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Checkin of Jack's buffer mods.

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Not really checked, but didn't fail any tests either...
This commit is contained in:
Guido van Rossum 1997-05-05 22:15:02 +00:00
parent 8290e07509
commit fdf95dd525
5 changed files with 232 additions and 27 deletions
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42
Objects/stringobject.c
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@ -456,6 +456,40 @@ string_hash(a)
return x;
}
static int
string_buffer_getreadbuf(self, index, ptr)
PyStringObject *self;
int index;
const void **ptr;
{
if ( index != 0 ) {
PyErr_SetString(PyExc_SystemError, "Accessing non-existent string segment");
return -1;
}
*ptr = (void *)self->ob_sval;
return self->ob_size;
}
static int
string_buffer_getwritebuf(self, index, ptr)
PyStringObject *self;
int index;
const void **ptr;
{
PyErr_SetString(PyExc_TypeError, "Cannot use string as modifyable buffer");
return -1;
}
static int
string_buffer_getsegcount(self, lenp)
PyStringObject *self;
int *lenp;
{
if ( lenp )
*lenp = self->ob_size;
return 1;
}
static PySequenceMethods string_as_sequence = {
(inquiry)string_length, /*sq_length*/
(binaryfunc)string_concat, /*sq_concat*/
@ -466,6 +500,12 @@ static PySequenceMethods string_as_sequence = {
0, /*sq_ass_slice*/
};
static PyBufferProcs string_as_buffer = {
(getreadbufferproc)string_buffer_getreadbuf,
(getwritebufferproc)string_buffer_getwritebuf,
(getsegcountproc)string_buffer_getsegcount,
};
PyTypeObject PyString_Type = {
PyObject_HEAD_INIT(&PyType_Type)
0,
@ -486,7 +526,7 @@ PyTypeObject PyString_Type = {
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_xxx3*/
&string_as_buffer, /*tp_as_buffer*/
0, /*tp_xxx4*/
0, /*tp_doc*/
};