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max.h
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#ifndef MAX_H
#define MAX_H 1
#include <limits.h>
/* Current versions of gcc and clang support -std=c2x which sets
* __STDC_VERSION__ to this placeholder value. GCC 14.1 does not set
* __STDC_VERSION__ to 202311L with the std=c23 flag, but Clang 18.1 does. */
#define C23_PLACEHOLDER 202000L
#if defined(__STDC_VERSION__) && __STDC_VERSION >= C23_PLACEHOLDER
/* gnu::const is stricter than unsequenced, but it doesn't matter here. */
#define ATTRIB_CONST [[unsequenced]]
#elif defined(__GNUC__) || defined(__clang__) || defined(__INTEL_LLVM_COMPILER)
#define ATTRIB_CONST __attribute__((const))
#else
#define ATTRIB_CONST /**/
#endif
#if defined(__GNUC__) || defined(__clang__) || defined(__INTEL_LLVM_COMPILER)
#define ATTRIB_ALWAYS_INLINE __attribute__((always_inline))
#else
#define ATTRIB_ALWAYS_INLINE /**/
#endif
#define gen_basic_max(return_type, param_type1, param_type2, suffix) \
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline return_type max_##suffix(param_type1 a, param_type2 b) \
{ return a > b ? a : b; }
gen_basic_max(int, int, int, i_i)
gen_basic_max(long, int, long, i_li)
gen_basic_max(long long, int, long long, i_lli)
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned int max_i_ui(int a, unsigned b)
{
return a < 0 ? b : (b > (unsigned) a ? b : (unsigned) a);
}
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long max_i_uli(int a, unsigned long b)
{
return a < 0 ? b : (b > (unsigned long) a ? b : (unsigned long) a);
}
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long long max_i_ulli(int a, unsigned long long b)
{
return a < 0 ? b : (b > (unsigned long long) a ? b : (unsigned long long) a);
}
#define MAX_I(a, b) _Generic((b) + 0, \
int: max_i_i, \
unsigned int: max_i_ui, \
long int: max_i_li, \
unsigned long int: max_i_uli, \
long long int: max_i_lli, \
unsigned long long int: max_i_ulli)((a), (b))
gen_basic_max(unsigned, unsigned, unsigned, ui_ui)
gen_basic_max(unsigned long, unsigned, unsigned long, ui_uli)
gen_basic_max(unsigned long long, unsigned, unsigned long long, ui_ulli)
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned max_ui_i(unsigned a, int b)
{
return max_i_ui(b, a);
}
#if LONG_MAX >= UINT_MAX
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline long max_ui_li(unsigned a, long b)
{
return (long) a > b ? (long) a : b;
}
#else
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned max_ui_li(unsigned a, long b)
{
return b < 0 ? a : (a > (unsigned) b ? a : (unsigned) b);
}
#endif
#if LLONG_MAX >= UINT_MAX
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline long long max_ui_lli(unsigned a, long long b)
{
return (long long) a > b ? (long long) a : b;
}
#else
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned max_ui_lli(unsigned a, long long b)
{
return b < 0 ? a : (a > (unsigned) b ? a : (unsigned) b);
}
#endif
#define MAX_UI(a, b) _Generic((b) + 0, \
int: max_ui_i, \
unsigned int: max_ui_ui, \
long int: max_ui_li, \
unsigned long int: max_ui_uli, \
long long int: max_ui_lli, \
unsigned long long int: max_ui_ulli)((a), (b))
gen_basic_max(long, long, int, li_i)
gen_basic_max(long, long, long, li_li)
gen_basic_max(long long, long, long long, li_lli)
#if LONG_MAX >= UINT_MAX
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline long max_li_ui(long a, unsigned b)
#else
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned max_li_ui(long a, unsigned b)
#endif
{
return max_ui_li(b, a);
}
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long max_li_uli(long a, unsigned long b)
{
return a < 0 ? b : (b > (unsigned long) a ? b : (unsigned long) a);
}
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long long max_li_ulli(long a, unsigned long long b)
{
return a < 0 ? b : (b > (unsigned long long) a ? b : (unsigned long long) a);
}
#define MAX_LI(a, b) _Generic((b) + 0, \
int: max_li_i, \
unsigned int: max_li_ui, \
long int: max_li_li, \
unsigned long int: max_li_uli, \
long long int: max_li_lli, \
unsigned long long int: max_li_ulli)((a), (b))
gen_basic_max(unsigned long, unsigned long, unsigned, uli_ui)
gen_basic_max(unsigned long, unsigned long, unsigned long, uli_uli)
gen_basic_max(unsigned long long, unsigned long, unsigned long long, uli_ulli)
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long max_uli_i(unsigned long a, int b)
{
return max_i_uli(b, a);
}
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long max_uli_li(unsigned long a, long b)
{
return max_li_uli(b, a);
}
#if LLONG_MAX >= ULONG_MAX
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline long long max_uli_lli(unsigned long a, long long b)
{
return (long long) a > b ? (long long) a : b;
}
#else
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long max_uli_lli(unsigned long a, long long b)
{
return b < 0 ? a : (a > (unsigned long) b ? a : (unsigned long) b);
}
#endif
#define MAX_ULI(a, b) _Generic((b) + 0, \
int: max_uli_i, \
unsigned int: max_uli_ui, \
long int: max_uli_li, \
unsigned long int: max_uli_uli, \
long long int: max_uli_lli, \
unsigned long long int: max_uli_ulli)((a), (b))
gen_basic_max(long long, long long, int, lli_i)
gen_basic_max(long long, long long, long, lli_li)
gen_basic_max(long long, long long, long long, lli_lli)
#if LLONG_MAX >= UINT_MAX
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline long long max_lli_ui(long long a, unsigned b)
#else
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned max_lli_ui(long long a, unsigned b)
#endif
{
return max_ui_lli(b, a);
}
#if LLONG_MAX >= ULONG_MAX
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline long long max_lli_uli(long long a, unsigned long b)
#else
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long max_lli_uli(long long a, unsigned long b)
#endif
{
return max_uli_lli(b, a);
}
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long long max_lli_ulli(long long a, unsigned long long b)
{
return a < 0 ? b : (b > (unsigned long long) a ? b : (unsigned long long) a);
}
#define MAX_LLI(a, b) _Generic((b) + 0, \
int: max_lli_i, \
unsigned int: max_lli_ui, \
long int: max_lli_li, \
unsigned long int: max_lli_uli, \
long long int: max_lli_lli, \
unsigned long long int: max_lli_ulli)((a), (b))
gen_basic_max(unsigned long long, unsigned long long, unsigned, ulli_ui)
gen_basic_max(unsigned long long, unsigned long long, unsigned long, ulli_uli)
gen_basic_max(unsigned long long, unsigned long long, unsigned long long, ulli_ulli)
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long long max_ulli_i(unsigned long long a, int b)
{
return max_i_ulli(b, a);
}
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long long max_ulli_li(unsigned long long a, long b)
{
return max_li_ulli(b, a);
}
ATTRIB_ALWAYS_INLINE ATTRIB_CONST static inline unsigned long long max_ulli_lli(unsigned long long a, long long b)
{
return max_lli_ulli(b, a);
}
#define MAX_ULLI(a, b) _Generic((b), \
int: max_ulli_i, \
unsigned int: max_ulli_ui, \
long int: max_ulli_li, \
unsigned long int: max_ulli_uli, \
long long int: max_ulli_lli, \
unsigned long long int: max_ulli_ulli)((a), (b))
#define MAX(a, b) _Generic((a) + 0, \
int: MAX_I((a), (b)), \
unsigned int: MAX_UI((a), (b)), \
long int: MAX_LI((a), (b)), \
unsigned long int: MAX_ULI((a), (b)), \
long long int: MAX_LLI((a), (b)), \
unsigned long long int: MAX_ULLI((a), (b)))
#undef ATTRIB_ALWAYS_INLINE
#undef ATTRIB_CONST
#undef C23_PLACEHOLDER
#endif /* MAX_H */