wasSharp – Blame information for rev
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1 | zed | 1 | /////////////////////////////////////////////////////////////////////////// |
2 | // Copyright (C) Wizardry and Steamworks 2013 - License: GNU GPLv3 // |
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3 | // Please see: http://www.gnu.org/licenses/gpl.html for legal details, // |
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4 | // rights of fair usage, the disclaimer and warranty conditions. // |
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5 | /////////////////////////////////////////////////////////////////////////// |
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6 | |||
7 | using System.Collections.Generic; |
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8 | using System.Linq; |
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9 | using System.Text; |
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10 | using System.Threading.Tasks; |
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11 | |||
12 | namespace wasSharp |
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13 | { |
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14 | public class CSV |
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15 | { |
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16 | /////////////////////////////////////////////////////////////////////////// |
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17 | // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 // |
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18 | /////////////////////////////////////////////////////////////////////////// |
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19 | /// <summary> |
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20 | /// Converts a list of string to a comma-separated values string. |
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21 | /// </summary> |
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22 | /// <param name="l">a list of strings</param> |
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23 | /// <returns>a commma-separated list of values</returns> |
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24 | /// <remarks>compliant with RFC 4180</remarks> |
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25 | public static string wasEnumerableToCSV(IEnumerable<string> l) |
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26 | { |
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27 | string[] csv = l.Select(o => o).ToArray(); |
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4 | zed | 28 | char[] escapeCharacters = {'"', ' ', ',', '\r', '\n'}; |
1 | zed | 29 | Parallel.ForEach(csv.Select((v, i) => new {i, v}), o => |
30 | { |
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31 | string cell = o.v.Replace("\"", "\"\""); |
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32 | |||
4 | zed | 33 | switch (cell.IndexOfAny(escapeCharacters)) |
1 | zed | 34 | { |
35 | case -1: |
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36 | csv[o.i] = cell; |
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37 | break; |
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38 | default: |
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39 | csv[o.i] = "\"" + cell + "\""; |
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40 | break; |
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41 | } |
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42 | }); |
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43 | return string.Join(",", csv); |
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44 | } |
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45 | |||
46 | /////////////////////////////////////////////////////////////////////////// |
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47 | // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 // |
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48 | /////////////////////////////////////////////////////////////////////////// |
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49 | /// <summary> |
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50 | /// Converts a comma-separated list of values to a list of strings. |
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51 | /// </summary> |
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52 | /// <param name="csv">a comma-separated list of values</param> |
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53 | /// <returns>a list of strings</returns> |
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54 | /// <remarks>compliant with RFC 4180</remarks> |
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55 | public static IEnumerable<string> wasCSVToEnumerable(string csv) |
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56 | { |
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57 | Stack<char> s = new Stack<char>(); |
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58 | StringBuilder m = new StringBuilder(); |
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59 | for (int i = 0; i < csv.Length; ++i) |
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60 | { |
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61 | switch (csv[i]) |
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62 | { |
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63 | case ',': |
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64 | if (!s.Any() || !s.Peek().Equals('"')) |
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65 | { |
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66 | yield return m.ToString(); |
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67 | m = new StringBuilder(); |
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68 | continue; |
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69 | } |
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70 | m.Append(csv[i]); |
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71 | continue; |
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72 | case '"': |
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73 | if (i + 1 < csv.Length && csv[i].Equals(csv[i + 1])) |
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74 | { |
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75 | m.Append(csv[i]); |
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76 | ++i; |
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77 | continue; |
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78 | } |
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79 | if (!s.Any() || !s.Peek().Equals(csv[i])) |
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80 | { |
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81 | s.Push(csv[i]); |
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82 | continue; |
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83 | } |
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84 | s.Pop(); |
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85 | continue; |
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86 | } |
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87 | m.Append(csv[i]); |
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88 | } |
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89 | |||
90 | yield return m.ToString(); |
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91 | } |
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92 | } |
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93 | } |