1 /* 2 * Declarations shared between the different parts of the io module 3 */ 4 5 /* ABCs */ 6 extern PyTypeObject PyIOBase_Type; 7 extern PyTypeObject PyRawIOBase_Type; 8 extern PyTypeObject PyBufferedIOBase_Type; 9 extern PyTypeObject PyTextIOBase_Type; 10 11 /* Concrete classes */ 12 extern PyTypeObject PyFileIO_Type; 13 extern PyTypeObject PyBytesIO_Type; 14 extern PyTypeObject PyStringIO_Type; 15 extern PyTypeObject PyBufferedReader_Type; 16 extern PyTypeObject PyBufferedWriter_Type; 17 extern PyTypeObject PyBufferedRWPair_Type; 18 extern PyTypeObject PyBufferedRandom_Type; 19 extern PyTypeObject PyTextIOWrapper_Type; 20 extern PyTypeObject PyIncrementalNewlineDecoder_Type; 21 22 23 extern int _PyIO_ConvertSsize_t(PyObject *, void *); 24 25 /* These functions are used as METH_NOARGS methods, are normally called 26 * with args=NULL, and return a new reference. 27 * BUT when args=Py_True is passed, they return a borrowed reference. 28 */ 29 extern PyObject* _PyIOBase_check_readable(PyObject *self, PyObject *args); 30 extern PyObject* _PyIOBase_check_writable(PyObject *self, PyObject *args); 31 extern PyObject* _PyIOBase_check_seekable(PyObject *self, PyObject *args); 32 extern PyObject* _PyIOBase_check_closed(PyObject *self, PyObject *args); 33 34 /* Helper for finalization. 35 This function will revive an object ready to be deallocated and try to 36 close() it. It returns 0 if the object can be destroyed, or -1 if it 37 is alive again. */ 38 extern int _PyIOBase_finalize(PyObject *self); 39 40 /* Returns true if the given FileIO object is closed. 41 Doesn't check the argument type, so be careful! */ 42 extern int _PyFileIO_closed(PyObject *self); 43 44 /* Shortcut to the core of the IncrementalNewlineDecoder.decode method */ 45 extern PyObject *_PyIncrementalNewlineDecoder_decode( 46 PyObject *self, PyObject *input, int final); 47 48 /* Finds the first line ending between `start` and `end`. 49 If found, returns the index after the line ending and doesn't touch 50 `*consumed`. 51 If not found, returns -1 and sets `*consumed` to the number of characters 52 which can be safely put aside until another search. 53 54 NOTE: for performance reasons, `end` must point to a NUL character ('\0'). 55 Otherwise, the function will scan further and return garbage. */ 56 extern Py_ssize_t _PyIO_find_line_ending( 57 int translated, int universal, PyObject *readnl, 58 Py_UNICODE *start, Py_UNICODE *end, Py_ssize_t *consumed); 59 60 61 #define DEFAULT_BUFFER_SIZE (8 * 1024) /* bytes */ 62 63 typedef struct { 64 /* This is the equivalent of PyException_HEAD in 3.x */ 65 PyObject_HEAD 66 PyObject *dict; 67 PyObject *args; 68 PyObject *message; 69 70 PyObject *myerrno; 71 PyObject *strerror; 72 PyObject *filename; /* Not used, but part of the IOError object */ 73 Py_ssize_t written; 74 } PyBlockingIOErrorObject; 75 PyAPI_DATA(PyObject *) PyExc_BlockingIOError; 76 77 /* 78 * Offset type for positioning. 79 */ 80 81 /* Printing a variable of type off_t (with e.g., PyString_FromFormat) 82 correctly and without producing compiler warnings is surprisingly painful. 83 We identify an integer type whose size matches off_t and then: (1) cast the 84 off_t to that integer type and (2) use the appropriate conversion 85 specification. The cast is necessary: gcc complains about formatting a 86 long with "%lld" even when both long and long long have the same 87 precision. */ 88 89 #if defined(MS_WIN64) || defined(MS_WINDOWS) 90 91 /* Windows uses long long for offsets */ 92 typedef PY_LONG_LONG Py_off_t; 93 # define PyLong_AsOff_t PyLong_AsLongLong 94 # define PyLong_FromOff_t PyLong_FromLongLong 95 # define PY_OFF_T_MAX PY_LLONG_MAX 96 # define PY_OFF_T_MIN PY_LLONG_MIN 97 # define PY_OFF_T_COMPAT PY_LONG_LONG /* type compatible with off_t */ 98 # define PY_PRIdOFF "lld" /* format to use for that type */ 99 100 #else 101 102 /* Other platforms use off_t */ 103 typedef off_t Py_off_t; 104 #if (SIZEOF_OFF_T == SIZEOF_SIZE_T) 105 # define PyLong_AsOff_t PyLong_AsSsize_t 106 # define PyLong_FromOff_t PyLong_FromSsize_t 107 # define PY_OFF_T_MAX PY_SSIZE_T_MAX 108 # define PY_OFF_T_MIN PY_SSIZE_T_MIN 109 # define PY_OFF_T_COMPAT Py_ssize_t 110 # define PY_PRIdOFF "zd" 111 #elif (HAVE_LONG_LONG && SIZEOF_OFF_T == SIZEOF_LONG_LONG) 112 # define PyLong_AsOff_t PyLong_AsLongLong 113 # define PyLong_FromOff_t PyLong_FromLongLong 114 # define PY_OFF_T_MAX PY_LLONG_MAX 115 # define PY_OFF_T_MIN PY_LLONG_MIN 116 # define PY_OFF_T_COMPAT PY_LONG_LONG 117 # define PY_PRIdOFF "lld" 118 #elif (SIZEOF_OFF_T == SIZEOF_LONG) 119 # define PyLong_AsOff_t PyLong_AsLong 120 # define PyLong_FromOff_t PyLong_FromLong 121 # define PY_OFF_T_MAX LONG_MAX 122 # define PY_OFF_T_MIN LONG_MIN 123 # define PY_OFF_T_COMPAT long 124 # define PY_PRIdOFF "ld" 125 #else 126 # error off_t does not match either size_t, long, or long long! 127 #endif 128 129 #endif 130 131 extern Py_off_t PyNumber_AsOff_t(PyObject *item, PyObject *err); 132 133 /* Implementation details */ 134 135 extern PyObject *_PyIO_os_module; 136 extern PyObject *_PyIO_locale_module; 137 extern PyObject *_PyIO_unsupported_operation; 138 139 extern PyObject *_PyIO_str_close; 140 extern PyObject *_PyIO_str_closed; 141 extern PyObject *_PyIO_str_decode; 142 extern PyObject *_PyIO_str_encode; 143 extern PyObject *_PyIO_str_fileno; 144 extern PyObject *_PyIO_str_flush; 145 extern PyObject *_PyIO_str_getstate; 146 extern PyObject *_PyIO_str_isatty; 147 extern PyObject *_PyIO_str_newlines; 148 extern PyObject *_PyIO_str_nl; 149 extern PyObject *_PyIO_str_read; 150 extern PyObject *_PyIO_str_read1; 151 extern PyObject *_PyIO_str_readable; 152 extern PyObject *_PyIO_str_readinto; 153 extern PyObject *_PyIO_str_readline; 154 extern PyObject *_PyIO_str_reset; 155 extern PyObject *_PyIO_str_seek; 156 extern PyObject *_PyIO_str_seekable; 157 extern PyObject *_PyIO_str_setstate; 158 extern PyObject *_PyIO_str_tell; 159 extern PyObject *_PyIO_str_truncate; 160 extern PyObject *_PyIO_str_writable; 161 extern PyObject *_PyIO_str_write; 162 163 extern PyObject *_PyIO_empty_str; 164 extern PyObject *_PyIO_empty_bytes; 165 extern PyObject *_PyIO_zero; 166
