git.maemo.org Git - physicsfs/blob - lzma/CS/7zip/Common/CommandLineParser.cs

   1 // CommandLineParser.cs
   2
   3 using System;
   4 using System.Collections;
   5
   6 namespace SevenZip.CommandLineParser
   7 {
   8         public enum SwitchType
   9         {
  10                 Simple,
  11                 PostMinus,
  12                 LimitedPostString,
  13                 UnLimitedPostString,
  14                 PostChar
  15         }
  16
  17         public class SwitchForm
  18         {
  19                 public string IDString;
  20                 public SwitchType Type;
  21                 public bool Multi;
  22                 public int MinLen;
  23                 public int MaxLen;
  24                 public string PostCharSet;
  25
  26                 public SwitchForm(string idString, SwitchType type, bool multi,
  27                         int minLen, int maxLen, string postCharSet)
  28                 {
  29                         IDString = idString;
  30                         Type = type;
  31                         Multi = multi;
  32                         MinLen = minLen;
  33                         MaxLen = maxLen;
  34                         PostCharSet = postCharSet;
  35                 }
  36                 public SwitchForm(string idString, SwitchType type, bool multi, int minLen):
  37                         this(idString, type, multi, minLen, 0, "")
  38                 {
  39                 }
  40                 public SwitchForm(string idString, SwitchType type, bool multi):
  41                         this(idString, type, multi, 0)
  42                 {
  43                 }
  44         }
  45
  46         public class SwitchResult
  47         {
  48                 public bool ThereIs;
  49                 public bool WithMinus;
  50                 public ArrayList PostStrings = new ArrayList();
  51                 public int PostCharIndex;
  52                 public SwitchResult()
  53                 {
  54                         ThereIs = false;
  55                 }
  56         }
  57
  58         public class Parser
  59         {
  60                 public ArrayList NonSwitchStrings = new ArrayList();
  61                 SwitchResult[] _switches;
  62
  63                 public Parser(int numSwitches)
  64                 {
  65                         _switches = new SwitchResult[numSwitches];
  66                         for (int i = 0; i < numSwitches; i++)
  67                                 _switches[i] = new SwitchResult();
  68                 }
  69
  70                 bool ParseString(string srcString, SwitchForm[] switchForms)
  71                 {
  72                         int len = srcString.Length;
  73                         if (len == 0)
  74                                 return false;
  75                         int pos = 0;
  76                         if (!IsItSwitchChar(srcString[pos]))
  77                                 return false;
  78                         while (pos < len)
  79                         {
  80                                 if (IsItSwitchChar(srcString[pos]))
  81                                         pos++;
  82                                 const int kNoLen = -1;
  83                                 int matchedSwitchIndex = 0;
  84                                 int maxLen = kNoLen;
  85                                 for (int switchIndex = 0; switchIndex < _switches.Length; switchIndex++)
  86                                 {
  87                                         int switchLen = switchForms[switchIndex].IDString.Length;
  88                                         if (switchLen <= maxLen || pos + switchLen > len)
  89                                                 continue;
  90                                         if (String.Compare(switchForms[switchIndex].IDString, 0,
  91                                                         srcString, pos, switchLen, true) == 0)
  92                                         {
  93                                                 matchedSwitchIndex = switchIndex;
  94                                                 maxLen = switchLen;
  95                                         }
  96                                 }
  97                                 if (maxLen == kNoLen)
  98                                         throw new Exception("maxLen == kNoLen");
  99                                 SwitchResult matchedSwitch = _switches[matchedSwitchIndex];
 100                                 SwitchForm switchForm = switchForms[matchedSwitchIndex];
 101                                 if ((!switchForm.Multi) && matchedSwitch.ThereIs)
 102                                         throw new Exception("switch must be single");
 103                                 matchedSwitch.ThereIs = true;
 104                                 pos += maxLen;
 105                                 int tailSize = len - pos;
 106                                 SwitchType type = switchForm.Type;
 107                                 switch (type)
 108                                 {
 109                                         case SwitchType.PostMinus:
 110                                                 {
 111                                                         if (tailSize == 0)
 112                                                                 matchedSwitch.WithMinus = false;
 113                                                         else
 114                                                         {
 115                                                                 matchedSwitch.WithMinus = (srcString[pos] == kSwitchMinus);
 116                                                                 if (matchedSwitch.WithMinus)
 117                                                                         pos++;
 118                                                         }
 119                                                         break;
 120                                                 }
 121                                         case SwitchType.PostChar:
 122                                                 {
 123                                                         if (tailSize < switchForm.MinLen)
 124                                                                 throw new Exception("switch is not full");
 125                                                         string charSet = switchForm.PostCharSet;
 126                                                         const int kEmptyCharValue = -1;
 127                                                         if (tailSize == 0)
 128                                                                 matchedSwitch.PostCharIndex = kEmptyCharValue;
 129                                                         else
 130                                                         {
 131                                                                 int index = charSet.IndexOf(srcString[pos]);
 132                                                                 if (index < 0)
 133                                                                         matchedSwitch.PostCharIndex = kEmptyCharValue;
 134                                                                 else
 135                                                                 {
 136                                                                         matchedSwitch.PostCharIndex = index;
 137                                                                         pos++;
 138                                                                 }
 139                                                         }
 140                                                         break;
 141                                                 }
 142                                         case SwitchType.LimitedPostString:
 143                                         case SwitchType.UnLimitedPostString:
 144                                                 {
 145                                                         int minLen = switchForm.MinLen;
 146                                                         if (tailSize < minLen)
 147                                                                 throw new Exception("switch is not full");
 148                                                         if (type == SwitchType.UnLimitedPostString)
 149                                                         {
 150                                                                 matchedSwitch.PostStrings.Add(srcString.Substring(pos));
 151                                                                 return true;
 152                                                         }
 153                                                         String stringSwitch = srcString.Substring(pos, minLen);
 154                                                         pos += minLen;
 155                                                         for (int i = minLen; i < switchForm.MaxLen && pos < len; i++, pos++)
 156                                                         {
 157                                                                 char c = srcString[pos];
 158                                                                 if (IsItSwitchChar(c))
 159                                                                         break;
 160                                                                 stringSwitch += c;
 161                                                         }
 162                                                         matchedSwitch.PostStrings.Add(stringSwitch);
 163                                                         break;
 164                                                 }
 165                                 }
 166                         }
 167                         return true;
 168
 169                 }
 170
 171                 public void ParseStrings(SwitchForm[] switchForms, string[] commandStrings)
 172                 {
 173                         int numCommandStrings = commandStrings.Length;
 174                         bool stopSwitch = false;
 175                         for (int i = 0; i < numCommandStrings; i++)
 176                         {
 177                                 string s = commandStrings[i];
 178                                 if (stopSwitch)
 179                                         NonSwitchStrings.Add(s);
 180                                 else
 181                                         if (s == kStopSwitchParsing)
 182                                         stopSwitch = true;
 183                                 else
 184                                         if (!ParseString(s, switchForms))
 185                                         NonSwitchStrings.Add(s);
 186                         }
 187                 }
 188
 189                 public SwitchResult this[int index] { get { return _switches[index]; } }
 190
 191                 public static int ParseCommand(CommandForm[] commandForms, string commandString,
 192                         out string postString)
 193                 {
 194                         for (int i = 0; i < commandForms.Length; i++)
 195                         {
 196                                 string id = commandForms[i].IDString;
 197                                 if (commandForms[i].PostStringMode)
 198                                 {
 199                                         if (commandString.IndexOf(id) == 0)
 200                                         {
 201                                                 postString = commandString.Substring(id.Length);
 202                                                 return i;
 203                                         }
 204                                 }
 205                                 else
 206                                         if (commandString == id)
 207                                 {
 208                                         postString = "";
 209                                         return i;
 210                                 }
 211                         }
 212                         postString = "";
 213                         return -1;
 214                 }
 215
 216                 static bool ParseSubCharsCommand(int numForms, CommandSubCharsSet[] forms,
 217                         string commandString, ArrayList indices)
 218                 {
 219                         indices.Clear();
 220                         int numUsedChars = 0;
 221                         for (int i = 0; i < numForms; i++)
 222                         {
 223                                 CommandSubCharsSet charsSet = forms[i];
 224                                 int currentIndex = -1;
 225                                 int len = charsSet.Chars.Length;
 226                                 for (int j = 0; j < len; j++)
 227                                 {
 228                                         char c = charsSet.Chars[j];
 229                                         int newIndex = commandString.IndexOf(c);
 230                                         if (newIndex >= 0)
 231                                         {
 232                                                 if (currentIndex >= 0)
 233                                                         return false;
 234                                                 if (commandString.IndexOf(c, newIndex + 1) >= 0)
 235                                                         return false;
 236                                                 currentIndex = j;
 237                                                 numUsedChars++;
 238                                         }
 239                                 }
 240                                 if (currentIndex == -1 && !charsSet.EmptyAllowed)
 241                                         return false;
 242                                 indices.Add(currentIndex);
 243                         }
 244                         return (numUsedChars == commandString.Length);
 245                 }
 246                 const char kSwitchID1 = '-';
 247                 const char kSwitchID2 = '/';
 248
 249                 const char kSwitchMinus = '-';
 250                 const string kStopSwitchParsing = "--";
 251
 252                 static bool IsItSwitchChar(char c)
 253                 {
 254                         return (c == kSwitchID1 || c == kSwitchID2);
 255                 }
 256         }
 257
 258         public class CommandForm
 259         {
 260                 public string IDString = "";
 261                 public bool PostStringMode = false;
 262                 public CommandForm(string idString, bool postStringMode)
 263                 {
 264                         IDString = idString;
 265                         PostStringMode = postStringMode;
 266                 }
 267         }
 268
 269         class CommandSubCharsSet
 270         {
 271                 public string Chars = "";
 272                 public bool EmptyAllowed = false;
 273         }
 274 }