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RIOT/sys/shell/commands/sc_mersenne.c
René Kijewski c507632e50 Use argc and argv in shell handlers
Compare #708.

Now the tokenization of an input line is done by the shell itself. You
may quote arguments with `"..."`. Empty arguments, supplied by `""` are
preserved. Spaces in between arguments are squasheds; spaces inside
quotes are preserved.

You cannot partially quote an argument. You must not use
- `cmd "abc`,
- `cmd abc"def"`, or
- `cmd "abc"def`.
2014-02-25 17:54:17 +01:00

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1010 B
C

/**
* Shell commands for mersenne twister
*
* Copyright (C) 2013 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser General
* Public License. See the file LICENSE in the top level directory for more
* details.
*
* @ingroup shell_commands
* @{
* @file sc_mersenne.c
* @brief initializes the PRNG
* @author Christian Mehlis <mehlis@inf.fu-berlin.de>
* @}
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "hwtimer.h"
#include "random.h"
void _mersenne_init(int argc, char **argv)
{
int initval;
if (argc == 1) {
initval = hwtimer_now();
printf("PRNG initialized to current time: %d\n", initval);
}
else {
initval = atoi(argv[1]);
printf("PRNG initialized given value: %d\n", initval);
}
genrand_init(initval);
}
void _mersenne_get(int argc, char **argv)
{
(void) argc;
(void) argv;
printf("%" PRIu32 "\n", genrand_uint32());
}