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_crc16.c | 52 -------------------------------- 1 file changed, 52 deletions(-) delete mode 100644 contrib/SDL-3.2.8/src/stdlib/SDL_crc16.c (limited to 'contrib/SDL-3.2.8/src/stdlib/SDL_crc16.c') diff --git a/contrib/SDL-3.2.8/src/stdlib/SDL_crc16.c b/contrib/SDL-3.2.8/src/stdlib/SDL_crc16.c deleted file mode 100644 index 828ce94..0000000 --- a/contrib/SDL-3.2.8/src/stdlib/SDL_crc16.c +++ /dev/null @@ -1,52 +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 16-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 Uint16 crc16_for_byte(Uint8 r) -{ - Uint16 crc = 0; - int i; - for (i = 0; i < 8; ++i) { - crc = ((crc ^ r) & 1 ? 0xA001 : 0) ^ crc >> 1; - r >>= 1; - } - return crc; -} - -Uint16 SDL_crc16(Uint16 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 = crc16_for_byte((Uint8)crc ^ ((const Uint8 *)data)[i]) ^ crc >> 8; - } - return crc; -} -- cgit v1.2.3