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