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apt 3.0.3
commandline package manager
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Public Member Functions | |
| uint32_t | GetHashTableSize () const |
| void | SetHashTableSize (unsigned int const sz) |
| map_stringitem_t | GetArchitectures () const |
| void | SetArchitectures (map_stringitem_t const idx) |
| bool | CheckSizes (Header &Against) const APT_PURE |
Public Attributes | |
| uint32_t | Signature |
| Signature information. | |
| map_number_t | MajorVersion |
| map_number_t | MinorVersion |
| bool | Dirty |
| indicates if the cache should be erased | |
| uint16_t | HeaderSz |
| Size of structure values. | |
| map_number_t | GroupSz |
| map_number_t | PackageSz |
| map_number_t | ReleaseFileSz |
| map_number_t | PackageFileSz |
| map_number_t | VersionSz |
| map_number_t | SourceVersionSz |
| map_number_t | DescriptionSz |
| map_number_t | DependencySz |
| map_number_t | DependencyDataSz |
| map_number_t | ProvidesSz |
| map_number_t | VerFileSz |
| map_number_t | DescFileSz |
| map_id_t | GroupCount |
| Structure counts. | |
| map_id_t | PackageCount |
| map_id_t | VersionCount |
| map_id_t | SourceVersionCount |
| map_id_t | DescriptionCount |
| map_id_t | DependsCount |
| map_id_t | DependsDataCount |
| map_fileid_t | ReleaseFileCount |
| map_fileid_t | PackageFileCount |
| map_id_t | VerFileCount |
| map_id_t | DescFileCount |
| map_id_t | ProvidesCount |
| map_pointer< PackageFile > | FileList |
| index of the first PackageFile structure | |
| map_pointer< ReleaseFile > | RlsFileList |
| index of the first ReleaseFile structure | |
| map_stringitem_t | VerSysName |
| String representing the version system used. | |
| map_stringitem_t | Architecture |
| native architecture the cache was built against | |
| map_stringitem_t | Architectures |
| all architectures the cache was built against | |
| map_filesize_t | MaxVerFileSize |
| The maximum size of a raw entry from the original Package file. | |
| map_filesize_t | MaxDescFileSize |
| The maximum size of a raw entry from the original Translation file. | |
| DynamicMMap::Pool | Pools [2 *13] |
| The Pool structures manage the allocation pools that the generator uses. | |
| uint32_t | HashTableSize |
| hash tables providing rapid group/package name lookup | |
| map_filesize_small_t | CacheFileSize |
| Hash of the file (TODO: Rename) | |
| bool Dirty |
indicates if the cache should be erased
Dirty is true if the cache file was opened for reading, the client expects to have written things to it and have not fully synced it. The file should be erased and rebuilt if it is true.
| map_pointer<PackageFile> FileList |
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_id_t GroupCount |
Structure counts.
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.
| uint32_t HashTableSize |
hash tables providing rapid group/package name lookup
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. The size of both tables is the same.
| uint16_t HeaderSz |
Size of structure values.
All *Sz variables contains the sizeof() that particular structure. It is used as an extra consistency check on the structure of the file.
If any of the size values do not exactly match what the client expects then the client should refuse the load the file.
| map_number_t MajorVersion |
These contain the version of the cache file
| DynamicMMap::Pool Pools[2 *13] |
The Pool structures manage the allocation pools that the generator uses.
Start indicates the first byte of the pool, Count is the number of objects remaining in the pool and ItemSize is the structure size (alignment factor) of the pool. An ItemSize of 0 indicates the pool is empty. There should be twice the number of pools as there are non-private structure types. The generator stores this information so future additions can make use of any unused pool blocks.
| uint32_t Signature |
Signature information.
This must contain the hex value 0x98FE76DC which is designed to verify that the system loading the image has the same byte order and byte size as the system saving the image
1.9.8