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/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / MS / Internal / PartialArray.cs / 1 / PartialArray.cs
//---------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // Description: The PartialArray struct is used when the developer needs to pass a CLR array range to // a function that takes generic IList interface. For cases when the whole array needs to be passed, // CLR array already implements IList. // // // History: // 06/25/2004 : mleonov - Created // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics; using SR = MS.Internal.PresentationCore.SR; using SRID = MS.Internal.PresentationCore.SRID; namespace MS.Internal { ////// The PartialArray struct is used when someone needs to pass a CLR array range to /// a function that takes generic IList interface. For cases when the whole array needs to be passed, /// CLR array already implements IList. /// internal struct PartialArray: IList { private T[] _array; private int _initialIndex; private int _count; public PartialArray(T[] array, int initialIndex, int count) { // make sure early that the caller didn't miscalculate index and count Debug.Assert(initialIndex >= 0 && initialIndex + count <= array.Length); _array = array; _initialIndex = initialIndex; _count = count; } /// /// Convenience helper for passing the whole array. /// /// public PartialArray(T[] array) : this(array, 0, array.Length) {} #region IListMembers public bool IsReadOnly { get { return false; } } public bool Contains(T item) { return IndexOf(item) >= 0; } public bool IsFixedSize { get { return true; } } public bool Remove(T item) { throw new NotSupportedException(SR.Get(SRID.CollectionIsFixedSize)); } public void RemoveAt(int index) { throw new NotSupportedException(SR.Get(SRID.CollectionIsFixedSize)); } public void Clear() { throw new NotSupportedException(); } public void Add(T item) { throw new NotSupportedException(SR.Get(SRID.CollectionIsFixedSize)); } public void Insert(int index, T item) { throw new NotSupportedException(SR.Get(SRID.CollectionIsFixedSize)); } public T this[int index] { get { return _array[index + _initialIndex]; } set { _array[index + _initialIndex] = value; } } public int IndexOf(T item) { int index = Array.IndexOf (_array, item, _initialIndex, _count); if (index >= 0) { return index - _initialIndex; } else { return -1; } } #endregion #region ICollection Members public int Count { get { return _count; } } public void CopyTo(T[] array, int arrayIndex) { // parameter validations if (array == null) { throw new ArgumentNullException("array"); } if (array.Rank != 1) { throw new ArgumentException( SR.Get(SRID.Collection_CopyTo_ArrayCannotBeMultidimensional), "array"); } if (arrayIndex < 0) { throw new ArgumentOutOfRangeException("arrayIndex"); } if (arrayIndex >= array.Length) { throw new ArgumentException( SR.Get( SRID.Collection_CopyTo_IndexGreaterThanOrEqualToArrayLength, "arrayIndex", "array"), "arrayIndex"); } if ((array.Length - Count - arrayIndex) < 0) { throw new ArgumentException( SR.Get( SRID.Collection_CopyTo_NumberOfElementsExceedsArrayLength, "arrayIndex", "array")); } // do the copying here for (int i = 0; i < Count; i++) { array[arrayIndex + i] = this[i]; } } #endregion #region IEnumerable Members IEnumerator IEnumerable .GetEnumerator() { for (int i = 0; i < Count; i++) { yield return this[i]; } } #endregion #region IEnumerable Members IEnumerator IEnumerable.GetEnumerator() { return ((IEnumerable )this).GetEnumerator(); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // Description: The PartialArray struct is used when the developer needs to pass a CLR array range to // a function that takes generic IList interface. For cases when the whole array needs to be passed, // CLR array already implements IList. // // // History: // 06/25/2004 : mleonov - Created // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics; using SR = MS.Internal.PresentationCore.SR; using SRID = MS.Internal.PresentationCore.SRID; namespace MS.Internal { /// /// The PartialArray struct is used when someone needs to pass a CLR array range to /// a function that takes generic IList interface. For cases when the whole array needs to be passed, /// CLR array already implements IList. /// internal struct PartialArray: IList { private T[] _array; private int _initialIndex; private int _count; public PartialArray(T[] array, int initialIndex, int count) { // make sure early that the caller didn't miscalculate index and count Debug.Assert(initialIndex >= 0 && initialIndex + count <= array.Length); _array = array; _initialIndex = initialIndex; _count = count; } /// /// Convenience helper for passing the whole array. /// /// public PartialArray(T[] array) : this(array, 0, array.Length) {} #region IListMembers public bool IsReadOnly { get { return false; } } public bool Contains(T item) { return IndexOf(item) >= 0; } public bool IsFixedSize { get { return true; } } public bool Remove(T item) { throw new NotSupportedException(SR.Get(SRID.CollectionIsFixedSize)); } public void RemoveAt(int index) { throw new NotSupportedException(SR.Get(SRID.CollectionIsFixedSize)); } public void Clear() { throw new NotSupportedException(); } public void Add(T item) { throw new NotSupportedException(SR.Get(SRID.CollectionIsFixedSize)); } public void Insert(int index, T item) { throw new NotSupportedException(SR.Get(SRID.CollectionIsFixedSize)); } public T this[int index] { get { return _array[index + _initialIndex]; } set { _array[index + _initialIndex] = value; } } public int IndexOf(T item) { int index = Array.IndexOf (_array, item, _initialIndex, _count); if (index >= 0) { return index - _initialIndex; } else { return -1; } } #endregion #region ICollection Members public int Count { get { return _count; } } public void CopyTo(T[] array, int arrayIndex) { // parameter validations if (array == null) { throw new ArgumentNullException("array"); } if (array.Rank != 1) { throw new ArgumentException( SR.Get(SRID.Collection_CopyTo_ArrayCannotBeMultidimensional), "array"); } if (arrayIndex < 0) { throw new ArgumentOutOfRangeException("arrayIndex"); } if (arrayIndex >= array.Length) { throw new ArgumentException( SR.Get( SRID.Collection_CopyTo_IndexGreaterThanOrEqualToArrayLength, "arrayIndex", "array"), "arrayIndex"); } if ((array.Length - Count - arrayIndex) < 0) { throw new ArgumentException( SR.Get( SRID.Collection_CopyTo_NumberOfElementsExceedsArrayLength, "arrayIndex", "array")); } // do the copying here for (int i = 0; i < Count; i++) { array[arrayIndex + i] = this[i]; } } #endregion #region IEnumerable Members IEnumerator IEnumerable .GetEnumerator() { for (int i = 0; i < Count; i++) { yield return this[i]; } } #endregion #region IEnumerable Members IEnumerator IEnumerable.GetEnumerator() { return ((IEnumerable )this).GetEnumerator(); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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