172 lines
3.2 KiB
C#
172 lines
3.2 KiB
C#
//--------------------------------------------------
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// Motion Framework
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// Copyright©2018-2020 何冠峰
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// Licensed under the MIT license
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//--------------------------------------------------
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using System;
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using System.Text;
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namespace MotionFramework.IO
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{
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/// </summary>
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/// 字符串操作类
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/// 注意：Span<T>需要C# 7.2支持
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/// </summary>
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public static class StringOperate
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{
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private static string _operateString;
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private static int _operateIndex = 0;
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/// <summary>
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/// 设置要处理的字符串
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/// </summary>
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public static void SetOperateString(string content)
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{
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_operateString = content;
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_operateIndex = 0;
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}
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public static bool NextFloat(char separator, out float value)
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{
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value = 0;
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#if MOTION_SERVER
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ReadOnlySpan<char> span = MoveNext(separator);
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#else
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string span = MoveNext(separator);
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#endif
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if (span == null)
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{
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return false;
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}
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else
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{
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value = Single.Parse(span);
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return true;
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}
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}
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public static bool NextDouble(char separator, out double value)
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{
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value = 0;
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#if MOTION_SERVER
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ReadOnlySpan<char> span = MoveNext(separator);
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#else
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string span = MoveNext(separator);
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#endif
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if (span == null)
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{
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return false;
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}
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else
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{
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value = Double.Parse(span);
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return true;
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}
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}
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public static bool NextInt(char separator, out int value)
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{
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value = 0;
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#if MOTION_SERVER
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ReadOnlySpan<char> span = MoveNext(separator);
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#else
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string span = MoveNext(separator);
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#endif
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if (span == null)
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{
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return false;
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}
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else
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{
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value = Int32.Parse(span);
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return true;
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}
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}
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public static bool NextLong(char separator, out long value)
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{
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value = 0;
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#if MOTION_SERVER
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ReadOnlySpan<char> span = MoveNext(separator);
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#else
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string span = MoveNext(separator);
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#endif
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if (span == null)
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{
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return false;
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}
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else
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{
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value = Int64.Parse(span);
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return true;
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}
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}
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public static bool NextString(char separator, out string value)
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{
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value = null;
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#if MOTION_SERVER
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ReadOnlySpan<char> span = MoveNext(separator);
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#else
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string span = MoveNext(separator);
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#endif
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if (span == null)
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{
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return false;
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}
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else
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{
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value = span.ToString();
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return true;
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}
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}
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#if MOTION_SERVER
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private static ReadOnlySpan<char> MoveNext(char separator)
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#else
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private static string MoveNext(char separator)
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#endif
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{
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int beginIndex = _operateIndex;
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for (int i = _operateIndex; i < _operateString.Length; i++)
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{
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bool isLastChar = _operateIndex == _operateString.Length - 1;
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bool isSeparatorChar = _operateString[i] == separator;
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if (isSeparatorChar || isLastChar)
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{
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if (isLastChar && isSeparatorChar == false)
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_operateIndex++;
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int charCount = _operateIndex - beginIndex;
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if (charCount == 0)
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{
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throw new InvalidOperationException($"Invalid operate string : {_operateString}");
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}
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_operateIndex++;
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#if MOTION_SERVER
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return _operateString.AsSpan(beginIndex, charCount);
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#else
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return _operateString.Substring(beginIndex, charCount);
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#endif
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}
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else
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{
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_operateIndex++;
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}
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}
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return null; //移动失败返回NULL
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}
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}
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}
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