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* 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.

typedef struct _io_state _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 (128 * 1024) /* bytes */

* 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 PyLong_AsLongLong

# define PyLong_FromOff_t PyLong_FromLongLong

# define PY_OFF_T_MAX LLONG_MAX

# define PY_OFF_T_MIN LLONG_MIN

# define PY_OFF_T_COMPAT long long /* type compatible with off_t */

# define PY_PRIdOFF "lld" /* format to use for that type */

#else

/* Other platforms use off_t */

typedef off_t Py_off_t;

#if (SIZEOF_OFF_T == SIZEOF_SIZE_T)

# define PyLong_AsOff_t PyLong_AsSsize_t

# define PyLong_FromOff_t PyLong_FromSsize_t

# define PY_OFF_T_MAX PY_SSIZE_T_MAX

# define PY_OFF_T_MIN PY_SSIZE_T_MIN

# define PY_OFF_T_COMPAT Py_ssize_t

# define PY_PRIdOFF "zd"

#elif (SIZEOF_OFF_T == SIZEOF_LONG_LONG)

# define PyLong_AsOff_t PyLong_AsLongLong

# define PyLong_FromOff_t PyLong_FromLongLong

# define PY_OFF_T_MAX LLONG_MAX

# define PY_OFF_T_MIN LLONG_MIN

# define PY_OFF_T_COMPAT long long

# define PY_PRIdOFF "lld"

#elif (SIZEOF_OFF_T == SIZEOF_LONG)

# define PyLong_AsOff_t PyLong_AsLong

# define PyLong_FromOff_t PyLong_FromLong

# define PY_OFF_T_MAX LONG_MAX

# define PY_OFF_T_MIN LONG_MIN

# define PY_OFF_T_COMPAT long

# define PY_PRIdOFF "ld"

#else

# error off_t does not match either size_t, long, or long long!

#endif

extern Py_off_t PyNumber_AsOff_t(PyObject *item, PyObject *err);

/* Implementation details */

/* IO module structure */

extern PyModuleDef _PyIO_Module;

struct _io_state {

int initialized;

PyObject *unsupported_operation;

/* Types */

PyTypeObject *PyIOBase_Type;

PyTypeObject *PyIncrementalNewlineDecoder_Type;

PyTypeObject *PyRawIOBase_Type;

PyTypeObject *PyBufferedIOBase_Type;

PyTypeObject *PyBufferedRWPair_Type;

PyTypeObject *PyBufferedRandom_Type;

PyTypeObject *PyBufferedReader_Type;

PyTypeObject *PyBufferedWriter_Type;

PyTypeObject *PyBytesIOBuffer_Type;

PyTypeObject *PyBytesIO_Type;

PyTypeObject *PyFileIO_Type;

PyTypeObject *PyStringIO_Type;

PyTypeObject *PyTextIOBase_Type;

PyTypeObject *PyTextIOWrapper_Type;

#ifdef HAVE_WINDOWS_CONSOLE_IO

PyTypeObject *PyWindowsConsoleIO_Type;

#endif

};

static inline _PyIO_State *

get_io_state(PyObject *module)

{

void *state = _PyModule_GetState(module);

assert(state != NULL);

return (_PyIO_State *)state;

}

static inline _PyIO_State *

get_io_state_by_cls(PyTypeObject *cls)

{

void *state = _PyType_GetModuleState(cls);

assert(state != NULL);

return (_PyIO_State *)state;

}

static inline _PyIO_State *

find_io_state_by_def(PyTypeObject *type)

{

PyObject *mod = PyType_GetModuleByDef(type, &_PyIO_Module);

assert(mod != NULL);

return get_io_state(mod);

}

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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