diff options
Diffstat (limited to 'Modules/_io/stringio.c')
| -rw-r--r-- | Modules/_io/stringio.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/Modules/_io/stringio.c b/Modules/_io/stringio.c index 9d1bfa3ea05..56913fafefb 100644 --- a/Modules/_io/stringio.c +++ b/Modules/_io/stringio.c @@ -444,7 +444,7 @@ stringio_iternext(PyObject *op) /*[clinic input] @critical_section _io.StringIO.truncate - pos as size: Py_ssize_t(accept={int, NoneType}, c_default="((stringio *)self)->pos") = None + pos: object = None / Truncate size to pos. @@ -455,16 +455,26 @@ Returns the new absolute position. [clinic start generated code]*/ static PyObject * -_io_StringIO_truncate_impl(stringio *self, Py_ssize_t size) -/*[clinic end generated code: output=eb3aef8e06701365 input=fa8a6c98bb2ba780]*/ +_io_StringIO_truncate_impl(stringio *self, PyObject *pos) +/*[clinic end generated code: output=c76c43b5ecfaf4e2 input=d59fd2ee49757ae6]*/ { CHECK_INITIALIZED(self); CHECK_CLOSED(self); - if (size < 0) { - PyErr_Format(PyExc_ValueError, - "Negative size value %zd", size); - return NULL; + Py_ssize_t size; + if (pos == Py_None) { + size = self->pos; + } + else { + size = PyLong_AsLong(pos); + if (size == -1 && PyErr_Occurred()) { + return NULL; + } + if (size < 0) { + PyErr_Format(PyExc_ValueError, + "negative pos value %zd", size); + return NULL; + } } if (size < self->string_size) { |