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SF # 595026: support for masks in getargs.c.

Browse source 
New functions:
  unsigned long PyInt_AsUnsignedLongMask(PyObject *);
  unsigned PY_LONG_LONG) PyInt_AsUnsignedLongLongMask(PyObject *);
  unsigned long PyLong_AsUnsignedLongMask(PyObject *);
  unsigned PY_LONG_LONG) PyLong_AsUnsignedLongLongMask(PyObject *);

New and changed format codes:

b unsigned char 0..UCHAR_MAX
B unsigned char none **
h unsigned short 0..USHRT_MAX
H unsigned short none **
i int INT_MIN..INT_MAX
I * unsigned int 0..UINT_MAX
l long LONG_MIN..LONG_MAX
k * unsigned long none
L long long LLONG_MIN..LLONG_MAX
K * unsigned long long none

Notes:

* New format codes.

** Changed from previous "range-and-a-half" to "none"; the
range-and-a-half checking wasn't particularly useful.

New test test_getargs2.py, to verify all this.
This commit is contained in:
Thomas Heller 2003-04-17 18:55:45 +00:00
parent e13ddc9ec8
commit a4ea603b05
7 changed files with 596 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

55
Objects/longobject.c
View file

@ -260,6 +260,34 @@ PyLong_AsUnsignedLong(PyObject *vv)
return x;
}
/* Get a C unsigned long int from a long int object, ignoring the high bits.
Returns -1 and sets an error condition if an error occurs. */
unsigned long
PyLong_AsUnsignedLongMask(PyObject *vv)
{
register PyLongObject *v;
unsigned long x;
int i, sign;
if (vv == NULL || !PyLong_Check(vv)) {
PyErr_BadInternalCall();
return (unsigned long) -1;
}
v = (PyLongObject *)vv;
i = v->ob_size;
sign = 1;
x = 0;
if (i < 0) {
sign = -1;
i = -i;
}
while (--i >= 0) {
x = (x << SHIFT) + v->ob_digit[i];
}
return x * sign;
}
int
_PyLong_Sign(PyObject *vv)
{
@ -779,6 +807,33 @@ PyLong_AsUnsignedLongLong(PyObject *vv)
return bytes;
}
/* Get a C unsigned long int from a long int object, ignoring the high bits.
Returns -1 and sets an error condition if an error occurs. */
unsigned PY_LONG_LONG
PyLong_AsUnsignedLongLongMask(PyObject *vv)
{
register PyLongObject *v;
unsigned PY_LONG_LONG x;
int i, sign;
if (vv == NULL || !PyLong_Check(vv)) {
PyErr_BadInternalCall();
return (unsigned long) -1;
}
v = (PyLongObject *)vv;
i = v->ob_size;
sign = 1;
x = 0;
if (i < 0) {
sign = -1;
i = -i;
}
while (--i >= 0) {
x = (x << SHIFT) + v->ob_digit[i];
}
return x * sign;
}
#undef IS_LITTLE_ENDIAN
#endif /* HAVE_LONG_LONG */