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 #ifndef Py_LIMITED_API 23 #ifdef MS_WINDOWS 24 extern PyTypeObject PyWindowsConsoleIO_Type; 25 PyAPI_DATA(PyObject *) _PyWindowsConsoleIO_Type; 26 #define PyWindowsConsoleIO_Check(op) (PyObject_TypeCheck((op), (PyTypeObject*)_PyWindowsConsoleIO_Type)) 27 #endif /* MS_WINDOWS */ 28 #endif /* Py_LIMITED_API */ 29 30 extern int _PyIO_ConvertSsize_t(PyObject *, void *); 31 32 /* These functions are used as METH_NOARGS methods, are normally called 33 * with args=NULL, and return a new reference. 34 * BUT when args=Py_True is passed, they return a borrowed reference. 35 */ 36 extern PyObject* _PyIOBase_check_readable(PyObject *self, PyObject *args); 37 extern PyObject* _PyIOBase_check_writable(PyObject *self, PyObject *args); 38 extern PyObject* _PyIOBase_check_seekable(PyObject *self, PyObject *args); 39 extern PyObject* _PyIOBase_check_closed(PyObject *self, PyObject *args); 40 41 /* Helper for finalization. 42 This function will revive an object ready to be deallocated and try to 43 close() it. It returns 0 if the object can be destroyed, or -1 if it 44 is alive again. */ 45 extern int _PyIOBase_finalize(PyObject *self); 46 47 /* Returns true if the given FileIO object is closed. 48 Doesn't check the argument type, so be careful! */ 49 extern int _PyFileIO_closed(PyObject *self); 50 51 /* Shortcut to the core of the IncrementalNewlineDecoder.decode method */ 52 extern PyObject *_PyIncrementalNewlineDecoder_decode( 53 PyObject *self, PyObject *input, int final); 54 55 /* Finds the first line ending between `start` and `end`. 56 If found, returns the index after the line ending and doesn't touch 57 `*consumed`. 58 If not found, returns -1 and sets `*consumed` to the number of characters 59 which can be safely put aside until another search. 60 61 NOTE: for performance reasons, `end` must point to a NUL character ('\0'). 62 Otherwise, the function will scan further and return garbage. 63 64 There are three modes, in order of priority: 65 * translated: Only find \n (assume newlines already translated) 66 * universal: Use universal newlines algorithm 67 * Otherwise, the line ending is specified by readnl, a str object */ 68 extern Py_ssize_t _PyIO_find_line_ending( 69 int translated, int universal, PyObject *readnl, 70 int kind, const char *start, const char *end, Py_ssize_t *consumed); 71 72 /* Return 1 if an EnvironmentError with errno == EINTR is set (and then 73 clears the error indicator), 0 otherwise. 74 Should only be called when PyErr_Occurred() is true. 75 */ 76 extern int _PyIO_trap_eintr(void); 77 78 #define DEFAULT_BUFFER_SIZE (8 * 1024) /* bytes */ 79 80 /* 81 * Offset type for positioning. 82 */ 83 84 /* Printing a variable of type off_t (with e.g., PyUnicode_FromFormat) 85 correctly and without producing compiler warnings is surprisingly painful. 86 We identify an integer type whose size matches off_t and then: (1) cast the 87 off_t to that integer type and (2) use the appropriate conversion 88 specification. The cast is necessary: gcc complains about formatting a 89 long with "%lld" even when both long and long long have the same 90 precision. */ 91 92 #ifdef MS_WINDOWS 93 94 /* Windows uses long long for offsets */ 95 typedef long long Py_off_t; 96 # define PyLong_AsOff_t PyLong_AsLongLong 97 # define PyLong_FromOff_t PyLong_FromLongLong 98 # define PY_OFF_T_MAX LLONG_MAX 99 # define PY_OFF_T_MIN LLONG_MIN 100 # define PY_OFF_T_COMPAT long long /* type compatible with off_t */ 101 # define PY_PRIdOFF "lld" /* format to use for that type */ 102 103 #else 104 105 /* Other platforms use off_t */ 106 typedef off_t Py_off_t; 107 #if (SIZEOF_OFF_T == SIZEOF_SIZE_T) 108 # define PyLong_AsOff_t PyLong_AsSsize_t 109 # define PyLong_FromOff_t PyLong_FromSsize_t 110 # define PY_OFF_T_MAX PY_SSIZE_T_MAX 111 # define PY_OFF_T_MIN PY_SSIZE_T_MIN 112 # define PY_OFF_T_COMPAT Py_ssize_t 113 # define PY_PRIdOFF "zd" 114 #elif (SIZEOF_OFF_T == SIZEOF_LONG_LONG) 115 # define PyLong_AsOff_t PyLong_AsLongLong 116 # define PyLong_FromOff_t PyLong_FromLongLong 117 # define PY_OFF_T_MAX LLONG_MAX 118 # define PY_OFF_T_MIN LLONG_MIN 119 # define PY_OFF_T_COMPAT long long 120 # define PY_PRIdOFF "lld" 121 #elif (SIZEOF_OFF_T == SIZEOF_LONG) 122 # define PyLong_AsOff_t PyLong_AsLong 123 # define PyLong_FromOff_t PyLong_FromLong 124 # define PY_OFF_T_MAX LONG_MAX 125 # define PY_OFF_T_MIN LONG_MIN 126 # define PY_OFF_T_COMPAT long 127 # define PY_PRIdOFF "ld" 128 #else 129 # error off_t does not match either size_t, long, or long long! 130 #endif 131 132 #endif 133 134 extern Py_off_t PyNumber_AsOff_t(PyObject *item, PyObject *err); 135 136 /* Implementation details */ 137 138 /* IO module structure */ 139 140 extern PyModuleDef _PyIO_Module; 141 142 typedef struct { 143 int initialized; 144 PyObject *locale_module; 145 146 PyObject *unsupported_operation; 147 } _PyIO_State; 148 149 #define IO_MOD_STATE(mod) ((_PyIO_State *)PyModule_GetState(mod)) 150 #define IO_STATE() _PyIO_get_module_state() 151 152 extern _PyIO_State *_PyIO_get_module_state(void); 153 extern PyObject *_PyIO_get_locale_module(_PyIO_State *); 154 155 #ifdef MS_WINDOWS 156 extern char _PyIO_get_console_type(PyObject *); 157 #endif 158 159 extern PyObject *_PyIO_str_close; 160 extern PyObject *_PyIO_str_closed; 161 extern PyObject *_PyIO_str_decode; 162 extern PyObject *_PyIO_str_encode; 163 extern PyObject *_PyIO_str_fileno; 164 extern PyObject *_PyIO_str_flush; 165 extern PyObject *_PyIO_str_getstate; 166 extern PyObject *_PyIO_str_isatty; 167 extern PyObject *_PyIO_str_newlines; 168 extern PyObject *_PyIO_str_nl; 169 extern PyObject *_PyIO_str_read; 170 extern PyObject *_PyIO_str_read1; 171 extern PyObject *_PyIO_str_readable; 172 extern PyObject *_PyIO_str_readall; 173 extern PyObject *_PyIO_str_readinto; 174 extern PyObject *_PyIO_str_readline; 175 extern PyObject *_PyIO_str_reset; 176 extern PyObject *_PyIO_str_seek; 177 extern PyObject *_PyIO_str_seekable; 178 extern PyObject *_PyIO_str_setstate; 179 extern PyObject *_PyIO_str_tell; 180 extern PyObject *_PyIO_str_truncate; 181 extern PyObject *_PyIO_str_writable; 182 extern PyObject *_PyIO_str_write; 183 184 extern PyObject *_PyIO_empty_str; 185 extern PyObject *_PyIO_empty_bytes; 186 extern PyObject *_PyIO_zero; 187 188 extern PyTypeObject _PyBytesIOBuffer_Type; 189
