File size: 3,469 Bytes
8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System.Collections.ObjectModel;
namespace Microsoft.PowerShell.Commands
{
/// <summary>
/// This class is used to parse CSV text.
/// </summary>
internal sealed class CSVHelper
{
internal CSVHelper(char delimiter)
{
Delimiter = delimiter;
}
/// <summary>
/// Gets or sets the delimiter that separates the values.
/// </summary>
internal char Delimiter { get; } = ',';
/// <summary>
/// Parse a CSV string.
/// </summary>
/// <param name="csv">
/// String to be parsed.
/// </param>
internal Collection<string> ParseCsv(string csv)
{
Collection<string> result = new();
string tempString = string.Empty;
csv = csv.Trim();
if (csv.Length == 0 || csv[0] == '#')
{
return result;
}
bool inQuote = false;
for (int i = 0; i < csv.Length; i++)
{
char c = csv[i];
if (c == Delimiter)
{
if (!inQuote)
{
result.Add(tempString);
tempString = string.Empty;
}
else
{
tempString += c;
}
}
else
{
switch (c)
{
case '"':
if (inQuote)
{
// If we are at the end of the string or the end of the segment, create a new value
// Otherwise we have an error
if (i == csv.Length - 1)
{
result.Add(tempString);
tempString = string.Empty;
inQuote = false;
break;
}
if (csv[i + 1] == Delimiter)
{
result.Add(tempString);
tempString = string.Empty;
inQuote = false;
i++;
}
else if (csv[i + 1] == '"')
{
tempString += '"';
i++;
}
else
{
inQuote = false;
}
}
else
{
inQuote = true;
}
break;
default:
tempString += c;
break;
}
}
}
if (tempString.Length > 0)
{
result.Add(tempString);
}
return result;
}
}
}
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