diff options
Diffstat (limited to 'apt-pkg/pkgcache.h')
| -rw-r--r-- | apt-pkg/pkgcache.h | 236 |
1 files changed, 114 insertions, 122 deletions
diff --git a/apt-pkg/pkgcache.h b/apt-pkg/pkgcache.h index 5e8a9630a..6a89eabd7 100644 --- a/apt-pkg/pkgcache.h +++ b/apt-pkg/pkgcache.h @@ -79,11 +79,23 @@ #include <string> #include <time.h> +#include <stdint.h> #ifndef APT_8_CLEANER_HEADERS using std::string; #endif +// storing file sizes of indexes, which are way below 4 GB for now +typedef uint32_t map_filesize_t; +// each package/group/dependency gets an id +typedef uint32_t map_id_t; +// some files get an id, too, but in far less absolute numbers +typedef uint16_t map_fileid_t; +// relative pointer from cache start +typedef uint32_t map_pointer_t; +// same as the previous, but documented to be to a string item +typedef map_pointer_t map_stringitem_t; + class pkgVersioningSystem; class pkgCache /*{{{*/ { @@ -97,7 +109,6 @@ class pkgCache /*{{{*/ struct Description; struct Provides; struct Dependency; - struct StringItem; struct VerFile; struct DescFile; @@ -138,7 +149,7 @@ class pkgCache /*{{{*/ /** \brief priority of a package version Zero is used for unparsable or absent Priority fields. */ - enum VerPriority {Important=1,Required=2,Standard=3,Optional=4,Extra=5}; + enum VerPriority {Required=1,Important=2,Standard=3,Optional=4,Extra=5}; enum PkgSelectedState {Unknown=0,Install=1,Hold=2,DeInstall=3,Purge=4}; enum PkgInstState {Ok=0,ReInstReq=1,HoldInst=2,HoldReInstReq=3}; enum PkgCurrentState {NotInstalled=0,UnPacked=1,HalfConfigured=2, @@ -158,8 +169,8 @@ class pkgCache /*{{{*/ std::string CacheFile; MMap ⤅ - unsigned long sHash(const std::string &S) const APT_PURE; - unsigned long sHash(const char *S) const APT_PURE; + map_id_t sHash(const std::string &S) const APT_PURE; + map_id_t sHash(const char *S) const APT_PURE; public: @@ -174,7 +185,6 @@ class pkgCache /*{{{*/ Description *DescP; Provides *ProvideP; Dependency *DepP; - StringItem *StringItemP; char *StrP; virtual bool ReMap(bool const &Errorchecks = true); @@ -183,8 +193,8 @@ class pkgCache /*{{{*/ inline void *DataEnd() {return ((unsigned char *)Map.Data()) + Map.Size();} // String hashing function (512 range) - inline unsigned long Hash(const std::string &S) const {return sHash(S);} - inline unsigned long Hash(const char *S) const {return sHash(S);} + inline map_id_t Hash(const std::string &S) const {return sHash(S);} + inline map_id_t Hash(const char *S) const {return sHash(S);} // Useful transformation things const char *Priority(unsigned char Priority); @@ -263,35 +273,31 @@ struct pkgCache::Header These indicate the number of each structure contained in the cache. PackageCount is especially useful for generating user state structures. See Package::Id for more info. */ - unsigned long GroupCount; - unsigned long PackageCount; - unsigned long VersionCount; - unsigned long DescriptionCount; - unsigned long DependsCount; - unsigned long PackageFileCount; - unsigned long VerFileCount; - unsigned long DescFileCount; - unsigned long ProvidesCount; + map_id_t GroupCount; + map_id_t PackageCount; + map_id_t VersionCount; + map_id_t DescriptionCount; + map_id_t DependsCount; + map_fileid_t PackageFileCount; + map_fileid_t VerFileCount; + map_fileid_t DescFileCount; + map_id_t ProvidesCount; /** \brief index of the first PackageFile structure The PackageFile structures are singly linked lists that represent all package files that have been merged into the cache. */ - map_ptrloc FileList; - /** \brief index of the first StringItem structure - - The cache contains a list of all the unique strings (StringItems). - The parser reads this list into memory so it can match strings - against it.*/ - map_ptrloc StringList; + map_pointer_t FileList; /** \brief String representing the version system used */ - map_ptrloc VerSysName; - /** \brief Architecture(s) the cache was built against */ - map_ptrloc Architecture; + map_pointer_t VerSysName; + /** \brief native architecture the cache was built against */ + map_pointer_t Architecture; + /** \brief all architectures the cache was built against */ + map_pointer_t Architectures; /** \brief The maximum size of a raw entry from the original Package file */ - unsigned long MaxVerFileSize; + map_filesize_t MaxVerFileSize; /** \brief The maximum size of a raw entry from the original Translation file */ - unsigned long MaxDescFileSize; + map_filesize_t MaxDescFileSize; /** \brief The Pool structures manage the allocation pools that the generator uses @@ -302,23 +308,23 @@ struct pkgCache::Header stores this information so future additions can make use of any unused pool blocks. */ DynamicMMap::Pool Pools[9]; - + /** \brief hash tables providing rapid group/package name lookup - Each group/package name is inserted into the hash table using pkgCache::Hash(const &string) + Each group/package name is inserted into a hash table using pkgCache::Hash(const &string) By iterating over each entry in the hash table it is possible to iterate over the entire list of packages. Hash Collisions are handled with a singly linked list of packages based at the hash item. The linked list contains only packages that match the hashing function. In the PkgHashTable is it possible that multiple packages have the same name - these packages are stored as a sequence in the list. - - Beware: The Hashmethod assumes that the hash table sizes are equal */ - map_ptrloc PkgHashTable[2*1048]; - map_ptrloc GrpHashTable[2*1048]; + The size of both tables is the same. */ + unsigned int HashTableSize; + map_pointer_t * PkgHashTable() const { return (map_pointer_t*) (this + 1); } + map_pointer_t * GrpHashTable() const { return PkgHashTable() + HashTableSize; } /** \brief Size of the complete cache file */ - unsigned long CacheFileSize; + unsigned long long CacheFileSize; bool CheckSizes(Header &Against) const APT_PURE; Header(); @@ -334,17 +340,17 @@ struct pkgCache::Header struct pkgCache::Group { /** \brief Name of the group */ - map_ptrloc Name; // StringItem + map_stringitem_t Name; // Linked List /** \brief Link to the first package which belongs to the group */ - map_ptrloc FirstPackage; // Package + map_pointer_t FirstPackage; // Package /** \brief Link to the last package which belongs to the group */ - map_ptrloc LastPackage; // Package + map_pointer_t LastPackage; // Package /** \brief Link to the next Group */ - map_ptrloc Next; // Group + map_pointer_t Next; // Group /** \brief unique sequel ID */ - unsigned int ID; + map_id_t ID; }; /*}}}*/ @@ -362,10 +368,13 @@ struct pkgCache::Group */ struct pkgCache::Package { - /** \brief Name of the package */ - map_ptrloc Name; // StringItem + /** \brief Name of the package + * Note that the access method Name() will remain. It is just this data member + * deprecated as this information is already stored and available via the + * associated Group – so it is wasting precious binary cache space */ + APT_DEPRECATED map_stringitem_t Name; /** \brief Architecture of the package */ - map_ptrloc Arch; // StringItem + map_stringitem_t Arch; /** \brief Base of a singly linked list of versions Each structure represents a unique version of the package. @@ -375,24 +384,19 @@ struct pkgCache::Package versions of a package can be cleanly handled by the system. Furthermore, this linked list is guaranteed to be sorted from Highest version to lowest version with no duplicate entries. */ - map_ptrloc VersionList; // Version + map_pointer_t VersionList; // Version /** \brief index to the installed version */ - map_ptrloc CurrentVer; // Version - /** \brief indicates the deduced section - - Should be the index to the string "Unknown" or to the section - of the last parsed item. */ - map_ptrloc Section; // StringItem + map_pointer_t CurrentVer; // Version /** \brief index of the group this package belongs to */ - map_ptrloc Group; // Group the Package belongs to + map_pointer_t Group; // Group the Package belongs to // Linked list /** \brief Link to the next package in the same bucket */ - map_ptrloc NextPackage; // Package + map_pointer_t Next; // Package /** \brief List of all dependencies on this package */ - map_ptrloc RevDepends; // Dependency + map_pointer_t RevDepends; // Dependency /** \brief List of all "packages" this package provide */ - map_ptrloc ProvidesList; // Provides + map_pointer_t ProvidesList; // Provides // Install/Remove/Purge etc /** \brief state that the user wishes the package to be in */ @@ -412,7 +416,7 @@ struct pkgCache::Package This allows clients to create an array of size PackageCount and use it to store state information for the package map. For instance the status file emitter uses this to track which packages have been emitted already. */ - unsigned int ID; + map_id_t ID; /** \brief some useful indicators of the package's state */ unsigned long Flags; }; @@ -426,30 +430,30 @@ struct pkgCache::Package struct pkgCache::PackageFile { /** \brief physical disk file that this PackageFile represents */ - map_ptrloc FileName; // StringItem + map_stringitem_t FileName; /** \brief the release information Please see the files document for a description of what the release information means. */ - map_ptrloc Archive; // StringItem - map_ptrloc Codename; // StringItem - map_ptrloc Component; // StringItem - map_ptrloc Version; // StringItem - map_ptrloc Origin; // StringItem - map_ptrloc Label; // StringItem - map_ptrloc Architecture; // StringItem + map_stringitem_t Archive; + map_stringitem_t Codename; + map_stringitem_t Component; + map_stringitem_t Version; + map_stringitem_t Origin; + map_stringitem_t Label; + map_stringitem_t Architecture; /** \brief The site the index file was fetched from */ - map_ptrloc Site; // StringItem + map_stringitem_t Site; /** \brief indicates what sort of index file this is @TODO enumerate at least the possible indexes */ - map_ptrloc IndexType; // StringItem + map_stringitem_t IndexType; /** \brief Size of the file Used together with the modification time as a simple check to ensure that the Packages file has not been altered since Cache generation. */ - unsigned long Size; + map_filesize_t Size; /** \brief Modification time for the file */ time_t mtime; @@ -458,9 +462,9 @@ struct pkgCache::PackageFile // Linked list /** \brief Link to the next PackageFile in the Cache */ - map_ptrloc NextFile; // PackageFile + map_pointer_t NextFile; // PackageFile /** \brief unique sequel ID */ - unsigned int ID; + map_fileid_t ID; }; /*}}}*/ // VerFile structure /*{{{*/ @@ -471,13 +475,13 @@ struct pkgCache::PackageFile struct pkgCache::VerFile { /** \brief index of the package file that this version was found in */ - map_ptrloc File; // PackageFile + map_pointer_t File; // PackageFile /** \brief next step in the linked list */ - map_ptrloc NextFile; // PkgVerFile + map_pointer_t NextFile; // PkgVerFile /** \brief position in the package file */ - map_ptrloc Offset; // File offset + map_filesize_t Offset; // File offset /** @TODO document pkgCache::VerFile::Size */ - unsigned long Size; + map_filesize_t Size; }; /*}}}*/ // DescFile structure /*{{{*/ @@ -485,13 +489,13 @@ struct pkgCache::VerFile struct pkgCache::DescFile { /** \brief index of the file that this description was found in */ - map_ptrloc File; // PackageFile + map_pointer_t File; // PackageFile /** \brief next step in the linked list */ - map_ptrloc NextFile; // PkgVerFile + map_pointer_t NextFile; // PkgVerFile /** \brief position in the file */ - map_ptrloc Offset; // File offset + map_filesize_t Offset; // File offset /** @TODO document pkgCache::DescFile::Size */ - unsigned long Size; + map_filesize_t Size; }; /*}}}*/ // Version structure /*{{{*/ @@ -503,9 +507,15 @@ struct pkgCache::DescFile struct pkgCache::Version { /** \brief complete version string */ - map_ptrloc VerStr; // StringItem + map_stringitem_t VerStr; /** \brief section this version is filled in */ - map_ptrloc Section; // StringItem + map_stringitem_t Section; + /** \brief source package name this version comes from + Always contains the name, even if it is the same as the binary name */ + map_stringitem_t SourcePkgName; + /** \brief source version this version comes from + Always contains the version string, even if it is the same as the binary version */ + map_stringitem_t SourceVerStr; /** \brief Multi-Arch capabilities of a package version */ enum VerMultiArch { None = 0, /*!< is the default and doesn't trigger special behaviour */ @@ -527,33 +537,33 @@ struct pkgCache::Version applies to. If FileList is 0 then this is a blank version. The structure should also have a 0 in all other fields excluding pkgCache::Version::VerStr and Possibly pkgCache::Version::NextVer. */ - map_ptrloc FileList; // VerFile + map_pointer_t FileList; // VerFile /** \brief next (lower or equal) version in the linked list */ - map_ptrloc NextVer; // Version + map_pointer_t NextVer; // Version /** \brief next description in the linked list */ - map_ptrloc DescriptionList; // Description + map_pointer_t DescriptionList; // Description /** \brief base of the dependency list */ - map_ptrloc DependsList; // Dependency + map_pointer_t DependsList; // Dependency /** \brief links to the owning package This allows reverse dependencies to determine the package */ - map_ptrloc ParentPkg; // Package + map_pointer_t ParentPkg; // Package /** \brief list of pkgCache::Provides */ - map_ptrloc ProvidesList; // Provides + map_pointer_t ProvidesList; // Provides /** \brief archive size for this version For Debian this is the size of the .deb file. */ - unsigned long long Size; // These are the .deb size + uint64_t Size; // These are the .deb size /** \brief uncompressed size for this version */ - unsigned long long InstalledSize; + uint64_t InstalledSize; /** \brief characteristic value representing this version No two packages in existence should have the same VerStr and Hash with different contents. */ unsigned short Hash; /** \brief unique sequel ID */ - unsigned int ID; + map_id_t ID; /** \brief parsed priority value */ unsigned char Priority; }; @@ -566,22 +576,22 @@ struct pkgCache::Description If the value has a 0 length then this is read using the Package file else the Translation-CODE file is used. */ - map_ptrloc language_code; // StringItem + map_stringitem_t language_code; /** \brief MD5sum of the original description Used to map Translations of a description to a version and to check that the Translation is up-to-date. */ - map_ptrloc md5sum; // StringItem + map_stringitem_t md5sum; /** @TODO document pkgCache::Description::FileList */ - map_ptrloc FileList; // DescFile + map_pointer_t FileList; // DescFile /** \brief next translation for this description */ - map_ptrloc NextDesc; // Description + map_pointer_t NextDesc; // Description /** \brief the text is a description of this package */ - map_ptrloc ParentPkg; // Package + map_pointer_t ParentPkg; // Package /** \brief unique sequel ID */ - unsigned int ID; + map_id_t ID; }; /*}}}*/ // Dependency structure /*{{{*/ @@ -594,21 +604,21 @@ struct pkgCache::Description struct pkgCache::Dependency { /** \brief string of the version the dependency is applied against */ - map_ptrloc Version; // StringItem + map_stringitem_t Version; /** \brief index of the package this depends applies to The generator will - if the package does not already exist - create a blank (no version records) package. */ - map_ptrloc Package; // Package + map_pointer_t Package; // Package /** \brief next dependency of this version */ - map_ptrloc NextDepends; // Dependency + map_pointer_t NextDepends; // Dependency /** \brief next reverse dependency of this package */ - map_ptrloc NextRevDepends; // Dependency + map_pointer_t NextRevDepends; // Dependency /** \brief version of the package which has the reverse depends */ - map_ptrloc ParentVer; // Version + map_pointer_t ParentVer; // Version /** \brief unique sequel ID */ - map_ptrloc ID; + map_id_t ID; /** \brief Dependency type - Depends, Recommends, Conflicts, etc */ unsigned char Type; /** \brief comparison operator specified on the depends line @@ -629,39 +639,21 @@ struct pkgCache::Dependency struct pkgCache::Provides { /** \brief index of the package providing this */ - map_ptrloc ParentPkg; // Package + map_pointer_t ParentPkg; // Package /** \brief index of the version this provide line applies to */ - map_ptrloc Version; // Version + map_pointer_t Version; // Version /** \brief version in the provides line (if any) This version allows dependencies to depend on specific versions of a Provides, as well as allowing Provides to override existing packages. This is experimental. Note that Debian doesn't allow versioned provides */ - map_ptrloc ProvideVersion; // StringItem + map_stringitem_t ProvideVersion; /** \brief next provides (based of package) */ - map_ptrloc NextProvides; // Provides + map_pointer_t NextProvides; // Provides /** \brief next provides (based of version) */ - map_ptrloc NextPkgProv; // Provides + map_pointer_t NextPkgProv; // Provides }; /*}}}*/ -// StringItem structure /*{{{*/ -/** \brief used for generating single instances of strings - - Some things like Section Name are are useful to have as unique tags. - It is part of a linked list based at pkgCache::Header::StringList - - All strings are simply inlined any place in the file that is natural - for the writer. The client should make no assumptions about the positioning - of strings. All StringItems should be null-terminated. */ -struct pkgCache::StringItem -{ - /** \brief string this refers to */ - map_ptrloc String; // StringItem - /** \brief Next link in the chain */ - map_ptrloc NextItem; // StringItem -}; - /*}}}*/ - inline char const * pkgCache::NativeArch() { return StrP + HeaderP->Architecture; } |