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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 | - | ||
| 22 | dword generator; // random number generator - äëÿ ãåíåðàöèè ñëó÷àéíûõ ÷èñåë |
- | |
| 23 | 21 | ||
| 24 | inline fastcall int random( ECX) |
22 | inline fastcall int random( ECX) |
| 25 | // get pseudo-random number - ïîëó÷èòü ïñåâäîñëó÷àéíîå ÷èñëî |
23 | // get pseudo-random number - ïîëó÷èòü ïñåâäîñëó÷àéíîå ÷èñëî |
| 26 | { |
24 | { |
| 27 | $push ebx |
25 | $push ebx |
| 28 | 26 | ||
| 29 | $rdtsc // eax & edx |
27 | $rdtsc // eax & edx |
| 30 | $xor eax,edx |
28 | $xor eax,edx |
| 31 | $not eax |
29 | $not eax |
| 32 | 30 | ||
| 33 | EBX = generator; |
31 | EBX = __generator; |
| 34 | $ror ebx,3 |
32 | $ror ebx,3 |
| 35 | $xor ebx,0xdeadbeef |
33 | $xor ebx,0xdeadbeef |
| 36 | EBX += EAX; |
34 | EBX += EAX; |
| 37 | generator = EBX; |
35 | __generator = EBX; |
| 38 | 36 | ||
| 39 | EAX += EBX; |
37 | EAX += EBX; |
| 40 | EAX = EAX % ECX; |
38 | EAX = EAX % ECX; |
| 41 | 39 | ||
| 42 | $pop ebx |
40 | $pop ebx |
| 43 | } |
41 | } |
| 44 | 42 | ||
| 45 | inline fastcall randomize() |
43 | inline fastcall randomize() |
| 46 | // initialize random number generator - èíèöèàëèçèðîâàòü ãåíåðàòîð ñëó÷àéíûõ ÷èñåë |
44 | // initialize random number __generator - èíèöèàëèçèðîâàòü ãåíåðàòîð ñëó÷àéíûõ ÷èñåë |
| 47 | { |
45 | { |
| 48 | asm |
46 | asm |
| 49 | { |
47 | { |
| 50 | mov eax,3 |
48 | mov eax,3 |
| 51 | int 0x40 |
49 | int 0x40 |
| 52 | ror eax,16 |
50 | ror eax,16 |
| 53 | } |
51 | } |
| 54 | generator = EAX; |
52 | __generator = EAX; |
| 55 | } |
53 | } |
| 56 | 54 | ||
| - | 55 | ||