mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 17:08:35 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 13

Added PyObject_AsFileDescriptor, which checks for integer, long integer,

Browse source 
or .fileno() method
This commit is contained in:
Andrew M. Kuchling 2000-07-13 23:56:54 +00:00
parent 9656abd913
commit 06051edc0d
2 changed files with 59 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
Include/fileobject.h
View file

@ -30,6 +30,7 @@ extern DL_IMPORT(PyObject *) PyFile_GetLine(PyObject *, int);
extern DL_IMPORT(int) PyFile_WriteObject(PyObject *, PyObject *, int);
extern DL_IMPORT(int) PyFile_SoftSpace(PyObject *, int);
extern DL_IMPORT(int) PyFile_WriteString(char *, PyObject *);
extern DL_IMPORT(int) PyObject_AsFileDescriptor(PyObject *);
#ifdef __cplusplus
}

58
Objects/fileobject.c
View file

@ -1098,3 +1098,61 @@ PyFile_WriteString(char *s, PyObject *f)
else
return -1;
}
/* Try to get a file-descriptor from a Python object. If the object
is an integer or long integer, its value is returned. If not, the
object's fileno() method is called if it exists; the method must return
an integer or long integer, which is returned as the file descriptor value.
-1 is returned on failure.
*/
int PyObject_AsFileDescriptor(PyObject *o)
{
int fd;
PyObject *meth;
if (PyInt_Check(o)) {
fd = PyInt_AsLong(o);
}
else if (PyLong_Check(o)) {
fd = PyLong_AsLong(o);
}
else if ((meth = PyObject_GetAttrString(o, "fileno")) != NULL)
{
PyObject *fno = PyEval_CallObject(meth, NULL);
Py_DECREF(meth);
if (fno == NULL)
return -1;
if (PyInt_Check(fno)) {
fd = PyInt_AsLong(fno);
Py_DECREF(fno);
}
else if (PyLong_Check(fno)) {
fd = PyLong_AsLong(fno);
Py_DECREF(fno);
}
else {
PyErr_SetString(PyExc_TypeError,
"fileno() returned a non-integer");
Py_DECREF(fno);
return -1;
}
}
else {
PyErr_SetString(PyExc_TypeError,
"argument must be an int, or have a fileno() method.");
return -1;
}
if (fd < 0) {
PyErr_Format(PyExc_ValueError,
"file descriptor cannot be a negative integer (%i)",
fd);
return -1;
}
return fd;
}