2 // MdocFile.cs: File utility methods
5 // Jonathan Pryor <jpryor@novell.com>
7 // Copyright (c) 2010 Novell, Inc. (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 namespace Mono.Documentation {
34 static class MdocFile {
36 public static void UpdateFile (string file, Action<string> creator)
38 if (!File.Exists (file) || file == "-") {
43 string temp = Path.GetTempFileName ();
48 using (var a = File.OpenRead (file))
49 using (var b = File.OpenRead (temp)) {
50 if (a.Length == b.Length)
51 move = !FileContentsIdentical (a, b);
56 File.Move (temp, file);
60 if (!move && File.Exists (temp))
65 static bool FileContentsIdentical (Stream a, Stream b)
67 byte[] ba = new byte[4096];
68 byte[] bb = new byte[4096];
71 while ((ra = a.Read (ba, 0, ba.Length)) > 0 &&
72 (rb = b.Read (bb, 0, bb.Length)) > 0) {
75 for (int i = 0; i < ra; ++i) {