diff options
Diffstat (limited to '3rdparty/SDL2/src/test/SDL_test_random.c')
-rw-r--r-- | 3rdparty/SDL2/src/test/SDL_test_random.c | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/3rdparty/SDL2/src/test/SDL_test_random.c b/3rdparty/SDL2/src/test/SDL_test_random.c deleted file mode 100644 index c5baaa640f3..00000000000 --- a/3rdparty/SDL2/src/test/SDL_test_random.c +++ /dev/null @@ -1,94 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> - - This software is provided 'as-is', without any express or implied - warranty. In no event will the authors be held liable for any damages - arising from the use of this software. - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute it - freely, subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you must not - claim that you wrote the original software. If you use this software - in a product, an acknowledgment in the product documentation would be - appreciated but is not required. - 2. Altered source versions must be plainly marked as such, and must not be - misrepresented as being the original software. - 3. This notice may not be removed or altered from any source distribution. -*/ - -/* - - A portable "32-bit Multiply with carry" random number generator. - - Used by the fuzzer component. - Original source code contributed by A. Schiffler for GSOC project. - -*/ - -#include "SDL_config.h" - -#include <stdlib.h> -#include <stdio.h> -#include <time.h> - -#include "SDL_test.h" - -/* Initialize random number generator with two integer variables */ - -void SDLTest_RandomInit(SDLTest_RandomContext * rndContext, unsigned int xi, unsigned int ci) -{ - if (rndContext==NULL) return; - - /* - * Choose a value for 'a' from this list - * 1791398085 1929682203 1683268614 1965537969 1675393560 - * 1967773755 1517746329 1447497129 1655692410 1606218150 - * 2051013963 1075433238 1557985959 1781943330 1893513180 - * 1631296680 2131995753 2083801278 1873196400 1554115554 - */ - rndContext->a = 1655692410; - rndContext->x = 30903; - rndContext->c = 0; - if (xi != 0) { - rndContext->x = xi; - } - rndContext->c = ci; - rndContext->ah = rndContext->a >> 16; - rndContext->al = rndContext->a & 65535; -} - -/* Initialize random number generator from system time */ - -void SDLTest_RandomInitTime(SDLTest_RandomContext * rndContext) -{ - int a, b; - - if (rndContext==NULL) return; - - srand((unsigned int)time(NULL)); - a=rand(); - srand(clock()); - b=rand(); - SDLTest_RandomInit(rndContext, a, b); -} - -/* Returns random numbers */ - -unsigned int SDLTest_Random(SDLTest_RandomContext * rndContext) -{ - unsigned int xh, xl; - - if (rndContext==NULL) return -1; - - xh = rndContext->x >> 16, xl = rndContext->x & 65535; - rndContext->x = rndContext->x * rndContext->a + rndContext->c; - rndContext->c = - xh * rndContext->ah + ((xh * rndContext->al) >> 16) + - ((xl * rndContext->ah) >> 16); - if (xl * rndContext->al >= (~rndContext->c + 1)) - rndContext->c++; - return (rndContext->x); -} |