implement CopyFile without using FileFd::Size()

[apt.git] / ftparchive / cachedb.cc

diff --git a/ftparchive/cachedb.cc b/ftparchive/cachedb.cc
index be54ea62c1128ec83cc4d547c142a1b50922418d..ce6c865f334f9a9613717edebce81cf99891a4f1 100644 (file)
--- a/ftparchive/cachedb.cc
+++ b/ftparchive/cachedb.cc
@@ -34,6 +34,20 @@
 #include <apti18n.h>
                                                                        /*}}}*/
 
+CacheDB::CacheDB(std::string const &DB)
+   : Dbp(0), Fd(NULL), DebFile(0)
+{
+   TmpKey[0]='\0';
+   ReadyDB(DB);
+}
+
+CacheDB::~CacheDB()
+{
+   ReadyDB();
+   delete DebFile;
+   CloseFile();
+}
+
 // CacheDB::ReadyDB - Ready the DB2                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* This opens the DB2 file for caching package information */
@@ -88,7 +102,7 @@ bool CacheDB::ReadyDB(std::string const &DB)
           return _error->Error(_("Unable to open DB file %s: %s"),DB.c_str(), db_strerror(err));
       }
    }
-   
+
    DBFile = DB;
    DBLoaded = true;
    return true;
@@ -174,6 +188,45 @@ bool CacheDB::GetFileStat(bool const &doStat)
    CurStat.mtime = htonl(St.st_mtime);
    CurStat.Flags |= FlSize;
    
+   return true;
+}
+                                                                       /*}}}*/
+// CacheDB::GetCurStatCompatOldFormat                                  /*{{{*/
+// ---------------------------------------------------------------------
+/* Read the old (32bit FileSize) StateStore format from disk */
+bool CacheDB::GetCurStatCompatOldFormat()
+{
+   InitQueryStats();
+   Data.data = &CurStatOldFormat;
+   Data.flags = DB_DBT_USERMEM;
+   Data.ulen = sizeof(CurStatOldFormat);
+   if (Get() == false)
+   {
+      CurStat.Flags = 0;
+   } else {
+      CurStat.Flags = CurStatOldFormat.Flags;
+      CurStat.mtime = CurStatOldFormat.mtime;
+      CurStat.FileSize = CurStatOldFormat.FileSize;
+      memcpy(CurStat.MD5, CurStatOldFormat.MD5, sizeof(CurStat.MD5));
+      memcpy(CurStat.SHA1, CurStatOldFormat.SHA1, sizeof(CurStat.SHA1));
+      memcpy(CurStat.SHA256, CurStatOldFormat.SHA256, sizeof(CurStat.SHA256));
+   }
+   return true;
+}
+                                                                       /*}}}*/
+// CacheDB::GetCurStatCompatOldFormat                                  /*{{{*/
+// ---------------------------------------------------------------------
+/* Read the new (64bit FileSize) StateStore format from disk */
+bool CacheDB::GetCurStatCompatNewFormat()
+{
+   InitQueryStats();
+   Data.data = &CurStat;
+   Data.flags = DB_DBT_USERMEM;
+   Data.ulen = sizeof(CurStat);
+   if (Get() == false)
+   {
+      CurStat.Flags = 0;
+   }
    return true;
 }
                                                                        /*}}}*/
@@ -187,19 +240,29 @@ bool CacheDB::GetCurStat()
    
    if (DBLoaded)
    {
-      /* First see if there is anything about it
-         in the database */
-      
-      /* Get the flags (and mtime) */
+      // do a first query to just get the size of the data on disk
       InitQueryStats();
-      // Ensure alignment of the returned structure
       Data.data = &CurStat;
-      Data.ulen = sizeof(CurStat);
       Data.flags = DB_DBT_USERMEM;
-      if (Get() == false)
+      Data.ulen = 0;
+      Get();
+
+      if (Data.size == 0)
+      {
+         // nothing needs to be done, we just have not data for this deb
+      }
+      // check if the record is written in the old format (32bit filesize)
+      else if(Data.size == sizeof(CurStatOldFormat))
+      {
+         GetCurStatCompatOldFormat();
+      }
+      else if(Data.size == sizeof(CurStat))
       {
-        CurStat.Flags = 0;
-      }      
+         GetCurStatCompatNewFormat();
+      } else {
+         return _error->Error("Cache record size mismatch (%ul)", Data.size);
+      }
+
       CurStat.Flags = ntohl(CurStat.Flags);
       CurStat.FileSize = ntohl(CurStat.FileSize);
    }      
@@ -260,12 +323,12 @@ bool CacheDB::LoadSource()                                                /*{{{*/
    if (Dsc.Read(FileName) == false)
       return false;
 
-   if (Dsc.Data == 0)
+   if (Dsc.Length == 0)
       return _error->Error(_("Failed to read .dsc"));
-   
+
    // Write back the control information
    InitQuerySource();
-   if (Put(Dsc.Data, Dsc.Length) == true)
+   if (Put(Dsc.Data.c_str(), Dsc.Length) == true)
       CurStat.Flags |= FlSource;
 
    return true;
@@ -379,8 +442,8 @@ bool CacheDB::GetHashes(bool const GenOnly, unsigned int const DoHashes)
       if (OpenFile() == false)
         return false;
 
-      Hashes hashes;
-      if (Fd->Seek(0) == false || hashes.AddFD(*Fd, CurStat.FileSize, FlHashes) == false)
+      Hashes hashes(FlHashes);
+      if (Fd->Seek(0) == false || hashes.AddFD(*Fd, CurStat.FileSize) == false)
         return false;
 
       HashStringList hl = hashes.GetHashStringList();
@@ -411,6 +474,10 @@ bool CacheDB::GetHashes(bool const GenOnly, unsigned int const DoHashes)
            hex2bytes(CurStat.MD5, hs->HashValue().data(), sizeof(CurStat.MD5));
            CurStat.Flags |= FlMD5;
         }
+        else if (strcasecmp(hs->HashType().c_str(), "Checksum-FileSize") == 0)
+        {
+           // we store it in a different field already
+        }
         else
            return _error->Error("Got unknown unrequested hashtype %s", hs->HashType().c_str());
       }