From 5b2a99c548a6c9c90d4cc63cddca29af009c2479 Mon Sep 17 00:00:00 2001
From: Igor Pavlov <ipavlov@users.sourceforge.net>
Date: Sun, 30 Dec 2018 14:01:47 +0000
Subject: 18.06

---
 CPP/7zip/Archive/Zip/ZipHandler.cpp |  8 ++++++--
 CPP/7zip/Archive/Zip/ZipIn.cpp      | 21 +++++++++++++++++++++
 CPP/7zip/Archive/Zip/ZipIn.h        |  6 ++++++
 CPP/7zip/Archive/Zip/ZipItem.h      | 14 ++++++++++++--
 CPP/7zip/Archive/Zip/ZipUpdate.cpp  |  5 ++++-
 5 files changed, 49 insertions(+), 5 deletions(-)

(limited to 'CPP/7zip/Archive/Zip')

diff --git a/CPP/7zip/Archive/Zip/ZipHandler.cpp b/CPP/7zip/Archive/Zip/ZipHandler.cpp
index 494b9d70..a4794f51 100644
--- a/CPP/7zip/Archive/Zip/ZipHandler.cpp
+++ b/CPP/7zip/Archive/Zip/ZipHandler.cpp
@@ -599,8 +599,12 @@ STDMETHODIMP CHandler::GetProperty(UInt32 index, PROPID propID, PROPVARIANT *val
 
     case kpidHostOS:
     {
-      const Byte hostOS = item.GetHostOS();
-      TYPE_TO_PROP(kHostOS, hostOS, prop);
+      if (item.FromCentral)
+      {
+        // 18.06: now we use HostOS only from Central::MadeByVersion
+        const Byte hostOS = item.MadeByVersion.HostOS;
+        TYPE_TO_PROP(kHostOS, hostOS, prop);
+      }
       break;
     }
     
diff --git a/CPP/7zip/Archive/Zip/ZipIn.cpp b/CPP/7zip/Archive/Zip/ZipIn.cpp
index aa7184af..509753c2 100644
--- a/CPP/7zip/Archive/Zip/ZipIn.cpp
+++ b/CPP/7zip/Archive/Zip/ZipIn.cpp
@@ -155,6 +155,7 @@ void CInArchive::Close()
   HeadersError = false;
   HeadersWarning = false;
   ExtraMinorError = false;
+  
   UnexpectedEnd = false;
   LocalsWereRead = false;
   LocalsCenterMerged = false;
@@ -1729,6 +1730,9 @@ HRESULT CInArchive::FindCd(bool checkOffsetMode)
 HRESULT CInArchive::TryReadCd(CObjectVector<CItemEx> &items, const CCdInfo &cdInfo, UInt64 cdOffset, UInt64 cdSize)
 {
   items.Clear();
+  
+  // _startLocalFromCd_Disk = (UInt32)(Int32)-1;
+  // _startLocalFromCd_Offset = (UInt64)(Int64)-1;
 
   RINOK(SeekToVol(IsMultiVol ? cdInfo.CdDisk : -1, cdOffset));
 
@@ -1752,6 +1756,17 @@ HRESULT CInArchive::TryReadCd(CObjectVector<CItemEx> &items, const CCdInfo &cdIn
     {
       CItemEx cdItem;
       RINOK(ReadCdItem(cdItem));
+      
+      /*
+      if (cdItem.Disk < _startLocalFromCd_Disk ||
+          cdItem.Disk == _startLocalFromCd_Disk &&
+          cdItem.LocalHeaderPos < _startLocalFromCd_Offset)
+      {
+        _startLocalFromCd_Disk = cdItem.Disk;
+        _startLocalFromCd_Offset = cdItem.LocalHeaderPos;
+      }
+      */
+
       items.Add(cdItem);
     }
     if (Callback && (items.Size() & 0xFFF) == 0)
@@ -2509,6 +2524,8 @@ HRESULT CInArchive::ReadHeaders(CObjectVector<CItemEx> &items)
         {
           ArcInfo.CdWasRead = true;
           ArcInfo.FirstItemRelatOffset = items[0].LocalHeaderPos;
+
+          // ArcInfo.FirstItemRelatOffset = _startLocalFromCd_Offset;
         }
       }
     }
@@ -2535,6 +2552,10 @@ HRESULT CInArchive::ReadHeaders(CObjectVector<CItemEx> &items)
     items.Clear();
     localsWereRead = true;
     
+    HeadersError = false;
+    HeadersWarning = false;
+    ExtraMinorError = false;
+
     // we can use any mode: with buffer and without buffer
     //   without buffer : skips packed data : fast for big files : slow for small files
     //   with    buffer : reads packed data : slow for big files : fast for small files
diff --git a/CPP/7zip/Archive/Zip/ZipIn.h b/CPP/7zip/Archive/Zip/ZipIn.h
index 88f29569..f46f1f07 100644
--- a/CPP/7zip/Archive/Zip/ZipIn.h
+++ b/CPP/7zip/Archive/Zip/ZipIn.h
@@ -250,6 +250,9 @@ class CInArchive
   UInt64 _streamPos;
   UInt64 _cnt;
 
+  // UInt32 _startLocalFromCd_Disk;
+  // UInt64 _startLocalFromCd_Offset;
+
   size_t GetAvail() const { return _bufCached - _bufPos; }
 
   void InitBuf() { _bufPos = 0; _bufCached = 0; }
@@ -383,6 +386,9 @@ public:
 
   UInt64 GetEmbeddedStubSize() const
   {
+    // it's possible that first item in CD doesn refers to first local item
+    // so FirstItemRelatOffset is not first local item
+
     if (ArcInfo.CdWasRead)
       return ArcInfo.FirstItemRelatOffset;
     if (IsMultiVol)
diff --git a/CPP/7zip/Archive/Zip/ZipItem.h b/CPP/7zip/Archive/Zip/ZipItem.h
index 78e3e01c..e5769711 100644
--- a/CPP/7zip/Archive/Zip/ZipItem.h
+++ b/CPP/7zip/Archive/Zip/ZipItem.h
@@ -214,6 +214,12 @@ class CLocalItem
 public:
   UInt16 Flags;
   UInt16 Method;
+  
+  /*
+    Zip specification doesn't mention that ExtractVersion field uses HostOS subfield.
+    18.06: 7-Zip now doesn't use ExtractVersion::HostOS to detect codePage
+  */
+
   CVersion ExtractVersion;
 
   UInt64 Size;
@@ -309,7 +315,8 @@ public:
   UInt32 GetWinAttrib() const;
   bool GetPosixAttrib(UInt32 &attrib) const;
 
-  Byte GetHostOS() const { return FromCentral ? MadeByVersion.HostOS : ExtractVersion.HostOS; }
+  // 18.06: 0 instead of ExtractVersion.HostOS for local item
+  Byte GetHostOS() const { return FromCentral ? MadeByVersion.HostOS : (Byte)0; }
 
   void GetUnicodeString(UString &res, const AString &s, bool isComment, bool useSpecifiedCodePage, UINT codePage) const;
 
@@ -326,7 +333,10 @@ public:
   
   UINT GetCodePage() const
   {
-    Byte hostOS = GetHostOS();
+    // 18.06: now we use HostOS only from Central::MadeByVersion
+    if (!FromCentral)
+      return CP_OEMCP;
+    Byte hostOS = MadeByVersion.HostOS;
     return (UINT)((
            hostOS == NFileHeader::NHostOS::kFAT
         || hostOS == NFileHeader::NHostOS::kNTFS
diff --git a/CPP/7zip/Archive/Zip/ZipUpdate.cpp b/CPP/7zip/Archive/Zip/ZipUpdate.cpp
index 2289203b..e65c2b8b 100644
--- a/CPP/7zip/Archive/Zip/ZipUpdate.cpp
+++ b/CPP/7zip/Archive/Zip/ZipUpdate.cpp
@@ -40,7 +40,10 @@ static const Byte kHostOS =
   #endif
 
 static const Byte kMadeByHostOS = kHostOS;
-static const Byte kExtractHostOS = kHostOS;
+
+// 18.06: now we always write zero to high byte of ExtractVersion field.
+// Previous versions of p7zip wrote (NFileHeader::NHostOS::kUnix) there, that is not correct
+static const Byte kExtractHostOS = 0;
 
 static const Byte kMethodForDirectory = NFileHeader::NCompressionMethod::kStore;
 
-- 
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