1 files changed, 64 insertions, 20 deletions

diff --git a/apt-pkg/contrib/hashes.h b/apt-pkg/contrib/hashes.h
index 490282209..caeba006d 100644
--- a/apt-pkg/contrib/hashes.h
+++ b/apt-pkg/contrib/hashes.h
@@ -114,6 +114,15 @@ class HashStringList
     */
    bool empty() const { return list.empty(); }
 
+   /** has the list at least one good entry
+    *
+    * similar to #empty, but handles forced hashes.
+    *
+    * @return if no hash is forced, same result as #empty,
+    * if one is forced \b true if this has is available, \b false otherwise
+    */
+   bool usable() const;
+
    typedef std::vector<HashString>::const_iterator const_iterator;
 
    /** iterator to the first element */
@@ -128,8 +137,10 @@ class HashStringList
    /** compare two HashStringList for similarity.
     *
     * Two lists are similar if at least one hashtype is in both lists
-    * and the hashsum matches. All hashes are checked, if one doesn't
-    * match false is returned regardless of how many matched before.
+    * and the hashsum matches. All hashes are checked by default,
+    * if one doesn't match false is returned regardless of how many
+    * matched before. If a hash is forced, only this hash is compared,
+    * all others are ignored.
     */
    bool operator==(HashStringList const &other) const;
    bool operator!=(HashStringList const &other) const;
@@ -152,30 +163,63 @@ class HashStringList
 
 class Hashes
 {
+   /** \brief dpointer placeholder */
+   void *d;
+
    public:
+   /* those will disappear in the future as it is hard to add new ones this way.
+    * Use Add* to build the results and get them via GetHashStringList() instead */
+   APT_DEPRECATED MD5Summation MD5;
+   APT_DEPRECATED SHA1Summation SHA1;
+   APT_DEPRECATED SHA256Summation SHA256;
+   APT_DEPRECATED SHA512Summation SHA512;
 
-   MD5Summation MD5;
-   SHA1Summation SHA1;
-   SHA256Summation SHA256;
-   SHA512Summation SHA512;
-   
    static const int UntilEOF = 0;
 
-   inline bool Add(const unsigned char *Data,unsigned long long Size)
+   bool Add(const unsigned char * const Data, unsigned long long const Size, unsigned int const Hashes = ~0);
+   inline bool Add(const char * const Data)
+   {return Add((unsigned char const * const)Data,strlen(Data));};
+   inline bool Add(const unsigned char * const Beg,const unsigned char * const End)
+   {return Add(Beg,End-Beg);};
+
+   enum SupportedHashes { MD5SUM = (1 << 0), SHA1SUM = (1 << 1), SHA256SUM = (1 << 2),
+      SHA512SUM = (1 << 3) };
+   bool AddFD(int const Fd,unsigned long long Size = 0, unsigned int const Hashes = ~0);
+   bool AddFD(FileFd &Fd,unsigned long long Size = 0, unsigned int const Hashes = ~0);
+
+   HashStringList GetHashStringList();
+
+#if __GNUC__ >= 4
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+   Hashes();
+   virtual ~Hashes();
+#if __GNUC__ >= 4
+	#pragma GCC diagnostic pop
+#endif
+
+   private:
+   APT_HIDDEN APT_CONST inline unsigned int boolsToFlag(bool const addMD5, bool const addSHA1, bool const addSHA256, bool const addSHA512)
    {
-      return MD5.Add(Data,Size) && SHA1.Add(Data,Size) && SHA256.Add(Data,Size) && SHA512.Add(Data,Size);
+      unsigned int Hashes = ~0;
+      if (addMD5 == false) Hashes &= ~MD5SUM;
+      if (addSHA1 == false) Hashes &= ~SHA1SUM;
+      if (addSHA256 == false) Hashes &= ~SHA256SUM;
+      if (addSHA512 == false) Hashes &= ~SHA512SUM;
+      return Hashes;
+   }
+
+   public:
+   APT_DEPRECATED bool AddFD(int const Fd, unsigned long long Size, bool const addMD5,
+	 bool const addSHA1, bool const addSHA256, bool const addSHA512) {
+      return AddFD(Fd, Size, boolsToFlag(addMD5, addSHA1, addSHA256, addSHA512));
+   };
+
+   APT_DEPRECATED bool AddFD(FileFd &Fd, unsigned long long Size, bool const addMD5,
+	 bool const addSHA1, bool const addSHA256, bool const addSHA512) {
+      return AddFD(Fd, Size, boolsToFlag(addMD5, addSHA1, addSHA256, addSHA512));
    };
-   inline bool Add(const char *Data) {return Add((unsigned char const *)Data,strlen(Data));};
-   inline bool AddFD(int const Fd,unsigned long long Size = 0)
-   { return AddFD(Fd, Size, true, true, true, true); };
-   bool AddFD(int const Fd, unsigned long long Size, bool const addMD5,
-	      bool const addSHA1, bool const addSHA256, bool const addSHA512);
-   inline bool AddFD(FileFd &Fd,unsigned long long Size = 0)
-   { return AddFD(Fd, Size, true, true, true, true); };
-   bool AddFD(FileFd &Fd, unsigned long long Size, bool const addMD5,
-	      bool const addSHA1, bool const addSHA256, bool const addSHA512);
-   inline bool Add(const unsigned char *Beg,const unsigned char *End) 
-                  {return Add(Beg,End-Beg);};
 };
 
 #endif