1 | /*
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2 | Copyright (c) 2011 Arduino. All right reserved.
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3 |
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4 | This library is free software; you can redistribute it and/or
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5 | modify it under the terms of the GNU Lesser General Public
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6 | License as published by the Free Software Foundation; either
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7 | version 2.1 of the License, or (at your option) any later version.
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8 |
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9 | This library is distributed in the hope that it will be useful,
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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12 | See the GNU Lesser General Public License for more details.
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13 |
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14 | You should have received a copy of the GNU Lesser General Public
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15 | License along with this library; if not, write to the Free Software
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16 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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17 | */
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18 |
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19 | extern "C" {
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20 | #include "stdlib.h"
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21 | #include "stdint.h"
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22 | }
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23 | #include "WMath.h"
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24 |
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25 | extern void randomSeed( uint32_t dwSeed )
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26 | {
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27 | if ( dwSeed != 0 )
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28 | {
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29 | srand( dwSeed ) ;
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30 | }
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31 | }
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32 |
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33 | extern long random( long howbig )
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34 | {
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35 | if ( howbig == 0 )
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36 | {
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37 | return 0 ;
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38 | }
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39 |
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40 | return rand() % howbig;
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41 | }
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42 |
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43 | extern long random( long howsmall, long howbig )
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44 | {
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45 | if (howsmall >= howbig)
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46 | {
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47 | return howsmall;
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48 | }
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49 |
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50 | long diff = howbig - howsmall;
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51 |
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52 | return random(diff) + howsmall;
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53 | }
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54 |
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55 | extern long map(long x, long in_min, long in_max, long out_min, long out_max)
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56 | {
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57 | return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
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58 | }
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59 |
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60 | extern uint16_t makeWord( uint16_t w )
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61 | {
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62 | return w ;
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63 | }
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64 |
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65 | extern uint16_t makeWord( uint8_t h, uint8_t l )
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66 | {
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67 | return (h << 8) | l ;
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68 | }
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