clamp.h File Reference

Utility header to clamp a value to a bounded range. More...

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Macros
#define	DEFINE_CLAMP(type, name)
#define	CLAMP(input, lower_bound, upper_bound)

Detailed Description

Utility header to clamp a value to a bounded range.

Typesafe, supporting ints and floats. Integer promotions also cover int8_t, uint8_t, int16_t, uint16_t

Author

Irving Wang (irvin.nosp@m.gw@p.nosp@m.urdue.nosp@m..edu)

Macro Definition Documentation

CLAMP

#define CLAMP	(		input,
			lower_bound,
			upper_bound )

Value:

    _Generic((input) + (lower_bound) + (upper_bound), \
    int: clamp_int, \
    unsigned int: clamp_uint, \
    long: clamp_long, \
    unsigned long: clamp_ulong, \
    float: clamp_float \
)(input, lower_bound, upper_bound)

DEFINE_CLAMP

#define DEFINE_CLAMP	(		type,
			name )

Value:

[[gnu::always_inline]]                                                \
static inline type clamp_##name(type input, type lower, type upper) {  \
    if (input < lower) return lower;                                  \
    if (input > upper) return upper;                                  \
    return input;                                                     \
}