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| 1 | /******************************************************************************* |
1 | /******************************************************************************* |
| 2 | 2 | ||
| 3 | MenuetOS MineSweeper |
3 | MenuetOS MineSweeper |
| 4 | Copyright (C) 2003 Ivan Poddubny |
4 | Copyright (C) 2003 Ivan Poddubny |
| 5 | 5 | ||
| 6 | This program is free software; you can redistribute it and/or modify |
6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
9 | (at your option) any later version. |
| 10 | 10 | ||
| 11 | This program is distributed in the hope that it will be useful, |
11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
14 | GNU General Public License for more details. |
| 15 | 15 | ||
| 16 | You should have received a copy of the GNU General Public License |
16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | 19 | ||
| 20 | *******************************************************************************/ |
20 | *******************************************************************************/ |
| 21 | 21 | ||
| 22 | dword generator; // random number generator - äëÿ ãåíåðàöèè ñëó÷àéíûõ ÷èñåë |
22 | dword generator; // random number generator - äëÿ ãåíåðàöèè ñëó÷àéíûõ ÷èñåë |
| 23 | 23 | ||
| 24 | :int random(int max) |
24 | inline fastcall int random( ECX) |
| 25 | // get pseudo-random number - ïîëó÷èòü ïñåâäîñëó÷àéíîå ÷èñëî |
25 | // get pseudo-random number - ïîëó÷èòü ïñåâäîñëó÷àéíîå ÷èñëî |
| - | 26 | { |
|
| - | 27 | $push ebx |
|
| 26 | { |
28 | |
| 27 | $rdtsc // eax & edx |
29 | $rdtsc // eax & edx |
| 28 | $xor eax,edx |
30 | $xor eax,edx |
| 29 | $not eax |
31 | $not eax |
| 30 | 32 | ||
| 31 | EBX = generator; |
33 | EBX = generator; |
| 32 | $ror ebx,3 |
34 | $ror ebx,3 |
| 33 | $xor ebx,0xdeadbeef |
35 | $xor ebx,0xdeadbeef |
| 34 | EBX += EAX; |
36 | EBX += EAX; |
| 35 | generator = EBX; |
37 | generator = EBX; |
| 36 | 38 | ||
| 37 | EAX += EBX; |
39 | EAX += EBX; |
| 38 | EAX = EAX % max; |
40 | EAX = EAX % ECX; |
| - | 41 | ||
| 39 | return EAX; |
42 | $pop ebx |
| 40 | } |
43 | } |
| 41 | 44 | ||
| 42 | :randomize() |
45 | inline fastcall randomize() |
| 43 | // initialize random number generator - èíèöèàëèçèðîâàòü ãåíåðàòîð ñëó÷àéíûõ ÷èñåë |
46 | // initialize random number generator - èíèöèàëèçèðîâàòü ãåíåðàòîð ñëó÷àéíûõ ÷èñåë |
| 44 | { |
47 | { |
| 45 | asm |
48 | asm |
| 46 | { |
49 | { |
| 47 | mov eax,3 |
50 | mov eax,3 |
| 48 | int 0x40 |
51 | int 0x40 |
| 49 | ror eax,16 |
52 | ror eax,16 |
| 50 | } |
53 | } |
| 51 | generator = EAX; |
54 | generator = EAX; |
| 52 | } |
55 | } |