1 files changed, 83 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/os2/os2rng.c b/nsprpub/pr/src/md/os2/os2rng.c
new file mode 100644
index 0000000000..aaa9693817
--- /dev/null
+++ b/nsprpub/pr/src/md/os2/os2rng.c
@@ -0,0 +1,83 @@
+/* -*- 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/. */
+
+
+#define INCL_DOS
+#define INCL_DOSERRORS
+#include <os2.h>
+#include <stdlib.h>
+#include <time.h>
+#include "primpl.h"
+
+static BOOL clockTickTime(unsigned long *phigh, unsigned long *plow)
+{
+    APIRET rc = NO_ERROR;
+    QWORD qword = {0,0};
+
+    rc = DosTmrQueryTime(&qword);
+    if (rc != NO_ERROR) {
+        return FALSE;
+    }
+
+    *phigh = qword.ulHi;
+    *plow  = qword.ulLo;
+
+    return TRUE;
+}
+
+extern PRSize _PR_MD_GetRandomNoise(void *buf, PRSize size )
+{
+    unsigned long high = 0;
+    unsigned long low  = 0;
+    clock_t val = 0;
+    int n = 0;
+    int nBytes = 0;
+    time_t sTime;
+
+    if (size <= 0) {
+        return 0;
+    }
+
+    clockTickTime(&high, &low);
+
+    /* get the maximally changing bits first */
+    nBytes = sizeof(low) > size ? size : sizeof(low);
+    memcpy(buf, &low, nBytes);
+    n += nBytes;
+    size -= nBytes;
+
+    if (size <= 0) {
+        return n;
+    }
+
+    nBytes = sizeof(high) > size ? size : sizeof(high);
+    memcpy(((char *)buf) + n, &high, nBytes);
+    n += nBytes;
+    size -= nBytes;
+
+    if (size <= 0) {
+        return n;
+    }
+
+    /* get the number of milliseconds that have elapsed since application started */
+    val = clock();
+
+    nBytes = sizeof(val) > size ? size : sizeof(val);
+    memcpy(((char *)buf) + n, &val, 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;
+}