91 lines
2.9 KiB
C#
91 lines
2.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace FSI.Lib.WinSettings
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{
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internal static class ArrayToString
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{
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/// <summary>
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/// Represents the given array as a single string.
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/// </summary>
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/// <param name="array">String array to encode.</param>
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/// <returns>The encoded string.</returns>
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public static string Encode(string[] array)
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{
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StringBuilder builder = new StringBuilder();
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if (array == null)
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return string.Empty;
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for (int i = 0; i < array.Length; i++)
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{
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if (i > 0)
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builder.Append(',');
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if (array[i].IndexOfAny(new[] { ',', '"', '\r', '\n' }) >= 0)
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builder.Append(string.Format("\"{0}\"", array[i].Replace("\"", "\"\"")));
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else
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builder.Append(array[i]);
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}
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return builder.ToString();
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}
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/// <summary>
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/// Decodes a string created with <see cref="Encode"></see> back to an array.
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/// </summary>
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/// <param name="s">String to decode.</param>
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/// <returns>The decoded array.</returns>
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public static string[] Decode(string s)
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{
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List<string> list = new List<string>();
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int pos = 0;
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if (s == null)
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return Array.Empty<string>();
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while (pos < s.Length)
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{
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if (s[pos] == '\"')
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{
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// Parse quoted value
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StringBuilder builder = new StringBuilder();
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// Skip starting quote
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pos++;
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while (pos < s.Length)
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{
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if (s[pos] == '"')
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{
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// Skip quote
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pos++;
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// One quote signifies end of value
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// Two quote signifies single quote literal
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if (pos >= s.Length || s[pos] != '"')
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break;
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}
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builder.Append(s[pos++]);
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}
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list.Add(builder.ToString());
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// Skip delimiter
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pos = s.IndexOf(',', pos);
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if (pos == -1)
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pos = s.Length;
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pos++;
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}
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else
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{
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// Parse value
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int start = pos;
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pos = s.IndexOf(',', pos);
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if (pos == -1)
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pos = s.Length;
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list.Add(s.Substring(start, pos - start));
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// Skip delimiter
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pos++;
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}
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}
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return list.ToArray();
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}
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}
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}
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