[136] | 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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