Zip progress

Zip/ZipHelpers.swift

+//
+//  ZipHelpers.swift
+//  Zip
+//
+//  Created by Roy Marmelstein on 12/01/2016.
+//  Copyright © 2016 Roy Marmelstein. All rights reserved.
+//
+
+import Foundation
+
+public enum FopenMode: String {
+    case Read = "r"
+    case Write = "w"
+}
+
+public func ZIPFopen(path: String..., mode: FopenMode = .Read) throws -> UnsafeMutablePointer<FILE> {
+    let path = joinPathComponents(path)
+    let f = fopen(path, mode.rawValue)
+    guard f != nil else { throw ZipError.FileError }
+    return f
+}
+
+/**
+ Joins path components, unless a component is an absolute
+ path, in which case it discards all previous path components.
+ */
+func joinPathComponents(join: [String]) -> String {
+    guard join.count > 0 else { return "" }
+    
+    return join.dropFirst(1).reduce(join[0]) {
+        if $1.hasPrefix("/") {
+            return $1
+        } else {
+            return $0 + "/" + $1
+        }
+    }
+}
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