5 // Paolo Molaro (lupus@ximian.com)
6 // Dan Lewis (dihlewis@yahoo.co.uk)
8 // (C) 2001 Ximian, Inc. http://www.ximian.com
12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
14 // Permission is hereby granted, free of charge, to any person obtaining
15 // a copy of this software and associated documentation files (the
16 // "Software"), to deal in the Software without restriction, including
17 // without limitation the rights to use, copy, modify, merge, publish,
18 // distribute, sublicense, and/or sell copies of the Software, and to
19 // permit persons to whom the Software is furnished to do so, subject to
20 // the following conditions:
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
34 using System.Runtime.CompilerServices;
38 public sealed class Buffer
44 public static int ByteLength (Array array)
46 // note: the other methods in this class also use ByteLength to test for
47 // null and non-primitive arguments as a side-effect.
50 throw new ArgumentNullException ("array");
52 int length = ByteLengthInternal (array);
54 throw new ArgumentException (Locale.GetText ("Object must be an array of primitives."));
59 public static byte GetByte (Array array, int index)
61 if (index < 0 || index >= ByteLength (array))
62 throw new ArgumentOutOfRangeException ("index", Locale.GetText(
63 "Value must be non-negative and less than the size of the collection."));
65 return GetByteInternal (array, index);
68 public static void SetByte (Array array, int index, byte value)
70 if (index < 0 || index >= ByteLength (array))
71 throw new ArgumentOutOfRangeException ("index", Locale.GetText(
72 "Value must be non-negative and less than the size of the collection."));
74 SetByteInternal (array, index, value);
77 public static void BlockCopy (Array src, int srcOffset, Array dest, int destOffset, int count)
80 throw new ArgumentNullException ("src");
83 throw new ArgumentNullException ("dest");
86 throw new ArgumentOutOfRangeException ("srcOffset", Locale.GetText(
87 "Non-negative number required."));
90 throw new ArgumentOutOfRangeException ("destOffset", Locale.GetText (
91 "Non-negative number required."));
94 throw new ArgumentOutOfRangeException ("count", Locale.GetText (
95 "Non-negative number required."));
97 // We do the checks in unmanaged code for performance reasons
98 bool res = BlockCopyInternal (src, srcOffset, dest, destOffset, count);
100 // watch for integer overflow
101 if ((srcOffset > ByteLength (src) - count) || (destOffset > ByteLength (dest) - count))
102 throw new ArgumentException (Locale.GetText (
103 "Offset and length were out of bounds for the array or count is greater than" +
104 "the number of elements from index to the end of the source collection."));
109 [MethodImplAttribute (MethodImplOptions.InternalCall)]
110 private extern static int ByteLengthInternal (Array array);
112 [MethodImplAttribute (MethodImplOptions.InternalCall)]
113 private extern static byte GetByteInternal (Array array, int index);
115 [MethodImplAttribute (MethodImplOptions.InternalCall)]
116 private extern static void SetByteInternal (Array array, int index, int value);
118 [MethodImplAttribute (MethodImplOptions.InternalCall)]
119 internal extern static bool BlockCopyInternal (Array src, int src_offset, Array dest, int dest_offset, int count);