> On Windows, the type of the size parameter of read() is an unsigned int, not long nor size_t (...)

Oh, I read the wrong function. In fact, file_read() of Python 2.7 calls fread() and fread() uses size_t types, even on Windows.

To make sure that we are talking about the same thing, I wrote the attached file_read_size_t.patch file which replaces "l" with "n" in file_read().

Note: os.read() uses int types, even on Python 3.5, whereas read() uses a size_t type for the number of bytes on Linux.