mcs/class/referencesource/System.Data.SqlXml/System/Xml/Xsl/XsltOld/NumberAction.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="NumberAction.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">Microsoft</owner>
   6 //------------------------------------------------------------------------------
   7
   8 namespace System.Xml.Xsl.XsltOld {
   9     using Res = System.Xml.Utils.Res;
  10     using System.Diagnostics;
  11     using System.Text;
  12     using System.Globalization;
  13     using System.Collections;
  14     using System.Collections.Generic;
  15     using System.Xml.XPath;
  16     using System.Xml.Xsl.Runtime;
  17
  18     internal class NumberAction : ContainerAction {
  19         const long msofnfcNil  =            0x00000000;     // no flags
  20         const long msofnfcTraditional =     0x00000001;     // use traditional numbering
  21         const long msofnfcAlwaysFormat =    0x00000002;     // if requested format is not supported, use Arabic (Western) style
  22
  23         const int cchMaxFormat        = 63 ;     // max size of formatted result
  24         const int cchMaxFormatDecimal = 11  ;    // max size of formatted decimal result (doesn't handle the case of a very large pwszSeparator or minlen)
  25
  26         internal class FormatInfo {
  27             public bool               isSeparator;      // False for alphanumeric strings of chars
  28             public NumberingSequence  numSequence;      // Specifies numbering sequence
  29             public int                length;           // Minimum length of decimal numbers (if necessary, pad to left with zeros)
  30             public string             formatString;     // Format string for separator token
  31
  32             public FormatInfo(bool isSeparator, string formatString) {
  33                 this.isSeparator  = isSeparator;
  34                 this.formatString = formatString;
  35             }
  36
  37             public FormatInfo() {}
  38         }
  39
  40         static FormatInfo DefaultFormat    = new FormatInfo(false, "0");
  41         static FormatInfo DefaultSeparator = new FormatInfo(true , ".");
  42
  43         class NumberingFormat : NumberFormatterBase {
  44             NumberingSequence seq;
  45             int     cMinLen;
  46             string  separator;
  47             int     sizeGroup;
  48
  49             internal NumberingFormat() {}
  50
  51             internal void setNumberingType(NumberingSequence seq) { this.seq = seq; }
  52             //void setLangID(LID langid) {_langid = langid;}
  53             //internal void setTraditional(bool fTraditional) {_grfnfc = fTraditional ? msofnfcTraditional : 0;}
  54             internal void setMinLen(int cMinLen) { this.cMinLen = cMinLen; }
  55             internal void setGroupingSeparator(string separator) { this.separator = separator; }
  56
  57             internal void setGroupingSize(int sizeGroup) {
  58                 if (0 <= sizeGroup && sizeGroup <= 9) {
  59                     this.sizeGroup = sizeGroup;
  60                 }
  61             }
  62
  63             internal String FormatItem(object value) {
  64                 double dblVal;
  65
  66                 if (value is int) {
  67                     dblVal = (int)value;
  68                 } else {
  69                     dblVal = XmlConvert.ToXPathDouble(value);
  70
  71                     if (0.5 <= dblVal && !double.IsPositiveInfinity(dblVal)) {
  72                         dblVal = XmlConvert.XPathRound(dblVal);
  73                     } else {
  74                         // It is an error if the number is NaN, infinite or less than 0.5; an XSLT processor may signal the error;
  75                         // if it does not signal the error, it must recover by converting the number to a string as if by a call
  76                         // to the string function and inserting the resulting string into the result tree.
  77                         return XmlConvert.ToXPathString(value);
  78                     }
  79                 }
  80
  81                 Debug.Assert(dblVal >= 1);
  82
  83                 switch (seq) {
  84                 case NumberingSequence.Arabic :
  85                     break;
  86                 case NumberingSequence.UCLetter :
  87                 case NumberingSequence.LCLetter :
  88                     if (dblVal <= MaxAlphabeticValue) {
  89                         StringBuilder sb = new StringBuilder();
  90                         ConvertToAlphabetic(sb, dblVal, seq == NumberingSequence.UCLetter ? 'A' : 'a', 26);
  91                         return sb.ToString();
  92                     }
  93                     break;
  94                 case NumberingSequence.UCRoman :
  95                 case NumberingSequence.LCRoman:
  96                     if (dblVal <= MaxRomanValue) {
  97                         StringBuilder sb = new StringBuilder();
  98                         ConvertToRoman(sb, dblVal, seq == NumberingSequence.UCRoman);
  99                         return sb.ToString();
 100                     }
 101                     break;
 102                 }
 103
 104                 return ConvertToArabic(dblVal, cMinLen, sizeGroup, separator);
 105             }
 106
 107             static string ConvertToArabic(double val, int minLength, int groupSize, string groupSeparator) {
 108                 String str;
 109
 110                 if (groupSize != 0 && groupSeparator != null ) {
 111                     NumberFormatInfo NumberFormat = new NumberFormatInfo();
 112                     NumberFormat.NumberGroupSizes = new int[] { groupSize };
 113                     NumberFormat.NumberGroupSeparator = groupSeparator;
 114                     if (Math.Floor(val) == val) {
 115                         NumberFormat.NumberDecimalDigits = 0;
 116                     }
 117                     str = val.ToString("N", NumberFormat);
 118                 }
 119                 else {
 120                     str = Convert.ToString(val, CultureInfo.InvariantCulture);
 121                 }
 122
 123                 if (str.Length >= minLength) {
 124                     return str;
 125                 } else {
 126                     StringBuilder sb = new StringBuilder(minLength);
 127                     sb.Append('0', minLength - str.Length);
 128                     sb.Append(str);
 129                     return sb.ToString();
 130                 }
 131             }
 132         }
 133
 134     // States:
 135         private const int OutputNumber = 2;
 136
 137         private String    level;
 138         private String    countPattern;
 139         private int       countKey = Compiler.InvalidQueryKey;
 140         private String    from;
 141         private int       fromKey = Compiler.InvalidQueryKey;
 142         private String    value;
 143         private int       valueKey = Compiler.InvalidQueryKey;
 144         private Avt       formatAvt;
 145         private Avt       langAvt;
 146         private Avt       letterAvt;
 147         private Avt       groupingSepAvt;
 148         private Avt       groupingSizeAvt;
 149         // Compile time precalculated AVTs
 150         private List<FormatInfo> formatTokens;
 151         private String    lang;
 152         private String    letter;
 153         private String    groupingSep;
 154         private String    groupingSize;
 155         private bool      forwardCompatibility;
 156
 157         internal override bool CompileAttribute(Compiler compiler) {
 158             string name   = compiler.Input.LocalName;
 159             string value  = compiler.Input.Value;
 160             if (Ref.Equal(name, compiler.Atoms.Level)) {
 161                 if (value != "any" && value != "multiple" && value != "single") {
 162                     throw XsltException.Create(Res.Xslt_InvalidAttrValue, "level", value);
 163                 }
 164                 this.level = value;
 165             }
 166             else if (Ref.Equal(name, compiler.Atoms.Count)) {
 167                 this.countPattern = value;
 168                 this.countKey = compiler.AddQuery(value, /*allowVars:*/true, /*allowKey:*/true, /*pattern*/true);
 169             }
 170             else if (Ref.Equal(name, compiler.Atoms.From)) {
 171                 this.from = value;
 172                 this.fromKey = compiler.AddQuery(value, /*allowVars:*/true, /*allowKey:*/true, /*pattern*/true);
 173             }
 174             else if (Ref.Equal(name, compiler.Atoms.Value)) {
 175                 this.value = value;
 176                 this.valueKey = compiler.AddQuery(value);
 177             }
 178             else if (Ref.Equal(name, compiler.Atoms.Format)) {
 179                 this.formatAvt = Avt.CompileAvt(compiler, value);
 180             }
 181             else if (Ref.Equal(name, compiler.Atoms.Lang)) {
 182                 this.langAvt = Avt.CompileAvt(compiler, value);
 183             }
 184             else if (Ref.Equal(name, compiler.Atoms.LetterValue)) {
 185                 this.letterAvt = Avt.CompileAvt(compiler, value);
 186             }
 187             else if (Ref.Equal(name, compiler.Atoms.GroupingSeparator)) {
 188                 this.groupingSepAvt = Avt.CompileAvt(compiler, value);
 189             }
 190             else if (Ref.Equal(name, compiler.Atoms.GroupingSize)) {
 191                 this.groupingSizeAvt = Avt.CompileAvt(compiler, value);
 192             }
 193             else {
 194                return false;
 195             }
 196             return true;
 197         }
 198
 199         internal override void Compile(Compiler compiler) {
 200             CompileAttributes(compiler);
 201             CheckEmpty(compiler);
 202
 203             this.forwardCompatibility = compiler.ForwardCompatibility;
 204             this.formatTokens  = ParseFormat(PrecalculateAvt(ref this.formatAvt));
 205             this.letter        = ParseLetter(PrecalculateAvt(ref this.letterAvt));
 206             this.lang          = PrecalculateAvt(ref this.langAvt);
 207             this.groupingSep   = PrecalculateAvt(ref this.groupingSepAvt);
 208             if (this.groupingSep != null && this.groupingSep.Length > 1) {
 209                 throw XsltException.Create(Res.Xslt_CharAttribute, "grouping-separator");
 210             }
 211             this.groupingSize  = PrecalculateAvt(ref this.groupingSizeAvt);
 212         }
 213
 214         private int numberAny(Processor processor, ActionFrame frame) {
 215             int result = 0;
 216             // Our current point will be our end point in this search
 217             XPathNavigator endNode = frame.Node;
 218             if(endNode.NodeType == XPathNodeType.Attribute || endNode.NodeType == XPathNodeType.Namespace) {
 219                 endNode = endNode.Clone();
 220                 endNode.MoveToParent();
 221             }
 222             XPathNavigator startNode = endNode.Clone();
 223
 224             if(this.fromKey != Compiler.InvalidQueryKey) {
 225                 bool hitFrom = false;
 226                 // First try to find start by traversing up. This gives the best candidate or we hit root
 227                 do{
 228                     if(processor.Matches(startNode, this.fromKey)) {
 229                         hitFrom = true;
 230                         break;
 231                     }
 232                 }while(startNode.MoveToParent());
 233
 234                 Debug.Assert(
 235                     processor.Matches(startNode, this.fromKey) ||   // we hit 'from' or
 236                     startNode.NodeType == XPathNodeType.Root        // we are at root
 237                 );
 238
 239                 // from this point (matched parent | root) create descendent quiery:
 240                 // we have to reset 'result' on each 'from' node, because this point can' be not last from point;
 241                 XPathNodeIterator  sel = startNode.SelectDescendants(XPathNodeType.All, /*matchSelf:*/ true);
 242                 while (sel.MoveNext()) {
 243                     if(processor.Matches(sel.Current, this.fromKey)) {
 244                         hitFrom = true;
 245                         result = 0;
 246                     }
 247                     else if(MatchCountKey(processor, frame.Node, sel.Current)) {
 248                         result ++;
 249                     }
 250                     if(sel.Current.IsSamePosition(endNode)) {
 251                         break;
 252                     }
 253                 }
 254                 if(! hitFrom) {
 255                     result = 0;
 256                 }
 257             }
 258             else {
 259                 // without 'from' we startting from the root
 260                 startNode.MoveToRoot();
 261                 XPathNodeIterator  sel = startNode.SelectDescendants(XPathNodeType.All, /*matchSelf:*/ true);
 262                 // and count root node by itself
 263                 while (sel.MoveNext()) {
 264                     if (MatchCountKey(processor, frame.Node, sel.Current)) {
 265                         result ++;
 266                     }
 267                     if (sel.Current.IsSamePosition(endNode)) {
 268                         break;
 269                     }
 270                 }
 271             }
 272             return result;
 273         }
 274
 275         // check 'from' condition:
 276         // if 'from' exist it has to be ancestor-or-self for the nav
 277         private bool checkFrom(Processor processor, XPathNavigator nav) {
 278             if(this.fromKey == Compiler.InvalidQueryKey) {
 279                 return true;
 280             }
 281             do {
 282                 if (processor.Matches(nav, this.fromKey)) {
 283                     return true;
 284                 }
 285             }while (nav.MoveToParent());
 286             return false;
 287         }
 288
 289         private bool moveToCount(XPathNavigator nav, Processor processor, XPathNavigator contextNode) {
 290             do {
 291                 if (this.fromKey != Compiler.InvalidQueryKey && processor.Matches(nav, this.fromKey)) {
 292                     return false;
 293                 }
 294                 if (MatchCountKey(processor, contextNode, nav)) {
 295                     return true;
 296                 }
 297             }while (nav.MoveToParent());
 298             return false;
 299         }
 300
 301         private int numberCount(XPathNavigator nav, Processor processor, XPathNavigator contextNode) {
 302             Debug.Assert(nav.NodeType != XPathNodeType.Attribute && nav.NodeType != XPathNodeType.Namespace);
 303             Debug.Assert(MatchCountKey(processor, contextNode, nav));
 304             XPathNavigator runner = nav.Clone();
 305             int number = 1;
 306             if (runner.MoveToParent()) {
 307                 runner.MoveToFirstChild();
 308                 while (! runner.IsSamePosition(nav)) {
 309                     if (MatchCountKey(processor, contextNode, runner)) {
 310                         number++;
 311                     }
 312                     if (! runner.MoveToNext()) {
 313                         Debug.Fail("We implementing preceding-sibling::node() and some how miss context node 'nav'");
 314                         break;
 315                     }
 316                 }
 317             }
 318             return number;
 319         }
 320
 321         private static object SimplifyValue(object value) {
 322             // If result of xsl:number is not in correct range it should be returned as is.
 323             // so we need intermidiate string value.
 324             // If it's already a double we would like to keep it as double.
 325             // So this function converts to string only if if result is nodeset or RTF
 326             Debug.Assert(!(value is int));
 327             if (Type.GetTypeCode(value.GetType()) == TypeCode.Object) {
 328                 XPathNodeIterator nodeset = value as XPathNodeIterator;
 329                 if (nodeset != null) {
 330                     if (nodeset.MoveNext()) {
 331                         return nodeset.Current.Value;
 332                     }
 333                     return string.Empty;
 334                 }
 335                 XPathNavigator nav = value as XPathNavigator;
 336                 if (nav != null) {
 337                     return nav.Value;
 338                 }
 339             }
 340             return value;
 341         }
 342
 343         internal override void Execute(Processor processor, ActionFrame frame) {
 344             Debug.Assert(processor != null && frame != null);
 345             ArrayList list = processor.NumberList;
 346             switch (frame.State) {
 347             case Initialized:
 348                 Debug.Assert(frame != null);
 349                 Debug.Assert(frame.NodeSet != null);
 350                 list.Clear();
 351                 if (this.valueKey != Compiler.InvalidQueryKey) {
 352                     list.Add(SimplifyValue(processor.Evaluate(frame, this.valueKey)));
 353                 }
 354                 else if (this.level == "any") {
 355                     int number = numberAny(processor, frame);
 356                     if (number != 0) {
 357                         list.Add(number);
 358                     }
 359                 }
 360                 else {
 361                     bool multiple = (this.level == "multiple");
 362                     XPathNavigator contextNode = frame.Node;         // context of xsl:number element. We using this node in MatchCountKey()
 363                     XPathNavigator countNode   = frame.Node.Clone(); // node we count for
 364                     if (countNode.NodeType == XPathNodeType.Attribute || countNode.NodeType == XPathNodeType.Namespace) {
 365                         countNode.MoveToParent();
 366                     }
 367                     while (moveToCount(countNode, processor, contextNode)) {
 368                         list.Insert(0, numberCount(countNode, processor, contextNode));
 369                         if(! multiple || ! countNode.MoveToParent()) {
 370                             break;
 371                         }
 372                     }
 373                     if(! checkFrom(processor, countNode)) {
 374                         list.Clear();
 375                     }
 376                 }
 377
 378                 /*CalculatingFormat:*/
 379                 frame.StoredOutput = Format(list,
 380                     this.formatAvt       == null ? this.formatTokens : ParseFormat(this.formatAvt.Evaluate(processor, frame)),
 381                     this.langAvt         == null ? this.lang         : this.langAvt        .Evaluate(processor, frame),
 382                     this.letterAvt       == null ? this.letter       : ParseLetter(this.letterAvt.Evaluate(processor, frame)),
 383                     this.groupingSepAvt  == null ? this.groupingSep  : this.groupingSepAvt .Evaluate(processor, frame),
 384                     this.groupingSizeAvt == null ? this.groupingSize : this.groupingSizeAvt.Evaluate(processor, frame)
 385                 );
 386                 goto case OutputNumber;
 387             case OutputNumber :
 388                 Debug.Assert(frame.StoredOutput != null);
 389                 if (! processor.TextEvent(frame.StoredOutput)) {
 390                     frame.State        = OutputNumber;
 391                     break;
 392                 }
 393                 frame.Finished();
 394                 break;
 395             default:
 396                 Debug.Fail("Invalid Number Action execution state");
 397                 break;
 398             }
 399         }
 400
 401         private bool MatchCountKey(Processor processor, XPathNavigator contextNode, XPathNavigator nav){
 402             if (this.countKey != Compiler.InvalidQueryKey) {
 403                 return processor.Matches(nav, this.countKey);
 404             }
 405             if (contextNode.Name == nav.Name && BasicNodeType(contextNode.NodeType) == BasicNodeType(nav.NodeType)) {
 406                 return true;
 407             }
 408             return false;
 409         }
 410
 411         private XPathNodeType BasicNodeType(XPathNodeType type) {
 412             if(type == XPathNodeType.SignificantWhitespace || type == XPathNodeType.Whitespace) {
 413                 return XPathNodeType.Text;
 414             }
 415             else {
 416                 return type;
 417             }
 418         }
 419
 420         // Microsoft: perf.
 421         // for each call to xsl:number Format() will build new NumberingFormat object.
 422         // in case of no AVTs we can build this object at compile time and reuse it on execution time.
 423         // even partial step in this d---- will be usefull (when cFormats == 0)
 424
 425         private static string Format(ArrayList numberlist, List<FormatInfo> tokens, string lang, string letter, string groupingSep, string groupingSize) {
 426             StringBuilder result = new StringBuilder();
 427             int cFormats = 0;
 428             if (tokens != null) {
 429                 cFormats = tokens.Count;
 430             }
 431
 432             NumberingFormat numberingFormat = new NumberingFormat();
 433             if (groupingSize != null) {
 434                 try {
 435                     numberingFormat.setGroupingSize(Convert.ToInt32(groupingSize, CultureInfo.InvariantCulture));
 436                 }
 437                 catch (System.FormatException) {}
 438                 catch (System.OverflowException) {}
 439             }
 440             if (groupingSep != null) {
 441                 if (groupingSep.Length > 1) {
 442                     // It is a breaking change to throw an exception, SQLBUDT 324367
 443                     //throw XsltException.Create(Res.Xslt_CharAttribute, "grouping-separator");
 444                 }
 445                 numberingFormat.setGroupingSeparator(groupingSep);
 446             }
 447             if (0 < cFormats) {
 448                 FormatInfo prefix = tokens[0];
 449                 Debug.Assert(prefix == null || prefix.isSeparator);
 450                 FormatInfo sufix = null;
 451                 if (cFormats % 2 == 1) {
 452                     sufix = tokens[cFormats - 1];
 453                     cFormats --;
 454                 }
 455                 FormatInfo periodicSeparator = 2 < cFormats ? tokens[cFormats - 2] : DefaultSeparator;
 456                 FormatInfo periodicFormat    = 0 < cFormats ? tokens[cFormats - 1] : DefaultFormat   ;
 457                 if (prefix != null) {
 458                     result.Append(prefix.formatString);
 459                 }
 460                 int numberlistCount = numberlist.Count;
 461                 for(int i = 0; i < numberlistCount; i++ ) {
 462                     int formatIndex   = i * 2;
 463                     bool haveFormat = formatIndex < cFormats;
 464                     if (0 < i) {
 465                         FormatInfo thisSeparator = haveFormat ? tokens[formatIndex + 0] : periodicSeparator;
 466                         Debug.Assert(thisSeparator.isSeparator);
 467                         result.Append(thisSeparator.formatString);
 468                     }
 469
 470                     FormatInfo thisFormat = haveFormat ? tokens[formatIndex + 1] : periodicFormat;
 471                     Debug.Assert(!thisFormat.isSeparator);
 472
 473                     //numberingFormat.setletter(this.letter);
 474                     //numberingFormat.setLang(this.lang);
 475
 476                     numberingFormat.setNumberingType(thisFormat.numSequence);
 477                     numberingFormat.setMinLen(thisFormat.length);
 478                     result.Append(numberingFormat.FormatItem(numberlist[i]));
 479                 }
 480
 481                 if (sufix != null) {
 482                     result.Append(sufix.formatString);
 483                 }
 484             }
 485             else {
 486                 numberingFormat.setNumberingType(NumberingSequence.Arabic);
 487                 for (int i = 0; i < numberlist.Count; i++) {
 488                     if (i != 0) {
 489                         result.Append(".");
 490                     }
 491                     result.Append(numberingFormat.FormatItem(numberlist[i]));
 492                 }
 493             }
 494             return result.ToString();
 495         }
 496
 497         /*
 498         ----------------------------------------------------------------------------
 499             mapFormatToken()
 500
 501             Maps a token of alphanumeric characters to a numbering format ID and a
 502             minimum length bound.  Tokens specify the character(s) that begins a
 503             Unicode
 504             numbering sequence.  For example, "i" specifies lower case roman numeral
 505             numbering.  Leading "zeros" specify a minimum length to be maintained by
 506             padding, if necessary.
 507         ----------------------------------------------------------------------------
 508         */
 509         private static void mapFormatToken(String wsToken, int startLen, int tokLen, out NumberingSequence seq, out int pminlen) {
 510             char wch = wsToken[startLen];
 511             bool UseArabic = false;
 512             pminlen = 1;
 513             seq = NumberingSequence.Nil;
 514
 515             switch ((int)wch) {
 516             case 0x0030:    // Digit zero
 517             case 0x0966:    // Hindi digit zero
 518             case 0x0e50:    // Thai digit zero
 519             case 0xc77b:    // Korean digit zero
 520             case 0xff10:    // Digit zero (double-byte)
 521                 do {
 522                     // Leading zeros request padding.  Track how much.
 523                     pminlen++;
 524                 } while ((--tokLen > 0) && (wch == wsToken[++startLen]));
 525
 526                 if (wsToken[startLen] != (char)(wch + 1)) {
 527                     // If next character isn't "one", then use Arabic
 528                     UseArabic = true;
 529                 }
 530                 break;
 531             }
 532
 533             if (!UseArabic) {
 534                 // Map characters of token to number format ID
 535                 switch ((int)wsToken[startLen]) {
 536                 case 0x0031: seq = NumberingSequence.Arabic; break;
 537                 case 0x0041: seq = NumberingSequence.UCLetter; break;
 538                 case 0x0049: seq = NumberingSequence.UCRoman; break;
 539                 case 0x0061: seq = NumberingSequence.LCLetter; break;
 540                 case 0x0069: seq = NumberingSequence.LCRoman; break;
 541                 case 0x0410: seq = NumberingSequence.UCRus; break;
 542                 case 0x0430: seq = NumberingSequence.LCRus; break;
 543                 case 0x05d0: seq = NumberingSequence.Hebrew; break;
 544                 case 0x0623: seq = NumberingSequence.ArabicScript; break;
 545                 case 0x0905: seq = NumberingSequence.Hindi2; break;
 546                 case 0x0915: seq = NumberingSequence.Hindi1; break;
 547                 case 0x0967: seq = NumberingSequence.Hindi3; break;
 548                 case 0x0e01: seq = NumberingSequence.Thai1; break;
 549                 case 0x0e51: seq = NumberingSequence.Thai2; break;
 550                 case 0x30a2: seq = NumberingSequence.DAiueo; break;
 551                 case 0x30a4: seq = NumberingSequence.DIroha; break;
 552                 case 0x3131: seq = NumberingSequence.DChosung; break;
 553                 case 0x4e00: seq = NumberingSequence.FEDecimal; break;
 554                 case 0x58f1: seq = NumberingSequence.DbNum3; break;
 555                 case 0x58f9: seq = NumberingSequence.ChnCmplx; break;
 556                 case 0x5b50: seq = NumberingSequence.Zodiac2; break;
 557                 case 0xac00: seq = NumberingSequence.Ganada; break;
 558                 case 0xc77c: seq = NumberingSequence.KorDbNum1; break;
 559                 case 0xd558: seq = NumberingSequence.KorDbNum3; break;
 560                 case 0xff11: seq = NumberingSequence.DArabic; break;
 561                 case 0xff71: seq = NumberingSequence.Aiueo; break;
 562                 case 0xff72: seq = NumberingSequence.Iroha; break;
 563
 564                 case 0x7532:
 565                     if (tokLen > 1 && wsToken[startLen + 1] == 0x5b50) {
 566                         // 60-based Zodiak numbering begins with two characters
 567                         seq = NumberingSequence.Zodiac3;
 568                         tokLen--;
 569                         startLen++;
 570                     }
 571                     else {
 572                         // 10-based Zodiak numbering begins with one character
 573                         seq = NumberingSequence.Zodiac1;
 574                     }
 575                     break;
 576                 default:
 577                     seq = NumberingSequence.Arabic;
 578                     break;
 579                 }
 580             }
 581
 582             //if (tokLen != 1 || UseArabic) {
 583             if (UseArabic) {
 584                 // If remaining token length is not 1, then don't recognize
 585                 // sequence and default to Arabic with no zero padding.
 586                 seq = NumberingSequence.Arabic;
 587                 pminlen = 0;
 588             }
 589         }
 590
 591
 592         /*
 593         ----------------------------------------------------------------------------
 594             parseFormat()
 595
 596             Parse format string into format tokens (alphanumeric) and separators
 597             (non-alphanumeric).
 598
 599         */
 600         private static List<FormatInfo> ParseFormat(string formatString) {
 601             if (formatString == null || formatString.Length == 0) {
 602                 return null;
 603             }
 604             int length = 0;
 605             bool lastAlphaNumeric = CharUtil.IsAlphaNumeric(formatString[length]);
 606             List<FormatInfo> tokens = new List<FormatInfo>();
 607             int count = 0;
 608
 609             if (lastAlphaNumeric) {
 610                 // If the first one is alpha num add empty separator as a prefix.
 611                 tokens.Add(null);
 612             }
 613
 614             while (length <= formatString.Length) {
 615                 // Loop until a switch from format token to separator is detected (or vice-versa)
 616                 bool currentchar = length < formatString.Length ? CharUtil.IsAlphaNumeric(formatString[length]) : !lastAlphaNumeric;
 617                 if (lastAlphaNumeric != currentchar) {
 618                     FormatInfo formatInfo = new FormatInfo();
 619                     if (lastAlphaNumeric) {
 620                         // We just finished a format token.  Map it to a numbering format ID and a min-length bound.
 621                         mapFormatToken(formatString, count, length - count, out formatInfo.numSequence, out formatInfo.length);
 622                     }
 623                     else {
 624                         formatInfo.isSeparator = true;
 625                         // We just finished a separator.  Save its length and a pointer to it.
 626                         formatInfo.formatString = formatString.Substring(count, length - count);
 627                     }
 628                     count = length;
 629                     length++;
 630                     // Begin parsing the next format token or separator
 631
 632                     tokens.Add(formatInfo);
 633                     // Flip flag from format token to separator (or vice-versa)
 634                     lastAlphaNumeric = currentchar;
 635                 }
 636                 else {
 637                     length++;
 638                 }
 639             }
 640
 641             return tokens;
 642         }
 643
 644         private string ParseLetter(string letter) {
 645             if (letter == null || letter == "traditional" || letter == "alphabetic") {
 646                 return letter;
 647             }
 648             if (! this.forwardCompatibility) {
 649                 throw XsltException.Create(Res.Xslt_InvalidAttrValue, "letter-value", letter);
 650             }
 651             return null;
 652         }
 653     }
 654 }