Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 1 | /* zlibmodule.c -- gzip-compatible data compression */ |
Guido van Rossum | 821a5e4 | 1998-05-08 14:56:29 +0000 | [diff] [blame] | 2 | /* See http://www.cdrom.com/pub/infozip/zlib/ */ |
| 3 | /* See http://www.winimage.com/zLibDll for Windows */ |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 4 | |
Guido van Rossum | 97b5457 | 1997-06-03 22:21:47 +0000 | [diff] [blame] | 5 | #include "Python.h" |
Guido van Rossum | 9ec0f8b | 1997-12-18 05:21:29 +0000 | [diff] [blame] | 6 | #ifdef MS_WIN32 |
| 7 | #define ZLIB_DLL |
| 8 | #endif |
Guido van Rossum | 97b5457 | 1997-06-03 22:21:47 +0000 | [diff] [blame] | 9 | #include "zlib.h" |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 10 | |
| 11 | /* The following parameters are copied from zutil.h, version 0.95 */ |
| 12 | #define DEFLATED 8 |
| 13 | #if MAX_MEM_LEVEL >= 8 |
| 14 | # define DEF_MEM_LEVEL 8 |
| 15 | #else |
| 16 | # define DEF_MEM_LEVEL MAX_MEM_LEVEL |
| 17 | #endif |
| 18 | #define DEF_WBITS MAX_WBITS |
| 19 | |
| 20 | /* The output buffer will be increased in chunks of ADDCHUNK bytes. */ |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 21 | #define DEFAULTALLOC 16*1024 |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 22 | #define PyInit_zlib initzlib |
| 23 | |
| 24 | staticforward PyTypeObject Comptype; |
| 25 | staticforward PyTypeObject Decomptype; |
| 26 | |
| 27 | static PyObject *ZlibError; |
| 28 | |
| 29 | typedef struct |
| 30 | { |
| 31 | PyObject_HEAD |
| 32 | z_stream zst; |
| 33 | } compobject; |
| 34 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 35 | static char compressobj__doc__[] = |
| 36 | "compressobj() -- Return a compressor object.\n" |
| 37 | "compressobj(level) -- Return a compressor object, using the given compression level.\n" |
| 38 | ; |
| 39 | |
| 40 | static char decompressobj__doc__[] = |
| 41 | "decompressobj() -- Return a decompressor object.\n" |
| 42 | "decompressobj(wbits) -- Return a decompressor object, setting the window buffer size to wbits.\n" |
| 43 | ; |
| 44 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 45 | static compobject * |
| 46 | newcompobject(type) |
| 47 | PyTypeObject *type; |
| 48 | { |
| 49 | compobject *self; |
| 50 | self = PyObject_NEW(compobject, type); |
| 51 | if (self == NULL) |
| 52 | return NULL; |
| 53 | return self; |
| 54 | } |
| 55 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 56 | static char compress__doc__[] = |
| 57 | "compress(string) -- Compress string using the default compression level, " |
| 58 | "returning a string containing compressed data.\n" |
| 59 | "compress(string, level) -- Compress string, using the chosen compression " |
| 60 | "level (from 1 to 9). Return a string containing the compressed data.\n" |
| 61 | ; |
| 62 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 63 | static PyObject * |
| 64 | PyZlib_compress(self, args) |
| 65 | PyObject *self; |
| 66 | PyObject *args; |
| 67 | { |
| 68 | PyObject *ReturnVal; |
| 69 | Byte *input, *output; |
| 70 | int length, level=Z_DEFAULT_COMPRESSION, err; |
| 71 | z_stream zst; |
| 72 | |
| 73 | if (!PyArg_ParseTuple(args, "s#|i", &input, &length, &level)) |
| 74 | return NULL; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 75 | zst.avail_out = length + length/1000 + 12 + 1; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 76 | output=(Byte*)malloc(zst.avail_out); |
| 77 | if (output==NULL) |
| 78 | { |
| 79 | PyErr_SetString(PyExc_MemoryError, |
| 80 | "Can't allocate memory to compress data"); |
| 81 | return NULL; |
| 82 | } |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 83 | |
Jeremy Hylton | 5bc4abe | 1998-12-21 17:15:00 +0000 | [diff] [blame] | 84 | zst.zalloc=(alloc_func)NULL; |
Guido van Rossum | 97b5457 | 1997-06-03 22:21:47 +0000 | [diff] [blame] | 85 | zst.zfree=(free_func)Z_NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 86 | zst.next_out=(Byte *)output; |
| 87 | zst.next_in =(Byte *)input; |
| 88 | zst.avail_in=length; |
| 89 | err=deflateInit(&zst, level); |
| 90 | switch(err) |
| 91 | { |
| 92 | case(Z_OK): |
| 93 | break; |
| 94 | case(Z_MEM_ERROR): |
| 95 | PyErr_SetString(PyExc_MemoryError, |
| 96 | "Out of memory while compressing data"); |
| 97 | free(output); |
| 98 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 99 | case(Z_STREAM_ERROR): |
| 100 | PyErr_SetString(ZlibError, |
| 101 | "Bad compression level"); |
| 102 | free(output); |
| 103 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 104 | default: |
| 105 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 106 | if (zst.msg == Z_NULL) |
| 107 | PyErr_Format(ZlibError, "Error %i while compressing data", |
| 108 | err); |
| 109 | else |
| 110 | PyErr_Format(ZlibError, "Error %i while compressing data: %.200s", |
| 111 | err, zst.msg); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 112 | deflateEnd(&zst); |
| 113 | free(output); |
| 114 | return NULL; |
| 115 | } |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | err=deflate(&zst, Z_FINISH); |
| 119 | switch(err) |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 120 | { |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 121 | case(Z_STREAM_END): |
| 122 | break; |
| 123 | /* Are there other errors to be trapped here? */ |
| 124 | default: |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 125 | { |
| 126 | if (zst.msg == Z_NULL) |
| 127 | PyErr_Format(ZlibError, "Error %i while compressing data", |
| 128 | err); |
| 129 | else |
| 130 | PyErr_Format(ZlibError, "Error %i while compressing data: %.200s", |
| 131 | err, zst.msg); |
| 132 | deflateEnd(&zst); |
| 133 | free(output); |
| 134 | return NULL; |
| 135 | } |
| 136 | } |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 137 | err=deflateEnd(&zst); |
| 138 | if (err!=Z_OK) |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 139 | { |
| 140 | if (zst.msg == Z_NULL) |
| 141 | PyErr_Format(ZlibError, "Error %i while finishing compression", |
| 142 | err); |
| 143 | else |
| 144 | PyErr_Format(ZlibError, |
| 145 | "Error %i while finishing compression: %.200s", |
| 146 | err, zst.msg); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 147 | free(output); |
| 148 | return NULL; |
| 149 | } |
Guido van Rossum | 97b5457 | 1997-06-03 22:21:47 +0000 | [diff] [blame] | 150 | ReturnVal=PyString_FromStringAndSize((char *)output, zst.total_out); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 151 | free(output); |
| 152 | return ReturnVal; |
| 153 | } |
| 154 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 155 | static char decompress__doc__[] = |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 156 | "decompress(string) -- Decompress the data in string, returning a string containing the decompressed data.\n" |
| 157 | "decompress(string, wbits) -- Decompress the data in string with a window buffer size of wbits.\n" |
| 158 | "decompress(string, wbits, bufsize) -- Decompress the data in string with a window buffer size of wbits and an initial output buffer size of bufsize.\n" |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 159 | ; |
| 160 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 161 | static PyObject * |
| 162 | PyZlib_decompress(self, args) |
| 163 | PyObject *self; |
| 164 | PyObject *args; |
| 165 | { |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 166 | PyObject *result_str; |
| 167 | Byte *input; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 168 | int length, err; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 169 | int wsize=DEF_WBITS, r_strlen=DEFAULTALLOC; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 170 | z_stream zst; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 171 | if (!PyArg_ParseTuple(args, "s#|ii", &input, &length, &wsize, &r_strlen)) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 172 | return NULL; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 173 | |
| 174 | if (r_strlen <= 0) |
| 175 | r_strlen = 1; |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 176 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 177 | zst.avail_in=length; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 178 | zst.avail_out=r_strlen; |
| 179 | if (!(result_str = PyString_FromStringAndSize(NULL, r_strlen))) |
| 180 | { |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 181 | PyErr_SetString(PyExc_MemoryError, |
| 182 | "Can't allocate memory to decompress data"); |
| 183 | return NULL; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 184 | } |
Guido van Rossum | 97b5457 | 1997-06-03 22:21:47 +0000 | [diff] [blame] | 185 | zst.zalloc=(alloc_func)NULL; |
| 186 | zst.zfree=(free_func)Z_NULL; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 187 | zst.next_out=(Byte *)PyString_AsString(result_str); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 188 | zst.next_in =(Byte *)input; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 189 | err=inflateInit2(&zst, wsize); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 190 | switch(err) |
| 191 | { |
| 192 | case(Z_OK): |
| 193 | break; |
| 194 | case(Z_MEM_ERROR): |
| 195 | PyErr_SetString(PyExc_MemoryError, |
| 196 | "Out of memory while decompressing data"); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 197 | Py_DECREF(result_str); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 198 | return NULL; |
| 199 | default: |
| 200 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 201 | if (zst.msg == Z_NULL) |
| 202 | PyErr_Format(ZlibError, "Error %i preparing to decompress data", |
| 203 | err); |
| 204 | else |
| 205 | PyErr_Format(ZlibError, |
| 206 | "Error %i while preparing to decompress data: %.200s", |
| 207 | err, zst.msg); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 208 | inflateEnd(&zst); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 209 | Py_DECREF(result_str); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 210 | return NULL; |
| 211 | } |
| 212 | } |
| 213 | do |
| 214 | { |
| 215 | err=inflate(&zst, Z_FINISH); |
| 216 | switch(err) |
| 217 | { |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 218 | case(Z_STREAM_END): |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 219 | break; |
Guido van Rossum | 115f517 | 1998-04-23 20:22:11 +0000 | [diff] [blame] | 220 | case(Z_BUF_ERROR): |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 221 | case(Z_OK): |
| 222 | /* need more memory */ |
| 223 | if (_PyString_Resize(&result_str, r_strlen << 1) == -1) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 224 | { |
| 225 | PyErr_SetString(PyExc_MemoryError, |
| 226 | "Out of memory while decompressing data"); |
| 227 | inflateEnd(&zst); |
| 228 | return NULL; |
| 229 | } |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 230 | zst.next_out = (unsigned char *)PyString_AsString(result_str) + r_strlen; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 231 | zst.avail_out=r_strlen; |
| 232 | r_strlen = r_strlen << 1; |
| 233 | break; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 234 | default: |
| 235 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 236 | if (zst.msg == Z_NULL) |
| 237 | PyErr_Format(ZlibError, "Error %i while decompressing data", |
| 238 | err); |
| 239 | else |
| 240 | PyErr_Format(ZlibError, |
| 241 | "Error %i while decompressing data: %.200s", |
| 242 | err, zst.msg); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 243 | inflateEnd(&zst); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 244 | Py_DECREF(result_str); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 245 | return NULL; |
| 246 | } |
| 247 | } |
| 248 | } while(err!=Z_STREAM_END); |
| 249 | |
| 250 | err=inflateEnd(&zst); |
| 251 | if (err!=Z_OK) |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 252 | { |
| 253 | if (zst.msg == Z_NULL) |
| 254 | PyErr_Format(ZlibError, |
| 255 | "Error %i while finishing data decompression", |
| 256 | err); |
| 257 | else |
| 258 | PyErr_Format(ZlibError, |
| 259 | "Error %i while finishing data decompression: %.200s", |
| 260 | err, zst.msg); |
| 261 | Py_DECREF(result_str); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 262 | return NULL; |
| 263 | } |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 264 | _PyString_Resize(&result_str, zst.total_out); |
| 265 | return result_str; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | static PyObject * |
| 269 | PyZlib_compressobj(selfptr, args) |
| 270 | PyObject *selfptr; |
| 271 | PyObject *args; |
| 272 | { |
| 273 | compobject *self; |
| 274 | int level=Z_DEFAULT_COMPRESSION, method=DEFLATED; |
| 275 | int wbits=MAX_WBITS, memLevel=DEF_MEM_LEVEL, strategy=0, err; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 276 | |
| 277 | if (!PyArg_ParseTuple(args, "|iiiii", &level, &method, &wbits, |
| 278 | &memLevel, &strategy)) |
| 279 | return NULL; |
| 280 | |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 281 | self = newcompobject(&Comptype); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 282 | if (self==NULL) return(NULL); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 283 | self->zst.zalloc = (alloc_func)NULL; |
| 284 | self->zst.zfree = (free_func)Z_NULL; |
| 285 | err = deflateInit2(&self->zst, level, method, wbits, memLevel, strategy); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 286 | switch(err) |
| 287 | { |
| 288 | case (Z_OK): |
| 289 | return (PyObject*)self; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 290 | case (Z_MEM_ERROR): |
| 291 | PyErr_SetString(PyExc_MemoryError, |
| 292 | "Can't allocate memory for compression object"); |
| 293 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 294 | case(Z_STREAM_ERROR): |
| 295 | PyErr_SetString(PyExc_ValueError, |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 296 | "Invalid initialization option"); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 297 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 298 | default: |
| 299 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 300 | if (self->zst.msg == Z_NULL) |
| 301 | PyErr_Format(ZlibError, |
| 302 | "Error %i while creating compression object", |
| 303 | err); |
| 304 | else |
| 305 | PyErr_Format(ZlibError, |
| 306 | "Error %i while creating compression object: %.200s", |
| 307 | err, self->zst.msg); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 308 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 309 | } |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | static PyObject * |
| 314 | PyZlib_decompressobj(selfptr, args) |
| 315 | PyObject *selfptr; |
| 316 | PyObject *args; |
| 317 | { |
| 318 | int wbits=DEF_WBITS, err; |
| 319 | compobject *self; |
| 320 | if (!PyArg_ParseTuple(args, "|i", &wbits)) |
| 321 | { |
| 322 | return NULL; |
| 323 | } |
| 324 | self=newcompobject(&Decomptype); |
| 325 | if (self==NULL) return(NULL); |
Guido van Rossum | 97b5457 | 1997-06-03 22:21:47 +0000 | [diff] [blame] | 326 | self->zst.zalloc=(alloc_func)NULL; |
| 327 | self->zst.zfree=(free_func)Z_NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 328 | err=inflateInit2(&self->zst, wbits); |
| 329 | switch(err) |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 330 | { |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 331 | case (Z_OK): |
| 332 | return (PyObject*)self; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 333 | case(Z_STREAM_ERROR): |
| 334 | PyErr_SetString(PyExc_ValueError, |
| 335 | "Invalid initialization option"); |
| 336 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 337 | case (Z_MEM_ERROR): |
| 338 | PyErr_SetString(PyExc_MemoryError, |
| 339 | "Can't allocate memory for decompression object"); |
| 340 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 341 | default: |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 342 | { |
| 343 | if (self->zst.msg == Z_NULL) |
| 344 | PyErr_Format(ZlibError, |
| 345 | "Error %i while creating decompression object", |
| 346 | err); |
| 347 | else |
| 348 | PyErr_Format(ZlibError, |
| 349 | "Error %i while creating decompression object: %.200s", |
| 350 | err, self->zst.msg); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 351 | return NULL; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 352 | } |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 353 | } |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | static void |
| 357 | Comp_dealloc(self) |
| 358 | compobject *self; |
| 359 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 360 | deflateEnd(&self->zst); |
| 361 | PyMem_DEL(self); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | static void |
| 365 | Decomp_dealloc(self) |
| 366 | compobject *self; |
| 367 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 368 | inflateEnd(&self->zst); |
| 369 | PyMem_DEL(self); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 370 | } |
| 371 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 372 | static char comp_compress__doc__[] = |
| 373 | "compress(data) -- Return a string containing a compressed version of the data.\n\n" |
| 374 | "After calling this function, some of the input data may still\n" |
| 375 | "be stored in internal buffers for later processing.\n" |
| 376 | "Call the flush() method to clear these buffers." |
| 377 | ; |
| 378 | |
| 379 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 380 | static PyObject * |
| 381 | PyZlib_objcompress(self, args) |
| 382 | compobject *self; |
| 383 | PyObject *args; |
| 384 | { |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 385 | int err = Z_OK, inplen; |
| 386 | int length = DEFAULTALLOC; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 387 | PyObject *RetVal; |
| 388 | Byte *input; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 389 | unsigned long start_total_out; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 390 | |
| 391 | if (!PyArg_ParseTuple(args, "s#", &input, &inplen)) |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 392 | return NULL; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 393 | self->zst.avail_in = inplen; |
| 394 | self->zst.next_in = input; |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 395 | if (!(RetVal = PyString_FromStringAndSize(NULL, length))) { |
| 396 | PyErr_SetString(PyExc_MemoryError, |
| 397 | "Can't allocate memory to compress data"); |
| 398 | return NULL; |
| 399 | } |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 400 | start_total_out = self->zst.total_out; |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 401 | self->zst.next_out = (unsigned char *)PyString_AsString(RetVal); |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 402 | self->zst.avail_out = length; |
| 403 | while (self->zst.avail_in != 0 && err == Z_OK) |
| 404 | { |
| 405 | err = deflate(&(self->zst), Z_NO_FLUSH); |
| 406 | if (self->zst.avail_out <= 0) { |
| 407 | if (_PyString_Resize(&RetVal, length << 1) == -1) { |
| 408 | PyErr_SetString(PyExc_MemoryError, |
| 409 | "Can't allocate memory to compress data"); |
| 410 | return NULL; |
| 411 | } |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 412 | self->zst.next_out = (unsigned char *)PyString_AsString(RetVal) + length; |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 413 | self->zst.avail_out = length; |
| 414 | length = length << 1; |
| 415 | } |
| 416 | } |
| 417 | if (err != Z_OK) |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 418 | { |
| 419 | if (self->zst.msg == Z_NULL) |
| 420 | PyErr_Format(ZlibError, "Error %i while compressing", |
| 421 | err); |
| 422 | else |
| 423 | PyErr_Format(ZlibError, "Error %i while compressing: %.200s", |
| 424 | err, self->zst.msg); |
| 425 | Py_DECREF(RetVal); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 426 | return NULL; |
| 427 | } |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 428 | _PyString_Resize(&RetVal, self->zst.total_out - start_total_out); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 429 | return RetVal; |
| 430 | } |
| 431 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 432 | static char decomp_decompress__doc__[] = |
| 433 | "decompress(data) -- Return a string containing the decompressed version of the data.\n\n" |
| 434 | "After calling this function, some of the input data may still\n" |
| 435 | "be stored in internal buffers for later processing.\n" |
| 436 | "Call the flush() method to clear these buffers." |
| 437 | ; |
| 438 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 439 | static PyObject * |
| 440 | PyZlib_objdecompress(self, args) |
| 441 | compobject *self; |
| 442 | PyObject *args; |
| 443 | { |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 444 | int length, err, inplen; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 445 | PyObject *RetVal; |
| 446 | Byte *input; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 447 | unsigned long start_total_out; |
| 448 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 449 | if (!PyArg_ParseTuple(args, "s#", &input, &inplen)) |
| 450 | return NULL; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 451 | start_total_out = self->zst.total_out; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 452 | RetVal = PyString_FromStringAndSize(NULL, DEFAULTALLOC); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 453 | self->zst.avail_in = inplen; |
| 454 | self->zst.next_in = input; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 455 | self->zst.avail_out = length = DEFAULTALLOC; |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 456 | self->zst.next_out = (unsigned char *)PyString_AsString(RetVal); |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 457 | err = Z_OK; |
Jeremy Hylton | a74ef66 | 1997-08-13 21:39:18 +0000 | [diff] [blame] | 458 | |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 459 | while (self->zst.avail_in != 0 && err == Z_OK) |
| 460 | { |
| 461 | err = inflate(&(self->zst), Z_NO_FLUSH); |
| 462 | if (err == Z_OK && self->zst.avail_out <= 0) |
| 463 | { |
| 464 | if (_PyString_Resize(&RetVal, length << 1) == -1) |
| 465 | { |
| 466 | PyErr_SetString(PyExc_MemoryError, |
| 467 | "Can't allocate memory to compress data"); |
| 468 | return NULL; |
| 469 | } |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 470 | self->zst.next_out = (unsigned char *)PyString_AsString(RetVal) + length; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 471 | self->zst.avail_out = length; |
| 472 | length = length << 1; |
| 473 | } |
| 474 | } |
| 475 | |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 476 | if (err != Z_OK && err != Z_STREAM_END) |
| 477 | { |
| 478 | if (self->zst.msg == Z_NULL) |
| 479 | PyErr_Format(ZlibError, "Error %i while decompressing", |
| 480 | err); |
| 481 | else |
| 482 | PyErr_Format(ZlibError, "Error %i while decompressing: %.200s", |
| 483 | err, self->zst.msg); |
| 484 | Py_DECREF(RetVal); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 485 | return NULL; |
| 486 | } |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 487 | _PyString_Resize(&RetVal, self->zst.total_out - start_total_out); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 488 | return RetVal; |
| 489 | } |
| 490 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 491 | static char comp_flush__doc__[] = |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 492 | "flush( [mode] ) -- Return a string containing any remaining compressed data.\n" |
| 493 | "mode can be one of the constants Z_SYNC_FLUSH, Z_FULL_FLUSH, Z_FINISH; the \n" |
| 494 | "default value used when mode is not specified is Z_FINISH.\n" |
| 495 | "If mode == Z_FINISH, the compressor object can no longer be used after\n" |
| 496 | "calling the flush() method. Otherwise, more data can still be compressed.\n" |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 497 | ; |
| 498 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 499 | static PyObject * |
| 500 | PyZlib_flush(self, args) |
| 501 | compobject *self; |
| 502 | PyObject *args; |
| 503 | { |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 504 | int length=DEFAULTALLOC, err = Z_OK; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 505 | PyObject *RetVal; |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 506 | int flushmode = Z_FINISH; |
| 507 | unsigned long start_total_out; |
| 508 | |
| 509 | if (!PyArg_ParseTuple(args, "|i", &flushmode)) |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 510 | return NULL; |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 511 | |
| 512 | /* Flushing with Z_NO_FLUSH is a no-op, so there's no point in |
| 513 | doing any work at all; just return an empty string. */ |
| 514 | if (flushmode == Z_NO_FLUSH) |
| 515 | { |
| 516 | return PyString_FromStringAndSize(NULL, 0); |
| 517 | } |
| 518 | |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 519 | self->zst.avail_in = 0; |
| 520 | self->zst.next_in = Z_NULL; |
| 521 | if (!(RetVal = PyString_FromStringAndSize(NULL, length))) { |
| 522 | PyErr_SetString(PyExc_MemoryError, |
| 523 | "Can't allocate memory to compress data"); |
| 524 | return NULL; |
| 525 | } |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 526 | start_total_out = self->zst.total_out; |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 527 | self->zst.next_out = (unsigned char *)PyString_AsString(RetVal); |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 528 | self->zst.avail_out = length; |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 529 | |
| 530 | /* When flushing the zstream, there's no input data. |
| 531 | If zst.avail_out == 0, that means that more output space is |
| 532 | needed to complete the flush operation. */ |
Jeremy Hylton | 6892aa3 | 1999-01-06 22:56:24 +0000 | [diff] [blame] | 533 | while (err == Z_OK) { |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 534 | err = deflate(&(self->zst), Z_FINISH); |
| 535 | if (self->zst.avail_out <= 0) { |
| 536 | if (_PyString_Resize(&RetVal, length << 1) == -1) { |
| 537 | PyErr_SetString(PyExc_MemoryError, |
| 538 | "Can't allocate memory to compress data"); |
| 539 | return NULL; |
| 540 | } |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 541 | self->zst.next_out = (unsigned char *)PyString_AsString(RetVal) + length; |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 542 | self->zst.avail_out = length; |
| 543 | length = length << 1; |
| 544 | } |
Jeremy Hylton | 6892aa3 | 1999-01-06 22:56:24 +0000 | [diff] [blame] | 545 | } |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 546 | |
Jeremy Hylton | 6892aa3 | 1999-01-06 22:56:24 +0000 | [diff] [blame] | 547 | if (err != Z_STREAM_END) |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 548 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 549 | if (self->zst.msg == Z_NULL) |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 550 | PyErr_Format(ZlibError, "Error %i while flushing", |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 551 | err); |
| 552 | else |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 553 | PyErr_Format(ZlibError, "Error %i while flushing: %.200s", |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 554 | err, self->zst.msg); |
| 555 | Py_DECREF(RetVal); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 556 | return NULL; |
Jeremy Hylton | 6892aa3 | 1999-01-06 22:56:24 +0000 | [diff] [blame] | 557 | } |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 558 | if (flushmode == Z_FINISH) { |
| 559 | err=deflateEnd(&(self->zst)); |
| 560 | if (err!=Z_OK) { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 561 | if (self->zst.msg == Z_NULL) |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 562 | PyErr_Format(ZlibError, "Error %i from deflateEnd()", |
| 563 | err); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 564 | else |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 565 | PyErr_Format(ZlibError, |
| 566 | "Error %i from deflateEnd(): %.200s", |
| 567 | err, self->zst.msg); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 568 | Py_DECREF(RetVal); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 569 | return NULL; |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 570 | } |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 571 | } |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 572 | _PyString_Resize(&RetVal, self->zst.total_out - start_total_out); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 573 | return RetVal; |
| 574 | } |
| 575 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 576 | static char decomp_flush__doc__[] = |
| 577 | "flush() -- Return a string containing any remaining decompressed data. " |
| 578 | "The decompressor object can no longer be used after this call." |
| 579 | ; |
| 580 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 581 | static PyObject * |
| 582 | PyZlib_unflush(self, args) |
| 583 | compobject *self; |
| 584 | PyObject *args; |
| 585 | { |
| 586 | int length=0, err; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 587 | PyObject *RetVal; |
| 588 | |
| 589 | if (!PyArg_NoArgs(args)) |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 590 | return NULL; |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 591 | if (!(RetVal = PyString_FromStringAndSize(NULL, DEFAULTALLOC))) |
| 592 | { |
| 593 | PyErr_SetString(PyExc_MemoryError, |
| 594 | "Can't allocate memory to decompress data"); |
| 595 | return NULL; |
| 596 | } |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 597 | self->zst.avail_in=0; |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 598 | self->zst.next_out = (unsigned char *)PyString_AsString(RetVal); |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 599 | length = self->zst.avail_out = DEFAULTALLOC; |
| 600 | |
| 601 | err = Z_OK; |
| 602 | while (err == Z_OK) |
| 603 | { |
| 604 | err = inflate(&(self->zst), Z_FINISH); |
| 605 | if (err == Z_OK && self->zst.avail_out == 0) |
| 606 | { |
| 607 | if (_PyString_Resize(&RetVal, length << 1) == -1) |
| 608 | { |
| 609 | PyErr_SetString(PyExc_MemoryError, |
| 610 | "Can't allocate memory to decompress data"); |
| 611 | return NULL; |
| 612 | } |
Guido van Rossum | ed2554a | 1997-08-18 15:31:24 +0000 | [diff] [blame] | 613 | self->zst.next_out = (unsigned char *)PyString_AsString(RetVal) + length; |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 614 | self->zst.avail_out = length; |
| 615 | length = length << 1; |
| 616 | } |
| 617 | } |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 618 | if (err!=Z_STREAM_END) |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 619 | { |
| 620 | if (self->zst.msg == Z_NULL) |
| 621 | PyErr_Format(ZlibError, "Error %i while decompressing", |
| 622 | err); |
| 623 | else |
| 624 | PyErr_Format(ZlibError, "Error %i while decompressing: %.200s", |
| 625 | err, self->zst.msg); |
| 626 | Py_DECREF(RetVal); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 627 | return NULL; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 628 | } |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 629 | err=inflateEnd(&(self->zst)); |
| 630 | if (err!=Z_OK) |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 631 | { |
| 632 | if (self->zst.msg == Z_NULL) |
| 633 | PyErr_Format(ZlibError, |
| 634 | "Error %i while flushing decompression object", |
| 635 | err); |
| 636 | else |
| 637 | PyErr_Format(ZlibError, |
| 638 | "Error %i while flushing decompression object: %.200s", |
| 639 | err, self->zst.msg); |
| 640 | Py_DECREF(RetVal); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 641 | return NULL; |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 642 | } |
Jeremy Hylton | 644c17d | 1997-08-14 21:06:42 +0000 | [diff] [blame] | 643 | _PyString_Resize(&RetVal, |
| 644 | (char *)self->zst.next_out - PyString_AsString(RetVal)); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 645 | return RetVal; |
| 646 | } |
| 647 | |
| 648 | static PyMethodDef comp_methods[] = |
| 649 | { |
Guido van Rossum | c1f0882 | 1997-08-28 21:21:22 +0000 | [diff] [blame] | 650 | {"compress", (binaryfunc)PyZlib_objcompress, 1, comp_compress__doc__}, |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 651 | {"flush", (binaryfunc)PyZlib_flush, 1, comp_flush__doc__}, |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 652 | {NULL, NULL} |
| 653 | }; |
| 654 | |
| 655 | static PyMethodDef Decomp_methods[] = |
| 656 | { |
Guido van Rossum | c1f0882 | 1997-08-28 21:21:22 +0000 | [diff] [blame] | 657 | {"decompress", (binaryfunc)PyZlib_objdecompress, 1, decomp_decompress__doc__}, |
| 658 | {"flush", (binaryfunc)PyZlib_unflush, 0, decomp_flush__doc__}, |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 659 | {NULL, NULL} |
| 660 | }; |
| 661 | |
| 662 | static PyObject * |
| 663 | Comp_getattr(self, name) |
| 664 | compobject *self; |
| 665 | char *name; |
| 666 | { |
| 667 | return Py_FindMethod(comp_methods, (PyObject *)self, name); |
| 668 | } |
| 669 | |
| 670 | static PyObject * |
| 671 | Decomp_getattr(self, name) |
| 672 | compobject *self; |
| 673 | char *name; |
| 674 | { |
| 675 | return Py_FindMethod(Decomp_methods, (PyObject *)self, name); |
| 676 | } |
| 677 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 678 | static char adler32__doc__[] = |
| 679 | "adler32(string) -- Compute an Adler-32 checksum of string, using " |
| 680 | "a default starting value, and returning an integer value.\n" |
| 681 | "adler32(string, value) -- Compute an Adler-32 checksum of string, using " |
| 682 | "the starting value provided, and returning an integer value\n" |
| 683 | ; |
| 684 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 685 | static PyObject * |
| 686 | PyZlib_adler32(self, args) |
| 687 | PyObject *self, *args; |
| 688 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 689 | uLong adler32val=adler32(0L, Z_NULL, 0); |
| 690 | Byte *buf; |
| 691 | int len; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 692 | |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 693 | if (!PyArg_ParseTuple(args, "s#|l", &buf, &len, &adler32val)) |
| 694 | { |
| 695 | return NULL; |
| 696 | } |
| 697 | adler32val = adler32(adler32val, buf, len); |
| 698 | return PyInt_FromLong(adler32val); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 699 | } |
| 700 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 701 | static char crc32__doc__[] = |
| 702 | "crc32(string) -- Compute a CRC-32 checksum of string, using " |
| 703 | "a default starting value, and returning an integer value.\n" |
| 704 | "crc32(string, value) -- Compute a CRC-32 checksum of string, using " |
| 705 | "the starting value provided, and returning an integer value.\n" |
| 706 | ; |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 707 | |
| 708 | static PyObject * |
| 709 | PyZlib_crc32(self, args) |
| 710 | PyObject *self, *args; |
| 711 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 712 | uLong crc32val=crc32(0L, Z_NULL, 0); |
| 713 | Byte *buf; |
| 714 | int len; |
| 715 | if (!PyArg_ParseTuple(args, "s#|l", &buf, &len, &crc32val)) |
| 716 | { |
| 717 | return NULL; |
| 718 | } |
| 719 | crc32val = crc32(crc32val, buf, len); |
| 720 | return PyInt_FromLong(crc32val); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | |
| 724 | static PyMethodDef zlib_methods[] = |
| 725 | { |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 726 | {"adler32", (PyCFunction)PyZlib_adler32, 1, adler32__doc__}, |
| 727 | {"compress", (PyCFunction)PyZlib_compress, 1, compress__doc__}, |
| 728 | {"compressobj", (PyCFunction)PyZlib_compressobj, 1, compressobj__doc__}, |
| 729 | {"crc32", (PyCFunction)PyZlib_crc32, 1, crc32__doc__}, |
| 730 | {"decompress", (PyCFunction)PyZlib_decompress, 1, decompress__doc__}, |
| 731 | {"decompressobj", (PyCFunction)PyZlib_decompressobj, 1, decompressobj__doc__}, |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 732 | {NULL, NULL} |
| 733 | }; |
| 734 | |
| 735 | statichere PyTypeObject Comptype = { |
Guido van Rossum | 9ec0f8b | 1997-12-18 05:21:29 +0000 | [diff] [blame] | 736 | PyObject_HEAD_INIT(0) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 737 | 0, |
| 738 | "Compress", |
| 739 | sizeof(compobject), |
| 740 | 0, |
| 741 | (destructor)Comp_dealloc, /*tp_dealloc*/ |
| 742 | 0, /*tp_print*/ |
| 743 | (getattrfunc)Comp_getattr, /*tp_getattr*/ |
| 744 | 0, /*tp_setattr*/ |
| 745 | 0, /*tp_compare*/ |
| 746 | 0, /*tp_repr*/ |
| 747 | 0, /*tp_as_number*/ |
| 748 | 0, /*tp_as_sequence*/ |
| 749 | 0, /*tp_as_mapping*/ |
| 750 | }; |
| 751 | |
| 752 | statichere PyTypeObject Decomptype = { |
Guido van Rossum | 9ec0f8b | 1997-12-18 05:21:29 +0000 | [diff] [blame] | 753 | PyObject_HEAD_INIT(0) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 754 | 0, |
| 755 | "Decompress", |
| 756 | sizeof(compobject), |
| 757 | 0, |
| 758 | (destructor)Decomp_dealloc, /*tp_dealloc*/ |
| 759 | 0, /*tp_print*/ |
| 760 | (getattrfunc)Decomp_getattr, /*tp_getattr*/ |
| 761 | 0, /*tp_setattr*/ |
| 762 | 0, /*tp_compare*/ |
| 763 | 0, /*tp_repr*/ |
| 764 | 0, /*tp_as_number*/ |
| 765 | 0, /*tp_as_sequence*/ |
| 766 | 0, /*tp_as_mapping*/ |
| 767 | }; |
| 768 | |
| 769 | /* The following insint() routine was blatantly ripped off from |
| 770 | socketmodule.c */ |
| 771 | |
| 772 | /* Convenience routine to export an integer value. |
| 773 | For simplicity, errors (which are unlikely anyway) are ignored. */ |
| 774 | static void |
| 775 | insint(d, name, value) |
| 776 | PyObject *d; |
| 777 | char *name; |
| 778 | int value; |
| 779 | { |
| 780 | PyObject *v = PyInt_FromLong((long) value); |
| 781 | if (v == NULL) { |
| 782 | /* Don't bother reporting this error */ |
| 783 | PyErr_Clear(); |
| 784 | } |
| 785 | else { |
| 786 | PyDict_SetItemString(d, name, v); |
| 787 | Py_DECREF(v); |
| 788 | } |
| 789 | } |
| 790 | |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 791 | static char zlib_module_documentation[]= |
| 792 | "The functions in this module allow compression and decompression " |
| 793 | "using the zlib library, which is based on GNU zip. \n\n" |
| 794 | "adler32(string) -- Compute an Adler-32 checksum.\n" |
| 795 | "adler32(string, start) -- Compute an Adler-32 checksum using a given starting value.\n" |
| 796 | "compress(string) -- Compress a string.\n" |
| 797 | "compress(string, level) -- Compress a string with the given level of compression (1--9).\n" |
| 798 | "compressobj([level]) -- Return a compressor object.\n" |
| 799 | "crc32(string) -- Compute a CRC-32 checksum.\n" |
| 800 | "crc32(string, start) -- Compute a CRC-32 checksum using a given starting value.\n" |
Jeremy Hylton | 41b9f00 | 1997-08-13 23:19:55 +0000 | [diff] [blame] | 801 | "decompress(string,[wbites],[bufsize]) -- Decompresses a compressed string.\n" |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 802 | "decompressobj([wbits]) -- Return a decompressor object (wbits=window buffer size).\n\n" |
| 803 | "Compressor objects support compress() and flush() methods; decompressor \n" |
| 804 | "objects support decompress() and flush()." |
| 805 | ; |
| 806 | |
Guido van Rossum | 3886bb6 | 1998-12-04 18:50:17 +0000 | [diff] [blame] | 807 | DL_EXPORT(void) |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 808 | PyInit_zlib() |
| 809 | { |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 810 | PyObject *m, *d, *ver; |
Guido van Rossum | 9ec0f8b | 1997-12-18 05:21:29 +0000 | [diff] [blame] | 811 | Comptype.ob_type = &PyType_Type; |
| 812 | Decomptype.ob_type = &PyType_Type; |
Guido van Rossum | 3c54030 | 1997-06-03 22:21:03 +0000 | [diff] [blame] | 813 | m = Py_InitModule4("zlib", zlib_methods, |
| 814 | zlib_module_documentation, |
| 815 | (PyObject*)NULL,PYTHON_API_VERSION); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 816 | d = PyModule_GetDict(m); |
Guido van Rossum | 0cb96de | 1997-10-01 04:29:29 +0000 | [diff] [blame] | 817 | ZlibError = PyErr_NewException("zlib.error", NULL, NULL); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 818 | PyDict_SetItemString(d, "error", ZlibError); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 819 | |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 820 | insint(d, "MAX_WBITS", MAX_WBITS); |
| 821 | insint(d, "DEFLATED", DEFLATED); |
| 822 | insint(d, "DEF_MEM_LEVEL", DEF_MEM_LEVEL); |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 823 | insint(d, "Z_BEST_SPEED", Z_BEST_SPEED); |
| 824 | insint(d, "Z_BEST_COMPRESSION", Z_BEST_COMPRESSION); |
| 825 | insint(d, "Z_DEFAULT_COMPRESSION", Z_DEFAULT_COMPRESSION); |
| 826 | insint(d, "Z_FILTERED", Z_FILTERED); |
| 827 | insint(d, "Z_HUFFMAN_ONLY", Z_HUFFMAN_ONLY); |
| 828 | insint(d, "Z_DEFAULT_STRATEGY", Z_DEFAULT_STRATEGY); |
Jeremy Hylton | a37e244 | 1998-12-18 22:13:11 +0000 | [diff] [blame] | 829 | |
| 830 | insint(d, "Z_FINISH", Z_FINISH); |
| 831 | insint(d, "Z_NO_FLUSH", Z_NO_FLUSH); |
| 832 | insint(d, "Z_SYNC_FLUSH", Z_SYNC_FLUSH); |
| 833 | insint(d, "Z_FULL_FLUSH", Z_FULL_FLUSH); |
| 834 | |
Jeremy Hylton | cb91404 | 1997-09-04 23:39:23 +0000 | [diff] [blame] | 835 | ver = PyString_FromString(ZLIB_VERSION); |
| 836 | PyDict_SetItemString(d, "ZLIB_VERSION", ver); |
Guido van Rossum | fb22156 | 1997-04-29 15:38:09 +0000 | [diff] [blame] | 837 | } |