\n" |
| 612 | "internal buffers for later processing.\n" |
Jeremy Hylton | 511e2ca | 2001-10-16 20:39:49 +0000 | [diff] [blame] | 613 | "Call the flush() method to clear these buffers.\n" |
| 614 | "If the max_length parameter is specified then the return value will be\n" |
| 615 | "no longer than max_length. Unconsumed input data will be stored in\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 616 | "the unconsumed_tail attribute."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 617 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 618 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 619 | PyZlib_objdecompress(compobject *self, PyObject *args) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 620 | { |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 621 | int err, max_length = 0; |
| 622 | unsigned int inplen; |
Antoine Pitrou | 4b3fe14 | 2010-05-07 17:08:54 +0000 | [diff] [blame] | 623 | Py_ssize_t old_length, length = DEFAULTALLOC; |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 624 | PyObject *RetVal = NULL; |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 625 | Py_buffer pinput; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 626 | Byte *input; |
| 627 | unsigned long start_total_out; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 628 | |
Antoine Pitrou | c8428d3 | 2009-12-14 18:23:30 +0000 | [diff] [blame] | 629 | if (!PyArg_ParseTuple(args, "y*|i:decompress", &pinput, |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 630 | &max_length)) |
| 631 | return NULL; |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 632 | if (pinput.len > UINT_MAX) { |
| 633 | PyErr_SetString(PyExc_OverflowError, |
| 634 | "Size does not fit in an unsigned int"); |
| 635 | goto error_outer; |
| 636 | } |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 637 | input = pinput.buf; |
| 638 | inplen = pinput.len; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 639 | if (max_length < 0) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 640 | PyErr_SetString(PyExc_ValueError, |
| 641 | "max_length must be greater than zero"); |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 642 | goto error_outer; |
Andrew M. Kuchling | 9aff4a2 | 2001-02-21 02:15:56 +0000 | [diff] [blame] | 643 | } |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 644 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 645 | /* limit amount of data allocated to max_length */ |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 646 | if (max_length && length > max_length) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 647 | length = max_length; |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 648 | if (!(RetVal = PyBytes_FromStringAndSize(NULL, length))) |
| 649 | goto error_outer; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 650 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 651 | ENTER_ZLIB(self); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 652 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 653 | start_total_out = self->zst.total_out; |
| 654 | self->zst.avail_in = inplen; |
| 655 | self->zst.next_in = input; |
| 656 | self->zst.avail_out = length; |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 657 | self->zst.next_out = (unsigned char *)PyBytes_AS_STRING(RetVal); |
Jeremy Hylton | 511e2ca | 2001-10-16 20:39:49 +0000 | [diff] [blame] | 658 | |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 659 | Py_BEGIN_ALLOW_THREADS |
Andrew M. Kuchling | 9aff4a2 | 2001-02-21 02:15:56 +0000 | [diff] [blame] | 660 | err = inflate(&(self->zst), Z_SYNC_FLUSH); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 661 | Py_END_ALLOW_THREADS |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 662 | |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 663 | if (err == Z_NEED_DICT && self->zdict != NULL) { |
| 664 | Py_buffer zdict_buf; |
| 665 | if (PyObject_GetBuffer(self->zdict, &zdict_buf, PyBUF_SIMPLE) == -1) { |
| 666 | Py_DECREF(RetVal); |
| 667 | RetVal = NULL; |
| 668 | goto error; |
| 669 | } |
| 670 | err = inflateSetDictionary(&(self->zst), zdict_buf.buf, zdict_buf.len); |
| 671 | PyBuffer_Release(&zdict_buf); |
| 672 | if (err != Z_OK) { |
| 673 | zlib_error(self->zst, err, "while decompressing data"); |
| 674 | Py_DECREF(RetVal); |
| 675 | RetVal = NULL; |
| 676 | goto error; |
| 677 | } |
Nadeem Vawda | cf5e1d8 | 2012-06-22 00:35:57 +0200 | [diff] [blame] | 678 | /* Repeat the call to inflate. */ |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 679 | Py_BEGIN_ALLOW_THREADS |
| 680 | err = inflate(&(self->zst), Z_SYNC_FLUSH); |
| 681 | Py_END_ALLOW_THREADS |
| 682 | } |
| 683 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 684 | /* While Z_OK and the output buffer is full, there might be more output. |
| 685 | So extend the output buffer and try again. |
| 686 | */ |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 687 | while (err == Z_OK && self->zst.avail_out == 0) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 688 | /* If max_length set, don't continue decompressing if we've already |
| 689 | reached the limit. |
| 690 | */ |
| 691 | if (max_length && length >= max_length) |
| 692 | break; |
Jeremy Hylton | 511e2ca | 2001-10-16 20:39:49 +0000 | [diff] [blame] | 693 | |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 694 | /* otherwise, ... */ |
| 695 | old_length = length; |
| 696 | length = length << 1; |
| 697 | if (max_length && length > max_length) |
| 698 | length = max_length; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 699 | |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 700 | if (_PyBytes_Resize(&RetVal, length) < 0) { |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 701 | Py_DECREF(RetVal); |
| 702 | RetVal = NULL; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 703 | goto error; |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 704 | } |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 705 | self->zst.next_out = |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 706 | (unsigned char *)PyBytes_AS_STRING(RetVal) + old_length; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 707 | self->zst.avail_out = length - old_length; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 708 | |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 709 | Py_BEGIN_ALLOW_THREADS |
| 710 | err = inflate(&(self->zst), Z_SYNC_FLUSH); |
| 711 | Py_END_ALLOW_THREADS |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 712 | } |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 713 | |
Nadeem Vawda | ee7889d | 2012-11-11 02:14:36 +0100 | [diff] [blame] | 714 | if (save_unconsumed_input(self, err) < 0) { |
Nadeem Vawda | 7619e88 | 2011-05-14 14:05:20 +0200 | [diff] [blame] | 715 | Py_DECREF(RetVal); |
| 716 | RetVal = NULL; |
| 717 | goto error; |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 718 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 719 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 720 | if (err == Z_STREAM_END) { |
Nadeem Vawda | dd1253a | 2012-11-11 02:21:22 +0100 | [diff] [blame^] | 721 | /* This is the logical place to call inflateEnd, but the old behaviour |
| 722 | of only calling it on flush() is preserved. */ |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 723 | self->eof = 1; |
Nadeem Vawda | dd1253a | 2012-11-11 02:21:22 +0100 | [diff] [blame^] | 724 | } else if (err != Z_OK && err != Z_BUF_ERROR) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 725 | /* We will only get Z_BUF_ERROR if the output buffer was full |
| 726 | but there wasn't more output when we tried again, so it is |
| 727 | not an error condition. |
| 728 | */ |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 729 | zlib_error(self->zst, err, "while decompressing data"); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 730 | Py_DECREF(RetVal); |
| 731 | RetVal = NULL; |
| 732 | goto error; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 733 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 734 | |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 735 | if (_PyBytes_Resize(&RetVal, self->zst.total_out - start_total_out) < 0) { |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 736 | Py_DECREF(RetVal); |
| 737 | RetVal = NULL; |
| 738 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 739 | |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 740 | error: |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 741 | LEAVE_ZLIB(self); |
Nadeem Vawda | 0c3d96a | 2011-05-15 00:19:50 +0200 | [diff] [blame] | 742 | error_outer: |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 743 | PyBuffer_Release(&pinput); |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 744 | return RetVal; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 745 | } |
| 746 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 747 | PyDoc_STRVAR(comp_flush__doc__, |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 748 | "flush( [mode] ) -- Return a string containing any remaining compressed data.\n" |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 749 | "\n" |
| 750 | "mode can be one of the constants Z_SYNC_FLUSH, Z_FULL_FLUSH, Z_FINISH; the\n" |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 751 | "default value used when mode is not specified is Z_FINISH.\n" |
| 752 | "If mode == Z_FINISH, the compressor object can no longer be used after\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 753 | "calling the flush() method. Otherwise, more data can still be compressed."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 754 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 755 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 756 | PyZlib_flush(compobject *self, PyObject *args) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 757 | { |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 758 | int err, length = DEFAULTALLOC; |
| 759 | PyObject *RetVal; |
| 760 | int flushmode = Z_FINISH; |
| 761 | unsigned long start_total_out; |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 762 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 763 | if (!PyArg_ParseTuple(args, "|i:flush", &flushmode)) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 764 | return NULL; |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 765 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 766 | /* Flushing with Z_NO_FLUSH is a no-op, so there's no point in |
| 767 | doing any work at all; just return an empty string. */ |
| 768 | if (flushmode == Z_NO_FLUSH) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 769 | return PyBytes_FromStringAndSize(NULL, 0); |
Andrew M. Kuchling | 9aff4a2 | 2001-02-21 02:15:56 +0000 | [diff] [blame] | 770 | } |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 771 | |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 772 | if (!(RetVal = PyBytes_FromStringAndSize(NULL, length))) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 773 | return NULL; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 774 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 775 | ENTER_ZLIB(self); |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 776 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 777 | start_total_out = self->zst.total_out; |
| 778 | self->zst.avail_in = 0; |
Andrew M. Kuchling | 9aff4a2 | 2001-02-21 02:15:56 +0000 | [diff] [blame] | 779 | self->zst.avail_out = length; |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 780 | self->zst.next_out = (unsigned char *)PyBytes_AS_STRING(RetVal); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 781 | |
| 782 | Py_BEGIN_ALLOW_THREADS |
Andrew M. Kuchling | 9aff4a2 | 2001-02-21 02:15:56 +0000 | [diff] [blame] | 783 | err = deflate(&(self->zst), flushmode); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 784 | Py_END_ALLOW_THREADS |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 785 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 786 | /* while Z_OK and the output buffer is full, there might be more output, |
| 787 | so extend the output buffer and try again */ |
| 788 | while (err == Z_OK && self->zst.avail_out == 0) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 789 | if (_PyBytes_Resize(&RetVal, length << 1) < 0) { |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 790 | Py_DECREF(RetVal); |
| 791 | RetVal = NULL; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 792 | goto error; |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 793 | } |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 794 | self->zst.next_out = |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 795 | (unsigned char *)PyBytes_AS_STRING(RetVal) + length; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 796 | self->zst.avail_out = length; |
| 797 | length = length << 1; |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 798 | |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 799 | Py_BEGIN_ALLOW_THREADS |
| 800 | err = deflate(&(self->zst), flushmode); |
| 801 | Py_END_ALLOW_THREADS |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 802 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 803 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 804 | /* If flushmode is Z_FINISH, we also have to call deflateEnd() to free |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 805 | various data structures. Note we should only get Z_STREAM_END when |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 806 | flushmode is Z_FINISH, but checking both for safety*/ |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 807 | if (err == Z_STREAM_END && flushmode == Z_FINISH) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 808 | err = deflateEnd(&(self->zst)); |
| 809 | if (err != Z_OK) { |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 810 | zlib_error(self->zst, err, "while finishing compression"); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 811 | Py_DECREF(RetVal); |
| 812 | RetVal = NULL; |
| 813 | goto error; |
| 814 | } |
| 815 | else |
| 816 | self->is_initialised = 0; |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 817 | |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 818 | /* We will only get Z_BUF_ERROR if the output buffer was full |
| 819 | but there wasn't more output when we tried again, so it is |
| 820 | not an error condition. |
| 821 | */ |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 822 | } else if (err!=Z_OK && err!=Z_BUF_ERROR) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 823 | zlib_error(self->zst, err, "while flushing"); |
| 824 | Py_DECREF(RetVal); |
| 825 | RetVal = NULL; |
| 826 | goto error; |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 827 | } |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 828 | |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 829 | if (_PyBytes_Resize(&RetVal, self->zst.total_out - start_total_out) < 0) { |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 830 | Py_DECREF(RetVal); |
| 831 | RetVal = NULL; |
| 832 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 833 | |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 834 | error: |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 835 | LEAVE_ZLIB(self); |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 836 | |
| 837 | return RetVal; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 838 | } |
| 839 | |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 840 | #ifdef HAVE_ZLIB_COPY |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 841 | PyDoc_STRVAR(comp_copy__doc__, |
| 842 | "copy() -- Return a copy of the compression object."); |
| 843 | |
| 844 | static PyObject * |
| 845 | PyZlib_copy(compobject *self) |
| 846 | { |
| 847 | compobject *retval = NULL; |
| 848 | int err; |
| 849 | |
| 850 | retval = newcompobject(&Comptype); |
| 851 | if (!retval) return NULL; |
| 852 | |
| 853 | /* Copy the zstream state |
| 854 | * We use ENTER_ZLIB / LEAVE_ZLIB to make this thread-safe |
| 855 | */ |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 856 | ENTER_ZLIB(self); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 857 | err = deflateCopy(&retval->zst, &self->zst); |
| 858 | switch(err) { |
| 859 | case(Z_OK): |
| 860 | break; |
| 861 | case(Z_STREAM_ERROR): |
| 862 | PyErr_SetString(PyExc_ValueError, "Inconsistent stream state"); |
| 863 | goto error; |
| 864 | case(Z_MEM_ERROR): |
| 865 | PyErr_SetString(PyExc_MemoryError, |
| 866 | "Can't allocate memory for compression object"); |
| 867 | goto error; |
| 868 | default: |
| 869 | zlib_error(self->zst, err, "while copying compression object"); |
| 870 | goto error; |
| 871 | } |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 872 | Py_INCREF(self->unused_data); |
| 873 | Py_INCREF(self->unconsumed_tail); |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 874 | Py_XINCREF(self->zdict); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 875 | Py_XDECREF(retval->unused_data); |
| 876 | Py_XDECREF(retval->unconsumed_tail); |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 877 | Py_XDECREF(retval->zdict); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 878 | retval->unused_data = self->unused_data; |
| 879 | retval->unconsumed_tail = self->unconsumed_tail; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 880 | retval->zdict = self->zdict; |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 881 | retval->eof = self->eof; |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 882 | |
| 883 | /* Mark it as being initialized */ |
| 884 | retval->is_initialised = 1; |
| 885 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 886 | LEAVE_ZLIB(self); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 887 | return (PyObject *)retval; |
| 888 | |
| 889 | error: |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 890 | LEAVE_ZLIB(self); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 891 | Py_XDECREF(retval); |
| 892 | return NULL; |
| 893 | } |
| 894 | |
| 895 | PyDoc_STRVAR(decomp_copy__doc__, |
| 896 | "copy() -- Return a copy of the decompression object."); |
| 897 | |
| 898 | static PyObject * |
| 899 | PyZlib_uncopy(compobject *self) |
| 900 | { |
| 901 | compobject *retval = NULL; |
| 902 | int err; |
| 903 | |
| 904 | retval = newcompobject(&Decomptype); |
| 905 | if (!retval) return NULL; |
| 906 | |
| 907 | /* Copy the zstream state |
| 908 | * We use ENTER_ZLIB / LEAVE_ZLIB to make this thread-safe |
| 909 | */ |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 910 | ENTER_ZLIB(self); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 911 | err = inflateCopy(&retval->zst, &self->zst); |
| 912 | switch(err) { |
| 913 | case(Z_OK): |
| 914 | break; |
| 915 | case(Z_STREAM_ERROR): |
| 916 | PyErr_SetString(PyExc_ValueError, "Inconsistent stream state"); |
| 917 | goto error; |
| 918 | case(Z_MEM_ERROR): |
| 919 | PyErr_SetString(PyExc_MemoryError, |
| 920 | "Can't allocate memory for decompression object"); |
| 921 | goto error; |
| 922 | default: |
| 923 | zlib_error(self->zst, err, "while copying decompression object"); |
| 924 | goto error; |
| 925 | } |
| 926 | |
| 927 | Py_INCREF(self->unused_data); |
| 928 | Py_INCREF(self->unconsumed_tail); |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 929 | Py_XINCREF(self->zdict); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 930 | Py_XDECREF(retval->unused_data); |
| 931 | Py_XDECREF(retval->unconsumed_tail); |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 932 | Py_XDECREF(retval->zdict); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 933 | retval->unused_data = self->unused_data; |
| 934 | retval->unconsumed_tail = self->unconsumed_tail; |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 935 | retval->zdict = self->zdict; |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 936 | retval->eof = self->eof; |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 937 | |
| 938 | /* Mark it as being initialized */ |
| 939 | retval->is_initialised = 1; |
| 940 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 941 | LEAVE_ZLIB(self); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 942 | return (PyObject *)retval; |
| 943 | |
| 944 | error: |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 945 | LEAVE_ZLIB(self); |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 946 | Py_XDECREF(retval); |
| 947 | return NULL; |
| 948 | } |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 949 | #endif |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 950 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 951 | PyDoc_STRVAR(decomp_flush__doc__, |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 952 | "flush( [length] ) -- Return a string containing any remaining\n" |
| 953 | "decompressed data. length, if given, is the initial size of the\n" |
| 954 | "output buffer.\n" |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 955 | "\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 956 | "The decompressor object can no longer be used after this call."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 957 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 958 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 959 | PyZlib_unflush(compobject *self, PyObject *args) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 960 | { |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 961 | int err, length = DEFAULTALLOC; |
Jeremy Hylton | 9d620d0 | 2001-10-16 23:02:32 +0000 | [diff] [blame] | 962 | PyObject * retval = NULL; |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 963 | unsigned long start_total_out; |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 964 | |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 965 | if (!PyArg_ParseTuple(args, "|i:flush", &length)) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 966 | return NULL; |
Christian Heimes | 5e69685 | 2008-04-09 08:37:03 +0000 | [diff] [blame] | 967 | if (length <= 0) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 968 | PyErr_SetString(PyExc_ValueError, "length must be greater than zero"); |
| 969 | return NULL; |
Christian Heimes | 5e69685 | 2008-04-09 08:37:03 +0000 | [diff] [blame] | 970 | } |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 971 | if (!(retval = PyBytes_FromStringAndSize(NULL, length))) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 972 | return NULL; |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 973 | |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 974 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 975 | ENTER_ZLIB(self); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 976 | |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 977 | start_total_out = self->zst.total_out; |
| 978 | self->zst.avail_out = length; |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 979 | self->zst.next_out = (Byte *)PyBytes_AS_STRING(retval); |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 980 | |
| 981 | Py_BEGIN_ALLOW_THREADS |
| 982 | err = inflate(&(self->zst), Z_FINISH); |
| 983 | Py_END_ALLOW_THREADS |
| 984 | |
| 985 | /* while Z_OK and the output buffer is full, there might be more output, |
| 986 | so extend the output buffer and try again */ |
| 987 | while ((err == Z_OK || err == Z_BUF_ERROR) && self->zst.avail_out == 0) { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 988 | if (_PyBytes_Resize(&retval, length << 1) < 0) { |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 989 | Py_DECREF(retval); |
| 990 | retval = NULL; |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 991 | goto error; |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 992 | } |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 993 | self->zst.next_out = (Byte *)PyBytes_AS_STRING(retval) + length; |
| 994 | self->zst.avail_out = length; |
| 995 | length = length << 1; |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 996 | |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 997 | Py_BEGIN_ALLOW_THREADS |
| 998 | err = inflate(&(self->zst), Z_FINISH); |
| 999 | Py_END_ALLOW_THREADS |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1000 | } |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 1001 | |
Nadeem Vawda | ee7889d | 2012-11-11 02:14:36 +0100 | [diff] [blame] | 1002 | if (save_unconsumed_input(self, err) < 0) { |
| 1003 | Py_DECREF(retval); |
| 1004 | retval = NULL; |
| 1005 | goto error; |
| 1006 | } |
| 1007 | |
Nadeem Vawda | 3bf71c5 | 2011-08-13 15:42:50 +0200 | [diff] [blame] | 1008 | /* If at end of stream, clean up any memory allocated by zlib. */ |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 1009 | if (err == Z_STREAM_END) { |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 1010 | self->eof = 1; |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 1011 | self->is_initialised = 0; |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 1012 | err = inflateEnd(&(self->zst)); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1013 | if (err != Z_OK) { |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 1014 | zlib_error(self->zst, err, "while finishing decompression"); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1015 | Py_DECREF(retval); |
| 1016 | retval = NULL; |
| 1017 | goto error; |
| 1018 | } |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 1019 | } |
Nadeem Vawda | ee7889d | 2012-11-11 02:14:36 +0100 | [diff] [blame] | 1020 | |
Gregory P. Smith | 693fc46 | 2008-09-06 20:13:06 +0000 | [diff] [blame] | 1021 | if (_PyBytes_Resize(&retval, self->zst.total_out - start_total_out) < 0) { |
Guido van Rossum | 776152b | 2007-05-22 22:44:07 +0000 | [diff] [blame] | 1022 | Py_DECREF(retval); |
| 1023 | retval = NULL; |
| 1024 | } |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 1025 | |
| 1026 | error: |
| 1027 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1028 | LEAVE_ZLIB(self); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 1029 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1030 | return retval; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | static PyMethodDef comp_methods[] = |
| 1034 | { |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1035 | {"compress", (binaryfunc)PyZlib_objcompress, METH_VARARGS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1036 | comp_compress__doc__}, |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1037 | {"flush", (binaryfunc)PyZlib_flush, METH_VARARGS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1038 | comp_flush__doc__}, |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1039 | #ifdef HAVE_ZLIB_COPY |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 1040 | {"copy", (PyCFunction)PyZlib_copy, METH_NOARGS, |
| 1041 | comp_copy__doc__}, |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1042 | #endif |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1043 | {NULL, NULL} |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1044 | }; |
| 1045 | |
| 1046 | static PyMethodDef Decomp_methods[] = |
| 1047 | { |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1048 | {"decompress", (binaryfunc)PyZlib_objdecompress, METH_VARARGS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1049 | decomp_decompress__doc__}, |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1050 | {"flush", (binaryfunc)PyZlib_unflush, METH_VARARGS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1051 | decomp_flush__doc__}, |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1052 | #ifdef HAVE_ZLIB_COPY |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 1053 | {"copy", (PyCFunction)PyZlib_uncopy, METH_NOARGS, |
| 1054 | decomp_copy__doc__}, |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1055 | #endif |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1056 | {NULL, NULL} |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1057 | }; |
| 1058 | |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 1059 | #define COMP_OFF(x) offsetof(compobject, x) |
| 1060 | static PyMemberDef Decomp_members[] = { |
| 1061 | {"unused_data", T_OBJECT, COMP_OFF(unused_data), READONLY}, |
| 1062 | {"unconsumed_tail", T_OBJECT, COMP_OFF(unconsumed_tail), READONLY}, |
Nadeem Vawda | 1c38546 | 2011-08-13 15:22:40 +0200 | [diff] [blame] | 1063 | {"eof", T_BOOL, COMP_OFF(eof), READONLY}, |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 1064 | {NULL}, |
| 1065 | }; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1066 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1067 | PyDoc_STRVAR(adler32__doc__, |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 1068 | "adler32(string[, start]) -- Compute an Adler-32 checksum of string.\n" |
| 1069 | "\n" |
| 1070 | "An optional starting value can be specified. The returned checksum is\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1071 | "an integer."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 1072 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1073 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 1074 | PyZlib_adler32(PyObject *self, PyObject *args) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1075 | { |
Christian Heimes | cc47b05 | 2008-03-25 14:56:36 +0000 | [diff] [blame] | 1076 | unsigned int adler32val = 1; /* adler32(0L, Z_NULL, 0) */ |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1077 | Py_buffer pbuf; |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1078 | |
Antoine Pitrou | c8428d3 | 2009-12-14 18:23:30 +0000 | [diff] [blame] | 1079 | if (!PyArg_ParseTuple(args, "y*|I:adler32", &pbuf, &adler32val)) |
| 1080 | return NULL; |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1081 | /* Releasing the GIL for very small buffers is inefficient |
| 1082 | and may lower performance */ |
| 1083 | if (pbuf.len > 1024*5) { |
Antoine Pitrou | 9e719b6 | 2011-02-28 23:48:16 +0000 | [diff] [blame] | 1084 | unsigned char *buf = pbuf.buf; |
| 1085 | Py_ssize_t len = pbuf.len; |
| 1086 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1087 | Py_BEGIN_ALLOW_THREADS |
Antoine Pitrou | 9e719b6 | 2011-02-28 23:48:16 +0000 | [diff] [blame] | 1088 | /* Avoid truncation of length for very large buffers. adler32() takes |
| 1089 | length as an unsigned int, which may be narrower than Py_ssize_t. */ |
| 1090 | while (len > (size_t) UINT_MAX) { |
| 1091 | adler32val = adler32(adler32val, buf, UINT_MAX); |
| 1092 | buf += (size_t) UINT_MAX; |
| 1093 | len -= (size_t) UINT_MAX; |
| 1094 | } |
| 1095 | adler32val = adler32(adler32val, buf, len); |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1096 | Py_END_ALLOW_THREADS |
| 1097 | } else { |
Antoine Pitrou | c8428d3 | 2009-12-14 18:23:30 +0000 | [diff] [blame] | 1098 | adler32val = adler32(adler32val, pbuf.buf, pbuf.len); |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1099 | } |
| 1100 | PyBuffer_Release(&pbuf); |
Gregory P. Smith | 2727503 | 2008-03-20 06:20:09 +0000 | [diff] [blame] | 1101 | return PyLong_FromUnsignedLong(adler32val & 0xffffffffU); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1102 | } |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1103 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1104 | PyDoc_STRVAR(crc32__doc__, |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 1105 | "crc32(string[, start]) -- Compute a CRC-32 checksum of string.\n" |
| 1106 | "\n" |
| 1107 | "An optional starting value can be specified. The returned checksum is\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1108 | "an integer."); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1109 | |
| 1110 | static PyObject * |
Peter Schneider-Kamp | a788a7f | 2000-07-10 09:57:19 +0000 | [diff] [blame] | 1111 | PyZlib_crc32(PyObject *self, PyObject *args) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1112 | { |
Christian Heimes | cc47b05 | 2008-03-25 14:56:36 +0000 | [diff] [blame] | 1113 | unsigned int crc32val = 0; /* crc32(0L, Z_NULL, 0) */ |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 1114 | Py_buffer pbuf; |
| 1115 | int signed_val; |
Christian Heimes | cc47b05 | 2008-03-25 14:56:36 +0000 | [diff] [blame] | 1116 | |
Antoine Pitrou | c8428d3 | 2009-12-14 18:23:30 +0000 | [diff] [blame] | 1117 | if (!PyArg_ParseTuple(args, "y*|I:crc32", &pbuf, &crc32val)) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1118 | return NULL; |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1119 | /* Releasing the GIL for very small buffers is inefficient |
| 1120 | and may lower performance */ |
| 1121 | if (pbuf.len > 1024*5) { |
Antoine Pitrou | 9e719b6 | 2011-02-28 23:48:16 +0000 | [diff] [blame] | 1122 | unsigned char *buf = pbuf.buf; |
| 1123 | Py_ssize_t len = pbuf.len; |
| 1124 | |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1125 | Py_BEGIN_ALLOW_THREADS |
Antoine Pitrou | 9e719b6 | 2011-02-28 23:48:16 +0000 | [diff] [blame] | 1126 | /* Avoid truncation of length for very large buffers. crc32() takes |
| 1127 | length as an unsigned int, which may be narrower than Py_ssize_t. */ |
| 1128 | while (len > (size_t) UINT_MAX) { |
| 1129 | crc32val = crc32(crc32val, buf, UINT_MAX); |
| 1130 | buf += (size_t) UINT_MAX; |
| 1131 | len -= (size_t) UINT_MAX; |
| 1132 | } |
| 1133 | signed_val = crc32(crc32val, buf, len); |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1134 | Py_END_ALLOW_THREADS |
| 1135 | } else { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1136 | signed_val = crc32(crc32val, pbuf.buf, pbuf.len); |
Antoine Pitrou | 31f30b1 | 2009-01-02 17:34:35 +0000 | [diff] [blame] | 1137 | } |
Martin v. Löwis | 423be95 | 2008-08-13 15:53:07 +0000 | [diff] [blame] | 1138 | PyBuffer_Release(&pbuf); |
Christian Heimes | cc47b05 | 2008-03-25 14:56:36 +0000 | [diff] [blame] | 1139 | return PyLong_FromUnsignedLong(signed_val & 0xffffffffU); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1140 | } |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1141 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1142 | |
| 1143 | static PyMethodDef zlib_methods[] = |
| 1144 | { |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1145 | {"adler32", (PyCFunction)PyZlib_adler32, METH_VARARGS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1146 | adler32__doc__}, |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1147 | {"compress", (PyCFunction)PyZlib_compress, METH_VARARGS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1148 | compress__doc__}, |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 1149 | {"compressobj", (PyCFunction)PyZlib_compressobj, METH_VARARGS|METH_KEYWORDS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1150 | compressobj__doc__}, |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1151 | {"crc32", (PyCFunction)PyZlib_crc32, METH_VARARGS, |
| 1152 | crc32__doc__}, |
| 1153 | {"decompress", (PyCFunction)PyZlib_decompress, METH_VARARGS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1154 | decompress__doc__}, |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 1155 | {"decompressobj", (PyCFunction)PyZlib_decompressobj, METH_VARARGS|METH_KEYWORDS, |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1156 | decompressobj__doc__}, |
| 1157 | {NULL, NULL} |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1158 | }; |
| 1159 | |
Tim Peters | 0c32279 | 2002-07-17 16:49:03 +0000 | [diff] [blame] | 1160 | static PyTypeObject Comptype = { |
Martin v. Löwis | 9f2e346 | 2007-07-21 17:22:18 +0000 | [diff] [blame] | 1161 | PyVarObject_HEAD_INIT(0, 0) |
Guido van Rossum | 1464839 | 2001-12-08 18:02:58 +0000 | [diff] [blame] | 1162 | "zlib.Compress", |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1163 | sizeof(compobject), |
| 1164 | 0, |
| 1165 | (destructor)Comp_dealloc, /*tp_dealloc*/ |
| 1166 | 0, /*tp_print*/ |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 1167 | 0, /*tp_getattr*/ |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1168 | 0, /*tp_setattr*/ |
Mark Dickinson | e94c679 | 2009-02-02 20:36:42 +0000 | [diff] [blame] | 1169 | 0, /*tp_reserved*/ |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1170 | 0, /*tp_repr*/ |
| 1171 | 0, /*tp_as_number*/ |
| 1172 | 0, /*tp_as_sequence*/ |
| 1173 | 0, /*tp_as_mapping*/ |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 1174 | 0, /*tp_hash*/ |
| 1175 | 0, /*tp_call*/ |
| 1176 | 0, /*tp_str*/ |
| 1177 | 0, /*tp_getattro*/ |
| 1178 | 0, /*tp_setattro*/ |
| 1179 | 0, /*tp_as_buffer*/ |
| 1180 | Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
| 1181 | 0, /*tp_doc*/ |
| 1182 | 0, /*tp_traverse*/ |
| 1183 | 0, /*tp_clear*/ |
| 1184 | 0, /*tp_richcompare*/ |
| 1185 | 0, /*tp_weaklistoffset*/ |
| 1186 | 0, /*tp_iter*/ |
| 1187 | 0, /*tp_iternext*/ |
| 1188 | comp_methods, /*tp_methods*/ |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1189 | }; |
| 1190 | |
Tim Peters | 0c32279 | 2002-07-17 16:49:03 +0000 | [diff] [blame] | 1191 | static PyTypeObject Decomptype = { |
Martin v. Löwis | 9f2e346 | 2007-07-21 17:22:18 +0000 | [diff] [blame] | 1192 | PyVarObject_HEAD_INIT(0, 0) |
Guido van Rossum | 1464839 | 2001-12-08 18:02:58 +0000 | [diff] [blame] | 1193 | "zlib.Decompress", |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1194 | sizeof(compobject), |
| 1195 | 0, |
| 1196 | (destructor)Decomp_dealloc, /*tp_dealloc*/ |
| 1197 | 0, /*tp_print*/ |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 1198 | 0, /*tp_getattr*/ |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1199 | 0, /*tp_setattr*/ |
Mark Dickinson | e94c679 | 2009-02-02 20:36:42 +0000 | [diff] [blame] | 1200 | 0, /*tp_reserved*/ |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1201 | 0, /*tp_repr*/ |
| 1202 | 0, /*tp_as_number*/ |
| 1203 | 0, /*tp_as_sequence*/ |
| 1204 | 0, /*tp_as_mapping*/ |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 1205 | 0, /*tp_hash*/ |
| 1206 | 0, /*tp_call*/ |
| 1207 | 0, /*tp_str*/ |
| 1208 | 0, /*tp_getattro*/ |
| 1209 | 0, /*tp_setattro*/ |
| 1210 | 0, /*tp_as_buffer*/ |
| 1211 | Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
| 1212 | 0, /*tp_doc*/ |
| 1213 | 0, /*tp_traverse*/ |
| 1214 | 0, /*tp_clear*/ |
| 1215 | 0, /*tp_richcompare*/ |
| 1216 | 0, /*tp_weaklistoffset*/ |
| 1217 | 0, /*tp_iter*/ |
| 1218 | 0, /*tp_iternext*/ |
| 1219 | Decomp_methods, /*tp_methods*/ |
| 1220 | Decomp_members, /*tp_members*/ |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1221 | }; |
| 1222 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1223 | PyDoc_STRVAR(zlib_module_documentation, |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 1224 | "The functions in this module allow compression and decompression using the\n" |
| 1225 | "zlib library, which is based on GNU zip.\n" |
| 1226 | "\n" |
| 1227 | "adler32(string[, start]) -- Compute an Adler-32 checksum.\n" |
| 1228 | "compress(string[, level]) -- Compress string, with compression level in 1-9.\n" |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 1229 | "compressobj([level[, ...]]) -- Return a compressor object.\n" |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 1230 | "crc32(string[, start]) -- Compute a CRC-32 checksum.\n" |
Andrew M. Kuchling | 313a3e3 | 1999-12-20 22:13:38 +0000 | [diff] [blame] | 1231 | "decompress(string,[wbits],[bufsize]) -- Decompresses a compressed string.\n" |
Nadeem Vawda | fd8a838 | 2012-06-21 02:13:12 +0200 | [diff] [blame] | 1232 | "decompressobj([wbits[, zdict]]]) -- Return a decompressor object.\n" |
Tim Peters | adbd35b | 2001-10-17 04:16:15 +0000 | [diff] [blame] | 1233 | "\n" |
| 1234 | "'wbits' is window buffer size.\n" |
| 1235 | "Compressor objects support compress() and flush() methods; decompressor\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 1236 | "objects support decompress() and flush()."); |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 1237 | |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1238 | static struct PyModuleDef zlibmodule = { |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1239 | PyModuleDef_HEAD_INIT, |
| 1240 | "zlib", |
| 1241 | zlib_module_documentation, |
| 1242 | -1, |
| 1243 | zlib_methods, |
| 1244 | NULL, |
| 1245 | NULL, |
| 1246 | NULL, |
| 1247 | NULL |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1248 | }; |
| 1249 | |
Mark Hammond | 62b1ab1 | 2002-07-23 06:31:15 +0000 | [diff] [blame] | 1250 | PyMODINIT_FUNC |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 1251 | PyInit_zlib(void) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1252 | { |
Fred Drake | 4baedc1 | 2002-04-01 14:53:37 +0000 | [diff] [blame] | 1253 | PyObject *m, *ver; |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 1254 | if (PyType_Ready(&Comptype) < 0) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1255 | return NULL; |
Amaury Forgeot d'Arc | e43d33a | 2008-07-02 20:50:16 +0000 | [diff] [blame] | 1256 | if (PyType_Ready(&Decomptype) < 0) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1257 | return NULL; |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1258 | m = PyModule_Create(&zlibmodule); |
Neal Norwitz | 1ac754f | 2006-01-19 06:09:39 +0000 | [diff] [blame] | 1259 | if (m == NULL) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1260 | return NULL; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 1261 | |
Fred Drake | 4baedc1 | 2002-04-01 14:53:37 +0000 | [diff] [blame] | 1262 | ZlibError = PyErr_NewException("zlib.error", NULL, NULL); |
| 1263 | if (ZlibError != NULL) { |
| 1264 | Py_INCREF(ZlibError); |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1265 | PyModule_AddObject(m, "error", ZlibError); |
Fred Drake | 4baedc1 | 2002-04-01 14:53:37 +0000 | [diff] [blame] | 1266 | } |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1267 | PyModule_AddIntConstant(m, "MAX_WBITS", MAX_WBITS); |
| 1268 | PyModule_AddIntConstant(m, "DEFLATED", DEFLATED); |
| 1269 | PyModule_AddIntConstant(m, "DEF_MEM_LEVEL", DEF_MEM_LEVEL); |
| 1270 | PyModule_AddIntConstant(m, "Z_BEST_SPEED", Z_BEST_SPEED); |
| 1271 | PyModule_AddIntConstant(m, "Z_BEST_COMPRESSION", Z_BEST_COMPRESSION); |
| 1272 | PyModule_AddIntConstant(m, "Z_DEFAULT_COMPRESSION", Z_DEFAULT_COMPRESSION); |
| 1273 | PyModule_AddIntConstant(m, "Z_FILTERED", Z_FILTERED); |
| 1274 | PyModule_AddIntConstant(m, "Z_HUFFMAN_ONLY", Z_HUFFMAN_ONLY); |
| 1275 | PyModule_AddIntConstant(m, "Z_DEFAULT_STRATEGY", Z_DEFAULT_STRATEGY); |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1276 | |
Jeremy Hylton | 9714f99 | 2001-10-16 21:19:45 +0000 | [diff] [blame] | 1277 | PyModule_AddIntConstant(m, "Z_FINISH", Z_FINISH); |
| 1278 | PyModule_AddIntConstant(m, "Z_NO_FLUSH", Z_NO_FLUSH); |
| 1279 | PyModule_AddIntConstant(m, "Z_SYNC_FLUSH", Z_SYNC_FLUSH); |
| 1280 | PyModule_AddIntConstant(m, "Z_FULL_FLUSH", Z_FULL_FLUSH); |
Tim Peters | 977e540 | 2001-10-17 03:57:20 +0000 | [diff] [blame] | 1281 | |
Neal Norwitz | 53cbdaa | 2007-08-23 21:42:55 +0000 | [diff] [blame] | 1282 | ver = PyUnicode_FromString(ZLIB_VERSION); |
Fred Drake | 4baedc1 | 2002-04-01 14:53:37 +0000 | [diff] [blame] | 1283 | if (ver != NULL) |
Antoine Pitrou | 7f14f0d | 2010-05-09 16:14:21 +0000 | [diff] [blame] | 1284 | PyModule_AddObject(m, "ZLIB_VERSION", ver); |
Martin v. Löwis | 3bd8c1e | 2001-09-07 16:27:31 +0000 | [diff] [blame] | 1285 | |
Nadeem Vawda | 64d25dd | 2011-09-12 00:04:13 +0200 | [diff] [blame] | 1286 | ver = PyUnicode_FromString(zlibVersion()); |
| 1287 | if (ver != NULL) |
| 1288 | PyModule_AddObject(m, "ZLIB_RUNTIME_VERSION", ver); |
| 1289 | |
Guido van Rossum | 7d9ea50 | 2003-02-03 20:45:52 +0000 | [diff] [blame] | 1290 | PyModule_AddStringConstant(m, "__version__", "1.0"); |
| 1291 | |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1292 | return m; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1293 | } |