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Diffstat (limited to 'externals/zycore/include/Zycore/Defines.h')
| -rw-r--r-- | externals/zycore/include/Zycore/Defines.h | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/externals/zycore/include/Zycore/Defines.h b/externals/zycore/include/Zycore/Defines.h new file mode 100644 index 00000000..65afbaa3 --- /dev/null +++ b/externals/zycore/include/Zycore/Defines.h @@ -0,0 +1,443 @@ +/*************************************************************************************************** + + Zyan Core Library (Zycore-C) + + Original Author : Florian Bernd, Joel Hoener + + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + +***************************************************************************************************/ + +/** + * @file + * General helper and platform detection macros. + */ + +#ifndef ZYCORE_DEFINES_H +#define ZYCORE_DEFINES_H + +/* ============================================================================================== */ +/* Meta macros */ +/* ============================================================================================== */ + +/** + * Concatenates two values using the stringify operator (`##`). + * + * @param x The first value. + * @param y The second value. + * + * @return The combined string of the given values. + */ +#define ZYAN_MACRO_CONCAT(x, y) x ## y + +/** + * Concatenates two values using the stringify operator (`##`) and expands the value to + * be used in another macro. + * + * @param x The first value. + * @param y The second value. + * + * @return The combined string of the given values. + */ +#define ZYAN_MACRO_CONCAT_EXPAND(x, y) ZYAN_MACRO_CONCAT(x, y) + +/* ============================================================================================== */ +/* Compiler detection */ +/* ============================================================================================== */ + +#if defined(__clang__) +# define ZYAN_CLANG +# define ZYAN_GNUC +#elif defined(__ICC) || defined(__INTEL_COMPILER) +# define ZYAN_ICC +#elif defined(__GNUC__) || defined(__GNUG__) +# define ZYAN_GCC +# define ZYAN_GNUC +#elif defined(_MSC_VER) +# define ZYAN_MSVC +#elif defined(__BORLANDC__) +# define ZYAN_BORLAND +#else +# define ZYAN_UNKNOWN_COMPILER +#endif + +/* ============================================================================================== */ +/* Platform detection */ +/* ============================================================================================== */ + +#if defined(_WIN32) +# define ZYAN_WINDOWS +#elif defined(__EMSCRIPTEN__) +# define ZYAN_EMSCRIPTEN +#elif defined(__APPLE__) +# define ZYAN_APPLE +# define ZYAN_POSIX +#elif defined(__linux) +# define ZYAN_LINUX +# define ZYAN_POSIX +#elif defined(__FreeBSD__) +# define ZYAN_FREEBSD +# define ZYAN_POSIX +#elif defined(sun) || defined(__sun) +# define ZYAN_SOLARIS +# define ZYAN_POSIX +#elif defined(__unix) +# define ZYAN_UNIX +# define ZYAN_POSIX +#elif defined(__posix) +# define ZYAN_POSIX +#else +# define ZYAN_UNKNOWN_PLATFORM +#endif + +/* ============================================================================================== */ +/* Kernel mode detection */ +/* ============================================================================================== */ + +#if (defined(ZYAN_WINDOWS) && defined(_KERNEL_MODE)) || \ + (defined(ZYAN_APPLE) && defined(KERNEL)) || \ + (defined(ZYAN_LINUX) && defined(__KERNEL__)) || \ + (defined(__FreeBSD_kernel__)) +# define ZYAN_KERNEL +#else +# define ZYAN_USER +#endif + +/* ============================================================================================== */ +/* Architecture detection */ +/* ============================================================================================== */ + +#if defined(_M_AMD64) || defined(__x86_64__) +# define ZYAN_X64 +#elif defined(_M_IX86) || defined(__i386__) +# define ZYAN_X86 +#elif defined(_M_ARM64) || defined(__aarch64__) +# define ZYAN_AARCH64 +#elif defined(_M_ARM) || defined(_M_ARMT) || defined(__arm__) || defined(__thumb__) +# define ZYAN_ARM +#elif defined(__EMSCRIPTEN__) + // Nothing to do, `ZYAN_EMSCRIPTEN` is both platform and arch macro for this one. +#else +# error "Unsupported architecture detected" +#endif + +/* ============================================================================================== */ +/* Debug/Release detection */ +/* ============================================================================================== */ + +#if defined(ZYAN_MSVC) || defined(ZYAN_BORLAND) +# ifdef _DEBUG +# define ZYAN_DEBUG +# else +# define ZYAN_RELEASE +# endif +#elif defined(ZYAN_GNUC) || defined(ZYAN_ICC) +# ifdef NDEBUG +# define ZYAN_RELEASE +# else +# define ZYAN_DEBUG +# endif +#else +# define ZYAN_RELEASE +#endif + +/* ============================================================================================== */ +/* Misc compatibility macros */ +/* ============================================================================================== */ + +#if defined(ZYAN_CLANG) +# define ZYAN_NO_SANITIZE(what) __attribute__((no_sanitize(what))) +#else +# define ZYAN_NO_SANITIZE(what) +#endif + +#if defined(ZYAN_MSVC) || defined(ZYAN_BORLAND) +# define ZYAN_INLINE __inline +#else +# define ZYAN_INLINE static inline +#endif + +/* ============================================================================================== */ +/* Debugging and optimization macros */ +/* ============================================================================================== */ + +/** + * Runtime debug assertion. + */ +#if defined(ZYAN_NO_LIBC) +# define ZYAN_ASSERT(condition) (void)(condition) +#elif defined(ZYAN_WINDOWS) && defined(ZYAN_KERNEL) +# include <wdm.h> +# define ZYAN_ASSERT(condition) NT_ASSERT(condition) +#else +# include <assert.h> +# define ZYAN_ASSERT(condition) assert(condition) +#endif + +/** + * Compiler-time assertion. + */ +#if __STDC_VERSION__ >= 201112L && !defined(__cplusplus) +# define ZYAN_STATIC_ASSERT(x) _Static_assert(x, #x) +#elif (defined(__cplusplus) && __cplusplus >= 201103L) || \ + (defined(__cplusplus) && defined (_MSC_VER) && (_MSC_VER >= 1600)) || \ + (defined (_MSC_VER) && (_MSC_VER >= 1800)) +# define ZYAN_STATIC_ASSERT(x) static_assert(x, #x) +#else +# define ZYAN_STATIC_ASSERT(x) \ + typedef int ZYAN_MACRO_CONCAT_EXPAND(ZYAN_SASSERT_, __COUNTER__) [(x) ? 1 : -1] +#endif + +/** + * Marks the current code path as unreachable. + */ +#if defined(ZYAN_RELEASE) +# if defined(ZYAN_CLANG) // GCC eagerly evals && RHS, we have to use nested ifs. +# if __has_builtin(__builtin_unreachable) +# define ZYAN_UNREACHABLE __builtin_unreachable() +# else +# define ZYAN_UNREACHABLE for(;;) +# endif +# elif defined(ZYAN_GCC) && ((__GNUC__ == 4 && __GNUC_MINOR__ > 4) || __GNUC__ > 4) +# define ZYAN_UNREACHABLE __builtin_unreachable() +# elif defined(ZYAN_ICC) +# ifdef ZYAN_WINDOWS +# include <stdlib.h> // "missing return statement" workaround +# define ZYAN_UNREACHABLE __assume(0); (void)abort() +# else +# define ZYAN_UNREACHABLE __builtin_unreachable() +# endif +# elif defined(ZYAN_MSVC) +# define ZYAN_UNREACHABLE __assume(0) +# else +# define ZYAN_UNREACHABLE for(;;) +# endif +#elif defined(ZYAN_NO_LIBC) +# define ZYAN_UNREACHABLE for(;;) +#elif defined(ZYAN_WINDOWS) && defined(ZYAN_KERNEL) +# define ZYAN_UNREACHABLE { __fastfail(0); for(;;){} } +#else +# include <stdlib.h> +# define ZYAN_UNREACHABLE { assert(0); abort(); } +#endif + +/* ============================================================================================== */ +/* Utils */ +/* ============================================================================================== */ + +/* ---------------------------------------------------------------------------------------------- */ +/* General purpose */ +/* ---------------------------------------------------------------------------------------------- */ + +/** + * Marks the specified parameter as unused. + * + * @param x The name of the unused parameter. + */ +#define ZYAN_UNUSED(x) (void)(x) + +/** + * Intentional fallthrough. + */ +#if defined(ZYAN_GCC) && __GNUC__ >= 7 +# define ZYAN_FALLTHROUGH __attribute__((fallthrough)) +#else +# define ZYAN_FALLTHROUGH +#endif + +/** + * Declares a bitfield. + * + * @param x The size (in bits) of the bitfield. + */ +#define ZYAN_BITFIELD(x) : x + +/** + * Marks functions that require libc (cannot be used with `ZYAN_NO_LIBC`). + */ +#define ZYAN_REQUIRES_LIBC + +/** + * Decorator for `printf`-style functions. + * + * @param format_index The 1-based index of the format string parameter. + * @param first_to_check The 1-based index of the format arguments parameter. + */ +#if defined(__RESHARPER__) +# define ZYAN_PRINTF_ATTR(format_index, first_to_check) \ + [[gnu::format(printf, format_index, first_to_check)]] +#elif defined(ZYAN_GCC) +# define ZYAN_PRINTF_ATTR(format_index, first_to_check) \ + __attribute__((format(printf, format_index, first_to_check))) +#else +# define ZYAN_PRINTF_ATTR(format_index, first_to_check) +#endif + +/** + * Decorator for `wprintf`-style functions. + * + * @param format_index The 1-based index of the format string parameter. + * @param first_to_check The 1-based index of the format arguments parameter. + */ +#if defined(__RESHARPER__) +# define ZYAN_WPRINTF_ATTR(format_index, first_to_check) \ + [[rscpp::format(wprintf, format_index, first_to_check)]] +#else +# define ZYAN_WPRINTF_ATTR(format_index, first_to_check) +#endif + +/* ---------------------------------------------------------------------------------------------- */ +/* Arrays */ +/* ---------------------------------------------------------------------------------------------- */ + +/** + * Returns the length (number of elements) of an array. + * + * @param a The name of the array. + * + * @return The number of elements of the given array. + */ +#define ZYAN_ARRAY_LENGTH(a) (sizeof(a) / sizeof((a)[0])) + +/* ---------------------------------------------------------------------------------------------- */ +/* Arithmetic */ +/* ---------------------------------------------------------------------------------------------- */ + +/** + * Returns the smaller value of `a` or `b`. + * + * @param a The first value. + * @param b The second value. + * + * @return The smaller value of `a` or `b`. + */ +#define ZYAN_MIN(a, b) (((a) < (b)) ? (a) : (b)) + +/** + * Returns the bigger value of `a` or `b`. + * + * @param a The first value. + * @param b The second value. + * + * @return The bigger value of `a` or `b`. + */ +#define ZYAN_MAX(a, b) (((a) > (b)) ? (a) : (b)) + +/** + * Returns the absolute value of `a`. + * + * @param a The value. + * + * @return The absolute value of `a`. + */ +#define ZYAN_ABS(a) (((a) < 0) ? -(a) : (a)) + +/** + * Checks, if the given value is a power of 2. + * + * @param x The value. + * + * @return `ZYAN_TRUE`, if the given value is a power of 2 or `ZYAN_FALSE`, if not. + * + * Note that this macro always returns `ZYAN_TRUE` for `x == 0`. + */ +#define ZYAN_IS_POWER_OF_2(x) (((x) & ((x) - 1)) == 0) + +/** + * Checks, if the given value is properly aligned. + * + * Note that this macro only works for powers of 2. + */ +#define ZYAN_IS_ALIGNED_TO(x, align) (((x) & ((align) - 1)) == 0) + +/** + * Aligns the value to the nearest given alignment boundary (by rounding it up). + * + * @param x The value. + * @param align The desired alignment. + * + * @return The aligned value. + * + * Note that this macro only works for powers of 2. + */ +#define ZYAN_ALIGN_UP(x, align) (((x) + (align) - 1) & ~((align) - 1)) + +/** + * Aligns the value to the nearest given alignment boundary (by rounding it down). + * + * @param x The value. + * @param align The desired alignment. + * + * @return The aligned value. + * + * Note that this macro only works for powers of 2. + */ +#define ZYAN_ALIGN_DOWN(x, align) (((x) - 1) & ~((align) - 1)) + +/* ---------------------------------------------------------------------------------------------- */ +/* Bit operations */ +/* ---------------------------------------------------------------------------------------------- */ + +/* + * Checks, if the bit at index `b` is required to present the ordinal value `n`. + * + * @param n The ordinal value. + * @param b The bit index. + * + * @return `ZYAN_TRUE`, if the bit at index `b` is required to present the ordinal value `n` or + * `ZYAN_FALSE`, if not. + * + * Note that this macro always returns `ZYAN_FALSE` for `n == 0`. + */ +#define ZYAN_NEEDS_BIT(n, b) (((unsigned long)(n) >> (b)) > 0) + +/* + * Returns the number of bits required to represent the ordinal value `n`. + * + * @param n The ordinal value. + * + * @return The number of bits required to represent the ordinal value `n`. + * + * Note that this macro returns `0` for `n == 0`. + */ +#define ZYAN_BITS_TO_REPRESENT(n) \ + ( \ + ZYAN_NEEDS_BIT(n, 0) + ZYAN_NEEDS_BIT(n, 1) + \ + ZYAN_NEEDS_BIT(n, 2) + ZYAN_NEEDS_BIT(n, 3) + \ + ZYAN_NEEDS_BIT(n, 4) + ZYAN_NEEDS_BIT(n, 5) + \ + ZYAN_NEEDS_BIT(n, 6) + ZYAN_NEEDS_BIT(n, 7) + \ + ZYAN_NEEDS_BIT(n, 8) + ZYAN_NEEDS_BIT(n, 9) + \ + ZYAN_NEEDS_BIT(n, 10) + ZYAN_NEEDS_BIT(n, 11) + \ + ZYAN_NEEDS_BIT(n, 12) + ZYAN_NEEDS_BIT(n, 13) + \ + ZYAN_NEEDS_BIT(n, 14) + ZYAN_NEEDS_BIT(n, 15) + \ + ZYAN_NEEDS_BIT(n, 16) + ZYAN_NEEDS_BIT(n, 17) + \ + ZYAN_NEEDS_BIT(n, 18) + ZYAN_NEEDS_BIT(n, 19) + \ + ZYAN_NEEDS_BIT(n, 20) + ZYAN_NEEDS_BIT(n, 21) + \ + ZYAN_NEEDS_BIT(n, 22) + ZYAN_NEEDS_BIT(n, 23) + \ + ZYAN_NEEDS_BIT(n, 24) + ZYAN_NEEDS_BIT(n, 25) + \ + ZYAN_NEEDS_BIT(n, 26) + ZYAN_NEEDS_BIT(n, 27) + \ + ZYAN_NEEDS_BIT(n, 28) + ZYAN_NEEDS_BIT(n, 29) + \ + ZYAN_NEEDS_BIT(n, 30) + ZYAN_NEEDS_BIT(n, 31) \ + ) + +/* ---------------------------------------------------------------------------------------------- */ + +/* ============================================================================================== */ + +#endif /* ZYCORE_DEFINES_H */ |