FacetsChecker.cs

Go to the documentation of this file.

using System.Collections;
using System.Text;
using System.Text.RegularExpressions;
 
namespace System.Xml.Schema;
 
internal abstract class FacetsChecker
{
    private struct FacetsCompiler
    {
        private struct Map
        {
            internal char match;
 
            internal string replacement;
 
            internal Map(char m, string r)
            {
                match = m;
                replacement = r;
            }
        }
 
        private readonly DatatypeImplementation _datatype;
 
        private readonly RestrictionFacets _derivedRestriction;
 
        private readonly RestrictionFlags _baseFlags;
 
        private readonly RestrictionFlags _baseFixedFlags;
 
        private readonly RestrictionFlags _validRestrictionFlags;
 
        private readonly XmlSchemaDatatype _nonNegativeInt;
 
        private readonly XmlSchemaDatatype _builtInType;
 
        private readonly XmlTypeCode _builtInEnum;
 
        private bool _firstPattern;
 
        private StringBuilder _regStr;
 
        private XmlSchemaPatternFacet _pattern_facet;
 
        private static readonly Map[] s_map = new Map[8]
        {
            new Map('c', "\\p{_xmlC}"),
            new Map('C', "\\P{_xmlC}"),
            new Map('d', "\\p{_xmlD}"),
            new Map('D', "\\P{_xmlD}"),
            new Map('i', "\\p{_xmlI}"),
            new Map('I', "\\P{_xmlI}"),
            new Map('w', "\\p{_xmlW}"),
            new Map('W', "\\P{_xmlW}")
        };
 
        public FacetsCompiler(DatatypeImplementation baseDatatype, RestrictionFacets restriction)
        {
            _firstPattern = true;
            _regStr = null;
            _pattern_facet = null;
            _datatype = baseDatatype;
            _derivedRestriction = restriction;
            _baseFlags = ((_datatype.Restriction != null) ? _datatype.Restriction.Flags : ((RestrictionFlags)0));
            _baseFixedFlags = ((_datatype.Restriction != null) ? _datatype.Restriction.FixedFlags : ((RestrictionFlags)0));
            _validRestrictionFlags = _datatype.ValidRestrictionFlags;
            _nonNegativeInt = DatatypeImplementation.GetSimpleTypeFromTypeCode(XmlTypeCode.NonNegativeInteger).Datatype;
            _builtInEnum = ((!(_datatype is Datatype_union) && !(_datatype is Datatype_List)) ? _datatype.TypeCode : XmlTypeCode.None);
            _builtInType = ((_builtInEnum > XmlTypeCode.None) ? DatatypeImplementation.GetSimpleTypeFromTypeCode(_builtInEnum).Datatype : _datatype);
        }
 
        internal void CompileLengthFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.Length, System.SR.Sch_LengthFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.Length, System.SR.Sch_DupLengthFacet);
            _derivedRestriction.Length = XmlBaseConverter.DecimalToInt32((decimal)ParseFacetValue(_nonNegativeInt, facet, System.SR.Sch_LengthFacetInvalid, null, null));
            if ((_baseFixedFlags & RestrictionFlags.Length) != 0 && !_datatype.IsEqual(_datatype.Restriction.Length, _derivedRestriction.Length))
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            if ((_baseFlags & RestrictionFlags.Length) != 0 && _datatype.Restriction.Length < _derivedRestriction.Length)
            {
                throw new XmlSchemaException(System.SR.Sch_LengthGtBaseLength, facet);
            }
            if ((_baseFlags & RestrictionFlags.MinLength) != 0 && _datatype.Restriction.MinLength > _derivedRestriction.Length)
            {
                throw new XmlSchemaException(System.SR.Sch_MaxMinLengthBaseLength, facet);
            }
            if ((_baseFlags & RestrictionFlags.MaxLength) != 0 && _datatype.Restriction.MaxLength < _derivedRestriction.Length)
            {
                throw new XmlSchemaException(System.SR.Sch_MaxMinLengthBaseLength, facet);
            }
            SetFlag(facet, RestrictionFlags.Length);
        }
 
        internal void CompileMinLengthFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.MinLength, System.SR.Sch_MinLengthFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.MinLength, System.SR.Sch_DupMinLengthFacet);
            _derivedRestriction.MinLength = XmlBaseConverter.DecimalToInt32((decimal)ParseFacetValue(_nonNegativeInt, facet, System.SR.Sch_MinLengthFacetInvalid, null, null));
            if ((_baseFixedFlags & RestrictionFlags.MinLength) != 0 && !_datatype.IsEqual(_datatype.Restriction.MinLength, _derivedRestriction.MinLength))
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            if ((_baseFlags & RestrictionFlags.MinLength) != 0 && _datatype.Restriction.MinLength > _derivedRestriction.MinLength)
            {
                throw new XmlSchemaException(System.SR.Sch_MinLengthGtBaseMinLength, facet);
            }
            if ((_baseFlags & RestrictionFlags.Length) != 0 && _datatype.Restriction.Length < _derivedRestriction.MinLength)
            {
                throw new XmlSchemaException(System.SR.Sch_MaxMinLengthBaseLength, facet);
            }
            SetFlag(facet, RestrictionFlags.MinLength);
        }
 
        internal void CompileMaxLengthFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.MaxLength, System.SR.Sch_MaxLengthFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.MaxLength, System.SR.Sch_DupMaxLengthFacet);
            _derivedRestriction.MaxLength = XmlBaseConverter.DecimalToInt32((decimal)ParseFacetValue(_nonNegativeInt, facet, System.SR.Sch_MaxLengthFacetInvalid, null, null));
            if ((_baseFixedFlags & RestrictionFlags.MaxLength) != 0 && !_datatype.IsEqual(_datatype.Restriction.MaxLength, _derivedRestriction.MaxLength))
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            if ((_baseFlags & RestrictionFlags.MaxLength) != 0 && _datatype.Restriction.MaxLength < _derivedRestriction.MaxLength)
            {
                throw new XmlSchemaException(System.SR.Sch_MaxLengthGtBaseMaxLength, facet);
            }
            if ((_baseFlags & RestrictionFlags.Length) != 0 && _datatype.Restriction.Length > _derivedRestriction.MaxLength)
            {
                throw new XmlSchemaException(System.SR.Sch_MaxMinLengthBaseLength, facet);
            }
            SetFlag(facet, RestrictionFlags.MaxLength);
        }
 
        internal void CompilePatternFacet(XmlSchemaPatternFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.Pattern, System.SR.Sch_PatternFacetProhibited);
            if (_firstPattern)
            {
                _regStr = new StringBuilder();
                _regStr.Append('(');
                _regStr.Append(facet.Value);
                _pattern_facet = facet;
                _firstPattern = false;
            }
            else
            {
                _regStr.Append(")|(");
                _regStr.Append(facet.Value);
            }
            SetFlag(facet, RestrictionFlags.Pattern);
        }
 
        internal void CompileEnumerationFacet(XmlSchemaFacet facet, IXmlNamespaceResolver nsmgr, XmlNameTable nameTable)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.Enumeration, System.SR.Sch_EnumerationFacetProhibited);
            if (_derivedRestriction.Enumeration == null)
            {
                _derivedRestriction.Enumeration = new ArrayList();
            }
            _derivedRestriction.Enumeration.Add(ParseFacetValue(_datatype, facet, System.SR.Sch_EnumerationFacetInvalid, nsmgr, nameTable));
            SetFlag(facet, RestrictionFlags.Enumeration);
        }
 
        internal void CompileWhitespaceFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.WhiteSpace, System.SR.Sch_WhiteSpaceFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.WhiteSpace, System.SR.Sch_DupWhiteSpaceFacet);
            if (facet.Value == "preserve")
            {
                _derivedRestriction.WhiteSpace = XmlSchemaWhiteSpace.Preserve;
            }
            else if (facet.Value == "replace")
            {
                _derivedRestriction.WhiteSpace = XmlSchemaWhiteSpace.Replace;
            }
            else
            {
                if (!(facet.Value == "collapse"))
                {
                    throw new XmlSchemaException(System.SR.Sch_InvalidWhiteSpace, facet.Value, facet);
                }
                _derivedRestriction.WhiteSpace = XmlSchemaWhiteSpace.Collapse;
            }
            if ((_baseFixedFlags & RestrictionFlags.WhiteSpace) != 0 && !_datatype.IsEqual(_datatype.Restriction.WhiteSpace, _derivedRestriction.WhiteSpace))
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            XmlSchemaWhiteSpace xmlSchemaWhiteSpace = (((_baseFlags & RestrictionFlags.WhiteSpace) == 0) ? _datatype.BuiltInWhitespaceFacet : _datatype.Restriction.WhiteSpace);
            if (xmlSchemaWhiteSpace == XmlSchemaWhiteSpace.Collapse && (_derivedRestriction.WhiteSpace == XmlSchemaWhiteSpace.Replace || _derivedRestriction.WhiteSpace == XmlSchemaWhiteSpace.Preserve))
            {
                throw new XmlSchemaException(System.SR.Sch_WhiteSpaceRestriction1, facet);
            }
            if (xmlSchemaWhiteSpace == XmlSchemaWhiteSpace.Replace && _derivedRestriction.WhiteSpace == XmlSchemaWhiteSpace.Preserve)
            {
                throw new XmlSchemaException(System.SR.Sch_WhiteSpaceRestriction2, facet);
            }
            SetFlag(facet, RestrictionFlags.WhiteSpace);
        }
 
        internal void CompileMaxInclusiveFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.MaxInclusive, System.SR.Sch_MaxInclusiveFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.MaxInclusive, System.SR.Sch_DupMaxInclusiveFacet);
            _derivedRestriction.MaxInclusive = ParseFacetValue(_builtInType, facet, System.SR.Sch_MaxInclusiveFacetInvalid, null, null);
            if ((_baseFixedFlags & RestrictionFlags.MaxInclusive) != 0 && !_datatype.IsEqual(_datatype.Restriction.MaxInclusive, _derivedRestriction.MaxInclusive))
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            CheckValue(_derivedRestriction.MaxInclusive, facet);
            SetFlag(facet, RestrictionFlags.MaxInclusive);
        }
 
        internal void CompileMaxExclusiveFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.MaxExclusive, System.SR.Sch_MaxExclusiveFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.MaxExclusive, System.SR.Sch_DupMaxExclusiveFacet);
            _derivedRestriction.MaxExclusive = ParseFacetValue(_builtInType, facet, System.SR.Sch_MaxExclusiveFacetInvalid, null, null);
            if ((_baseFixedFlags & RestrictionFlags.MaxExclusive) != 0 && !_datatype.IsEqual(_datatype.Restriction.MaxExclusive, _derivedRestriction.MaxExclusive))
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            CheckValue(_derivedRestriction.MaxExclusive, facet);
            SetFlag(facet, RestrictionFlags.MaxExclusive);
        }
 
        internal void CompileMinInclusiveFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.MinInclusive, System.SR.Sch_MinInclusiveFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.MinInclusive, System.SR.Sch_DupMinInclusiveFacet);
            _derivedRestriction.MinInclusive = ParseFacetValue(_builtInType, facet, System.SR.Sch_MinInclusiveFacetInvalid, null, null);
            if ((_baseFixedFlags & RestrictionFlags.MinInclusive) != 0 && !_datatype.IsEqual(_datatype.Restriction.MinInclusive, _derivedRestriction.MinInclusive))
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            CheckValue(_derivedRestriction.MinInclusive, facet);
            SetFlag(facet, RestrictionFlags.MinInclusive);
        }
 
        internal void CompileMinExclusiveFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.MinExclusive, System.SR.Sch_MinExclusiveFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.MinExclusive, System.SR.Sch_DupMinExclusiveFacet);
            _derivedRestriction.MinExclusive = ParseFacetValue(_builtInType, facet, System.SR.Sch_MinExclusiveFacetInvalid, null, null);
            if ((_baseFixedFlags & RestrictionFlags.MinExclusive) != 0 && !_datatype.IsEqual(_datatype.Restriction.MinExclusive, _derivedRestriction.MinExclusive))
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            CheckValue(_derivedRestriction.MinExclusive, facet);
            SetFlag(facet, RestrictionFlags.MinExclusive);
        }
 
        internal void CompileTotalDigitsFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.TotalDigits, System.SR.Sch_TotalDigitsFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.TotalDigits, System.SR.Sch_DupTotalDigitsFacet);
            XmlSchemaDatatype datatype = DatatypeImplementation.GetSimpleTypeFromTypeCode(XmlTypeCode.PositiveInteger).Datatype;
            _derivedRestriction.TotalDigits = XmlBaseConverter.DecimalToInt32((decimal)ParseFacetValue(datatype, facet, System.SR.Sch_TotalDigitsFacetInvalid, null, null));
            if ((_baseFixedFlags & RestrictionFlags.TotalDigits) != 0 && _datatype.Restriction.TotalDigits != _derivedRestriction.TotalDigits)
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            if ((_baseFlags & RestrictionFlags.TotalDigits) != 0 && _derivedRestriction.TotalDigits > _datatype.Restriction.TotalDigits)
            {
                throw new XmlSchemaException(System.SR.Sch_TotalDigitsMismatch, string.Empty);
            }
            SetFlag(facet, RestrictionFlags.TotalDigits);
        }
 
        internal void CompileFractionDigitsFacet(XmlSchemaFacet facet)
        {
            CheckProhibitedFlag(facet, RestrictionFlags.FractionDigits, System.SR.Sch_FractionDigitsFacetProhibited);
            CheckDupFlag(facet, RestrictionFlags.FractionDigits, System.SR.Sch_DupFractionDigitsFacet);
            _derivedRestriction.FractionDigits = XmlBaseConverter.DecimalToInt32((decimal)ParseFacetValue(_nonNegativeInt, facet, System.SR.Sch_FractionDigitsFacetInvalid, null, null));
            if (_derivedRestriction.FractionDigits != 0 && _datatype.TypeCode != XmlTypeCode.Decimal)
            {
                throw new XmlSchemaException(System.SR.Sch_FractionDigitsFacetInvalid, System.SR.Sch_FractionDigitsNotOnDecimal, facet);
            }
            if ((_baseFixedFlags & RestrictionFlags.FractionDigits) != 0 && _datatype.Restriction.FractionDigits != _derivedRestriction.FractionDigits)
            {
                throw new XmlSchemaException(System.SR.Sch_FacetBaseFixed, facet);
            }
            if ((_baseFlags & RestrictionFlags.FractionDigits) != 0 && _derivedRestriction.FractionDigits > _datatype.Restriction.FractionDigits)
            {
                throw new XmlSchemaException(System.SR.Sch_FractionDigitsMismatch, string.Empty);
            }
            SetFlag(facet, RestrictionFlags.FractionDigits);
        }
 
        internal void FinishFacetCompile()
        {
            if (_firstPattern)
            {
                return;
            }
            if (_derivedRestriction.Patterns == null)
            {
                _derivedRestriction.Patterns = new ArrayList();
            }
            try
            {
                _regStr.Append(')');
                string text = _regStr.ToString();
                if (text.Contains('|'))
                {
                    _regStr.Insert(0, '(');
                    _regStr.Append(')');
                }
                _derivedRestriction.Patterns.Add(new Regex(Preprocess(_regStr.ToString())));
            }
            catch (Exception ex)
            {
                throw new XmlSchemaException(System.SR.Sch_PatternFacetInvalid, new string[1] { ex.Message }, ex, _pattern_facet.SourceUri, _pattern_facet.LineNumber, _pattern_facet.LinePosition, _pattern_facet);
            }
        }
 
        private void CheckValue(object value, XmlSchemaFacet facet)
        {
            RestrictionFacets restriction = _datatype.Restriction;
            switch (facet.FacetType)
            {
            case FacetType.MaxInclusive:
                if ((_baseFlags & RestrictionFlags.MaxInclusive) != 0 && _datatype.Compare(value, restriction.MaxInclusive) > 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MaxInclusiveMismatch, string.Empty);
                }
                if ((_baseFlags & RestrictionFlags.MaxExclusive) != 0 && _datatype.Compare(value, restriction.MaxExclusive) >= 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MaxIncExlMismatch, string.Empty);
                }
                break;
            case FacetType.MaxExclusive:
                if ((_baseFlags & RestrictionFlags.MaxExclusive) != 0 && _datatype.Compare(value, restriction.MaxExclusive) > 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MaxExclusiveMismatch, string.Empty);
                }
                if ((_baseFlags & RestrictionFlags.MaxInclusive) != 0 && _datatype.Compare(value, restriction.MaxInclusive) > 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MaxExlIncMismatch, string.Empty);
                }
                break;
            case FacetType.MinInclusive:
                if ((_baseFlags & RestrictionFlags.MinInclusive) != 0 && _datatype.Compare(value, restriction.MinInclusive) < 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MinInclusiveMismatch, string.Empty);
                }
                if ((_baseFlags & RestrictionFlags.MinExclusive) != 0 && _datatype.Compare(value, restriction.MinExclusive) < 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MinIncExlMismatch, string.Empty);
                }
                if ((_baseFlags & RestrictionFlags.MaxExclusive) != 0 && _datatype.Compare(value, restriction.MaxExclusive) >= 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MinIncMaxExlMismatch, string.Empty);
                }
                break;
            case FacetType.MinExclusive:
                if ((_baseFlags & RestrictionFlags.MinExclusive) != 0 && _datatype.Compare(value, restriction.MinExclusive) < 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MinExclusiveMismatch, string.Empty);
                }
                if ((_baseFlags & RestrictionFlags.MinInclusive) != 0 && _datatype.Compare(value, restriction.MinInclusive) < 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MinExlIncMismatch, string.Empty);
                }
                if ((_baseFlags & RestrictionFlags.MaxExclusive) != 0 && _datatype.Compare(value, restriction.MaxExclusive) >= 0)
                {
                    throw new XmlSchemaException(System.SR.Sch_MinExlMaxExlMismatch, string.Empty);
                }
                break;
            }
        }
 
        internal void CompileFacetCombinations()
        {
            if ((_derivedRestriction.Flags & RestrictionFlags.MaxInclusive) != 0 && (_derivedRestriction.Flags & RestrictionFlags.MaxExclusive) != 0)
            {
                throw new XmlSchemaException(System.SR.Sch_MaxInclusiveExclusive, string.Empty);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MinInclusive) != 0 && (_derivedRestriction.Flags & RestrictionFlags.MinExclusive) != 0)
            {
                throw new XmlSchemaException(System.SR.Sch_MinInclusiveExclusive, string.Empty);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.Length) != 0 && (_derivedRestriction.Flags & (RestrictionFlags.MinLength | RestrictionFlags.MaxLength)) != 0)
            {
                throw new XmlSchemaException(System.SR.Sch_LengthAndMinMax, string.Empty);
            }
            CopyFacetsFromBaseType();
            if ((_derivedRestriction.Flags & RestrictionFlags.MinLength) != 0 && (_derivedRestriction.Flags & RestrictionFlags.MaxLength) != 0 && _derivedRestriction.MinLength > _derivedRestriction.MaxLength)
            {
                throw new XmlSchemaException(System.SR.Sch_MinLengthGtMaxLength, string.Empty);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MinInclusive) != 0 && (_derivedRestriction.Flags & RestrictionFlags.MaxInclusive) != 0 && _datatype.Compare(_derivedRestriction.MinInclusive, _derivedRestriction.MaxInclusive) > 0)
            {
                throw new XmlSchemaException(System.SR.Sch_MinInclusiveGtMaxInclusive, string.Empty);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MinInclusive) != 0 && (_derivedRestriction.Flags & RestrictionFlags.MaxExclusive) != 0 && _datatype.Compare(_derivedRestriction.MinInclusive, _derivedRestriction.MaxExclusive) > 0)
            {
                throw new XmlSchemaException(System.SR.Sch_MinInclusiveGtMaxExclusive, string.Empty);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MinExclusive) != 0 && (_derivedRestriction.Flags & RestrictionFlags.MaxExclusive) != 0 && _datatype.Compare(_derivedRestriction.MinExclusive, _derivedRestriction.MaxExclusive) > 0)
            {
                throw new XmlSchemaException(System.SR.Sch_MinExclusiveGtMaxExclusive, string.Empty);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MinExclusive) != 0 && (_derivedRestriction.Flags & RestrictionFlags.MaxInclusive) != 0 && _datatype.Compare(_derivedRestriction.MinExclusive, _derivedRestriction.MaxInclusive) > 0)
            {
                throw new XmlSchemaException(System.SR.Sch_MinExclusiveGtMaxInclusive, string.Empty);
            }
            if ((_derivedRestriction.Flags & (RestrictionFlags.TotalDigits | RestrictionFlags.FractionDigits)) == (RestrictionFlags.TotalDigits | RestrictionFlags.FractionDigits) && _derivedRestriction.FractionDigits > _derivedRestriction.TotalDigits)
            {
                throw new XmlSchemaException(System.SR.Sch_FractionDigitsGtTotalDigits, string.Empty);
            }
        }
 
        private void CopyFacetsFromBaseType()
        {
            RestrictionFacets restriction = _datatype.Restriction;
            if ((_derivedRestriction.Flags & RestrictionFlags.Length) == 0 && (_baseFlags & RestrictionFlags.Length) != 0)
            {
                _derivedRestriction.Length = restriction.Length;
                SetFlag(RestrictionFlags.Length);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MinLength) == 0 && (_baseFlags & RestrictionFlags.MinLength) != 0)
            {
                _derivedRestriction.MinLength = restriction.MinLength;
                SetFlag(RestrictionFlags.MinLength);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MaxLength) == 0 && (_baseFlags & RestrictionFlags.MaxLength) != 0)
            {
                _derivedRestriction.MaxLength = restriction.MaxLength;
                SetFlag(RestrictionFlags.MaxLength);
            }
            if ((_baseFlags & RestrictionFlags.Pattern) != 0)
            {
                if (_derivedRestriction.Patterns == null)
                {
                    _derivedRestriction.Patterns = restriction.Patterns;
                }
                else
                {
                    _derivedRestriction.Patterns.AddRange(restriction.Patterns);
                }
                SetFlag(RestrictionFlags.Pattern);
            }
            if ((_baseFlags & RestrictionFlags.Enumeration) != 0)
            {
                if (_derivedRestriction.Enumeration == null)
                {
                    _derivedRestriction.Enumeration = restriction.Enumeration;
                }
                SetFlag(RestrictionFlags.Enumeration);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.WhiteSpace) == 0 && (_baseFlags & RestrictionFlags.WhiteSpace) != 0)
            {
                _derivedRestriction.WhiteSpace = restriction.WhiteSpace;
                SetFlag(RestrictionFlags.WhiteSpace);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MaxInclusive) == 0 && (_baseFlags & RestrictionFlags.MaxInclusive) != 0)
            {
                _derivedRestriction.MaxInclusive = restriction.MaxInclusive;
                SetFlag(RestrictionFlags.MaxInclusive);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MaxExclusive) == 0 && (_baseFlags & RestrictionFlags.MaxExclusive) != 0)
            {
                _derivedRestriction.MaxExclusive = restriction.MaxExclusive;
                SetFlag(RestrictionFlags.MaxExclusive);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MinInclusive) == 0 && (_baseFlags & RestrictionFlags.MinInclusive) != 0)
            {
                _derivedRestriction.MinInclusive = restriction.MinInclusive;
                SetFlag(RestrictionFlags.MinInclusive);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.MinExclusive) == 0 && (_baseFlags & RestrictionFlags.MinExclusive) != 0)
            {
                _derivedRestriction.MinExclusive = restriction.MinExclusive;
                SetFlag(RestrictionFlags.MinExclusive);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.TotalDigits) == 0 && (_baseFlags & RestrictionFlags.TotalDigits) != 0)
            {
                _derivedRestriction.TotalDigits = restriction.TotalDigits;
                SetFlag(RestrictionFlags.TotalDigits);
            }
            if ((_derivedRestriction.Flags & RestrictionFlags.FractionDigits) == 0 && (_baseFlags & RestrictionFlags.FractionDigits) != 0)
            {
                _derivedRestriction.FractionDigits = restriction.FractionDigits;
                SetFlag(RestrictionFlags.FractionDigits);
            }
        }
 
        private object ParseFacetValue(XmlSchemaDatatype datatype, XmlSchemaFacet facet, string code, IXmlNamespaceResolver nsmgr, XmlNameTable nameTable)
        {
            object typedValue;
            Exception ex = datatype.TryParseValue(facet.Value, nameTable, nsmgr, out typedValue);
            if (ex == null)
            {
                return typedValue;
            }
            throw new XmlSchemaException(code, new string[1] { ex.Message }, ex, facet.SourceUri, facet.LineNumber, facet.LinePosition, facet);
        }
 
        private static string Preprocess(string pattern)
        {
            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.Append('^');
            char[] array = pattern.ToCharArray();
            int length = pattern.Length;
            int num = 0;
            for (int i = 0; i < length - 2; i++)
            {
                if (array[i] != '\\')
                {
                    continue;
                }
                if (array[i + 1] == '\\')
                {
                    i++;
                    continue;
                }
                char c = array[i + 1];
                for (int j = 0; j < s_map.Length; j++)
                {
                    if (s_map[j].match == c)
                    {
                        if (num < i)
                        {
                            stringBuilder.Append(array, num, i - num);
                        }
                        stringBuilder.Append(s_map[j].replacement);
                        i++;
                        num = i + 1;
                        break;
                    }
                }
            }
            if (num < length)
            {
                stringBuilder.Append(array, num, length - num);
            }
            stringBuilder.Append('$');
            return stringBuilder.ToString();
        }
 
        private void CheckProhibitedFlag(XmlSchemaFacet facet, RestrictionFlags flag, string errorCode)
        {
            if ((_validRestrictionFlags & flag) == 0)
            {
                throw new XmlSchemaException(errorCode, _datatype.TypeCodeString, facet);
            }
        }
 
        private void CheckDupFlag(XmlSchemaFacet facet, RestrictionFlags flag, string errorCode)
        {
            if ((_derivedRestriction.Flags & flag) != 0)
            {
                throw new XmlSchemaException(errorCode, facet);
            }
        }
 
        private void SetFlag(XmlSchemaFacet facet, RestrictionFlags flag)
        {
            _derivedRestriction.Flags |= flag;
            if (facet.IsFixed)
            {
                _derivedRestriction.FixedFlags |= flag;
            }
        }
 
        private void SetFlag(RestrictionFlags flag)
        {
            _derivedRestriction.Flags |= flag;
            if ((_baseFixedFlags & flag) != 0)
            {
                _derivedRestriction.FixedFlags |= flag;
            }
        }
    }
 
    internal virtual Exception CheckLexicalFacets(ref string parseString, XmlSchemaDatatype datatype)
    {
        CheckWhitespaceFacets(ref parseString, datatype);
        return CheckPatternFacets(datatype.Restriction, parseString);
    }
 
    internal virtual Exception CheckValueFacets(object value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(decimal value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(long value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(int value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(short value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(DateTime value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(double value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(float value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(string value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(byte[] value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(TimeSpan value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal virtual Exception CheckValueFacets(XmlQualifiedName value, XmlSchemaDatatype datatype)
    {
        return null;
    }
 
    internal void CheckWhitespaceFacets(ref string s, XmlSchemaDatatype datatype)
    {
        RestrictionFacets restriction = datatype.Restriction;
        switch (datatype.Variety)
        {
        case XmlSchemaDatatypeVariety.List:
            s = s.Trim();
            break;
        case XmlSchemaDatatypeVariety.Atomic:
            if (datatype.BuiltInWhitespaceFacet == XmlSchemaWhiteSpace.Collapse)
            {
                s = XmlComplianceUtil.NonCDataNormalize(s);
            }
            else if (datatype.BuiltInWhitespaceFacet == XmlSchemaWhiteSpace.Replace)
            {
                s = XmlComplianceUtil.CDataNormalize(s);
            }
            else if (restriction != null && (restriction.Flags & RestrictionFlags.WhiteSpace) != 0)
            {
                if (restriction.WhiteSpace == XmlSchemaWhiteSpace.Replace)
                {
                    s = XmlComplianceUtil.CDataNormalize(s);
                }
                else if (restriction.WhiteSpace == XmlSchemaWhiteSpace.Collapse)
                {
                    s = XmlComplianceUtil.NonCDataNormalize(s);
                }
            }
            break;
        }
    }
 
    internal Exception CheckPatternFacets(RestrictionFacets restriction, string value)
    {
        if (restriction != null && (restriction.Flags & RestrictionFlags.Pattern) != 0)
        {
            for (int i = 0; i < restriction.Patterns.Count; i++)
            {
                Regex regex = (Regex)restriction.Patterns[i];
                if (!regex.IsMatch(value))
                {
                    return new XmlSchemaException(System.SR.Sch_PatternConstraintFailed, string.Empty);
                }
            }
        }
        return null;
    }
 
    internal virtual bool MatchEnumeration(object value, ArrayList enumeration, XmlSchemaDatatype datatype)
    {
        return false;
    }
 
    internal virtual RestrictionFacets ConstructRestriction(DatatypeImplementation datatype, XmlSchemaObjectCollection facets, XmlNameTable nameTable)
    {
        RestrictionFacets restrictionFacets = new RestrictionFacets();
        FacetsCompiler facetsCompiler = new FacetsCompiler(datatype, restrictionFacets);
        for (int i = 0; i < facets.Count; i++)
        {
            XmlSchemaFacet xmlSchemaFacet = (XmlSchemaFacet)facets[i];
            if (xmlSchemaFacet.Value == null)
            {
                throw new XmlSchemaException(System.SR.Sch_InvalidFacet, xmlSchemaFacet);
            }
            IXmlNamespaceResolver nsmgr = new SchemaNamespaceManager(xmlSchemaFacet);
            switch (xmlSchemaFacet.FacetType)
            {
            case FacetType.Length:
                facetsCompiler.CompileLengthFacet(xmlSchemaFacet);
                break;
            case FacetType.MinLength:
                facetsCompiler.CompileMinLengthFacet(xmlSchemaFacet);
                break;
            case FacetType.MaxLength:
                facetsCompiler.CompileMaxLengthFacet(xmlSchemaFacet);
                break;
            case FacetType.Pattern:
                facetsCompiler.CompilePatternFacet(xmlSchemaFacet as XmlSchemaPatternFacet);
                break;
            case FacetType.Enumeration:
                facetsCompiler.CompileEnumerationFacet(xmlSchemaFacet, nsmgr, nameTable);
                break;
            case FacetType.Whitespace:
                facetsCompiler.CompileWhitespaceFacet(xmlSchemaFacet);
                break;
            case FacetType.MinInclusive:
                facetsCompiler.CompileMinInclusiveFacet(xmlSchemaFacet);
                break;
            case FacetType.MinExclusive:
                facetsCompiler.CompileMinExclusiveFacet(xmlSchemaFacet);
                break;
            case FacetType.MaxInclusive:
                facetsCompiler.CompileMaxInclusiveFacet(xmlSchemaFacet);
                break;
            case FacetType.MaxExclusive:
                facetsCompiler.CompileMaxExclusiveFacet(xmlSchemaFacet);
                break;
            case FacetType.TotalDigits:
                facetsCompiler.CompileTotalDigitsFacet(xmlSchemaFacet);
                break;
            case FacetType.FractionDigits:
                facetsCompiler.CompileFractionDigitsFacet(xmlSchemaFacet);
                break;
            default:
                throw new XmlSchemaException(System.SR.Sch_UnknownFacet, xmlSchemaFacet);
            }
        }
        facetsCompiler.FinishFacetCompile();
        facetsCompiler.CompileFacetCombinations();
        return restrictionFacets;
    }
 
    internal static decimal Power(int x, int y)
    {
        decimal result = 1m;
        decimal num = x;
        if (y > 28)
        {
            return decimal.MaxValue;
        }
        for (int i = 0; i < y; i++)
        {
            result *= num;
        }
        return result;
    }
}