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(TryOpen): use lazy evaluation for filename extension check.

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This commit is contained in:
morkt 2014-07-29 15:30:23 +04:00
parent 5d876b69bc
commit f15676d0a1
1 changed files with 4 additions and 2 deletions
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6
GameRes/ArcFile.cs
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@ -64,8 +64,8 @@ namespace GameRes
/// </returns>
public static ArcFile TryOpen (string filename)
{
var ext = new Lazy<string> (() => Path.GetExtension (filename).TrimStart ('.').ToLower());
var file = new ArcView (filename);
string ext = Path.GetExtension (filename).TrimStart ('.').ToLower();
try
{
uint signature = file.View.ReadUInt32 (0);
@ -73,7 +73,9 @@ namespace GameRes
{
var range = FormatCatalog.Instance.LookupSignature<ArchiveFormat> (signature);
// check formats that match filename extension first
foreach (var impl in range.OrderByDescending (f => f.Extensions.First() == ext))
if (range.Skip(1).Any()) // if range.Count() > 1
range = range.OrderByDescending (f => f.Extensions.First() == ext.Value);
foreach (var impl in range)
{
try
{