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file_compat.h
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#ifndef
__FILE_COMPAT_H__
#define
__FILE_COMPAT_H__
#include
"numpy/npy_3kcompat.h"
#if
NPY_API_VERSION
<
0x4
/* corresponds to Numpy 1.5 */
/*
* PyFile_* compatibility
*/
#if
defined(
NPY_PY3K
)
/*
* Get a FILE* handle to the file represented by the Python object
*/
static
NPY_INLINE
FILE
*
npy_PyFile_Dup
(
PyObject
*
file
,
char
*
mode
)
{
int
fd
,
fd2
;
PyObject
*
ret
,
*
os
;
Py_ssize_t
pos
;
FILE
*
handle
;
/* Flush first to ensure things end up in the file in the correct order */
ret
=
PyObject_CallMethod
(
file
,
"flush"
,
""
);
if
(
ret
==
NULL
) {
return
NULL
;
}
Py_DECREF
(
ret
);
fd
=
PyObject_AsFileDescriptor
(
file
);
if
(
fd
==
-1
) {
return
NULL
;
}
os
=
PyImport_ImportModule
(
"os"
);
if
(
os
==
NULL
) {
return
NULL
;
}
ret
=
PyObject_CallMethod
(
os
,
"dup"
,
"i"
,
fd
);
Py_DECREF
(
os
);
if
(
ret
==
NULL
) {
return
NULL
;
}
fd2
=
PyNumber_AsSsize_t
(
ret
,
NULL
);
Py_DECREF
(
ret
);
#ifdef
_WIN32
handle
=
_fdopen
(
fd2
,
mode
);
#else
handle
=
fdopen
(
fd2
,
mode
);
#endif
if
(
handle
==
NULL
) {
PyErr_SetString
(
PyExc_IOError
,
"Getting a FILE* from a Python file object failed"
);
}
ret
=
PyObject_CallMethod
(
file
,
"tell"
,
""
);
if
(
ret
==
NULL
) {
fclose
(
handle
);
return
NULL
;
}
pos
=
PyNumber_AsSsize_t
(
ret
,
PyExc_OverflowError
);
Py_DECREF
(
ret
);
if
(
PyErr_Occurred
()) {
fclose
(
handle
);
return
NULL
;
}
npy_fseek
(
handle
,
pos
,
SEEK_SET
);
return
handle
;
}
/*
* Close the dup-ed file handle, and seek the Python one to the current position
*/
static
NPY_INLINE
int
npy_PyFile_DupClose
(
PyObject
*
file
,
FILE
*
handle
)
{
PyObject
*
ret
;
Py_ssize_t
position
;
position
=
npy_ftell
(
handle
);
fclose
(
handle
);
ret
=
PyObject_CallMethod
(
file
,
"seek"
,
NPY_SSIZE_T_PYFMT
"i"
,
position
,
0
);
if
(
ret
==
NULL
) {
return
-1
;
}
Py_DECREF
(
ret
);
return
0
;
}
static
NPY_INLINE
int
npy_PyFile_Check
(
PyObject
*
file
)
{
int
fd
;
fd
=
PyObject_AsFileDescriptor
(
file
);
if
(
fd
==
-1
) {
PyErr_Clear
();
return
0
;
}
return
1
;
}
#else
#define
npy_PyFile_Dup
(
file
,
mode
) PyFile_AsFile(file)
#define
npy_PyFile_DupClose
(
file
,
handle
) (0)
#endif
static
NPY_INLINE
PyObject
*
npy_PyFile_OpenFile
(
PyObject
*
filename
,
const
char
*
mode
)
{
PyObject
*
open
;
open
=
PyDict_GetItemString
(
PyEval_GetBuiltins
(),
"open"
);
if
(
open
==
NULL
) {
return
NULL
;
}
return
PyObject_CallFunction
(
open
,
"Os"
,
filename
,
mode
);
}
#endif
/* NPY_API_VERSION < 0x4 */
#if
NPY_API_VERSION
<
0x7
/* corresponds to Numpy 1.7 */
static
NPY_INLINE
int
npy_PyFile_CloseFile
(
PyObject
*
file
)
{
PyObject
*
ret
;
ret
=
PyObject_CallMethod
(
file
,
"close"
,
NULL
);
if
(
ret
==
NULL
) {
return
-1
;
}
Py_DECREF
(
ret
);
return
0
;
}
#endif
/* NPY_API_VERSION < 0x7 */
#endif
/* ifndef __FILE_COMPAT_H__ */
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