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Diffstat (limited to 'apt-pkg/pkgrecords.h')
-rw-r--r-- | apt-pkg/pkgrecords.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/apt-pkg/pkgrecords.h b/apt-pkg/pkgrecords.h new file mode 100644 index 0000000..09c0b5f --- /dev/null +++ b/apt-pkg/pkgrecords.h @@ -0,0 +1,111 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + Package Records - Allows access to complete package description records + directly from the file. + + The package record system abstracts the actual parsing of the + package files. This is different than the generators parser in that + it is used to access information not generate information. No + information touched by the generator should be parable from here as + it can always be retrieved directly from the cache. + + ##################################################################### */ + /*}}}*/ +#ifndef PKGLIB_PKGRECORDS_H +#define PKGLIB_PKGRECORDS_H + +#include <apt-pkg/hashes.h> +#include <apt-pkg/macros.h> +#include <apt-pkg/pkgcache.h> + +#include <string> +#include <vector> + +class APT_PUBLIC pkgRecords /*{{{*/ +{ + public: + class Parser; + + private: + /** \brief dpointer placeholder (for later in case we need it) */ + void * const d; + + pkgCache &Cache; + std::vector<Parser *>Files; + + public: + // Lookup function + Parser &Lookup(pkgCache::VerFileIterator const &Ver); + Parser &Lookup(pkgCache::DescFileIterator const &Desc); + + // Construct destruct + explicit pkgRecords(pkgCache &Cache); + virtual ~pkgRecords(); +}; + /*}}}*/ +class APT_PUBLIC pkgRecords::Parser /*{{{*/ +{ + protected: + + virtual bool Jump(pkgCache::VerFileIterator const &Ver) = 0; + virtual bool Jump(pkgCache::DescFileIterator const &Desc) = 0; + + public: + friend class pkgRecords; + + // These refer to the archive file for the Version + virtual std::string FileName() {return std::string();}; + virtual std::string SourcePkg() {return std::string();}; + virtual std::string SourceVer() {return std::string();}; + + /** return all known hashes in this record. + * + * For authentication proposes packages come with hashsums which + * this method is supposed to parse and return so that clients can + * choose the hash to be used. + */ + virtual HashStringList Hashes() const { return HashStringList(); }; + + // These are some general stats about the package + virtual std::string Maintainer() {return std::string();}; + /** return short description in language from record. + * + * @see #LongDesc + */ + virtual std::string ShortDesc(std::string const &/*lang*/) {return std::string();}; + /** return long description in language from record. + * + * If \b lang is empty the "best" available language will be + * returned as determined by the APT::Languages configuration. + * If a (requested) language can't be found in this record an empty + * string will be returned. + */ + virtual std::string LongDesc(std::string const &/*lang*/) {return std::string();}; + std::string ShortDesc() {return ShortDesc("");}; + std::string LongDesc() {return LongDesc("");}; + + virtual std::string Name() {return std::string();}; + virtual std::string Homepage() {return std::string();} + + // An arbitrary custom field + virtual std::string RecordField(const char * /*fieldName*/) { return std::string();}; + + // The record in binary form + virtual void GetRec(const char *&Start,const char *&Stop) {Start = Stop = 0;}; + + Parser(); + virtual ~Parser(); + + private: + void * const d; + APT_HIDDEN std::string GetHashFromHashes(char const * const type) const + { + HashStringList const hashes = Hashes(); + HashString const * const hs = hashes.find(type); + return hs != NULL ? hs->HashValue() : ""; + }; +}; + /*}}}*/ +#endif |