From 76e2632459410dec81337edb6a9fee33c9a660f3 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 13 Apr 2024 11:59:37 +0200
Subject: Adding upstream version 2.7.12.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 apt-pkg/contrib/arfile.cc | 179 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)
 create mode 100644 apt-pkg/contrib/arfile.cc

(limited to 'apt-pkg/contrib/arfile.cc')

diff --git a/apt-pkg/contrib/arfile.cc b/apt-pkg/contrib/arfile.cc
new file mode 100644
index 0000000..dfc380b
--- /dev/null
+++ b/apt-pkg/contrib/arfile.cc
@@ -0,0 +1,179 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   AR File - Handle an 'AR' archive
+   
+   AR Archives have plain text headers at the start of each file
+   section. The headers are aligned on a 2 byte boundary.
+   
+   Information about the structure of AR files can be found in ar(5)
+   on a BSD system, or in the binutils source.
+
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/arfile.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/strutl.h>
+
+#include <cstring>
+#include <string>
+#include <sys/types.h>
+
+#include <apti18n.h>
+									/*}}}*/
+
+struct ARArchive::MemberHeader
+{
+   char Name[16];
+   char MTime[12];
+   char UID[6];
+   char GID[6];
+   char Mode[8];
+   char Size[10];
+   char Magic[2];
+};
+
+// ARArchive::ARArchive - Constructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+ARArchive::ARArchive(FileFd &File) : List(0), File(File)
+{
+   LoadHeaders();
+}
+									/*}}}*/
+// ARArchive::~ARArchive - Destructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+ARArchive::~ARArchive()
+{
+   while (List != 0)
+   {
+      Member *Tmp = List;
+      List = List->Next;
+      delete Tmp;
+   }   
+}
+									/*}}}*/
+// ARArchive::LoadHeaders - Load the headers from each file		/*{{{*/
+// ---------------------------------------------------------------------
+/* AR files are structured with a 8 byte magic string followed by a 60
+   byte plain text header then the file data, another header, data, etc */
+bool ARArchive::LoadHeaders()
+{
+   off_t Left = File.Size();
+   
+   // Check the magic byte
+   char Magic[8];
+   if (File.Read(Magic,sizeof(Magic)) == false)
+      return false;
+   if (memcmp(Magic,"!<arch>\012",sizeof(Magic)) != 0)
+      return _error->Error(_("Invalid archive signature"));
+   Left -= sizeof(Magic);
+   
+   // Read the member list
+   while (Left > 0)
+   {
+      MemberHeader Head;
+      if (File.Read(&Head,sizeof(Head)) == false)
+	 return _error->Error(_("Error reading archive member header"));
+      Left -= sizeof(Head);
+
+      // Convert all of the integer members
+      Member *Memb = new Member();
+      if (StrToNum(Head.MTime,Memb->MTime,sizeof(Head.MTime)) == false ||
+	  StrToNum(Head.UID,Memb->UID,sizeof(Head.UID)) == false ||
+	  StrToNum(Head.GID,Memb->GID,sizeof(Head.GID)) == false ||
+	  StrToNum(Head.Mode,Memb->Mode,sizeof(Head.Mode),8) == false ||
+	  StrToNum(Head.Size,Memb->Size,sizeof(Head.Size)) == false)
+      {
+	 delete Memb;
+	 return _error->Error(_("Invalid archive member header"));
+      }
+
+      if (Left < 0 || Memb->Size > static_cast<unsigned long long>(Left))
+      {
+	 delete Memb;
+	 return _error->Error(_("Invalid archive member header"));
+      }
+      // Check for an extra long name string
+      if (memcmp(Head.Name,"#1/",3) == 0)
+      {
+	 char S[300];
+	 unsigned long Len;
+	 if (StrToNum(Head.Name+3,Len,sizeof(Head.Size)-3) == false ||
+	     Len >= sizeof(S))
+	 {
+	    delete Memb;
+	    return _error->Error(_("Invalid archive member header"));
+	 }
+
+	 if (Len > Memb->Size)
+	 {
+	    delete Memb;
+	    return _error->Error(_("Invalid archive member header"));
+	 }
+
+	 if (File.Read(S,Len) == false)
+	 {
+	    delete Memb;
+	    return false;
+	 }
+	 S[Len] = 0;
+	 Memb->Name = S;
+	 Memb->Size -= Len;
+	 Left -= Len;
+      }
+      else
+      {
+	 unsigned int I = sizeof(Head.Name) - 1;
+	 for (; Head.Name[I] == ' ' || Head.Name[I] == '/'; I--)
+	 {
+	    if (I == 0)
+	    {
+	       delete Memb;
+	       return _error->Error(_("Invalid archive member header"));
+	    }
+	 }
+	 Memb->Name = std::string(Head.Name,I+1);
+      }
+
+      // Account for the AR header alignment 
+      off_t Skip = Memb->Size % 2;
+      
+      // Add it to the list
+      Memb->Next = List;
+      List = Memb;
+      Memb->Start = File.Tell();
+      if (File.Skip(Memb->Size + Skip) == false)
+	 return false;
+      if (Left < (off_t)(Memb->Size + Skip))
+	 return _error->Error(_("Archive is too short"));
+      Left -= Memb->Size + Skip;
+   }   
+   if (Left != 0)
+      return _error->Error(_("Failed to read the archive headers"));
+   
+   return true;
+}
+									/*}}}*/
+// ARArchive::FindMember - Find a name in the member list		/*{{{*/
+// ---------------------------------------------------------------------
+/* Find a member with the given name */
+const ARArchive::Member *ARArchive::FindMember(const char *Name) const
+{
+   const Member *Res = List;
+   while (Res != 0)
+   {
+      if (Res->Name == Name)
+	 return Res;
+      Res = Res->Next;
+   }
+   
+   return 0;
+}
+									/*}}}*/
-- 
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