From 3503bcbb89f87e5a3f7270ea2c26795eb0f03e62 Mon Sep 17 00:00:00 2001
From: Timofey Solomko <tsolomko@gmail.com>
Date: Sun, 30 Jul 2017 15:52:28 +0300
Subject: [PATCH] Support unavailable data in SevenZipEntry (when no
 substreamInfo is found)

---
 Sources/7zEntry.swift | 16 +++++++++++-----
 Sources/7zError.swift |  1 +
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/Sources/7zEntry.swift b/Sources/7zEntry.swift
index 6436b749..1ea89ba4 100644
--- a/Sources/7zEntry.swift
+++ b/Sources/7zEntry.swift
@@ -23,17 +23,23 @@ public class SevenZipEntry: ContainerEntry {
 
     public var entryAttributes: [FileAttributeKey: Any]
 
-    private let dataObject: Data
+    public let dataIsAvailable: Bool
 
-    init(_ entryInfo: SevenZipEntryInfo, _ data: Data) {
-        // TODO: Make data decoding here?
+    private let dataObject: Data?
+
+    init(_ entryInfo: SevenZipEntryInfo, _ data: Data?) {
         self.info = entryInfo
         self.dataObject = data
+        self.dataIsAvailable = data != nil
         self.entryAttributes = [:]
     }
 
-    public func data() -> Data {
-        return dataObject
+    public func data() throws -> Data {
+        if let data = dataObject {
+            return data
+        } else {
+            throw SevenZipError.dataIsUnavailable
+        }
     }
 
 }
diff --git a/Sources/7zError.swift b/Sources/7zError.swift
index 129b2480..70bd936e 100644
--- a/Sources/7zError.swift
+++ b/Sources/7zError.swift
@@ -38,4 +38,5 @@ public enum SevenZipError: Error {
     case noStreamFound
     case noPackInfoFound
     case streamOverread
+    case dataIsUnavailable
 }