wasSharp – Rev 27
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///////////////////////////////////////////////////////////////////////////
// Copyright (C) Wizardry and Steamworks 2013 - License: GNU GPLv3 //
// Please see: http://www.gnu.org/licenses/gpl.html for legal details, //
// rights of fair usage, the disclaimer and warranty conditions. //
///////////////////////////////////////////////////////////////////////////
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace wasSharp
{
public static class CSV
{
///////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
///////////////////////////////////////////////////////////////////////////
/// <summary>
/// Converts a list of strings to a comma-separated values string.
/// </summary>
/// <returns>a commma-separated list of values</returns>
/// <remarks>compliant with RFC 4180</remarks>
public static string FromEnumerable(IEnumerable<string> input)
{
return string.Join(",",
input
.Select(o => o.Replace("\"", "\"\""))
.Select(o => o.IndexOfAny(new[] { '"', ' ', ',', '\r', '\n' }).Equals(-1) ? o : "\"" + o + "\""));
}
///////////////////////////////////////////////////////////////////////////
// Copyright (C) 2016 Wizardry and Steamworks - License: GNU GPLv3 //
///////////////////////////////////////////////////////////////////////////
/// <summary>
/// Converts a dictionary of strings to a comma-separated values string.
/// </summary>
/// <returns>a commma-separated list of values</returns>
/// <remarks>compliant with RFC 4180</remarks>
public static string FromDictionary<K, V>(Dictionary<K, V> input)
{
return string.Join(",", input.Keys.Select(o => o.ToString()).Zip(input.Values.Select(o => o.ToString()),
(o, p) =>
string.Join(",",
o.Replace("\"", "\"\"").IndexOfAny(new[] { '"', ' ', ',', '\r', '\n' }).Equals(-1)
? o
: "\"" + o + "\"",
p.Replace("\"", "\"\"").IndexOfAny(new[] { '"', ' ', ',', '\r', '\n' }).Equals(-1)
? p
: "\"" + p + "\"")));
}
///////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
///////////////////////////////////////////////////////////////////////////
/// <summary>
/// Converts successive comma-separated values to key-value pairs.
/// </summary>
/// <returns>key-value pairs of successive comma-separate values</returns>
public static IEnumerable<KeyValuePair<string, string>> ToKeyValue(string input)
{
return ToEnumerable(input).AsParallel().Select((o, p) => new { o, p })
.GroupBy(q => q.p / 2, q => q.o)
.Select(o => o.ToArray())
.TakeWhile(o => o.Length % 2 == 0)
.Where(o => !string.IsNullOrEmpty(o[0]) || !string.IsNullOrEmpty(o[1]))
.ToDictionary(o => o[0], p => p[1]).Select(o => o);
}
///////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
///////////////////////////////////////////////////////////////////////////
/// <summary>
/// Converts a generic key value pair to a CSV.
/// </summary>
/// <returns>a commma-separated list of values</returns>
/// <remarks>compliant with RFC 4180</remarks>
public static string FromKeyValue<K, V>(KeyValuePair<K, V> input)
{
var key = input.Key.ToString();
var value = input.Value.ToString();
return string.Join(",", key
.Replace("\"", "\"\"").IndexOfAny(new[] { '"', ' ', ',', '\r', '\n' }).Equals(-1)
? key
: "\"" + key + "\"", value
.Replace("\"", "\"\"")
.IndexOfAny(new[] { '"', ' ', ',', '\r', '\n' })
.Equals(-1)
? value
: "\"" + value + "\"");
}
///////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
///////////////////////////////////////////////////////////////////////////
/// <summary>
/// Converts a comma-separated list of values to a list of strings.
/// </summary>
/// <param name="csv">a comma-separated list of values</param>
/// <returns>a list of strings</returns>
/// <remarks>compliant with RFC 4180</remarks>
public static IEnumerable<string> ToEnumerable(string csv)
{
var s = new Stack<char>();
var m = new StringBuilder();
for (var i = 0; i < csv.Length; ++i)
{
switch (csv[i])
{
case ',':
if (!s.Any() || !s.Peek().Equals('"'))
{
yield return m.ToString();
m = new StringBuilder();
continue;
}
m.Append(csv[i]);
continue;
case '"':
if (i + 1 < csv.Length && csv[i].Equals(csv[i + 1]))
{
m.Append(csv[i]);
++i;
continue;
}
if (!s.Any() || !s.Peek().Equals(csv[i]))
{
s.Push(csv[i]);
continue;
}
s.Pop();
continue;
}
m.Append(csv[i]);
}
yield return m.ToString();
}
}
}