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3067 | leency | 1 | /******************************************************************************* |
2 | |||
3 | MenuetOS MineSweeper |
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4 | Copyright (C) 2003 Ivan Poddubny |
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5 | |||
6 | This program is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2 of the License, or |
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9 | (at your option) any later version. |
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10 | |||
11 | This program is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |||
16 | You should have received a copy of the GNU General Public License |
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17 | along with this program; if not, write to the Free Software |
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18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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19 | |||
20 | *******************************************************************************/ |
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5576 | pavelyakov | 21 | #define MASK_RAND 123456789 |
22 | #define IQ_RAND 12773 |
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23 | #define IA_RAND 16807 |
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24 | #define IR_RAND 2836 |
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25 | #define IM_RAND 2147483647 |
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26 | #define AM_RAND (1./2147483647) |
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3067 | leency | 27 | |
28 | inline fastcall int random( ECX) |
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29 | // get pseudo-random number - получить псевдослучайное число |
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30 | { |
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31 | $push ebx |
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32 | |||
33 | $rdtsc // eax & edx |
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34 | $xor eax,edx |
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35 | $not eax |
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36 | |||
5575 | pavelyakov | 37 | EBX = __generator; |
3067 | leency | 38 | $ror ebx,3 |
39 | $xor ebx,0xdeadbeef |
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40 | EBX += EAX; |
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5575 | pavelyakov | 41 | __generator = EBX; |
3067 | leency | 42 | |
43 | EAX += EBX; |
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44 | EAX = EAX % ECX; |
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45 | |||
46 | $pop ebx |
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47 | } |
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48 | |||
5582 | pavelyakov | 49 | inline long unirand0(void) |
5576 | pavelyakov | 50 | { |
51 | long k,ans,tmp,save; |
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52 | save = __generator; |
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53 | __generator^=MASK_RAND; /* avoid __generator==0 */ |
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54 | k=__generator/IQ_RAND; |
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55 | tmp=__generator-k*IQ_RAND; |
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56 | __generator*=IA_RAND*tmp; |
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57 | __generator-=IR_RAND*k; |
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58 | if(__generator<0) __generator+=IM_RAND; |
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59 | if(save == __generator) return unirand0(); |
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60 | ans=__generator; |
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61 | __generator^=MASK_RAND; /* restore unmasked dummy */ |
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62 | return ans; |
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63 | } |
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64 | |||
65 | :long RAND_A,RAND_C,RAND_TMP; |
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5582 | pavelyakov | 66 | inline long rand(signed long x1,x2) |
5576 | pavelyakov | 67 | { |
68 | long tmp,xx; |
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69 | RAND_A = __generator; |
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70 | __generator = RAND_A*__generator+RAND_C; |
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71 | RAND_C = __generator^RAND_A; |
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72 | RAND_C>>=1; |
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73 | RAND_A<<=1; |
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74 | __generator^=RAND_A; |
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75 | xx=x2; |
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76 | if(x1<0)xx+=-x1; |
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77 | tmp = __generator%xx; |
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78 | if(tmp<0)tmp=-tmp; |
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79 | tmp+=x1; |
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80 | return tmp; |
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81 | } |
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82 | |||
3067 | leency | 83 | inline fastcall randomize() |
5575 | pavelyakov | 84 | // initialize random number __generator - инициализировать генератор случайных чисел |
3067 | leency | 85 | { |
86 | asm |
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87 | { |
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88 | mov eax,3 |
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89 | int 0x40 |
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90 | ror eax,16 |
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91 | } |
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5576 | pavelyakov | 92 | //if(EAX == __generator)return randomize(); |
5575 | pavelyakov | 93 | __generator = EAX; |
94 | }0)tmp=-tmp; |
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95 |