/* * Declarations shared between the different parts of the io module */ #include "exports.h" #include "pycore_moduleobject.h" // _PyModule_GetState() #include "pycore_typeobject.h" // _PyType_GetModuleState() #include "structmember.h" /* Type specs */ extern PyType_Spec bufferediobase_spec; extern PyType_Spec bufferedrandom_spec; extern PyType_Spec bufferedreader_spec; extern PyType_Spec bufferedrwpair_spec; extern PyType_Spec bufferedwriter_spec; extern PyType_Spec bytesio_spec; extern PyType_Spec bytesiobuf_spec; extern PyType_Spec fileio_spec; extern PyType_Spec iobase_spec; extern PyType_Spec nldecoder_spec; extern PyType_Spec rawiobase_spec; extern PyType_Spec stringio_spec; extern PyType_Spec textiobase_spec; extern PyType_Spec textiowrapper_spec; #ifdef HAVE_WINDOWS_CONSOLE_IO extern PyType_Spec winconsoleio_spec; #endif /* These functions are used as METH_NOARGS methods, are normally called * with args=NULL, and return a new reference. * BUT when args=Py_True is passed, they return a borrowed reference. */ _PyIO_State; // Forward decl. extern PyObject* _PyIOBase_check_readable(_PyIO_State *state, PyObject *self, PyObject *args); extern PyObject* _PyIOBase_check_writable(_PyIO_State *state, PyObject *self, PyObject *args); extern PyObject* _PyIOBase_check_seekable(_PyIO_State *state, PyObject *self, PyObject *args); extern PyObject* _PyIOBase_check_closed(PyObject *self, PyObject *args); /* Helper for finalization. This function will revive an object ready to be deallocated and try to close() it. It returns 0 if the object can be destroyed, or -1 if it is alive again. */ extern int _PyIOBase_finalize(PyObject *self); /* Returns true if the given FileIO object is closed. Doesn't check the argument type, so be careful! */ extern int _PyFileIO_closed(PyObject *self); /* Shortcut to the core of the IncrementalNewlineDecoder.decode method */ extern PyObject *_PyIncrementalNewlineDecoder_decode( PyObject *self, PyObject *input, int final); /* Finds the first line ending between `start` and `end`. If found, returns the index after the line ending and doesn't touch `*consumed`. If not found, returns -1 and sets `*consumed` to the number of characters which can be safely put aside until another search. NOTE: for performance reasons, `end` must point to a NUL character ('\0'). Otherwise, the function will scan further and return garbage. There are three modes, in order of priority: * translated: Only find \n (assume newlines already translated) * universal: Use universal newlines algorithm * Otherwise, the line ending is specified by readnl, a str object */ extern Py_ssize_t _PyIO_find_line_ending( int translated, int universal, PyObject *readnl, int kind, const char *start, const char *end, Py_ssize_t *consumed); /* Return 1 if an OSError with errno == EINTR is set (and then clears the error indicator), 0 otherwise. Should only be called when PyErr_Occurred() is true. */ extern int _PyIO_trap_eintr(void); #define DEFAULT_BUFFER_SIZE … /* * Offset type for positioning. */ /* Printing a variable of type off_t (with e.g., PyUnicode_FromFormat) correctly and without producing compiler warnings is surprisingly painful. We identify an integer type whose size matches off_t and then: (1) cast the off_t to that integer type and (2) use the appropriate conversion specification. The cast is necessary: gcc complains about formatting a long with "%lld" even when both long and long long have the same precision. */ #ifdef MS_WINDOWS /* Windows uses long long for offsets */ typedef long long Py_off_t; #define PyLong_AsOff_t … #define PyLong_FromOff_t … #define PY_OFF_T_MAX … #define PY_OFF_T_MIN … #define PY_OFF_T_COMPAT … #define PY_PRIdOFF … #else /* Other platforms use off_t */ Py_off_t; #if (SIZEOF_OFF_T == SIZEOF_SIZE_T) #define PyLong_AsOff_t … #define PyLong_FromOff_t … #define PY_OFF_T_MAX … #define PY_OFF_T_MIN … #define PY_OFF_T_COMPAT … #define PY_PRIdOFF … #elif (SIZEOF_OFF_T == SIZEOF_LONG_LONG) #define PyLong_AsOff_t … #define PyLong_FromOff_t … #define PY_OFF_T_MAX … #define PY_OFF_T_MIN … #define PY_OFF_T_COMPAT … #define PY_PRIdOFF … #elif (SIZEOF_OFF_T == SIZEOF_LONG) #define PyLong_AsOff_t … #define PyLong_FromOff_t … #define PY_OFF_T_MAX … #define PY_OFF_T_MIN … #define PY_OFF_T_COMPAT … #define PY_PRIdOFF … #else # error off_t does not match either size_t, long, or long long! #endif #endif extern Py_off_t PyNumber_AsOff_t(PyObject *item, PyObject *err); /* Implementation details */ /* IO module structure */ extern PyModuleDef _PyIO_Module; struct _io_state { … }; static inline _PyIO_State * get_io_state(PyObject *module) { … } static inline _PyIO_State * get_io_state_by_cls(PyTypeObject *cls) { … } static inline _PyIO_State * find_io_state_by_def(PyTypeObject *type) { … } extern PyObject *_PyIOBase_cannot_pickle(PyObject *self, PyObject *args); #ifdef HAVE_WINDOWS_CONSOLE_IO extern char _PyIO_get_console_type(PyObject *); #endif
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