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(FormatCatalog.FindFormats): new generic method.

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morkt
2016-12-17 18:51:33 +04:00
parent 7c989a0150
commit f3e3446c9a
4 changed files with 69 additions and 77 deletions
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50
GameRes/ArcFile.cs
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@@ -71,48 +71,32 @@ namespace GameRes
{
if (entry.Size < 4)
return null;
var filename = entry.Name;
var ext = new Lazy<string> (() => Path.GetExtension (filename).TrimStart ('.').ToLowerInvariant(), false);
var file = VFS.OpenView (entry);
try
{
uint signature = file.View.ReadUInt32 (0);
var tried = Enumerable.Empty<ArchiveFormat>();
for (;;)
foreach (var impl in FormatCatalog.Instance.FindFormats<ArchiveFormat> (entry.Name, signature))
{
var range = FormatCatalog.Instance.LookupSignature<ArchiveFormat> (signature);
if (tried.Any())
range = range.Except (tried);
// check formats that match filename extension first
if (range.Skip(1).Any()) // if range.Count() > 1
range = range.OrderByDescending (f => f.Extensions.Any (e => e == ext.Value));
foreach (var impl in range)
try
{
try
var arc = impl.TryOpen (file);
if (null != arc)
{
var arc = impl.TryOpen (file);
if (null != arc)
{
file = null; // file ownership passed to ArcFile
return arc;
}
}
catch (OperationCanceledException X)
{
FormatCatalog.Instance.LastError = X;
return null;
}
catch (Exception X)
{
// ignore failed open attmepts
Trace.WriteLine (string.Format ("[{0}] {1}: {2}", impl.Tag, filename, X.Message));
FormatCatalog.Instance.LastError = X;
file = null; // file ownership passed to ArcFile
return arc;
}
}
if (0 == signature)
break;
signature = 0;
tried = range;
catch (OperationCanceledException X)
{
FormatCatalog.Instance.LastError = X;
return null;
}
catch (Exception X)
{
// ignore failed open attmepts
Trace.WriteLine (string.Format ("[{0}] {1}: {2}", impl.Tag, entry.Name, X.Message));
FormatCatalog.Instance.LastError = X;
}
}
}
finally