mirror of
https://github.com/xcp-ng/xenadmin.git
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508 lines
18 KiB
C#
508 lines
18 KiB
C#
/* Copyright (c) Cloud Software Group, Inc.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Globalization;
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namespace XenAdmin
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{
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public enum RoundingBehaviour
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{
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Up, Down, Nearest, None
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}
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/// <summary>
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/// Miscellaneous utility functions
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/// </summary>
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public static class Util
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{
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public const long BINARY_KILO = 1024;
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public const long BINARY_MEGA = BINARY_KILO * BINARY_KILO;
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public const long BINARY_GIGA = BINARY_KILO * BINARY_MEGA;
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public const long BINARY_TERA = BINARY_KILO * BINARY_GIGA;
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public const long BINARY_PETA = BINARY_KILO * BINARY_TERA;
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public const long DEC_KILO = 1000;
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public const long DEC_MEGA = DEC_KILO * DEC_KILO;
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public const long DEC_GIGA = DEC_KILO * DEC_MEGA;
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public const long DEC_TERA = DEC_KILO * DEC_GIGA;
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/// <summary>
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/// The default iSCSI filer port.
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/// </summary>
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public const UInt16 DEFAULT_ISCSI_PORT = 3260;
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public static string MemorySizeStringSuitableUnits(double bytes, bool showPoint0Decimal)
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{
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if (bytes >= 1 * BINARY_GIGA)
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{
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string format = Messages.VAL_GB_ONE_DECIMAL;
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int dp = 1;
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double valGB = bytes / BINARY_GIGA;
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if (valGB > 100)
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{
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dp = 0;
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format = Messages.VAL_GB;
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}
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if(!showPoint0Decimal)
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{
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format = Messages.VAL_GB;
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}
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return string.Format(format, Math.Round(valGB, dp, MidpointRounding.AwayFromZero));
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}
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else if (bytes >= 1 * BINARY_MEGA)
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{
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return string.Format(Messages.VAL_MB, Math.Round(bytes / BINARY_MEGA));
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}
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else if (bytes >= 1 * BINARY_KILO)
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{
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return string.Format(Messages.VAL_KB, Math.Round(bytes / BINARY_KILO));
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}
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if(bytes == 0)
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{
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return bytes.ToString();
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}
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else
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{
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return string.Format(Messages.VAL_B, bytes);
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}
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}
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/// <summary>
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/// Returns the string in suitable units and when the number of bytes is 0 the units are the ones given in formatStringWhenZero.
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/// E.g. : if bytes = 0, showPoint0Decimal = false, formatStringWhenZero = Messages.VAL_MB, then the function will return "0 MB".
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/// </summary>
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/// <param name="bytes"></param>
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/// <param name="showPoint0Decimal"></param>
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/// <param name="formatStringWhenZero"></param>
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/// <returns></returns>
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public static string MemorySizeStringSuitableUnits(double bytes, bool showPoint0Decimal, string formatStringWhenZero)
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{
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if (bytes == 0)
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{
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return string.Format(formatStringWhenZero, bytes);
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}
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else
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{
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return MemorySizeStringSuitableUnits(bytes, showPoint0Decimal);
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}
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}
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public static string DataRateString(double bytesPerSec)
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{
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string unit;
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string value = ByteSizeString(bytesPerSec, 1, true, out unit);
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return string.Format(Messages.VAL_FORMAT, value, unit);
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}
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public static string DataRateValue(double bytesPerSec, out string unit)
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{
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return ByteSizeString(bytesPerSec, 1, true, out unit);
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}
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public static string DiskSizeString(ulong bytes)
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{
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string value = ByteSizeString(bytes, 1, false, out var unit);
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return string.Format(Messages.VAL_FORMAT, value, unit);
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}
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public static string DiskSizeString(long bytes, string format = null)
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{
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return DiskSizeString(bytes, 1, format);
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}
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public static string DiskSizeString(long bytes, int dp, string format = null)
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{
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ulong abs = (ulong)Math.Abs(bytes);
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string unit;
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string value = ByteSizeString(abs, dp, false, out unit, format);
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return string.Format(Messages.VAL_FORMAT, value, unit);
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}
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public static string DiskSizeStringWithoutUnits(long bytes)
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{
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return ByteSizeString(bytes, 1, false, out _);
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}
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public static string MemorySizeStringVariousUnits(double bytes)
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{
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string unit;
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string value = ByteSizeString(bytes, 0, false, out unit);
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return string.Format(Messages.VAL_FORMAT, value, unit);
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}
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public static string MemorySizeValueVariousUnits(double bytes, out string unit)
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{
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return ByteSizeString(bytes, 0, false, out unit);
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}
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private static string ByteSizeString(double bytes, int decPlaces, bool isRate, out string unit, string format = null)
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{
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if (isRate)
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{
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if (bytes >= DEC_TERA)
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{
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unit = Messages.VAL_TERRATE;
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var result = Math.Round(bytes / DEC_TERA, decPlaces);
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return string.IsNullOrEmpty(format) ? result.ToString() : result.ToString(format);
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}
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if (bytes >= DEC_GIGA)
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{
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unit = Messages.VAL_GIGRATE;
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var result = Math.Round(bytes / DEC_GIGA, decPlaces);
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return string.IsNullOrEmpty(format) ? result.ToString() : result.ToString(format);
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}
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if (bytes >= DEC_MEGA)
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{
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unit = Messages.VAL_MEGRATE;
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var result = Math.Round(bytes / DEC_MEGA, decPlaces);
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return string.IsNullOrEmpty(format) ? result.ToString() : result.ToString(format);
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}
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if (bytes >= DEC_KILO)
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{
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unit = Messages.VAL_KILRATE;
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var result = Math.Round(bytes / DEC_KILO, decPlaces);
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return string.IsNullOrEmpty(format) ? result.ToString() : result.ToString(format);
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}
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unit = Messages.VAL_RATE;
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return bytes.ToString();
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}
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if (bytes >= BINARY_TERA)
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{
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unit = Messages.VAL_TERB;
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var result = Math.Round(bytes / BINARY_TERA, decPlaces);
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return string.IsNullOrEmpty(format) ? result.ToString() : result.ToString(format);
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}
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if (bytes >= BINARY_GIGA)
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{
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unit = Messages.VAL_GIGB;
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var result = Math.Round(bytes / BINARY_GIGA, decPlaces);
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return string.IsNullOrEmpty(format) ? result.ToString() : result.ToString(format);
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}
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if (bytes >= BINARY_MEGA)
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{
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unit = Messages.VAL_MEGB;
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var result = Math.Round(bytes / BINARY_MEGA, decPlaces);
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return string.IsNullOrEmpty(format) ? result.ToString() : result.ToString(format);
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}
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if (bytes >= BINARY_KILO)
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{
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unit = Messages.VAL_KILB;
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var result = Math.Round(bytes / BINARY_KILO, decPlaces);
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return string.IsNullOrEmpty(format) ? result.ToString() : result.ToString(format);
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}
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unit = Messages.VAL_BYTE;
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return bytes.ToString();
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}
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/// <summary>
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/// nothing actually is measured in nanoseconds, we actually output microseconds
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/// </summary>
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public static string NanoSecondsString(double t)
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{
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string unit;
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string value = NanoSecondsValue(t, out unit);
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return string.Format(Messages.VAL_FORMAT_SECONDS, value, unit);
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}
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public static string NanoSecondsValue(double t, out string unit)
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{
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if (t >= DEC_GIGA)
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{
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unit = Messages.VAL_SEC;
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return (t / DEC_GIGA).ToString("0");
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}
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if (t >= DEC_MEGA)
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{
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unit = Messages.VAL_MILSEC;
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return (t / DEC_MEGA).ToString("0");
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}
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if (t >= DEC_KILO)
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{
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unit = Messages.VAL_MICSEC;
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return (t / DEC_KILO).ToString("0");
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}
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unit = Messages.VAL_NANOSEC;
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return t.ToString("0");
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}
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public static string MilliWattString(double t)
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{
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string unit;
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string value = MilliWattValue(t, out unit);
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return string.Format(Messages.VAL_FORMAT, value, unit);
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}
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public static string MilliWattValue(double t, out string unit)
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{
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if (t >= DEC_GIGA)
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{
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unit = Messages.VAL_MWATT;
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return (t / DEC_GIGA).ToString("0");
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}
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if (t >= DEC_MEGA)
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{
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unit = Messages.VAL_KILOWATT;
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return (t / DEC_MEGA).ToString("0");
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}
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if (t >= DEC_KILO)
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{
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unit = Messages.VAL_WATT;
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return (t / DEC_KILO).ToString("0");
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}
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unit = Messages.VAL_MILWATT;
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return t.ToString("0");
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}
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private static double DecimalAdjustment(double value, RoundingBehaviour rounding, int decimalPlaces)
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{
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int decimalsAdjustment = (int)Math.Pow(10, decimalPlaces);
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switch (rounding)
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{
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case RoundingBehaviour.None:
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return value;
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case RoundingBehaviour.Down:
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return Math.Floor(value * decimalsAdjustment) / decimalsAdjustment;
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case RoundingBehaviour.Up:
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return Math.Ceiling(value * decimalsAdjustment) / decimalsAdjustment;
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case RoundingBehaviour.Nearest:
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default:
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return (Math.Round(value, decimalPlaces, MidpointRounding.AwayFromZero));
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}
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}
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public static double ToTB(double bytes, RoundingBehaviour rounding, int decimalPlaces)
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{
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double value = bytes / BINARY_TERA;
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return DecimalAdjustment(value, rounding, decimalPlaces);
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}
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public static double ToGB(double bytes, RoundingBehaviour rounding, int decimalPlaces)
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{
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double value = bytes / BINARY_GIGA;
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return DecimalAdjustment(value, rounding, decimalPlaces);
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}
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public static double ToMB(double bytes, RoundingBehaviour rounding, int decimalPlaces = 0)
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{
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double value = bytes / BINARY_MEGA;
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return DecimalAdjustment(value, rounding, decimalPlaces);
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}
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public static double CorrectRoundingErrors(double amount)
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{
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// Special case to cope with choosing an amount that's a multiple of 0.1G but not 0.5G --
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// sending it to the server as the nearest byte and getting it back later --
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// and finding it's fractionally changed, messing up our spinner permitted ranges.
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double amountRounded = ToGB(amount, RoundingBehaviour.Nearest, 1) * BINARY_GIGA;
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double roundingDiff = amountRounded - amount;
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if (roundingDiff > -1.0 && roundingDiff < 1.0) // within 1 byte: although I think it will always be positive in the case we want to correct
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return amountRounded;
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else
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return amount;
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}
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#region DateTime Utils
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public const long TicksBefore1970 = 621355968000000000;
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public static readonly string[] Iso8601DateFormats = {"yyyyMMddTHH:mm:ssZ", "yyyy-MM-ddTHH:mm:ssZ"};
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public static readonly string[] NonIso8601DateFormats = { "yyyy-MM-dd", "yyyy.MMdd" };
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public static DateTime GetUnixMinDateTime()
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{
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return new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
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}
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public static long TicksToSecondsSince1970(long ticks)
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{
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return (long)Math.Floor(new TimeSpan(ticks - TicksBefore1970).TotalSeconds);
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}
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public static bool TryParseIso8601DateTime(string toParse, out DateTime result)
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{
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return DateTime.TryParseExact(toParse, Iso8601DateFormats, CultureInfo.InvariantCulture,
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DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal, out result);
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}
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public static bool TryParseNonIso8601DateTime(string toParse, out DateTime result)
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{
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return DateTime.TryParseExact(toParse, NonIso8601DateFormats, CultureInfo.InvariantCulture,
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DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal, out result);
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}
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public static string ToISO8601DateTime(DateTime t)
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{
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return t.ToUniversalTime().ToString(Iso8601DateFormats[0], CultureInfo.InvariantCulture);
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}
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public static double ToUnixTime(DateTime time)
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{
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TimeSpan diff = time - GetUnixMinDateTime();
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return diff.TotalSeconds;
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}
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public static DateTime FromUnixTime(double time)
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{
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DateTime bootTime = GetUnixMinDateTime();
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return bootTime.AddSeconds(time);
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}
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public static string TimeString(long t)
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{
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if (t >= 120)
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return string.Format(Messages.TIME_MINUTES, t / 60);
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if (t > 0)
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return string.Format(Messages.TIME_SECONDS, t);
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return Messages.TIME_NEGLIGIBLE;
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}
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#endregion
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internal static string GThanSize(long min)
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{
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return string.Format(Messages.GREATER_THAN, DiskSizeString(min));
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}
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internal static string LThanSize(long max)
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{
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return string.Format(Messages.LESS_THAN, DiskSizeString(max));
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}
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public static string CountsPerSecondString(double p)
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{
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return string.Format(Messages.VAL_FORMAT, p, Messages.COUNTS_PER_SEC_UNIT);
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}
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public static string SecondsPerSecondString(double p)
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{
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return string.Format(Messages.VAL_FORMAT, p, UnitStrings.SEC_PER_SEC_UNIT);
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}
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public static string MegaHertzString(double t)
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{
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string unit;
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string value = MegaHertzValue(t, out unit);
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return string.Format(Messages.VAL_FORMAT, value, unit);
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}
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public static string MegaHertzValue(double t, out string unit)
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{
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return MegaHertzValue(t, 4, out unit);
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}
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/// <summary>
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/// Converts the input value from MHz to GHz if needed, rounding it to the specified decimal places
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/// </summary>
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private static string MegaHertzValue(double t, int decPlaces, out string unit)
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{
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if (t >= DEC_KILO)
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{
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unit = Messages.VAL_GIGHZ;
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return Math.Round(t / DEC_KILO, decPlaces).ToString();
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}
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unit = Messages.VAL_MEGHZ;
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return Math.Round(t, decPlaces).ToString();
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}
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public static string PercentageString(double fraction)
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{
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return string.Format("{0}%", (fraction * 100d).ToString("0.0"));
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}
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public static void ThrowIfParameterNull(object obj, string name)
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{
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if (name == null)
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{
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throw new ArgumentNullException("name");
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}
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if (name.Length == 0)
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{
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ThrowBecauseZeroLength("name");
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}
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if (obj == null)
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{
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throw new ArgumentNullException(name);
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}
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}
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public static void ThrowIfStringParameterNullOrEmpty(string value, string name)
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{
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ThrowIfParameterNull(value, name);
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if (value.Length == 0)
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{
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ThrowBecauseZeroLength(name);
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}
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}
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private static void ThrowBecauseZeroLength(string name)
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{
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throw new ArgumentException(string.Format("{0} cannot have 0 length.", name), name);
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}
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/// <summary>
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/// Matches 1-65535 inclusive.
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/// </summary>
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/// <param name="s">The string to be parsed</param>
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/// <returns>True if the specified string contains only a valid port, otherwise false.</returns>
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public static bool IsValidPort(string s)
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{
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int port;
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if (!int.TryParse(s, out port))
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return false;
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return 0 < port && port <= 65535;
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}
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}
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}
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