bpo-33671 / shutil.copyfile: use memoryview() with dynamic size on Windows (#7681)
bpo-33671
* use memoryview() with size == file size on Windows, see https://github.com/python/cpython/pull/7160#discussion_r195405230
* release intermediate (sliced) memoryview immediately
* replace "OSX" occurrences with "macOS"
* add some unittests for copyfileobj()
diff --git a/Modules/clinic/posixmodule.c.h b/Modules/clinic/posixmodule.c.h
index c41d131..7a21885 100644
--- a/Modules/clinic/posixmodule.c.h
+++ b/Modules/clinic/posixmodule.c.h
@@ -3859,7 +3859,7 @@
"_fcopyfile($module, infd, outfd, flags, /)\n"
"--\n"
"\n"
-"Efficiently copy content or metadata of 2 regular file descriptors (OSX).");
+"Efficiently copy content or metadata of 2 regular file descriptors (macOS).");
#define OS__FCOPYFILE_METHODDEF \
{"_fcopyfile", (PyCFunction)os__fcopyfile, METH_FASTCALL, os__fcopyfile__doc__},
@@ -6627,4 +6627,4 @@
#ifndef OS_GETRANDOM_METHODDEF
#define OS_GETRANDOM_METHODDEF
#endif /* !defined(OS_GETRANDOM_METHODDEF) */
-/*[clinic end generated code: output=b5d1ec71bc6f0651 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=47fb6a3e88cba6d9 input=a9049054013a1b77]*/