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git-subtree-dir: src/simplicity git-subtree-split: 86ac0f92c4b2b6d694dca85dce3b6909aed25894
34 lines
867 B
C
34 lines
867 B
C
#ifndef SIMPLICITY_BOUNDED_H
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#define SIMPLICITY_BOUNDED_H
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#include <stdbool.h>
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#include <stdint.h>
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typedef uint_least32_t ubounded;
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#define UBOUNDED_MAX UINT32_MAX
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static inline ubounded bounded_max(ubounded x, ubounded y) {
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return x <= y ? y : x;
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}
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/* Returns min(x + y, UBOUNDED_MAX) */
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static inline ubounded bounded_add(ubounded x, ubounded y) {
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return UBOUNDED_MAX < x ? UBOUNDED_MAX
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: UBOUNDED_MAX - x < y ? UBOUNDED_MAX
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: x + y;
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}
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/* *x = min(*x + 1, UBOUNDED_MAX) */
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static inline void bounded_inc(ubounded* x) {
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if (*x < UBOUNDED_MAX) (*x)++;
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}
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/* 'pad(false, a, b)' computes the PADL(a, b) function.
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* 'pad( true, a, b)' computes the PADR(a, b) function.
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*/
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static inline ubounded pad(bool right, ubounded a, ubounded b) {
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return bounded_max(a, b) - (right ? b : a);
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}
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enum { overhead = 100 }; /* milli weight units */
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#endif
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