Changes between Version 63 and Version 64 of HashSourceCodes

Timestamp:

Jun 17, 2015, 8:30:55 AM (9 years ago)

Author:

os

Comment:

--

HashSourceCodes

@@ -1906 +1906 @@
     }
 }}}
+
+== SWIFT 2 ==
+{{{
+//  OSHash.swift
+//  Originally implemented from Objective-C version for Swift by omerucel 18/04/2015
+// http://trac.opensubtitles.org/projects/opensubtitles/wiki/HashSourceCodes#Objective-C
+//  Updated for Swift 2 by eduo on  15/06/15.
+//  Copyright © 2015 Eduardo Gutierrez. All rights reserved.
+//
+
+import Foundation
+
+class OSHashAlgorithm: NSObject {
+    let chunkSize: Int = 65536;
+    
+    struct VideoHash {
+        var fileHash: String
+        var fileSize: UInt64
+    }
+    
+    func hashForPath (path: String) -> VideoHash {
+        var fileHash = VideoHash(fileHash: "", fileSize: 0)
+        let fileHandler = NSFileHandle(forReadingAtPath: path)!
+        
+        let fileDataBegin: NSData = fileHandler.readDataOfLength(chunkSize)
+        fileHandler.seekToEndOfFile()
+        
+        let fileSize: UInt64 = fileHandler.offsetInFile
+        if (UInt64(chunkSize) > fileSize) {
+            return fileHash
+        }
+        
+        fileHandler.seekToFileOffset(max(0, fileSize - UInt64(chunkSize)))
+        let fileDataEnd: NSData = fileHandler.readDataOfLength(chunkSize)
+        
+        var hash: UInt64 = fileSize
+        
+        var data_bytes = UnsafeBufferPointer<UInt64>(
+            start: UnsafePointer(fileDataBegin.bytes),
+            count: fileDataBegin.length/sizeof(UInt64)
+        )
+        hash = data_bytes.reduce(hash,combine: &+)
+        
+        data_bytes = UnsafeBufferPointer<UInt64>(
+            start: UnsafePointer(fileDataEnd.bytes),
+            count: fileDataEnd.length/sizeof(UInt64)
+        )
+        hash = data_bytes.reduce(hash,combine: &+)
+        
+        fileHash.fileHash = String(format:"%qx", arguments: [hash])
+        fileHash.fileSize = fileSize
+        
+        fileHandler.closeFile()
+        return fileHash
+    }
+}
+
+///var osha = OSHashAlgorithm()
+///var result = osha.hashForPath(fileName)
+///println(result.fileHash)
+///println(result.fileSize)
+}}}