Mercurial > cpython-lru_cache-weakref
annotate Modules/zlibmodule.c @ 44825:ef859cd754a7 legacy-trunk
Fixed a wrong assumption in configure.in and Include/pyport.h. The is finite function is not called isfinite() but finite(). Sorry, my fault. :)
| author | Christian Heimes <christian@cheimes.de> |
|---|---|
| date | Sun, 20 Jan 2008 14:28:28 +0000 |
| parents | 26384b8180c7 |
| children | 710478a1977a |
| rev | line source |
|---|---|
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1 /* zlibmodule.c -- gzip-compatible data compression */ |
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Update URL. Fixes bug #468118.
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2 /* See http://www.gzip.org/zlib/ */ |
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Fix [ Bug #129293 ] zlib library used for binary win32 distribution can crash
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3 |
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4 /* Windows users: read Python's PCbuild\readme.txt */ |
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5 |
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6 |
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7 #include "Python.h" |
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8 #include "zlib.h" |
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9 |
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10 #ifdef WITH_THREAD |
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11 #include "pythread.h" |
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12 |
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13 /* #defs ripped off from _tkinter.c, even though the situation here is much |
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14 simpler, because we don't have to worry about waiting for Tcl |
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15 events! And, since zlib itself is threadsafe, we don't need to worry |
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16 about re-entering zlib functions. |
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17 |
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18 N.B. |
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19 |
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20 Since ENTER_ZLIB and LEAVE_ZLIB only need to be called on functions |
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21 that modify the components of preexisting de/compress objects, it |
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22 could prove to be a performance gain on multiprocessor machines if |
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23 there was an de/compress object-specific lock. However, for the |
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24 moment the ENTER_ZLIB and LEAVE_ZLIB calls are global for ALL |
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25 de/compress objects. |
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26 */ |
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27 |
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28 static PyThread_type_lock zlib_lock = NULL; /* initialized on module load */ |
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29 |
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30 #define ENTER_ZLIB \ |
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31 Py_BEGIN_ALLOW_THREADS \ |
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32 PyThread_acquire_lock(zlib_lock, 1); \ |
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33 Py_END_ALLOW_THREADS |
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34 |
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35 #define LEAVE_ZLIB \ |
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36 PyThread_release_lock(zlib_lock); |
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37 |
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38 #else |
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39 |
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40 #define ENTER_ZLIB |
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41 #define LEAVE_ZLIB |
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42 |
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43 #endif |
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44 |
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45 /* The following parameters are copied from zutil.h, version 0.95 */ |
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46 #define DEFLATED 8 |
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47 #if MAX_MEM_LEVEL >= 8 |
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48 # define DEF_MEM_LEVEL 8 |
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49 #else |
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50 # define DEF_MEM_LEVEL MAX_MEM_LEVEL |
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51 #endif |
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52 #define DEF_WBITS MAX_WBITS |
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53 |
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54 /* The output buffer will be increased in chunks of DEFAULTALLOC bytes. */ |
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55 #define DEFAULTALLOC (16*1024) |
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56 #define PyInit_zlib initzlib |
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57 |
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58 static PyTypeObject Comptype; |
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59 static PyTypeObject Decomptype; |
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60 |
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61 static PyObject *ZlibError; |
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62 |
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63 typedef struct |
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64 { |
| 20469 | 65 PyObject_HEAD |
| 66 z_stream zst; | |
| 67 PyObject *unused_data; | |
| 68 PyObject *unconsumed_tail; | |
| 69 int is_initialised; | |
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70 } compobject; |
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71 |
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72 static void |
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73 zlib_error(z_stream zst, int err, char *msg) |
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74 { |
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75 if (zst.msg == Z_NULL) |
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76 PyErr_Format(ZlibError, "Error %d %s", err, msg); |
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77 else |
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78 PyErr_Format(ZlibError, "Error %d %s: %.200s", err, msg, zst.msg); |
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79 } |
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80 |
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81 PyDoc_STRVAR(compressobj__doc__, |
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82 "compressobj([level]) -- Return a compressor object.\n" |
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83 "\n" |
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84 "Optional arg level is the compression level, in 1-9."); |
| 5722 | 85 |
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86 PyDoc_STRVAR(decompressobj__doc__, |
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87 "decompressobj([wbits]) -- Return a decompressor object.\n" |
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88 "\n" |
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89 "Optional arg wbits is the window buffer size."); |
| 5722 | 90 |
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91 static compobject * |
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92 newcompobject(PyTypeObject *type) |
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93 { |
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94 compobject *self; |
| 20469 | 95 self = PyObject_New(compobject, type); |
| 96 if (self == NULL) | |
| 97 return NULL; | |
| 98 self->is_initialised = 0; | |
| 99 self->unused_data = PyString_FromString(""); | |
| 100 if (self->unused_data == NULL) { | |
| 101 Py_DECREF(self); | |
| 102 return NULL; | |
| 103 } | |
| 104 self->unconsumed_tail = PyString_FromString(""); | |
| 105 if (self->unconsumed_tail == NULL) { | |
| 106 Py_DECREF(self); | |
| 107 return NULL; | |
| 108 } | |
| 109 return self; | |
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110 } |
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111 |
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112 PyDoc_STRVAR(compress__doc__, |
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113 "compress(string[, level]) -- Returned compressed string.\n" |
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114 "\n" |
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115 "Optional arg level is the compression level, in 1-9."); |
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117 static PyObject * |
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118 PyZlib_compress(PyObject *self, PyObject *args) |
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119 { |
| 20469 | 120 PyObject *ReturnVal = NULL; |
| 121 Byte *input, *output; | |
| 122 int length, level=Z_DEFAULT_COMPRESSION, err; | |
| 123 z_stream zst; | |
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124 |
| 20469 | 125 /* require Python string object, optional 'level' arg */ |
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126 if (!PyArg_ParseTuple(args, "s#|i:compress", &input, &length, &level)) |
| 20469 | 127 return NULL; |
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128 |
| 20469 | 129 zst.avail_out = length + length/1000 + 12 + 1; |
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130 |
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131 output = (Byte*)malloc(zst.avail_out); |
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|
132 if (output == NULL) { |
| 20469 | 133 PyErr_SetString(PyExc_MemoryError, |
| 134 "Can't allocate memory to compress data"); | |
| 135 return NULL; | |
|
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parents:
diff
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|
136 } |
| 9657 | 137 |
| 20469 | 138 /* Past the point of no return. From here on out, we need to make sure |
| 139 we clean up mallocs & INCREFs. */ | |
|
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|
140 |
|
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|
141 zst.zalloc = (alloc_func)NULL; |
|
c23989e22ffa
Simplify and fix error handling for most cases.
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|
142 zst.zfree = (free_func)Z_NULL; |
|
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|
143 zst.next_out = (Byte *)output; |
|
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Simplify and fix error handling for most cases.
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|
144 zst.next_in = (Byte *)input; |
|
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Simplify and fix error handling for most cases.
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|
145 zst.avail_in = length; |
|
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|
146 err = deflateInit(&zst, level); |
|
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Patch #450702: allow threads when calling into zlib, protect usage of
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|
147 |
|
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|
148 switch(err) { |
|
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|
149 case(Z_OK): |
| 20469 | 150 break; |
|
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parents:
diff
changeset
|
151 case(Z_MEM_ERROR): |
| 20469 | 152 PyErr_SetString(PyExc_MemoryError, |
| 153 "Out of memory while compressing data"); | |
|
20477
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Simplify and fix error handling for most cases.
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|
154 goto error; |
|
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Added Andrew Kuchling's zlib module.
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diff
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|
155 case(Z_STREAM_ERROR): |
| 20469 | 156 PyErr_SetString(ZlibError, |
| 157 "Bad compression level"); | |
|
20477
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Simplify and fix error handling for most cases.
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158 goto error; |
|
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Add zlib_error() helper.
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|
159 default: |
|
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|
160 deflateEnd(&zst); |
|
20474
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|
161 zlib_error(zst, err, "while compressing data"); |
|
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162 goto error; |
|
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parents:
diff
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|
163 } |
|
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Patch #450702: allow threads when calling into zlib, protect usage of
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164 |
|
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|
165 Py_BEGIN_ALLOW_THREADS; |
|
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|
166 err = deflate(&zst, Z_FINISH); |
|
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Simplify and fix error handling for most cases.
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|
167 Py_END_ALLOW_THREADS; |
|
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168 |
|
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169 if (err != Z_STREAM_END) { |
|
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|
170 zlib_error(zst, err, "while compressing data"); |
|
c23989e22ffa
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|
171 deflateEnd(&zst); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
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|
172 goto error; |
|
c23989e22ffa
Simplify and fix error handling for most cases.
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diff
changeset
|
173 } |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
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parents:
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diff
changeset
|
174 |
|
20477
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Simplify and fix error handling for most cases.
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changeset
|
175 err=deflateEnd(&zst); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
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|
176 if (err == Z_OK) |
|
20484
1a9494f9edb2
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diff
changeset
|
177 ReturnVal = PyString_FromStringAndSize((char *)output, |
|
20477
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Simplify and fix error handling for most cases.
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changeset
|
178 zst.total_out); |
|
20484
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Trimmed trailing whitespace.
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diff
changeset
|
179 else |
|
20477
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Simplify and fix error handling for most cases.
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changeset
|
180 zlib_error(zst, err, "while finishing compression"); |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
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|
181 |
|
20477
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Simplify and fix error handling for most cases.
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changeset
|
182 error: |
| 20469 | 183 free(output); |
|
19798
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Patch #450702: allow threads when calling into zlib, protect usage of
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diff
changeset
|
184 |
| 20469 | 185 return ReturnVal; |
|
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parents:
diff
changeset
|
186 } |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
187 |
|
23832
ed1ba37a46b7
Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents:
23295
diff
changeset
|
188 PyDoc_STRVAR(decompress__doc__, |
|
20485
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
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parents:
20484
diff
changeset
|
189 "decompress(string[, wbits[, bufsize]]) -- Return decompressed string.\n" |
|
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
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parents:
20484
diff
changeset
|
190 "\n" |
|
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
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parents:
20484
diff
changeset
|
191 "Optional arg wbits is the window buffer size. Optional arg bufsize is\n" |
|
23832
ed1ba37a46b7
Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents:
23295
diff
changeset
|
192 "the initial output buffer size."); |
| 5722 | 193 |
|
5352
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Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
194 static PyObject * |
|
13496
03bc51e43f7a
ANSI-fication
Peter Schneider-Kamp <nowonder@nowonder.de>
parents:
12576
diff
changeset
|
195 PyZlib_decompress(PyObject *self, PyObject *args) |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
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parents:
diff
changeset
|
196 { |
| 20469 | 197 PyObject *result_str; |
| 198 Byte *input; | |
| 199 int length, err; | |
|
43937
883884fdaae8
Fixed #1372: zlibmodule.c: int overflow in PyZlib_decompress
Christian Heimes <christian@cheimes.de>
parents:
42333
diff
changeset
|
200 int wsize=DEF_WBITS; |
|
883884fdaae8
Fixed #1372: zlibmodule.c: int overflow in PyZlib_decompress
Christian Heimes <christian@cheimes.de>
parents:
42333
diff
changeset
|
201 Py_ssize_t r_strlen=DEFAULTALLOC; |
| 20469 | 202 z_stream zst; |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
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parents:
16735
diff
changeset
|
203 |
|
43937
883884fdaae8
Fixed #1372: zlibmodule.c: int overflow in PyZlib_decompress
Christian Heimes <christian@cheimes.de>
parents:
42333
diff
changeset
|
204 if (!PyArg_ParseTuple(args, "s#|in:decompress", |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
205 &input, &length, &wsize, &r_strlen)) |
| 20469 | 206 return NULL; |
| 6236 | 207 |
| 20469 | 208 if (r_strlen <= 0) |
| 209 r_strlen = 1; | |
| 9657 | 210 |
| 20469 | 211 zst.avail_in = length; |
| 212 zst.avail_out = r_strlen; | |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
213 |
|
20470
8964ef84c92f
Remove many calls to set MemoryError exceptions.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20469
diff
changeset
|
214 if (!(result_str = PyString_FromStringAndSize(NULL, r_strlen))) |
| 20469 | 215 return NULL; |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
216 |
| 20469 | 217 zst.zalloc = (alloc_func)NULL; |
| 218 zst.zfree = (free_func)Z_NULL; | |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
219 zst.next_out = (Byte *)PyString_AS_STRING(result_str); |
| 20469 | 220 zst.next_in = (Byte *)input; |
| 221 err = inflateInit2(&zst, wsize); | |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
222 |
| 20469 | 223 switch(err) { |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
224 case(Z_OK): |
| 20469 | 225 break; |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
226 case(Z_MEM_ERROR): |
| 20469 | 227 PyErr_SetString(PyExc_MemoryError, |
| 228 "Out of memory while decompressing data"); | |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
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parents:
20475
diff
changeset
|
229 goto error; |
|
20474
a5a30ba2899f
Add zlib_error() helper.
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parents:
20470
diff
changeset
|
230 default: |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
231 inflateEnd(&zst); |
|
20474
a5a30ba2899f
Add zlib_error() helper.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20470
diff
changeset
|
232 zlib_error(zst, err, "while preparing to decompress data"); |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
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parents:
20475
diff
changeset
|
233 goto error; |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
234 } |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
235 |
| 20469 | 236 do { |
| 237 Py_BEGIN_ALLOW_THREADS | |
| 238 err=inflate(&zst, Z_FINISH); | |
| 239 Py_END_ALLOW_THREADS | |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
240 |
| 20469 | 241 switch(err) { |
| 242 case(Z_STREAM_END): | |
| 6007 | 243 break; |
|
8128
fdba6397b729
Tiny patch for zlib 1.1.2
Guido van Rossum <guido@python.org>
parents:
6911
diff
changeset
|
244 case(Z_BUF_ERROR): |
|
15098
7de0808f1fe3
Patch #101810: check whether zst.avail_out is non-zero when getting
Andrew M. Kuchling <amk@amk.ca>
parents:
13816
diff
changeset
|
245 /* |
|
7de0808f1fe3
Patch #101810: check whether zst.avail_out is non-zero when getting
Andrew M. Kuchling <amk@amk.ca>
parents:
13816
diff
changeset
|
246 * If there is at least 1 byte of room according to zst.avail_out |
|
7de0808f1fe3
Patch #101810: check whether zst.avail_out is non-zero when getting
Andrew M. Kuchling <amk@amk.ca>
parents:
13816
diff
changeset
|
247 * and we get this error, assume that it means zlib cannot |
|
7de0808f1fe3
Patch #101810: check whether zst.avail_out is non-zero when getting
Andrew M. Kuchling <amk@amk.ca>
parents:
13816
diff
changeset
|
248 * process the inflate call() due to an error in the data. |
|
7de0808f1fe3
Patch #101810: check whether zst.avail_out is non-zero when getting
Andrew M. Kuchling <amk@amk.ca>
parents:
13816
diff
changeset
|
249 */ |
|
20474
a5a30ba2899f
Add zlib_error() helper.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20470
diff
changeset
|
250 if (zst.avail_out > 0) { |
| 20469 | 251 PyErr_Format(ZlibError, "Error %i while decompressing data", |
| 252 err); | |
| 253 inflateEnd(&zst); | |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
254 goto error; |
| 20469 | 255 } |
|
15098
7de0808f1fe3
Patch #101810: check whether zst.avail_out is non-zero when getting
Andrew M. Kuchling <amk@amk.ca>
parents:
13816
diff
changeset
|
256 /* fall through */ |
|
7de0808f1fe3
Patch #101810: check whether zst.avail_out is non-zero when getting
Andrew M. Kuchling <amk@amk.ca>
parents:
13816
diff
changeset
|
257 case(Z_OK): |
| 6007 | 258 /* need more memory */ |
|
23295
6fa76b4e59fe
Repair widespread misuse of _PyString_Resize. Since it's clear people
Tim Peters <tim.peters@gmail.com>
parents:
23169
diff
changeset
|
259 if (_PyString_Resize(&result_str, r_strlen << 1) < 0) { |
| 20469 | 260 inflateEnd(&zst); |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
261 goto error; |
| 20469 | 262 } |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
263 zst.next_out = (unsigned char *)PyString_AS_STRING(result_str) \ |
| 20469 | 264 + r_strlen; |
| 265 zst.avail_out = r_strlen; | |
| 6007 | 266 r_strlen = r_strlen << 1; |
| 267 break; | |
|
20474
a5a30ba2899f
Add zlib_error() helper.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20470
diff
changeset
|
268 default: |
| 20469 | 269 inflateEnd(&zst); |
|
20474
a5a30ba2899f
Add zlib_error() helper.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20470
diff
changeset
|
270 zlib_error(zst, err, "while decompressing data"); |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
271 goto error; |
| 20469 | 272 } |
| 273 } while (err != Z_STREAM_END); | |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
274 |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
275 err = inflateEnd(&zst); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
276 if (err != Z_OK) { |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
277 zlib_error(zst, err, "while finishing data decompression"); |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
278 goto error; |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
279 } |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
280 |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
281 _PyString_Resize(&result_str, zst.total_out); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
282 return result_str; |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
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283 |
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284 error: |
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285 Py_XDECREF(result_str); |
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286 return NULL; |
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287 } |
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288 |
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289 static PyObject * |
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290 PyZlib_compressobj(PyObject *selfptr, PyObject *args) |
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291 { |
| 20475 | 292 compobject *self; |
| 293 int level=Z_DEFAULT_COMPRESSION, method=DEFLATED; | |
| 294 int wbits=MAX_WBITS, memLevel=DEF_MEM_LEVEL, strategy=0, err; | |
| 6007 | 295 |
| 20475 | 296 if (!PyArg_ParseTuple(args, "|iiiii:compressobj", &level, &method, &wbits, |
| 297 &memLevel, &strategy)) | |
| 298 return NULL; | |
| 6007 | 299 |
| 20475 | 300 self = newcompobject(&Comptype); |
|
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301 if (self==NULL) |
| 20475 | 302 return(NULL); |
| 303 self->zst.zalloc = (alloc_func)NULL; | |
| 304 self->zst.zfree = (free_func)Z_NULL; | |
|
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305 self->zst.next_in = NULL; |
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306 self->zst.avail_in = 0; |
| 20475 | 307 err = deflateInit2(&self->zst, level, method, wbits, memLevel, strategy); |
| 308 switch(err) { | |
|
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309 case (Z_OK): |
| 20475 | 310 self->is_initialised = 1; |
| 311 return (PyObject*)self; | |
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312 case (Z_MEM_ERROR): |
| 20475 | 313 Py_DECREF(self); |
| 314 PyErr_SetString(PyExc_MemoryError, | |
| 315 "Can't allocate memory for compression object"); | |
| 316 return NULL; | |
|
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317 case(Z_STREAM_ERROR): |
| 20475 | 318 Py_DECREF(self); |
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319 PyErr_SetString(PyExc_ValueError, "Invalid initialization option"); |
| 20475 | 320 return NULL; |
|
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321 default: |
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322 zlib_error(self->zst, err, "while creating compression object"); |
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323 Py_DECREF(self); |
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324 return NULL; |
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325 } |
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326 } |
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327 |
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328 static PyObject * |
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329 PyZlib_decompressobj(PyObject *selfptr, PyObject *args) |
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330 { |
| 20475 | 331 int wbits=DEF_WBITS, err; |
| 332 compobject *self; | |
| 333 if (!PyArg_ParseTuple(args, "|i:decompressobj", &wbits)) | |
| 334 return NULL; | |
| 335 | |
| 336 self = newcompobject(&Decomptype); | |
|
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337 if (self == NULL) |
| 20475 | 338 return(NULL); |
| 339 self->zst.zalloc = (alloc_func)NULL; | |
| 340 self->zst.zfree = (free_func)Z_NULL; | |
|
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341 self->zst.next_in = NULL; |
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342 self->zst.avail_in = 0; |
| 20475 | 343 err = inflateInit2(&self->zst, wbits); |
| 344 switch(err) { | |
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345 case (Z_OK): |
| 20475 | 346 self->is_initialised = 1; |
| 347 return (PyObject*)self; | |
| 6236 | 348 case(Z_STREAM_ERROR): |
| 20475 | 349 Py_DECREF(self); |
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350 PyErr_SetString(PyExc_ValueError, "Invalid initialization option"); |
| 20475 | 351 return NULL; |
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352 case (Z_MEM_ERROR): |
| 20475 | 353 Py_DECREF(self); |
| 354 PyErr_SetString(PyExc_MemoryError, | |
| 355 "Can't allocate memory for decompression object"); | |
| 356 return NULL; | |
|
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357 default: |
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358 zlib_error(self->zst, err, "while creating decompression object"); |
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359 Py_DECREF(self); |
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360 return NULL; |
| 20475 | 361 } |
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362 } |
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363 |
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364 static void |
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365 Comp_dealloc(compobject *self) |
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366 { |
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367 if (self->is_initialised) |
| 20475 | 368 deflateEnd(&self->zst); |
|
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369 Py_XDECREF(self->unused_data); |
|
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370 Py_XDECREF(self->unconsumed_tail); |
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371 PyObject_Del(self); |
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372 } |
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373 |
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374 static void |
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375 Decomp_dealloc(compobject *self) |
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376 { |
|
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377 if (self->is_initialised) |
| 20475 | 378 inflateEnd(&self->zst); |
|
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379 Py_XDECREF(self->unused_data); |
|
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380 Py_XDECREF(self->unconsumed_tail); |
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381 PyObject_Del(self); |
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382 } |
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383 |
|
23832
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Patch #568124: Add doc string macros.
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|
384 PyDoc_STRVAR(comp_compress__doc__, |
|
20485
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385 "compress(data) -- Return a string containing data compressed.\n" |
|
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386 "\n" |
| 5722 | 387 "After calling this function, some of the input data may still\n" |
| 388 "be stored in internal buffers for later processing.\n" | |
|
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389 "Call the flush() method to clear these buffers."); |
| 5722 | 390 |
| 391 | |
|
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392 static PyObject * |
|
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393 PyZlib_objcompress(compobject *self, PyObject *args) |
|
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|
394 { |
| 20469 | 395 int err, inplen, length = DEFAULTALLOC; |
| 396 PyObject *RetVal; | |
| 397 Byte *input; | |
| 398 unsigned long start_total_out; | |
|
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|
399 |
|
20478
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Undo needless INCREF chicanery introduced by SF patch #450702.
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|
400 if (!PyArg_ParseTuple(args, "s#:compress", &input, &inplen)) |
| 20469 | 401 return NULL; |
|
19798
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Patch #450702: allow threads when calling into zlib, protect usage of
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changeset
|
402 |
|
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8964ef84c92f
Remove many calls to set MemoryError exceptions.
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changeset
|
403 if (!(RetVal = PyString_FromStringAndSize(NULL, length))) |
| 20469 | 404 return NULL; |
|
19798
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Patch #450702: allow threads when calling into zlib, protect usage of
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|
405 |
| 20469 | 406 ENTER_ZLIB |
| 407 | |
| 408 start_total_out = self->zst.total_out; | |
| 409 self->zst.avail_in = inplen; | |
| 410 self->zst.next_in = input; | |
|
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|
411 self->zst.avail_out = length; |
|
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|
412 self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal); |
| 20469 | 413 |
|
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|
414 Py_BEGIN_ALLOW_THREADS |
|
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415 err = deflate(&(self->zst), Z_NO_FLUSH); |
|
19798
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Patch #450702: allow threads when calling into zlib, protect usage of
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|
416 Py_END_ALLOW_THREADS |
|
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Patch #450702: allow threads when calling into zlib, protect usage of
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|
417 |
| 20469 | 418 /* while Z_OK and the output buffer is full, there might be more output, |
| 419 so extend the output buffer and try again */ | |
| 420 while (err == Z_OK && self->zst.avail_out == 0) { | |
|
23295
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Repair widespread misuse of _PyString_Resize. Since it's clear people
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|
421 if (_PyString_Resize(&RetVal, length << 1) < 0) |
|
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|
422 goto error; |
|
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parents:
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diff
changeset
|
423 self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \ |
| 20469 | 424 + length; |
| 425 self->zst.avail_out = length; | |
| 426 length = length << 1; | |
|
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changeset
|
427 |
| 20469 | 428 Py_BEGIN_ALLOW_THREADS |
| 429 err = deflate(&(self->zst), Z_NO_FLUSH); | |
| 430 Py_END_ALLOW_THREADS | |
|
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Patch #450702: allow threads when calling into zlib, protect usage of
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|
431 } |
|
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changeset
|
432 /* We will only get Z_BUF_ERROR if the output buffer was full but |
| 20469 | 433 there wasn't more output when we tried again, so it is not an error |
|
20484
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diff
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|
434 condition. |
|
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changeset
|
435 */ |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
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parents:
16735
diff
changeset
|
436 |
|
20477
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Simplify and fix error handling for most cases.
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diff
changeset
|
437 if (err != Z_OK && err != Z_BUF_ERROR) { |
|
c23989e22ffa
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diff
changeset
|
438 zlib_error(self->zst, err, "while compressing"); |
|
c23989e22ffa
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diff
changeset
|
439 Py_DECREF(RetVal); |
|
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changeset
|
440 RetVal = NULL; |
|
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changeset
|
441 goto error; |
|
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parents:
20475
diff
changeset
|
442 } |
|
23295
6fa76b4e59fe
Repair widespread misuse of _PyString_Resize. Since it's clear people
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parents:
23169
diff
changeset
|
443 _PyString_Resize(&RetVal, self->zst.total_out - start_total_out); |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
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parents:
16735
diff
changeset
|
444 |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
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parents:
20475
diff
changeset
|
445 error: |
| 20469 | 446 LEAVE_ZLIB |
| 447 return RetVal; | |
|
5352
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Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
448 } |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
449 |
|
23832
ed1ba37a46b7
Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents:
23295
diff
changeset
|
450 PyDoc_STRVAR(decomp_decompress__doc__, |
|
20485
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
Tim Peters <tim.peters@gmail.com>
parents:
20484
diff
changeset
|
451 "decompress(data, max_length) -- Return a string containing the decompressed\n" |
|
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
Tim Peters <tim.peters@gmail.com>
parents:
20484
diff
changeset
|
452 "version of the data.\n" |
|
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
Tim Peters <tim.peters@gmail.com>
parents:
20484
diff
changeset
|
453 "\n" |
|
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
Tim Peters <tim.peters@gmail.com>
parents:
20484
diff
changeset
|
454 "After calling this function, some of the input data may still be stored in\n" |
|
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
Tim Peters <tim.peters@gmail.com>
parents:
20484
diff
changeset
|
455 "internal buffers for later processing.\n" |
|
20466
60e12f83d2d2
[ #403753 ] zlib decompress; uncontrollable memory usage
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20327
diff
changeset
|
456 "Call the flush() method to clear these buffers.\n" |
|
60e12f83d2d2
[ #403753 ] zlib decompress; uncontrollable memory usage
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20327
diff
changeset
|
457 "If the max_length parameter is specified then the return value will be\n" |
|
60e12f83d2d2
[ #403753 ] zlib decompress; uncontrollable memory usage
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20327
diff
changeset
|
458 "no longer than max_length. Unconsumed input data will be stored in\n" |
|
23832
ed1ba37a46b7
Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents:
23295
diff
changeset
|
459 "the unconsumed_tail attribute."); |
| 5722 | 460 |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
461 static PyObject * |
|
13496
03bc51e43f7a
ANSI-fication
Peter Schneider-Kamp <nowonder@nowonder.de>
parents:
12576
diff
changeset
|
462 PyZlib_objdecompress(compobject *self, PyObject *args) |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
463 { |
| 20469 | 464 int err, inplen, old_length, length = DEFAULTALLOC; |
| 465 int max_length = 0; | |
| 466 PyObject *RetVal; | |
| 467 Byte *input; | |
| 468 unsigned long start_total_out; | |
|
20466
60e12f83d2d2
[ #403753 ] zlib decompress; uncontrollable memory usage
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20327
diff
changeset
|
469 |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
470 if (!PyArg_ParseTuple(args, "s#|i:decompress", &input, |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
471 &inplen, &max_length)) |
| 20469 | 472 return NULL; |
| 473 if (max_length < 0) { | |
| 474 PyErr_SetString(PyExc_ValueError, | |
| 475 "max_length must be greater than zero"); | |
| 476 return NULL; | |
| 477 } | |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
478 |
| 20469 | 479 /* limit amount of data allocated to max_length */ |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
480 if (max_length && length > max_length) |
| 20469 | 481 length = max_length; |
|
20470
8964ef84c92f
Remove many calls to set MemoryError exceptions.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20469
diff
changeset
|
482 if (!(RetVal = PyString_FromStringAndSize(NULL, length))) |
| 20469 | 483 return NULL; |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
484 |
| 20469 | 485 ENTER_ZLIB |
| 486 | |
| 487 start_total_out = self->zst.total_out; | |
| 488 self->zst.avail_in = inplen; | |
| 489 self->zst.next_in = input; | |
| 490 self->zst.avail_out = length; | |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
491 self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal); |
|
20466
60e12f83d2d2
[ #403753 ] zlib decompress; uncontrollable memory usage
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20327
diff
changeset
|
492 |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
493 Py_BEGIN_ALLOW_THREADS |
|
16718
01c2470eeb2e
Patch #103373 from Donovan Baarda: This patch:
Andrew M. Kuchling <amk@amk.ca>
parents:
16369
diff
changeset
|
494 err = inflate(&(self->zst), Z_SYNC_FLUSH); |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
495 Py_END_ALLOW_THREADS |
|
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
496 |
| 20469 | 497 /* While Z_OK and the output buffer is full, there might be more output. |
| 498 So extend the output buffer and try again. | |
| 499 */ | |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
500 while (err == Z_OK && self->zst.avail_out == 0) { |
| 20469 | 501 /* If max_length set, don't continue decompressing if we've already |
| 502 reached the limit. | |
| 503 */ | |
| 504 if (max_length && length >= max_length) | |
| 505 break; | |
| 506 | |
| 507 /* otherwise, ... */ | |
| 508 old_length = length; | |
| 509 length = length << 1; | |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
510 if (max_length && length > max_length) |
| 20469 | 511 length = max_length; |
|
20466
60e12f83d2d2
[ #403753 ] zlib decompress; uncontrollable memory usage
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20327
diff
changeset
|
512 |
|
23295
6fa76b4e59fe
Repair widespread misuse of _PyString_Resize. Since it's clear people
Tim Peters <tim.peters@gmail.com>
parents:
23169
diff
changeset
|
513 if (_PyString_Resize(&RetVal, length) < 0) |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
514 goto error; |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
515 self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \ |
| 20469 | 516 + old_length; |
| 517 self->zst.avail_out = length - old_length; | |
| 518 | |
| 519 Py_BEGIN_ALLOW_THREADS | |
| 520 err = inflate(&(self->zst), Z_SYNC_FLUSH); | |
| 521 Py_END_ALLOW_THREADS | |
| 522 } | |
| 523 | |
|
34264
b2ecda4dd70f
[Bug #1083110] calling .flush() on decompress objects causes a segfault due to an uninitialized pointer: fixes the problem and adds a test case
Andrew M. Kuchling <amk@amk.ca>
parents:
27653
diff
changeset
|
524 /* Not all of the compressed data could be accommodated in the output buffer |
| 20469 | 525 of specified size. Return the unconsumed tail in an attribute.*/ |
| 526 if(max_length) { | |
| 527 Py_DECREF(self->unconsumed_tail); | |
| 20644 | 528 self->unconsumed_tail = PyString_FromStringAndSize((char *)self->zst.next_in, |
| 20469 | 529 self->zst.avail_in); |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
530 if(!self->unconsumed_tail) { |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
531 Py_DECREF(RetVal); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
532 RetVal = NULL; |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
533 goto error; |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
534 } |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
535 } |
| 20469 | 536 |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
537 /* The end of the compressed data has been reached, so set the |
|
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
538 unused_data attribute to a string containing the remainder of the |
|
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
539 data in the string. Note that this is also a logical place to call |
| 20469 | 540 inflateEnd, but the old behaviour of only calling it on flush() is |
| 541 preserved. | |
| 542 */ | |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
543 if (err == Z_STREAM_END) { |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
544 Py_XDECREF(self->unused_data); /* Free original empty string */ |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
545 self->unused_data = PyString_FromStringAndSize( |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
546 (char *)self->zst.next_in, self->zst.avail_in); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
547 if (self->unused_data == NULL) { |
| 20469 | 548 Py_DECREF(RetVal); |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
549 goto error; |
| 20469 | 550 } |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
551 /* We will only get Z_BUF_ERROR if the output buffer was full |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
552 but there wasn't more output when we tried again, so it is |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
553 not an error condition. |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
554 */ |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
555 } else if (err != Z_OK && err != Z_BUF_ERROR) { |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
556 zlib_error(self->zst, err, "while decompressing"); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
557 Py_DECREF(RetVal); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
558 RetVal = NULL; |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
559 goto error; |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
560 } |
|
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
561 |
|
23295
6fa76b4e59fe
Repair widespread misuse of _PyString_Resize. Since it's clear people
Tim Peters <tim.peters@gmail.com>
parents:
23169
diff
changeset
|
562 _PyString_Resize(&RetVal, self->zst.total_out - start_total_out); |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
563 |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
564 error: |
| 20469 | 565 LEAVE_ZLIB |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
566 |
| 20469 | 567 return RetVal; |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
568 } |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
569 |
|
23832
ed1ba37a46b7
Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents:
23295
diff
changeset
|
570 PyDoc_STRVAR(comp_flush__doc__, |
| 9657 | 571 "flush( [mode] ) -- Return a string containing any remaining compressed data.\n" |
|
20485
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
Tim Peters <tim.peters@gmail.com>
parents:
20484
diff
changeset
|
572 "\n" |
|
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
Tim Peters <tim.peters@gmail.com>
parents:
20484
diff
changeset
|
573 "mode can be one of the constants Z_SYNC_FLUSH, Z_FULL_FLUSH, Z_FINISH; the\n" |
| 9657 | 574 "default value used when mode is not specified is Z_FINISH.\n" |
| 575 "If mode == Z_FINISH, the compressor object can no longer be used after\n" | |
|
23832
ed1ba37a46b7
Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents:
23295
diff
changeset
|
576 "calling the flush() method. Otherwise, more data can still be compressed."); |
| 5722 | 577 |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
578 static PyObject * |
|
13496
03bc51e43f7a
ANSI-fication
Peter Schneider-Kamp <nowonder@nowonder.de>
parents:
12576
diff
changeset
|
579 PyZlib_flush(compobject *self, PyObject *args) |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
580 { |
| 20469 | 581 int err, length = DEFAULTALLOC; |
| 582 PyObject *RetVal; | |
| 583 int flushmode = Z_FINISH; | |
| 584 unsigned long start_total_out; | |
| 9657 | 585 |
| 20469 | 586 if (!PyArg_ParseTuple(args, "|i:flush", &flushmode)) |
| 587 return NULL; | |
| 9657 | 588 |
| 20469 | 589 /* Flushing with Z_NO_FLUSH is a no-op, so there's no point in |
| 590 doing any work at all; just return an empty string. */ | |
| 591 if (flushmode == Z_NO_FLUSH) { | |
| 592 return PyString_FromStringAndSize(NULL, 0); | |
| 593 } | |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
594 |
|
20470
8964ef84c92f
Remove many calls to set MemoryError exceptions.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20469
diff
changeset
|
595 if (!(RetVal = PyString_FromStringAndSize(NULL, length))) |
| 20469 | 596 return NULL; |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
597 |
| 20469 | 598 ENTER_ZLIB |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
599 |
| 20469 | 600 start_total_out = self->zst.total_out; |
| 601 self->zst.avail_in = 0; | |
|
16718
01c2470eeb2e
Patch #103373 from Donovan Baarda: This patch:
Andrew M. Kuchling <amk@amk.ca>
parents:
16369
diff
changeset
|
602 self->zst.avail_out = length; |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
603 self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal); |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
604 |
|
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
605 Py_BEGIN_ALLOW_THREADS |
|
16718
01c2470eeb2e
Patch #103373 from Donovan Baarda: This patch:
Andrew M. Kuchling <amk@amk.ca>
parents:
16369
diff
changeset
|
606 err = deflate(&(self->zst), flushmode); |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
607 Py_END_ALLOW_THREADS |
| 20469 | 608 |
| 609 /* while Z_OK and the output buffer is full, there might be more output, | |
| 610 so extend the output buffer and try again */ | |
| 611 while (err == Z_OK && self->zst.avail_out == 0) { | |
|
23295
6fa76b4e59fe
Repair widespread misuse of _PyString_Resize. Since it's clear people
Tim Peters <tim.peters@gmail.com>
parents:
23169
diff
changeset
|
612 if (_PyString_Resize(&RetVal, length << 1) < 0) |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
613 goto error; |
|
20478
071cfee8d8eb
Undo needless INCREF chicanery introduced by SF patch #450702.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20477
diff
changeset
|
614 self->zst.next_out = (unsigned char *)PyString_AS_STRING(RetVal) \ |
| 20469 | 615 + length; |
| 616 self->zst.avail_out = length; | |
| 617 length = length << 1; | |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
618 |
| 20469 | 619 Py_BEGIN_ALLOW_THREADS |
| 620 err = deflate(&(self->zst), flushmode); | |
| 621 Py_END_ALLOW_THREADS | |
| 622 } | |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
623 |
| 20469 | 624 /* If flushmode is Z_FINISH, we also have to call deflateEnd() to free |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
625 various data structures. Note we should only get Z_STREAM_END when |
| 20469 | 626 flushmode is Z_FINISH, but checking both for safety*/ |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
627 if (err == Z_STREAM_END && flushmode == Z_FINISH) { |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
628 err = deflateEnd(&(self->zst)); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
629 if (err != Z_OK) { |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
630 zlib_error(self->zst, err, "from deflateEnd()"); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
631 Py_DECREF(RetVal); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
632 RetVal = NULL; |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
633 goto error; |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
634 } |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
635 else |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
636 self->is_initialised = 0; |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
637 |
|
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
638 /* We will only get Z_BUF_ERROR if the output buffer was full |
|
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
639 but there wasn't more output when we tried again, so it is |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
640 not an error condition. |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
641 */ |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
642 } else if (err!=Z_OK && err!=Z_BUF_ERROR) { |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
643 zlib_error(self->zst, err, "while flushing"); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
644 Py_DECREF(RetVal); |
|
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
645 RetVal = NULL; |
|
23169
713ff889d094
Fix SF #544995 (zlib crash on second flush call)
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
22729
diff
changeset
|
646 goto error; |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
647 } |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
648 |
|
23295
6fa76b4e59fe
Repair widespread misuse of _PyString_Resize. Since it's clear people
Tim Peters <tim.peters@gmail.com>
parents:
23169
diff
changeset
|
649 _PyString_Resize(&RetVal, self->zst.total_out - start_total_out); |
| 20469 | 650 |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
651 error: |
|
20483
5d678356c894
Removed more comments that didn't make much sense.
Tim Peters <tim.peters@gmail.com>
parents:
20482
diff
changeset
|
652 LEAVE_ZLIB |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
653 |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
654 return RetVal; |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
655 } |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
656 |
|
38771
618d088d9668
Patch #1503046, Conditional compilation of zlib.(de)compressobj.copy
Neal Norwitz <nnorwitz@gmail.com>
parents:
38198
diff
changeset
|
657 #ifdef HAVE_ZLIB_COPY |
|
38190
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
658 PyDoc_STRVAR(comp_copy__doc__, |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
659 "copy() -- Return a copy of the compression object."); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
660 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
661 static PyObject * |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
662 PyZlib_copy(compobject *self) |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
663 { |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
664 compobject *retval = NULL; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
665 int err; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
666 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
667 retval = newcompobject(&Comptype); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
668 if (!retval) return NULL; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
669 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
670 /* Copy the zstream state |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
671 * We use ENTER_ZLIB / LEAVE_ZLIB to make this thread-safe |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
672 */ |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
673 ENTER_ZLIB |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
674 err = deflateCopy(&retval->zst, &self->zst); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
675 switch(err) { |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
676 case(Z_OK): |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
677 break; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
678 case(Z_STREAM_ERROR): |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
679 PyErr_SetString(PyExc_ValueError, "Inconsistent stream state"); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
680 goto error; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
681 case(Z_MEM_ERROR): |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
682 PyErr_SetString(PyExc_MemoryError, |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
683 "Can't allocate memory for compression object"); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
684 goto error; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
685 default: |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
686 zlib_error(self->zst, err, "while copying compression object"); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
687 goto error; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
688 } |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
689 |
|
38198
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
690 Py_INCREF(self->unused_data); |
|
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
691 Py_INCREF(self->unconsumed_tail); |
|
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
692 Py_XDECREF(retval->unused_data); |
|
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
693 Py_XDECREF(retval->unconsumed_tail); |
|
38190
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
694 retval->unused_data = self->unused_data; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
695 retval->unconsumed_tail = self->unconsumed_tail; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
696 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
697 /* Mark it as being initialized */ |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
698 retval->is_initialised = 1; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
699 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
700 LEAVE_ZLIB |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
701 return (PyObject *)retval; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
702 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
703 error: |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
704 LEAVE_ZLIB |
|
38198
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
705 Py_XDECREF(retval); |
|
38190
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
706 return NULL; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
707 } |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
708 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
709 PyDoc_STRVAR(decomp_copy__doc__, |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
710 "copy() -- Return a copy of the decompression object."); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
711 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
712 static PyObject * |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
713 PyZlib_uncopy(compobject *self) |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
714 { |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
715 compobject *retval = NULL; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
716 int err; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
717 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
718 retval = newcompobject(&Decomptype); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
719 if (!retval) return NULL; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
720 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
721 /* Copy the zstream state |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
722 * We use ENTER_ZLIB / LEAVE_ZLIB to make this thread-safe |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
723 */ |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
724 ENTER_ZLIB |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
725 err = inflateCopy(&retval->zst, &self->zst); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
726 switch(err) { |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
727 case(Z_OK): |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
728 break; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
729 case(Z_STREAM_ERROR): |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
730 PyErr_SetString(PyExc_ValueError, "Inconsistent stream state"); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
731 goto error; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
732 case(Z_MEM_ERROR): |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
733 PyErr_SetString(PyExc_MemoryError, |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
734 "Can't allocate memory for decompression object"); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
735 goto error; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
736 default: |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
737 zlib_error(self->zst, err, "while copying decompression object"); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
738 goto error; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
739 } |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
740 |
|
38198
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
741 Py_INCREF(self->unused_data); |
|
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
742 Py_INCREF(self->unconsumed_tail); |
|
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
743 Py_XDECREF(retval->unused_data); |
|
30188c523bc5
PyZlib_copy(), PyZlib_uncopy(): Repair leaks on the normal-case path.
Tim Peters <tim.peters@gmail.com>
parents:
38190
diff
changeset
|
744 Py_XDECREF(retval->unconsumed_tail); |
|
38190
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
745 retval->unused_data = self->unused_data; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
746 retval->unconsumed_tail = self->unconsumed_tail; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
747 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
748 /* Mark it as being initialized */ |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
749 retval->is_initialised = 1; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
750 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
751 LEAVE_ZLIB |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
752 return (PyObject *)retval; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
753 |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
754 error: |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
755 LEAVE_ZLIB |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
756 Py_XDECREF(retval); |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
757 return NULL; |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
758 } |
|
38771
618d088d9668
Patch #1503046, Conditional compilation of zlib.(de)compressobj.copy
Neal Norwitz <nnorwitz@gmail.com>
parents:
38198
diff
changeset
|
759 #endif |
|
38190
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
760 |
|
23832
ed1ba37a46b7
Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents:
23295
diff
changeset
|
761 PyDoc_STRVAR(decomp_flush__doc__, |
|
37373
f64812b2b5c1
Patch #1459631: documnent zlib.Decompress.flush() length parameter.
Georg Brandl <georg@python.org>
parents:
36324
diff
changeset
|
762 "flush( [length] ) -- Return a string containing any remaining\n" |
|
f64812b2b5c1
Patch #1459631: documnent zlib.Decompress.flush() length parameter.
Georg Brandl <georg@python.org>
parents:
36324
diff
changeset
|
763 "decompressed data. length, if given, is the initial size of the\n" |
|
f64812b2b5c1
Patch #1459631: documnent zlib.Decompress.flush() length parameter.
Georg Brandl <georg@python.org>
parents:
36324
diff
changeset
|
764 "output buffer.\n" |
|
20485
4af8d24fa691
Simplify and regularize docstrings. Also reformat so that each docstring
Tim Peters <tim.peters@gmail.com>
parents:
20484
diff
changeset
|
765 "\n" |
|
23832
ed1ba37a46b7
Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents:
23295
diff
changeset
|
766 "The decompressor object can no longer be used after this call."); |
| 5722 | 767 |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
768 static PyObject * |
|
13496
03bc51e43f7a
ANSI-fication
Peter Schneider-Kamp <nowonder@nowonder.de>
parents:
12576
diff
changeset
|
769 PyZlib_unflush(compobject *self, PyObject *args) |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
770 { |
|
27653
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
771 int err, length = DEFAULTALLOC; |
|
20477
c23989e22ffa
Simplify and fix error handling for most cases.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
20475
diff
changeset
|
772 PyObject * retval = NULL; |
|
27653
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
773 unsigned long start_total_out; |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
774 |
|
27653
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
775 if (!PyArg_ParseTuple(args, "|i:flush", &length)) |
| 20469 | 776 return NULL; |
|
27653
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
777 if (!(retval = PyString_FromStringAndSize(NULL, length))) |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
778 return NULL; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
779 |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
780 |
| 20469 | 781 ENTER_ZLIB |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
782 |
|
27653
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
783 start_total_out = self->zst.total_out; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
784 self->zst.avail_out = length; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
785 self->zst.next_out = (Byte *)PyString_AS_STRING(retval); |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
786 |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
787 Py_BEGIN_ALLOW_THREADS |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
788 err = inflate(&(self->zst), Z_FINISH); |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
789 Py_END_ALLOW_THREADS |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
790 |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
791 /* while Z_OK and the output buffer is full, there might be more output, |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
792 so extend the output buffer and try again */ |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
793 while ((err == Z_OK || err == Z_BUF_ERROR) && self->zst.avail_out == 0) { |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
794 if (_PyString_Resize(&retval, length << 1) < 0) |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
795 goto error; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
796 self->zst.next_out = (Byte *)PyString_AS_STRING(retval) + length; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
797 self->zst.avail_out = length; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
798 length = length << 1; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
799 |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
800 Py_BEGIN_ALLOW_THREADS |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
801 err = inflate(&(self->zst), Z_FINISH); |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
802 Py_END_ALLOW_THREADS |
| 20469 | 803 } |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
804 |
|
27653
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
805 /* If flushmode is Z_FINISH, we also have to call deflateEnd() to free |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
806 various data structures. Note we should only get Z_STREAM_END when |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
807 flushmode is Z_FINISH */ |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
808 if (err == Z_STREAM_END) { |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
809 err = inflateEnd(&(self->zst)); |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
810 self->is_initialised = 0; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
811 if (err != Z_OK) { |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
812 zlib_error(self->zst, err, "from inflateEnd()"); |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
813 Py_DECREF(retval); |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
814 retval = NULL; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
815 goto error; |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
816 } |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
817 } |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
818 _PyString_Resize(&retval, self->zst.total_out - start_total_out); |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
819 |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
820 error: |
|
106a44a4b975
- Thanks to Scott David Daniels, a subtle bug in how the zlib
Guido van Rossum <guido@python.org>
parents:
24363
diff
changeset
|
821 |
| 20469 | 822 LEAVE_ZLIB |
|
19798
091c01d07d98
Patch #450702: allow threads when calling into zlib, protect usage of
Martin v. Löwis <martin@v.loewis.de>
parents:
16735
diff
changeset
|
823 |
| 20469 | 824 return retval; |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
825 } |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
826 |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
827 static PyMethodDef comp_methods[] = |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
828 { |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
829 {"compress", (binaryfunc)PyZlib_objcompress, METH_VARARGS, |
| 20469 | 830 comp_compress__doc__}, |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
831 {"flush", (binaryfunc)PyZlib_flush, METH_VARARGS, |
| 20469 | 832 comp_flush__doc__}, |
|
38771
618d088d9668
Patch #1503046, Conditional compilation of zlib.(de)compressobj.copy
Neal Norwitz <nnorwitz@gmail.com>
parents:
38198
diff
changeset
|
833 #ifdef HAVE_ZLIB_COPY |
|
38190
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
834 {"copy", (PyCFunction)PyZlib_copy, METH_NOARGS, |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
835 comp_copy__doc__}, |
|
38771
618d088d9668
Patch #1503046, Conditional compilation of zlib.(de)compressobj.copy
Neal Norwitz <nnorwitz@gmail.com>
parents:
38198
diff
changeset
|
836 #endif |
| 20469 | 837 {NULL, NULL} |
|
5352
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
838 }; |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
839 |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
840 static PyMethodDef Decomp_methods[] = |
|
d5757aad1a4f
Added Andrew Kuchling's zlib module.
Guido van Rossum <guido@python.org>
parents:
diff
changeset
|
841 { |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
842 {"decompress", (binaryfunc)PyZlib_objdecompress, METH_VARARGS, |
| 20469 | 843 decomp_decompress__doc__}, |
|
20484
1a9494f9edb2
Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents:
20483
diff
changeset
|
844 {"flush", (binaryfunc)PyZlib_unflush, METH_VARARGS, |
| 20469 | 845 decomp_flush__doc__}, |
|
38771
618d088d9668
Patch #1503046, Conditional compilation of zlib.(de)compressobj.copy
Neal Norwitz <nnorwitz@gmail.com>
parents:
38198
diff
changeset
|
846 #ifdef HAVE_ZLIB_COPY |
|
38190
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
847 {"copy", (PyCFunction)PyZlib_uncopy, METH_NOARGS, |
|
d6d879af36d3
Patch #1435422: zlib's compress and decompress objects now have a
Georg Brandl <georg@python.org>
parents:
37373
diff
changeset
|
848 decomp_copy__doc__}, |
|
38771
618d088d9668
Patch #1503046, Conditional compilation of zlib.(de)compressobj.copy
Neal Norwitz <nnorwitz@gmail.com>
parents:
38198
diff
changeset
|
849 #endif |
| 20469 | 850 {NULL, NULL} |
|
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851 }; |
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852 |
|
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853 static PyObject * |
|
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854 Comp_getattr(compobject *self, char *name) |
|
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855 { |
|
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|
856 /* No ENTER/LEAVE_ZLIB is necessary because this fn doesn't touch |
|
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857 internal data. */ |
|
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858 |
|
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859 return Py_FindMethod(comp_methods, (PyObject *)self, name); |
|
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860 } |
|
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861 |
|
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862 static PyObject * |
|
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863 Decomp_getattr(compobject *self, char *name) |
|
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|
864 { |
| 20469 | 865 PyObject * retval; |
|
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866 |
| 20469 | 867 ENTER_ZLIB |
|
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868 |
|
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869 if (strcmp(name, "unused_data") == 0) { |
| 20469 | 870 Py_INCREF(self->unused_data); |
| 871 retval = self->unused_data; | |
|
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872 } else if (strcmp(name, "unconsumed_tail") == 0) { |
| 20469 | 873 Py_INCREF(self->unconsumed_tail); |
| 874 retval = self->unconsumed_tail; | |
|
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875 } else |
| 20469 | 876 retval = Py_FindMethod(Decomp_methods, (PyObject *)self, name); |
|
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877 |
| 20469 | 878 LEAVE_ZLIB |
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879 |
| 20469 | 880 return retval; |
|
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881 } |
|
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|
882 |
|
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883 PyDoc_STRVAR(adler32__doc__, |
|
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884 "adler32(string[, start]) -- Compute an Adler-32 checksum of string.\n" |
|
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885 "\n" |
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886 "An optional starting value can be specified. The returned checksum is\n" |
|
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887 "an integer."); |
| 5722 | 888 |
|
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|
889 static PyObject * |
|
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|
890 PyZlib_adler32(PyObject *self, PyObject *args) |
|
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891 { |
| 20469 | 892 uLong adler32val = adler32(0L, Z_NULL, 0); |
| 6236 | 893 Byte *buf; |
| 894 int len; | |
|
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895 |
|
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|
896 if (!PyArg_ParseTuple(args, "s#|k:adler32", &buf, &len, &adler32val)) |
| 6236 | 897 return NULL; |
| 898 adler32val = adler32(adler32val, buf, len); | |
| 899 return PyInt_FromLong(adler32val); | |
|
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900 } |
|
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901 |
|
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|
902 PyDoc_STRVAR(crc32__doc__, |
|
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903 "crc32(string[, start]) -- Compute a CRC-32 checksum of string.\n" |
|
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904 "\n" |
|
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905 "An optional starting value can be specified. The returned checksum is\n" |
|
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|
906 "an integer."); |
|
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|
907 |
|
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908 static PyObject * |
|
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909 PyZlib_crc32(PyObject *self, PyObject *args) |
|
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|
910 { |
| 20469 | 911 uLong crc32val = crc32(0L, Z_NULL, 0); |
| 6236 | 912 Byte *buf; |
| 913 int len; | |
|
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|
914 if (!PyArg_ParseTuple(args, "s#|k:crc32", &buf, &len, &crc32val)) |
| 6236 | 915 return NULL; |
| 916 crc32val = crc32(crc32val, buf, len); | |
| 917 return PyInt_FromLong(crc32val); | |
|
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918 } |
|
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919 |
|
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|
920 |
|
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|
921 static PyMethodDef zlib_methods[] = |
|
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|
922 { |
|
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|
923 {"adler32", (PyCFunction)PyZlib_adler32, METH_VARARGS, |
| 20469 | 924 adler32__doc__}, |
|
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925 {"compress", (PyCFunction)PyZlib_compress, METH_VARARGS, |
| 20469 | 926 compress__doc__}, |
|
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927 {"compressobj", (PyCFunction)PyZlib_compressobj, METH_VARARGS, |
| 20469 | 928 compressobj__doc__}, |
|
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929 {"crc32", (PyCFunction)PyZlib_crc32, METH_VARARGS, |
|
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930 crc32__doc__}, |
|
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|
931 {"decompress", (PyCFunction)PyZlib_decompress, METH_VARARGS, |
| 20469 | 932 decompress__doc__}, |
|
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|
933 {"decompressobj", (PyCFunction)PyZlib_decompressobj, METH_VARARGS, |
| 20469 | 934 decompressobj__doc__}, |
| 935 {NULL, NULL} | |
|
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|
936 }; |
|
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|
937 |
|
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|
938 static PyTypeObject Comptype = { |
|
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|
939 PyVarObject_HEAD_INIT(0, 0) |
|
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|
940 "zlib.Compress", |
| 20469 | 941 sizeof(compobject), |
| 942 0, | |
| 943 (destructor)Comp_dealloc, /*tp_dealloc*/ | |
| 944 0, /*tp_print*/ | |
| 945 (getattrfunc)Comp_getattr, /*tp_getattr*/ | |
| 946 0, /*tp_setattr*/ | |
| 947 0, /*tp_compare*/ | |
| 948 0, /*tp_repr*/ | |
| 949 0, /*tp_as_number*/ | |
| 950 0, /*tp_as_sequence*/ | |
| 951 0, /*tp_as_mapping*/ | |
|
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diff
changeset
|
952 }; |
|
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parents:
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|
953 |
|
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|
954 static PyTypeObject Decomptype = { |
|
42333
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|
955 PyVarObject_HEAD_INIT(0, 0) |
|
21313
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parents:
20644
diff
changeset
|
956 "zlib.Decompress", |
| 20469 | 957 sizeof(compobject), |
| 958 0, | |
| 959 (destructor)Decomp_dealloc, /*tp_dealloc*/ | |
| 960 0, /*tp_print*/ | |
| 961 (getattrfunc)Decomp_getattr, /*tp_getattr*/ | |
| 962 0, /*tp_setattr*/ | |
| 963 0, /*tp_compare*/ | |
| 964 0, /*tp_repr*/ | |
| 965 0, /*tp_as_number*/ | |
| 966 0, /*tp_as_sequence*/ | |
| 967 0, /*tp_as_mapping*/ | |
|
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parents:
diff
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|
968 }; |
|
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|
969 |
|
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|
970 PyDoc_STRVAR(zlib_module_documentation, |
|
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|
971 "The functions in this module allow compression and decompression using the\n" |
|
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|
972 "zlib library, which is based on GNU zip.\n" |
|
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|
973 "\n" |
|
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|
974 "adler32(string[, start]) -- Compute an Adler-32 checksum.\n" |
|
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diff
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|
975 "compress(string[, level]) -- Compress string, with compression level in 1-9.\n" |
| 5722 | 976 "compressobj([level]) -- Return a compressor object.\n" |
|
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|
977 "crc32(string[, start]) -- Compute a CRC-32 checksum.\n" |
|
11607
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Andrew M. Kuchling <amk@amk.ca>
parents:
10571
diff
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|
978 "decompress(string,[wbits],[bufsize]) -- Decompresses a compressed string.\n" |
|
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|
979 "decompressobj([wbits]) -- Return a decompressor object.\n" |
|
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980 "\n" |
|
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|
981 "'wbits' is window buffer size.\n" |
|
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|
982 "Compressor objects support compress() and flush() methods; decompressor\n" |
|
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|
983 "objects support decompress() and flush()."); |
| 5722 | 984 |
|
24363
979ff5d0ae07
Replace DL_IMPORT with PyMODINIT_FUNC and remove "/export:init..." link
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parents:
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|
985 PyMODINIT_FUNC |
|
13651
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|
986 PyInit_zlib(void) |
|
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|
987 { |
|
22729
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|
988 PyObject *m, *ver; |
|
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|
989 Py_TYPE(&Comptype) = &PyType_Type; |
|
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|
990 Py_TYPE(&Decomptype) = &PyType_Type; |
| 20469 | 991 m = Py_InitModule4("zlib", zlib_methods, |
| 992 zlib_module_documentation, | |
| 993 (PyObject*)NULL,PYTHON_API_VERSION); | |
|
36324
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diff
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|
994 if (m == NULL) |
|
1af7f719ed28
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|
995 return; |
|
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parents:
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|
996 |
| 20469 | 997 ZlibError = PyErr_NewException("zlib.error", NULL, NULL); |
|
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|
998 if (ZlibError != NULL) { |
|
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|
999 Py_INCREF(ZlibError); |
|
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parents:
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diff
changeset
|
1000 PyModule_AddObject(m, "error", ZlibError); |
|
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1001 } |
| 20469 | 1002 PyModule_AddIntConstant(m, "MAX_WBITS", MAX_WBITS); |
| 1003 PyModule_AddIntConstant(m, "DEFLATED", DEFLATED); | |
| 1004 PyModule_AddIntConstant(m, "DEF_MEM_LEVEL", DEF_MEM_LEVEL); | |
| 1005 PyModule_AddIntConstant(m, "Z_BEST_SPEED", Z_BEST_SPEED); | |
| 1006 PyModule_AddIntConstant(m, "Z_BEST_COMPRESSION", Z_BEST_COMPRESSION); | |
| 1007 PyModule_AddIntConstant(m, "Z_DEFAULT_COMPRESSION", Z_DEFAULT_COMPRESSION); | |
| 1008 PyModule_AddIntConstant(m, "Z_FILTERED", Z_FILTERED); | |
| 1009 PyModule_AddIntConstant(m, "Z_HUFFMAN_ONLY", Z_HUFFMAN_ONLY); | |
| 1010 PyModule_AddIntConstant(m, "Z_DEFAULT_STRATEGY", Z_DEFAULT_STRATEGY); | |
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1011 |
| 20469 | 1012 PyModule_AddIntConstant(m, "Z_FINISH", Z_FINISH); |
| 1013 PyModule_AddIntConstant(m, "Z_NO_FLUSH", Z_NO_FLUSH); | |
| 1014 PyModule_AddIntConstant(m, "Z_SYNC_FLUSH", Z_SYNC_FLUSH); | |
| 1015 PyModule_AddIntConstant(m, "Z_FULL_FLUSH", Z_FULL_FLUSH); | |
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1016 |
| 20469 | 1017 ver = PyString_FromString(ZLIB_VERSION); |
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1018 if (ver != NULL) |
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1019 PyModule_AddObject(m, "ZLIB_VERSION", ver); |
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1020 |
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1021 PyModule_AddStringConstant(m, "__version__", "1.0"); |
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1022 |
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1023 #ifdef WITH_THREAD |
| 20469 | 1024 zlib_lock = PyThread_allocate_lock(); |
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1025 #endif /* WITH_THREAD */ |
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1026 } |