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145 lines
4.3 KiB
145 lines
4.3 KiB
#ifndef HEADER_Macros |
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#define HEADER_Macros |
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/* |
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htop - Macros.h |
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(C) 2020-2023 htop dev team |
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Released under the GNU GPLv2+, see the COPYING file |
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in the source distribution for its full text. |
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*/ |
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#include <assert.h> // IWYU pragma: keep |
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#include <math.h> |
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#include <stdbool.h> |
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#include <string.h> // IWYU pragma: keep |
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#ifndef MINIMUM |
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#define MINIMUM(a, b) ((a) < (b) ? (a) : (b)) |
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#endif |
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#ifndef MAXIMUM |
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#define MAXIMUM(a, b) ((a) > (b) ? (a) : (b)) |
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#endif |
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#ifndef CLAMP |
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#define CLAMP(x, low, high) (assert((low) <= (high)), ((x) > (high)) ? (high) : MAXIMUM(x, low)) |
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#endif |
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#ifndef ARRAYSIZE |
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#define ARRAYSIZE(x) (sizeof(x) / sizeof((x)[0])) |
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#endif |
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#ifndef SPACESHIP_NUMBER |
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#define SPACESHIP_NUMBER(a, b) (((a) > (b)) - ((a) < (b))) |
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#endif |
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#ifndef SPACESHIP_NULLSTR |
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#define SPACESHIP_NULLSTR(a, b) strcmp((a) ? (a) : "", (b) ? (b) : "") |
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#endif |
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#ifndef SPACESHIP_DEFAULTSTR |
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#define SPACESHIP_DEFAULTSTR(a, b, s) strcmp((a) ? (a) : (s), (b) ? (b) : (s)) |
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#endif |
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#ifdef __GNUC__ // defined by GCC and Clang |
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#define ATTR_FORMAT(type, index, check) __attribute__((format (type, index, check))) |
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#define ATTR_NORETURN __attribute__((noreturn)) |
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#define ATTR_UNUSED __attribute__((unused)) |
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#define ATTR_MALLOC __attribute__((malloc)) |
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#else /* __GNUC__ */ |
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#define ATTR_FORMAT(type, index, check) |
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#define ATTR_NORETURN |
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#define ATTR_UNUSED |
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#define ATTR_MALLOC |
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#endif /* __GNUC__ */ |
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#ifdef HAVE_ATTR_NONNULL |
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#define ATTR_NONNULL __attribute__((nonnull)) |
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#define ATTR_NONNULL_N(...) __attribute__((nonnull(__VA_ARGS__))) |
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#else |
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#define ATTR_NONNULL |
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#define ATTR_NONNULL_N(...) |
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#endif /* HAVE_ATTR_NONNULL */ |
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#ifdef HAVE_ATTR_ALLOC_SIZE |
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#define ATTR_ALLOC_SIZE1(a) __attribute__((alloc_size (a))) |
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#define ATTR_ALLOC_SIZE2(a, b) __attribute__((alloc_size (a, b))) |
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#else |
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#define ATTR_ALLOC_SIZE1(a) |
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#define ATTR_ALLOC_SIZE2(a, b) |
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#endif /* HAVE_ATTR_ALLOC_SIZE */ |
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#ifdef HAVE_ATTR_ACCESS |
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#define ATTR_ACCESS2(mode, ref) __attribute__((access (mode, ref))) |
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#define ATTR_ACCESS3(mode, ref, size) __attribute__((access (mode, ref, size))) |
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#else |
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#define ATTR_ACCESS2(mode, ref) |
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#define ATTR_ACCESS3(mode, ref, size) |
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#endif /* HAVE_ATTR_ACCESS */ |
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#define ATTR_ACCESS2_R(ref) ATTR_ACCESS2(read_only, ref) |
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#define ATTR_ACCESS3_R(ref, size) ATTR_ACCESS3(read_only, ref, size) |
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#define ATTR_ACCESS2_RW(ref) ATTR_ACCESS2(read_write, ref) |
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#define ATTR_ACCESS3_RW(ref, size) ATTR_ACCESS3(read_write, ref, size) |
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#define ATTR_ACCESS2_W(ref) ATTR_ACCESS2(write_only, ref) |
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#define ATTR_ACCESS3_W(ref, size) ATTR_ACCESS3(write_only, ref, size) |
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// ignore casts discarding const specifier, e.g. |
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// const char [] -> char * / void * |
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// const char *[2]' -> char *const * |
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#if defined(__clang__) |
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#define IGNORE_WCASTQUAL_BEGIN _Pragma("clang diagnostic push") \ |
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_Pragma("clang diagnostic ignored \"-Wcast-qual\"") |
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#define IGNORE_WCASTQUAL_END _Pragma("clang diagnostic pop") |
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#elif defined(__GNUC__) |
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#define IGNORE_WCASTQUAL_BEGIN _Pragma("GCC diagnostic push") \ |
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_Pragma("GCC diagnostic ignored \"-Wcast-qual\"") |
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#define IGNORE_WCASTQUAL_END _Pragma("GCC diagnostic pop") |
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#else |
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#define IGNORE_WCASTQUAL_BEGIN |
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#define IGNORE_WCASTQUAL_END |
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#endif |
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/* Cheaper function for checking NaNs. Unlike the standard isnan(), this may |
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throw an FP exception on a "signaling NaN". |
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(ISO/IEC TS 18661-1 and the C23 standard stated that isnan() throws no |
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exceptions even with a "signaling NaN") */ |
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static inline bool isNaN(double x) { |
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return !isgreaterequal(x, x); |
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} |
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/* Checks if x >= 0.0 but returns false if x is NaN. Because IEEE 754 considers |
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-0.0 == 0.0, this function treats both zeros as nonnegative. */ |
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static inline bool isNonnegative(double x) { |
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return isgreaterequal(x, 0.0); |
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} |
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/* Checks if x > 0.0 but returns false if x is NaN. */ |
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static inline bool isPositive(double x) { |
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return isgreater(x, 0.0); |
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} |
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/* This subtraction is used by Linux / NetBSD / OpenBSD for calculation of CPU usage items. */ |
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static inline unsigned long long saturatingSub(unsigned long long a, unsigned long long b) { |
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return a > b ? a - b : 0; |
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} |
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#endif
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