From 30f41c02aec763d32e62351452da9ef582bc3472 Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Fri, 6 Mar 2026 13:30:59 -0800 Subject: Move contrib libraries to contrib repo --- contrib/SDL-3.2.8/src/stdlib/SDL_crc32.c | 50 -------------------------------- 1 file changed, 50 deletions(-) delete mode 100644 contrib/SDL-3.2.8/src/stdlib/SDL_crc32.c (limited to 'contrib/SDL-3.2.8/src/stdlib/SDL_crc32.c') diff --git a/contrib/SDL-3.2.8/src/stdlib/SDL_crc32.c b/contrib/SDL-3.2.8/src/stdlib/SDL_crc32.c deleted file mode 100644 index 9c2d097..0000000 --- a/contrib/SDL-3.2.8/src/stdlib/SDL_crc32.c +++ /dev/null @@ -1,50 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2025 Sam Lantinga - - 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. -*/ -#include "SDL_internal.h" - -/* Public domain CRC implementation adapted from: - http://home.thep.lu.se/~bjorn/crc/crc32_simple.c - - This algorithm is compatible with the 32-bit CRC described here: - https://www.lammertbies.nl/comm/info/crc-calculation -*/ -/* NOTE: DO NOT CHANGE THIS ALGORITHM - There is code that relies on this in the joystick code -*/ - -static Uint32 crc32_for_byte(Uint32 r) -{ - int i; - for (i = 0; i < 8; ++i) { - r = (r & 1 ? 0 : (Uint32)0xEDB88320L) ^ r >> 1; - } - return r ^ (Uint32)0xFF000000L; -} - -Uint32 SDL_crc32(Uint32 crc, const void *data, size_t len) -{ - // As an optimization we can precalculate a 256 entry table for each byte - size_t i; - for (i = 0; i < len; ++i) { - crc = crc32_for_byte((Uint8)crc ^ ((const Uint8 *)data)[i]) ^ crc >> 8; - } - return crc; -} -- cgit v1.2.3