X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/2ca99a0dceb4101f1ecaff0348b1684cb975099c..be9b62f76406cf2546d21f3ca27587ee20e0fc37:/apt-pkg/tagfile.h diff --git a/apt-pkg/tagfile.h b/apt-pkg/tagfile.h index f7f8155a5..f361a787f 100644 --- a/apt-pkg/tagfile.h +++ b/apt-pkg/tagfile.h @@ -20,24 +20,33 @@ #ifndef PKGLIB_TAGFILE_H #define PKGLIB_TAGFILE_H -#ifdef __GNUG__ -#pragma interface "apt-pkg/tagfile.h" -#endif #include <apt-pkg/fileutl.h> #include <stdio.h> - + class pkgTagSection { const char *Section; - const char *Stop; - // We have a limit of 256 tags per section. - unsigned short Indexes[256]; - unsigned short AlphaIndexes[0x100]; - + unsigned int Indexes[256]; + unsigned int AlphaIndexes[0x100]; unsigned int TagCount; - + // dpointer placeholder (for later in case we need it) + void *d; + + /* This very simple hash function for the last 8 letters gives + very good performance on the debian package files */ + inline static unsigned long AlphaHash(const char *Text, const char *End = 0) + { + unsigned long Res = 0; + for (; Text != End && *Text != ':' && *Text != 0; Text++) + Res = ((unsigned long)(*Text) & 0xDF) ^ (Res << 1); + return Res & 0xFF; + } + + protected: + const char *Stop; + public: inline bool operator ==(const pkgTagSection &rhs) {return Section == rhs.Section;}; @@ -47,13 +56,17 @@ class pkgTagSection bool Find(const char *Tag,unsigned &Pos) const; string FindS(const char *Tag) const; signed int FindI(const char *Tag,signed long Default = 0) const ; + unsigned long long FindULL(const char *Tag, unsigned long long const &Default = 0) const; bool FindFlag(const char *Tag,unsigned long &Flags, unsigned long Flag) const; bool Scan(const char *Start,unsigned long MaxLength); inline unsigned long size() const {return Stop - Section;}; void Trim(); + virtual void TrimRecord(bool BeforeRecord, const char* &End); inline unsigned int Count() const {return TagCount;}; + inline bool Exists(const char* const Tag) {return AlphaIndexes[AlphaHash(Tag)] != 0;} + inline void Get(const char *&Start,const char *&Stop,unsigned int I) const {Start = Section + Indexes[I]; Stop = Section + Indexes[I+1];} @@ -64,28 +77,25 @@ class pkgTagSection }; pkgTagSection() : Section(0), Stop(0) {}; + virtual ~pkgTagSection() {}; }; +class pkgTagFilePrivate; class pkgTagFile { - FileFd &Fd; - char *Buffer; - char *Start; - char *End; - bool Done; - unsigned long iOffset; - unsigned long Size; - + pkgTagFilePrivate *d; + bool Fill(); - + bool Resize(); + public: bool Step(pkgTagSection &Section); - inline unsigned long Offset() {return iOffset;}; + unsigned long Offset(); bool Jump(pkgTagSection &Tag,unsigned long Offset); - pkgTagFile(FileFd *F,unsigned long Size = 64*1024); - ~pkgTagFile(); + pkgTagFile(FileFd *F,unsigned long Size = 32*1024); + virtual ~pkgTagFile(); }; /* This is the list of things to rewrite. The rewriter