From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 nsprpub/pr/src/md/windows/w32rng.c | 75 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 nsprpub/pr/src/md/windows/w32rng.c

(limited to 'nsprpub/pr/src/md/windows/w32rng.c')

diff --git a/nsprpub/pr/src/md/windows/w32rng.c b/nsprpub/pr/src/md/windows/w32rng.c
new file mode 100644
index 000000000..633ae0da5
--- /dev/null
+++ b/nsprpub/pr/src/md/windows/w32rng.c
@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <windows.h>
+#include <time.h>
+#include <io.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <primpl.h>
+
+static BOOL
+CurrentClockTickTime(LPDWORD lpdwHigh, LPDWORD lpdwLow)
+{
+    LARGE_INTEGER   liCount;
+
+    if (!QueryPerformanceCounter(&liCount))
+        return FALSE;
+
+    *lpdwHigh = liCount.u.HighPart;
+    *lpdwLow = liCount.u.LowPart;
+    return TRUE;
+}
+
+extern PRSize _PR_MD_GetRandomNoise( void *buf, PRSize size )
+{
+    DWORD   dwHigh, dwLow, dwVal;
+    size_t  n = 0;
+    size_t  nBytes;
+    time_t  sTime;
+
+    if (size <= 0)
+        return 0;
+
+    CurrentClockTickTime(&dwHigh, &dwLow);
+
+    // get the maximally changing bits first
+    nBytes = sizeof(dwLow) > size ? size : sizeof(dwLow);
+    memcpy((char *)buf, &dwLow, nBytes);
+    n += nBytes;
+    size -= nBytes;
+
+    if (size <= 0)
+        return n;
+
+    nBytes = sizeof(dwHigh) > size ? size : sizeof(dwHigh);
+    memcpy(((char *)buf) + n, &dwHigh, nBytes);
+    n += nBytes;
+    size -= nBytes;
+
+    if (size <= 0)
+        return n;
+
+    // get the number of milliseconds that have elapsed since Windows started
+    dwVal = GetTickCount();
+
+    nBytes = sizeof(dwVal) > size ? size : sizeof(dwVal);
+    memcpy(((char *)buf) + n, &dwVal, nBytes);
+    n += nBytes;
+    size -= nBytes;
+
+    if (size <= 0)
+        return n;
+
+    // get the time in seconds since midnight Jan 1, 1970
+    time(&sTime);
+    nBytes = sizeof(sTime) > size ? size : sizeof(sTime);
+    memcpy(((char *)buf) + n, &sTime, nBytes);
+    n += nBytes;
+
+    return n;
+}
+
-- 
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