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-rw-r--r--nsprpub/pr/src/md/os2/os2rng.c83
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;
+}