Mimic MSVC for timezone, optimized memcpy for hash, math

Author: Alexpux

Modules/mathmodule.c

@@ -2166,7 +2166,7 @@ math_ldexp_impl(PyObject *module, double x, PyObject *i)
     } else {
         errno = 0;
         r = ldexp(x, (int)exp);
-#ifdef _MSC_VER
+#ifdef _WIN32
         if (DBL_MIN > r && r > -DBL_MIN) {
             /* Denormal (or zero) results can be incorrectly rounded here (rather,
                truncated).  Fixed in newer versions of the C runtime, included
@@ -2404,7 +2404,7 @@ math_fmod_impl(PyObject *module, double x, double y)
         return PyFloat_FromDouble(x);
     errno = 0;
     r = fmod(x, y);
-#ifdef _MSC_VER
+#ifdef _WIN32
     /* Windows (e.g. Windows 10 with MSC v.1916) loose sign
        for zero result.  But C99+ says: "if y is nonzero, the result
        has the same sign as x".

Modules/timemodule.c

@@ -41,7 +41,7 @@
 #  include <sanitizer/msan_interface.h>
 #endif
 
-#ifdef _MSC_VER
+#ifdef _WIN32
 #  define _Py_timezone _timezone
 #  define _Py_daylight _daylight
 #  define _Py_tzname _tzname

Python/pyhash.c

@@ -215,7 +215,7 @@ PyHash_GetFuncDef(void)
 }
 
 /* Optimized memcpy() for Windows */
-#ifdef _MSC_VER
+#ifdef _WIN32
 #  if SIZEOF_PY_UHASH_T == 4
 #    define PY_UHASH_CPY(dst, src) do {                                    \
        dst[0] = src[0]; dst[1] = src[1]; dst[2] = src[2]; dst[3] = src[3]; \