mirror of https://github.com/python/cpython
198 lines
6.6 KiB
C
198 lines
6.6 KiB
C
/*
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* Declarations shared between the different parts of the io module
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*/
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#include "exports.h"
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#include "pycore_moduleobject.h" // _PyModule_GetState()
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#include "pycore_typeobject.h" // _PyType_GetModuleState()
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#include "structmember.h"
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/* Type specs */
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extern PyType_Spec bufferediobase_spec;
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extern PyType_Spec bufferedrandom_spec;
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extern PyType_Spec bufferedreader_spec;
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extern PyType_Spec bufferedrwpair_spec;
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extern PyType_Spec bufferedwriter_spec;
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extern PyType_Spec bytesio_spec;
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extern PyType_Spec bytesiobuf_spec;
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extern PyType_Spec fileio_spec;
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extern PyType_Spec iobase_spec;
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extern PyType_Spec nldecoder_spec;
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extern PyType_Spec rawiobase_spec;
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extern PyType_Spec stringio_spec;
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extern PyType_Spec textiobase_spec;
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extern PyType_Spec textiowrapper_spec;
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#ifdef HAVE_WINDOWS_CONSOLE_IO
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extern PyType_Spec winconsoleio_spec;
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#endif
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/* These functions are used as METH_NOARGS methods, are normally called
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* with args=NULL, and return a new reference.
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* BUT when args=Py_True is passed, they return a borrowed reference.
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*/
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typedef struct _io_state _PyIO_State; // Forward decl.
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extern PyObject* _PyIOBase_check_readable(_PyIO_State *state,
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PyObject *self, PyObject *args);
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extern PyObject* _PyIOBase_check_writable(_PyIO_State *state,
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PyObject *self, PyObject *args);
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extern PyObject* _PyIOBase_check_seekable(_PyIO_State *state,
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PyObject *self, PyObject *args);
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extern PyObject* _PyIOBase_check_closed(PyObject *self, PyObject *args);
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/* Helper for finalization.
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This function will revive an object ready to be deallocated and try to
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close() it. It returns 0 if the object can be destroyed, or -1 if it
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is alive again. */
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extern int _PyIOBase_finalize(PyObject *self);
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/* Returns true if the given FileIO object is closed.
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Doesn't check the argument type, so be careful! */
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extern int _PyFileIO_closed(PyObject *self);
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/* Shortcut to the core of the IncrementalNewlineDecoder.decode method */
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extern PyObject *_PyIncrementalNewlineDecoder_decode(
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PyObject *self, PyObject *input, int final);
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/* Finds the first line ending between `start` and `end`.
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If found, returns the index after the line ending and doesn't touch
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`*consumed`.
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If not found, returns -1 and sets `*consumed` to the number of characters
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which can be safely put aside until another search.
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NOTE: for performance reasons, `end` must point to a NUL character ('\0').
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Otherwise, the function will scan further and return garbage.
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There are three modes, in order of priority:
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* translated: Only find \n (assume newlines already translated)
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* universal: Use universal newlines algorithm
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* Otherwise, the line ending is specified by readnl, a str object */
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extern Py_ssize_t _PyIO_find_line_ending(
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int translated, int universal, PyObject *readnl,
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int kind, const char *start, const char *end, Py_ssize_t *consumed);
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/* Return 1 if an OSError with errno == EINTR is set (and then
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clears the error indicator), 0 otherwise.
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Should only be called when PyErr_Occurred() is true.
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*/
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extern int _PyIO_trap_eintr(void);
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#define DEFAULT_BUFFER_SIZE (8 * 1024) /* bytes */
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/*
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* Offset type for positioning.
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*/
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/* Printing a variable of type off_t (with e.g., PyUnicode_FromFormat)
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correctly and without producing compiler warnings is surprisingly painful.
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We identify an integer type whose size matches off_t and then: (1) cast the
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off_t to that integer type and (2) use the appropriate conversion
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specification. The cast is necessary: gcc complains about formatting a
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long with "%lld" even when both long and long long have the same
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precision. */
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#ifdef MS_WINDOWS
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/* Windows uses long long for offsets */
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typedef long long Py_off_t;
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# define PyLong_AsOff_t PyLong_AsLongLong
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# define PyLong_FromOff_t PyLong_FromLongLong
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# define PY_OFF_T_MAX LLONG_MAX
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# define PY_OFF_T_MIN LLONG_MIN
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# define PY_OFF_T_COMPAT long long /* type compatible with off_t */
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# define PY_PRIdOFF "lld" /* format to use for that type */
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#else
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/* Other platforms use off_t */
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typedef off_t Py_off_t;
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#if (SIZEOF_OFF_T == SIZEOF_SIZE_T)
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# define PyLong_AsOff_t PyLong_AsSsize_t
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# define PyLong_FromOff_t PyLong_FromSsize_t
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# define PY_OFF_T_MAX PY_SSIZE_T_MAX
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# define PY_OFF_T_MIN PY_SSIZE_T_MIN
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# define PY_OFF_T_COMPAT Py_ssize_t
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# define PY_PRIdOFF "zd"
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#elif (SIZEOF_OFF_T == SIZEOF_LONG_LONG)
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# define PyLong_AsOff_t PyLong_AsLongLong
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# define PyLong_FromOff_t PyLong_FromLongLong
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# define PY_OFF_T_MAX LLONG_MAX
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# define PY_OFF_T_MIN LLONG_MIN
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# define PY_OFF_T_COMPAT long long
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# define PY_PRIdOFF "lld"
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#elif (SIZEOF_OFF_T == SIZEOF_LONG)
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# define PyLong_AsOff_t PyLong_AsLong
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# define PyLong_FromOff_t PyLong_FromLong
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# define PY_OFF_T_MAX LONG_MAX
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# define PY_OFF_T_MIN LONG_MIN
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# define PY_OFF_T_COMPAT long
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# define PY_PRIdOFF "ld"
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#else
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# error off_t does not match either size_t, long, or long long!
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#endif
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#endif
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extern Py_off_t PyNumber_AsOff_t(PyObject *item, PyObject *err);
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/* Implementation details */
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/* IO module structure */
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extern PyModuleDef _PyIO_Module;
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struct _io_state {
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int initialized;
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PyObject *unsupported_operation;
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/* Types */
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PyTypeObject *PyIOBase_Type;
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PyTypeObject *PyIncrementalNewlineDecoder_Type;
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PyTypeObject *PyRawIOBase_Type;
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PyTypeObject *PyBufferedIOBase_Type;
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PyTypeObject *PyBufferedRWPair_Type;
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PyTypeObject *PyBufferedRandom_Type;
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PyTypeObject *PyBufferedReader_Type;
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PyTypeObject *PyBufferedWriter_Type;
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PyTypeObject *PyBytesIOBuffer_Type;
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PyTypeObject *PyBytesIO_Type;
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PyTypeObject *PyFileIO_Type;
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PyTypeObject *PyStringIO_Type;
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PyTypeObject *PyTextIOBase_Type;
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PyTypeObject *PyTextIOWrapper_Type;
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#ifdef HAVE_WINDOWS_CONSOLE_IO
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PyTypeObject *PyWindowsConsoleIO_Type;
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#endif
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};
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static inline _PyIO_State *
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get_io_state(PyObject *module)
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{
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void *state = _PyModule_GetState(module);
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assert(state != NULL);
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return (_PyIO_State *)state;
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}
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static inline _PyIO_State *
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get_io_state_by_cls(PyTypeObject *cls)
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{
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void *state = _PyType_GetModuleState(cls);
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assert(state != NULL);
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return (_PyIO_State *)state;
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}
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static inline _PyIO_State *
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find_io_state_by_def(PyTypeObject *type)
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{
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PyObject *mod = PyType_GetModuleByDef(type, &_PyIO_Module);
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assert(mod != NULL);
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return get_io_state(mod);
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}
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extern PyObject *_PyIOBase_cannot_pickle(PyObject *self, PyObject *args);
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#ifdef HAVE_WINDOWS_CONSOLE_IO
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extern char _PyIO_get_console_type(PyObject *);
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#endif
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