Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | An implementation of Buffered I/O as defined by PEP 3116 - "New I/O" |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 3 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 4 | Classes defined here: BufferedIOBase, BufferedReader, BufferedWriter, |
| 5 | BufferedRandom. |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 6 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 7 | Written by Amaury Forgeot d'Arc and Antoine Pitrou |
| 8 | */ |
| 9 | |
| 10 | #define PY_SSIZE_T_CLEAN |
| 11 | #include "Python.h" |
| 12 | #include "structmember.h" |
| 13 | #include "pythread.h" |
| 14 | #include "_iomodule.h" |
| 15 | |
Martin v. Löwis | bd928fe | 2011-10-14 10:20:37 +0200 | [diff] [blame] | 16 | _Py_IDENTIFIER(close); |
| 17 | _Py_IDENTIFIER(_dealloc_warn); |
| 18 | _Py_IDENTIFIER(flush); |
| 19 | _Py_IDENTIFIER(isatty); |
Martin v. Löwis | 767046a | 2011-10-14 15:35:36 +0200 | [diff] [blame] | 20 | _Py_IDENTIFIER(mode); |
| 21 | _Py_IDENTIFIER(name); |
Martin v. Löwis | bd928fe | 2011-10-14 10:20:37 +0200 | [diff] [blame] | 22 | _Py_IDENTIFIER(peek); |
| 23 | _Py_IDENTIFIER(read); |
| 24 | _Py_IDENTIFIER(read1); |
| 25 | _Py_IDENTIFIER(readable); |
| 26 | _Py_IDENTIFIER(readinto); |
| 27 | _Py_IDENTIFIER(writable); |
| 28 | _Py_IDENTIFIER(write); |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 29 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 30 | /* |
| 31 | * BufferedIOBase class, inherits from IOBase. |
| 32 | */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 33 | PyDoc_STRVAR(bufferediobase_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 34 | "Base class for buffered IO objects.\n" |
| 35 | "\n" |
| 36 | "The main difference with RawIOBase is that the read() method\n" |
| 37 | "supports omitting the size argument, and does not have a default\n" |
| 38 | "implementation that defers to readinto().\n" |
| 39 | "\n" |
| 40 | "In addition, read(), readinto() and write() may raise\n" |
| 41 | "BlockingIOError if the underlying raw stream is in non-blocking\n" |
| 42 | "mode and not ready; unlike their raw counterparts, they will never\n" |
| 43 | "return None.\n" |
| 44 | "\n" |
| 45 | "A typical implementation should not inherit from a RawIOBase\n" |
| 46 | "implementation, but wrap one.\n" |
| 47 | ); |
| 48 | |
| 49 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 50 | bufferediobase_readinto(PyObject *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 51 | { |
| 52 | Py_buffer buf; |
| 53 | Py_ssize_t len; |
| 54 | PyObject *data; |
Martin v. Löwis | bd928fe | 2011-10-14 10:20:37 +0200 | [diff] [blame] | 55 | _Py_IDENTIFIER(read); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 56 | |
| 57 | if (!PyArg_ParseTuple(args, "w*:readinto", &buf)) { |
| 58 | return NULL; |
| 59 | } |
| 60 | |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 61 | data = _PyObject_CallMethodId(self, &PyId_read, "n", buf.len); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 62 | if (data == NULL) |
| 63 | goto error; |
| 64 | |
| 65 | if (!PyBytes_Check(data)) { |
| 66 | Py_DECREF(data); |
| 67 | PyErr_SetString(PyExc_TypeError, "read() should return bytes"); |
| 68 | goto error; |
| 69 | } |
| 70 | |
| 71 | len = Py_SIZE(data); |
| 72 | memcpy(buf.buf, PyBytes_AS_STRING(data), len); |
| 73 | |
| 74 | PyBuffer_Release(&buf); |
| 75 | Py_DECREF(data); |
| 76 | |
| 77 | return PyLong_FromSsize_t(len); |
| 78 | |
| 79 | error: |
| 80 | PyBuffer_Release(&buf); |
| 81 | return NULL; |
| 82 | } |
| 83 | |
| 84 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 85 | bufferediobase_unsupported(const char *message) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 86 | { |
| 87 | PyErr_SetString(IO_STATE->unsupported_operation, message); |
| 88 | return NULL; |
| 89 | } |
| 90 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 91 | PyDoc_STRVAR(bufferediobase_detach_doc, |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 92 | "Disconnect this buffer from its underlying raw stream and return it.\n" |
| 93 | "\n" |
| 94 | "After the raw stream has been detached, the buffer is in an unusable\n" |
| 95 | "state.\n"); |
| 96 | |
| 97 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 98 | bufferediobase_detach(PyObject *self) |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 99 | { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 100 | return bufferediobase_unsupported("detach"); |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 101 | } |
| 102 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 103 | PyDoc_STRVAR(bufferediobase_read_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 104 | "Read and return up to n bytes.\n" |
| 105 | "\n" |
| 106 | "If the argument is omitted, None, or negative, reads and\n" |
| 107 | "returns all data until EOF.\n" |
| 108 | "\n" |
| 109 | "If the argument is positive, and the underlying raw stream is\n" |
| 110 | "not 'interactive', multiple raw reads may be issued to satisfy\n" |
| 111 | "the byte count (unless EOF is reached first). But for\n" |
| 112 | "interactive raw streams (as well as sockets and pipes), at most\n" |
| 113 | "one raw read will be issued, and a short result does not imply\n" |
| 114 | "that EOF is imminent.\n" |
| 115 | "\n" |
| 116 | "Returns an empty bytes object on EOF.\n" |
| 117 | "\n" |
| 118 | "Returns None if the underlying raw stream was open in non-blocking\n" |
| 119 | "mode and no data is available at the moment.\n"); |
| 120 | |
| 121 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 122 | bufferediobase_read(PyObject *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 123 | { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 124 | return bufferediobase_unsupported("read"); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 125 | } |
| 126 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 127 | PyDoc_STRVAR(bufferediobase_read1_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 128 | "Read and return up to n bytes, with at most one read() call\n" |
| 129 | "to the underlying raw stream. A short result does not imply\n" |
| 130 | "that EOF is imminent.\n" |
| 131 | "\n" |
| 132 | "Returns an empty bytes object on EOF.\n"); |
| 133 | |
| 134 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 135 | bufferediobase_read1(PyObject *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 136 | { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 137 | return bufferediobase_unsupported("read1"); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 138 | } |
| 139 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 140 | PyDoc_STRVAR(bufferediobase_write_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 141 | "Write the given buffer to the IO stream.\n" |
| 142 | "\n" |
| 143 | "Returns the number of bytes written, which is never less than\n" |
| 144 | "len(b).\n" |
| 145 | "\n" |
| 146 | "Raises BlockingIOError if the buffer is full and the\n" |
| 147 | "underlying raw stream cannot accept more data at the moment.\n"); |
| 148 | |
| 149 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 150 | bufferediobase_write(PyObject *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 151 | { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 152 | return bufferediobase_unsupported("write"); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 156 | static PyMethodDef bufferediobase_methods[] = { |
| 157 | {"detach", (PyCFunction)bufferediobase_detach, METH_NOARGS, bufferediobase_detach_doc}, |
| 158 | {"read", bufferediobase_read, METH_VARARGS, bufferediobase_read_doc}, |
| 159 | {"read1", bufferediobase_read1, METH_VARARGS, bufferediobase_read1_doc}, |
| 160 | {"readinto", bufferediobase_readinto, METH_VARARGS, NULL}, |
| 161 | {"write", bufferediobase_write, METH_VARARGS, bufferediobase_write_doc}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 162 | {NULL, NULL} |
| 163 | }; |
| 164 | |
| 165 | PyTypeObject PyBufferedIOBase_Type = { |
| 166 | PyVarObject_HEAD_INIT(NULL, 0) |
| 167 | "_io._BufferedIOBase", /*tp_name*/ |
| 168 | 0, /*tp_basicsize*/ |
| 169 | 0, /*tp_itemsize*/ |
| 170 | 0, /*tp_dealloc*/ |
| 171 | 0, /*tp_print*/ |
| 172 | 0, /*tp_getattr*/ |
| 173 | 0, /*tp_setattr*/ |
| 174 | 0, /*tp_compare */ |
| 175 | 0, /*tp_repr*/ |
| 176 | 0, /*tp_as_number*/ |
| 177 | 0, /*tp_as_sequence*/ |
| 178 | 0, /*tp_as_mapping*/ |
| 179 | 0, /*tp_hash */ |
| 180 | 0, /*tp_call*/ |
| 181 | 0, /*tp_str*/ |
| 182 | 0, /*tp_getattro*/ |
| 183 | 0, /*tp_setattro*/ |
| 184 | 0, /*tp_as_buffer*/ |
| 185 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 186 | bufferediobase_doc, /* tp_doc */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 187 | 0, /* tp_traverse */ |
| 188 | 0, /* tp_clear */ |
| 189 | 0, /* tp_richcompare */ |
| 190 | 0, /* tp_weaklistoffset */ |
| 191 | 0, /* tp_iter */ |
| 192 | 0, /* tp_iternext */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 193 | bufferediobase_methods, /* tp_methods */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 194 | 0, /* tp_members */ |
| 195 | 0, /* tp_getset */ |
| 196 | &PyIOBase_Type, /* tp_base */ |
| 197 | 0, /* tp_dict */ |
| 198 | 0, /* tp_descr_get */ |
| 199 | 0, /* tp_descr_set */ |
| 200 | 0, /* tp_dictoffset */ |
| 201 | 0, /* tp_init */ |
| 202 | 0, /* tp_alloc */ |
| 203 | 0, /* tp_new */ |
| 204 | }; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 205 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 206 | |
| 207 | typedef struct { |
| 208 | PyObject_HEAD |
| 209 | |
| 210 | PyObject *raw; |
| 211 | int ok; /* Initialized? */ |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 212 | int detached; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 213 | int readable; |
| 214 | int writable; |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 215 | int deallocating; |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 216 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 217 | /* True if this is a vanilla Buffered object (rather than a user derived |
| 218 | class) *and* the raw stream is a vanilla FileIO object. */ |
| 219 | int fast_closed_checks; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 220 | |
| 221 | /* Absolute position inside the raw stream (-1 if unknown). */ |
| 222 | Py_off_t abs_pos; |
| 223 | |
| 224 | /* A static buffer of size `buffer_size` */ |
| 225 | char *buffer; |
| 226 | /* Current logical position in the buffer. */ |
| 227 | Py_off_t pos; |
| 228 | /* Position of the raw stream in the buffer. */ |
| 229 | Py_off_t raw_pos; |
| 230 | |
| 231 | /* Just after the last buffered byte in the buffer, or -1 if the buffer |
| 232 | isn't ready for reading. */ |
| 233 | Py_off_t read_end; |
| 234 | |
| 235 | /* Just after the last byte actually written */ |
| 236 | Py_off_t write_pos; |
| 237 | /* Just after the last byte waiting to be written, or -1 if the buffer |
| 238 | isn't ready for writing. */ |
| 239 | Py_off_t write_end; |
| 240 | |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 241 | #ifdef WITH_THREAD |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 242 | PyThread_type_lock lock; |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 243 | volatile long owner; |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 244 | #endif |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 245 | |
| 246 | Py_ssize_t buffer_size; |
| 247 | Py_ssize_t buffer_mask; |
| 248 | |
| 249 | PyObject *dict; |
| 250 | PyObject *weakreflist; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 251 | } buffered; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 252 | |
| 253 | /* |
| 254 | Implementation notes: |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 255 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 256 | * BufferedReader, BufferedWriter and BufferedRandom try to share most |
| 257 | methods (this is helped by the members `readable` and `writable`, which |
| 258 | are initialized in the respective constructors) |
| 259 | * They also share a single buffer for reading and writing. This enables |
| 260 | interleaved reads and writes without flushing. It also makes the logic |
| 261 | a bit trickier to get right. |
| 262 | * The absolute position of the raw stream is cached, if possible, in the |
| 263 | `abs_pos` member. It must be updated every time an operation is done |
| 264 | on the raw stream. If not sure, it can be reinitialized by calling |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 265 | _buffered_raw_tell(), which queries the raw stream (_buffered_raw_seek() |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 266 | also does it). To read it, use RAW_TELL(). |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 267 | * Three helpers, _bufferedreader_raw_read, _bufferedwriter_raw_write and |
| 268 | _bufferedwriter_flush_unlocked do a lot of useful housekeeping. |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 269 | |
| 270 | NOTE: we should try to maintain block alignment of reads and writes to the |
| 271 | raw stream (according to the buffer size), but for now it is only done |
| 272 | in read() and friends. |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 273 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 274 | */ |
| 275 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 276 | /* These macros protect the buffered object against concurrent operations. */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 277 | |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 278 | #ifdef WITH_THREAD |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 279 | |
| 280 | static int |
| 281 | _enter_buffered_busy(buffered *self) |
| 282 | { |
| 283 | if (self->owner == PyThread_get_thread_ident()) { |
| 284 | PyErr_Format(PyExc_RuntimeError, |
| 285 | "reentrant call inside %R", self); |
| 286 | return 0; |
Antoine Pitrou | 5800b27 | 2009-11-01 12:05:48 +0000 | [diff] [blame] | 287 | } |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 288 | Py_BEGIN_ALLOW_THREADS |
| 289 | PyThread_acquire_lock(self->lock, 1); |
| 290 | Py_END_ALLOW_THREADS |
| 291 | return 1; |
| 292 | } |
| 293 | |
| 294 | #define ENTER_BUFFERED(self) \ |
| 295 | ( (PyThread_acquire_lock(self->lock, 0) ? \ |
| 296 | 1 : _enter_buffered_busy(self)) \ |
| 297 | && (self->owner = PyThread_get_thread_ident(), 1) ) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 298 | |
| 299 | #define LEAVE_BUFFERED(self) \ |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 300 | do { \ |
| 301 | self->owner = 0; \ |
| 302 | PyThread_release_lock(self->lock); \ |
| 303 | } while(0); |
| 304 | |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 305 | #else |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 306 | #define ENTER_BUFFERED(self) 1 |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 307 | #define LEAVE_BUFFERED(self) |
| 308 | #endif |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 309 | |
| 310 | #define CHECK_INITIALIZED(self) \ |
| 311 | if (self->ok <= 0) { \ |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 312 | if (self->detached) { \ |
| 313 | PyErr_SetString(PyExc_ValueError, \ |
| 314 | "raw stream has been detached"); \ |
| 315 | } else { \ |
| 316 | PyErr_SetString(PyExc_ValueError, \ |
| 317 | "I/O operation on uninitialized object"); \ |
| 318 | } \ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 319 | return NULL; \ |
| 320 | } |
| 321 | |
| 322 | #define CHECK_INITIALIZED_INT(self) \ |
| 323 | if (self->ok <= 0) { \ |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 324 | if (self->detached) { \ |
| 325 | PyErr_SetString(PyExc_ValueError, \ |
| 326 | "raw stream has been detached"); \ |
| 327 | } else { \ |
| 328 | PyErr_SetString(PyExc_ValueError, \ |
| 329 | "I/O operation on uninitialized object"); \ |
| 330 | } \ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 331 | return -1; \ |
| 332 | } |
| 333 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 334 | #define IS_CLOSED(self) \ |
| 335 | (self->fast_closed_checks \ |
| 336 | ? _PyFileIO_closed(self->raw) \ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 337 | : buffered_closed(self)) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 338 | |
| 339 | #define CHECK_CLOSED(self, error_msg) \ |
| 340 | if (IS_CLOSED(self)) { \ |
| 341 | PyErr_SetString(PyExc_ValueError, error_msg); \ |
| 342 | return NULL; \ |
| 343 | } |
| 344 | |
| 345 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 346 | #define VALID_READ_BUFFER(self) \ |
| 347 | (self->readable && self->read_end != -1) |
| 348 | |
| 349 | #define VALID_WRITE_BUFFER(self) \ |
| 350 | (self->writable && self->write_end != -1) |
| 351 | |
| 352 | #define ADJUST_POSITION(self, _new_pos) \ |
| 353 | do { \ |
| 354 | self->pos = _new_pos; \ |
| 355 | if (VALID_READ_BUFFER(self) && self->read_end < self->pos) \ |
| 356 | self->read_end = self->pos; \ |
| 357 | } while(0) |
| 358 | |
| 359 | #define READAHEAD(self) \ |
| 360 | ((self->readable && VALID_READ_BUFFER(self)) \ |
| 361 | ? (self->read_end - self->pos) : 0) |
| 362 | |
| 363 | #define RAW_OFFSET(self) \ |
| 364 | (((VALID_READ_BUFFER(self) || VALID_WRITE_BUFFER(self)) \ |
| 365 | && self->raw_pos >= 0) ? self->raw_pos - self->pos : 0) |
| 366 | |
| 367 | #define RAW_TELL(self) \ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 368 | (self->abs_pos != -1 ? self->abs_pos : _buffered_raw_tell(self)) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 369 | |
| 370 | #define MINUS_LAST_BLOCK(self, size) \ |
| 371 | (self->buffer_mask ? \ |
| 372 | (size & ~self->buffer_mask) : \ |
| 373 | (self->buffer_size * (size / self->buffer_size))) |
| 374 | |
| 375 | |
| 376 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 377 | buffered_dealloc(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 378 | { |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 379 | self->deallocating = 1; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 380 | if (self->ok && _PyIOBase_finalize((PyObject *) self) < 0) |
| 381 | return; |
| 382 | _PyObject_GC_UNTRACK(self); |
| 383 | self->ok = 0; |
| 384 | if (self->weakreflist != NULL) |
| 385 | PyObject_ClearWeakRefs((PyObject *)self); |
| 386 | Py_CLEAR(self->raw); |
| 387 | if (self->buffer) { |
| 388 | PyMem_Free(self->buffer); |
| 389 | self->buffer = NULL; |
| 390 | } |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 391 | #ifdef WITH_THREAD |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 392 | if (self->lock) { |
| 393 | PyThread_free_lock(self->lock); |
| 394 | self->lock = NULL; |
| 395 | } |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 396 | #endif |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 397 | Py_CLEAR(self->dict); |
| 398 | Py_TYPE(self)->tp_free((PyObject *)self); |
| 399 | } |
| 400 | |
| 401 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 402 | buffered_traverse(buffered *self, visitproc visit, void *arg) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 403 | { |
| 404 | Py_VISIT(self->raw); |
| 405 | Py_VISIT(self->dict); |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 410 | buffered_clear(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 411 | { |
| 412 | if (self->ok && _PyIOBase_finalize((PyObject *) self) < 0) |
| 413 | return -1; |
| 414 | self->ok = 0; |
| 415 | Py_CLEAR(self->raw); |
| 416 | Py_CLEAR(self->dict); |
| 417 | return 0; |
| 418 | } |
| 419 | |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 420 | /* Because this can call arbitrary code, it shouldn't be called when |
| 421 | the refcount is 0 (that is, not directly from tp_dealloc unless |
| 422 | the refcount has been temporarily re-incremented). */ |
Matthias Klose | bee3316 | 2010-11-16 20:07:51 +0000 | [diff] [blame] | 423 | static PyObject * |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 424 | buffered_dealloc_warn(buffered *self, PyObject *source) |
| 425 | { |
| 426 | if (self->ok && self->raw) { |
| 427 | PyObject *r; |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 428 | r = _PyObject_CallMethodId(self->raw, &PyId__dealloc_warn, "O", source); |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 429 | if (r) |
| 430 | Py_DECREF(r); |
| 431 | else |
| 432 | PyErr_Clear(); |
| 433 | } |
| 434 | Py_RETURN_NONE; |
| 435 | } |
| 436 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 437 | /* |
| 438 | * _BufferedIOMixin methods |
| 439 | * This is not a class, just a collection of methods that will be reused |
| 440 | * by BufferedReader and BufferedWriter |
| 441 | */ |
| 442 | |
| 443 | /* Flush and close */ |
| 444 | |
| 445 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 446 | buffered_simple_flush(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 447 | { |
| 448 | CHECK_INITIALIZED(self) |
| 449 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_flush, NULL); |
| 450 | } |
| 451 | |
| 452 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 453 | buffered_closed(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 454 | { |
| 455 | int closed; |
| 456 | PyObject *res; |
| 457 | CHECK_INITIALIZED_INT(self) |
| 458 | res = PyObject_GetAttr(self->raw, _PyIO_str_closed); |
| 459 | if (res == NULL) |
| 460 | return -1; |
| 461 | closed = PyObject_IsTrue(res); |
| 462 | Py_DECREF(res); |
| 463 | return closed; |
| 464 | } |
| 465 | |
| 466 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 467 | buffered_closed_get(buffered *self, void *context) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 468 | { |
| 469 | CHECK_INITIALIZED(self) |
| 470 | return PyObject_GetAttr(self->raw, _PyIO_str_closed); |
| 471 | } |
| 472 | |
| 473 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 474 | buffered_close(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 475 | { |
| 476 | PyObject *res = NULL; |
| 477 | int r; |
| 478 | |
| 479 | CHECK_INITIALIZED(self) |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 480 | if (!ENTER_BUFFERED(self)) |
| 481 | return NULL; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 482 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 483 | r = buffered_closed(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 484 | if (r < 0) |
| 485 | goto end; |
| 486 | if (r > 0) { |
| 487 | res = Py_None; |
| 488 | Py_INCREF(res); |
| 489 | goto end; |
| 490 | } |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 491 | |
| 492 | if (self->deallocating) { |
| 493 | PyObject *r = buffered_dealloc_warn(self, (PyObject *) self); |
| 494 | if (r) |
| 495 | Py_DECREF(r); |
| 496 | else |
| 497 | PyErr_Clear(); |
| 498 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 499 | /* flush() will most probably re-take the lock, so drop it first */ |
| 500 | LEAVE_BUFFERED(self) |
| 501 | res = PyObject_CallMethodObjArgs((PyObject *)self, _PyIO_str_flush, NULL); |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 502 | if (!ENTER_BUFFERED(self)) |
| 503 | return NULL; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 504 | if (res == NULL) { |
Antoine Pitrou | 6be8876 | 2010-05-03 16:48:20 +0000 | [diff] [blame] | 505 | goto end; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 506 | } |
| 507 | Py_XDECREF(res); |
| 508 | |
| 509 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_close, NULL); |
| 510 | |
| 511 | end: |
| 512 | LEAVE_BUFFERED(self) |
| 513 | return res; |
| 514 | } |
| 515 | |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 516 | /* detach */ |
| 517 | |
| 518 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 519 | buffered_detach(buffered *self, PyObject *args) |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 520 | { |
| 521 | PyObject *raw, *res; |
| 522 | CHECK_INITIALIZED(self) |
| 523 | res = PyObject_CallMethodObjArgs((PyObject *)self, _PyIO_str_flush, NULL); |
| 524 | if (res == NULL) |
| 525 | return NULL; |
| 526 | Py_DECREF(res); |
| 527 | raw = self->raw; |
| 528 | self->raw = NULL; |
| 529 | self->detached = 1; |
| 530 | self->ok = 0; |
| 531 | return raw; |
| 532 | } |
| 533 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 534 | /* Inquiries */ |
| 535 | |
| 536 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 537 | buffered_seekable(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 538 | { |
| 539 | CHECK_INITIALIZED(self) |
| 540 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_seekable, NULL); |
| 541 | } |
| 542 | |
| 543 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 544 | buffered_readable(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 545 | { |
| 546 | CHECK_INITIALIZED(self) |
| 547 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readable, NULL); |
| 548 | } |
| 549 | |
| 550 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 551 | buffered_writable(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 552 | { |
| 553 | CHECK_INITIALIZED(self) |
| 554 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_writable, NULL); |
| 555 | } |
| 556 | |
| 557 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 558 | buffered_name_get(buffered *self, void *context) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 559 | { |
| 560 | CHECK_INITIALIZED(self) |
Martin v. Löwis | 767046a | 2011-10-14 15:35:36 +0200 | [diff] [blame] | 561 | return _PyObject_GetAttrId(self->raw, &PyId_name); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 562 | } |
| 563 | |
| 564 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 565 | buffered_mode_get(buffered *self, void *context) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 566 | { |
| 567 | CHECK_INITIALIZED(self) |
Martin v. Löwis | 767046a | 2011-10-14 15:35:36 +0200 | [diff] [blame] | 568 | return _PyObject_GetAttrId(self->raw, &PyId_mode); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | /* Lower-level APIs */ |
| 572 | |
| 573 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 574 | buffered_fileno(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 575 | { |
| 576 | CHECK_INITIALIZED(self) |
| 577 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_fileno, NULL); |
| 578 | } |
| 579 | |
| 580 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 581 | buffered_isatty(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 582 | { |
| 583 | CHECK_INITIALIZED(self) |
| 584 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_isatty, NULL); |
| 585 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 586 | |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 587 | /* Serialization */ |
| 588 | |
| 589 | static PyObject * |
| 590 | buffered_getstate(buffered *self, PyObject *args) |
| 591 | { |
| 592 | PyErr_Format(PyExc_TypeError, |
| 593 | "cannot serialize '%s' object", Py_TYPE(self)->tp_name); |
| 594 | return NULL; |
| 595 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 596 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 597 | /* Forward decls */ |
| 598 | static PyObject * |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 599 | _bufferedwriter_flush_unlocked(buffered *); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 600 | static Py_ssize_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 601 | _bufferedreader_fill_buffer(buffered *self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 602 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 603 | _bufferedreader_reset_buf(buffered *self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 604 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 605 | _bufferedwriter_reset_buf(buffered *self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 606 | static PyObject * |
Victor Stinner | bc93a11 | 2011-06-01 00:01:24 +0200 | [diff] [blame] | 607 | _bufferedreader_peek_unlocked(buffered *self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 608 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 609 | _bufferedreader_read_all(buffered *self); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 610 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 611 | _bufferedreader_read_fast(buffered *self, Py_ssize_t); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 612 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 613 | _bufferedreader_read_generic(buffered *self, Py_ssize_t); |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 614 | static Py_ssize_t |
| 615 | _bufferedreader_raw_read(buffered *self, char *start, Py_ssize_t len); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 616 | |
| 617 | /* |
| 618 | * Helpers |
| 619 | */ |
| 620 | |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 621 | /* Sets the current error to BlockingIOError */ |
| 622 | static void |
| 623 | _set_BlockingIOError(char *msg, Py_ssize_t written) |
| 624 | { |
| 625 | PyObject *err; |
| 626 | err = PyObject_CallFunction(PyExc_BlockingIOError, "isn", |
| 627 | errno, msg, written); |
| 628 | if (err) |
| 629 | PyErr_SetObject(PyExc_BlockingIOError, err); |
| 630 | Py_XDECREF(err); |
| 631 | } |
| 632 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 633 | /* Returns the address of the `written` member if a BlockingIOError was |
| 634 | raised, NULL otherwise. The error is always re-raised. */ |
| 635 | static Py_ssize_t * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 636 | _buffered_check_blocking_error(void) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 637 | { |
| 638 | PyObject *t, *v, *tb; |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 639 | PyOSErrorObject *err; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 640 | |
| 641 | PyErr_Fetch(&t, &v, &tb); |
| 642 | if (v == NULL || !PyErr_GivenExceptionMatches(v, PyExc_BlockingIOError)) { |
| 643 | PyErr_Restore(t, v, tb); |
| 644 | return NULL; |
| 645 | } |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 646 | err = (PyOSErrorObject *) v; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 647 | /* TODO: sanity check (err->written >= 0) */ |
| 648 | PyErr_Restore(t, v, tb); |
| 649 | return &err->written; |
| 650 | } |
| 651 | |
| 652 | static Py_off_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 653 | _buffered_raw_tell(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 654 | { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 655 | Py_off_t n; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 656 | PyObject *res; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 657 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_tell, NULL); |
| 658 | if (res == NULL) |
| 659 | return -1; |
| 660 | n = PyNumber_AsOff_t(res, PyExc_ValueError); |
| 661 | Py_DECREF(res); |
| 662 | if (n < 0) { |
| 663 | if (!PyErr_Occurred()) |
| 664 | PyErr_Format(PyExc_IOError, |
Mark Dickinson | 1a0aaaa | 2009-11-24 20:54:11 +0000 | [diff] [blame] | 665 | "Raw stream returned invalid position %" PY_PRIdOFF, |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 666 | (PY_OFF_T_COMPAT)n); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 667 | return -1; |
| 668 | } |
| 669 | self->abs_pos = n; |
| 670 | return n; |
| 671 | } |
| 672 | |
| 673 | static Py_off_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 674 | _buffered_raw_seek(buffered *self, Py_off_t target, int whence) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 675 | { |
| 676 | PyObject *res, *posobj, *whenceobj; |
| 677 | Py_off_t n; |
| 678 | |
| 679 | posobj = PyLong_FromOff_t(target); |
| 680 | if (posobj == NULL) |
| 681 | return -1; |
| 682 | whenceobj = PyLong_FromLong(whence); |
| 683 | if (whenceobj == NULL) { |
| 684 | Py_DECREF(posobj); |
| 685 | return -1; |
| 686 | } |
| 687 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_seek, |
| 688 | posobj, whenceobj, NULL); |
| 689 | Py_DECREF(posobj); |
| 690 | Py_DECREF(whenceobj); |
| 691 | if (res == NULL) |
| 692 | return -1; |
| 693 | n = PyNumber_AsOff_t(res, PyExc_ValueError); |
| 694 | Py_DECREF(res); |
| 695 | if (n < 0) { |
| 696 | if (!PyErr_Occurred()) |
| 697 | PyErr_Format(PyExc_IOError, |
Mark Dickinson | 1a0aaaa | 2009-11-24 20:54:11 +0000 | [diff] [blame] | 698 | "Raw stream returned invalid position %" PY_PRIdOFF, |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 699 | (PY_OFF_T_COMPAT)n); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 700 | return -1; |
| 701 | } |
| 702 | self->abs_pos = n; |
| 703 | return n; |
| 704 | } |
| 705 | |
| 706 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 707 | _buffered_init(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 708 | { |
| 709 | Py_ssize_t n; |
| 710 | if (self->buffer_size <= 0) { |
| 711 | PyErr_SetString(PyExc_ValueError, |
| 712 | "buffer size must be strictly positive"); |
| 713 | return -1; |
| 714 | } |
| 715 | if (self->buffer) |
| 716 | PyMem_Free(self->buffer); |
| 717 | self->buffer = PyMem_Malloc(self->buffer_size); |
| 718 | if (self->buffer == NULL) { |
| 719 | PyErr_NoMemory(); |
| 720 | return -1; |
| 721 | } |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 722 | #ifdef WITH_THREAD |
Antoine Pitrou | c881f15 | 2010-08-01 16:53:42 +0000 | [diff] [blame] | 723 | if (self->lock) |
| 724 | PyThread_free_lock(self->lock); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 725 | self->lock = PyThread_allocate_lock(); |
| 726 | if (self->lock == NULL) { |
| 727 | PyErr_SetString(PyExc_RuntimeError, "can't allocate read lock"); |
| 728 | return -1; |
| 729 | } |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 730 | self->owner = 0; |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 731 | #endif |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 732 | /* Find out whether buffer_size is a power of 2 */ |
| 733 | /* XXX is this optimization useful? */ |
| 734 | for (n = self->buffer_size - 1; n & 1; n >>= 1) |
| 735 | ; |
| 736 | if (n == 0) |
| 737 | self->buffer_mask = self->buffer_size - 1; |
| 738 | else |
| 739 | self->buffer_mask = 0; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 740 | if (_buffered_raw_tell(self) == -1) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 741 | PyErr_Clear(); |
| 742 | return 0; |
| 743 | } |
| 744 | |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 745 | /* Return 1 if an EnvironmentError with errno == EINTR is set (and then |
| 746 | clears the error indicator), 0 otherwise. |
| 747 | Should only be called when PyErr_Occurred() is true. |
| 748 | */ |
| 749 | static int |
| 750 | _trap_eintr(void) |
| 751 | { |
| 752 | static PyObject *eintr_int = NULL; |
| 753 | PyObject *typ, *val, *tb; |
| 754 | PyEnvironmentErrorObject *env_err; |
| 755 | |
| 756 | if (eintr_int == NULL) { |
| 757 | eintr_int = PyLong_FromLong(EINTR); |
| 758 | assert(eintr_int != NULL); |
| 759 | } |
| 760 | if (!PyErr_ExceptionMatches(PyExc_EnvironmentError)) |
| 761 | return 0; |
| 762 | PyErr_Fetch(&typ, &val, &tb); |
| 763 | PyErr_NormalizeException(&typ, &val, &tb); |
| 764 | env_err = (PyEnvironmentErrorObject *) val; |
| 765 | assert(env_err != NULL); |
| 766 | if (env_err->myerrno != NULL && |
| 767 | PyObject_RichCompareBool(env_err->myerrno, eintr_int, Py_EQ) > 0) { |
| 768 | Py_DECREF(typ); |
| 769 | Py_DECREF(val); |
| 770 | Py_XDECREF(tb); |
| 771 | return 1; |
| 772 | } |
| 773 | /* This silences any error set by PyObject_RichCompareBool() */ |
| 774 | PyErr_Restore(typ, val, tb); |
| 775 | return 0; |
| 776 | } |
| 777 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 778 | /* |
| 779 | * Shared methods and wrappers |
| 780 | */ |
| 781 | |
| 782 | static PyObject * |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 783 | buffered_flush_and_rewind_unlocked(buffered *self) |
| 784 | { |
| 785 | PyObject *res; |
| 786 | |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 787 | res = _bufferedwriter_flush_unlocked(self); |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 788 | if (res == NULL) |
| 789 | return NULL; |
| 790 | Py_DECREF(res); |
| 791 | |
| 792 | if (self->readable) { |
| 793 | /* Rewind the raw stream so that its position corresponds to |
| 794 | the current logical position. */ |
| 795 | Py_off_t n; |
| 796 | n = _buffered_raw_seek(self, -RAW_OFFSET(self), 1); |
| 797 | _bufferedreader_reset_buf(self); |
| 798 | if (n == -1) |
| 799 | return NULL; |
| 800 | } |
| 801 | Py_RETURN_NONE; |
| 802 | } |
| 803 | |
| 804 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 805 | buffered_flush(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 806 | { |
| 807 | PyObject *res; |
| 808 | |
| 809 | CHECK_INITIALIZED(self) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 810 | CHECK_CLOSED(self, "flush of closed file") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 811 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 812 | if (!ENTER_BUFFERED(self)) |
| 813 | return NULL; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 814 | res = buffered_flush_and_rewind_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 815 | LEAVE_BUFFERED(self) |
| 816 | |
| 817 | return res; |
| 818 | } |
| 819 | |
| 820 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 821 | buffered_peek(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 822 | { |
| 823 | Py_ssize_t n = 0; |
| 824 | PyObject *res = NULL; |
| 825 | |
| 826 | CHECK_INITIALIZED(self) |
| 827 | if (!PyArg_ParseTuple(args, "|n:peek", &n)) { |
| 828 | return NULL; |
| 829 | } |
| 830 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 831 | if (!ENTER_BUFFERED(self)) |
| 832 | return NULL; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 833 | |
| 834 | if (self->writable) { |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 835 | res = buffered_flush_and_rewind_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 836 | if (res == NULL) |
| 837 | goto end; |
| 838 | Py_CLEAR(res); |
| 839 | } |
Victor Stinner | bc93a11 | 2011-06-01 00:01:24 +0200 | [diff] [blame] | 840 | res = _bufferedreader_peek_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 841 | |
| 842 | end: |
| 843 | LEAVE_BUFFERED(self) |
| 844 | return res; |
| 845 | } |
| 846 | |
| 847 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 848 | buffered_read(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 849 | { |
| 850 | Py_ssize_t n = -1; |
| 851 | PyObject *res; |
| 852 | |
| 853 | CHECK_INITIALIZED(self) |
Benjamin Peterson | bf5ff76 | 2009-12-13 19:25:34 +0000 | [diff] [blame] | 854 | if (!PyArg_ParseTuple(args, "|O&:read", &_PyIO_ConvertSsize_t, &n)) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 855 | return NULL; |
| 856 | } |
| 857 | if (n < -1) { |
| 858 | PyErr_SetString(PyExc_ValueError, |
| 859 | "read length must be positive or -1"); |
| 860 | return NULL; |
| 861 | } |
| 862 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 863 | CHECK_CLOSED(self, "read of closed file") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 864 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 865 | if (n == -1) { |
| 866 | /* The number of bytes is unspecified, read until the end of stream */ |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 867 | if (!ENTER_BUFFERED(self)) |
| 868 | return NULL; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 869 | res = _bufferedreader_read_all(self); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 870 | } |
| 871 | else { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 872 | res = _bufferedreader_read_fast(self, n); |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 873 | if (res != Py_None) |
| 874 | return res; |
| 875 | Py_DECREF(res); |
| 876 | if (!ENTER_BUFFERED(self)) |
| 877 | return NULL; |
| 878 | res = _bufferedreader_read_generic(self, n); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 879 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 880 | |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 881 | LEAVE_BUFFERED(self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 882 | return res; |
| 883 | } |
| 884 | |
| 885 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 886 | buffered_read1(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 887 | { |
| 888 | Py_ssize_t n, have, r; |
| 889 | PyObject *res = NULL; |
| 890 | |
| 891 | CHECK_INITIALIZED(self) |
| 892 | if (!PyArg_ParseTuple(args, "n:read1", &n)) { |
| 893 | return NULL; |
| 894 | } |
| 895 | |
| 896 | if (n < 0) { |
| 897 | PyErr_SetString(PyExc_ValueError, |
| 898 | "read length must be positive"); |
| 899 | return NULL; |
| 900 | } |
| 901 | if (n == 0) |
| 902 | return PyBytes_FromStringAndSize(NULL, 0); |
| 903 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 904 | /* Return up to n bytes. If at least one byte is buffered, we |
| 905 | only return buffered bytes. Otherwise, we do one raw read. */ |
| 906 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 907 | have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 908 | if (have > 0) { |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 909 | n = Py_MIN(have, n); |
| 910 | res = _bufferedreader_read_fast(self, n); |
| 911 | assert(res != Py_None); |
| 912 | return res; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 913 | } |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 914 | res = PyBytes_FromStringAndSize(NULL, n); |
| 915 | if (res == NULL) |
| 916 | return NULL; |
| 917 | if (!ENTER_BUFFERED(self)) { |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 918 | Py_DECREF(res); |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 919 | return NULL; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 920 | } |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 921 | _bufferedreader_reset_buf(self); |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 922 | r = _bufferedreader_raw_read(self, PyBytes_AS_STRING(res), n); |
| 923 | LEAVE_BUFFERED(self) |
| 924 | if (r == -1) { |
| 925 | Py_DECREF(res); |
| 926 | return NULL; |
| 927 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 928 | if (r == -2) |
| 929 | r = 0; |
| 930 | if (n > r) |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 931 | _PyBytes_Resize(&res, r); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 932 | return res; |
| 933 | } |
| 934 | |
| 935 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 936 | buffered_readinto(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 937 | { |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 938 | Py_buffer buf; |
| 939 | Py_ssize_t n, written = 0, remaining; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 940 | PyObject *res = NULL; |
| 941 | |
| 942 | CHECK_INITIALIZED(self) |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 943 | |
| 944 | if (!PyArg_ParseTuple(args, "w*:readinto", &buf)) |
| 945 | return NULL; |
| 946 | |
| 947 | n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 948 | if (n > 0) { |
| 949 | if (n >= buf.len) { |
| 950 | memcpy(buf.buf, self->buffer + self->pos, buf.len); |
| 951 | self->pos += buf.len; |
| 952 | res = PyLong_FromSsize_t(buf.len); |
| 953 | goto end_unlocked; |
| 954 | } |
| 955 | memcpy(buf.buf, self->buffer + self->pos, n); |
| 956 | self->pos += n; |
| 957 | written = n; |
| 958 | } |
| 959 | |
| 960 | if (!ENTER_BUFFERED(self)) |
| 961 | goto end_unlocked; |
| 962 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 963 | if (self->writable) { |
Antoine Pitrou | e8bb1a0 | 2011-08-20 14:52:04 +0200 | [diff] [blame] | 964 | res = buffered_flush_and_rewind_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 965 | if (res == NULL) |
| 966 | goto end; |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 967 | Py_CLEAR(res); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 968 | } |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 969 | |
| 970 | _bufferedreader_reset_buf(self); |
| 971 | self->pos = 0; |
| 972 | |
| 973 | for (remaining = buf.len - written; |
| 974 | remaining > 0; |
| 975 | written += n, remaining -= n) { |
| 976 | /* If remaining bytes is larger than internal buffer size, copy |
| 977 | * directly into caller's buffer. */ |
| 978 | if (remaining > self->buffer_size) { |
Antoine Pitrou | 4e19e11 | 2011-05-12 02:07:00 +0200 | [diff] [blame] | 979 | n = _bufferedreader_raw_read(self, (char *) buf.buf + written, |
| 980 | remaining); |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 981 | } |
| 982 | else { |
| 983 | n = _bufferedreader_fill_buffer(self); |
| 984 | if (n > 0) { |
| 985 | if (n > remaining) |
| 986 | n = remaining; |
Antoine Pitrou | 4e19e11 | 2011-05-12 02:07:00 +0200 | [diff] [blame] | 987 | memcpy((char *) buf.buf + written, |
| 988 | self->buffer + self->pos, n); |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 989 | self->pos += n; |
| 990 | continue; /* short circuit */ |
| 991 | } |
| 992 | } |
| 993 | if (n == 0 || (n == -2 && written > 0)) |
| 994 | break; |
| 995 | if (n < 0) { |
| 996 | if (n == -2) { |
| 997 | Py_INCREF(Py_None); |
| 998 | res = Py_None; |
| 999 | } |
| 1000 | goto end; |
| 1001 | } |
| 1002 | } |
| 1003 | res = PyLong_FromSsize_t(written); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1004 | |
| 1005 | end: |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1006 | LEAVE_BUFFERED(self); |
| 1007 | end_unlocked: |
| 1008 | PyBuffer_Release(&buf); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1009 | return res; |
| 1010 | } |
| 1011 | |
| 1012 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1013 | _buffered_readline(buffered *self, Py_ssize_t limit) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1014 | { |
| 1015 | PyObject *res = NULL; |
| 1016 | PyObject *chunks = NULL; |
| 1017 | Py_ssize_t n, written = 0; |
| 1018 | const char *start, *s, *end; |
| 1019 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1020 | CHECK_CLOSED(self, "readline of closed file") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1021 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1022 | /* First, try to find a line in the buffer. This can run unlocked because |
| 1023 | the calls to the C API are simple enough that they can't trigger |
| 1024 | any thread switch. */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1025 | n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1026 | if (limit >= 0 && n > limit) |
| 1027 | n = limit; |
| 1028 | start = self->buffer + self->pos; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1029 | s = memchr(start, '\n', n); |
| 1030 | if (s != NULL) { |
| 1031 | res = PyBytes_FromStringAndSize(start, s - start + 1); |
| 1032 | if (res != NULL) |
| 1033 | self->pos += s - start + 1; |
| 1034 | goto end_unlocked; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1035 | } |
| 1036 | if (n == limit) { |
| 1037 | res = PyBytes_FromStringAndSize(start, n); |
| 1038 | if (res != NULL) |
| 1039 | self->pos += n; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1040 | goto end_unlocked; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1041 | } |
| 1042 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 1043 | if (!ENTER_BUFFERED(self)) |
| 1044 | goto end_unlocked; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1045 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1046 | /* Now we try to get some more from the raw stream */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1047 | chunks = PyList_New(0); |
| 1048 | if (chunks == NULL) |
| 1049 | goto end; |
| 1050 | if (n > 0) { |
| 1051 | res = PyBytes_FromStringAndSize(start, n); |
| 1052 | if (res == NULL) |
| 1053 | goto end; |
| 1054 | if (PyList_Append(chunks, res) < 0) { |
| 1055 | Py_CLEAR(res); |
| 1056 | goto end; |
| 1057 | } |
| 1058 | Py_CLEAR(res); |
| 1059 | written += n; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1060 | self->pos += n; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1061 | if (limit >= 0) |
| 1062 | limit -= n; |
| 1063 | } |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1064 | if (self->writable) { |
| 1065 | PyObject *r = buffered_flush_and_rewind_unlocked(self); |
| 1066 | if (r == NULL) |
| 1067 | goto end; |
| 1068 | Py_DECREF(r); |
| 1069 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1070 | |
| 1071 | for (;;) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1072 | _bufferedreader_reset_buf(self); |
| 1073 | n = _bufferedreader_fill_buffer(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1074 | if (n == -1) |
| 1075 | goto end; |
| 1076 | if (n <= 0) |
| 1077 | break; |
| 1078 | if (limit >= 0 && n > limit) |
| 1079 | n = limit; |
| 1080 | start = self->buffer; |
| 1081 | end = start + n; |
| 1082 | s = start; |
| 1083 | while (s < end) { |
| 1084 | if (*s++ == '\n') { |
| 1085 | res = PyBytes_FromStringAndSize(start, s - start); |
| 1086 | if (res == NULL) |
| 1087 | goto end; |
| 1088 | self->pos = s - start; |
| 1089 | goto found; |
| 1090 | } |
| 1091 | } |
| 1092 | res = PyBytes_FromStringAndSize(start, n); |
| 1093 | if (res == NULL) |
| 1094 | goto end; |
| 1095 | if (n == limit) { |
| 1096 | self->pos = n; |
| 1097 | break; |
| 1098 | } |
| 1099 | if (PyList_Append(chunks, res) < 0) { |
| 1100 | Py_CLEAR(res); |
| 1101 | goto end; |
| 1102 | } |
| 1103 | Py_CLEAR(res); |
| 1104 | written += n; |
| 1105 | if (limit >= 0) |
| 1106 | limit -= n; |
| 1107 | } |
| 1108 | found: |
| 1109 | if (res != NULL && PyList_Append(chunks, res) < 0) { |
| 1110 | Py_CLEAR(res); |
| 1111 | goto end; |
| 1112 | } |
| 1113 | Py_CLEAR(res); |
| 1114 | res = _PyBytes_Join(_PyIO_empty_bytes, chunks); |
| 1115 | |
| 1116 | end: |
| 1117 | LEAVE_BUFFERED(self) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1118 | end_unlocked: |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1119 | Py_XDECREF(chunks); |
| 1120 | return res; |
| 1121 | } |
| 1122 | |
| 1123 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1124 | buffered_readline(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1125 | { |
| 1126 | Py_ssize_t limit = -1; |
| 1127 | |
| 1128 | CHECK_INITIALIZED(self) |
Benjamin Peterson | bf5ff76 | 2009-12-13 19:25:34 +0000 | [diff] [blame] | 1129 | if (!PyArg_ParseTuple(args, "|O&:readline", &_PyIO_ConvertSsize_t, &limit)) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1130 | return NULL; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1131 | return _buffered_readline(self, limit); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1132 | } |
| 1133 | |
| 1134 | |
| 1135 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1136 | buffered_tell(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1137 | { |
| 1138 | Py_off_t pos; |
| 1139 | |
| 1140 | CHECK_INITIALIZED(self) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1141 | pos = _buffered_raw_tell(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1142 | if (pos == -1) |
| 1143 | return NULL; |
| 1144 | pos -= RAW_OFFSET(self); |
| 1145 | /* TODO: sanity check (pos >= 0) */ |
| 1146 | return PyLong_FromOff_t(pos); |
| 1147 | } |
| 1148 | |
| 1149 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1150 | buffered_seek(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1151 | { |
| 1152 | Py_off_t target, n; |
| 1153 | int whence = 0; |
| 1154 | PyObject *targetobj, *res = NULL; |
| 1155 | |
| 1156 | CHECK_INITIALIZED(self) |
| 1157 | if (!PyArg_ParseTuple(args, "O|i:seek", &targetobj, &whence)) { |
| 1158 | return NULL; |
| 1159 | } |
Jesus Cea | 990eff0 | 2012-04-26 17:05:31 +0200 | [diff] [blame] | 1160 | if (whence < 0 || whence > 2) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1161 | PyErr_Format(PyExc_ValueError, |
Jesus Cea | 990eff0 | 2012-04-26 17:05:31 +0200 | [diff] [blame] | 1162 | "whence must be between 0 and 2, not %d", whence); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1163 | return NULL; |
| 1164 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1165 | |
| 1166 | CHECK_CLOSED(self, "seek of closed file") |
| 1167 | |
Antoine Pitrou | 1e44fec | 2011-10-04 12:26:20 +0200 | [diff] [blame] | 1168 | if (_PyIOBase_check_seekable(self->raw, Py_True) == NULL) |
| 1169 | return NULL; |
| 1170 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1171 | target = PyNumber_AsOff_t(targetobj, PyExc_ValueError); |
| 1172 | if (target == -1 && PyErr_Occurred()) |
| 1173 | return NULL; |
| 1174 | |
Jesus Cea | 990eff0 | 2012-04-26 17:05:31 +0200 | [diff] [blame] | 1175 | if (whence != 2 && self->readable) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1176 | Py_off_t current, avail; |
| 1177 | /* Check if seeking leaves us inside the current buffer, |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1178 | so as to return quickly if possible. Also, we needn't take the |
| 1179 | lock in this fast path. |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1180 | Don't know how to do that when whence == 2, though. */ |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1181 | /* NOTE: RAW_TELL() can release the GIL but the object is in a stable |
| 1182 | state at this point. */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1183 | current = RAW_TELL(self); |
| 1184 | avail = READAHEAD(self); |
| 1185 | if (avail > 0) { |
| 1186 | Py_off_t offset; |
| 1187 | if (whence == 0) |
| 1188 | offset = target - (current - RAW_OFFSET(self)); |
| 1189 | else |
| 1190 | offset = target; |
| 1191 | if (offset >= -self->pos && offset <= avail) { |
| 1192 | self->pos += offset; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1193 | return PyLong_FromOff_t(current - avail + offset); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1194 | } |
| 1195 | } |
| 1196 | } |
| 1197 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 1198 | if (!ENTER_BUFFERED(self)) |
| 1199 | return NULL; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1200 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1201 | /* Fallback: invoke raw seek() method and clear buffer */ |
| 1202 | if (self->writable) { |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1203 | res = _bufferedwriter_flush_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1204 | if (res == NULL) |
| 1205 | goto end; |
| 1206 | Py_CLEAR(res); |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1207 | _bufferedwriter_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1208 | } |
| 1209 | |
| 1210 | /* TODO: align on block boundary and read buffer if needed? */ |
| 1211 | if (whence == 1) |
| 1212 | target -= RAW_OFFSET(self); |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1213 | n = _buffered_raw_seek(self, target, whence); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1214 | if (n == -1) |
| 1215 | goto end; |
| 1216 | self->raw_pos = -1; |
| 1217 | res = PyLong_FromOff_t(n); |
| 1218 | if (res != NULL && self->readable) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1219 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1220 | |
| 1221 | end: |
| 1222 | LEAVE_BUFFERED(self) |
| 1223 | return res; |
| 1224 | } |
| 1225 | |
| 1226 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1227 | buffered_truncate(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1228 | { |
| 1229 | PyObject *pos = Py_None; |
| 1230 | PyObject *res = NULL; |
| 1231 | |
| 1232 | CHECK_INITIALIZED(self) |
| 1233 | if (!PyArg_ParseTuple(args, "|O:truncate", &pos)) { |
| 1234 | return NULL; |
| 1235 | } |
| 1236 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 1237 | if (!ENTER_BUFFERED(self)) |
| 1238 | return NULL; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1239 | |
| 1240 | if (self->writable) { |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1241 | res = buffered_flush_and_rewind_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1242 | if (res == NULL) |
| 1243 | goto end; |
| 1244 | Py_CLEAR(res); |
| 1245 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1246 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_truncate, pos, NULL); |
| 1247 | if (res == NULL) |
| 1248 | goto end; |
| 1249 | /* Reset cached position */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1250 | if (_buffered_raw_tell(self) == -1) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1251 | PyErr_Clear(); |
| 1252 | |
| 1253 | end: |
| 1254 | LEAVE_BUFFERED(self) |
| 1255 | return res; |
| 1256 | } |
| 1257 | |
| 1258 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1259 | buffered_iternext(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1260 | { |
| 1261 | PyObject *line; |
| 1262 | PyTypeObject *tp; |
| 1263 | |
| 1264 | CHECK_INITIALIZED(self); |
| 1265 | |
| 1266 | tp = Py_TYPE(self); |
| 1267 | if (tp == &PyBufferedReader_Type || |
| 1268 | tp == &PyBufferedRandom_Type) { |
| 1269 | /* Skip method call overhead for speed */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1270 | line = _buffered_readline(self, -1); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1271 | } |
| 1272 | else { |
| 1273 | line = PyObject_CallMethodObjArgs((PyObject *)self, |
| 1274 | _PyIO_str_readline, NULL); |
| 1275 | if (line && !PyBytes_Check(line)) { |
| 1276 | PyErr_Format(PyExc_IOError, |
| 1277 | "readline() should have returned a bytes object, " |
| 1278 | "not '%.200s'", Py_TYPE(line)->tp_name); |
| 1279 | Py_DECREF(line); |
| 1280 | return NULL; |
| 1281 | } |
| 1282 | } |
| 1283 | |
| 1284 | if (line == NULL) |
| 1285 | return NULL; |
| 1286 | |
| 1287 | if (PyBytes_GET_SIZE(line) == 0) { |
| 1288 | /* Reached EOF or would have blocked */ |
| 1289 | Py_DECREF(line); |
| 1290 | return NULL; |
| 1291 | } |
| 1292 | |
| 1293 | return line; |
| 1294 | } |
| 1295 | |
Antoine Pitrou | 716c444 | 2009-05-23 19:04:03 +0000 | [diff] [blame] | 1296 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1297 | buffered_repr(buffered *self) |
Antoine Pitrou | 716c444 | 2009-05-23 19:04:03 +0000 | [diff] [blame] | 1298 | { |
| 1299 | PyObject *nameobj, *res; |
| 1300 | |
Martin v. Löwis | 767046a | 2011-10-14 15:35:36 +0200 | [diff] [blame] | 1301 | nameobj = _PyObject_GetAttrId((PyObject *) self, &PyId_name); |
Antoine Pitrou | 716c444 | 2009-05-23 19:04:03 +0000 | [diff] [blame] | 1302 | if (nameobj == NULL) { |
| 1303 | if (PyErr_ExceptionMatches(PyExc_AttributeError)) |
| 1304 | PyErr_Clear(); |
| 1305 | else |
| 1306 | return NULL; |
| 1307 | res = PyUnicode_FromFormat("<%s>", Py_TYPE(self)->tp_name); |
| 1308 | } |
| 1309 | else { |
| 1310 | res = PyUnicode_FromFormat("<%s name=%R>", |
| 1311 | Py_TYPE(self)->tp_name, nameobj); |
| 1312 | Py_DECREF(nameobj); |
| 1313 | } |
| 1314 | return res; |
| 1315 | } |
| 1316 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1317 | /* |
| 1318 | * class BufferedReader |
| 1319 | */ |
| 1320 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1321 | PyDoc_STRVAR(bufferedreader_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1322 | "Create a new buffered reader using the given readable raw IO object."); |
| 1323 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1324 | static void _bufferedreader_reset_buf(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1325 | { |
| 1326 | self->read_end = -1; |
| 1327 | } |
| 1328 | |
| 1329 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1330 | bufferedreader_init(buffered *self, PyObject *args, PyObject *kwds) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1331 | { |
| 1332 | char *kwlist[] = {"raw", "buffer_size", NULL}; |
| 1333 | Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
| 1334 | PyObject *raw; |
| 1335 | |
| 1336 | self->ok = 0; |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 1337 | self->detached = 0; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1338 | |
| 1339 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|n:BufferedReader", kwlist, |
| 1340 | &raw, &buffer_size)) { |
| 1341 | return -1; |
| 1342 | } |
| 1343 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1344 | if (_PyIOBase_check_readable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1345 | return -1; |
| 1346 | |
| 1347 | Py_CLEAR(self->raw); |
| 1348 | Py_INCREF(raw); |
| 1349 | self->raw = raw; |
| 1350 | self->buffer_size = buffer_size; |
| 1351 | self->readable = 1; |
| 1352 | self->writable = 0; |
| 1353 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1354 | if (_buffered_init(self) < 0) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1355 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1356 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1357 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1358 | self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedReader_Type && |
| 1359 | Py_TYPE(raw) == &PyFileIO_Type); |
| 1360 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1361 | self->ok = 1; |
| 1362 | return 0; |
| 1363 | } |
| 1364 | |
| 1365 | static Py_ssize_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1366 | _bufferedreader_raw_read(buffered *self, char *start, Py_ssize_t len) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1367 | { |
| 1368 | Py_buffer buf; |
| 1369 | PyObject *memobj, *res; |
| 1370 | Py_ssize_t n; |
| 1371 | /* NOTE: the buffer needn't be released as its object is NULL. */ |
| 1372 | if (PyBuffer_FillInfo(&buf, NULL, start, len, 0, PyBUF_CONTIG) == -1) |
| 1373 | return -1; |
| 1374 | memobj = PyMemoryView_FromBuffer(&buf); |
| 1375 | if (memobj == NULL) |
| 1376 | return -1; |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 1377 | /* NOTE: PyErr_SetFromErrno() calls PyErr_CheckSignals() when EINTR |
| 1378 | occurs so we needn't do it ourselves. |
| 1379 | We then retry reading, ignoring the signal if no handler has |
| 1380 | raised (see issue #10956). |
| 1381 | */ |
| 1382 | do { |
| 1383 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readinto, memobj, NULL); |
| 1384 | } while (res == NULL && _trap_eintr()); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1385 | Py_DECREF(memobj); |
| 1386 | if (res == NULL) |
| 1387 | return -1; |
| 1388 | if (res == Py_None) { |
| 1389 | /* Non-blocking stream would have blocked. Special return code! */ |
| 1390 | Py_DECREF(res); |
| 1391 | return -2; |
| 1392 | } |
| 1393 | n = PyNumber_AsSsize_t(res, PyExc_ValueError); |
| 1394 | Py_DECREF(res); |
| 1395 | if (n < 0 || n > len) { |
| 1396 | PyErr_Format(PyExc_IOError, |
| 1397 | "raw readinto() returned invalid length %zd " |
| 1398 | "(should have been between 0 and %zd)", n, len); |
| 1399 | return -1; |
| 1400 | } |
| 1401 | if (n > 0 && self->abs_pos != -1) |
| 1402 | self->abs_pos += n; |
| 1403 | return n; |
| 1404 | } |
| 1405 | |
| 1406 | static Py_ssize_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1407 | _bufferedreader_fill_buffer(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1408 | { |
| 1409 | Py_ssize_t start, len, n; |
| 1410 | if (VALID_READ_BUFFER(self)) |
| 1411 | start = Py_SAFE_DOWNCAST(self->read_end, Py_off_t, Py_ssize_t); |
| 1412 | else |
| 1413 | start = 0; |
| 1414 | len = self->buffer_size - start; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1415 | n = _bufferedreader_raw_read(self, self->buffer + start, len); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1416 | if (n <= 0) |
| 1417 | return n; |
| 1418 | self->read_end = start + n; |
| 1419 | self->raw_pos = start + n; |
| 1420 | return n; |
| 1421 | } |
| 1422 | |
| 1423 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1424 | _bufferedreader_read_all(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1425 | { |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1426 | Py_ssize_t current_size; |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1427 | PyObject *res, *data = NULL, *chunk, *chunks; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1428 | |
| 1429 | /* First copy what we have in the current buffer. */ |
| 1430 | current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1431 | if (current_size) { |
| 1432 | data = PyBytes_FromStringAndSize( |
| 1433 | self->buffer + self->pos, current_size); |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1434 | if (data == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1435 | return NULL; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1436 | self->pos += current_size; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1437 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1438 | /* We're going past the buffer's bounds, flush it */ |
| 1439 | if (self->writable) { |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1440 | res = buffered_flush_and_rewind_unlocked(self); |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1441 | if (res == NULL) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1442 | return NULL; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1443 | Py_CLEAR(res); |
| 1444 | } |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1445 | _bufferedreader_reset_buf(self); |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1446 | |
| 1447 | if (PyObject_HasAttr(self->raw, _PyIO_str_readall)) { |
| 1448 | chunk = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readall, NULL); |
| 1449 | if (chunk == NULL) |
| 1450 | return NULL; |
| 1451 | if (chunk != Py_None && !PyBytes_Check(chunk)) { |
| 1452 | Py_XDECREF(data); |
| 1453 | Py_DECREF(chunk); |
| 1454 | PyErr_SetString(PyExc_TypeError, "readall() should return bytes"); |
| 1455 | return NULL; |
| 1456 | } |
| 1457 | if (chunk == Py_None) { |
| 1458 | if (current_size == 0) |
| 1459 | return chunk; |
| 1460 | else { |
| 1461 | Py_DECREF(chunk); |
| 1462 | return data; |
| 1463 | } |
| 1464 | } |
| 1465 | else if (current_size) { |
| 1466 | PyBytes_Concat(&data, chunk); |
| 1467 | Py_DECREF(chunk); |
| 1468 | if (data == NULL) |
| 1469 | return NULL; |
| 1470 | return data; |
| 1471 | } else |
| 1472 | return chunk; |
| 1473 | } |
| 1474 | |
| 1475 | chunks = PyList_New(0); |
| 1476 | if (chunks == NULL) |
| 1477 | return NULL; |
| 1478 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1479 | while (1) { |
| 1480 | if (data) { |
| 1481 | if (PyList_Append(chunks, data) < 0) { |
| 1482 | Py_DECREF(data); |
| 1483 | Py_DECREF(chunks); |
| 1484 | return NULL; |
| 1485 | } |
| 1486 | Py_DECREF(data); |
| 1487 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1488 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1489 | /* Read until EOF or until read() would block. */ |
| 1490 | data = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_read, NULL); |
| 1491 | if (data == NULL) { |
| 1492 | Py_DECREF(chunks); |
| 1493 | return NULL; |
| 1494 | } |
| 1495 | if (data != Py_None && !PyBytes_Check(data)) { |
| 1496 | Py_DECREF(data); |
| 1497 | Py_DECREF(chunks); |
| 1498 | PyErr_SetString(PyExc_TypeError, "read() should return bytes"); |
| 1499 | return NULL; |
| 1500 | } |
| 1501 | if (data == Py_None || PyBytes_GET_SIZE(data) == 0) { |
| 1502 | if (current_size == 0) { |
| 1503 | Py_DECREF(chunks); |
| 1504 | return data; |
| 1505 | } |
| 1506 | else { |
| 1507 | res = _PyBytes_Join(_PyIO_empty_bytes, chunks); |
| 1508 | Py_DECREF(data); |
| 1509 | Py_DECREF(chunks); |
| 1510 | return res; |
| 1511 | } |
| 1512 | } |
| 1513 | current_size += PyBytes_GET_SIZE(data); |
| 1514 | if (self->abs_pos != -1) |
| 1515 | self->abs_pos += PyBytes_GET_SIZE(data); |
| 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | /* Read n bytes from the buffer if it can, otherwise return None. |
| 1520 | This function is simple enough that it can run unlocked. */ |
| 1521 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1522 | _bufferedreader_read_fast(buffered *self, Py_ssize_t n) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1523 | { |
| 1524 | Py_ssize_t current_size; |
| 1525 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1526 | current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1527 | if (n <= current_size) { |
| 1528 | /* Fast path: the data to read is fully buffered. */ |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1529 | PyObject *res = PyBytes_FromStringAndSize(self->buffer + self->pos, n); |
| 1530 | if (res != NULL) |
| 1531 | self->pos += n; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1532 | return res; |
| 1533 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1534 | Py_RETURN_NONE; |
| 1535 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1536 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1537 | /* Generic read function: read from the stream until enough bytes are read, |
| 1538 | * or until an EOF occurs or until read() would block. |
| 1539 | */ |
| 1540 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1541 | _bufferedreader_read_generic(buffered *self, Py_ssize_t n) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1542 | { |
| 1543 | PyObject *res = NULL; |
| 1544 | Py_ssize_t current_size, remaining, written; |
| 1545 | char *out; |
| 1546 | |
| 1547 | current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1548 | if (n <= current_size) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1549 | return _bufferedreader_read_fast(self, n); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1550 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1551 | res = PyBytes_FromStringAndSize(NULL, n); |
| 1552 | if (res == NULL) |
| 1553 | goto error; |
| 1554 | out = PyBytes_AS_STRING(res); |
| 1555 | remaining = n; |
| 1556 | written = 0; |
| 1557 | if (current_size > 0) { |
| 1558 | memcpy(out, self->buffer + self->pos, current_size); |
| 1559 | remaining -= current_size; |
| 1560 | written += current_size; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1561 | self->pos += current_size; |
| 1562 | } |
| 1563 | /* Flush the write buffer if necessary */ |
| 1564 | if (self->writable) { |
| 1565 | PyObject *r = buffered_flush_and_rewind_unlocked(self); |
| 1566 | if (r == NULL) |
| 1567 | goto error; |
| 1568 | Py_DECREF(r); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1569 | } |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1570 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1571 | while (remaining > 0) { |
| 1572 | /* We want to read a whole block at the end into buffer. |
| 1573 | If we had readv() we could do this in one pass. */ |
| 1574 | Py_ssize_t r = MINUS_LAST_BLOCK(self, remaining); |
| 1575 | if (r == 0) |
| 1576 | break; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1577 | r = _bufferedreader_raw_read(self, out + written, r); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1578 | if (r == -1) |
| 1579 | goto error; |
| 1580 | if (r == 0 || r == -2) { |
| 1581 | /* EOF occurred or read() would block. */ |
| 1582 | if (r == 0 || written > 0) { |
| 1583 | if (_PyBytes_Resize(&res, written)) |
| 1584 | goto error; |
| 1585 | return res; |
| 1586 | } |
| 1587 | Py_DECREF(res); |
| 1588 | Py_INCREF(Py_None); |
| 1589 | return Py_None; |
| 1590 | } |
| 1591 | remaining -= r; |
| 1592 | written += r; |
| 1593 | } |
| 1594 | assert(remaining <= self->buffer_size); |
| 1595 | self->pos = 0; |
| 1596 | self->raw_pos = 0; |
| 1597 | self->read_end = 0; |
Antoine Pitrou | 32cfede | 2010-08-11 13:31:33 +0000 | [diff] [blame] | 1598 | /* NOTE: when the read is satisfied, we avoid issuing any additional |
| 1599 | reads, which could block indefinitely (e.g. on a socket). |
| 1600 | See issue #9550. */ |
| 1601 | while (remaining > 0 && self->read_end < self->buffer_size) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1602 | Py_ssize_t r = _bufferedreader_fill_buffer(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1603 | if (r == -1) |
| 1604 | goto error; |
| 1605 | if (r == 0 || r == -2) { |
| 1606 | /* EOF occurred or read() would block. */ |
| 1607 | if (r == 0 || written > 0) { |
| 1608 | if (_PyBytes_Resize(&res, written)) |
| 1609 | goto error; |
| 1610 | return res; |
| 1611 | } |
| 1612 | Py_DECREF(res); |
| 1613 | Py_INCREF(Py_None); |
| 1614 | return Py_None; |
| 1615 | } |
| 1616 | if (remaining > r) { |
| 1617 | memcpy(out + written, self->buffer + self->pos, r); |
| 1618 | written += r; |
| 1619 | self->pos += r; |
| 1620 | remaining -= r; |
| 1621 | } |
| 1622 | else if (remaining > 0) { |
| 1623 | memcpy(out + written, self->buffer + self->pos, remaining); |
| 1624 | written += remaining; |
| 1625 | self->pos += remaining; |
| 1626 | remaining = 0; |
| 1627 | } |
| 1628 | if (remaining == 0) |
| 1629 | break; |
| 1630 | } |
| 1631 | |
| 1632 | return res; |
| 1633 | |
| 1634 | error: |
| 1635 | Py_XDECREF(res); |
| 1636 | return NULL; |
| 1637 | } |
| 1638 | |
| 1639 | static PyObject * |
Victor Stinner | bc93a11 | 2011-06-01 00:01:24 +0200 | [diff] [blame] | 1640 | _bufferedreader_peek_unlocked(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1641 | { |
| 1642 | Py_ssize_t have, r; |
| 1643 | |
| 1644 | have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1645 | /* Constraints: |
| 1646 | 1. we don't want to advance the file position. |
| 1647 | 2. we don't want to lose block alignment, so we can't shift the buffer |
| 1648 | to make some place. |
| 1649 | Therefore, we either return `have` bytes (if > 0), or a full buffer. |
| 1650 | */ |
| 1651 | if (have > 0) { |
| 1652 | return PyBytes_FromStringAndSize(self->buffer + self->pos, have); |
| 1653 | } |
| 1654 | |
| 1655 | /* Fill the buffer from the raw stream, and copy it to the result. */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1656 | _bufferedreader_reset_buf(self); |
| 1657 | r = _bufferedreader_fill_buffer(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1658 | if (r == -1) |
| 1659 | return NULL; |
| 1660 | if (r == -2) |
| 1661 | r = 0; |
| 1662 | self->pos = 0; |
| 1663 | return PyBytes_FromStringAndSize(self->buffer, r); |
| 1664 | } |
| 1665 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1666 | static PyMethodDef bufferedreader_methods[] = { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1667 | /* BufferedIOMixin methods */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1668 | {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| 1669 | {"flush", (PyCFunction)buffered_simple_flush, METH_NOARGS}, |
| 1670 | {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| 1671 | {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| 1672 | {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| 1673 | {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| 1674 | {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| 1675 | {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 1676 | {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 1677 | {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1678 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1679 | {"read", (PyCFunction)buffered_read, METH_VARARGS}, |
| 1680 | {"peek", (PyCFunction)buffered_peek, METH_VARARGS}, |
| 1681 | {"read1", (PyCFunction)buffered_read1, METH_VARARGS}, |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1682 | {"readinto", (PyCFunction)buffered_readinto, METH_VARARGS}, |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1683 | {"readline", (PyCFunction)buffered_readline, METH_VARARGS}, |
| 1684 | {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| 1685 | {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
| 1686 | {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1687 | {NULL, NULL} |
| 1688 | }; |
| 1689 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1690 | static PyMemberDef bufferedreader_members[] = { |
Antoine Pitrou | 7f8f418 | 2010-12-21 21:20:59 +0000 | [diff] [blame] | 1691 | {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1692 | {NULL} |
| 1693 | }; |
| 1694 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1695 | static PyGetSetDef bufferedreader_getset[] = { |
| 1696 | {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| 1697 | {"name", (getter)buffered_name_get, NULL, NULL}, |
| 1698 | {"mode", (getter)buffered_mode_get, NULL, NULL}, |
Benjamin Peterson | 1fea321 | 2009-04-19 03:15:20 +0000 | [diff] [blame] | 1699 | {NULL} |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1700 | }; |
| 1701 | |
| 1702 | |
| 1703 | PyTypeObject PyBufferedReader_Type = { |
| 1704 | PyVarObject_HEAD_INIT(NULL, 0) |
| 1705 | "_io.BufferedReader", /*tp_name*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1706 | sizeof(buffered), /*tp_basicsize*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1707 | 0, /*tp_itemsize*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1708 | (destructor)buffered_dealloc, /*tp_dealloc*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1709 | 0, /*tp_print*/ |
| 1710 | 0, /*tp_getattr*/ |
| 1711 | 0, /*tp_setattr*/ |
| 1712 | 0, /*tp_compare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1713 | (reprfunc)buffered_repr, /*tp_repr*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1714 | 0, /*tp_as_number*/ |
| 1715 | 0, /*tp_as_sequence*/ |
| 1716 | 0, /*tp_as_mapping*/ |
| 1717 | 0, /*tp_hash */ |
| 1718 | 0, /*tp_call*/ |
| 1719 | 0, /*tp_str*/ |
| 1720 | 0, /*tp_getattro*/ |
| 1721 | 0, /*tp_setattro*/ |
| 1722 | 0, /*tp_as_buffer*/ |
| 1723 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| 1724 | | Py_TPFLAGS_HAVE_GC, /*tp_flags*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1725 | bufferedreader_doc, /* tp_doc */ |
| 1726 | (traverseproc)buffered_traverse, /* tp_traverse */ |
| 1727 | (inquiry)buffered_clear, /* tp_clear */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1728 | 0, /* tp_richcompare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1729 | offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1730 | 0, /* tp_iter */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1731 | (iternextfunc)buffered_iternext, /* tp_iternext */ |
| 1732 | bufferedreader_methods, /* tp_methods */ |
| 1733 | bufferedreader_members, /* tp_members */ |
| 1734 | bufferedreader_getset, /* tp_getset */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1735 | 0, /* tp_base */ |
| 1736 | 0, /* tp_dict */ |
| 1737 | 0, /* tp_descr_get */ |
| 1738 | 0, /* tp_descr_set */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1739 | offsetof(buffered, dict), /* tp_dictoffset */ |
| 1740 | (initproc)bufferedreader_init, /* tp_init */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1741 | 0, /* tp_alloc */ |
| 1742 | PyType_GenericNew, /* tp_new */ |
| 1743 | }; |
| 1744 | |
| 1745 | |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 1746 | |
| 1747 | static int |
| 1748 | complain_about_max_buffer_size(void) |
| 1749 | { |
| 1750 | if (PyErr_WarnEx(PyExc_DeprecationWarning, |
| 1751 | "max_buffer_size is deprecated", 1) < 0) |
| 1752 | return 0; |
| 1753 | return 1; |
| 1754 | } |
| 1755 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1756 | /* |
| 1757 | * class BufferedWriter |
| 1758 | */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1759 | PyDoc_STRVAR(bufferedwriter_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1760 | "A buffer for a writeable sequential RawIO object.\n" |
| 1761 | "\n" |
| 1762 | "The constructor creates a BufferedWriter for the given writeable raw\n" |
| 1763 | "stream. If the buffer_size is not given, it defaults to\n" |
| 1764 | "DEFAULT_BUFFER_SIZE. max_buffer_size isn't used anymore.\n" |
| 1765 | ); |
| 1766 | |
| 1767 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1768 | _bufferedwriter_reset_buf(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1769 | { |
| 1770 | self->write_pos = 0; |
| 1771 | self->write_end = -1; |
| 1772 | } |
| 1773 | |
| 1774 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1775 | bufferedwriter_init(buffered *self, PyObject *args, PyObject *kwds) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1776 | { |
| 1777 | /* TODO: properly deprecate max_buffer_size */ |
| 1778 | char *kwlist[] = {"raw", "buffer_size", "max_buffer_size", NULL}; |
| 1779 | Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 1780 | Py_ssize_t max_buffer_size = -234; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1781 | PyObject *raw; |
| 1782 | |
| 1783 | self->ok = 0; |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 1784 | self->detached = 0; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1785 | |
| 1786 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedReader", kwlist, |
| 1787 | &raw, &buffer_size, &max_buffer_size)) { |
| 1788 | return -1; |
| 1789 | } |
| 1790 | |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 1791 | if (max_buffer_size != -234 && !complain_about_max_buffer_size()) |
| 1792 | return -1; |
| 1793 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1794 | if (_PyIOBase_check_writable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1795 | return -1; |
| 1796 | |
| 1797 | Py_CLEAR(self->raw); |
| 1798 | Py_INCREF(raw); |
| 1799 | self->raw = raw; |
| 1800 | self->readable = 0; |
| 1801 | self->writable = 1; |
| 1802 | |
| 1803 | self->buffer_size = buffer_size; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1804 | if (_buffered_init(self) < 0) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1805 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1806 | _bufferedwriter_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1807 | self->pos = 0; |
| 1808 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1809 | self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedWriter_Type && |
| 1810 | Py_TYPE(raw) == &PyFileIO_Type); |
| 1811 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1812 | self->ok = 1; |
| 1813 | return 0; |
| 1814 | } |
| 1815 | |
| 1816 | static Py_ssize_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1817 | _bufferedwriter_raw_write(buffered *self, char *start, Py_ssize_t len) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1818 | { |
| 1819 | Py_buffer buf; |
| 1820 | PyObject *memobj, *res; |
| 1821 | Py_ssize_t n; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1822 | int errnum; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1823 | /* NOTE: the buffer needn't be released as its object is NULL. */ |
| 1824 | if (PyBuffer_FillInfo(&buf, NULL, start, len, 1, PyBUF_CONTIG_RO) == -1) |
| 1825 | return -1; |
| 1826 | memobj = PyMemoryView_FromBuffer(&buf); |
| 1827 | if (memobj == NULL) |
| 1828 | return -1; |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 1829 | /* NOTE: PyErr_SetFromErrno() calls PyErr_CheckSignals() when EINTR |
| 1830 | occurs so we needn't do it ourselves. |
| 1831 | We then retry writing, ignoring the signal if no handler has |
| 1832 | raised (see issue #10956). |
| 1833 | */ |
| 1834 | do { |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1835 | errno = 0; |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 1836 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_write, memobj, NULL); |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1837 | errnum = errno; |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 1838 | } while (res == NULL && _trap_eintr()); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1839 | Py_DECREF(memobj); |
| 1840 | if (res == NULL) |
| 1841 | return -1; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1842 | if (res == Py_None) { |
| 1843 | /* Non-blocking stream would have blocked. Special return code! |
| 1844 | Being paranoid we reset errno in case it is changed by code |
| 1845 | triggered by a decref. errno is used by _set_BlockingIOError(). */ |
| 1846 | Py_DECREF(res); |
| 1847 | errno = errnum; |
| 1848 | return -2; |
| 1849 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1850 | n = PyNumber_AsSsize_t(res, PyExc_ValueError); |
| 1851 | Py_DECREF(res); |
| 1852 | if (n < 0 || n > len) { |
| 1853 | PyErr_Format(PyExc_IOError, |
| 1854 | "raw write() returned invalid length %zd " |
| 1855 | "(should have been between 0 and %zd)", n, len); |
| 1856 | return -1; |
| 1857 | } |
| 1858 | if (n > 0 && self->abs_pos != -1) |
| 1859 | self->abs_pos += n; |
| 1860 | return n; |
| 1861 | } |
| 1862 | |
| 1863 | /* `restore_pos` is 1 if we need to restore the raw stream position at |
| 1864 | the end, 0 otherwise. */ |
| 1865 | static PyObject * |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1866 | _bufferedwriter_flush_unlocked(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1867 | { |
| 1868 | Py_ssize_t written = 0; |
| 1869 | Py_off_t n, rewind; |
| 1870 | |
| 1871 | if (!VALID_WRITE_BUFFER(self) || self->write_pos == self->write_end) |
| 1872 | goto end; |
| 1873 | /* First, rewind */ |
| 1874 | rewind = RAW_OFFSET(self) + (self->pos - self->write_pos); |
| 1875 | if (rewind != 0) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1876 | n = _buffered_raw_seek(self, -rewind, 1); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1877 | if (n < 0) { |
| 1878 | goto error; |
| 1879 | } |
| 1880 | self->raw_pos -= rewind; |
| 1881 | } |
| 1882 | while (self->write_pos < self->write_end) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1883 | n = _bufferedwriter_raw_write(self, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1884 | self->buffer + self->write_pos, |
| 1885 | Py_SAFE_DOWNCAST(self->write_end - self->write_pos, |
| 1886 | Py_off_t, Py_ssize_t)); |
| 1887 | if (n == -1) { |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1888 | goto error; |
| 1889 | } |
| 1890 | else if (n == -2) { |
| 1891 | _set_BlockingIOError("write could not complete without blocking", |
| 1892 | 0); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1893 | goto error; |
| 1894 | } |
| 1895 | self->write_pos += n; |
| 1896 | self->raw_pos = self->write_pos; |
| 1897 | written += Py_SAFE_DOWNCAST(n, Py_off_t, Py_ssize_t); |
Antoine Pitrou | b46b9d5 | 2010-08-21 19:09:32 +0000 | [diff] [blame] | 1898 | /* Partial writes can return successfully when interrupted by a |
| 1899 | signal (see write(2)). We must run signal handlers before |
| 1900 | blocking another time, possibly indefinitely. */ |
| 1901 | if (PyErr_CheckSignals() < 0) |
| 1902 | goto error; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1903 | } |
| 1904 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1905 | _bufferedwriter_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1906 | |
| 1907 | end: |
| 1908 | Py_RETURN_NONE; |
| 1909 | |
| 1910 | error: |
| 1911 | return NULL; |
| 1912 | } |
| 1913 | |
| 1914 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1915 | bufferedwriter_write(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1916 | { |
| 1917 | PyObject *res = NULL; |
| 1918 | Py_buffer buf; |
Amaury Forgeot d'Arc | e1b60d4 | 2009-10-05 21:09:00 +0000 | [diff] [blame] | 1919 | Py_ssize_t written, avail, remaining; |
| 1920 | Py_off_t offset; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1921 | |
| 1922 | CHECK_INITIALIZED(self) |
| 1923 | if (!PyArg_ParseTuple(args, "y*:write", &buf)) { |
| 1924 | return NULL; |
| 1925 | } |
| 1926 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1927 | if (IS_CLOSED(self)) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1928 | PyErr_SetString(PyExc_ValueError, "write to closed file"); |
| 1929 | PyBuffer_Release(&buf); |
| 1930 | return NULL; |
| 1931 | } |
| 1932 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 1933 | if (!ENTER_BUFFERED(self)) { |
| 1934 | PyBuffer_Release(&buf); |
| 1935 | return NULL; |
| 1936 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1937 | |
| 1938 | /* Fast path: the data to write can be fully buffered. */ |
| 1939 | if (!VALID_READ_BUFFER(self) && !VALID_WRITE_BUFFER(self)) { |
| 1940 | self->pos = 0; |
| 1941 | self->raw_pos = 0; |
| 1942 | } |
| 1943 | avail = Py_SAFE_DOWNCAST(self->buffer_size - self->pos, Py_off_t, Py_ssize_t); |
| 1944 | if (buf.len <= avail) { |
| 1945 | memcpy(self->buffer + self->pos, buf.buf, buf.len); |
Antoine Pitrou | 7c40489 | 2011-05-13 00:13:33 +0200 | [diff] [blame] | 1946 | if (!VALID_WRITE_BUFFER(self) || self->write_pos > self->pos) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1947 | self->write_pos = self->pos; |
| 1948 | } |
| 1949 | ADJUST_POSITION(self, self->pos + buf.len); |
| 1950 | if (self->pos > self->write_end) |
| 1951 | self->write_end = self->pos; |
| 1952 | written = buf.len; |
| 1953 | goto end; |
| 1954 | } |
| 1955 | |
| 1956 | /* First write the current buffer */ |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1957 | res = _bufferedwriter_flush_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1958 | if (res == NULL) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1959 | Py_ssize_t *w = _buffered_check_blocking_error(); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1960 | if (w == NULL) |
| 1961 | goto error; |
| 1962 | if (self->readable) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1963 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1964 | /* Make some place by shifting the buffer. */ |
| 1965 | assert(VALID_WRITE_BUFFER(self)); |
| 1966 | memmove(self->buffer, self->buffer + self->write_pos, |
| 1967 | Py_SAFE_DOWNCAST(self->write_end - self->write_pos, |
| 1968 | Py_off_t, Py_ssize_t)); |
| 1969 | self->write_end -= self->write_pos; |
| 1970 | self->raw_pos -= self->write_pos; |
| 1971 | self->pos -= self->write_pos; |
| 1972 | self->write_pos = 0; |
| 1973 | avail = Py_SAFE_DOWNCAST(self->buffer_size - self->write_end, |
| 1974 | Py_off_t, Py_ssize_t); |
| 1975 | if (buf.len <= avail) { |
| 1976 | /* Everything can be buffered */ |
| 1977 | PyErr_Clear(); |
| 1978 | memcpy(self->buffer + self->write_end, buf.buf, buf.len); |
| 1979 | self->write_end += buf.len; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1980 | self->pos += buf.len; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1981 | written = buf.len; |
| 1982 | goto end; |
| 1983 | } |
| 1984 | /* Buffer as much as possible. */ |
| 1985 | memcpy(self->buffer + self->write_end, buf.buf, avail); |
| 1986 | self->write_end += avail; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1987 | self->pos += avail; |
| 1988 | /* XXX Modifying the existing exception e using the pointer w |
| 1989 | will change e.characters_written but not e.args[2]. |
| 1990 | Therefore we just replace with a new error. */ |
| 1991 | _set_BlockingIOError("write could not complete without blocking", |
| 1992 | avail); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1993 | goto error; |
| 1994 | } |
| 1995 | Py_CLEAR(res); |
| 1996 | |
Antoine Pitrou | a0ceb73 | 2009-08-06 20:29:56 +0000 | [diff] [blame] | 1997 | /* Adjust the raw stream position if it is away from the logical stream |
| 1998 | position. This happens if the read buffer has been filled but not |
| 1999 | modified (and therefore _bufferedwriter_flush_unlocked() didn't rewind |
| 2000 | the raw stream by itself). |
| 2001 | Fixes issue #6629. |
| 2002 | */ |
Amaury Forgeot d'Arc | e1b60d4 | 2009-10-05 21:09:00 +0000 | [diff] [blame] | 2003 | offset = RAW_OFFSET(self); |
| 2004 | if (offset != 0) { |
| 2005 | if (_buffered_raw_seek(self, -offset, 1) < 0) |
Antoine Pitrou | a0ceb73 | 2009-08-06 20:29:56 +0000 | [diff] [blame] | 2006 | goto error; |
Amaury Forgeot d'Arc | e1b60d4 | 2009-10-05 21:09:00 +0000 | [diff] [blame] | 2007 | self->raw_pos -= offset; |
Antoine Pitrou | a0ceb73 | 2009-08-06 20:29:56 +0000 | [diff] [blame] | 2008 | } |
| 2009 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2010 | /* Then write buf itself. At this point the buffer has been emptied. */ |
| 2011 | remaining = buf.len; |
| 2012 | written = 0; |
| 2013 | while (remaining > self->buffer_size) { |
Amaury Forgeot d'Arc | e1b60d4 | 2009-10-05 21:09:00 +0000 | [diff] [blame] | 2014 | Py_ssize_t n = _bufferedwriter_raw_write( |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2015 | self, (char *) buf.buf + written, buf.len - written); |
| 2016 | if (n == -1) { |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 2017 | goto error; |
| 2018 | } else if (n == -2) { |
| 2019 | /* Write failed because raw file is non-blocking */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2020 | if (remaining > self->buffer_size) { |
| 2021 | /* Can't buffer everything, still buffer as much as possible */ |
| 2022 | memcpy(self->buffer, |
| 2023 | (char *) buf.buf + written, self->buffer_size); |
| 2024 | self->raw_pos = 0; |
| 2025 | ADJUST_POSITION(self, self->buffer_size); |
| 2026 | self->write_end = self->buffer_size; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 2027 | written += self->buffer_size; |
| 2028 | _set_BlockingIOError("write could not complete without " |
| 2029 | "blocking", written); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2030 | goto error; |
| 2031 | } |
| 2032 | PyErr_Clear(); |
| 2033 | break; |
| 2034 | } |
| 2035 | written += n; |
| 2036 | remaining -= n; |
Antoine Pitrou | b46b9d5 | 2010-08-21 19:09:32 +0000 | [diff] [blame] | 2037 | /* Partial writes can return successfully when interrupted by a |
| 2038 | signal (see write(2)). We must run signal handlers before |
| 2039 | blocking another time, possibly indefinitely. */ |
| 2040 | if (PyErr_CheckSignals() < 0) |
| 2041 | goto error; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2042 | } |
| 2043 | if (self->readable) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2044 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2045 | if (remaining > 0) { |
| 2046 | memcpy(self->buffer, (char *) buf.buf + written, remaining); |
| 2047 | written += remaining; |
| 2048 | } |
| 2049 | self->write_pos = 0; |
| 2050 | /* TODO: sanity check (remaining >= 0) */ |
| 2051 | self->write_end = remaining; |
| 2052 | ADJUST_POSITION(self, remaining); |
| 2053 | self->raw_pos = 0; |
| 2054 | |
| 2055 | end: |
| 2056 | res = PyLong_FromSsize_t(written); |
| 2057 | |
| 2058 | error: |
| 2059 | LEAVE_BUFFERED(self) |
| 2060 | PyBuffer_Release(&buf); |
| 2061 | return res; |
| 2062 | } |
| 2063 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2064 | static PyMethodDef bufferedwriter_methods[] = { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2065 | /* BufferedIOMixin methods */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2066 | {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| 2067 | {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| 2068 | {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| 2069 | {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| 2070 | {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| 2071 | {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| 2072 | {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 2073 | {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 2074 | {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2075 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2076 | {"write", (PyCFunction)bufferedwriter_write, METH_VARARGS}, |
| 2077 | {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
| 2078 | {"flush", (PyCFunction)buffered_flush, METH_NOARGS}, |
| 2079 | {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| 2080 | {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2081 | {NULL, NULL} |
| 2082 | }; |
| 2083 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2084 | static PyMemberDef bufferedwriter_members[] = { |
Antoine Pitrou | 7f8f418 | 2010-12-21 21:20:59 +0000 | [diff] [blame] | 2085 | {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2086 | {NULL} |
| 2087 | }; |
| 2088 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2089 | static PyGetSetDef bufferedwriter_getset[] = { |
| 2090 | {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| 2091 | {"name", (getter)buffered_name_get, NULL, NULL}, |
| 2092 | {"mode", (getter)buffered_mode_get, NULL, NULL}, |
Benjamin Peterson | 1fea321 | 2009-04-19 03:15:20 +0000 | [diff] [blame] | 2093 | {NULL} |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2094 | }; |
| 2095 | |
| 2096 | |
| 2097 | PyTypeObject PyBufferedWriter_Type = { |
| 2098 | PyVarObject_HEAD_INIT(NULL, 0) |
| 2099 | "_io.BufferedWriter", /*tp_name*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2100 | sizeof(buffered), /*tp_basicsize*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2101 | 0, /*tp_itemsize*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2102 | (destructor)buffered_dealloc, /*tp_dealloc*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2103 | 0, /*tp_print*/ |
| 2104 | 0, /*tp_getattr*/ |
| 2105 | 0, /*tp_setattr*/ |
| 2106 | 0, /*tp_compare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2107 | (reprfunc)buffered_repr, /*tp_repr*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2108 | 0, /*tp_as_number*/ |
| 2109 | 0, /*tp_as_sequence*/ |
| 2110 | 0, /*tp_as_mapping*/ |
| 2111 | 0, /*tp_hash */ |
| 2112 | 0, /*tp_call*/ |
| 2113 | 0, /*tp_str*/ |
| 2114 | 0, /*tp_getattro*/ |
| 2115 | 0, /*tp_setattro*/ |
| 2116 | 0, /*tp_as_buffer*/ |
| 2117 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| 2118 | | Py_TPFLAGS_HAVE_GC, /*tp_flags*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2119 | bufferedwriter_doc, /* tp_doc */ |
| 2120 | (traverseproc)buffered_traverse, /* tp_traverse */ |
| 2121 | (inquiry)buffered_clear, /* tp_clear */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2122 | 0, /* tp_richcompare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2123 | offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2124 | 0, /* tp_iter */ |
| 2125 | 0, /* tp_iternext */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2126 | bufferedwriter_methods, /* tp_methods */ |
| 2127 | bufferedwriter_members, /* tp_members */ |
| 2128 | bufferedwriter_getset, /* tp_getset */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2129 | 0, /* tp_base */ |
| 2130 | 0, /* tp_dict */ |
| 2131 | 0, /* tp_descr_get */ |
| 2132 | 0, /* tp_descr_set */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2133 | offsetof(buffered, dict), /* tp_dictoffset */ |
| 2134 | (initproc)bufferedwriter_init, /* tp_init */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2135 | 0, /* tp_alloc */ |
| 2136 | PyType_GenericNew, /* tp_new */ |
| 2137 | }; |
| 2138 | |
| 2139 | |
| 2140 | |
| 2141 | /* |
| 2142 | * BufferedRWPair |
| 2143 | */ |
| 2144 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2145 | PyDoc_STRVAR(bufferedrwpair_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2146 | "A buffered reader and writer object together.\n" |
| 2147 | "\n" |
| 2148 | "A buffered reader object and buffered writer object put together to\n" |
| 2149 | "form a sequential IO object that can read and write. This is typically\n" |
| 2150 | "used with a socket or two-way pipe.\n" |
| 2151 | "\n" |
| 2152 | "reader and writer are RawIOBase objects that are readable and\n" |
| 2153 | "writeable respectively. If the buffer_size is omitted it defaults to\n" |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 2154 | "DEFAULT_BUFFER_SIZE.\n" |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2155 | ); |
| 2156 | |
| 2157 | /* XXX The usefulness of this (compared to having two separate IO objects) is |
| 2158 | * questionable. |
| 2159 | */ |
| 2160 | |
| 2161 | typedef struct { |
| 2162 | PyObject_HEAD |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2163 | buffered *reader; |
| 2164 | buffered *writer; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2165 | PyObject *dict; |
| 2166 | PyObject *weakreflist; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2167 | } rwpair; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2168 | |
| 2169 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2170 | bufferedrwpair_init(rwpair *self, PyObject *args, PyObject *kwds) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2171 | { |
| 2172 | PyObject *reader, *writer; |
| 2173 | Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 2174 | Py_ssize_t max_buffer_size = -234; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2175 | |
| 2176 | if (!PyArg_ParseTuple(args, "OO|nn:BufferedRWPair", &reader, &writer, |
| 2177 | &buffer_size, &max_buffer_size)) { |
| 2178 | return -1; |
| 2179 | } |
| 2180 | |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 2181 | if (max_buffer_size != -234 && !complain_about_max_buffer_size()) |
| 2182 | return -1; |
| 2183 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2184 | if (_PyIOBase_check_readable(reader, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2185 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2186 | if (_PyIOBase_check_writable(writer, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2187 | return -1; |
| 2188 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2189 | self->reader = (buffered *) PyObject_CallFunction( |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2190 | (PyObject *) &PyBufferedReader_Type, "On", reader, buffer_size); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2191 | if (self->reader == NULL) |
| 2192 | return -1; |
| 2193 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2194 | self->writer = (buffered *) PyObject_CallFunction( |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2195 | (PyObject *) &PyBufferedWriter_Type, "On", writer, buffer_size); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2196 | if (self->writer == NULL) { |
| 2197 | Py_CLEAR(self->reader); |
| 2198 | return -1; |
| 2199 | } |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2200 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2201 | return 0; |
| 2202 | } |
| 2203 | |
| 2204 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2205 | bufferedrwpair_traverse(rwpair *self, visitproc visit, void *arg) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2206 | { |
| 2207 | Py_VISIT(self->dict); |
| 2208 | return 0; |
| 2209 | } |
| 2210 | |
| 2211 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2212 | bufferedrwpair_clear(rwpair *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2213 | { |
| 2214 | Py_CLEAR(self->reader); |
| 2215 | Py_CLEAR(self->writer); |
| 2216 | Py_CLEAR(self->dict); |
| 2217 | return 0; |
| 2218 | } |
| 2219 | |
| 2220 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2221 | bufferedrwpair_dealloc(rwpair *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2222 | { |
| 2223 | _PyObject_GC_UNTRACK(self); |
| 2224 | Py_CLEAR(self->reader); |
| 2225 | Py_CLEAR(self->writer); |
| 2226 | Py_CLEAR(self->dict); |
| 2227 | Py_TYPE(self)->tp_free((PyObject *) self); |
| 2228 | } |
| 2229 | |
| 2230 | static PyObject * |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2231 | _forward_call(buffered *self, _Py_Identifier *name, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2232 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2233 | PyObject *func = _PyObject_GetAttrId((PyObject *)self, name); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2234 | PyObject *ret; |
| 2235 | |
| 2236 | if (func == NULL) { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2237 | PyErr_SetString(PyExc_AttributeError, name->string); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2238 | return NULL; |
| 2239 | } |
| 2240 | |
| 2241 | ret = PyObject_CallObject(func, args); |
| 2242 | Py_DECREF(func); |
| 2243 | return ret; |
| 2244 | } |
| 2245 | |
| 2246 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2247 | bufferedrwpair_read(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2248 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2249 | return _forward_call(self->reader, &PyId_read, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2250 | } |
| 2251 | |
| 2252 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2253 | bufferedrwpair_peek(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2254 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2255 | return _forward_call(self->reader, &PyId_peek, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2256 | } |
| 2257 | |
| 2258 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2259 | bufferedrwpair_read1(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2260 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2261 | return _forward_call(self->reader, &PyId_read1, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2262 | } |
| 2263 | |
| 2264 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2265 | bufferedrwpair_readinto(rwpair *self, PyObject *args) |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2266 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2267 | return _forward_call(self->reader, &PyId_readinto, args); |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2268 | } |
| 2269 | |
| 2270 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2271 | bufferedrwpair_write(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2272 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2273 | return _forward_call(self->writer, &PyId_write, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2274 | } |
| 2275 | |
| 2276 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2277 | bufferedrwpair_flush(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2278 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2279 | return _forward_call(self->writer, &PyId_flush, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2280 | } |
| 2281 | |
| 2282 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2283 | bufferedrwpair_readable(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2284 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2285 | return _forward_call(self->reader, &PyId_readable, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2286 | } |
| 2287 | |
| 2288 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2289 | bufferedrwpair_writable(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2290 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2291 | return _forward_call(self->writer, &PyId_writable, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2292 | } |
| 2293 | |
| 2294 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2295 | bufferedrwpair_close(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2296 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2297 | PyObject *ret = _forward_call(self->writer, &PyId_close, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2298 | if (ret == NULL) |
| 2299 | return NULL; |
| 2300 | Py_DECREF(ret); |
| 2301 | |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2302 | return _forward_call(self->reader, &PyId_close, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2303 | } |
| 2304 | |
| 2305 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2306 | bufferedrwpair_isatty(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2307 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2308 | PyObject *ret = _forward_call(self->writer, &PyId_isatty, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2309 | |
| 2310 | if (ret != Py_False) { |
| 2311 | /* either True or exception */ |
| 2312 | return ret; |
| 2313 | } |
| 2314 | Py_DECREF(ret); |
| 2315 | |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2316 | return _forward_call(self->reader, &PyId_isatty, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2317 | } |
| 2318 | |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2319 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2320 | bufferedrwpair_closed_get(rwpair *self, void *context) |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2321 | { |
Charles-François Natali | 42c28cd | 2011-10-05 19:53:43 +0200 | [diff] [blame] | 2322 | if (self->writer == NULL) { |
| 2323 | PyErr_SetString(PyExc_RuntimeError, |
| 2324 | "the BufferedRWPair object is being garbage-collected"); |
| 2325 | return NULL; |
| 2326 | } |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2327 | return PyObject_GetAttr((PyObject *) self->writer, _PyIO_str_closed); |
| 2328 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2329 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2330 | static PyMethodDef bufferedrwpair_methods[] = { |
| 2331 | {"read", (PyCFunction)bufferedrwpair_read, METH_VARARGS}, |
| 2332 | {"peek", (PyCFunction)bufferedrwpair_peek, METH_VARARGS}, |
| 2333 | {"read1", (PyCFunction)bufferedrwpair_read1, METH_VARARGS}, |
| 2334 | {"readinto", (PyCFunction)bufferedrwpair_readinto, METH_VARARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2335 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2336 | {"write", (PyCFunction)bufferedrwpair_write, METH_VARARGS}, |
| 2337 | {"flush", (PyCFunction)bufferedrwpair_flush, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2338 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2339 | {"readable", (PyCFunction)bufferedrwpair_readable, METH_NOARGS}, |
| 2340 | {"writable", (PyCFunction)bufferedrwpair_writable, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2341 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2342 | {"close", (PyCFunction)bufferedrwpair_close, METH_NOARGS}, |
| 2343 | {"isatty", (PyCFunction)bufferedrwpair_isatty, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2344 | |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 2345 | {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
| 2346 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2347 | {NULL, NULL} |
| 2348 | }; |
| 2349 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2350 | static PyGetSetDef bufferedrwpair_getset[] = { |
| 2351 | {"closed", (getter)bufferedrwpair_closed_get, NULL, NULL}, |
Benjamin Peterson | 1fea321 | 2009-04-19 03:15:20 +0000 | [diff] [blame] | 2352 | {NULL} |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2353 | }; |
| 2354 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2355 | PyTypeObject PyBufferedRWPair_Type = { |
| 2356 | PyVarObject_HEAD_INIT(NULL, 0) |
| 2357 | "_io.BufferedRWPair", /*tp_name*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2358 | sizeof(rwpair), /*tp_basicsize*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2359 | 0, /*tp_itemsize*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2360 | (destructor)bufferedrwpair_dealloc, /*tp_dealloc*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2361 | 0, /*tp_print*/ |
| 2362 | 0, /*tp_getattr*/ |
| 2363 | 0, /*tp_setattr*/ |
| 2364 | 0, /*tp_compare */ |
| 2365 | 0, /*tp_repr*/ |
| 2366 | 0, /*tp_as_number*/ |
| 2367 | 0, /*tp_as_sequence*/ |
| 2368 | 0, /*tp_as_mapping*/ |
| 2369 | 0, /*tp_hash */ |
| 2370 | 0, /*tp_call*/ |
| 2371 | 0, /*tp_str*/ |
| 2372 | 0, /*tp_getattro*/ |
| 2373 | 0, /*tp_setattro*/ |
| 2374 | 0, /*tp_as_buffer*/ |
| 2375 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| 2376 | | Py_TPFLAGS_HAVE_GC, /* tp_flags */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2377 | bufferedrwpair_doc, /* tp_doc */ |
| 2378 | (traverseproc)bufferedrwpair_traverse, /* tp_traverse */ |
| 2379 | (inquiry)bufferedrwpair_clear, /* tp_clear */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2380 | 0, /* tp_richcompare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2381 | offsetof(rwpair, weakreflist), /*tp_weaklistoffset*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2382 | 0, /* tp_iter */ |
| 2383 | 0, /* tp_iternext */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2384 | bufferedrwpair_methods, /* tp_methods */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2385 | 0, /* tp_members */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2386 | bufferedrwpair_getset, /* tp_getset */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2387 | 0, /* tp_base */ |
| 2388 | 0, /* tp_dict */ |
| 2389 | 0, /* tp_descr_get */ |
| 2390 | 0, /* tp_descr_set */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2391 | offsetof(rwpair, dict), /* tp_dictoffset */ |
| 2392 | (initproc)bufferedrwpair_init, /* tp_init */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2393 | 0, /* tp_alloc */ |
| 2394 | PyType_GenericNew, /* tp_new */ |
| 2395 | }; |
| 2396 | |
| 2397 | |
| 2398 | |
| 2399 | /* |
| 2400 | * BufferedRandom |
| 2401 | */ |
| 2402 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2403 | PyDoc_STRVAR(bufferedrandom_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2404 | "A buffered interface to random access streams.\n" |
| 2405 | "\n" |
| 2406 | "The constructor creates a reader and writer for a seekable stream,\n" |
| 2407 | "raw, given in the first argument. If the buffer_size is omitted it\n" |
| 2408 | "defaults to DEFAULT_BUFFER_SIZE. max_buffer_size isn't used anymore.\n" |
| 2409 | ); |
| 2410 | |
| 2411 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2412 | bufferedrandom_init(buffered *self, PyObject *args, PyObject *kwds) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2413 | { |
| 2414 | char *kwlist[] = {"raw", "buffer_size", "max_buffer_size", NULL}; |
| 2415 | Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 2416 | Py_ssize_t max_buffer_size = -234; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2417 | PyObject *raw; |
| 2418 | |
| 2419 | self->ok = 0; |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 2420 | self->detached = 0; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2421 | |
| 2422 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedReader", kwlist, |
| 2423 | &raw, &buffer_size, &max_buffer_size)) { |
| 2424 | return -1; |
| 2425 | } |
| 2426 | |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 2427 | if (max_buffer_size != -234 && !complain_about_max_buffer_size()) |
| 2428 | return -1; |
| 2429 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2430 | if (_PyIOBase_check_seekable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2431 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2432 | if (_PyIOBase_check_readable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2433 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2434 | if (_PyIOBase_check_writable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2435 | return -1; |
| 2436 | |
| 2437 | Py_CLEAR(self->raw); |
| 2438 | Py_INCREF(raw); |
| 2439 | self->raw = raw; |
| 2440 | self->buffer_size = buffer_size; |
| 2441 | self->readable = 1; |
| 2442 | self->writable = 1; |
| 2443 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2444 | if (_buffered_init(self) < 0) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2445 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2446 | _bufferedreader_reset_buf(self); |
| 2447 | _bufferedwriter_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2448 | self->pos = 0; |
| 2449 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 2450 | self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedRandom_Type && |
| 2451 | Py_TYPE(raw) == &PyFileIO_Type); |
| 2452 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2453 | self->ok = 1; |
| 2454 | return 0; |
| 2455 | } |
| 2456 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2457 | static PyMethodDef bufferedrandom_methods[] = { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2458 | /* BufferedIOMixin methods */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2459 | {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| 2460 | {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| 2461 | {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| 2462 | {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| 2463 | {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| 2464 | {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| 2465 | {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 2466 | {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 2467 | {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2468 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2469 | {"flush", (PyCFunction)buffered_flush, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2470 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2471 | {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| 2472 | {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
| 2473 | {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
| 2474 | {"read", (PyCFunction)buffered_read, METH_VARARGS}, |
| 2475 | {"read1", (PyCFunction)buffered_read1, METH_VARARGS}, |
| 2476 | {"readinto", (PyCFunction)buffered_readinto, METH_VARARGS}, |
| 2477 | {"readline", (PyCFunction)buffered_readline, METH_VARARGS}, |
| 2478 | {"peek", (PyCFunction)buffered_peek, METH_VARARGS}, |
| 2479 | {"write", (PyCFunction)bufferedwriter_write, METH_VARARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2480 | {NULL, NULL} |
| 2481 | }; |
| 2482 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2483 | static PyMemberDef bufferedrandom_members[] = { |
Antoine Pitrou | 7f8f418 | 2010-12-21 21:20:59 +0000 | [diff] [blame] | 2484 | {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2485 | {NULL} |
| 2486 | }; |
| 2487 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2488 | static PyGetSetDef bufferedrandom_getset[] = { |
| 2489 | {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| 2490 | {"name", (getter)buffered_name_get, NULL, NULL}, |
| 2491 | {"mode", (getter)buffered_mode_get, NULL, NULL}, |
Benjamin Peterson | 1fea321 | 2009-04-19 03:15:20 +0000 | [diff] [blame] | 2492 | {NULL} |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2493 | }; |
| 2494 | |
| 2495 | |
| 2496 | PyTypeObject PyBufferedRandom_Type = { |
| 2497 | PyVarObject_HEAD_INIT(NULL, 0) |
| 2498 | "_io.BufferedRandom", /*tp_name*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2499 | sizeof(buffered), /*tp_basicsize*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2500 | 0, /*tp_itemsize*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2501 | (destructor)buffered_dealloc, /*tp_dealloc*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2502 | 0, /*tp_print*/ |
| 2503 | 0, /*tp_getattr*/ |
| 2504 | 0, /*tp_setattr*/ |
| 2505 | 0, /*tp_compare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2506 | (reprfunc)buffered_repr, /*tp_repr*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2507 | 0, /*tp_as_number*/ |
| 2508 | 0, /*tp_as_sequence*/ |
| 2509 | 0, /*tp_as_mapping*/ |
| 2510 | 0, /*tp_hash */ |
| 2511 | 0, /*tp_call*/ |
| 2512 | 0, /*tp_str*/ |
| 2513 | 0, /*tp_getattro*/ |
| 2514 | 0, /*tp_setattro*/ |
| 2515 | 0, /*tp_as_buffer*/ |
| 2516 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| 2517 | | Py_TPFLAGS_HAVE_GC, /*tp_flags*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2518 | bufferedrandom_doc, /* tp_doc */ |
| 2519 | (traverseproc)buffered_traverse, /* tp_traverse */ |
| 2520 | (inquiry)buffered_clear, /* tp_clear */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2521 | 0, /* tp_richcompare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2522 | offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2523 | 0, /* tp_iter */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2524 | (iternextfunc)buffered_iternext, /* tp_iternext */ |
| 2525 | bufferedrandom_methods, /* tp_methods */ |
| 2526 | bufferedrandom_members, /* tp_members */ |
| 2527 | bufferedrandom_getset, /* tp_getset */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2528 | 0, /* tp_base */ |
| 2529 | 0, /*tp_dict*/ |
| 2530 | 0, /* tp_descr_get */ |
| 2531 | 0, /* tp_descr_set */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2532 | offsetof(buffered, dict), /*tp_dictoffset*/ |
| 2533 | (initproc)bufferedrandom_init, /* tp_init */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2534 | 0, /* tp_alloc */ |
| 2535 | PyType_GenericNew, /* tp_new */ |
| 2536 | }; |