Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / MS / Internal / IO / Packaging / CompoundFile / CompoundFileStreamReference.cs / 1305600 / CompoundFileStreamReference.cs
//------------------------------------------------------------------------------ // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // Definition of the CompoundFileStreamReference class. // // History: // 03/27/2002: BruceMac: Initial implementation. // 05/20/2003: RogerCh: Ported to WCP tree. // 08/11/2003: LGolding: Fix Bug 864168 (some of BruceMac's bug fixes were lost // in port to WCP tree). // //----------------------------------------------------------------------------- using System; using System.IO; using System.Text; // for StringBuilder using System.Windows; using MS.Internal.WindowsBase; namespace MS.Internal.IO.Packaging.CompoundFile { ////// Logical reference to a container stream /// ////// Use this class to represent a logical reference to a container stream, /// internal class CompoundFileStreamReference : CompoundFileReference, IComparable { //----------------------------------------------------- // // Public Properties // //----------------------------------------------------- ////// Full path from the root to this stream /// public override string FullName { get { return _fullName; } } //------------------------------------------------------ // // Public Methods // //----------------------------------------------------- #region Constructors ////// Use when you know the full path /// /// whack-delimited name including at least the stream name and optionally including preceding storage names public CompoundFileStreamReference(string fullName) { SetFullName(fullName); } ////// Full featured constructor /// /// optional string describing the storage name - may be null if stream exists in the root storage /// stream name ///streamName cannot be null or empty public CompoundFileStreamReference(string storageName, string streamName) { ContainerUtilities.CheckStringAgainstNullAndEmpty( streamName, "streamName" ); if ((storageName == null) || (storageName.Length == 0)) _fullName = streamName; else { // preallocate space for the stream we are building StringBuilder sb = new StringBuilder(storageName, storageName.Length + 1 + streamName.Length); sb.Append(ContainerUtilities.PathSeparator); sb.Append(streamName); _fullName = sb.ToString(); } } #endregion #region Operators ///Compare for equality /// the CompoundFileReference to compare to public override bool Equals(object o) { if (o == null) return false; // Standard behavior. // support subclassing - our subclasses can call us and do any additive work themselves if (o.GetType() != this.GetType()) return false; CompoundFileStreamReference r = (CompoundFileStreamReference)o; return (String.CompareOrdinal(_fullName.ToUpperInvariant(), r._fullName.ToUpperInvariant()) == 0); } ///Returns an integer suitable for including this object in a hash table public override int GetHashCode() { return _fullName.GetHashCode(); } #endregion #region IComparable ////// Compares two CompoundFileReferences /// /// CompoundFileReference to compare to this one ///Supports the IComparable interface ///Less than zero if this instance is less than the given reference, zero if they are equal /// and greater than zero if this instance is greater than the given reference. Not case sensitive. int IComparable.CompareTo(object o) { if (o == null) return 1; // Standard behavior. // different type? if (o.GetType() != GetType()) throw new ArgumentException( SR.Get(SRID.CanNotCompareDiffTypes)); CompoundFileStreamReference r = (CompoundFileStreamReference)o; return String.CompareOrdinal(_fullName.ToUpperInvariant(), r._fullName.ToUpperInvariant()); } #endregion //------------------------------------------------------ // // Private Methods // //------------------------------------------------------ ////// Initialize _fullName /// ///this should only be called from constructors as references are immutable /// string to parse ///if leading or trailing path delimiter private void SetFullName(string fullName) { ContainerUtilities.CheckStringAgainstNullAndEmpty(fullName, "fullName"); // fail on leading path separator to match functionality across the board // Although we need to do ToUpperInvariant before we do string comparison, in this case // it is not necessary since PathSeparatorAsString is a path symbol if (fullName.StartsWith(ContainerUtilities.PathSeparatorAsString, StringComparison.Ordinal)) throw new ArgumentException( SR.Get(SRID.DelimiterLeading), "fullName"); _fullName = fullName; string[] strings = ContainerUtilities.ConvertBackSlashPathToStringArrayPath(fullName); if (strings.Length == 0) throw new ArgumentException( SR.Get(SRID.CompoundFilePathNullEmpty), "fullName"); } //----------------------------------------------------- // // Private members // //------------------------------------------------------ // this can never be null - use String.Empty private String _fullName; // whack-path } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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