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/* -*- 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;
}
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