// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: configuration.h,v 1.16 2002/11/11 06:55:50 doogie Exp $ /* ###################################################################### Configuration Class This class provides a configuration file and command line parser for a tree-oriented configuration environment. All runtime configuration is stored in here. Each configuration name is given as a fully scoped string such as Foo::Bar And has associated with it a text string. The Configuration class only provides storage and lookup for this tree, other classes provide configuration file formats (and parsers/emitters if needed). Most things can get by quite happily with, cout << _config->Find("Foo::Bar") << endl; A special extension, support for ordered lists is provided by using the special syntax, "block::list::" the trailing :: designates the item as a list. To access the list you must use the tree function on "block::list". ##################################################################### */ /*}}}*/ #ifndef PKGLIB_CONFIGURATION_H #define PKGLIB_CONFIGURATION_H #include <regex.h> #include <string> #include <vector> #include <iostream> #include <apt-pkg/macros.h> #ifndef APT_8_CLEANER_HEADERS using std::string; #endif class Configuration { public: struct Item { std::string Value; std::string Tag; Item *Parent; Item *Child; Item *Next; std::string FullTag(const Item *Stop = 0) const; Item() : Parent(0), Child(0), Next(0) {}; }; private: Item *Root; bool ToFree; Item *Lookup(Item *Head,const char *S,unsigned long const &Len,bool const &Create); Item *Lookup(const char *Name,const bool &Create); inline const Item *Lookup(const char *Name) const { return ((Configuration *)this)->Lookup(Name,false); } public: std::string Find(const char *Name,const char *Default = 0) const; std::string Find(std::string const &Name,const char *Default = 0) const {return Find(Name.c_str(),Default);}; std::string Find(std::string const &Name, std::string const &Default) const {return Find(Name.c_str(),Default.c_str());}; std::string FindFile(const char *Name,const char *Default = 0) const; std::string FindDir(const char *Name,const char *Default = 0) const; /** return a list of child options * * Options like Acquire::Languages are handled as lists which * can be overridden and have a default. For the later two a comma * separated list of values is supported. * * \param Name of the parent node * \param Default list of values separated by commas */ std::vector<std::string> FindVector(const char *Name, std::string const &Default = "", bool const Keys = false) const; std::vector<std::string> FindVector(std::string const &Name, std::string const &Default = "", bool const Keys = false) const { return FindVector(Name.c_str(), Default, Keys); }; int FindI(const char *Name,int const &Default = 0) const; int FindI(std::string const &Name,int const &Default = 0) const {return FindI(Name.c_str(),Default);}; bool FindB(const char *Name,bool const &Default = false) const; bool FindB(std::string const &Name,bool const &Default = false) const {return FindB(Name.c_str(),Default);}; std::string FindAny(const char *Name,const char *Default = 0) const; inline void Set(const std::string &Name,const std::string &Value) {Set(Name.c_str(),Value);}; void CndSet(const char *Name,const std::string &Value); void CndSet(const char *Name,const int Value); void Set(const char *Name,const std::string &Value); void Set(const char *Name,const int &Value); inline bool Exists(const std::string &Name) const {return Exists(Name.c_str());}; bool Exists(const char *Name) const; bool ExistsAny(const char *Name) const; void MoveSubTree(char const * const OldRoot, char const * const NewRoot); // clear a whole tree void Clear(const std::string &Name); void Clear(); // remove a certain value from a list (e.g. the list of "APT::Keep-Fds") void Clear(std::string const &List, std::string const &Value); void Clear(std::string const &List, int const &Value); inline const Item *Tree(const char *Name) const {return Lookup(Name);}; inline void Dump() { Dump(std::clog); }; void Dump(std::ostream& str); void Dump(std::ostream& str, char const * const root, char const * const format, bool const emptyValue); Configuration(const Item *Root); Configuration(); ~Configuration(); /** \brief match a string against a configurable list of patterns */ class MatchAgainstConfig { std::vector<regex_t *> patterns; APT_HIDDEN void clearPatterns(); public: MatchAgainstConfig(char const * Config); virtual ~MatchAgainstConfig(); /** \brief Returns \b true for a string matching one of the patterns */ bool Match(char const * str) const; bool Match(std::string const &str) const { return Match(str.c_str()); }; /** \brief returns if the matcher setup was successful */ bool wasConstructedSuccessfully() const { return patterns.empty() == false; } }; }; extern Configuration *_config; bool ReadConfigFile(Configuration &Conf,const std::string &FName, bool const &AsSectional = false, unsigned const &Depth = 0); bool ReadConfigDir(Configuration &Conf,const std::string &Dir, bool const &AsSectional = false, unsigned const &Depth = 0); #endif