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/include/SDL3/SDL_bits.h | 147 ------------------------------ 1 file changed, 147 deletions(-) delete mode 100644 contrib/SDL-3.2.8/include/SDL3/SDL_bits.h (limited to 'contrib/SDL-3.2.8/include/SDL3/SDL_bits.h') diff --git a/contrib/SDL-3.2.8/include/SDL3/SDL_bits.h b/contrib/SDL-3.2.8/include/SDL3/SDL_bits.h deleted file mode 100644 index 7435ce6..0000000 --- a/contrib/SDL-3.2.8/include/SDL3/SDL_bits.h +++ /dev/null @@ -1,147 +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. -*/ - -/** - * # CategoryBits - * - * Functions for fiddling with bits and bitmasks. - */ - -#ifndef SDL_bits_h_ -#define SDL_bits_h_ - -#include - -#include -/* Set up for C function definitions, even when using C++ */ -#ifdef __cplusplus -extern "C" { -#endif - -#if defined(__WATCOMC__) && defined(__386__) -extern __inline int _SDL_bsr_watcom(Uint32); -#pragma aux _SDL_bsr_watcom = \ - "bsr eax, eax" \ - parm [eax] nomemory \ - value [eax] \ - modify exact [eax] nomemory; -#endif - -/** - * Get the index of the most significant (set) bit in a 32-bit number. - * - * Result is undefined when called with 0. This operation can also be stated - * as "count leading zeroes" and "log base 2". - * - * Note that this is a forced-inline function in a header, and not a public - * API function available in the SDL library (which is to say, the code is - * embedded in the calling program and the linker and dynamic loader will not - * be able to find this function inside SDL itself). - * - * \param x the 32-bit value to examine. - * \returns the index of the most significant bit, or -1 if the value is 0. - * - * \threadsafety It is safe to call this function from any thread. - * - * \since This function is available since SDL 3.2.0. - */ -SDL_FORCE_INLINE int SDL_MostSignificantBitIndex32(Uint32 x) -{ -#if defined(__GNUC__) && (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)) - /* Count Leading Zeroes builtin in GCC. - * http://gcc.gnu.org/onlinedocs/gcc-4.3.4/gcc/Other-Builtins.html - */ - if (x == 0) { - return -1; - } - return 31 - __builtin_clz(x); -#elif defined(__WATCOMC__) && defined(__386__) - if (x == 0) { - return -1; - } - return _SDL_bsr_watcom(x); -#elif defined(_MSC_VER) && _MSC_VER >= 1400 - unsigned long index; - if (_BitScanReverse(&index, x)) { - return (int)index; - } - return -1; -#else - /* Based off of Bit Twiddling Hacks by Sean Eron Anderson - * , released in the public domain. - * http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog - */ - const Uint32 b[] = {0x2, 0xC, 0xF0, 0xFF00, 0xFFFF0000}; - const int S[] = {1, 2, 4, 8, 16}; - - int msbIndex = 0; - int i; - - if (x == 0) { - return -1; - } - - for (i = 4; i >= 0; i--) - { - if (x & b[i]) - { - x >>= S[i]; - msbIndex |= S[i]; - } - } - - return msbIndex; -#endif -} - -/** - * Determine if a unsigned 32-bit value has exactly one bit set. - * - * If there are no bits set (`x` is zero), or more than one bit set, this - * returns false. If any one bit is exclusively set, this returns true. - * - * Note that this is a forced-inline function in a header, and not a public - * API function available in the SDL library (which is to say, the code is - * embedded in the calling program and the linker and dynamic loader will not - * be able to find this function inside SDL itself). - * - * \param x the 32-bit value to examine. - * \returns true if exactly one bit is set in `x`, false otherwise. - * - * \threadsafety It is safe to call this function from any thread. - * - * \since This function is available since SDL 3.2.0. - */ -SDL_FORCE_INLINE bool SDL_HasExactlyOneBitSet32(Uint32 x) -{ - if (x && !(x & (x - 1))) { - return true; - } - return false; -} - -/* Ends C function definitions when using C++ */ -#ifdef __cplusplus -} -#endif -#include - -#endif /* SDL_bits_h_ */ -- cgit v1.2.3