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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Serialization / System / Xml / StringHandle.cs / 1305376 / StringHandle.cs
//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------- namespace System.Xml { using System.Runtime; enum StringHandleConstStringType { Type = 0, Root = 1, Item = 2 } class StringHandle { XmlBufferReader bufferReader; StringHandleType type; int key; int offset; int length; static string[] constStrings = { "type", "root", "item" }; public StringHandle(XmlBufferReader bufferReader) { this.bufferReader = bufferReader; SetValue(0, 0); } public void SetValue(int offset, int length) { this.type = StringHandleType.UTF8; this.offset = offset; this.length = length; } public void SetConstantValue(StringHandleConstStringType constStringType) { type = StringHandleType.ConstString; key = (int) constStringType; } public void SetValue(int offset, int length, bool escaped) { this.type = (escaped ? StringHandleType.EscapedUTF8 : StringHandleType.UTF8); this.offset = offset; this.length = length; } public void SetValue(int key) { this.type = StringHandleType.Dictionary; this.key = key; } public void SetValue(StringHandle value) { this.type = value.type; this.key = value.key; this.offset = value.offset; this.length = value.length; } public bool IsEmpty { get { if (type == StringHandleType.UTF8) return length == 0; return Equals2(string.Empty); } } public bool IsXmlns { get { if (type == StringHandleType.UTF8) { if (this.length != 5) return false; byte[] buffer = bufferReader.Buffer; int offset = this.offset; return buffer[offset + 0] == 'x' && buffer[offset + 1] == 'm' && buffer[offset + 2] == 'l' && buffer[offset + 3] == 'n' && buffer[offset + 4] == 's'; } return Equals2("xmlns"); } } public void ToPrefixHandle(PrefixHandle prefix) { Fx.Assert(type == StringHandleType.UTF8, ""); prefix.SetValue(offset, length); } public string GetString(XmlNameTable nameTable) { StringHandleType type = this.type; if (type == StringHandleType.UTF8) return bufferReader.GetString(offset, length, nameTable); if (type == StringHandleType.Dictionary) return nameTable.Add(bufferReader.GetDictionaryString(key).Value); if (type == StringHandleType.ConstString) return nameTable.Add(constStrings[key]); Fx.Assert(type == StringHandleType.EscapedUTF8, ""); return bufferReader.GetEscapedString(offset, length, nameTable); } public string GetString() { StringHandleType type = this.type; if (type == StringHandleType.UTF8) return bufferReader.GetString(offset, length); if (type == StringHandleType.Dictionary) return bufferReader.GetDictionaryString(key).Value; if (type == StringHandleType.ConstString) return constStrings[key]; Fx.Assert(type == StringHandleType.EscapedUTF8, ""); return bufferReader.GetEscapedString(offset, length); } public byte[] GetString(out int offset, out int length) { StringHandleType type = this.type; if (type == StringHandleType.UTF8) { offset = this.offset; length = this.length; return bufferReader.Buffer; } if (type == StringHandleType.Dictionary) { byte[] buffer = bufferReader.GetDictionaryString(this.key).ToUTF8(); offset = 0; length = buffer.Length; return buffer; } if (type == StringHandleType.ConstString) { byte[] buffer = XmlConverter.ToBytes(constStrings[key]); offset = 0; length = buffer.Length; return buffer; } else { Fx.Assert(type == StringHandleType.EscapedUTF8, ""); byte[] buffer = XmlConverter.ToBytes(bufferReader.GetEscapedString(this.offset, this.length)); offset = 0; length = buffer.Length; return buffer; } } public bool TryGetDictionaryString(out XmlDictionaryString value) { if (type == StringHandleType.Dictionary) { value = bufferReader.GetDictionaryString(key); return true; } else if (IsEmpty) { value = XmlDictionaryString.Empty; return true; } value = null; return false; } public override string ToString() { return GetString(); } bool Equals2(int key2, XmlBufferReader bufferReader2) { StringHandleType type = this.type; if (type == StringHandleType.Dictionary) return bufferReader.Equals2(this.key, key2, bufferReader2); if (type == StringHandleType.UTF8) return bufferReader.Equals2(this.offset, this.length, bufferReader2.GetDictionaryString(key2).Value); Fx.Assert(type == StringHandleType.EscapedUTF8 || type == StringHandleType.ConstString, ""); return GetString() == bufferReader.GetDictionaryString(key2).Value; } bool Equals2(XmlDictionaryString xmlString2) { StringHandleType type = this.type; if (type == StringHandleType.Dictionary) return bufferReader.Equals2(this.key, xmlString2); if (type == StringHandleType.UTF8) return bufferReader.Equals2(this.offset, this.length, xmlString2.ToUTF8()); Fx.Assert(type == StringHandleType.EscapedUTF8 || type == StringHandleType.ConstString, ""); return GetString() == xmlString2.Value; } bool Equals2(string s2) { StringHandleType type = this.type; if (type == StringHandleType.Dictionary) return bufferReader.GetDictionaryString(this.key).Value == s2; if (type == StringHandleType.UTF8) return bufferReader.Equals2(this.offset, this.length, s2); Fx.Assert(type == StringHandleType.EscapedUTF8 || type == StringHandleType.ConstString, ""); return GetString() == s2; } bool Equals2(int offset2, int length2, XmlBufferReader bufferReader2) { StringHandleType type = this.type; if (type == StringHandleType.Dictionary) return bufferReader2.Equals2(offset2, length2, bufferReader.GetDictionaryString(this.key).Value); if (type == StringHandleType.UTF8) return bufferReader.Equals2(this.offset, this.length, bufferReader2, offset2, length2); Fx.Assert(type == StringHandleType.EscapedUTF8 || type == StringHandleType.ConstString, ""); return GetString() == bufferReader.GetString(offset2, length2); } bool Equals2(StringHandle s2) { StringHandleType type = s2.type; if (type == StringHandleType.Dictionary) return Equals2(s2.key, s2.bufferReader); if (type == StringHandleType.UTF8) return Equals2(s2.offset, s2.length, s2.bufferReader); Fx.Assert(type == StringHandleType.EscapedUTF8 || type == StringHandleType.ConstString, ""); return Equals2(s2.GetString()); } static public bool operator ==(StringHandle s1, XmlDictionaryString xmlString2) { return s1.Equals2(xmlString2); } static public bool operator !=(StringHandle s1, XmlDictionaryString xmlString2) { return !s1.Equals2(xmlString2); } static public bool operator ==(StringHandle s1, string s2) { return s1.Equals2(s2); } static public bool operator !=(StringHandle s1, string s2) { return !s1.Equals2(s2); } static public bool operator ==(StringHandle s1, StringHandle s2) { return s1.Equals2(s2); } static public bool operator !=(StringHandle s1, StringHandle s2) { return !s1.Equals2(s2); } public int CompareTo(StringHandle that) { if (this.type == StringHandleType.UTF8 && that.type == StringHandleType.UTF8) return bufferReader.Compare(this.offset, this.length, that.offset, that.length); else return string.Compare(this.GetString(), that.GetString(), StringComparison.Ordinal); } public override bool Equals(object obj) { StringHandle that = obj as StringHandle; if (object.ReferenceEquals(that, null)) return false; return this == that; } public override int GetHashCode() { return GetString().GetHashCode(); } enum StringHandleType { Dictionary, UTF8, EscapedUTF8, ConstString } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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