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Annotation of nono/lib/tick.h, revision 1.1

1.1     ! root        1: //
        !             2: // nono
        !             3: // Copyright (C) 2025 nono project
        !             4: // Licensed under nono-license.txt
        !             5: //
        !             6: 
        !             7: #pragma once
        !             8: 
        !             9: #include "header.h"
        !            10: 
        !            11: // 時間単位の変換。
        !            12: constexpr uint64 psec_to_nsec(uint64 ps) { return ps / 1000U; }
        !            13: constexpr uint64 psec_to_usec(uint64 ps) { return ps / 1000'000U; }
        !            14: constexpr uint64 psec_to_msec(uint64 ps) { return ps / 1000'000'000U; }
        !            15: constexpr uint64 psec_to_sec( uint64 ps) { return ps / 1000'000'000'000ULL; }
        !            16: constexpr uint64 nsec_to_psec(uint64 ns) { return ns * 1000U; }
        !            17: constexpr uint64 nsec_to_usec(uint64 ns) { return ns / 1000U; }
        !            18: constexpr uint64 nsec_to_msec(uint64 ns) { return ns / 1000'000U; }
        !            19: constexpr uint64 nsec_to_sec( uint64 ns) { return ns / 1000'000'000U; }
        !            20: constexpr uint64 usec_to_psec(uint64 us) { return us * 1000'000U; }
        !            21: constexpr uint64 usec_to_nsec(uint64 us) { return us * 1000U; }
        !            22: constexpr uint64 usec_to_msec(uint64 us) { return us / 1000U; }
        !            23: constexpr uint64 usec_to_sec( uint64 us) { return us / 1000'000U; }
        !            24: constexpr uint64 msec_to_psec(uint64 ms) { return ms * 1000'000'000U; }
        !            25: constexpr uint64 msec_to_nsec(uint64 ms) { return ms * 1000'000U; }
        !            26: constexpr uint64 msec_to_usec(uint64 ms) { return ms * 1000U; }
        !            27: constexpr uint64 msec_to_sec( uint64 ms) { return ms / 1000U; }
        !            28: constexpr uint64  sec_to_psec(uint64 ss) { return ss * 1000'000'000'000ULL; }
        !            29: constexpr uint64  sec_to_nsec(uint64 ss) { return ss * 1000'000'000U; }
        !            30: constexpr uint64  sec_to_usec(uint64 ss) { return ss * 1000'000U; }
        !            31: constexpr uint64  sec_to_msec(uint64 ss) { return ss * 1000U; }
        !            32: 
        !            33: // 内部の単位時間は [tsec] と呼ぶ。t は特に意味はないけど tick とか。
        !            34: static constexpr uint64 TSEC_FREQUENCY = 1000'000'000U;
        !            35: 
        !            36: static constexpr uint64 PSEC_IN_SEC = 1000'000'000'000ULL;
        !            37: static constexpr uint64 NSEC_IN_SEC = 1000'000'000U;
        !            38: static constexpr uint64 USEC_IN_SEC = 1000'000U;
        !            39: static constexpr uint64 MSEC_IN_SEC = 1000U;
        !            40: 
        !            41: constexpr uint64 GCD(uint64 a, uint64 b)
        !            42: {
        !            43:        if (a == b) {
        !            44:                return a;
        !            45:        }
        !            46:        if (a < b) {
        !            47:                uint64 t = b;
        !            48:                b = a;
        !            49:                a = t;
        !            50:        }
        !            51:        uint64 d = 0;
        !            52:        do {
        !            53:                d = a % b;
        !            54:                a = b;
        !            55:                b = d;
        !            56:        } while (d != 0);
        !            57:        return a;
        !            58: }
        !            59: 
        !            60: constexpr uint64 tsec_to_xsec(uint64 ts, uint64 base)
        !            61: {
        !            62:        auto g = GCD(base, TSEC_FREQUENCY);
        !            63:        auto n = base / g;
        !            64:        auto d = TSEC_FREQUENCY / g;
        !            65:        return ts * n / d;
        !            66: }
        !            67: constexpr uint64 xsec_to_tsec(uint64 xs, uint64 base)
        !            68: {
        !            69:        auto g = GCD(base, TSEC_FREQUENCY);
        !            70:        auto n = base / g;
        !            71:        auto d = TSEC_FREQUENCY / g;
        !            72:        return xs * d / n;
        !            73: }
        !            74: 
        !            75: constexpr uint64 tsec_to_psec(uint64 ts) {
        !            76:        return tsec_to_xsec(ts, PSEC_IN_SEC);
        !            77: }
        !            78: constexpr uint64 tsec_to_nsec(uint64 ts) {
        !            79:        return tsec_to_xsec(ts, NSEC_IN_SEC);
        !            80: }
        !            81: constexpr uint64 tsec_to_usec(uint64 ts) {
        !            82:        return tsec_to_xsec(ts, USEC_IN_SEC);
        !            83: }
        !            84: constexpr uint64 tsec_to_msec(uint64 ts) {
        !            85:        return tsec_to_xsec(ts, MSEC_IN_SEC);
        !            86: }
        !            87: constexpr uint64 tsec_to_sec(uint64 ts) {
        !            88:        return tsec_to_xsec(ts, 1);
        !            89: }
        !            90: 
        !            91: constexpr uint64 psec_to_tsec(uint64 ps) {
        !            92:        return xsec_to_tsec(ps, PSEC_IN_SEC);
        !            93: }
        !            94: constexpr uint64 nsec_to_tsec(uint64 ns) {
        !            95:        return xsec_to_tsec(ns, NSEC_IN_SEC);
        !            96: }
        !            97: constexpr uint64 usec_to_tsec(uint64 us) {
        !            98:        return xsec_to_tsec(us, USEC_IN_SEC);
        !            99: }
        !           100: constexpr uint64 msec_to_tsec(uint64 ms) {
        !           101:        return xsec_to_tsec(ms, MSEC_IN_SEC);
        !           102: }
        !           103: constexpr uint64 sec_to_tsec(uint64 ss) {
        !           104:        return xsec_to_tsec(ss, 1);
        !           105: }
        !           106: 
        !           107: // ユーザ定義リテラルを使ったサフィックス
        !           108: 
        !           109: // 単位時間
        !           110: constexpr uint64 operator"" _tsec(unsigned long long ts)
        !           111: {
        !           112:        return ts;
        !           113: }
        !           114: constexpr uint64 operator"" _tsec(long double ts)
        !           115: {
        !           116:        return ts;
        !           117: }
        !           118: 
        !           119: // ナノ秒
        !           120: constexpr uint64 operator"" _nsec(unsigned long long ns)
        !           121: {
        !           122:        return nsec_to_tsec(ns);
        !           123: }
        !           124: constexpr uint64 operator"" _nsec(long double ns)
        !           125: {
        !           126:        return ns / 1e9 * TSEC_FREQUENCY;
        !           127: }
        !           128: 
        !           129: // マイクロ秒
        !           130: constexpr uint64 operator"" _usec(unsigned long long us)
        !           131: {
        !           132:        return us * 1000_nsec;
        !           133: }
        !           134: constexpr uint64 operator"" _usec(long double us)
        !           135: {
        !           136:        return us * 1000_nsec;
        !           137: }
        !           138: 
        !           139: // ミリ秒
        !           140: constexpr uint64 operator"" _msec(unsigned long long ms)
        !           141: {
        !           142:        return ms * 1000_usec;
        !           143: }
        !           144: constexpr uint64 operator"" _msec(long double ms)
        !           145: {
        !           146:        return ms * 1000_usec;
        !           147: }
        !           148: 
        !           149: // 秒
        !           150: constexpr uint64 operator"" _sec(unsigned long long sec)
        !           151: {
        !           152:        return sec * 1000_msec;
        !           153: }
        !           154: constexpr uint64 operator"" _sec(long double sec)
        !           155: {
        !           156:        return sec * 1000_msec;
        !           157: }

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