Ryan Coyner <rcoy...@gmail.com> added the comment: You don't want to do c_size_t = c_void_p because that will prevent type checking. We want c_size_t to be integers; setting it to c_void_p will accept other values. The lines that define c_size_t are doing a sizeof check to determine how many bits the CPU supports, and c_size_t should represent unsigned integers [1].
On a 16-bit machine: c_size_t = c_uint On a 32-bit machine: c_size_t = c_ulong On a 64-bit machine: c_size_t = c_ulonglong Now, ssize_t is like size_t, except that it is signed [2]. So if I am not mistaken, all we have to do is: if sizeof(c_uint) == sizeof(c_void_p): c_size_t = c_uint c_ssize_t = c_int elif sizeof(c_ulong) == sizeof(c_void_p): c_size_t = c_ulong c_ssize_t = c_long elif sizeof(c_ulonglong) == sizeof(c_void_p): c_size_t = c_ulonglong c_ssize_t = c_longlong Patch attached with documentation and unit test. [1] - http://www.gnu.org/software/libc/manual/html_node/Important-Data-Types.html [2] - http://www.gnu.org/software/libc/manual/html_node/I_002fO-Primitives.html ---------- keywords: +patch nosy: +rcoyner Added file: http://bugs.python.org/file16405/issue6729.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue6729> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com