119 lines
4.1 KiB
C#
119 lines
4.1 KiB
C#
//
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// System.Buffer.cs
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//
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// Authors:
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// Paolo Molaro (lupus@ximian.com)
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// Dan Lewis (dihlewis@yahoo.co.uk)
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//
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// (C) 2001 Ximian, Inc. http://www.ximian.com
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace System {
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[ComVisible (true)]
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public static class Buffer {
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public static int ByteLength (Array array)
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{
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// note: the other methods in this class also use ByteLength to test for
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// null and non-primitive arguments as a side-effect.
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if (array == null)
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throw new ArgumentNullException ("array");
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int length = ByteLengthInternal (array);
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if (length < 0)
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throw new ArgumentException (Locale.GetText ("Object must be an array of primitives."));
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return length;
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}
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public static byte GetByte (Array array, int index)
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{
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if (index < 0 || index >= ByteLength (array))
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throw new ArgumentOutOfRangeException ("index", Locale.GetText(
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"Value must be non-negative and less than the size of the collection."));
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return GetByteInternal (array, index);
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}
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public static void SetByte (Array array, int index, byte value)
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{
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if (index < 0 || index >= ByteLength (array))
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throw new ArgumentOutOfRangeException ("index", Locale.GetText(
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"Value must be non-negative and less than the size of the collection."));
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SetByteInternal (array, index, value);
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}
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public static void BlockCopy (Array src, int srcOffset, Array dst, int dstOffset, int count)
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{
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if (src == null)
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throw new ArgumentNullException ("src");
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if (dst == null)
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throw new ArgumentNullException ("dst");
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if (srcOffset < 0)
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throw new ArgumentOutOfRangeException ("srcOffset", Locale.GetText(
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"Non-negative number required."));
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if (dstOffset < 0)
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throw new ArgumentOutOfRangeException ("dstOffset", Locale.GetText (
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"Non-negative number required."));
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if (count < 0)
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throw new ArgumentOutOfRangeException ("count", Locale.GetText (
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"Non-negative number required."));
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// We do the checks in unmanaged code for performance reasons
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bool res = BlockCopyInternal (src, srcOffset, dst, dstOffset, count);
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if (!res) {
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// watch for integer overflow
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if ((srcOffset > ByteLength (src) - count) || (dstOffset > ByteLength (dst) - count))
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throw new ArgumentException (Locale.GetText (
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"Offset and length were out of bounds for the array or count is greater than " +
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"the number of elements from index to the end of the source collection."));
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}
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}
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// private
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[MethodImplAttribute (MethodImplOptions.InternalCall)]
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private extern static int ByteLengthInternal (Array array);
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[MethodImplAttribute (MethodImplOptions.InternalCall)]
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private extern static byte GetByteInternal (Array array, int index);
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[MethodImplAttribute (MethodImplOptions.InternalCall)]
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private extern static void SetByteInternal (Array array, int index, int value);
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[MethodImplAttribute (MethodImplOptions.InternalCall)]
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internal extern static bool BlockCopyInternal (Array src, int src_offset, Array dest, int dest_offset, int count);
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}
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}
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