Descent3/misc/psrand.cpp
GravisZro fb74b66bdf Fix RAND_MAX overflow errors
In `psrand.h` it attempts to undefine RAND_MAX and then redefine it.
This may work on some compilers but G++/Clang. To resolve this error
RAND_MAX was renamed to D3_RAND_MAX but **only** in files that
included `psrand.h`. The code behavior should restored to that of the
official release.
2024-05-23 20:51:25 -04:00

46 lines
1.3 KiB
C++

/*
* Descent 3
* Copyright (C) 2024 Parallax Software
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
--- HISTORICAL COMMENTS FOLLOW ---
* $Logfile: /DescentIII/Main/misc/psrand.cpp $
* $Revision: 2 $
* $Date: 4/21/99 11:05a $
* $Author: Kevin $
*
* Outrage random number generator code
*
* $Log: /DescentIII/Main/misc/psrand.cpp $
*
* 2 4/21/99 11:05a Kevin
* new ps_rand and ps_srand to replace rand & srand
*
* 1 4/21/99 10:16a Kevin
*
* $NoKeywords: $
*/
#include "psrand.h"
static int32_t ps_holdrand = 1L;
// These are adapted from the C runtime lib. Pretty simple.
void ps_srand(uint32_t seed) { ps_holdrand = static_cast<int32_t>(seed); }
int32_t ps_rand(void) { return (((ps_holdrand = ps_holdrand * 214013L + 2531011L) >> 16) & 0x7fff); }