1 files changed, 58 insertions, 0 deletions
diff --git a/windows/msvc/gettimeofday.c b/windows/msvc/gettimeofday.c
new file mode 100644
index 0000000000..363d59d7bc
--- /dev/null
+++ b/windows/msvc/gettimeofday.c
@@ -0,0 +1,58 @@
+/*
+* This file is part of the Micro Python project, http://micropython.org/
+*
+* The MIT License (MIT)
+*
+* Copyright (c) 2013, 2014 Damien P. George
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+*/
+
+#include <Winsock2.h>
+
+typedef union {
+    unsigned __int64 tm; // time in 100 nanoseconds interval
+    FILETIME ft;
+} FT;
+
+int gettimeofday(struct timeval *tp, struct timezone *tz) {
+    if (tp == NULL) {
+        return 0;
+    }
+
+    // UTC time
+    FT ft;
+    ZeroMemory(&ft, sizeof(ft));
+    GetSystemTimeAsFileTime(&ft.ft);
+
+    // to microseconds
+    ft.tm /= 10;
+        
+    // convert to unix format
+    // number of microseconds intervals between the 1st january 1601 and the 1st january 1970 (369 years + 89 leap days)
+    const unsigned __int64 deltaEpoch = 11644473600000000ull;
+    const unsigned __int64 microSecondsToSeconds = 1000000ull;
+    tp->tv_usec = ft.tm % microSecondsToSeconds;
+    tp->tv_sec = (ft.tm - deltaEpoch) / microSecondsToSeconds;
+
+    // see man gettimeofday: timezone is deprecated and expected to be NULL
+    (void)tz;
+
+    return 0;
+}