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Add *_into API for streaming encode/decode

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Kovid Goyal
2024-07-30 07:18:33 +05:30
parent 8d36677d41
commit e97c225b6c
6 changed files with 52 additions and 27 deletions
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16
kitty/data-types.c
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@@ -201,6 +201,21 @@ StreamingBase64Encoder_encode(StreamingBase64Decoder *self, PyObject *a) {
return Py_NewRef(ans);
}
static PyObject*
StreamingBase64Encoder_encode_into(StreamingBase64Decoder *self, PyObject *const *args, Py_ssize_t nargs) {
if (nargs != 2) { PyErr_SetString(PyExc_TypeError, "constructor takes exactly two arguments"); return NULL; }
RAII_PY_BUFFER(data);
if (PyObject_GetBuffer(args[0], &data, PyBUF_WRITE) != 0) return NULL;
if (!data.buf || !data.len) return PyLong_FromLong(0);
RAII_PY_BUFFER(src);
if (PyObject_GetBuffer(args[1], &src, PyBUF_SIMPLE) != 0) return NULL;
if (!src.buf || !src.len) return PyLong_FromLong(0);
size_t sz = required_buffer_size_for_base64_encode(src.len);
if ((Py_ssize_t)sz > data.len) { PyErr_SetString(PyExc_BufferError, "output buffer too small"); return NULL; }
base64_stream_encode(&self->state, src.buf, src.len, data.buf, &sz);
return PyLong_FromSize_t(sz);
}
static PyObject*
StreamingBase64Encoder_reset(StreamingBase64Decoder *self, PyObject *args UNUSED) {
char trailer[4];
@@ -219,6 +234,7 @@ static PyTypeObject StreamingBase64Encoder_Type = {
.tp_doc = "StreamingBase64Encoder",
.tp_methods = (PyMethodDef[]){
{"encode", (PyCFunction)StreamingBase64Encoder_encode, METH_O, ""},
{"encode_into", (PyCFunction)(void(*)(void))StreamingBase64Encoder_encode_into, METH_FASTCALL, ""},
{"reset", (PyCFunction)StreamingBase64Encoder_reset, METH_NOARGS, ""},
{NULL, NULL, 0, NULL},
},