1424                      const char *method, Py_ssize_t sizehint)  in mbstreamreader_iread()  argument
1430     if (sizehint == 0)  in mbstreamreader_iread()
1440         if (sizehint < 0)  in mbstreamreader_iread()
1445                             method, "i", sizehint);  in mbstreamreader_iread()
1490         if (endoffile || sizehint < 0) {  in mbstreamreader_iread()
1506         if (sizehint < 0 || buf.writer.pos != 0 || rsize == 0)  in mbstreamreader_iread()
1509         sizehint = 1; /* read 1 more byte and retry */  in mbstreamreader_iread()
1598     Py_ssize_t sizehint;  in _multibytecodec_MultibyteStreamReader_readlines_impl()  local
1601         sizehint = -1;  in _multibytecodec_MultibyteStreamReader_readlines_impl()
1603         sizehint = PyLong_AsSsize_t(sizehintobj);  in _multibytecodec_MultibyteStreamReader_readlines_impl()
1609     if (sizehint == -1 && PyErr_Occurred())  in _multibytecodec_MultibyteStreamReader_readlines_impl()
1612     r = mbstreamreader_iread(self, "read", sizehint);  in _multibytecodec_MultibyteStreamReader_readlines_impl()