wvdotnet/wvini.cs

   1 /*
   2  * Versaplex:
   3  *   Copyright (C)2007-2008 Versabanq Innovations Inc. and contributors.
   4  *       See the included file named LICENSE for license information.
   5  */
   6 using System;
   7 using System.IO;
   8 using System.Collections.Generic;
   9
  10 namespace Wv
  11 {
  12     /// Well, it's not exactly UniConf, but...
  13     public class WvIni
  14     {
  15         string filename;
  16         Dictionary<string,IDictionary<string,string>> sections
  17             = new Dictionary<string,IDictionary<string,string>>
  18                     (StringComparer.OrdinalIgnoreCase);
  19
  20         public WvIni(string filename)
  21         {
  22             this.filename = filename;
  23
  24             StreamReader r;
  25             try
  26             {
  27                 r = File.OpenText(filename);
  28             }
  29             catch (IOException)
  30             {
  31                 return; // I guess there's no file!
  32             }
  33
  34             using (r)
  35             {
  36                 string section = "";
  37                 string s;
  38                 while ((s = r.ReadLine()) != null)
  39                 {
  40                     s = s.Trim();
  41                     if (s.Length == 0) continue; // blank line
  42                     if (s[0] == '#') continue; // comment
  43                     if (s[0] == '[' && s[s.Length-1]==']') // section
  44                     {
  45                         section = s.Substring(1, s.Length-2);
  46                     }
  47                     else if (s.IndexOf('=') >= 0)
  48                     {
  49                         string[] a = s.Split(new char[] {'='}, 2);
  50                         this[section][a[0].Trim()] = a[1].Trim();
  51                     }
  52                     else
  53                         continue; // whatever
  54                 }
  55             }
  56         }
  57
  58         public IDictionary<string,string> this[string sectname]
  59         {
  60             get
  61             {
  62                 if (!sections.ContainsKey(sectname))
  63                     sections.Add(sectname, new Dictionary<string,string>
  64                                      (StringComparer.OrdinalIgnoreCase));
  65                 return sections[sectname];
  66             }
  67         }
  68
  69         public string get(string section, string key, string defval)
  70         {
  71             string v;
  72             if (!this[section].TryGetValue(key, out v))
  73                 return defval;
  74             return v;
  75         }
  76
  77         public string get(string section, string key)
  78         {
  79             return get(section, key, null);
  80         }
  81
  82         public void set(string section, string key, string val)
  83         {
  84             this[section][key] = val;
  85         }
  86
  87         public void maybeset(string section, string key, string val)
  88         {
  89             if (get(section, key) == null)
  90                 set(section, key, val);
  91         }
  92
  93         public void save(string filename)
  94         {
  95             using (StreamWriter w = File.CreateText(filename))
  96             {
  97                 foreach (string section in sections.Keys)
  98                 {
  99                     w.Write(wv.fmt("\n[{0}]\n", section));
 100                     foreach (string ent in sections[section].Keys)
 101                         w.Write(wv.fmt("{0} = {1}\n",
 102                                        ent, sections[section][ent]));
 103                 }
 104             }
 105         }
 106
 107         public void save()
 108         {
 109             save(filename);
 110         }
 111     }
 112 }