mirror of https://github.com/python/cpython
186 lines
6.0 KiB
C
186 lines
6.0 KiB
C
/*
|
|
* Declarations shared between the different parts of the io module
|
|
*/
|
|
|
|
#include "exports.h"
|
|
|
|
#include "pycore_moduleobject.h" // _PyModule_GetState()
|
|
#include "structmember.h"
|
|
|
|
/* ABCs */
|
|
extern PyTypeObject PyIOBase_Type;
|
|
extern PyTypeObject PyRawIOBase_Type;
|
|
extern PyTypeObject PyBufferedIOBase_Type;
|
|
extern PyTypeObject PyTextIOBase_Type;
|
|
|
|
/* Concrete classes */
|
|
extern PyTypeObject PyIncrementalNewlineDecoder_Type;
|
|
|
|
/* Type specs */
|
|
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 fileio_spec;
|
|
extern PyType_Spec stringio_spec;
|
|
extern PyType_Spec textiowrapper_spec;
|
|
|
|
#ifdef HAVE_WINDOWS_CONSOLE_IO
|
|
extern PyTypeObject PyWindowsConsoleIO_Type;
|
|
#endif /* HAVE_WINDOWS_CONSOLE_IO */
|
|
|
|
/* 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.
|
|
*/
|
|
extern PyObject* _PyIOBase_check_readable(PyObject *self, PyObject *args);
|
|
extern PyObject* _PyIOBase_check_writable(PyObject *self, PyObject *args);
|
|
extern PyObject* _PyIOBase_check_seekable(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 (8 * 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
|
|
|
|
#endif
|
|
|
|
extern Py_off_t PyNumber_AsOff_t(PyObject *item, PyObject *err);
|
|
|
|
/* Implementation details */
|
|
|
|
/* IO module structure */
|
|
|
|
extern PyModuleDef _PyIO_Module;
|
|
|
|
typedef struct {
|
|
int initialized;
|
|
PyObject *locale_module;
|
|
|
|
PyObject *unsupported_operation;
|
|
|
|
/* Types */
|
|
PyTypeObject *PyBufferedRWPair_Type;
|
|
PyTypeObject *PyBufferedRandom_Type;
|
|
PyTypeObject *PyBufferedReader_Type;
|
|
PyTypeObject *PyBufferedWriter_Type;
|
|
PyTypeObject *PyBytesIO_Type;
|
|
PyTypeObject *PyFileIO_Type;
|
|
PyTypeObject *PyStringIO_Type;
|
|
PyTypeObject *PyTextIOWrapper_Type;
|
|
} _PyIO_State;
|
|
|
|
#define IO_MOD_STATE(mod) ((_PyIO_State *)PyModule_GetState(mod))
|
|
#define IO_STATE() _PyIO_get_module_state()
|
|
|
|
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 *
|
|
find_io_state_by_def(PyTypeObject *type)
|
|
{
|
|
PyObject *mod = PyType_GetModuleByDef(type, &_PyIO_Module);
|
|
assert(mod != NULL);
|
|
return get_io_state(mod);
|
|
}
|
|
|
|
extern _PyIO_State *_PyIO_get_module_state(void);
|
|
|
|
#ifdef HAVE_WINDOWS_CONSOLE_IO
|
|
extern char _PyIO_get_console_type(PyObject *);
|
|
#endif
|
|
|
|
extern Py_EXPORTED_SYMBOL PyTypeObject _PyBytesIOBuffer_Type;
|