Range Macros

include/math/range.h View source View on GitHub

Structs

range

struct range {
    uint64_t  low;
    uint64_t  hi;
};

Macros

IN_RANGE

#define IN_RANGE(x, min, max) \
    ({ \
        (void) kassert((min) <= (max)); \
        (x) >= (min) && (x) <= (max); \
    })

RANGE

#define RANGE(min, max) \
    ((struct range) {.low = (uint64_t) (min), .hi = (uint64_t) (max)})

RANGE_DEFINE

#define RANGE_DEFINE(type, name) \
    struct { \
        type low; \
        type hi; \
    } name

RANGE_LEN

#define RANGE_LEN(r) (((r).hi - (r).low) + 1)

RANGE_CONTAINS

#define RANGE_CONTAINS(r, val) ((val) >= (r).low && (val) <= (r).hi)

RANGE_OVERLAPS

#define RANGE_OVERLAPS(r1, r2) ((r1).low <= (r2).hi && (r2).low <= (r1).hi)

RANGE_VALID

#define RANGE_VALID(r) ((r).low <= (r).hi)

RANGE_CLAMP

#define RANGE_CLAMP(r1, r2, out_r) \
    ((r1).low <= (r2).hi && (r2).low <= (r1).hi \
         ? ((out_r).low = ((r1).low > (r2).low) ? (r1).low : (r2).low, \
            (out_r).hi = ((r1).hi < (r2).hi) ? (r1).hi : (r2).hi, true) \
         : false)

RANGE_MERGE

#define RANGE_MERGE(r1, r2, out_r) \
    (((r1).low <= (r2).hi + 1) && ((r2).low <= (r1).hi + 1) \
         ? ((out_r).low = ((r1).low < (r2).low) ? (r1).low : (r2).low, \
            (out_r).hi = ((r1).hi > (r2).hi) ? (r1).hi : (r2).hi, true) \
         : false)

---