From 321f74869afc757fd37f2d2be1e4bb4cdbee5308 Mon Sep 17 00:00:00 2001
From: gojimmypi <jim@wolfssl.com>
Date: Fri, 25 Aug 2023 18:30:05 -0700
Subject: [PATCH] implement gettime_secs for Windows (_MSC_VER) in tests/api.c

---
 tests/api.c | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/tests/api.c b/tests/api.c
index 9579f9076..9b7cd281b 100644
--- a/tests/api.c
+++ b/tests/api.c
@@ -66255,10 +66255,28 @@ static const char* apitest_res_string(int res)
 #ifndef WOLFSSL_UNIT_TEST_NO_TIMING
 static double gettime_secs(void)
 {
-    struct timeval tv;
-    LIBCALL_CHECK_RET(gettimeofday(&tv, 0));
+    #if defined(_MSC_VER) && defined(_WIN32)
+    {
+        /* there's no gettimeofday for Windows, so we'll use system time */
+        #define EPOCH_DIFF 11644473600LL
+        FILETIME currentFileTime;
+        GetSystemTimePreciseAsFileTime(&currentFileTime);
 
-    return (double)tv.tv_sec + (double)tv.tv_usec / 1000000;
+        ULARGE_INTEGER uli = { 0, 0 };
+        uli.LowPart = currentFileTime.dwLowDateTime;
+        uli.HighPart = currentFileTime.dwHighDateTime;
+
+        /* Convert to seconds since Unix epoch */
+        return (double)((uli.QuadPart - EPOCH_DIFF * 10000000) / 10000000);
+    }
+    #else
+    {
+        struct timeval tv;
+        LIBCALL_CHECK_RET(gettimeofday(&tv, 0));
+
+        return (double)tv.tv_sec + (double)tv.tv_usec / 1000000;
+    }
+    #endif
 }
 #endif