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43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <inttypes.h>
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// ratio32 - uint32 as a real number between 0 and 1
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#define RATIO32_MIN 0
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#define RATIO32_MAX 65535
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static inline uint32_t ratio32_mul(uint32_t a, uint32_t b) {
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return (a * b) / RATIO32_MAX;
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}
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static inline uint32_t ratio32_div(uint32_t a, uint32_t b) {
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return (a * RATIO32_MAX) / b;
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}
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//! Converts a ratio32 to a percent in the range [0, 100]
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static inline uint32_t ratio32_to_percent(uint32_t ratio) {
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return (ratio * 100) / RATIO32_MAX;
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}
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//! Converts a percent in the range [0, 100] to a ratio32
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static inline uint32_t ratio32_from_percent(uint32_t percent) {
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return (percent * RATIO32_MAX) / 100 + 1;
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}
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