Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 1 | /* ------------------------------------------------------------------------ |
| 2 | |
| 3 | Python Codec Registry and support functions |
| 4 | |
| 5 | Written by Marc-Andre Lemburg (mal@lemburg.com). |
| 6 | |
Guido van Rossum | 16b1ad9 | 2000-08-03 16:24:25 +0000 | [diff] [blame] | 7 | Copyright (c) Corporation for National Research Initiatives. |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 8 | |
| 9 | ------------------------------------------------------------------------ */ |
| 10 | |
| 11 | #include "Python.h" |
| 12 | #include <ctype.h> |
| 13 | |
| 14 | /* --- Globals ------------------------------------------------------------ */ |
| 15 | |
| 16 | static PyObject *_PyCodec_SearchPath; |
| 17 | static PyObject *_PyCodec_SearchCache; |
| 18 | |
| 19 | /* Flag used for lazy import of the standard encodings package */ |
| 20 | static int import_encodings_called = 0; |
| 21 | |
| 22 | /* --- Codec Registry ----------------------------------------------------- */ |
| 23 | |
| 24 | /* Import the standard encodings package which will register the first |
| 25 | codec search function. |
| 26 | |
| 27 | This is done in a lazy way so that the Unicode implementation does |
| 28 | not downgrade startup time of scripts not needing it. |
| 29 | |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 30 | ImportErrors are silently ignored by this function. Only one try is |
| 31 | made. |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 32 | |
| 33 | */ |
| 34 | |
| 35 | static |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 36 | int import_encodings(void) |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 37 | { |
| 38 | PyObject *mod; |
| 39 | |
| 40 | import_encodings_called = 1; |
| 41 | mod = PyImport_ImportModule("encodings"); |
| 42 | if (mod == NULL) { |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 43 | if (PyErr_ExceptionMatches(PyExc_ImportError)) { |
| 44 | /* Ignore ImportErrors... this is done so that |
| 45 | distributions can disable the encodings package. Note |
| 46 | that other errors are not masked, e.g. SystemErrors |
| 47 | raised to inform the user of an error in the Python |
| 48 | configuration are still reported back to the user. */ |
| 49 | PyErr_Clear(); |
| 50 | return 0; |
| 51 | } |
| 52 | return -1; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 53 | } |
| 54 | Py_DECREF(mod); |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 55 | return 0; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 56 | } |
| 57 | |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 58 | int PyCodec_Register(PyObject *search_function) |
| 59 | { |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 60 | if (!import_encodings_called) { |
| 61 | if (import_encodings()) |
| 62 | goto onError; |
| 63 | } |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 64 | if (search_function == NULL) { |
| 65 | PyErr_BadArgument(); |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 66 | goto onError; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 67 | } |
| 68 | if (!PyCallable_Check(search_function)) { |
| 69 | PyErr_SetString(PyExc_TypeError, |
| 70 | "argument must be callable"); |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 71 | goto onError; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 72 | } |
| 73 | return PyList_Append(_PyCodec_SearchPath, search_function); |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 74 | |
| 75 | onError: |
| 76 | return -1; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 77 | } |
| 78 | |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 79 | /* Convert a string to a normalized Python string: all characters are |
| 80 | converted to lower case, spaces are replaced with underscores. */ |
| 81 | |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 82 | static |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 83 | PyObject *normalizestring(const char *string) |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 84 | { |
Guido van Rossum | 3383113 | 2000-06-29 14:50:15 +0000 | [diff] [blame] | 85 | register size_t i; |
Guido van Rossum | 582acec | 2000-06-28 22:07:35 +0000 | [diff] [blame] | 86 | size_t len = strlen(string); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 87 | char *p; |
| 88 | PyObject *v; |
| 89 | |
Guido van Rossum | 582acec | 2000-06-28 22:07:35 +0000 | [diff] [blame] | 90 | if (len > INT_MAX) { |
| 91 | PyErr_SetString(PyExc_OverflowError, "string is too large"); |
| 92 | return NULL; |
| 93 | } |
| 94 | |
| 95 | v = PyString_FromStringAndSize(NULL, (int)len); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 96 | if (v == NULL) |
| 97 | return NULL; |
| 98 | p = PyString_AS_STRING(v); |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 99 | for (i = 0; i < len; i++) { |
| 100 | register char ch = string[i]; |
| 101 | if (ch == ' ') |
| 102 | ch = '-'; |
| 103 | else |
| 104 | ch = tolower(ch); |
| 105 | p[i] = ch; |
| 106 | } |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 107 | return v; |
| 108 | } |
| 109 | |
| 110 | /* Lookup the given encoding and return a tuple providing the codec |
| 111 | facilities. |
| 112 | |
| 113 | The encoding string is looked up converted to all lower-case |
| 114 | characters. This makes encodings looked up through this mechanism |
| 115 | effectively case-insensitive. |
| 116 | |
Fred Drake | 766de83 | 2000-05-09 19:55:59 +0000 | [diff] [blame] | 117 | If no codec is found, a LookupError is set and NULL returned. |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 118 | |
| 119 | As side effect, this tries to load the encodings package, if not |
| 120 | yet done. This is part of the lazy load strategy for the encodings |
| 121 | package. |
| 122 | |
| 123 | */ |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 124 | |
| 125 | PyObject *_PyCodec_Lookup(const char *encoding) |
| 126 | { |
Guido van Rossum | 5ba3c84 | 2000-03-24 20:52:23 +0000 | [diff] [blame] | 127 | PyObject *result, *args = NULL, *v; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 128 | int i, len; |
| 129 | |
Fred Drake | 766de83 | 2000-05-09 19:55:59 +0000 | [diff] [blame] | 130 | if (encoding == NULL) { |
| 131 | PyErr_BadArgument(); |
| 132 | goto onError; |
| 133 | } |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 134 | if (_PyCodec_SearchCache == NULL || |
| 135 | _PyCodec_SearchPath == NULL) { |
Barry Warsaw | 51ac580 | 2000-03-20 16:36:48 +0000 | [diff] [blame] | 136 | PyErr_SetString(PyExc_SystemError, |
| 137 | "codec module not properly initialized"); |
| 138 | goto onError; |
| 139 | } |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 140 | if (!import_encodings_called) { |
| 141 | if (import_encodings()) |
| 142 | goto onError; |
| 143 | } |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 144 | |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 145 | /* Convert the encoding to a normalized Python string: all |
Thomas Wouters | 7e47402 | 2000-07-16 12:04:32 +0000 | [diff] [blame] | 146 | characters are converted to lower case, spaces and hyphens are |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 147 | replaced with underscores. */ |
| 148 | v = normalizestring(encoding); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 149 | if (v == NULL) |
| 150 | goto onError; |
| 151 | PyString_InternInPlace(&v); |
| 152 | |
| 153 | /* First, try to lookup the name in the registry dictionary */ |
| 154 | result = PyDict_GetItem(_PyCodec_SearchCache, v); |
| 155 | if (result != NULL) { |
| 156 | Py_INCREF(result); |
Barry Warsaw | 51ac580 | 2000-03-20 16:36:48 +0000 | [diff] [blame] | 157 | Py_DECREF(v); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 158 | return result; |
| 159 | } |
| 160 | |
| 161 | /* Next, scan the search functions in order of registration */ |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 162 | args = PyTuple_New(1); |
| 163 | if (args == NULL) |
| 164 | goto onError; |
| 165 | PyTuple_SET_ITEM(args,0,v); |
Guido van Rossum | 5ba3c84 | 2000-03-24 20:52:23 +0000 | [diff] [blame] | 166 | |
| 167 | len = PyList_Size(_PyCodec_SearchPath); |
| 168 | if (len < 0) |
| 169 | goto onError; |
Guido van Rossum | b95de4f | 2000-03-31 17:25:23 +0000 | [diff] [blame] | 170 | if (len == 0) { |
| 171 | PyErr_SetString(PyExc_LookupError, |
| 172 | "no codec search functions registered: " |
| 173 | "can't find encoding"); |
| 174 | goto onError; |
| 175 | } |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 176 | |
| 177 | for (i = 0; i < len; i++) { |
| 178 | PyObject *func; |
| 179 | |
| 180 | func = PyList_GetItem(_PyCodec_SearchPath, i); |
| 181 | if (func == NULL) |
| 182 | goto onError; |
Guido van Rossum | 5ba3c84 | 2000-03-24 20:52:23 +0000 | [diff] [blame] | 183 | result = PyEval_CallObject(func, args); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 184 | if (result == NULL) |
| 185 | goto onError; |
| 186 | if (result == Py_None) { |
| 187 | Py_DECREF(result); |
| 188 | continue; |
| 189 | } |
| 190 | if (!PyTuple_Check(result) || PyTuple_GET_SIZE(result) != 4) { |
| 191 | PyErr_SetString(PyExc_TypeError, |
| 192 | "codec search functions must return 4-tuples"); |
| 193 | Py_DECREF(result); |
| 194 | goto onError; |
| 195 | } |
| 196 | break; |
| 197 | } |
| 198 | if (i == len) { |
| 199 | /* XXX Perhaps we should cache misses too ? */ |
Martin v. Löwis | eb42b02 | 2002-09-26 16:01:24 +0000 | [diff] [blame] | 200 | PyErr_Format(PyExc_LookupError, |
| 201 | "unknown encoding: %s", encoding); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 202 | goto onError; |
| 203 | } |
| 204 | |
| 205 | /* Cache and return the result */ |
| 206 | PyDict_SetItem(_PyCodec_SearchCache, v, result); |
| 207 | Py_DECREF(args); |
| 208 | return result; |
| 209 | |
| 210 | onError: |
| 211 | Py_XDECREF(args); |
| 212 | return NULL; |
| 213 | } |
| 214 | |
| 215 | static |
| 216 | PyObject *args_tuple(PyObject *object, |
| 217 | const char *errors) |
| 218 | { |
| 219 | PyObject *args; |
| 220 | |
| 221 | args = PyTuple_New(1 + (errors != NULL)); |
| 222 | if (args == NULL) |
| 223 | return NULL; |
| 224 | Py_INCREF(object); |
| 225 | PyTuple_SET_ITEM(args,0,object); |
| 226 | if (errors) { |
| 227 | PyObject *v; |
| 228 | |
| 229 | v = PyString_FromString(errors); |
| 230 | if (v == NULL) { |
| 231 | Py_DECREF(args); |
| 232 | return NULL; |
| 233 | } |
| 234 | PyTuple_SET_ITEM(args, 1, v); |
| 235 | } |
| 236 | return args; |
| 237 | } |
| 238 | |
| 239 | /* Build a codec by calling factory(stream[,errors]) or just |
| 240 | factory(errors) depending on whether the given parameters are |
| 241 | non-NULL. */ |
| 242 | |
| 243 | static |
| 244 | PyObject *build_stream_codec(PyObject *factory, |
| 245 | PyObject *stream, |
| 246 | const char *errors) |
| 247 | { |
| 248 | PyObject *args, *codec; |
| 249 | |
| 250 | args = args_tuple(stream, errors); |
| 251 | if (args == NULL) |
| 252 | return NULL; |
| 253 | |
| 254 | codec = PyEval_CallObject(factory, args); |
| 255 | Py_DECREF(args); |
| 256 | return codec; |
| 257 | } |
| 258 | |
| 259 | /* Convenience APIs to query the Codec registry. |
| 260 | |
| 261 | All APIs return a codec object with incremented refcount. |
| 262 | |
| 263 | */ |
| 264 | |
| 265 | PyObject *PyCodec_Encoder(const char *encoding) |
| 266 | { |
| 267 | PyObject *codecs; |
| 268 | PyObject *v; |
| 269 | |
| 270 | codecs = _PyCodec_Lookup(encoding); |
| 271 | if (codecs == NULL) |
| 272 | goto onError; |
| 273 | v = PyTuple_GET_ITEM(codecs,0); |
Mark Hammond | e21262c | 2002-07-18 23:06:17 +0000 | [diff] [blame] | 274 | Py_DECREF(codecs); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 275 | Py_INCREF(v); |
| 276 | return v; |
| 277 | |
| 278 | onError: |
| 279 | return NULL; |
| 280 | } |
| 281 | |
| 282 | PyObject *PyCodec_Decoder(const char *encoding) |
| 283 | { |
| 284 | PyObject *codecs; |
| 285 | PyObject *v; |
| 286 | |
| 287 | codecs = _PyCodec_Lookup(encoding); |
| 288 | if (codecs == NULL) |
| 289 | goto onError; |
| 290 | v = PyTuple_GET_ITEM(codecs,1); |
Mark Hammond | e21262c | 2002-07-18 23:06:17 +0000 | [diff] [blame] | 291 | Py_DECREF(codecs); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 292 | Py_INCREF(v); |
| 293 | return v; |
| 294 | |
| 295 | onError: |
| 296 | return NULL; |
| 297 | } |
| 298 | |
| 299 | PyObject *PyCodec_StreamReader(const char *encoding, |
| 300 | PyObject *stream, |
| 301 | const char *errors) |
| 302 | { |
Mark Hammond | e21262c | 2002-07-18 23:06:17 +0000 | [diff] [blame] | 303 | PyObject *codecs, *ret; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 304 | |
| 305 | codecs = _PyCodec_Lookup(encoding); |
| 306 | if (codecs == NULL) |
| 307 | goto onError; |
Mark Hammond | e21262c | 2002-07-18 23:06:17 +0000 | [diff] [blame] | 308 | ret = build_stream_codec(PyTuple_GET_ITEM(codecs,2),stream,errors); |
| 309 | Py_DECREF(codecs); |
| 310 | return ret; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 311 | |
| 312 | onError: |
| 313 | return NULL; |
| 314 | } |
| 315 | |
| 316 | PyObject *PyCodec_StreamWriter(const char *encoding, |
| 317 | PyObject *stream, |
| 318 | const char *errors) |
| 319 | { |
Mark Hammond | e21262c | 2002-07-18 23:06:17 +0000 | [diff] [blame] | 320 | PyObject *codecs, *ret; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 321 | |
| 322 | codecs = _PyCodec_Lookup(encoding); |
| 323 | if (codecs == NULL) |
| 324 | goto onError; |
Mark Hammond | e21262c | 2002-07-18 23:06:17 +0000 | [diff] [blame] | 325 | ret = build_stream_codec(PyTuple_GET_ITEM(codecs,3),stream,errors); |
| 326 | Py_DECREF(codecs); |
| 327 | return ret; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 328 | |
| 329 | onError: |
| 330 | return NULL; |
| 331 | } |
| 332 | |
| 333 | /* Encode an object (e.g. an Unicode object) using the given encoding |
| 334 | and return the resulting encoded object (usually a Python string). |
| 335 | |
| 336 | errors is passed to the encoder factory as argument if non-NULL. */ |
| 337 | |
| 338 | PyObject *PyCodec_Encode(PyObject *object, |
| 339 | const char *encoding, |
| 340 | const char *errors) |
| 341 | { |
| 342 | PyObject *encoder = NULL; |
| 343 | PyObject *args = NULL, *result; |
| 344 | PyObject *v; |
| 345 | |
| 346 | encoder = PyCodec_Encoder(encoding); |
| 347 | if (encoder == NULL) |
| 348 | goto onError; |
| 349 | |
| 350 | args = args_tuple(object, errors); |
| 351 | if (args == NULL) |
| 352 | goto onError; |
| 353 | |
| 354 | result = PyEval_CallObject(encoder,args); |
| 355 | if (result == NULL) |
| 356 | goto onError; |
| 357 | |
| 358 | if (!PyTuple_Check(result) || |
| 359 | PyTuple_GET_SIZE(result) != 2) { |
| 360 | PyErr_SetString(PyExc_TypeError, |
| 361 | "encoder must return a tuple (object,integer)"); |
| 362 | goto onError; |
| 363 | } |
| 364 | v = PyTuple_GET_ITEM(result,0); |
| 365 | Py_INCREF(v); |
| 366 | /* We don't check or use the second (integer) entry. */ |
| 367 | |
| 368 | Py_DECREF(args); |
| 369 | Py_DECREF(encoder); |
| 370 | Py_DECREF(result); |
| 371 | return v; |
| 372 | |
| 373 | onError: |
| 374 | Py_XDECREF(args); |
| 375 | Py_XDECREF(encoder); |
| 376 | return NULL; |
| 377 | } |
| 378 | |
| 379 | /* Decode an object (usually a Python string) using the given encoding |
| 380 | and return an equivalent object (e.g. an Unicode object). |
| 381 | |
| 382 | errors is passed to the decoder factory as argument if non-NULL. */ |
| 383 | |
| 384 | PyObject *PyCodec_Decode(PyObject *object, |
| 385 | const char *encoding, |
| 386 | const char *errors) |
| 387 | { |
| 388 | PyObject *decoder = NULL; |
| 389 | PyObject *args = NULL, *result = NULL; |
| 390 | PyObject *v; |
| 391 | |
| 392 | decoder = PyCodec_Decoder(encoding); |
| 393 | if (decoder == NULL) |
| 394 | goto onError; |
| 395 | |
| 396 | args = args_tuple(object, errors); |
| 397 | if (args == NULL) |
| 398 | goto onError; |
| 399 | |
| 400 | result = PyEval_CallObject(decoder,args); |
| 401 | if (result == NULL) |
| 402 | goto onError; |
| 403 | if (!PyTuple_Check(result) || |
| 404 | PyTuple_GET_SIZE(result) != 2) { |
| 405 | PyErr_SetString(PyExc_TypeError, |
| 406 | "decoder must return a tuple (object,integer)"); |
| 407 | goto onError; |
| 408 | } |
| 409 | v = PyTuple_GET_ITEM(result,0); |
| 410 | Py_INCREF(v); |
| 411 | /* We don't check or use the second (integer) entry. */ |
| 412 | |
| 413 | Py_DECREF(args); |
| 414 | Py_DECREF(decoder); |
| 415 | Py_DECREF(result); |
| 416 | return v; |
| 417 | |
| 418 | onError: |
| 419 | Py_XDECREF(args); |
| 420 | Py_XDECREF(decoder); |
| 421 | Py_XDECREF(result); |
| 422 | return NULL; |
| 423 | } |
| 424 | |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 425 | static PyObject *_PyCodec_ErrorRegistry; |
| 426 | |
| 427 | /* Register the error handling callback function error under the name |
| 428 | name. This function will be called by the codec when it encounters |
| 429 | an unencodable characters/undecodable bytes and doesn't know the |
| 430 | callback name, when name is specified as the error parameter |
| 431 | in the call to the encode/decode function. |
| 432 | Return 0 on success, -1 on error */ |
| 433 | int PyCodec_RegisterError(const char *name, PyObject *error) |
| 434 | { |
| 435 | if (!PyCallable_Check(error)) { |
| 436 | PyErr_SetString(PyExc_TypeError, "handler must be callable"); |
| 437 | return -1; |
| 438 | } |
| 439 | return PyDict_SetItemString( _PyCodec_ErrorRegistry, (char *)name, error); |
| 440 | } |
| 441 | |
| 442 | /* Lookup the error handling callback function registered under the |
| 443 | name error. As a special case NULL can be passed, in which case |
| 444 | the error handling callback for strict encoding will be returned. */ |
| 445 | PyObject *PyCodec_LookupError(const char *name) |
| 446 | { |
| 447 | PyObject *handler = NULL; |
| 448 | |
| 449 | if (name==NULL) |
| 450 | name = "strict"; |
| 451 | handler = PyDict_GetItemString(_PyCodec_ErrorRegistry, (char *)name); |
| 452 | if (!handler) |
| 453 | PyErr_Format(PyExc_LookupError, "unknown error handler name '%.400s'", name); |
| 454 | else |
| 455 | Py_INCREF(handler); |
| 456 | return handler; |
| 457 | } |
| 458 | |
| 459 | static void wrong_exception_type(PyObject *exc) |
| 460 | { |
| 461 | PyObject *type = PyObject_GetAttrString(exc, "__class__"); |
| 462 | if (type != NULL) { |
| 463 | PyObject *name = PyObject_GetAttrString(type, "__name__"); |
| 464 | Py_DECREF(type); |
| 465 | if (name != NULL) { |
| 466 | PyObject *string = PyObject_Str(name); |
| 467 | Py_DECREF(name); |
Walter Dörwald | f7bcd1d | 2002-09-02 18:22:32 +0000 | [diff] [blame] | 468 | if (string != NULL) { |
| 469 | PyErr_Format(PyExc_TypeError, |
| 470 | "don't know how to handle %.400s in error callback", |
| 471 | PyString_AS_STRING(string)); |
| 472 | Py_DECREF(string); |
| 473 | } |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 474 | } |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | PyObject *PyCodec_StrictErrors(PyObject *exc) |
| 479 | { |
| 480 | if (PyInstance_Check(exc)) |
| 481 | PyErr_SetObject((PyObject*)((PyInstanceObject*)exc)->in_class, |
| 482 | exc); |
| 483 | else |
| 484 | PyErr_SetString(PyExc_TypeError, "codec must pass exception instance"); |
| 485 | return NULL; |
| 486 | } |
| 487 | |
| 488 | |
Walter Dörwald | bf73db8 | 2002-11-21 20:08:33 +0000 | [diff] [blame] | 489 | #ifdef Py_USING_UNICODE |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 490 | PyObject *PyCodec_IgnoreErrors(PyObject *exc) |
| 491 | { |
| 492 | int end; |
| 493 | if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) { |
| 494 | if (PyUnicodeEncodeError_GetEnd(exc, &end)) |
| 495 | return NULL; |
| 496 | } |
| 497 | else if (PyObject_IsInstance(exc, PyExc_UnicodeDecodeError)) { |
| 498 | if (PyUnicodeDecodeError_GetEnd(exc, &end)) |
| 499 | return NULL; |
| 500 | } |
| 501 | else if (PyObject_IsInstance(exc, PyExc_UnicodeTranslateError)) { |
| 502 | if (PyUnicodeTranslateError_GetEnd(exc, &end)) |
| 503 | return NULL; |
| 504 | } |
| 505 | else { |
| 506 | wrong_exception_type(exc); |
| 507 | return NULL; |
| 508 | } |
| 509 | /* ouch: passing NULL, 0, pos gives None instead of u'' */ |
| 510 | return Py_BuildValue("(u#i)", &end, 0, end); |
| 511 | } |
| 512 | |
| 513 | |
| 514 | PyObject *PyCodec_ReplaceErrors(PyObject *exc) |
| 515 | { |
| 516 | PyObject *restuple; |
| 517 | int start; |
| 518 | int end; |
| 519 | int i; |
| 520 | |
| 521 | if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) { |
| 522 | PyObject *res; |
| 523 | Py_UNICODE *p; |
| 524 | if (PyUnicodeEncodeError_GetStart(exc, &start)) |
| 525 | return NULL; |
| 526 | if (PyUnicodeEncodeError_GetEnd(exc, &end)) |
| 527 | return NULL; |
| 528 | res = PyUnicode_FromUnicode(NULL, end-start); |
| 529 | if (res == NULL) |
| 530 | return NULL; |
| 531 | for (p = PyUnicode_AS_UNICODE(res), i = start; |
| 532 | i<end; ++p, ++i) |
| 533 | *p = '?'; |
| 534 | restuple = Py_BuildValue("(Oi)", res, end); |
| 535 | Py_DECREF(res); |
| 536 | return restuple; |
| 537 | } |
| 538 | else if (PyObject_IsInstance(exc, PyExc_UnicodeDecodeError)) { |
| 539 | Py_UNICODE res = Py_UNICODE_REPLACEMENT_CHARACTER; |
| 540 | if (PyUnicodeDecodeError_GetEnd(exc, &end)) |
| 541 | return NULL; |
| 542 | return Py_BuildValue("(u#i)", &res, 1, end); |
| 543 | } |
| 544 | else if (PyObject_IsInstance(exc, PyExc_UnicodeTranslateError)) { |
| 545 | PyObject *res; |
| 546 | Py_UNICODE *p; |
| 547 | if (PyUnicodeTranslateError_GetStart(exc, &start)) |
| 548 | return NULL; |
| 549 | if (PyUnicodeTranslateError_GetEnd(exc, &end)) |
| 550 | return NULL; |
| 551 | res = PyUnicode_FromUnicode(NULL, end-start); |
| 552 | if (res == NULL) |
| 553 | return NULL; |
| 554 | for (p = PyUnicode_AS_UNICODE(res), i = start; |
| 555 | i<end; ++p, ++i) |
| 556 | *p = Py_UNICODE_REPLACEMENT_CHARACTER; |
| 557 | restuple = Py_BuildValue("(Oi)", res, end); |
| 558 | Py_DECREF(res); |
| 559 | return restuple; |
| 560 | } |
| 561 | else { |
| 562 | wrong_exception_type(exc); |
| 563 | return NULL; |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | PyObject *PyCodec_XMLCharRefReplaceErrors(PyObject *exc) |
| 568 | { |
| 569 | if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) { |
| 570 | PyObject *restuple; |
| 571 | PyObject *object; |
| 572 | int start; |
| 573 | int end; |
| 574 | PyObject *res; |
| 575 | Py_UNICODE *p; |
| 576 | Py_UNICODE *startp; |
| 577 | Py_UNICODE *outp; |
| 578 | int ressize; |
| 579 | if (PyUnicodeEncodeError_GetStart(exc, &start)) |
| 580 | return NULL; |
| 581 | if (PyUnicodeEncodeError_GetEnd(exc, &end)) |
| 582 | return NULL; |
| 583 | if (!(object = PyUnicodeEncodeError_GetObject(exc))) |
| 584 | return NULL; |
| 585 | startp = PyUnicode_AS_UNICODE(object); |
| 586 | for (p = startp+start, ressize = 0; p < startp+end; ++p) { |
| 587 | if (*p<10) |
| 588 | ressize += 2+1+1; |
| 589 | else if (*p<100) |
| 590 | ressize += 2+2+1; |
| 591 | else if (*p<1000) |
| 592 | ressize += 2+3+1; |
| 593 | else if (*p<10000) |
| 594 | ressize += 2+4+1; |
| 595 | else if (*p<100000) |
| 596 | ressize += 2+5+1; |
| 597 | else if (*p<1000000) |
| 598 | ressize += 2+6+1; |
| 599 | else |
| 600 | ressize += 2+7+1; |
| 601 | } |
| 602 | /* allocate replacement */ |
| 603 | res = PyUnicode_FromUnicode(NULL, ressize); |
| 604 | if (res == NULL) { |
| 605 | Py_DECREF(object); |
| 606 | return NULL; |
| 607 | } |
| 608 | /* generate replacement */ |
| 609 | for (p = startp+start, outp = PyUnicode_AS_UNICODE(res); |
| 610 | p < startp+end; ++p) { |
| 611 | Py_UNICODE c = *p; |
| 612 | int digits; |
| 613 | int base; |
| 614 | *outp++ = '&'; |
| 615 | *outp++ = '#'; |
| 616 | if (*p<10) { |
| 617 | digits = 1; |
| 618 | base = 1; |
| 619 | } |
| 620 | else if (*p<100) { |
| 621 | digits = 2; |
| 622 | base = 10; |
| 623 | } |
| 624 | else if (*p<1000) { |
| 625 | digits = 3; |
| 626 | base = 100; |
| 627 | } |
| 628 | else if (*p<10000) { |
| 629 | digits = 4; |
| 630 | base = 1000; |
| 631 | } |
| 632 | else if (*p<100000) { |
| 633 | digits = 5; |
| 634 | base = 10000; |
| 635 | } |
| 636 | else if (*p<1000000) { |
| 637 | digits = 6; |
| 638 | base = 100000; |
| 639 | } |
| 640 | else { |
| 641 | digits = 7; |
| 642 | base = 1000000; |
| 643 | } |
| 644 | while (digits-->0) { |
| 645 | *outp++ = '0' + c/base; |
| 646 | c %= base; |
| 647 | base /= 10; |
| 648 | } |
| 649 | *outp++ = ';'; |
| 650 | } |
| 651 | restuple = Py_BuildValue("(Oi)", res, end); |
| 652 | Py_DECREF(res); |
| 653 | Py_DECREF(object); |
| 654 | return restuple; |
| 655 | } |
| 656 | else { |
| 657 | wrong_exception_type(exc); |
| 658 | return NULL; |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | static Py_UNICODE hexdigits[] = { |
| 663 | '0', '1', '2', '3', '4', '5', '6', '7', |
| 664 | '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' |
| 665 | }; |
| 666 | |
| 667 | PyObject *PyCodec_BackslashReplaceErrors(PyObject *exc) |
| 668 | { |
| 669 | if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) { |
| 670 | PyObject *restuple; |
| 671 | PyObject *object; |
| 672 | int start; |
| 673 | int end; |
| 674 | PyObject *res; |
| 675 | Py_UNICODE *p; |
| 676 | Py_UNICODE *startp; |
| 677 | Py_UNICODE *outp; |
| 678 | int ressize; |
| 679 | if (PyUnicodeEncodeError_GetStart(exc, &start)) |
| 680 | return NULL; |
| 681 | if (PyUnicodeEncodeError_GetEnd(exc, &end)) |
| 682 | return NULL; |
| 683 | if (!(object = PyUnicodeEncodeError_GetObject(exc))) |
| 684 | return NULL; |
| 685 | startp = PyUnicode_AS_UNICODE(object); |
| 686 | for (p = startp+start, ressize = 0; p < startp+end; ++p) { |
| 687 | if (*p >= 0x00010000) |
| 688 | ressize += 1+1+8; |
| 689 | else if (*p >= 0x100) { |
| 690 | ressize += 1+1+4; |
| 691 | } |
| 692 | else |
| 693 | ressize += 1+1+2; |
| 694 | } |
| 695 | res = PyUnicode_FromUnicode(NULL, ressize); |
| 696 | if (res==NULL) |
| 697 | return NULL; |
| 698 | for (p = startp+start, outp = PyUnicode_AS_UNICODE(res); |
| 699 | p < startp+end; ++p) { |
| 700 | Py_UNICODE c = *p; |
| 701 | *outp++ = '\\'; |
| 702 | if (c >= 0x00010000) { |
| 703 | *outp++ = 'U'; |
| 704 | *outp++ = hexdigits[(c>>28)&0xf]; |
| 705 | *outp++ = hexdigits[(c>>24)&0xf]; |
| 706 | *outp++ = hexdigits[(c>>20)&0xf]; |
| 707 | *outp++ = hexdigits[(c>>16)&0xf]; |
| 708 | *outp++ = hexdigits[(c>>12)&0xf]; |
| 709 | *outp++ = hexdigits[(c>>8)&0xf]; |
| 710 | } |
| 711 | else if (c >= 0x100) { |
| 712 | *outp++ = 'u'; |
| 713 | *outp++ = hexdigits[(c>>12)&0xf]; |
| 714 | *outp++ = hexdigits[(c>>8)&0xf]; |
| 715 | } |
| 716 | else |
| 717 | *outp++ = 'x'; |
| 718 | *outp++ = hexdigits[(c>>4)&0xf]; |
| 719 | *outp++ = hexdigits[c&0xf]; |
| 720 | } |
| 721 | |
| 722 | restuple = Py_BuildValue("(Oi)", res, end); |
| 723 | Py_DECREF(res); |
| 724 | Py_DECREF(object); |
| 725 | return restuple; |
| 726 | } |
| 727 | else { |
| 728 | wrong_exception_type(exc); |
| 729 | return NULL; |
| 730 | } |
| 731 | } |
Walter Dörwald | bf73db8 | 2002-11-21 20:08:33 +0000 | [diff] [blame] | 732 | #endif |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 733 | |
| 734 | static PyObject *strict_errors(PyObject *self, PyObject *exc) |
| 735 | { |
| 736 | return PyCodec_StrictErrors(exc); |
| 737 | } |
| 738 | |
| 739 | |
Walter Dörwald | bf73db8 | 2002-11-21 20:08:33 +0000 | [diff] [blame] | 740 | #ifdef Py_USING_UNICODE |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 741 | static PyObject *ignore_errors(PyObject *self, PyObject *exc) |
| 742 | { |
| 743 | return PyCodec_IgnoreErrors(exc); |
| 744 | } |
| 745 | |
| 746 | |
| 747 | static PyObject *replace_errors(PyObject *self, PyObject *exc) |
| 748 | { |
| 749 | return PyCodec_ReplaceErrors(exc); |
| 750 | } |
| 751 | |
| 752 | |
| 753 | static PyObject *xmlcharrefreplace_errors(PyObject *self, PyObject *exc) |
| 754 | { |
| 755 | return PyCodec_XMLCharRefReplaceErrors(exc); |
| 756 | } |
| 757 | |
| 758 | |
| 759 | static PyObject *backslashreplace_errors(PyObject *self, PyObject *exc) |
| 760 | { |
| 761 | return PyCodec_BackslashReplaceErrors(exc); |
| 762 | } |
Walter Dörwald | bf73db8 | 2002-11-21 20:08:33 +0000 | [diff] [blame] | 763 | #endif |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 764 | |
| 765 | |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 766 | void _PyCodecRegistry_Init(void) |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 767 | { |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 768 | static struct { |
| 769 | char *name; |
| 770 | PyMethodDef def; |
| 771 | } methods[] = |
| 772 | { |
| 773 | { |
| 774 | "strict", |
| 775 | { |
| 776 | "strict_errors", |
| 777 | strict_errors, |
| 778 | METH_O |
| 779 | } |
| 780 | }, |
Walter Dörwald | bf73db8 | 2002-11-21 20:08:33 +0000 | [diff] [blame] | 781 | #ifdef Py_USING_UNICODE |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 782 | { |
| 783 | "ignore", |
| 784 | { |
| 785 | "ignore_errors", |
| 786 | ignore_errors, |
| 787 | METH_O |
| 788 | } |
| 789 | }, |
| 790 | { |
| 791 | "replace", |
| 792 | { |
| 793 | "replace_errors", |
| 794 | replace_errors, |
| 795 | METH_O |
| 796 | } |
| 797 | }, |
| 798 | { |
| 799 | "xmlcharrefreplace", |
| 800 | { |
| 801 | "xmlcharrefreplace_errors", |
| 802 | xmlcharrefreplace_errors, |
| 803 | METH_O |
| 804 | } |
| 805 | }, |
| 806 | { |
| 807 | "backslashreplace", |
| 808 | { |
| 809 | "backslashreplace_errors", |
| 810 | backslashreplace_errors, |
| 811 | METH_O |
| 812 | } |
| 813 | } |
Walter Dörwald | bf73db8 | 2002-11-21 20:08:33 +0000 | [diff] [blame] | 814 | #endif |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 815 | }; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 816 | if (_PyCodec_SearchPath == NULL) |
| 817 | _PyCodec_SearchPath = PyList_New(0); |
| 818 | if (_PyCodec_SearchCache == NULL) |
| 819 | _PyCodec_SearchCache = PyDict_New(); |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 820 | if (_PyCodec_ErrorRegistry == NULL) { |
| 821 | int i; |
| 822 | _PyCodec_ErrorRegistry = PyDict_New(); |
| 823 | |
| 824 | if (_PyCodec_ErrorRegistry) { |
Martin v. Löwis | ba2cf07 | 2002-11-21 23:53:25 +0000 | [diff] [blame] | 825 | for (i = 0; i < sizeof(methods)/sizeof(methods[0]); ++i) { |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 826 | PyObject *func = PyCFunction_New(&methods[i].def, NULL); |
| 827 | int res; |
| 828 | if (!func) |
| 829 | Py_FatalError("can't initialize codec error registry"); |
| 830 | res = PyCodec_RegisterError(methods[i].name, func); |
| 831 | Py_DECREF(func); |
| 832 | if (res) |
| 833 | Py_FatalError("can't initialize codec error registry"); |
| 834 | } |
| 835 | } |
| 836 | } |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 837 | if (_PyCodec_SearchPath == NULL || |
| 838 | _PyCodec_SearchCache == NULL) |
Thomas Wouters | 7e47402 | 2000-07-16 12:04:32 +0000 | [diff] [blame] | 839 | Py_FatalError("can't initialize codec registry"); |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 840 | } |
| 841 | |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 842 | void _PyCodecRegistry_Fini(void) |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 843 | { |
| 844 | Py_XDECREF(_PyCodec_SearchPath); |
Barry Warsaw | 51ac580 | 2000-03-20 16:36:48 +0000 | [diff] [blame] | 845 | _PyCodec_SearchPath = NULL; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 846 | Py_XDECREF(_PyCodec_SearchCache); |
Barry Warsaw | 51ac580 | 2000-03-20 16:36:48 +0000 | [diff] [blame] | 847 | _PyCodec_SearchCache = NULL; |
Walter Dörwald | 3aeb632 | 2002-09-02 13:14:32 +0000 | [diff] [blame] | 848 | Py_XDECREF(_PyCodec_ErrorRegistry); |
| 849 | _PyCodec_ErrorRegistry = NULL; |
Guido van Rossum | feee4b9 | 2000-03-10 22:57:27 +0000 | [diff] [blame] | 850 | } |