just-in-time creation for (explicit) negative deps

[apt.git] / apt-pkg / tagfile.h

diff --git a/apt-pkg/tagfile.h b/apt-pkg/tagfile.h
index d09e7046c23f7d9156a5b3eda5a77a23564a0557..19c07595e13066307cc24a41fa08d8d9ca945fe9 100644 (file)
--- a/apt-pkg/tagfile.h
+++ b/apt-pkg/tagfile.h
@@ -1,6 +1,5 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: tagfile.h,v 1.20 2003/05/19 17:13:57 doogie Exp $
 /* ######################################################################
 
    Fast scanner for RFC-822 type header information
@@ -38,32 +37,29 @@ class pkgTagSectionPrivate;
 class pkgTagSection
 {
    const char *Section;
-   // We have a limit of 256 tags per section with the old abi
-#if APT_PKG_ABI < 413
-   APT_DEPRECATED unsigned int Indexes[256];
-#endif
    unsigned int AlphaIndexes[0x100];
-#if APT_PKG_ABI < 413
-   APT_DEPRECATED unsigned int TagCount;
-#endif
 
-   // dpointer placeholder (for later in case we need it)
-   pkgTagSectionPrivate *d;
+   pkgTagSectionPrivate * const d;
 
    protected:
    const char *Stop;
 
    public:
-   
+
    inline bool operator ==(const pkgTagSection &rhs) {return Section == rhs.Section;};
    inline bool operator !=(const pkgTagSection &rhs) {return Section != rhs.Section;};
-   
+
    bool Find(const char *Tag,const char *&Start, const char *&End) const;
    bool Find(const char *Tag,unsigned int &Pos) const;
    std::string FindS(const char *Tag) const;
+   std::string FindRawS(const char *Tag) const;
    signed int FindI(const char *Tag,signed long Default = 0) const;
    bool FindB(const char *Tag, bool const &Default = false) const;
    unsigned long long FindULL(const char *Tag, unsigned long long const &Default = 0) const;
+   bool FindFlag(const char * const Tag,uint8_t &Flags,
+                uint8_t const Flag) const;
+   bool static FindFlag(uint8_t &Flags, uint8_t const Flag,
+                               const char* const Start, const char* const Stop);
    bool FindFlag(const char *Tag,unsigned long &Flags,
                 unsigned long Flag) const;
    bool static FindFlag(unsigned long &Flags, unsigned long Flag,
@@ -85,12 +81,7 @@ class pkgTagSection
     * @return \b true if section end was found, \b false otherwise.
     *  Beware that internal state will be inconsistent if \b false is returned!
     */
-#if APT_PKG_ABI >= 413
    APT_MUSTCHECK bool Scan(const char *Start, unsigned long MaxLength, bool const Restart = true);
-#else
-   APT_MUSTCHECK bool Scan(const char *Start, unsigned long MaxLength, bool const Restart);
-   APT_MUSTCHECK bool Scan(const char *Start, unsigned long MaxLength);
-#endif
 
    inline unsigned long size() const {return Stop - Section;};
    void Trim();
@@ -102,11 +93,7 @@ class pkgTagSection
     * times, but only the last occurrence is available via Find methods.
     */
    unsigned int Count() const;
-#if APT_PKG_ABI >= 413
    bool Exists(const char* const Tag) const;
-#else
-   bool Exists(const char* const Tag);
-#endif
 
    void Get(const char *&Start,const char *&Stop,unsigned int I) const;
 
@@ -115,15 +102,46 @@ class pkgTagSection
       Start = Section;
       Stop = this->Stop;
    };
-   
+
    pkgTagSection();
    virtual ~pkgTagSection();
+
+   struct Tag
+   {
+      enum ActionType { REMOVE, RENAME, REWRITE } Action;
+      std::string Name;
+      std::string Data;
+
+      static Tag Remove(std::string const &Name);
+      static Tag Rename(std::string const &OldName, std::string const &NewName);
+      static Tag Rewrite(std::string const &Name, std::string const &Data);
+      private:
+      Tag(ActionType const Action, std::string const &Name, std::string const &Data) :
+        Action(Action), Name(Name), Data(Data) {}
+   };
+
+   /** Write this section (with optional rewrites) to a file
+    *
+    * @param File to write the section to
+    * @param Order in which tags should appear in the file
+    * @param Rewrite is a set of tags to be renamed, rewritten and/or removed
+    * @return \b true if successful, otherwise \b false
+    */
+   bool Write(FileFd &File, char const * const * const Order = NULL, std::vector<Tag> const &Rewrite = std::vector<Tag>()) const;
+};
+
+
+/* For user generated file the parser should be a bit more relaxed in exchange
+   for being a bit slower to allow comments and new lines all over the place */
+class pkgUserTagSection : public pkgTagSection
+{
+   virtual void TrimRecord(bool BeforeRecord, const char* &End) APT_OVERRIDE;
 };
 
 class pkgTagFilePrivate;
 class pkgTagFile
 {
-   pkgTagFilePrivate *d;
+   pkgTagFilePrivate * const d;
 
    APT_HIDDEN bool Fill();
    APT_HIDDEN bool Resize();
@@ -135,26 +153,25 @@ class pkgTagFile
    unsigned long Offset();
    bool Jump(pkgTagSection &Tag,unsigned long long Offset);
 
-   void Init(FileFd *F,unsigned long long Size = 32*1024);
+   void Init(FileFd * const F,unsigned long long const Size = 32*1024);
 
-   pkgTagFile(FileFd *F,unsigned long long Size = 32*1024);
+   pkgTagFile(FileFd * const F,unsigned long long Size = 32*1024);
    virtual ~pkgTagFile();
 };
 
-/* This is the list of things to rewrite. The rewriter
-   goes through and changes or adds each of these headers
-   to suit. A zero forces the header to be erased, an empty string
-   causes the old value to be used. (rewrite rule ignored) */
-struct TFRewriteData
+extern const char **TFRewritePackageOrder;
+extern const char **TFRewriteSourceOrder;
+
+// Use pkgTagSection::Tag and pkgTagSection::Write() instead
+APT_IGNORE_DEPRECATED_PUSH
+struct APT_DEPRECATED TFRewriteData
 {
    const char *Tag;
    const char *Rewrite;
    const char *NewTag;
 };
-extern const char **TFRewritePackageOrder;
-extern const char **TFRewriteSourceOrder;
-
-bool TFRewrite(FILE *Output,pkgTagSection const &Tags,const char *Order[],
+APT_DEPRECATED bool TFRewrite(FILE *Output,pkgTagSection const &Tags,const char *Order[],
               TFRewriteData *Rewrite);
+APT_IGNORE_DEPRECATED_POP
 
 #endif