130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/*
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* This handles abstract system level calls.
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*
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* MUSCLE SmartCard Development ( https://pcsclite.apdu.fr/ )
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*
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* Copyright (C) 1999
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* David Corcoran <corcoran@musclecard.com>
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* Copyright (C) 2002-2010
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* Ludovic Rousseau <ludovic.rousseau@free.fr>
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*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file
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* @brief This handles abstract system level calls.
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*/
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#include "config.h"
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#include <sys/time.h>
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#include <stdlib.h>
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#include <time.h>
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#include "misc.h"
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#include "sys_generic.h"
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/**
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* @brief Makes the current process sleep for some seconds.
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*
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* @param[in] iTimeVal Number of seconds to sleep.
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*/
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INTERNAL int SYS_Sleep(int iTimeVal)
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{
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#ifdef HAVE_NANOSLEEP
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struct timespec mrqtp;
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mrqtp.tv_sec = iTimeVal;
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mrqtp.tv_nsec = 0;
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return nanosleep(&mrqtp, NULL);
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#else
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return sleep(iTimeVal);
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#endif
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}
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/**
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* @brief Makes the current process sleep for some microseconds.
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*
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* @param[in] iTimeVal Number of microseconds to sleep.
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*/
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INTERNAL int SYS_USleep(int iTimeVal)
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{
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#ifdef HAVE_NANOSLEEP
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struct timespec mrqtp;
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mrqtp.tv_sec = iTimeVal/1000000;
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mrqtp.tv_nsec = (iTimeVal - (mrqtp.tv_sec * 1000000)) * 1000;
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return nanosleep(&mrqtp, NULL);
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#else
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struct timeval tv;
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tv.tv_sec = iTimeVal/1000000;
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tv.tv_usec = iTimeVal - (tv.tv_sec * 1000000);
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return select(0, NULL, NULL, NULL, &tv);
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#endif
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}
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/**
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* Generate a pseudo random number
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*
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* @param[in] fStart minimal value
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* @param[in] fEnd maximal value or -1 for a full range
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*
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* @return a random number between fStart and fEnd
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*/
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INTERNAL int SYS_RandomInt(int fStart, int fEnd)
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{
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int iRandNum = 0;
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if (-1 == fEnd)
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/* full int range */
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iRandNum = rand();
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else
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iRandNum = ((rand()+0.0)/RAND_MAX * (fEnd - fStart)) + fStart;
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return iRandNum;
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}
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/**
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* Initialize the random generator
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*/
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INTERNAL void SYS_InitRandom(void)
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{
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struct timeval tv;
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struct timezone tz;
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long myseed = 0;
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tz.tz_minuteswest = 0;
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tz.tz_dsttime = 0;
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if (gettimeofday(&tv, &tz) == 0)
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{
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myseed = tv.tv_usec;
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} else
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{
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myseed = (long) time(NULL);
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}
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srand(myseed);
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}
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