42 lines
1.3 KiB
C#
42 lines
1.3 KiB
C#
using System;
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using System.Text;
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using System.Collections.Generic;
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public class TokenizeAStringWithEscaping
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{
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public static void Main() {
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string testcase = "one^|uno||three^^^^|four^^^|^cuatro|";
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foreach (var token in testcase.Tokenize(separator: '|', escape: '^')) {
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Console.WriteLine(": " + token); //Adding a : so we can see empty lines
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}
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}
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}
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public static class Extensions
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{
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public static IEnumerable<string> Tokenize(this string input, char separator, char escape) {
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if (input == null) yield break;
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var buffer = new StringBuilder();
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bool escaping = false;
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foreach (char c in input) {
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if (escaping) {
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buffer.Append(c);
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escaping = false;
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} else if (c == escape) {
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escaping = true;
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} else if (c == separator) {
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yield return buffer.Flush();
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} else {
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buffer.Append(c);
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}
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}
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if (buffer.Length > 0 || input[input.Length-1] == separator) yield return buffer.Flush();
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}
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public static string Flush(this StringBuilder stringBuilder) {
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string result = stringBuilder.ToString();
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stringBuilder.Clear();
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return result;
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}
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}
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