diff options
Diffstat (limited to 'apt-pkg/pkgcachegen.h')
| -rw-r--r-- | apt-pkg/pkgcachegen.h | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/apt-pkg/pkgcachegen.h b/apt-pkg/pkgcachegen.h new file mode 100644 index 000000000..228b9f71d --- /dev/null +++ b/apt-pkg/pkgcachegen.h @@ -0,0 +1,247 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + Package Cache Generator - Generator for the cache structure. + + This builds the cache structure from the abstract package list parser. + Each archive source has it's own list parser that is instantiated by + the caller to provide data for the generator. + + Parts of the cache are created by this generator class while other + parts are created by the list parser. The list parser is responsible + for creating version, depends and provides structures, and some of + their contents + + ##################################################################### */ + /*}}}*/ +#ifndef PKGLIB_PKGCACHEGEN_H +#define PKGLIB_PKGCACHEGEN_H + +#include <apt-pkg/md5.h> +#include <apt-pkg/mmap.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/cacheiterators.h> +#include <apt-pkg/macros.h> + +#include <vector> +#include <string> +#if __cplusplus >= 201103L +#include <unordered_set> +#endif +#ifdef APT_PKG_EXPOSE_STRING_VIEW +#include <apt-pkg/string_view.h> +#endif + +class FileFd; +class pkgSourceList; +class OpProgress; +class pkgIndexFile; +class pkgCacheListParser; + +class APT_HIDDEN pkgCacheGenerator /*{{{*/ +{ + APT_HIDDEN map_stringitem_t WriteStringInMap(std::string const &String) { return WriteStringInMap(String.c_str()); }; + APT_HIDDEN map_stringitem_t WriteStringInMap(const char *String); + APT_HIDDEN map_stringitem_t WriteStringInMap(const char *String, const unsigned long &Len); + APT_HIDDEN map_pointer_t AllocateInMap(const unsigned long &size); + + // Dirty hack for public users that do not use C++11 yet +#if __cplusplus >= 201103L + struct string_pointer { + const char *data_; + size_t size; + pkgCacheGenerator *generator; + map_stringitem_t item; + + const char *data() const { + return data_ != nullptr ? data_ : static_cast<char*>(generator->Map.Data()) + item; + } + + bool operator ==(string_pointer const &other) const { + return size == other.size && memcmp(data(), other.data(), size) == 0; + } + }; + struct hash { + uint32_t operator()(string_pointer const &that) const { + uint32_t Hash = 5381; + const char * const end = that.data() + that.size; + for (const char *I = that.data(); I != end; ++I) + Hash = 33 * Hash + *I; + return Hash; + } + }; + + std::unordered_set<string_pointer, hash> strMixed; + std::unordered_set<string_pointer, hash> strPkgNames; + std::unordered_set<string_pointer, hash> strVersions; + std::unordered_set<string_pointer, hash> strSections; +#endif + + friend class pkgCacheListParser; + typedef pkgCacheListParser ListParser; + + public: + + template<typename Iter> class Dynamic { + public: + static std::vector<Iter*> toReMap; + explicit Dynamic(Iter &I) { + toReMap.push_back(&I); + } + + ~Dynamic() { + toReMap.pop_back(); + } + +#if __cplusplus >= 201103L + Dynamic(const Dynamic&) = delete; + void operator=(const Dynamic&) = delete; +#endif + }; + + protected: + + DynamicMMap ⤅ + pkgCache Cache; + OpProgress *Progress; + + std::string RlsFileName; + pkgCache::ReleaseFile *CurrentRlsFile; + std::string PkgFileName; + pkgCache::PackageFile *CurrentFile; + +#ifdef APT_PKG_EXPOSE_STRING_VIEW + bool NewGroup(pkgCache::GrpIterator &Grp, APT::StringView Name); + bool NewPackage(pkgCache::PkgIterator &Pkg, APT::StringView Name, APT::StringView Arch); + map_pointer_t NewVersion(pkgCache::VerIterator &Ver, APT::StringView const &VerStr, + map_pointer_t const ParentPkg, unsigned short const Hash, + map_pointer_t const Next); +#endif + bool NewFileVer(pkgCache::VerIterator &Ver,ListParser &List); + bool NewFileDesc(pkgCache::DescIterator &Desc,ListParser &List); + bool NewDepends(pkgCache::PkgIterator &Pkg, pkgCache::VerIterator &Ver, + map_pointer_t const Version, uint8_t const Op, + uint8_t const Type, map_pointer_t* &OldDepLast); + map_pointer_t NewDescription(pkgCache::DescIterator &Desc,const std::string &Lang,const MD5SumValue &md5sum,map_stringitem_t const idxmd5str); + bool NewProvides(pkgCache::VerIterator &Ver, pkgCache::PkgIterator &Pkg, + map_stringitem_t const ProvidesVersion, uint8_t const Flags); + + public: + + enum StringType { MIXED, PKGNAME, VERSIONNUMBER, SECTION }; + map_stringitem_t StoreString(StringType const type, const char * S, unsigned int const Size); + +#ifdef APT_PKG_EXPOSE_STRING_VIEW + inline map_stringitem_t StoreString(enum StringType const type, APT::StringView S) {return StoreString(type, S.data(),S.length());}; +#endif + + void DropProgress() {Progress = 0;}; + bool SelectFile(const std::string &File,pkgIndexFile const &Index, std::string const &Architecture, std::string const &Component, unsigned long Flags = 0); + bool SelectReleaseFile(const std::string &File, const std::string &Site, unsigned long Flags = 0); + bool MergeList(ListParser &List,pkgCache::VerIterator *Ver = 0); + inline pkgCache &GetCache() {return Cache;}; + inline pkgCache::PkgFileIterator GetCurFile() + {return pkgCache::PkgFileIterator(Cache,CurrentFile);}; + inline pkgCache::RlsFileIterator GetCurRlsFile() + {return pkgCache::RlsFileIterator(Cache,CurrentRlsFile);}; + + APT_PUBLIC static bool MakeStatusCache(pkgSourceList &List,OpProgress *Progress, + MMap **OutMap = 0,bool AllowMem = false); + APT_HIDDEN static bool MakeStatusCache(pkgSourceList &List,OpProgress *Progress, + MMap **OutMap,pkgCache **OutCache, bool AllowMem = false); + APT_PUBLIC static bool MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap); + + void ReMap(void const * const oldMap, void const * const newMap, size_t oldSize); + bool Start(); + + pkgCacheGenerator(DynamicMMap *Map,OpProgress *Progress); + virtual ~pkgCacheGenerator(); + + private: + void * const d; + APT_HIDDEN bool MergeListGroup(ListParser &List, std::string const &GrpName); + APT_HIDDEN bool MergeListPackage(ListParser &List, pkgCache::PkgIterator &Pkg); +#ifdef APT_PKG_EXPOSE_STRING_VIEW + APT_HIDDEN bool MergeListVersion(ListParser &List, pkgCache::PkgIterator &Pkg, + APT::StringView const &Version, pkgCache::VerIterator* &OutVer); +#endif + + APT_HIDDEN bool AddImplicitDepends(pkgCache::GrpIterator &G, pkgCache::PkgIterator &P, + pkgCache::VerIterator &V); + APT_HIDDEN bool AddImplicitDepends(pkgCache::VerIterator &V, pkgCache::PkgIterator &D); + + APT_HIDDEN bool AddNewDescription(ListParser &List, pkgCache::VerIterator &Ver, + std::string const &lang, MD5SumValue const &CurMd5, map_stringitem_t &md5idx); +}; + /*}}}*/ +// This is the abstract package list parser class. /*{{{*/ +class APT_HIDDEN pkgCacheListParser +{ + pkgCacheGenerator *Owner; + friend class pkgCacheGenerator; + + // Some cache items + pkgCache::VerIterator OldDepVer; + map_pointer_t *OldDepLast; + + void * const d; + + protected: + + inline map_stringitem_t StoreString(pkgCacheGenerator::StringType const type, const char *S,unsigned int Size) {return Owner->StoreString(type, S, Size);}; +#ifdef APT_PKG_EXPOSE_STRING_VIEW + inline map_stringitem_t StoreString(pkgCacheGenerator::StringType const type, APT::StringView S) {return Owner->StoreString(type, S);}; +#endif + + inline map_stringitem_t WriteString(const std::string &S) {return Owner->WriteStringInMap(S);}; + inline map_stringitem_t WriteString(const char *S,unsigned int Size) {return Owner->WriteStringInMap(S,Size);}; +#ifdef APT_PKG_EXPOSE_STRING_VIEW + bool NewDepends(pkgCache::VerIterator &Ver,APT::StringView Package, APT::StringView Arch, + APT::StringView Version,uint8_t const Op, + uint8_t const Type); + bool NewProvides(pkgCache::VerIterator &Ver,APT::StringView PkgName, + APT::StringView PkgArch, APT::StringView Version, + uint8_t const Flags); + bool NewProvidesAllArch(pkgCache::VerIterator &Ver, APT::StringView Package, + APT::StringView Version, uint8_t const Flags); +#endif + public: + + // These all operate against the current section + virtual std::string Package() = 0; + virtual bool ArchitectureAll() = 0; +#ifdef APT_PKG_EXPOSE_STRING_VIEW + virtual APT::StringView Architecture() = 0; + virtual APT::StringView Version() = 0; +#endif + virtual bool NewVersion(pkgCache::VerIterator &Ver) = 0; + virtual std::vector<std::string> AvailableDescriptionLanguages() = 0; + virtual MD5SumValue Description_md5() = 0; + virtual unsigned short VersionHash() = 0; + /** compare currently parsed version with given version + * + * \param Hash of the currently parsed version + * \param Ver to compare with + */ + virtual bool SameVersion(unsigned short const Hash, pkgCache::VerIterator const &Ver); + virtual bool UsePackage(pkgCache::PkgIterator &Pkg, + pkgCache::VerIterator &Ver) = 0; + virtual map_filesize_t Offset() = 0; + virtual map_filesize_t Size() = 0; + + virtual bool Step() = 0; + + virtual bool CollectFileProvides(pkgCache &/*Cache*/, + pkgCache::VerIterator &/*Ver*/) {return true;}; + + pkgCacheListParser(); + virtual ~pkgCacheListParser(); +}; + /*}}}*/ + +APT_DEPRECATED_MSG("Use pkgCacheGenerator::MakeStatusCache instead") bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress, + MMap **OutMap = 0,bool AllowMem = false); +APT_DEPRECATED_MSG("Use pkgCacheGenerator::MakeOnlyStatusCache instead") bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap); + +#endif |