From 851b6a097165af4d51c0db01b5e05256e5006896 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 11:00:48 +0200
Subject: Adding upstream version 2.6.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 ftparchive/cachedb.h | 195 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 195 insertions(+)
 create mode 100644 ftparchive/cachedb.h

(limited to 'ftparchive/cachedb.h')

diff --git a/ftparchive/cachedb.h b/ftparchive/cachedb.h
new file mode 100644
index 0000000..399e1f1
--- /dev/null
+++ b/ftparchive/cachedb.h
@@ -0,0 +1,195 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   CacheDB
+   
+   Simple uniform interface to a cache database.
+   
+   ##################################################################### */
+									/*}}}*/
+#ifndef CACHEDB_H
+#define CACHEDB_H
+
+#include <apt-pkg/debfile.h>
+#include <apt-pkg/hashes.h>
+
+#include <db.h>
+#include <string>
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "contents.h"
+#include "sources.h"
+
+class FileFd;
+
+
+class CacheDB
+{
+   protected:
+      
+   // Database state/access
+   DBT Key;
+   DBT Data;
+   char TmpKey[600];
+   DB *Dbp;
+   bool DBLoaded;
+   bool ReadOnly;
+   std::string DBFile;
+
+   // Generate a key for the DB of a given type
+   void _InitQuery(const char *Type)
+   {
+      memset(&Key,0,sizeof(Key));
+      memset(&Data,0,sizeof(Data));
+      Key.data = TmpKey;
+      Key.size = snprintf(TmpKey,sizeof(TmpKey),"%s:%s",FileName.c_str(), Type);
+   }
+   
+   void InitQueryStats() {
+      _InitQuery("st");
+   }
+   void InitQuerySource() {
+      _InitQuery("cs");
+   }
+   void InitQueryControl() {
+      _InitQuery("cl");
+   }
+   void InitQueryContent() {
+      _InitQuery("cn");
+   }
+
+   inline bool Get() 
+   {
+      return Dbp->get(Dbp,0,&Key,&Data,0) == 0;
+   };
+   inline bool Put(const void *In,unsigned long const &Length) 
+   {
+      if (ReadOnly == true)
+	 return true;
+      Data.size = Length;
+      Data.data = (void *)In;
+      if (DBLoaded == true && (errno = Dbp->put(Dbp,0,&Key,&Data,0)) != 0)
+      {
+	 DBLoaded = false;
+	 return false;
+      }
+      return true;
+   }
+   bool OpenFile();
+   void CloseFile();
+
+   bool OpenDebFile();
+   void CloseDebFile();
+
+   // GetCurStat needs some compat code, see lp #1274466)
+   bool GetCurStatCompatOldFormat();
+   bool GetCurStatCompatNewFormat();
+   bool GetCurStat();
+
+   bool GetFileStat(bool const &doStat = false);
+   bool LoadControl();
+   bool LoadContents(bool const &GenOnly);
+   bool LoadSource();
+   bool GetHashes(bool const GenOnly, unsigned int const DoHashes);
+
+   // Stat info stored in the DB, Fixed types since it is written to disk.
+   enum FlagList {FlControl = (1<<0),FlMD5=(1<<1),FlContents=(1<<2),
+                  FlSize=(1<<3), FlSHA1=(1<<4), FlSHA256=(1<<5),
+                  FlSHA512=(1<<6), FlSource=(1<<7)
+   };
+
+   // the on-disk format changed (FileSize increased to 64bit) in 
+   // commit 650faab0 which will lead to corruption with old caches
+   struct StatStoreOldFormat
+   {
+      uint32_t Flags;
+      uint32_t mtime;
+      uint32_t FileSize;
+      uint8_t  MD5[16];
+      uint8_t  SHA1[20];
+      uint8_t  SHA256[32];
+   } CurStatOldFormat;
+
+   // WARNING: this struct is read/written to the DB so do not change the
+   //          layout of the fields (see lp #1274466), only append to it
+   struct StatStore
+   {
+      uint32_t Flags;
+      uint32_t mtime;          
+      uint64_t FileSize;
+      uint8_t  MD5[16];
+      uint8_t  SHA1[20];
+      uint8_t  SHA256[32];
+      uint8_t  SHA512[64];
+   } CurStat;
+   struct StatStore OldStat;
+   
+   // 'set' state
+   std::string FileName;
+   FileFd *Fd;
+   debDebFile *DebFile;
+   
+   public:
+
+   // Data collection helpers
+   debDebFile::MemControlExtract Control;
+   ContentsExtract Contents;
+   DscExtract Dsc;
+   HashStringList HashesList;
+
+   // Runtime statistics
+   struct Stats
+   {
+      double Bytes;
+      double MD5Bytes;
+      double SHA1Bytes;
+      double SHA256Bytes;
+      double SHA512Bytes;
+      unsigned long Packages;
+      unsigned long Misses;  
+      unsigned long long DeLinkBytes;
+      
+      inline void Add(const Stats &S) {
+	 Bytes += S.Bytes; 
+         MD5Bytes += S.MD5Bytes; 
+         SHA1Bytes += S.SHA1Bytes; 
+	 SHA256Bytes += S.SHA256Bytes;
+	 SHA512Bytes += S.SHA512Bytes;
+	 Packages += S.Packages;
+         Misses += S.Misses; 
+         DeLinkBytes += S.DeLinkBytes;
+      };
+      Stats() : Bytes(0), MD5Bytes(0), SHA1Bytes(0), SHA256Bytes(0),
+		SHA512Bytes(0),Packages(0), Misses(0), DeLinkBytes(0) {};
+   } Stats;
+   
+   bool ReadyDB(std::string const &DB = "");
+   inline bool DBFailed() {return Dbp != 0 && DBLoaded == false;};
+   inline bool Loaded() {return DBLoaded == true;};
+   
+   inline unsigned long long GetFileSize(void) {return CurStat.FileSize;}
+   
+   bool SetFile(std::string const &FileName,struct stat St,FileFd *Fd);
+
+   // terrible old overloaded interface
+   bool GetFileInfo(std::string const &FileName,
+	 bool const &DoControl,
+	 bool const &DoContents,
+	 bool const &GenContentsOnly,
+	 bool const DoSource,
+	 unsigned int const DoHashes,
+	 bool const &checkMtime = false);
+
+   bool Finish();   
+   
+   bool Clean();
+   
+   explicit CacheDB(std::string const &DB);
+   ~CacheDB();
+};
+    
+#endif
-- 
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