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); |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 27 | _Py_IDENTIFIER(readinto1); |
Martin v. Löwis | bd928fe | 2011-10-14 10:20:37 +0200 | [diff] [blame] | 28 | _Py_IDENTIFIER(writable); |
| 29 | _Py_IDENTIFIER(write); |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 30 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 31 | /* |
| 32 | * BufferedIOBase class, inherits from IOBase. |
| 33 | */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 34 | PyDoc_STRVAR(bufferediobase_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 35 | "Base class for buffered IO objects.\n" |
| 36 | "\n" |
| 37 | "The main difference with RawIOBase is that the read() method\n" |
| 38 | "supports omitting the size argument, and does not have a default\n" |
| 39 | "implementation that defers to readinto().\n" |
| 40 | "\n" |
| 41 | "In addition, read(), readinto() and write() may raise\n" |
| 42 | "BlockingIOError if the underlying raw stream is in non-blocking\n" |
| 43 | "mode and not ready; unlike their raw counterparts, they will never\n" |
| 44 | "return None.\n" |
| 45 | "\n" |
| 46 | "A typical implementation should not inherit from a RawIOBase\n" |
| 47 | "implementation, but wrap one.\n" |
| 48 | ); |
| 49 | |
| 50 | static PyObject * |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 51 | _bufferediobase_readinto_generic(PyObject *self, PyObject *args, char readinto1) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 52 | { |
| 53 | Py_buffer buf; |
| 54 | Py_ssize_t len; |
| 55 | PyObject *data; |
| 56 | |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 57 | if (!PyArg_ParseTuple(args, |
| 58 | readinto1 ? "w*:readinto1" : "w*:readinto", |
| 59 | &buf)) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 60 | return NULL; |
| 61 | } |
| 62 | |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 63 | data = _PyObject_CallMethodId(self, |
| 64 | readinto1 ? &PyId_read1 : &PyId_read, |
| 65 | "n", buf.len); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 66 | if (data == NULL) |
| 67 | goto error; |
| 68 | |
| 69 | if (!PyBytes_Check(data)) { |
| 70 | Py_DECREF(data); |
| 71 | PyErr_SetString(PyExc_TypeError, "read() should return bytes"); |
| 72 | goto error; |
| 73 | } |
| 74 | |
| 75 | len = Py_SIZE(data); |
Serhiy Storchaka | 37a79a1 | 2013-05-28 16:24:45 +0300 | [diff] [blame] | 76 | if (len > buf.len) { |
| 77 | PyErr_Format(PyExc_ValueError, |
| 78 | "read() returned too much data: " |
| 79 | "%zd bytes requested, %zd returned", |
| 80 | buf.len, len); |
| 81 | Py_DECREF(data); |
| 82 | goto error; |
| 83 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 84 | memcpy(buf.buf, PyBytes_AS_STRING(data), len); |
| 85 | |
| 86 | PyBuffer_Release(&buf); |
| 87 | Py_DECREF(data); |
| 88 | |
| 89 | return PyLong_FromSsize_t(len); |
| 90 | |
| 91 | error: |
| 92 | PyBuffer_Release(&buf); |
| 93 | return NULL; |
| 94 | } |
| 95 | |
| 96 | static PyObject * |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 97 | bufferediobase_readinto(PyObject *self, PyObject *args) |
| 98 | { |
| 99 | return _bufferediobase_readinto_generic(self, args, 0); |
| 100 | } |
| 101 | |
| 102 | static PyObject * |
| 103 | bufferediobase_readinto1(PyObject *self, PyObject *args) |
| 104 | { |
| 105 | return _bufferediobase_readinto_generic(self, args, 1); |
| 106 | } |
| 107 | |
| 108 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 109 | bufferediobase_unsupported(const char *message) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 110 | { |
Antoine Pitrou | 712cb73 | 2013-12-21 15:51:54 +0100 | [diff] [blame] | 111 | _PyIO_State *state = IO_STATE(); |
| 112 | if (state != NULL) |
| 113 | PyErr_SetString(state->unsupported_operation, message); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 114 | return NULL; |
| 115 | } |
| 116 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 117 | PyDoc_STRVAR(bufferediobase_detach_doc, |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 118 | "Disconnect this buffer from its underlying raw stream and return it.\n" |
| 119 | "\n" |
| 120 | "After the raw stream has been detached, the buffer is in an unusable\n" |
| 121 | "state.\n"); |
| 122 | |
| 123 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 124 | bufferediobase_detach(PyObject *self) |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 125 | { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 126 | return bufferediobase_unsupported("detach"); |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 127 | } |
| 128 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 129 | PyDoc_STRVAR(bufferediobase_read_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 130 | "Read and return up to n bytes.\n" |
| 131 | "\n" |
| 132 | "If the argument is omitted, None, or negative, reads and\n" |
| 133 | "returns all data until EOF.\n" |
| 134 | "\n" |
| 135 | "If the argument is positive, and the underlying raw stream is\n" |
| 136 | "not 'interactive', multiple raw reads may be issued to satisfy\n" |
| 137 | "the byte count (unless EOF is reached first). But for\n" |
| 138 | "interactive raw streams (as well as sockets and pipes), at most\n" |
| 139 | "one raw read will be issued, and a short result does not imply\n" |
| 140 | "that EOF is imminent.\n" |
| 141 | "\n" |
| 142 | "Returns an empty bytes object on EOF.\n" |
| 143 | "\n" |
| 144 | "Returns None if the underlying raw stream was open in non-blocking\n" |
| 145 | "mode and no data is available at the moment.\n"); |
| 146 | |
| 147 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 148 | bufferediobase_read(PyObject *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 149 | { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 150 | return bufferediobase_unsupported("read"); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 151 | } |
| 152 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 153 | PyDoc_STRVAR(bufferediobase_read1_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 154 | "Read and return up to n bytes, with at most one read() call\n" |
| 155 | "to the underlying raw stream. A short result does not imply\n" |
| 156 | "that EOF is imminent.\n" |
| 157 | "\n" |
| 158 | "Returns an empty bytes object on EOF.\n"); |
| 159 | |
| 160 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 161 | bufferediobase_read1(PyObject *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 162 | { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 163 | return bufferediobase_unsupported("read1"); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 164 | } |
| 165 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 166 | PyDoc_STRVAR(bufferediobase_write_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 167 | "Write the given buffer to the IO stream.\n" |
| 168 | "\n" |
| 169 | "Returns the number of bytes written, which is never less than\n" |
| 170 | "len(b).\n" |
| 171 | "\n" |
| 172 | "Raises BlockingIOError if the buffer is full and the\n" |
| 173 | "underlying raw stream cannot accept more data at the moment.\n"); |
| 174 | |
| 175 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 176 | bufferediobase_write(PyObject *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 177 | { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 178 | return bufferediobase_unsupported("write"); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 182 | static PyMethodDef bufferediobase_methods[] = { |
| 183 | {"detach", (PyCFunction)bufferediobase_detach, METH_NOARGS, bufferediobase_detach_doc}, |
| 184 | {"read", bufferediobase_read, METH_VARARGS, bufferediobase_read_doc}, |
| 185 | {"read1", bufferediobase_read1, METH_VARARGS, bufferediobase_read1_doc}, |
| 186 | {"readinto", bufferediobase_readinto, METH_VARARGS, NULL}, |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 187 | {"readinto1", bufferediobase_readinto1, METH_VARARGS, NULL}, |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 188 | {"write", bufferediobase_write, METH_VARARGS, bufferediobase_write_doc}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 189 | {NULL, NULL} |
| 190 | }; |
| 191 | |
| 192 | PyTypeObject PyBufferedIOBase_Type = { |
| 193 | PyVarObject_HEAD_INIT(NULL, 0) |
| 194 | "_io._BufferedIOBase", /*tp_name*/ |
| 195 | 0, /*tp_basicsize*/ |
| 196 | 0, /*tp_itemsize*/ |
| 197 | 0, /*tp_dealloc*/ |
| 198 | 0, /*tp_print*/ |
| 199 | 0, /*tp_getattr*/ |
| 200 | 0, /*tp_setattr*/ |
| 201 | 0, /*tp_compare */ |
| 202 | 0, /*tp_repr*/ |
| 203 | 0, /*tp_as_number*/ |
| 204 | 0, /*tp_as_sequence*/ |
| 205 | 0, /*tp_as_mapping*/ |
| 206 | 0, /*tp_hash */ |
| 207 | 0, /*tp_call*/ |
| 208 | 0, /*tp_str*/ |
| 209 | 0, /*tp_getattro*/ |
| 210 | 0, /*tp_setattro*/ |
| 211 | 0, /*tp_as_buffer*/ |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 212 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| 213 | | Py_TPFLAGS_HAVE_FINALIZE, /*tp_flags*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 214 | bufferediobase_doc, /* tp_doc */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 215 | 0, /* tp_traverse */ |
| 216 | 0, /* tp_clear */ |
| 217 | 0, /* tp_richcompare */ |
| 218 | 0, /* tp_weaklistoffset */ |
| 219 | 0, /* tp_iter */ |
| 220 | 0, /* tp_iternext */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 221 | bufferediobase_methods, /* tp_methods */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 222 | 0, /* tp_members */ |
| 223 | 0, /* tp_getset */ |
| 224 | &PyIOBase_Type, /* tp_base */ |
| 225 | 0, /* tp_dict */ |
| 226 | 0, /* tp_descr_get */ |
| 227 | 0, /* tp_descr_set */ |
| 228 | 0, /* tp_dictoffset */ |
| 229 | 0, /* tp_init */ |
| 230 | 0, /* tp_alloc */ |
| 231 | 0, /* tp_new */ |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 232 | 0, /* tp_free */ |
| 233 | 0, /* tp_is_gc */ |
| 234 | 0, /* tp_bases */ |
| 235 | 0, /* tp_mro */ |
| 236 | 0, /* tp_cache */ |
| 237 | 0, /* tp_subclasses */ |
| 238 | 0, /* tp_weaklist */ |
| 239 | 0, /* tp_del */ |
| 240 | 0, /* tp_version_tag */ |
| 241 | 0, /* tp_finalize */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 242 | }; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 243 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 244 | |
| 245 | typedef struct { |
| 246 | PyObject_HEAD |
| 247 | |
| 248 | PyObject *raw; |
| 249 | int ok; /* Initialized? */ |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 250 | int detached; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 251 | int readable; |
| 252 | int writable; |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 253 | char finalizing; |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 254 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 255 | /* True if this is a vanilla Buffered object (rather than a user derived |
| 256 | class) *and* the raw stream is a vanilla FileIO object. */ |
| 257 | int fast_closed_checks; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 258 | |
| 259 | /* Absolute position inside the raw stream (-1 if unknown). */ |
| 260 | Py_off_t abs_pos; |
| 261 | |
| 262 | /* A static buffer of size `buffer_size` */ |
| 263 | char *buffer; |
| 264 | /* Current logical position in the buffer. */ |
| 265 | Py_off_t pos; |
| 266 | /* Position of the raw stream in the buffer. */ |
| 267 | Py_off_t raw_pos; |
| 268 | |
| 269 | /* Just after the last buffered byte in the buffer, or -1 if the buffer |
| 270 | isn't ready for reading. */ |
| 271 | Py_off_t read_end; |
| 272 | |
| 273 | /* Just after the last byte actually written */ |
| 274 | Py_off_t write_pos; |
| 275 | /* Just after the last byte waiting to be written, or -1 if the buffer |
| 276 | isn't ready for writing. */ |
| 277 | Py_off_t write_end; |
| 278 | |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 279 | #ifdef WITH_THREAD |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 280 | PyThread_type_lock lock; |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 281 | volatile long owner; |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 282 | #endif |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 283 | |
| 284 | Py_ssize_t buffer_size; |
| 285 | Py_ssize_t buffer_mask; |
| 286 | |
| 287 | PyObject *dict; |
| 288 | PyObject *weakreflist; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 289 | } buffered; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 290 | |
| 291 | /* |
| 292 | Implementation notes: |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 293 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 294 | * BufferedReader, BufferedWriter and BufferedRandom try to share most |
| 295 | methods (this is helped by the members `readable` and `writable`, which |
| 296 | are initialized in the respective constructors) |
| 297 | * They also share a single buffer for reading and writing. This enables |
| 298 | interleaved reads and writes without flushing. It also makes the logic |
| 299 | a bit trickier to get right. |
| 300 | * The absolute position of the raw stream is cached, if possible, in the |
| 301 | `abs_pos` member. It must be updated every time an operation is done |
| 302 | 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] | 303 | _buffered_raw_tell(), which queries the raw stream (_buffered_raw_seek() |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 304 | also does it). To read it, use RAW_TELL(). |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 305 | * Three helpers, _bufferedreader_raw_read, _bufferedwriter_raw_write and |
| 306 | _bufferedwriter_flush_unlocked do a lot of useful housekeeping. |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 307 | |
| 308 | NOTE: we should try to maintain block alignment of reads and writes to the |
| 309 | raw stream (according to the buffer size), but for now it is only done |
| 310 | in read() and friends. |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 311 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 312 | */ |
| 313 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 314 | /* These macros protect the buffered object against concurrent operations. */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 315 | |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 316 | #ifdef WITH_THREAD |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 317 | |
| 318 | static int |
| 319 | _enter_buffered_busy(buffered *self) |
| 320 | { |
Antoine Pitrou | 25f85d4 | 2015-04-13 19:41:47 +0200 | [diff] [blame] | 321 | int relax_locking; |
| 322 | PyLockStatus st; |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 323 | if (self->owner == PyThread_get_thread_ident()) { |
| 324 | PyErr_Format(PyExc_RuntimeError, |
| 325 | "reentrant call inside %R", self); |
| 326 | return 0; |
Antoine Pitrou | 5800b27 | 2009-11-01 12:05:48 +0000 | [diff] [blame] | 327 | } |
Antoine Pitrou | 25f85d4 | 2015-04-13 19:41:47 +0200 | [diff] [blame] | 328 | relax_locking = (_Py_Finalizing != NULL); |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 329 | Py_BEGIN_ALLOW_THREADS |
Antoine Pitrou | 25f85d4 | 2015-04-13 19:41:47 +0200 | [diff] [blame] | 330 | if (!relax_locking) |
| 331 | st = PyThread_acquire_lock(self->lock, 1); |
| 332 | else { |
| 333 | /* When finalizing, we don't want a deadlock to happen with daemon |
| 334 | * threads abruptly shut down while they owned the lock. |
| 335 | * Therefore, only wait for a grace period (1 s.). |
| 336 | * Note that non-daemon threads have already exited here, so this |
| 337 | * shouldn't affect carefully written threaded I/O code. |
| 338 | */ |
| 339 | st = PyThread_acquire_lock_timed(self->lock, 1e6, 0); |
| 340 | } |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 341 | Py_END_ALLOW_THREADS |
Antoine Pitrou | 25f85d4 | 2015-04-13 19:41:47 +0200 | [diff] [blame] | 342 | if (relax_locking && st != PY_LOCK_ACQUIRED) { |
| 343 | PyObject *msgobj = PyUnicode_FromFormat( |
| 344 | "could not acquire lock for %A at interpreter " |
| 345 | "shutdown, possibly due to daemon threads", |
| 346 | (PyObject *) self); |
| 347 | char *msg = PyUnicode_AsUTF8(msgobj); |
| 348 | Py_FatalError(msg); |
| 349 | } |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 350 | return 1; |
| 351 | } |
| 352 | |
| 353 | #define ENTER_BUFFERED(self) \ |
| 354 | ( (PyThread_acquire_lock(self->lock, 0) ? \ |
| 355 | 1 : _enter_buffered_busy(self)) \ |
| 356 | && (self->owner = PyThread_get_thread_ident(), 1) ) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 357 | |
| 358 | #define LEAVE_BUFFERED(self) \ |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 359 | do { \ |
| 360 | self->owner = 0; \ |
| 361 | PyThread_release_lock(self->lock); \ |
| 362 | } while(0); |
| 363 | |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 364 | #else |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 365 | #define ENTER_BUFFERED(self) 1 |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 366 | #define LEAVE_BUFFERED(self) |
| 367 | #endif |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 368 | |
| 369 | #define CHECK_INITIALIZED(self) \ |
| 370 | if (self->ok <= 0) { \ |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 371 | if (self->detached) { \ |
| 372 | PyErr_SetString(PyExc_ValueError, \ |
| 373 | "raw stream has been detached"); \ |
| 374 | } else { \ |
| 375 | PyErr_SetString(PyExc_ValueError, \ |
| 376 | "I/O operation on uninitialized object"); \ |
| 377 | } \ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 378 | return NULL; \ |
| 379 | } |
| 380 | |
| 381 | #define CHECK_INITIALIZED_INT(self) \ |
| 382 | if (self->ok <= 0) { \ |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 383 | if (self->detached) { \ |
| 384 | PyErr_SetString(PyExc_ValueError, \ |
| 385 | "raw stream has been detached"); \ |
| 386 | } else { \ |
| 387 | PyErr_SetString(PyExc_ValueError, \ |
| 388 | "I/O operation on uninitialized object"); \ |
| 389 | } \ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 390 | return -1; \ |
| 391 | } |
| 392 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 393 | #define IS_CLOSED(self) \ |
| 394 | (self->fast_closed_checks \ |
| 395 | ? _PyFileIO_closed(self->raw) \ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 396 | : buffered_closed(self)) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 397 | |
| 398 | #define CHECK_CLOSED(self, error_msg) \ |
| 399 | if (IS_CLOSED(self)) { \ |
| 400 | PyErr_SetString(PyExc_ValueError, error_msg); \ |
| 401 | return NULL; \ |
| 402 | } |
| 403 | |
| 404 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 405 | #define VALID_READ_BUFFER(self) \ |
| 406 | (self->readable && self->read_end != -1) |
| 407 | |
| 408 | #define VALID_WRITE_BUFFER(self) \ |
| 409 | (self->writable && self->write_end != -1) |
| 410 | |
| 411 | #define ADJUST_POSITION(self, _new_pos) \ |
| 412 | do { \ |
| 413 | self->pos = _new_pos; \ |
| 414 | if (VALID_READ_BUFFER(self) && self->read_end < self->pos) \ |
| 415 | self->read_end = self->pos; \ |
| 416 | } while(0) |
| 417 | |
| 418 | #define READAHEAD(self) \ |
| 419 | ((self->readable && VALID_READ_BUFFER(self)) \ |
| 420 | ? (self->read_end - self->pos) : 0) |
| 421 | |
| 422 | #define RAW_OFFSET(self) \ |
| 423 | (((VALID_READ_BUFFER(self) || VALID_WRITE_BUFFER(self)) \ |
| 424 | && self->raw_pos >= 0) ? self->raw_pos - self->pos : 0) |
| 425 | |
| 426 | #define RAW_TELL(self) \ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 427 | (self->abs_pos != -1 ? self->abs_pos : _buffered_raw_tell(self)) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 428 | |
| 429 | #define MINUS_LAST_BLOCK(self, size) \ |
| 430 | (self->buffer_mask ? \ |
| 431 | (size & ~self->buffer_mask) : \ |
| 432 | (self->buffer_size * (size / self->buffer_size))) |
| 433 | |
| 434 | |
| 435 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 436 | buffered_dealloc(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 437 | { |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 438 | self->finalizing = 1; |
| 439 | if (_PyIOBase_finalize((PyObject *) self) < 0) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 440 | return; |
| 441 | _PyObject_GC_UNTRACK(self); |
| 442 | self->ok = 0; |
| 443 | if (self->weakreflist != NULL) |
| 444 | PyObject_ClearWeakRefs((PyObject *)self); |
| 445 | Py_CLEAR(self->raw); |
| 446 | if (self->buffer) { |
| 447 | PyMem_Free(self->buffer); |
| 448 | self->buffer = NULL; |
| 449 | } |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 450 | #ifdef WITH_THREAD |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 451 | if (self->lock) { |
| 452 | PyThread_free_lock(self->lock); |
| 453 | self->lock = NULL; |
| 454 | } |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 455 | #endif |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 456 | Py_CLEAR(self->dict); |
| 457 | Py_TYPE(self)->tp_free((PyObject *)self); |
| 458 | } |
| 459 | |
Antoine Pitrou | 10f0c50 | 2012-07-29 19:02:46 +0200 | [diff] [blame] | 460 | static PyObject * |
| 461 | buffered_sizeof(buffered *self, void *unused) |
| 462 | { |
| 463 | Py_ssize_t res; |
| 464 | |
| 465 | res = sizeof(buffered); |
| 466 | if (self->buffer) |
| 467 | res += self->buffer_size; |
| 468 | return PyLong_FromSsize_t(res); |
| 469 | } |
| 470 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 471 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 472 | buffered_traverse(buffered *self, visitproc visit, void *arg) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 473 | { |
| 474 | Py_VISIT(self->raw); |
| 475 | Py_VISIT(self->dict); |
| 476 | return 0; |
| 477 | } |
| 478 | |
| 479 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 480 | buffered_clear(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 481 | { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 482 | self->ok = 0; |
| 483 | Py_CLEAR(self->raw); |
| 484 | Py_CLEAR(self->dict); |
| 485 | return 0; |
| 486 | } |
| 487 | |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 488 | /* Because this can call arbitrary code, it shouldn't be called when |
| 489 | the refcount is 0 (that is, not directly from tp_dealloc unless |
| 490 | the refcount has been temporarily re-incremented). */ |
Matthias Klose | bee3316 | 2010-11-16 20:07:51 +0000 | [diff] [blame] | 491 | static PyObject * |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 492 | buffered_dealloc_warn(buffered *self, PyObject *source) |
| 493 | { |
| 494 | if (self->ok && self->raw) { |
| 495 | PyObject *r; |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 496 | r = _PyObject_CallMethodId(self->raw, &PyId__dealloc_warn, "O", source); |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 497 | if (r) |
| 498 | Py_DECREF(r); |
| 499 | else |
| 500 | PyErr_Clear(); |
| 501 | } |
| 502 | Py_RETURN_NONE; |
| 503 | } |
| 504 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 505 | /* |
| 506 | * _BufferedIOMixin methods |
| 507 | * This is not a class, just a collection of methods that will be reused |
| 508 | * by BufferedReader and BufferedWriter |
| 509 | */ |
| 510 | |
| 511 | /* Flush and close */ |
| 512 | |
| 513 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 514 | buffered_simple_flush(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 515 | { |
| 516 | CHECK_INITIALIZED(self) |
| 517 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_flush, NULL); |
| 518 | } |
| 519 | |
| 520 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 521 | buffered_closed(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 522 | { |
| 523 | int closed; |
| 524 | PyObject *res; |
| 525 | CHECK_INITIALIZED_INT(self) |
| 526 | res = PyObject_GetAttr(self->raw, _PyIO_str_closed); |
| 527 | if (res == NULL) |
| 528 | return -1; |
| 529 | closed = PyObject_IsTrue(res); |
| 530 | Py_DECREF(res); |
| 531 | return closed; |
| 532 | } |
| 533 | |
| 534 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 535 | buffered_closed_get(buffered *self, void *context) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 536 | { |
| 537 | CHECK_INITIALIZED(self) |
| 538 | return PyObject_GetAttr(self->raw, _PyIO_str_closed); |
| 539 | } |
| 540 | |
| 541 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 542 | buffered_close(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 543 | { |
Benjamin Peterson | 6862361 | 2012-12-20 11:53:11 -0600 | [diff] [blame] | 544 | PyObject *res = NULL, *exc = NULL, *val, *tb; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 545 | int r; |
| 546 | |
| 547 | CHECK_INITIALIZED(self) |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 548 | if (!ENTER_BUFFERED(self)) |
| 549 | return NULL; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 550 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 551 | r = buffered_closed(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 552 | if (r < 0) |
| 553 | goto end; |
| 554 | if (r > 0) { |
| 555 | res = Py_None; |
| 556 | Py_INCREF(res); |
| 557 | goto end; |
| 558 | } |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 559 | |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 560 | if (self->finalizing) { |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 561 | PyObject *r = buffered_dealloc_warn(self, (PyObject *) self); |
| 562 | if (r) |
| 563 | Py_DECREF(r); |
| 564 | else |
| 565 | PyErr_Clear(); |
| 566 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 567 | /* flush() will most probably re-take the lock, so drop it first */ |
| 568 | LEAVE_BUFFERED(self) |
| 569 | res = PyObject_CallMethodObjArgs((PyObject *)self, _PyIO_str_flush, NULL); |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 570 | if (!ENTER_BUFFERED(self)) |
| 571 | return NULL; |
Benjamin Peterson | 6862361 | 2012-12-20 11:53:11 -0600 | [diff] [blame] | 572 | if (res == NULL) |
| 573 | PyErr_Fetch(&exc, &val, &tb); |
| 574 | else |
| 575 | Py_DECREF(res); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 576 | |
| 577 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_close, NULL); |
| 578 | |
Jesus Cea | dc46945 | 2012-10-04 12:37:56 +0200 | [diff] [blame] | 579 | if (self->buffer) { |
| 580 | PyMem_Free(self->buffer); |
| 581 | self->buffer = NULL; |
| 582 | } |
| 583 | |
Benjamin Peterson | 6862361 | 2012-12-20 11:53:11 -0600 | [diff] [blame] | 584 | if (exc != NULL) { |
Serhiy Storchaka | e2bd2a7 | 2014-10-08 22:31:52 +0300 | [diff] [blame] | 585 | _PyErr_ChainExceptions(exc, val, tb); |
| 586 | Py_CLEAR(res); |
Benjamin Peterson | 6862361 | 2012-12-20 11:53:11 -0600 | [diff] [blame] | 587 | } |
| 588 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 589 | end: |
| 590 | LEAVE_BUFFERED(self) |
| 591 | return res; |
| 592 | } |
| 593 | |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 594 | /* detach */ |
| 595 | |
| 596 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 597 | buffered_detach(buffered *self, PyObject *args) |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 598 | { |
| 599 | PyObject *raw, *res; |
| 600 | CHECK_INITIALIZED(self) |
| 601 | res = PyObject_CallMethodObjArgs((PyObject *)self, _PyIO_str_flush, NULL); |
| 602 | if (res == NULL) |
| 603 | return NULL; |
| 604 | Py_DECREF(res); |
| 605 | raw = self->raw; |
| 606 | self->raw = NULL; |
| 607 | self->detached = 1; |
| 608 | self->ok = 0; |
| 609 | return raw; |
| 610 | } |
| 611 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 612 | /* Inquiries */ |
| 613 | |
| 614 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 615 | buffered_seekable(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 616 | { |
| 617 | CHECK_INITIALIZED(self) |
| 618 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_seekable, NULL); |
| 619 | } |
| 620 | |
| 621 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 622 | buffered_readable(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 623 | { |
| 624 | CHECK_INITIALIZED(self) |
| 625 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readable, NULL); |
| 626 | } |
| 627 | |
| 628 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 629 | buffered_writable(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 630 | { |
| 631 | CHECK_INITIALIZED(self) |
| 632 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_writable, NULL); |
| 633 | } |
| 634 | |
| 635 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 636 | buffered_name_get(buffered *self, void *context) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 637 | { |
| 638 | CHECK_INITIALIZED(self) |
Martin v. Löwis | 767046a | 2011-10-14 15:35:36 +0200 | [diff] [blame] | 639 | return _PyObject_GetAttrId(self->raw, &PyId_name); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 643 | buffered_mode_get(buffered *self, void *context) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 644 | { |
| 645 | CHECK_INITIALIZED(self) |
Martin v. Löwis | 767046a | 2011-10-14 15:35:36 +0200 | [diff] [blame] | 646 | return _PyObject_GetAttrId(self->raw, &PyId_mode); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | /* Lower-level APIs */ |
| 650 | |
| 651 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 652 | buffered_fileno(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 653 | { |
| 654 | CHECK_INITIALIZED(self) |
| 655 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_fileno, NULL); |
| 656 | } |
| 657 | |
| 658 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 659 | buffered_isatty(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 660 | { |
| 661 | CHECK_INITIALIZED(self) |
| 662 | return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_isatty, NULL); |
| 663 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 664 | |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 665 | /* Serialization */ |
| 666 | |
| 667 | static PyObject * |
| 668 | buffered_getstate(buffered *self, PyObject *args) |
| 669 | { |
| 670 | PyErr_Format(PyExc_TypeError, |
| 671 | "cannot serialize '%s' object", Py_TYPE(self)->tp_name); |
| 672 | return NULL; |
| 673 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 674 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 675 | /* Forward decls */ |
| 676 | static PyObject * |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 677 | _bufferedwriter_flush_unlocked(buffered *); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 678 | static Py_ssize_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 679 | _bufferedreader_fill_buffer(buffered *self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 680 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 681 | _bufferedreader_reset_buf(buffered *self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 682 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 683 | _bufferedwriter_reset_buf(buffered *self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 684 | static PyObject * |
Victor Stinner | bc93a11 | 2011-06-01 00:01:24 +0200 | [diff] [blame] | 685 | _bufferedreader_peek_unlocked(buffered *self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 686 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 687 | _bufferedreader_read_all(buffered *self); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 688 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 689 | _bufferedreader_read_fast(buffered *self, Py_ssize_t); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 690 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 691 | _bufferedreader_read_generic(buffered *self, Py_ssize_t); |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 692 | static Py_ssize_t |
| 693 | _bufferedreader_raw_read(buffered *self, char *start, Py_ssize_t len); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 694 | |
| 695 | /* |
| 696 | * Helpers |
| 697 | */ |
| 698 | |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 699 | /* Sets the current error to BlockingIOError */ |
| 700 | static void |
| 701 | _set_BlockingIOError(char *msg, Py_ssize_t written) |
| 702 | { |
| 703 | PyObject *err; |
Victor Stinner | ace47d7 | 2013-07-18 01:41:08 +0200 | [diff] [blame] | 704 | PyErr_Clear(); |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 705 | err = PyObject_CallFunction(PyExc_BlockingIOError, "isn", |
| 706 | errno, msg, written); |
| 707 | if (err) |
| 708 | PyErr_SetObject(PyExc_BlockingIOError, err); |
| 709 | Py_XDECREF(err); |
| 710 | } |
| 711 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 712 | /* Returns the address of the `written` member if a BlockingIOError was |
| 713 | raised, NULL otherwise. The error is always re-raised. */ |
| 714 | static Py_ssize_t * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 715 | _buffered_check_blocking_error(void) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 716 | { |
| 717 | PyObject *t, *v, *tb; |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 718 | PyOSErrorObject *err; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 719 | |
| 720 | PyErr_Fetch(&t, &v, &tb); |
| 721 | if (v == NULL || !PyErr_GivenExceptionMatches(v, PyExc_BlockingIOError)) { |
| 722 | PyErr_Restore(t, v, tb); |
| 723 | return NULL; |
| 724 | } |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 725 | err = (PyOSErrorObject *) v; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 726 | /* TODO: sanity check (err->written >= 0) */ |
| 727 | PyErr_Restore(t, v, tb); |
| 728 | return &err->written; |
| 729 | } |
| 730 | |
| 731 | static Py_off_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 732 | _buffered_raw_tell(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 733 | { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 734 | Py_off_t n; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 735 | PyObject *res; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 736 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_tell, NULL); |
| 737 | if (res == NULL) |
| 738 | return -1; |
| 739 | n = PyNumber_AsOff_t(res, PyExc_ValueError); |
| 740 | Py_DECREF(res); |
| 741 | if (n < 0) { |
| 742 | if (!PyErr_Occurred()) |
| 743 | PyErr_Format(PyExc_IOError, |
Mark Dickinson | 1a0aaaa | 2009-11-24 20:54:11 +0000 | [diff] [blame] | 744 | "Raw stream returned invalid position %" PY_PRIdOFF, |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 745 | (PY_OFF_T_COMPAT)n); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 746 | return -1; |
| 747 | } |
| 748 | self->abs_pos = n; |
| 749 | return n; |
| 750 | } |
| 751 | |
| 752 | static Py_off_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 753 | _buffered_raw_seek(buffered *self, Py_off_t target, int whence) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 754 | { |
| 755 | PyObject *res, *posobj, *whenceobj; |
| 756 | Py_off_t n; |
| 757 | |
| 758 | posobj = PyLong_FromOff_t(target); |
| 759 | if (posobj == NULL) |
| 760 | return -1; |
| 761 | whenceobj = PyLong_FromLong(whence); |
| 762 | if (whenceobj == NULL) { |
| 763 | Py_DECREF(posobj); |
| 764 | return -1; |
| 765 | } |
| 766 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_seek, |
| 767 | posobj, whenceobj, NULL); |
| 768 | Py_DECREF(posobj); |
| 769 | Py_DECREF(whenceobj); |
| 770 | if (res == NULL) |
| 771 | return -1; |
| 772 | n = PyNumber_AsOff_t(res, PyExc_ValueError); |
| 773 | Py_DECREF(res); |
| 774 | if (n < 0) { |
| 775 | if (!PyErr_Occurred()) |
| 776 | PyErr_Format(PyExc_IOError, |
Mark Dickinson | 1a0aaaa | 2009-11-24 20:54:11 +0000 | [diff] [blame] | 777 | "Raw stream returned invalid position %" PY_PRIdOFF, |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 778 | (PY_OFF_T_COMPAT)n); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 779 | return -1; |
| 780 | } |
| 781 | self->abs_pos = n; |
| 782 | return n; |
| 783 | } |
| 784 | |
| 785 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 786 | _buffered_init(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 787 | { |
| 788 | Py_ssize_t n; |
| 789 | if (self->buffer_size <= 0) { |
| 790 | PyErr_SetString(PyExc_ValueError, |
| 791 | "buffer size must be strictly positive"); |
| 792 | return -1; |
| 793 | } |
| 794 | if (self->buffer) |
| 795 | PyMem_Free(self->buffer); |
| 796 | self->buffer = PyMem_Malloc(self->buffer_size); |
| 797 | if (self->buffer == NULL) { |
| 798 | PyErr_NoMemory(); |
| 799 | return -1; |
| 800 | } |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 801 | #ifdef WITH_THREAD |
Antoine Pitrou | c881f15 | 2010-08-01 16:53:42 +0000 | [diff] [blame] | 802 | if (self->lock) |
| 803 | PyThread_free_lock(self->lock); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 804 | self->lock = PyThread_allocate_lock(); |
| 805 | if (self->lock == NULL) { |
| 806 | PyErr_SetString(PyExc_RuntimeError, "can't allocate read lock"); |
| 807 | return -1; |
| 808 | } |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 809 | self->owner = 0; |
Georg Brandl | dfd7344 | 2009-04-05 11:47:34 +0000 | [diff] [blame] | 810 | #endif |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 811 | /* Find out whether buffer_size is a power of 2 */ |
| 812 | /* XXX is this optimization useful? */ |
| 813 | for (n = self->buffer_size - 1; n & 1; n >>= 1) |
| 814 | ; |
| 815 | if (n == 0) |
| 816 | self->buffer_mask = self->buffer_size - 1; |
| 817 | else |
| 818 | self->buffer_mask = 0; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 819 | if (_buffered_raw_tell(self) == -1) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 820 | PyErr_Clear(); |
| 821 | return 0; |
| 822 | } |
| 823 | |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 824 | /* Return 1 if an EnvironmentError with errno == EINTR is set (and then |
| 825 | clears the error indicator), 0 otherwise. |
| 826 | Should only be called when PyErr_Occurred() is true. |
| 827 | */ |
Gregory P. Smith | 5135992 | 2012-06-23 23:55:39 -0700 | [diff] [blame] | 828 | int |
| 829 | _PyIO_trap_eintr(void) |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 830 | { |
| 831 | static PyObject *eintr_int = NULL; |
| 832 | PyObject *typ, *val, *tb; |
| 833 | PyEnvironmentErrorObject *env_err; |
| 834 | |
| 835 | if (eintr_int == NULL) { |
| 836 | eintr_int = PyLong_FromLong(EINTR); |
| 837 | assert(eintr_int != NULL); |
| 838 | } |
| 839 | if (!PyErr_ExceptionMatches(PyExc_EnvironmentError)) |
| 840 | return 0; |
| 841 | PyErr_Fetch(&typ, &val, &tb); |
| 842 | PyErr_NormalizeException(&typ, &val, &tb); |
| 843 | env_err = (PyEnvironmentErrorObject *) val; |
| 844 | assert(env_err != NULL); |
| 845 | if (env_err->myerrno != NULL && |
| 846 | PyObject_RichCompareBool(env_err->myerrno, eintr_int, Py_EQ) > 0) { |
| 847 | Py_DECREF(typ); |
| 848 | Py_DECREF(val); |
| 849 | Py_XDECREF(tb); |
| 850 | return 1; |
| 851 | } |
| 852 | /* This silences any error set by PyObject_RichCompareBool() */ |
| 853 | PyErr_Restore(typ, val, tb); |
| 854 | return 0; |
| 855 | } |
| 856 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 857 | /* |
| 858 | * Shared methods and wrappers |
| 859 | */ |
| 860 | |
| 861 | static PyObject * |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 862 | buffered_flush_and_rewind_unlocked(buffered *self) |
| 863 | { |
| 864 | PyObject *res; |
| 865 | |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 866 | res = _bufferedwriter_flush_unlocked(self); |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 867 | if (res == NULL) |
| 868 | return NULL; |
| 869 | Py_DECREF(res); |
| 870 | |
| 871 | if (self->readable) { |
| 872 | /* Rewind the raw stream so that its position corresponds to |
| 873 | the current logical position. */ |
| 874 | Py_off_t n; |
| 875 | n = _buffered_raw_seek(self, -RAW_OFFSET(self), 1); |
| 876 | _bufferedreader_reset_buf(self); |
| 877 | if (n == -1) |
| 878 | return NULL; |
| 879 | } |
| 880 | Py_RETURN_NONE; |
| 881 | } |
| 882 | |
| 883 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 884 | buffered_flush(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 885 | { |
| 886 | PyObject *res; |
| 887 | |
| 888 | CHECK_INITIALIZED(self) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 889 | CHECK_CLOSED(self, "flush of closed file") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 890 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 891 | if (!ENTER_BUFFERED(self)) |
| 892 | return NULL; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 893 | res = buffered_flush_and_rewind_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 894 | LEAVE_BUFFERED(self) |
| 895 | |
| 896 | return res; |
| 897 | } |
| 898 | |
| 899 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 900 | buffered_peek(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 901 | { |
| 902 | Py_ssize_t n = 0; |
| 903 | PyObject *res = NULL; |
| 904 | |
| 905 | CHECK_INITIALIZED(self) |
| 906 | if (!PyArg_ParseTuple(args, "|n:peek", &n)) { |
| 907 | return NULL; |
| 908 | } |
| 909 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 910 | if (!ENTER_BUFFERED(self)) |
| 911 | return NULL; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 912 | |
| 913 | if (self->writable) { |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 914 | res = buffered_flush_and_rewind_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 915 | if (res == NULL) |
| 916 | goto end; |
| 917 | Py_CLEAR(res); |
| 918 | } |
Victor Stinner | bc93a11 | 2011-06-01 00:01:24 +0200 | [diff] [blame] | 919 | res = _bufferedreader_peek_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 920 | |
| 921 | end: |
| 922 | LEAVE_BUFFERED(self) |
| 923 | return res; |
| 924 | } |
| 925 | |
| 926 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 927 | buffered_read(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 928 | { |
| 929 | Py_ssize_t n = -1; |
| 930 | PyObject *res; |
| 931 | |
| 932 | CHECK_INITIALIZED(self) |
Benjamin Peterson | bf5ff76 | 2009-12-13 19:25:34 +0000 | [diff] [blame] | 933 | if (!PyArg_ParseTuple(args, "|O&:read", &_PyIO_ConvertSsize_t, &n)) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 934 | return NULL; |
| 935 | } |
| 936 | if (n < -1) { |
| 937 | PyErr_SetString(PyExc_ValueError, |
| 938 | "read length must be positive or -1"); |
| 939 | return NULL; |
| 940 | } |
| 941 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 942 | CHECK_CLOSED(self, "read of closed file") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 943 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 944 | if (n == -1) { |
| 945 | /* The number of bytes is unspecified, read until the end of stream */ |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 946 | if (!ENTER_BUFFERED(self)) |
| 947 | return NULL; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 948 | res = _bufferedreader_read_all(self); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 949 | } |
| 950 | else { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 951 | res = _bufferedreader_read_fast(self, n); |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 952 | if (res != Py_None) |
| 953 | return res; |
| 954 | Py_DECREF(res); |
| 955 | if (!ENTER_BUFFERED(self)) |
| 956 | return NULL; |
| 957 | res = _bufferedreader_read_generic(self, n); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 958 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 959 | |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 960 | LEAVE_BUFFERED(self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 961 | return res; |
| 962 | } |
| 963 | |
| 964 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 965 | buffered_read1(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 966 | { |
| 967 | Py_ssize_t n, have, r; |
| 968 | PyObject *res = NULL; |
| 969 | |
| 970 | CHECK_INITIALIZED(self) |
| 971 | if (!PyArg_ParseTuple(args, "n:read1", &n)) { |
| 972 | return NULL; |
| 973 | } |
| 974 | |
| 975 | if (n < 0) { |
| 976 | PyErr_SetString(PyExc_ValueError, |
| 977 | "read length must be positive"); |
| 978 | return NULL; |
| 979 | } |
| 980 | if (n == 0) |
| 981 | return PyBytes_FromStringAndSize(NULL, 0); |
| 982 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 983 | /* Return up to n bytes. If at least one byte is buffered, we |
| 984 | only return buffered bytes. Otherwise, we do one raw read. */ |
| 985 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 986 | have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 987 | if (have > 0) { |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 988 | n = Py_MIN(have, n); |
| 989 | res = _bufferedreader_read_fast(self, n); |
| 990 | assert(res != Py_None); |
| 991 | return res; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 992 | } |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 993 | res = PyBytes_FromStringAndSize(NULL, n); |
| 994 | if (res == NULL) |
| 995 | return NULL; |
| 996 | if (!ENTER_BUFFERED(self)) { |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 997 | Py_DECREF(res); |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 998 | return NULL; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 999 | } |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1000 | _bufferedreader_reset_buf(self); |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 1001 | r = _bufferedreader_raw_read(self, PyBytes_AS_STRING(res), n); |
| 1002 | LEAVE_BUFFERED(self) |
| 1003 | if (r == -1) { |
| 1004 | Py_DECREF(res); |
| 1005 | return NULL; |
| 1006 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1007 | if (r == -2) |
| 1008 | r = 0; |
| 1009 | if (n > r) |
Antoine Pitrou | 56a220a | 2011-11-16 00:56:10 +0100 | [diff] [blame] | 1010 | _PyBytes_Resize(&res, r); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1011 | return res; |
| 1012 | } |
| 1013 | |
| 1014 | static PyObject * |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 1015 | _buffered_readinto_generic(buffered *self, PyObject *args, char readinto1) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1016 | { |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1017 | Py_buffer buf; |
| 1018 | Py_ssize_t n, written = 0, remaining; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1019 | PyObject *res = NULL; |
| 1020 | |
| 1021 | CHECK_INITIALIZED(self) |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1022 | |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 1023 | if (!PyArg_ParseTuple(args, |
| 1024 | readinto1 ? "w*:readinto1" : "w*:readinto", |
| 1025 | &buf)) |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1026 | return NULL; |
| 1027 | |
| 1028 | n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1029 | if (n > 0) { |
| 1030 | if (n >= buf.len) { |
| 1031 | memcpy(buf.buf, self->buffer + self->pos, buf.len); |
| 1032 | self->pos += buf.len; |
| 1033 | res = PyLong_FromSsize_t(buf.len); |
| 1034 | goto end_unlocked; |
| 1035 | } |
| 1036 | memcpy(buf.buf, self->buffer + self->pos, n); |
| 1037 | self->pos += n; |
| 1038 | written = n; |
| 1039 | } |
| 1040 | |
| 1041 | if (!ENTER_BUFFERED(self)) |
| 1042 | goto end_unlocked; |
| 1043 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1044 | if (self->writable) { |
Antoine Pitrou | e8bb1a0 | 2011-08-20 14:52:04 +0200 | [diff] [blame] | 1045 | res = buffered_flush_and_rewind_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1046 | if (res == NULL) |
| 1047 | goto end; |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1048 | Py_CLEAR(res); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1049 | } |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1050 | |
| 1051 | _bufferedreader_reset_buf(self); |
| 1052 | self->pos = 0; |
| 1053 | |
| 1054 | for (remaining = buf.len - written; |
| 1055 | remaining > 0; |
| 1056 | written += n, remaining -= n) { |
| 1057 | /* If remaining bytes is larger than internal buffer size, copy |
| 1058 | * directly into caller's buffer. */ |
| 1059 | if (remaining > self->buffer_size) { |
Antoine Pitrou | 4e19e11 | 2011-05-12 02:07:00 +0200 | [diff] [blame] | 1060 | n = _bufferedreader_raw_read(self, (char *) buf.buf + written, |
| 1061 | remaining); |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1062 | } |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 1063 | |
| 1064 | /* In readinto1 mode, we do not want to fill the internal |
| 1065 | buffer if we already have some data to return */ |
| 1066 | else if (!(readinto1 && written)) { |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1067 | n = _bufferedreader_fill_buffer(self); |
| 1068 | if (n > 0) { |
| 1069 | if (n > remaining) |
| 1070 | n = remaining; |
Antoine Pitrou | 4e19e11 | 2011-05-12 02:07:00 +0200 | [diff] [blame] | 1071 | memcpy((char *) buf.buf + written, |
| 1072 | self->buffer + self->pos, n); |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1073 | self->pos += n; |
| 1074 | continue; /* short circuit */ |
| 1075 | } |
| 1076 | } |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 1077 | else |
| 1078 | n = 0; |
Serhiy Storchaka | 009b811 | 2015-03-18 21:53:15 +0200 | [diff] [blame] | 1079 | |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1080 | if (n == 0 || (n == -2 && written > 0)) |
| 1081 | break; |
| 1082 | if (n < 0) { |
| 1083 | if (n == -2) { |
| 1084 | Py_INCREF(Py_None); |
| 1085 | res = Py_None; |
| 1086 | } |
| 1087 | goto end; |
| 1088 | } |
Serhiy Storchaka | 009b811 | 2015-03-18 21:53:15 +0200 | [diff] [blame] | 1089 | |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 1090 | /* At most one read in readinto1 mode */ |
| 1091 | if (readinto1) { |
| 1092 | written += n; |
| 1093 | break; |
| 1094 | } |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1095 | } |
| 1096 | res = PyLong_FromSsize_t(written); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1097 | |
| 1098 | end: |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1099 | LEAVE_BUFFERED(self); |
| 1100 | end_unlocked: |
| 1101 | PyBuffer_Release(&buf); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1102 | return res; |
| 1103 | } |
| 1104 | |
| 1105 | static PyObject * |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 1106 | buffered_readinto(buffered *self, PyObject *args) |
| 1107 | { |
| 1108 | return _buffered_readinto_generic(self, args, 0); |
| 1109 | } |
| 1110 | |
| 1111 | static PyObject * |
| 1112 | buffered_readinto1(buffered *self, PyObject *args) |
| 1113 | { |
| 1114 | return _buffered_readinto_generic(self, args, 1); |
| 1115 | } |
| 1116 | |
| 1117 | |
| 1118 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1119 | _buffered_readline(buffered *self, Py_ssize_t limit) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1120 | { |
| 1121 | PyObject *res = NULL; |
| 1122 | PyObject *chunks = NULL; |
| 1123 | Py_ssize_t n, written = 0; |
| 1124 | const char *start, *s, *end; |
| 1125 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1126 | CHECK_CLOSED(self, "readline of closed file") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1127 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1128 | /* First, try to find a line in the buffer. This can run unlocked because |
| 1129 | the calls to the C API are simple enough that they can't trigger |
| 1130 | any thread switch. */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1131 | n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1132 | if (limit >= 0 && n > limit) |
| 1133 | n = limit; |
| 1134 | start = self->buffer + self->pos; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1135 | s = memchr(start, '\n', n); |
| 1136 | if (s != NULL) { |
| 1137 | res = PyBytes_FromStringAndSize(start, s - start + 1); |
| 1138 | if (res != NULL) |
| 1139 | self->pos += s - start + 1; |
| 1140 | goto end_unlocked; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1141 | } |
| 1142 | if (n == limit) { |
| 1143 | res = PyBytes_FromStringAndSize(start, n); |
| 1144 | if (res != NULL) |
| 1145 | self->pos += n; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1146 | goto end_unlocked; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1147 | } |
| 1148 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 1149 | if (!ENTER_BUFFERED(self)) |
| 1150 | goto end_unlocked; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1151 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1152 | /* Now we try to get some more from the raw stream */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1153 | chunks = PyList_New(0); |
| 1154 | if (chunks == NULL) |
| 1155 | goto end; |
| 1156 | if (n > 0) { |
| 1157 | res = PyBytes_FromStringAndSize(start, n); |
| 1158 | if (res == NULL) |
| 1159 | goto end; |
| 1160 | if (PyList_Append(chunks, res) < 0) { |
| 1161 | Py_CLEAR(res); |
| 1162 | goto end; |
| 1163 | } |
| 1164 | Py_CLEAR(res); |
| 1165 | written += n; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1166 | self->pos += n; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1167 | if (limit >= 0) |
| 1168 | limit -= n; |
| 1169 | } |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1170 | if (self->writable) { |
| 1171 | PyObject *r = buffered_flush_and_rewind_unlocked(self); |
| 1172 | if (r == NULL) |
| 1173 | goto end; |
| 1174 | Py_DECREF(r); |
| 1175 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1176 | |
| 1177 | for (;;) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1178 | _bufferedreader_reset_buf(self); |
| 1179 | n = _bufferedreader_fill_buffer(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1180 | if (n == -1) |
| 1181 | goto end; |
| 1182 | if (n <= 0) |
| 1183 | break; |
| 1184 | if (limit >= 0 && n > limit) |
| 1185 | n = limit; |
| 1186 | start = self->buffer; |
| 1187 | end = start + n; |
| 1188 | s = start; |
| 1189 | while (s < end) { |
| 1190 | if (*s++ == '\n') { |
| 1191 | res = PyBytes_FromStringAndSize(start, s - start); |
| 1192 | if (res == NULL) |
| 1193 | goto end; |
| 1194 | self->pos = s - start; |
| 1195 | goto found; |
| 1196 | } |
| 1197 | } |
| 1198 | res = PyBytes_FromStringAndSize(start, n); |
| 1199 | if (res == NULL) |
| 1200 | goto end; |
| 1201 | if (n == limit) { |
| 1202 | self->pos = n; |
| 1203 | break; |
| 1204 | } |
| 1205 | if (PyList_Append(chunks, res) < 0) { |
| 1206 | Py_CLEAR(res); |
| 1207 | goto end; |
| 1208 | } |
| 1209 | Py_CLEAR(res); |
| 1210 | written += n; |
| 1211 | if (limit >= 0) |
| 1212 | limit -= n; |
| 1213 | } |
| 1214 | found: |
| 1215 | if (res != NULL && PyList_Append(chunks, res) < 0) { |
| 1216 | Py_CLEAR(res); |
| 1217 | goto end; |
| 1218 | } |
| 1219 | Py_CLEAR(res); |
| 1220 | res = _PyBytes_Join(_PyIO_empty_bytes, chunks); |
| 1221 | |
| 1222 | end: |
| 1223 | LEAVE_BUFFERED(self) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1224 | end_unlocked: |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1225 | Py_XDECREF(chunks); |
| 1226 | return res; |
| 1227 | } |
| 1228 | |
| 1229 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1230 | buffered_readline(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1231 | { |
| 1232 | Py_ssize_t limit = -1; |
| 1233 | |
| 1234 | CHECK_INITIALIZED(self) |
Benjamin Peterson | bf5ff76 | 2009-12-13 19:25:34 +0000 | [diff] [blame] | 1235 | if (!PyArg_ParseTuple(args, "|O&:readline", &_PyIO_ConvertSsize_t, &limit)) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1236 | return NULL; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1237 | return _buffered_readline(self, limit); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | |
| 1241 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1242 | buffered_tell(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1243 | { |
| 1244 | Py_off_t pos; |
| 1245 | |
| 1246 | CHECK_INITIALIZED(self) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1247 | pos = _buffered_raw_tell(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1248 | if (pos == -1) |
| 1249 | return NULL; |
| 1250 | pos -= RAW_OFFSET(self); |
| 1251 | /* TODO: sanity check (pos >= 0) */ |
| 1252 | return PyLong_FromOff_t(pos); |
| 1253 | } |
| 1254 | |
| 1255 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1256 | buffered_seek(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1257 | { |
| 1258 | Py_off_t target, n; |
| 1259 | int whence = 0; |
| 1260 | PyObject *targetobj, *res = NULL; |
| 1261 | |
| 1262 | CHECK_INITIALIZED(self) |
| 1263 | if (!PyArg_ParseTuple(args, "O|i:seek", &targetobj, &whence)) { |
| 1264 | return NULL; |
| 1265 | } |
Jesus Cea | 9436361 | 2012-06-22 18:32:07 +0200 | [diff] [blame] | 1266 | |
| 1267 | /* Do some error checking instead of trusting OS 'seek()' |
| 1268 | ** error detection, just in case. |
| 1269 | */ |
| 1270 | if ((whence < 0 || whence >2) |
| 1271 | #ifdef SEEK_HOLE |
| 1272 | && (whence != SEEK_HOLE) |
| 1273 | #endif |
| 1274 | #ifdef SEEK_DATA |
| 1275 | && (whence != SEEK_DATA) |
| 1276 | #endif |
| 1277 | ) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1278 | PyErr_Format(PyExc_ValueError, |
Jesus Cea | 9436361 | 2012-06-22 18:32:07 +0200 | [diff] [blame] | 1279 | "whence value %d unsupported", whence); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1280 | return NULL; |
| 1281 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1282 | |
| 1283 | CHECK_CLOSED(self, "seek of closed file") |
| 1284 | |
Antoine Pitrou | 1e44fec | 2011-10-04 12:26:20 +0200 | [diff] [blame] | 1285 | if (_PyIOBase_check_seekable(self->raw, Py_True) == NULL) |
| 1286 | return NULL; |
| 1287 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1288 | target = PyNumber_AsOff_t(targetobj, PyExc_ValueError); |
| 1289 | if (target == -1 && PyErr_Occurred()) |
| 1290 | return NULL; |
| 1291 | |
Jesus Cea | 9436361 | 2012-06-22 18:32:07 +0200 | [diff] [blame] | 1292 | /* SEEK_SET and SEEK_CUR are special because we could seek inside the |
| 1293 | buffer. Other whence values must be managed without this optimization. |
| 1294 | Some Operating Systems can provide additional values, like |
| 1295 | SEEK_HOLE/SEEK_DATA. */ |
| 1296 | if (((whence == 0) || (whence == 1)) && self->readable) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1297 | Py_off_t current, avail; |
| 1298 | /* Check if seeking leaves us inside the current buffer, |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1299 | so as to return quickly if possible. Also, we needn't take the |
| 1300 | lock in this fast path. |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1301 | Don't know how to do that when whence == 2, though. */ |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1302 | /* NOTE: RAW_TELL() can release the GIL but the object is in a stable |
| 1303 | state at this point. */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1304 | current = RAW_TELL(self); |
| 1305 | avail = READAHEAD(self); |
| 1306 | if (avail > 0) { |
| 1307 | Py_off_t offset; |
| 1308 | if (whence == 0) |
| 1309 | offset = target - (current - RAW_OFFSET(self)); |
| 1310 | else |
| 1311 | offset = target; |
| 1312 | if (offset >= -self->pos && offset <= avail) { |
| 1313 | self->pos += offset; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1314 | return PyLong_FromOff_t(current - avail + offset); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1315 | } |
| 1316 | } |
| 1317 | } |
| 1318 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 1319 | if (!ENTER_BUFFERED(self)) |
| 1320 | return NULL; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1321 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1322 | /* Fallback: invoke raw seek() method and clear buffer */ |
| 1323 | if (self->writable) { |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1324 | res = _bufferedwriter_flush_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1325 | if (res == NULL) |
| 1326 | goto end; |
| 1327 | Py_CLEAR(res); |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1328 | _bufferedwriter_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1329 | } |
| 1330 | |
| 1331 | /* TODO: align on block boundary and read buffer if needed? */ |
| 1332 | if (whence == 1) |
| 1333 | target -= RAW_OFFSET(self); |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1334 | n = _buffered_raw_seek(self, target, whence); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1335 | if (n == -1) |
| 1336 | goto end; |
| 1337 | self->raw_pos = -1; |
| 1338 | res = PyLong_FromOff_t(n); |
| 1339 | if (res != NULL && self->readable) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1340 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1341 | |
| 1342 | end: |
| 1343 | LEAVE_BUFFERED(self) |
| 1344 | return res; |
| 1345 | } |
| 1346 | |
| 1347 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1348 | buffered_truncate(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1349 | { |
| 1350 | PyObject *pos = Py_None; |
| 1351 | PyObject *res = NULL; |
| 1352 | |
| 1353 | CHECK_INITIALIZED(self) |
| 1354 | if (!PyArg_ParseTuple(args, "|O:truncate", &pos)) { |
| 1355 | return NULL; |
| 1356 | } |
| 1357 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 1358 | if (!ENTER_BUFFERED(self)) |
| 1359 | return NULL; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1360 | |
| 1361 | if (self->writable) { |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1362 | res = buffered_flush_and_rewind_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1363 | if (res == NULL) |
| 1364 | goto end; |
| 1365 | Py_CLEAR(res); |
| 1366 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1367 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_truncate, pos, NULL); |
| 1368 | if (res == NULL) |
| 1369 | goto end; |
| 1370 | /* Reset cached position */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1371 | if (_buffered_raw_tell(self) == -1) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1372 | PyErr_Clear(); |
| 1373 | |
| 1374 | end: |
| 1375 | LEAVE_BUFFERED(self) |
| 1376 | return res; |
| 1377 | } |
| 1378 | |
| 1379 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1380 | buffered_iternext(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1381 | { |
| 1382 | PyObject *line; |
| 1383 | PyTypeObject *tp; |
| 1384 | |
| 1385 | CHECK_INITIALIZED(self); |
| 1386 | |
| 1387 | tp = Py_TYPE(self); |
| 1388 | if (tp == &PyBufferedReader_Type || |
| 1389 | tp == &PyBufferedRandom_Type) { |
| 1390 | /* Skip method call overhead for speed */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1391 | line = _buffered_readline(self, -1); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1392 | } |
| 1393 | else { |
| 1394 | line = PyObject_CallMethodObjArgs((PyObject *)self, |
| 1395 | _PyIO_str_readline, NULL); |
| 1396 | if (line && !PyBytes_Check(line)) { |
| 1397 | PyErr_Format(PyExc_IOError, |
| 1398 | "readline() should have returned a bytes object, " |
| 1399 | "not '%.200s'", Py_TYPE(line)->tp_name); |
| 1400 | Py_DECREF(line); |
| 1401 | return NULL; |
| 1402 | } |
| 1403 | } |
| 1404 | |
| 1405 | if (line == NULL) |
| 1406 | return NULL; |
| 1407 | |
| 1408 | if (PyBytes_GET_SIZE(line) == 0) { |
| 1409 | /* Reached EOF or would have blocked */ |
| 1410 | Py_DECREF(line); |
| 1411 | return NULL; |
| 1412 | } |
| 1413 | |
| 1414 | return line; |
| 1415 | } |
| 1416 | |
Antoine Pitrou | 716c444 | 2009-05-23 19:04:03 +0000 | [diff] [blame] | 1417 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1418 | buffered_repr(buffered *self) |
Antoine Pitrou | 716c444 | 2009-05-23 19:04:03 +0000 | [diff] [blame] | 1419 | { |
| 1420 | PyObject *nameobj, *res; |
| 1421 | |
Martin v. Löwis | 767046a | 2011-10-14 15:35:36 +0200 | [diff] [blame] | 1422 | nameobj = _PyObject_GetAttrId((PyObject *) self, &PyId_name); |
Antoine Pitrou | 716c444 | 2009-05-23 19:04:03 +0000 | [diff] [blame] | 1423 | if (nameobj == NULL) { |
Benjamin Peterson | 10e76b6 | 2014-12-21 20:51:50 -0600 | [diff] [blame] | 1424 | if (PyErr_ExceptionMatches(PyExc_Exception)) |
Antoine Pitrou | 716c444 | 2009-05-23 19:04:03 +0000 | [diff] [blame] | 1425 | PyErr_Clear(); |
| 1426 | else |
| 1427 | return NULL; |
| 1428 | res = PyUnicode_FromFormat("<%s>", Py_TYPE(self)->tp_name); |
| 1429 | } |
| 1430 | else { |
| 1431 | res = PyUnicode_FromFormat("<%s name=%R>", |
| 1432 | Py_TYPE(self)->tp_name, nameobj); |
| 1433 | Py_DECREF(nameobj); |
| 1434 | } |
| 1435 | return res; |
| 1436 | } |
| 1437 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1438 | /* |
| 1439 | * class BufferedReader |
| 1440 | */ |
| 1441 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1442 | PyDoc_STRVAR(bufferedreader_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1443 | "Create a new buffered reader using the given readable raw IO object."); |
| 1444 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1445 | static void _bufferedreader_reset_buf(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1446 | { |
| 1447 | self->read_end = -1; |
| 1448 | } |
| 1449 | |
| 1450 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1451 | bufferedreader_init(buffered *self, PyObject *args, PyObject *kwds) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1452 | { |
| 1453 | char *kwlist[] = {"raw", "buffer_size", NULL}; |
| 1454 | Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
| 1455 | PyObject *raw; |
| 1456 | |
| 1457 | self->ok = 0; |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 1458 | self->detached = 0; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1459 | |
| 1460 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|n:BufferedReader", kwlist, |
| 1461 | &raw, &buffer_size)) { |
| 1462 | return -1; |
| 1463 | } |
| 1464 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1465 | if (_PyIOBase_check_readable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1466 | return -1; |
| 1467 | |
| 1468 | Py_CLEAR(self->raw); |
| 1469 | Py_INCREF(raw); |
| 1470 | self->raw = raw; |
| 1471 | self->buffer_size = buffer_size; |
| 1472 | self->readable = 1; |
| 1473 | self->writable = 0; |
| 1474 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1475 | if (_buffered_init(self) < 0) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1476 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1477 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1478 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1479 | self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedReader_Type && |
| 1480 | Py_TYPE(raw) == &PyFileIO_Type); |
| 1481 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1482 | self->ok = 1; |
| 1483 | return 0; |
| 1484 | } |
| 1485 | |
| 1486 | static Py_ssize_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1487 | _bufferedreader_raw_read(buffered *self, char *start, Py_ssize_t len) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1488 | { |
| 1489 | Py_buffer buf; |
| 1490 | PyObject *memobj, *res; |
| 1491 | Py_ssize_t n; |
| 1492 | /* NOTE: the buffer needn't be released as its object is NULL. */ |
| 1493 | if (PyBuffer_FillInfo(&buf, NULL, start, len, 0, PyBUF_CONTIG) == -1) |
| 1494 | return -1; |
| 1495 | memobj = PyMemoryView_FromBuffer(&buf); |
| 1496 | if (memobj == NULL) |
| 1497 | return -1; |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 1498 | /* NOTE: PyErr_SetFromErrno() calls PyErr_CheckSignals() when EINTR |
| 1499 | occurs so we needn't do it ourselves. |
| 1500 | We then retry reading, ignoring the signal if no handler has |
| 1501 | raised (see issue #10956). |
| 1502 | */ |
| 1503 | do { |
| 1504 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readinto, memobj, NULL); |
Gregory P. Smith | 5135992 | 2012-06-23 23:55:39 -0700 | [diff] [blame] | 1505 | } while (res == NULL && _PyIO_trap_eintr()); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1506 | Py_DECREF(memobj); |
| 1507 | if (res == NULL) |
| 1508 | return -1; |
| 1509 | if (res == Py_None) { |
| 1510 | /* Non-blocking stream would have blocked. Special return code! */ |
| 1511 | Py_DECREF(res); |
| 1512 | return -2; |
| 1513 | } |
| 1514 | n = PyNumber_AsSsize_t(res, PyExc_ValueError); |
| 1515 | Py_DECREF(res); |
| 1516 | if (n < 0 || n > len) { |
| 1517 | PyErr_Format(PyExc_IOError, |
| 1518 | "raw readinto() returned invalid length %zd " |
| 1519 | "(should have been between 0 and %zd)", n, len); |
| 1520 | return -1; |
| 1521 | } |
| 1522 | if (n > 0 && self->abs_pos != -1) |
| 1523 | self->abs_pos += n; |
| 1524 | return n; |
| 1525 | } |
| 1526 | |
| 1527 | static Py_ssize_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1528 | _bufferedreader_fill_buffer(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1529 | { |
| 1530 | Py_ssize_t start, len, n; |
| 1531 | if (VALID_READ_BUFFER(self)) |
| 1532 | start = Py_SAFE_DOWNCAST(self->read_end, Py_off_t, Py_ssize_t); |
| 1533 | else |
| 1534 | start = 0; |
| 1535 | len = self->buffer_size - start; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1536 | n = _bufferedreader_raw_read(self, self->buffer + start, len); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1537 | if (n <= 0) |
| 1538 | return n; |
| 1539 | self->read_end = start + n; |
| 1540 | self->raw_pos = start + n; |
| 1541 | return n; |
| 1542 | } |
| 1543 | |
| 1544 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1545 | _bufferedreader_read_all(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1546 | { |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1547 | Py_ssize_t current_size; |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1548 | PyObject *res = NULL, *data = NULL, *tmp = NULL, *chunks = NULL; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1549 | |
| 1550 | /* First copy what we have in the current buffer. */ |
| 1551 | current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1552 | if (current_size) { |
| 1553 | data = PyBytes_FromStringAndSize( |
| 1554 | self->buffer + self->pos, current_size); |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1555 | if (data == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1556 | return NULL; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1557 | self->pos += current_size; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1558 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1559 | /* We're going past the buffer's bounds, flush it */ |
| 1560 | if (self->writable) { |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1561 | tmp = buffered_flush_and_rewind_unlocked(self); |
| 1562 | if (tmp == NULL) |
| 1563 | goto cleanup; |
| 1564 | Py_CLEAR(tmp); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1565 | } |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1566 | _bufferedreader_reset_buf(self); |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1567 | |
| 1568 | if (PyObject_HasAttr(self->raw, _PyIO_str_readall)) { |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1569 | tmp = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readall, NULL); |
| 1570 | if (tmp == NULL) |
| 1571 | goto cleanup; |
| 1572 | if (tmp != Py_None && !PyBytes_Check(tmp)) { |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1573 | PyErr_SetString(PyExc_TypeError, "readall() should return bytes"); |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1574 | goto cleanup; |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1575 | } |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1576 | if (tmp == Py_None) { |
| 1577 | if (current_size == 0) { |
| 1578 | res = Py_None; |
| 1579 | goto cleanup; |
| 1580 | } else { |
| 1581 | res = data; |
| 1582 | goto cleanup; |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1583 | } |
| 1584 | } |
| 1585 | else if (current_size) { |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1586 | PyBytes_Concat(&data, tmp); |
| 1587 | res = data; |
| 1588 | goto cleanup; |
| 1589 | } |
| 1590 | else { |
| 1591 | res = tmp; |
| 1592 | goto cleanup; |
| 1593 | } |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1594 | } |
| 1595 | |
| 1596 | chunks = PyList_New(0); |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1597 | if (chunks == NULL) |
| 1598 | goto cleanup; |
Victor Stinner | b57f108 | 2011-05-26 00:19:38 +0200 | [diff] [blame] | 1599 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1600 | while (1) { |
| 1601 | if (data) { |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1602 | if (PyList_Append(chunks, data) < 0) |
| 1603 | goto cleanup; |
| 1604 | Py_CLEAR(data); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1605 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1606 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1607 | /* Read until EOF or until read() would block. */ |
| 1608 | data = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_read, NULL); |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1609 | if (data == NULL) |
| 1610 | goto cleanup; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1611 | if (data != Py_None && !PyBytes_Check(data)) { |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1612 | PyErr_SetString(PyExc_TypeError, "read() should return bytes"); |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1613 | goto cleanup; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1614 | } |
| 1615 | if (data == Py_None || PyBytes_GET_SIZE(data) == 0) { |
| 1616 | if (current_size == 0) { |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1617 | res = data; |
| 1618 | goto cleanup; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1619 | } |
| 1620 | else { |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1621 | tmp = _PyBytes_Join(_PyIO_empty_bytes, chunks); |
| 1622 | res = tmp; |
| 1623 | goto cleanup; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1624 | } |
| 1625 | } |
| 1626 | current_size += PyBytes_GET_SIZE(data); |
| 1627 | if (self->abs_pos != -1) |
| 1628 | self->abs_pos += PyBytes_GET_SIZE(data); |
| 1629 | } |
Richard Oudkerk | 9ad51ec | 2013-07-15 16:05:22 +0100 | [diff] [blame] | 1630 | cleanup: |
| 1631 | /* res is either NULL or a borrowed ref */ |
| 1632 | Py_XINCREF(res); |
| 1633 | Py_XDECREF(data); |
| 1634 | Py_XDECREF(tmp); |
| 1635 | Py_XDECREF(chunks); |
| 1636 | return res; |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1637 | } |
| 1638 | |
| 1639 | /* Read n bytes from the buffer if it can, otherwise return None. |
| 1640 | This function is simple enough that it can run unlocked. */ |
| 1641 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1642 | _bufferedreader_read_fast(buffered *self, Py_ssize_t n) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1643 | { |
| 1644 | Py_ssize_t current_size; |
| 1645 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1646 | current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1647 | if (n <= current_size) { |
| 1648 | /* Fast path: the data to read is fully buffered. */ |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1649 | PyObject *res = PyBytes_FromStringAndSize(self->buffer + self->pos, n); |
| 1650 | if (res != NULL) |
| 1651 | self->pos += n; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1652 | return res; |
| 1653 | } |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1654 | Py_RETURN_NONE; |
| 1655 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1656 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1657 | /* Generic read function: read from the stream until enough bytes are read, |
| 1658 | * or until an EOF occurs or until read() would block. |
| 1659 | */ |
| 1660 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1661 | _bufferedreader_read_generic(buffered *self, Py_ssize_t n) |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1662 | { |
| 1663 | PyObject *res = NULL; |
| 1664 | Py_ssize_t current_size, remaining, written; |
| 1665 | char *out; |
| 1666 | |
| 1667 | current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1668 | if (n <= current_size) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1669 | return _bufferedreader_read_fast(self, n); |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1670 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1671 | res = PyBytes_FromStringAndSize(NULL, n); |
| 1672 | if (res == NULL) |
| 1673 | goto error; |
| 1674 | out = PyBytes_AS_STRING(res); |
| 1675 | remaining = n; |
| 1676 | written = 0; |
| 1677 | if (current_size > 0) { |
| 1678 | memcpy(out, self->buffer + self->pos, current_size); |
| 1679 | remaining -= current_size; |
| 1680 | written += current_size; |
Antoine Pitrou | e05565e | 2011-08-20 14:39:23 +0200 | [diff] [blame] | 1681 | self->pos += current_size; |
| 1682 | } |
| 1683 | /* Flush the write buffer if necessary */ |
| 1684 | if (self->writable) { |
| 1685 | PyObject *r = buffered_flush_and_rewind_unlocked(self); |
| 1686 | if (r == NULL) |
| 1687 | goto error; |
| 1688 | Py_DECREF(r); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1689 | } |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1690 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1691 | while (remaining > 0) { |
| 1692 | /* We want to read a whole block at the end into buffer. |
| 1693 | If we had readv() we could do this in one pass. */ |
| 1694 | Py_ssize_t r = MINUS_LAST_BLOCK(self, remaining); |
| 1695 | if (r == 0) |
| 1696 | break; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1697 | r = _bufferedreader_raw_read(self, out + written, r); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1698 | if (r == -1) |
| 1699 | goto error; |
| 1700 | if (r == 0 || r == -2) { |
| 1701 | /* EOF occurred or read() would block. */ |
| 1702 | if (r == 0 || written > 0) { |
| 1703 | if (_PyBytes_Resize(&res, written)) |
| 1704 | goto error; |
| 1705 | return res; |
| 1706 | } |
| 1707 | Py_DECREF(res); |
| 1708 | Py_INCREF(Py_None); |
| 1709 | return Py_None; |
| 1710 | } |
| 1711 | remaining -= r; |
| 1712 | written += r; |
| 1713 | } |
| 1714 | assert(remaining <= self->buffer_size); |
| 1715 | self->pos = 0; |
| 1716 | self->raw_pos = 0; |
| 1717 | self->read_end = 0; |
Antoine Pitrou | 32cfede | 2010-08-11 13:31:33 +0000 | [diff] [blame] | 1718 | /* NOTE: when the read is satisfied, we avoid issuing any additional |
| 1719 | reads, which could block indefinitely (e.g. on a socket). |
| 1720 | See issue #9550. */ |
| 1721 | while (remaining > 0 && self->read_end < self->buffer_size) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1722 | Py_ssize_t r = _bufferedreader_fill_buffer(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1723 | if (r == -1) |
| 1724 | goto error; |
| 1725 | if (r == 0 || r == -2) { |
| 1726 | /* EOF occurred or read() would block. */ |
| 1727 | if (r == 0 || written > 0) { |
| 1728 | if (_PyBytes_Resize(&res, written)) |
| 1729 | goto error; |
| 1730 | return res; |
| 1731 | } |
| 1732 | Py_DECREF(res); |
| 1733 | Py_INCREF(Py_None); |
| 1734 | return Py_None; |
| 1735 | } |
| 1736 | if (remaining > r) { |
| 1737 | memcpy(out + written, self->buffer + self->pos, r); |
| 1738 | written += r; |
| 1739 | self->pos += r; |
| 1740 | remaining -= r; |
| 1741 | } |
| 1742 | else if (remaining > 0) { |
| 1743 | memcpy(out + written, self->buffer + self->pos, remaining); |
| 1744 | written += remaining; |
| 1745 | self->pos += remaining; |
| 1746 | remaining = 0; |
| 1747 | } |
| 1748 | if (remaining == 0) |
| 1749 | break; |
| 1750 | } |
| 1751 | |
| 1752 | return res; |
| 1753 | |
| 1754 | error: |
| 1755 | Py_XDECREF(res); |
| 1756 | return NULL; |
| 1757 | } |
| 1758 | |
| 1759 | static PyObject * |
Victor Stinner | bc93a11 | 2011-06-01 00:01:24 +0200 | [diff] [blame] | 1760 | _bufferedreader_peek_unlocked(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1761 | { |
| 1762 | Py_ssize_t have, r; |
| 1763 | |
| 1764 | have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| 1765 | /* Constraints: |
| 1766 | 1. we don't want to advance the file position. |
| 1767 | 2. we don't want to lose block alignment, so we can't shift the buffer |
| 1768 | to make some place. |
| 1769 | Therefore, we either return `have` bytes (if > 0), or a full buffer. |
| 1770 | */ |
| 1771 | if (have > 0) { |
| 1772 | return PyBytes_FromStringAndSize(self->buffer + self->pos, have); |
| 1773 | } |
| 1774 | |
| 1775 | /* 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] | 1776 | _bufferedreader_reset_buf(self); |
| 1777 | r = _bufferedreader_fill_buffer(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1778 | if (r == -1) |
| 1779 | return NULL; |
| 1780 | if (r == -2) |
| 1781 | r = 0; |
| 1782 | self->pos = 0; |
| 1783 | return PyBytes_FromStringAndSize(self->buffer, r); |
| 1784 | } |
| 1785 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1786 | static PyMethodDef bufferedreader_methods[] = { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1787 | /* BufferedIOMixin methods */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1788 | {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| 1789 | {"flush", (PyCFunction)buffered_simple_flush, METH_NOARGS}, |
| 1790 | {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| 1791 | {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| 1792 | {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| 1793 | {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| 1794 | {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| 1795 | {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 1796 | {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 1797 | {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1798 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1799 | {"read", (PyCFunction)buffered_read, METH_VARARGS}, |
| 1800 | {"peek", (PyCFunction)buffered_peek, METH_VARARGS}, |
| 1801 | {"read1", (PyCFunction)buffered_read1, METH_VARARGS}, |
Antoine Pitrou | 3486a98 | 2011-05-12 01:57:53 +0200 | [diff] [blame] | 1802 | {"readinto", (PyCFunction)buffered_readinto, METH_VARARGS}, |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 1803 | {"readinto1", (PyCFunction)buffered_readinto1, METH_VARARGS}, |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1804 | {"readline", (PyCFunction)buffered_readline, METH_VARARGS}, |
| 1805 | {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| 1806 | {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
| 1807 | {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
Antoine Pitrou | 10f0c50 | 2012-07-29 19:02:46 +0200 | [diff] [blame] | 1808 | {"__sizeof__", (PyCFunction)buffered_sizeof, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1809 | {NULL, NULL} |
| 1810 | }; |
| 1811 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1812 | static PyMemberDef bufferedreader_members[] = { |
Antoine Pitrou | 7f8f418 | 2010-12-21 21:20:59 +0000 | [diff] [blame] | 1813 | {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 1814 | {"_finalizing", T_BOOL, offsetof(buffered, finalizing), 0}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1815 | {NULL} |
| 1816 | }; |
| 1817 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1818 | static PyGetSetDef bufferedreader_getset[] = { |
| 1819 | {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| 1820 | {"name", (getter)buffered_name_get, NULL, NULL}, |
| 1821 | {"mode", (getter)buffered_mode_get, NULL, NULL}, |
Benjamin Peterson | 1fea321 | 2009-04-19 03:15:20 +0000 | [diff] [blame] | 1822 | {NULL} |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1823 | }; |
| 1824 | |
| 1825 | |
| 1826 | PyTypeObject PyBufferedReader_Type = { |
| 1827 | PyVarObject_HEAD_INIT(NULL, 0) |
| 1828 | "_io.BufferedReader", /*tp_name*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1829 | sizeof(buffered), /*tp_basicsize*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1830 | 0, /*tp_itemsize*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1831 | (destructor)buffered_dealloc, /*tp_dealloc*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1832 | 0, /*tp_print*/ |
| 1833 | 0, /*tp_getattr*/ |
| 1834 | 0, /*tp_setattr*/ |
| 1835 | 0, /*tp_compare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1836 | (reprfunc)buffered_repr, /*tp_repr*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1837 | 0, /*tp_as_number*/ |
| 1838 | 0, /*tp_as_sequence*/ |
| 1839 | 0, /*tp_as_mapping*/ |
| 1840 | 0, /*tp_hash */ |
| 1841 | 0, /*tp_call*/ |
| 1842 | 0, /*tp_str*/ |
| 1843 | 0, /*tp_getattro*/ |
| 1844 | 0, /*tp_setattro*/ |
| 1845 | 0, /*tp_as_buffer*/ |
| 1846 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 1847 | | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_HAVE_FINALIZE, /*tp_flags*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1848 | bufferedreader_doc, /* tp_doc */ |
| 1849 | (traverseproc)buffered_traverse, /* tp_traverse */ |
| 1850 | (inquiry)buffered_clear, /* tp_clear */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1851 | 0, /* tp_richcompare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1852 | offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1853 | 0, /* tp_iter */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1854 | (iternextfunc)buffered_iternext, /* tp_iternext */ |
| 1855 | bufferedreader_methods, /* tp_methods */ |
| 1856 | bufferedreader_members, /* tp_members */ |
| 1857 | bufferedreader_getset, /* tp_getset */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1858 | 0, /* tp_base */ |
| 1859 | 0, /* tp_dict */ |
| 1860 | 0, /* tp_descr_get */ |
| 1861 | 0, /* tp_descr_set */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1862 | offsetof(buffered, dict), /* tp_dictoffset */ |
| 1863 | (initproc)bufferedreader_init, /* tp_init */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1864 | 0, /* tp_alloc */ |
| 1865 | PyType_GenericNew, /* tp_new */ |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 1866 | 0, /* tp_free */ |
| 1867 | 0, /* tp_is_gc */ |
| 1868 | 0, /* tp_bases */ |
| 1869 | 0, /* tp_mro */ |
| 1870 | 0, /* tp_cache */ |
| 1871 | 0, /* tp_subclasses */ |
| 1872 | 0, /* tp_weaklist */ |
| 1873 | 0, /* tp_del */ |
| 1874 | 0, /* tp_version_tag */ |
| 1875 | 0, /* tp_finalize */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1876 | }; |
| 1877 | |
| 1878 | |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 1879 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1880 | /* |
| 1881 | * class BufferedWriter |
| 1882 | */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1883 | PyDoc_STRVAR(bufferedwriter_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1884 | "A buffer for a writeable sequential RawIO object.\n" |
| 1885 | "\n" |
| 1886 | "The constructor creates a BufferedWriter for the given writeable raw\n" |
| 1887 | "stream. If the buffer_size is not given, it defaults to\n" |
Florent Xicluna | 109d573 | 2012-07-07 17:03:22 +0200 | [diff] [blame] | 1888 | "DEFAULT_BUFFER_SIZE.\n" |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1889 | ); |
| 1890 | |
| 1891 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1892 | _bufferedwriter_reset_buf(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1893 | { |
| 1894 | self->write_pos = 0; |
| 1895 | self->write_end = -1; |
| 1896 | } |
| 1897 | |
| 1898 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1899 | bufferedwriter_init(buffered *self, PyObject *args, PyObject *kwds) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1900 | { |
Florent Xicluna | 109d573 | 2012-07-07 17:03:22 +0200 | [diff] [blame] | 1901 | char *kwlist[] = {"raw", "buffer_size", NULL}; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1902 | Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1903 | PyObject *raw; |
| 1904 | |
| 1905 | self->ok = 0; |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 1906 | self->detached = 0; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1907 | |
R David Murray | 9f10f56 | 2013-02-23 22:07:55 -0500 | [diff] [blame] | 1908 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|n:BufferedWriter", kwlist, |
Florent Xicluna | 109d573 | 2012-07-07 17:03:22 +0200 | [diff] [blame] | 1909 | &raw, &buffer_size)) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1910 | return -1; |
| 1911 | } |
| 1912 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1913 | if (_PyIOBase_check_writable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1914 | return -1; |
| 1915 | |
| 1916 | Py_CLEAR(self->raw); |
| 1917 | Py_INCREF(raw); |
| 1918 | self->raw = raw; |
| 1919 | self->readable = 0; |
| 1920 | self->writable = 1; |
| 1921 | |
| 1922 | self->buffer_size = buffer_size; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1923 | if (_buffered_init(self) < 0) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1924 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1925 | _bufferedwriter_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1926 | self->pos = 0; |
| 1927 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 1928 | self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedWriter_Type && |
| 1929 | Py_TYPE(raw) == &PyFileIO_Type); |
| 1930 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1931 | self->ok = 1; |
| 1932 | return 0; |
| 1933 | } |
| 1934 | |
| 1935 | static Py_ssize_t |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1936 | _bufferedwriter_raw_write(buffered *self, char *start, Py_ssize_t len) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1937 | { |
| 1938 | Py_buffer buf; |
| 1939 | PyObject *memobj, *res; |
| 1940 | Py_ssize_t n; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1941 | int errnum; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1942 | /* NOTE: the buffer needn't be released as its object is NULL. */ |
| 1943 | if (PyBuffer_FillInfo(&buf, NULL, start, len, 1, PyBUF_CONTIG_RO) == -1) |
| 1944 | return -1; |
| 1945 | memobj = PyMemoryView_FromBuffer(&buf); |
| 1946 | if (memobj == NULL) |
| 1947 | return -1; |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 1948 | /* NOTE: PyErr_SetFromErrno() calls PyErr_CheckSignals() when EINTR |
| 1949 | occurs so we needn't do it ourselves. |
| 1950 | We then retry writing, ignoring the signal if no handler has |
| 1951 | raised (see issue #10956). |
| 1952 | */ |
| 1953 | do { |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1954 | errno = 0; |
Antoine Pitrou | 707ce82 | 2011-02-25 21:24:11 +0000 | [diff] [blame] | 1955 | res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_write, memobj, NULL); |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1956 | errnum = errno; |
Gregory P. Smith | 5135992 | 2012-06-23 23:55:39 -0700 | [diff] [blame] | 1957 | } while (res == NULL && _PyIO_trap_eintr()); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1958 | Py_DECREF(memobj); |
| 1959 | if (res == NULL) |
| 1960 | return -1; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1961 | if (res == Py_None) { |
| 1962 | /* Non-blocking stream would have blocked. Special return code! |
| 1963 | Being paranoid we reset errno in case it is changed by code |
| 1964 | triggered by a decref. errno is used by _set_BlockingIOError(). */ |
| 1965 | Py_DECREF(res); |
| 1966 | errno = errnum; |
| 1967 | return -2; |
| 1968 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1969 | n = PyNumber_AsSsize_t(res, PyExc_ValueError); |
| 1970 | Py_DECREF(res); |
| 1971 | if (n < 0 || n > len) { |
| 1972 | PyErr_Format(PyExc_IOError, |
| 1973 | "raw write() returned invalid length %zd " |
| 1974 | "(should have been between 0 and %zd)", n, len); |
| 1975 | return -1; |
| 1976 | } |
| 1977 | if (n > 0 && self->abs_pos != -1) |
| 1978 | self->abs_pos += n; |
| 1979 | return n; |
| 1980 | } |
| 1981 | |
| 1982 | /* `restore_pos` is 1 if we need to restore the raw stream position at |
| 1983 | the end, 0 otherwise. */ |
| 1984 | static PyObject * |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 1985 | _bufferedwriter_flush_unlocked(buffered *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1986 | { |
| 1987 | Py_ssize_t written = 0; |
| 1988 | Py_off_t n, rewind; |
| 1989 | |
| 1990 | if (!VALID_WRITE_BUFFER(self) || self->write_pos == self->write_end) |
| 1991 | goto end; |
| 1992 | /* First, rewind */ |
| 1993 | rewind = RAW_OFFSET(self) + (self->pos - self->write_pos); |
| 1994 | if (rewind != 0) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 1995 | n = _buffered_raw_seek(self, -rewind, 1); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 1996 | if (n < 0) { |
| 1997 | goto error; |
| 1998 | } |
| 1999 | self->raw_pos -= rewind; |
| 2000 | } |
| 2001 | while (self->write_pos < self->write_end) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2002 | n = _bufferedwriter_raw_write(self, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2003 | self->buffer + self->write_pos, |
| 2004 | Py_SAFE_DOWNCAST(self->write_end - self->write_pos, |
| 2005 | Py_off_t, Py_ssize_t)); |
| 2006 | if (n == -1) { |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 2007 | goto error; |
| 2008 | } |
| 2009 | else if (n == -2) { |
| 2010 | _set_BlockingIOError("write could not complete without blocking", |
| 2011 | 0); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2012 | goto error; |
| 2013 | } |
| 2014 | self->write_pos += n; |
| 2015 | self->raw_pos = self->write_pos; |
| 2016 | written += Py_SAFE_DOWNCAST(n, Py_off_t, Py_ssize_t); |
Antoine Pitrou | b46b9d5 | 2010-08-21 19:09:32 +0000 | [diff] [blame] | 2017 | /* Partial writes can return successfully when interrupted by a |
| 2018 | signal (see write(2)). We must run signal handlers before |
| 2019 | blocking another time, possibly indefinitely. */ |
| 2020 | if (PyErr_CheckSignals() < 0) |
| 2021 | goto error; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2022 | } |
| 2023 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2024 | _bufferedwriter_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2025 | |
| 2026 | end: |
| 2027 | Py_RETURN_NONE; |
| 2028 | |
| 2029 | error: |
| 2030 | return NULL; |
| 2031 | } |
| 2032 | |
| 2033 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2034 | bufferedwriter_write(buffered *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2035 | { |
| 2036 | PyObject *res = NULL; |
| 2037 | Py_buffer buf; |
Amaury Forgeot d'Arc | e1b60d4 | 2009-10-05 21:09:00 +0000 | [diff] [blame] | 2038 | Py_ssize_t written, avail, remaining; |
| 2039 | Py_off_t offset; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2040 | |
| 2041 | CHECK_INITIALIZED(self) |
| 2042 | if (!PyArg_ParseTuple(args, "y*:write", &buf)) { |
| 2043 | return NULL; |
| 2044 | } |
| 2045 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 2046 | if (IS_CLOSED(self)) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2047 | PyErr_SetString(PyExc_ValueError, "write to closed file"); |
| 2048 | PyBuffer_Release(&buf); |
| 2049 | return NULL; |
| 2050 | } |
| 2051 | |
Antoine Pitrou | f3b68b3 | 2010-12-03 18:41:39 +0000 | [diff] [blame] | 2052 | if (!ENTER_BUFFERED(self)) { |
| 2053 | PyBuffer_Release(&buf); |
| 2054 | return NULL; |
| 2055 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2056 | |
| 2057 | /* Fast path: the data to write can be fully buffered. */ |
| 2058 | if (!VALID_READ_BUFFER(self) && !VALID_WRITE_BUFFER(self)) { |
| 2059 | self->pos = 0; |
| 2060 | self->raw_pos = 0; |
| 2061 | } |
| 2062 | avail = Py_SAFE_DOWNCAST(self->buffer_size - self->pos, Py_off_t, Py_ssize_t); |
| 2063 | if (buf.len <= avail) { |
| 2064 | memcpy(self->buffer + self->pos, buf.buf, buf.len); |
Antoine Pitrou | 7c40489 | 2011-05-13 00:13:33 +0200 | [diff] [blame] | 2065 | if (!VALID_WRITE_BUFFER(self) || self->write_pos > self->pos) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2066 | self->write_pos = self->pos; |
| 2067 | } |
| 2068 | ADJUST_POSITION(self, self->pos + buf.len); |
| 2069 | if (self->pos > self->write_end) |
| 2070 | self->write_end = self->pos; |
| 2071 | written = buf.len; |
| 2072 | goto end; |
| 2073 | } |
| 2074 | |
| 2075 | /* First write the current buffer */ |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 2076 | res = _bufferedwriter_flush_unlocked(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2077 | if (res == NULL) { |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2078 | Py_ssize_t *w = _buffered_check_blocking_error(); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2079 | if (w == NULL) |
| 2080 | goto error; |
| 2081 | if (self->readable) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2082 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2083 | /* Make some place by shifting the buffer. */ |
| 2084 | assert(VALID_WRITE_BUFFER(self)); |
| 2085 | memmove(self->buffer, self->buffer + self->write_pos, |
| 2086 | Py_SAFE_DOWNCAST(self->write_end - self->write_pos, |
| 2087 | Py_off_t, Py_ssize_t)); |
| 2088 | self->write_end -= self->write_pos; |
| 2089 | self->raw_pos -= self->write_pos; |
| 2090 | self->pos -= self->write_pos; |
| 2091 | self->write_pos = 0; |
| 2092 | avail = Py_SAFE_DOWNCAST(self->buffer_size - self->write_end, |
| 2093 | Py_off_t, Py_ssize_t); |
| 2094 | if (buf.len <= avail) { |
| 2095 | /* Everything can be buffered */ |
| 2096 | PyErr_Clear(); |
| 2097 | memcpy(self->buffer + self->write_end, buf.buf, buf.len); |
| 2098 | self->write_end += buf.len; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 2099 | self->pos += buf.len; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2100 | written = buf.len; |
| 2101 | goto end; |
| 2102 | } |
| 2103 | /* Buffer as much as possible. */ |
| 2104 | memcpy(self->buffer + self->write_end, buf.buf, avail); |
| 2105 | self->write_end += avail; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 2106 | self->pos += avail; |
| 2107 | /* XXX Modifying the existing exception e using the pointer w |
| 2108 | will change e.characters_written but not e.args[2]. |
| 2109 | Therefore we just replace with a new error. */ |
| 2110 | _set_BlockingIOError("write could not complete without blocking", |
| 2111 | avail); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2112 | goto error; |
| 2113 | } |
| 2114 | Py_CLEAR(res); |
| 2115 | |
Antoine Pitrou | a0ceb73 | 2009-08-06 20:29:56 +0000 | [diff] [blame] | 2116 | /* Adjust the raw stream position if it is away from the logical stream |
| 2117 | position. This happens if the read buffer has been filled but not |
| 2118 | modified (and therefore _bufferedwriter_flush_unlocked() didn't rewind |
| 2119 | the raw stream by itself). |
| 2120 | Fixes issue #6629. |
| 2121 | */ |
Amaury Forgeot d'Arc | e1b60d4 | 2009-10-05 21:09:00 +0000 | [diff] [blame] | 2122 | offset = RAW_OFFSET(self); |
| 2123 | if (offset != 0) { |
| 2124 | if (_buffered_raw_seek(self, -offset, 1) < 0) |
Antoine Pitrou | a0ceb73 | 2009-08-06 20:29:56 +0000 | [diff] [blame] | 2125 | goto error; |
Amaury Forgeot d'Arc | e1b60d4 | 2009-10-05 21:09:00 +0000 | [diff] [blame] | 2126 | self->raw_pos -= offset; |
Antoine Pitrou | a0ceb73 | 2009-08-06 20:29:56 +0000 | [diff] [blame] | 2127 | } |
| 2128 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2129 | /* Then write buf itself. At this point the buffer has been emptied. */ |
| 2130 | remaining = buf.len; |
| 2131 | written = 0; |
| 2132 | while (remaining > self->buffer_size) { |
Amaury Forgeot d'Arc | e1b60d4 | 2009-10-05 21:09:00 +0000 | [diff] [blame] | 2133 | Py_ssize_t n = _bufferedwriter_raw_write( |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2134 | self, (char *) buf.buf + written, buf.len - written); |
| 2135 | if (n == -1) { |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 2136 | goto error; |
| 2137 | } else if (n == -2) { |
| 2138 | /* Write failed because raw file is non-blocking */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2139 | if (remaining > self->buffer_size) { |
| 2140 | /* Can't buffer everything, still buffer as much as possible */ |
| 2141 | memcpy(self->buffer, |
| 2142 | (char *) buf.buf + written, self->buffer_size); |
| 2143 | self->raw_pos = 0; |
| 2144 | ADJUST_POSITION(self, self->buffer_size); |
| 2145 | self->write_end = self->buffer_size; |
Antoine Pitrou | 58fcf9f | 2011-11-21 20:16:44 +0100 | [diff] [blame] | 2146 | written += self->buffer_size; |
| 2147 | _set_BlockingIOError("write could not complete without " |
| 2148 | "blocking", written); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2149 | goto error; |
| 2150 | } |
| 2151 | PyErr_Clear(); |
| 2152 | break; |
| 2153 | } |
| 2154 | written += n; |
| 2155 | remaining -= n; |
Antoine Pitrou | b46b9d5 | 2010-08-21 19:09:32 +0000 | [diff] [blame] | 2156 | /* Partial writes can return successfully when interrupted by a |
| 2157 | signal (see write(2)). We must run signal handlers before |
| 2158 | blocking another time, possibly indefinitely. */ |
| 2159 | if (PyErr_CheckSignals() < 0) |
| 2160 | goto error; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2161 | } |
| 2162 | if (self->readable) |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2163 | _bufferedreader_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2164 | if (remaining > 0) { |
| 2165 | memcpy(self->buffer, (char *) buf.buf + written, remaining); |
| 2166 | written += remaining; |
| 2167 | } |
| 2168 | self->write_pos = 0; |
| 2169 | /* TODO: sanity check (remaining >= 0) */ |
| 2170 | self->write_end = remaining; |
| 2171 | ADJUST_POSITION(self, remaining); |
| 2172 | self->raw_pos = 0; |
| 2173 | |
| 2174 | end: |
| 2175 | res = PyLong_FromSsize_t(written); |
| 2176 | |
| 2177 | error: |
| 2178 | LEAVE_BUFFERED(self) |
| 2179 | PyBuffer_Release(&buf); |
| 2180 | return res; |
| 2181 | } |
| 2182 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2183 | static PyMethodDef bufferedwriter_methods[] = { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2184 | /* BufferedIOMixin methods */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2185 | {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| 2186 | {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| 2187 | {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| 2188 | {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| 2189 | {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| 2190 | {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| 2191 | {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 2192 | {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 2193 | {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2194 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2195 | {"write", (PyCFunction)bufferedwriter_write, METH_VARARGS}, |
| 2196 | {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
| 2197 | {"flush", (PyCFunction)buffered_flush, METH_NOARGS}, |
| 2198 | {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| 2199 | {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
Antoine Pitrou | 10f0c50 | 2012-07-29 19:02:46 +0200 | [diff] [blame] | 2200 | {"__sizeof__", (PyCFunction)buffered_sizeof, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2201 | {NULL, NULL} |
| 2202 | }; |
| 2203 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2204 | static PyMemberDef bufferedwriter_members[] = { |
Antoine Pitrou | 7f8f418 | 2010-12-21 21:20:59 +0000 | [diff] [blame] | 2205 | {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 2206 | {"_finalizing", T_BOOL, offsetof(buffered, finalizing), 0}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2207 | {NULL} |
| 2208 | }; |
| 2209 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2210 | static PyGetSetDef bufferedwriter_getset[] = { |
| 2211 | {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| 2212 | {"name", (getter)buffered_name_get, NULL, NULL}, |
| 2213 | {"mode", (getter)buffered_mode_get, NULL, NULL}, |
Benjamin Peterson | 1fea321 | 2009-04-19 03:15:20 +0000 | [diff] [blame] | 2214 | {NULL} |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2215 | }; |
| 2216 | |
| 2217 | |
| 2218 | PyTypeObject PyBufferedWriter_Type = { |
| 2219 | PyVarObject_HEAD_INIT(NULL, 0) |
| 2220 | "_io.BufferedWriter", /*tp_name*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2221 | sizeof(buffered), /*tp_basicsize*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2222 | 0, /*tp_itemsize*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2223 | (destructor)buffered_dealloc, /*tp_dealloc*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2224 | 0, /*tp_print*/ |
| 2225 | 0, /*tp_getattr*/ |
| 2226 | 0, /*tp_setattr*/ |
| 2227 | 0, /*tp_compare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2228 | (reprfunc)buffered_repr, /*tp_repr*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2229 | 0, /*tp_as_number*/ |
| 2230 | 0, /*tp_as_sequence*/ |
| 2231 | 0, /*tp_as_mapping*/ |
| 2232 | 0, /*tp_hash */ |
| 2233 | 0, /*tp_call*/ |
| 2234 | 0, /*tp_str*/ |
| 2235 | 0, /*tp_getattro*/ |
| 2236 | 0, /*tp_setattro*/ |
| 2237 | 0, /*tp_as_buffer*/ |
| 2238 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 2239 | | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_HAVE_FINALIZE, /*tp_flags*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2240 | bufferedwriter_doc, /* tp_doc */ |
| 2241 | (traverseproc)buffered_traverse, /* tp_traverse */ |
| 2242 | (inquiry)buffered_clear, /* tp_clear */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2243 | 0, /* tp_richcompare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2244 | offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2245 | 0, /* tp_iter */ |
| 2246 | 0, /* tp_iternext */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2247 | bufferedwriter_methods, /* tp_methods */ |
| 2248 | bufferedwriter_members, /* tp_members */ |
| 2249 | bufferedwriter_getset, /* tp_getset */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2250 | 0, /* tp_base */ |
| 2251 | 0, /* tp_dict */ |
| 2252 | 0, /* tp_descr_get */ |
| 2253 | 0, /* tp_descr_set */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2254 | offsetof(buffered, dict), /* tp_dictoffset */ |
| 2255 | (initproc)bufferedwriter_init, /* tp_init */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2256 | 0, /* tp_alloc */ |
| 2257 | PyType_GenericNew, /* tp_new */ |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 2258 | 0, /* tp_free */ |
| 2259 | 0, /* tp_is_gc */ |
| 2260 | 0, /* tp_bases */ |
| 2261 | 0, /* tp_mro */ |
| 2262 | 0, /* tp_cache */ |
| 2263 | 0, /* tp_subclasses */ |
| 2264 | 0, /* tp_weaklist */ |
| 2265 | 0, /* tp_del */ |
| 2266 | 0, /* tp_version_tag */ |
| 2267 | 0, /* tp_finalize */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2268 | }; |
| 2269 | |
| 2270 | |
| 2271 | |
| 2272 | /* |
| 2273 | * BufferedRWPair |
| 2274 | */ |
| 2275 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2276 | PyDoc_STRVAR(bufferedrwpair_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2277 | "A buffered reader and writer object together.\n" |
| 2278 | "\n" |
| 2279 | "A buffered reader object and buffered writer object put together to\n" |
| 2280 | "form a sequential IO object that can read and write. This is typically\n" |
| 2281 | "used with a socket or two-way pipe.\n" |
| 2282 | "\n" |
| 2283 | "reader and writer are RawIOBase objects that are readable and\n" |
| 2284 | "writeable respectively. If the buffer_size is omitted it defaults to\n" |
Benjamin Peterson | 59406a9 | 2009-03-26 17:10:29 +0000 | [diff] [blame] | 2285 | "DEFAULT_BUFFER_SIZE.\n" |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2286 | ); |
| 2287 | |
| 2288 | /* XXX The usefulness of this (compared to having two separate IO objects) is |
| 2289 | * questionable. |
| 2290 | */ |
| 2291 | |
| 2292 | typedef struct { |
| 2293 | PyObject_HEAD |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2294 | buffered *reader; |
| 2295 | buffered *writer; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2296 | PyObject *dict; |
| 2297 | PyObject *weakreflist; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2298 | } rwpair; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2299 | |
| 2300 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2301 | bufferedrwpair_init(rwpair *self, PyObject *args, PyObject *kwds) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2302 | { |
| 2303 | PyObject *reader, *writer; |
| 2304 | Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2305 | |
Florent Xicluna | 109d573 | 2012-07-07 17:03:22 +0200 | [diff] [blame] | 2306 | if (!PyArg_ParseTuple(args, "OO|n:BufferedRWPair", &reader, &writer, |
| 2307 | &buffer_size)) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2308 | return -1; |
| 2309 | } |
| 2310 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2311 | if (_PyIOBase_check_readable(reader, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2312 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2313 | if (_PyIOBase_check_writable(writer, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2314 | return -1; |
| 2315 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2316 | self->reader = (buffered *) PyObject_CallFunction( |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2317 | (PyObject *) &PyBufferedReader_Type, "On", reader, buffer_size); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2318 | if (self->reader == NULL) |
| 2319 | return -1; |
| 2320 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2321 | self->writer = (buffered *) PyObject_CallFunction( |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2322 | (PyObject *) &PyBufferedWriter_Type, "On", writer, buffer_size); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2323 | if (self->writer == NULL) { |
| 2324 | Py_CLEAR(self->reader); |
| 2325 | return -1; |
| 2326 | } |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2327 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2328 | return 0; |
| 2329 | } |
| 2330 | |
| 2331 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2332 | bufferedrwpair_traverse(rwpair *self, visitproc visit, void *arg) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2333 | { |
| 2334 | Py_VISIT(self->dict); |
| 2335 | return 0; |
| 2336 | } |
| 2337 | |
| 2338 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2339 | bufferedrwpair_clear(rwpair *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2340 | { |
| 2341 | Py_CLEAR(self->reader); |
| 2342 | Py_CLEAR(self->writer); |
| 2343 | Py_CLEAR(self->dict); |
| 2344 | return 0; |
| 2345 | } |
| 2346 | |
| 2347 | static void |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2348 | bufferedrwpair_dealloc(rwpair *self) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2349 | { |
| 2350 | _PyObject_GC_UNTRACK(self); |
Benjamin Peterson | bbd0a32 | 2014-09-29 22:46:57 -0400 | [diff] [blame] | 2351 | if (self->weakreflist != NULL) |
| 2352 | PyObject_ClearWeakRefs((PyObject *)self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2353 | Py_CLEAR(self->reader); |
| 2354 | Py_CLEAR(self->writer); |
| 2355 | Py_CLEAR(self->dict); |
| 2356 | Py_TYPE(self)->tp_free((PyObject *) self); |
| 2357 | } |
| 2358 | |
| 2359 | static PyObject * |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2360 | _forward_call(buffered *self, _Py_Identifier *name, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2361 | { |
Serhiy Storchaka | 61e2493 | 2014-02-12 10:52:35 +0200 | [diff] [blame] | 2362 | PyObject *func, *ret; |
| 2363 | if (self == NULL) { |
| 2364 | PyErr_SetString(PyExc_ValueError, |
| 2365 | "I/O operation on uninitialized object"); |
| 2366 | return NULL; |
| 2367 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2368 | |
Serhiy Storchaka | 61e2493 | 2014-02-12 10:52:35 +0200 | [diff] [blame] | 2369 | func = _PyObject_GetAttrId((PyObject *)self, name); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2370 | if (func == NULL) { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2371 | PyErr_SetString(PyExc_AttributeError, name->string); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2372 | return NULL; |
| 2373 | } |
| 2374 | |
| 2375 | ret = PyObject_CallObject(func, args); |
| 2376 | Py_DECREF(func); |
| 2377 | return ret; |
| 2378 | } |
| 2379 | |
| 2380 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2381 | bufferedrwpair_read(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2382 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2383 | return _forward_call(self->reader, &PyId_read, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2384 | } |
| 2385 | |
| 2386 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2387 | bufferedrwpair_peek(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2388 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2389 | return _forward_call(self->reader, &PyId_peek, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2390 | } |
| 2391 | |
| 2392 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2393 | bufferedrwpair_read1(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2394 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2395 | return _forward_call(self->reader, &PyId_read1, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2396 | } |
| 2397 | |
| 2398 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2399 | bufferedrwpair_readinto(rwpair *self, PyObject *args) |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2400 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2401 | return _forward_call(self->reader, &PyId_readinto, args); |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2402 | } |
| 2403 | |
| 2404 | static PyObject * |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 2405 | bufferedrwpair_readinto1(rwpair *self, PyObject *args) |
| 2406 | { |
| 2407 | return _forward_call(self->reader, &PyId_readinto1, args); |
| 2408 | } |
| 2409 | |
| 2410 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2411 | bufferedrwpair_write(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2412 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2413 | return _forward_call(self->writer, &PyId_write, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2414 | } |
| 2415 | |
| 2416 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2417 | bufferedrwpair_flush(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2418 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2419 | return _forward_call(self->writer, &PyId_flush, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2420 | } |
| 2421 | |
| 2422 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2423 | bufferedrwpair_readable(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2424 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2425 | return _forward_call(self->reader, &PyId_readable, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2426 | } |
| 2427 | |
| 2428 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2429 | bufferedrwpair_writable(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2430 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2431 | return _forward_call(self->writer, &PyId_writable, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2432 | } |
| 2433 | |
| 2434 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2435 | bufferedrwpair_close(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2436 | { |
Serhiy Storchaka | 7665be6 | 2015-03-24 23:21:57 +0200 | [diff] [blame] | 2437 | PyObject *exc = NULL, *val, *tb; |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2438 | PyObject *ret = _forward_call(self->writer, &PyId_close, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2439 | if (ret == NULL) |
Serhiy Storchaka | 7665be6 | 2015-03-24 23:21:57 +0200 | [diff] [blame] | 2440 | PyErr_Fetch(&exc, &val, &tb); |
| 2441 | else |
| 2442 | Py_DECREF(ret); |
| 2443 | ret = _forward_call(self->reader, &PyId_close, args); |
| 2444 | if (exc != NULL) { |
| 2445 | _PyErr_ChainExceptions(exc, val, tb); |
| 2446 | Py_CLEAR(ret); |
| 2447 | } |
| 2448 | return ret; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2449 | } |
| 2450 | |
| 2451 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2452 | bufferedrwpair_isatty(rwpair *self, PyObject *args) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2453 | { |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2454 | PyObject *ret = _forward_call(self->writer, &PyId_isatty, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2455 | |
| 2456 | if (ret != Py_False) { |
| 2457 | /* either True or exception */ |
| 2458 | return ret; |
| 2459 | } |
| 2460 | Py_DECREF(ret); |
| 2461 | |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 2462 | return _forward_call(self->reader, &PyId_isatty, args); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2463 | } |
| 2464 | |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2465 | static PyObject * |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2466 | bufferedrwpair_closed_get(rwpair *self, void *context) |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2467 | { |
Charles-François Natali | 42c28cd | 2011-10-05 19:53:43 +0200 | [diff] [blame] | 2468 | if (self->writer == NULL) { |
| 2469 | PyErr_SetString(PyExc_RuntimeError, |
| 2470 | "the BufferedRWPair object is being garbage-collected"); |
| 2471 | return NULL; |
| 2472 | } |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2473 | return PyObject_GetAttr((PyObject *) self->writer, _PyIO_str_closed); |
| 2474 | } |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2475 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2476 | static PyMethodDef bufferedrwpair_methods[] = { |
| 2477 | {"read", (PyCFunction)bufferedrwpair_read, METH_VARARGS}, |
| 2478 | {"peek", (PyCFunction)bufferedrwpair_peek, METH_VARARGS}, |
| 2479 | {"read1", (PyCFunction)bufferedrwpair_read1, METH_VARARGS}, |
| 2480 | {"readinto", (PyCFunction)bufferedrwpair_readinto, METH_VARARGS}, |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 2481 | {"readinto1", (PyCFunction)bufferedrwpair_readinto1, METH_VARARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2482 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2483 | {"write", (PyCFunction)bufferedrwpair_write, METH_VARARGS}, |
| 2484 | {"flush", (PyCFunction)bufferedrwpair_flush, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2485 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2486 | {"readable", (PyCFunction)bufferedrwpair_readable, METH_NOARGS}, |
| 2487 | {"writable", (PyCFunction)bufferedrwpair_writable, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2488 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2489 | {"close", (PyCFunction)bufferedrwpair_close, METH_NOARGS}, |
| 2490 | {"isatty", (PyCFunction)bufferedrwpair_isatty, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2491 | |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 2492 | {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
| 2493 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2494 | {NULL, NULL} |
| 2495 | }; |
| 2496 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2497 | static PyGetSetDef bufferedrwpair_getset[] = { |
| 2498 | {"closed", (getter)bufferedrwpair_closed_get, NULL, NULL}, |
Benjamin Peterson | 1fea321 | 2009-04-19 03:15:20 +0000 | [diff] [blame] | 2499 | {NULL} |
Antoine Pitrou | cf4c749 | 2009-04-19 00:09:36 +0000 | [diff] [blame] | 2500 | }; |
| 2501 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2502 | PyTypeObject PyBufferedRWPair_Type = { |
| 2503 | PyVarObject_HEAD_INIT(NULL, 0) |
| 2504 | "_io.BufferedRWPair", /*tp_name*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2505 | sizeof(rwpair), /*tp_basicsize*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2506 | 0, /*tp_itemsize*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2507 | (destructor)bufferedrwpair_dealloc, /*tp_dealloc*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2508 | 0, /*tp_print*/ |
| 2509 | 0, /*tp_getattr*/ |
| 2510 | 0, /*tp_setattr*/ |
| 2511 | 0, /*tp_compare */ |
| 2512 | 0, /*tp_repr*/ |
| 2513 | 0, /*tp_as_number*/ |
| 2514 | 0, /*tp_as_sequence*/ |
| 2515 | 0, /*tp_as_mapping*/ |
| 2516 | 0, /*tp_hash */ |
| 2517 | 0, /*tp_call*/ |
| 2518 | 0, /*tp_str*/ |
| 2519 | 0, /*tp_getattro*/ |
| 2520 | 0, /*tp_setattro*/ |
| 2521 | 0, /*tp_as_buffer*/ |
| 2522 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 2523 | | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_HAVE_FINALIZE, /* tp_flags */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2524 | bufferedrwpair_doc, /* tp_doc */ |
| 2525 | (traverseproc)bufferedrwpair_traverse, /* tp_traverse */ |
| 2526 | (inquiry)bufferedrwpair_clear, /* tp_clear */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2527 | 0, /* tp_richcompare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2528 | offsetof(rwpair, weakreflist), /*tp_weaklistoffset*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2529 | 0, /* tp_iter */ |
| 2530 | 0, /* tp_iternext */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2531 | bufferedrwpair_methods, /* tp_methods */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2532 | 0, /* tp_members */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2533 | bufferedrwpair_getset, /* tp_getset */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2534 | 0, /* tp_base */ |
| 2535 | 0, /* tp_dict */ |
| 2536 | 0, /* tp_descr_get */ |
| 2537 | 0, /* tp_descr_set */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2538 | offsetof(rwpair, dict), /* tp_dictoffset */ |
| 2539 | (initproc)bufferedrwpair_init, /* tp_init */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2540 | 0, /* tp_alloc */ |
| 2541 | PyType_GenericNew, /* tp_new */ |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 2542 | 0, /* tp_free */ |
| 2543 | 0, /* tp_is_gc */ |
| 2544 | 0, /* tp_bases */ |
| 2545 | 0, /* tp_mro */ |
| 2546 | 0, /* tp_cache */ |
| 2547 | 0, /* tp_subclasses */ |
| 2548 | 0, /* tp_weaklist */ |
| 2549 | 0, /* tp_del */ |
| 2550 | 0, /* tp_version_tag */ |
| 2551 | 0, /* tp_finalize */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2552 | }; |
| 2553 | |
| 2554 | |
| 2555 | |
| 2556 | /* |
| 2557 | * BufferedRandom |
| 2558 | */ |
| 2559 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2560 | PyDoc_STRVAR(bufferedrandom_doc, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2561 | "A buffered interface to random access streams.\n" |
| 2562 | "\n" |
| 2563 | "The constructor creates a reader and writer for a seekable stream,\n" |
| 2564 | "raw, given in the first argument. If the buffer_size is omitted it\n" |
Florent Xicluna | 109d573 | 2012-07-07 17:03:22 +0200 | [diff] [blame] | 2565 | "defaults to DEFAULT_BUFFER_SIZE.\n" |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2566 | ); |
| 2567 | |
| 2568 | static int |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2569 | bufferedrandom_init(buffered *self, PyObject *args, PyObject *kwds) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2570 | { |
Florent Xicluna | 109d573 | 2012-07-07 17:03:22 +0200 | [diff] [blame] | 2571 | char *kwlist[] = {"raw", "buffer_size", NULL}; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2572 | Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2573 | PyObject *raw; |
| 2574 | |
| 2575 | self->ok = 0; |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 2576 | self->detached = 0; |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2577 | |
R David Murray | 9f10f56 | 2013-02-23 22:07:55 -0500 | [diff] [blame] | 2578 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|n:BufferedRandom", kwlist, |
Florent Xicluna | 109d573 | 2012-07-07 17:03:22 +0200 | [diff] [blame] | 2579 | &raw, &buffer_size)) { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2580 | return -1; |
| 2581 | } |
| 2582 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2583 | if (_PyIOBase_check_seekable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2584 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2585 | if (_PyIOBase_check_readable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2586 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2587 | if (_PyIOBase_check_writable(raw, Py_True) == NULL) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2588 | return -1; |
| 2589 | |
| 2590 | Py_CLEAR(self->raw); |
| 2591 | Py_INCREF(raw); |
| 2592 | self->raw = raw; |
| 2593 | self->buffer_size = buffer_size; |
| 2594 | self->readable = 1; |
| 2595 | self->writable = 1; |
| 2596 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2597 | if (_buffered_init(self) < 0) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2598 | return -1; |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2599 | _bufferedreader_reset_buf(self); |
| 2600 | _bufferedwriter_reset_buf(self); |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2601 | self->pos = 0; |
| 2602 | |
Antoine Pitrou | 711af3a | 2009-04-11 15:39:24 +0000 | [diff] [blame] | 2603 | self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedRandom_Type && |
| 2604 | Py_TYPE(raw) == &PyFileIO_Type); |
| 2605 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2606 | self->ok = 1; |
| 2607 | return 0; |
| 2608 | } |
| 2609 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2610 | static PyMethodDef bufferedrandom_methods[] = { |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2611 | /* BufferedIOMixin methods */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2612 | {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| 2613 | {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| 2614 | {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| 2615 | {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| 2616 | {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| 2617 | {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| 2618 | {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
Antoine Pitrou | e033e06 | 2010-10-29 10:38:18 +0000 | [diff] [blame] | 2619 | {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
Antoine Pitrou | 243757e | 2010-11-05 21:15:39 +0000 | [diff] [blame] | 2620 | {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2621 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2622 | {"flush", (PyCFunction)buffered_flush, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2623 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2624 | {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| 2625 | {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
| 2626 | {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
| 2627 | {"read", (PyCFunction)buffered_read, METH_VARARGS}, |
| 2628 | {"read1", (PyCFunction)buffered_read1, METH_VARARGS}, |
| 2629 | {"readinto", (PyCFunction)buffered_readinto, METH_VARARGS}, |
Benjamin Peterson | a96fea0 | 2014-06-22 14:17:44 -0700 | [diff] [blame] | 2630 | {"readinto1", (PyCFunction)buffered_readinto1, METH_VARARGS}, |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2631 | {"readline", (PyCFunction)buffered_readline, METH_VARARGS}, |
| 2632 | {"peek", (PyCFunction)buffered_peek, METH_VARARGS}, |
| 2633 | {"write", (PyCFunction)bufferedwriter_write, METH_VARARGS}, |
Antoine Pitrou | 10f0c50 | 2012-07-29 19:02:46 +0200 | [diff] [blame] | 2634 | {"__sizeof__", (PyCFunction)buffered_sizeof, METH_NOARGS}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2635 | {NULL, NULL} |
| 2636 | }; |
| 2637 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2638 | static PyMemberDef bufferedrandom_members[] = { |
Antoine Pitrou | 7f8f418 | 2010-12-21 21:20:59 +0000 | [diff] [blame] | 2639 | {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 2640 | {"_finalizing", T_BOOL, offsetof(buffered, finalizing), 0}, |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2641 | {NULL} |
| 2642 | }; |
| 2643 | |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2644 | static PyGetSetDef bufferedrandom_getset[] = { |
| 2645 | {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| 2646 | {"name", (getter)buffered_name_get, NULL, NULL}, |
| 2647 | {"mode", (getter)buffered_mode_get, NULL, NULL}, |
Benjamin Peterson | 1fea321 | 2009-04-19 03:15:20 +0000 | [diff] [blame] | 2648 | {NULL} |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2649 | }; |
| 2650 | |
| 2651 | |
| 2652 | PyTypeObject PyBufferedRandom_Type = { |
| 2653 | PyVarObject_HEAD_INIT(NULL, 0) |
| 2654 | "_io.BufferedRandom", /*tp_name*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2655 | sizeof(buffered), /*tp_basicsize*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2656 | 0, /*tp_itemsize*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2657 | (destructor)buffered_dealloc, /*tp_dealloc*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2658 | 0, /*tp_print*/ |
| 2659 | 0, /*tp_getattr*/ |
| 2660 | 0, /*tp_setattr*/ |
| 2661 | 0, /*tp_compare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2662 | (reprfunc)buffered_repr, /*tp_repr*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2663 | 0, /*tp_as_number*/ |
| 2664 | 0, /*tp_as_sequence*/ |
| 2665 | 0, /*tp_as_mapping*/ |
| 2666 | 0, /*tp_hash */ |
| 2667 | 0, /*tp_call*/ |
| 2668 | 0, /*tp_str*/ |
| 2669 | 0, /*tp_getattro*/ |
| 2670 | 0, /*tp_setattro*/ |
| 2671 | 0, /*tp_as_buffer*/ |
| 2672 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 2673 | | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_HAVE_FINALIZE, /*tp_flags*/ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2674 | bufferedrandom_doc, /* tp_doc */ |
| 2675 | (traverseproc)buffered_traverse, /* tp_traverse */ |
| 2676 | (inquiry)buffered_clear, /* tp_clear */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2677 | 0, /* tp_richcompare */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2678 | offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2679 | 0, /* tp_iter */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2680 | (iternextfunc)buffered_iternext, /* tp_iternext */ |
| 2681 | bufferedrandom_methods, /* tp_methods */ |
| 2682 | bufferedrandom_members, /* tp_members */ |
| 2683 | bufferedrandom_getset, /* tp_getset */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2684 | 0, /* tp_base */ |
| 2685 | 0, /*tp_dict*/ |
| 2686 | 0, /* tp_descr_get */ |
| 2687 | 0, /* tp_descr_set */ |
Benjamin Peterson | 680bf1a | 2009-06-12 02:07:12 +0000 | [diff] [blame] | 2688 | offsetof(buffered, dict), /*tp_dictoffset*/ |
| 2689 | (initproc)bufferedrandom_init, /* tp_init */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2690 | 0, /* tp_alloc */ |
| 2691 | PyType_GenericNew, /* tp_new */ |
Antoine Pitrou | 796564c | 2013-07-30 19:59:21 +0200 | [diff] [blame] | 2692 | 0, /* tp_free */ |
| 2693 | 0, /* tp_is_gc */ |
| 2694 | 0, /* tp_bases */ |
| 2695 | 0, /* tp_mro */ |
| 2696 | 0, /* tp_cache */ |
| 2697 | 0, /* tp_subclasses */ |
| 2698 | 0, /* tp_weaklist */ |
| 2699 | 0, /* tp_del */ |
| 2700 | 0, /* tp_version_tag */ |
| 2701 | 0, /* tp_finalize */ |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 2702 | }; |