Changes between Version 66 and Version 67 of HashSourceCodes

Timestamp:

Jan 5, 2017, 10:11:09 AM (7 years ago)

Author:

os

Comment:

--

HashSourceCodes

@@ -1969 +1969 @@
 }}}
 
+== SWIFT 3 ==
+Source codes: https://github.com/niklasberglund/OpenSubtitlesHash.swift
+{{{
+//
+//  This Swift 3 version is based on Swift 2 version by eduo:
+//  https://gist.github.com/eduo/7188bb0029f3bcbf03d4
+//
+//  Created by Niklas Berglund on 2017-01-01.
+//
+import Foundation
+
+class OpenSubtitlesHash: NSObject {
+    static let chunkSize: Int = 65536
+    
+    struct VideoHash {
+        var fileHash: String
+        var fileSize: UInt64
+    }
+    
+    public class func hashFor(_ url: URL) -> VideoHash {
+        return self.hashFor(url.path)
+    }
+    
+    public class func hashFor(_ path: String) -> VideoHash {
+        var fileHash = VideoHash(fileHash: "", fileSize: 0)
+        let fileHandler = FileHandle(forReadingAtPath: path)!
+        
+        let fileDataBegin: NSData = fileHandler.readData(ofLength: chunkSize) as NSData
+        fileHandler.seekToEndOfFile()
+        
+        let fileSize: UInt64 = fileHandler.offsetInFile
+        if (UInt64(chunkSize) > fileSize) {
+            return fileHash
+        }
+        
+        fileHandler.seek(toFileOffset: max(0, fileSize - UInt64(chunkSize)))
+        let fileDataEnd: NSData = fileHandler.readData(ofLength: chunkSize) as NSData
+        
+        var hash: UInt64 = fileSize
+        
+        var data_bytes = UnsafeBufferPointer<UInt64>(
+            start: UnsafePointer(fileDataBegin.bytes.assumingMemoryBound(to: UInt64.self)),
+            count: fileDataBegin.length/MemoryLayout<UInt64>.size
+        )
+        
+        hash = data_bytes.reduce(hash,&+)
+        
+        data_bytes = UnsafeBufferPointer<UInt64>(
+            start: UnsafePointer(fileDataEnd.bytes.assumingMemoryBound(to: UInt64.self)),
+            count: fileDataEnd.length/MemoryLayout<UInt64>.size
+        )
+        
+        hash = data_bytes.reduce(hash,&+)
+        
+        fileHash.fileHash = String(format:"%016qx", arguments: [hash])
+        fileHash.fileSize = fileSize
+        
+        fileHandler.closeFile()
+        
+        return fileHash
+    }
+}
+
+// Usage example:
+// let videoUrl = Bundle.main.url(forResource: "dummy5", withExtension: "rar")
+// let videoHash = OpenSubtitlesHash.hashFor(videoUrl!)
+// debugPrint("File hash: \(videoHash.fileHash)\nFile size: \(videoHash.fileSize)")
+
+}}}
+
 
 == RUST ==