75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
// Functions that operate on numeric ranges
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#include <ctype.h>
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#include <err.h>
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#include <gc.h>
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#include <math.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <sys/param.h>
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#include "integers.h"
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#include "text.h"
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#include "types.h"
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#include "util.h"
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PUREFUNC static int32_t Range$compare(const void *vx, const void *vy, const TypeInfo_t *)
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{
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if (vx == vy) return 0;
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Range_t *x = (Range_t*)vx, *y = (Range_t*)vy;
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int32_t diff = Int$compare(&x->first, &y->first, &Int$info);
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if (diff != 0) return diff;
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diff = Int$compare(&x->last, &y->last, &Int$info);
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if (diff != 0) return diff;
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return Int$compare(&x->step, &y->step, &Int$info);
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}
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PUREFUNC static bool Range$equal(const void *vx, const void *vy, const TypeInfo_t*)
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{
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if (vx == vy) return true;
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Range_t *x = (Range_t*)vx, *y = (Range_t*)vy;
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return Int$equal(&x->first, &y->first, &Int$info) && Int$equal(&x->last, &y->last, &Int$info) && Int$equal(&x->step, &y->step, &Int$info);
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}
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static Text_t Range$as_text(const void *obj, bool use_color, const TypeInfo_t *)
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{
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if (!obj) return Text("Range");
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Range_t *r = (Range_t*)obj;
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Text_t first = Int$as_text(&r->first, use_color, &Int$info);
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Text_t last = Int$as_text(&r->last, use_color, &Int$info);
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Text_t step = Int$as_text(&r->step, use_color, &Int$info);
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return Text$format(use_color ? "\x1b[0;1mRange\x1b[m(first=%k, last=%k, step=%k)"
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: "Range(first=%k, last=%k, step=%k)", &first, &last, &step);
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}
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PUREFUNC public Range_t Range$reversed(Range_t r)
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{
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return (Range_t){r.last, r.first, Int$negative(r.step)};
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}
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PUREFUNC public Range_t Range$by(Range_t r, Int_t step)
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{
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return (Range_t){r.first, r.last, Int$times(step, r.step)};
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}
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static bool Range$is_none(const void *obj, const TypeInfo_t*)
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{
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return ((Range_t*)obj)->step.small == 0x1;
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}
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public const TypeInfo_t Range$info = {
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.size=sizeof(Range_t),
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.align=__alignof(Range_t),
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.metamethods={
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.as_text=Range$as_text,
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.compare=Range$compare,
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.equal=Range$equal,
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.is_none=Range$is_none,
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},
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};
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// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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