ldid.hpp

   1 #ifndef LDID_HPP
   2 #define LDID_HPP
   3
   4 #include <cstdlib>
   5 #include <map>
   6 #include <set>
   7 #include <sstream>
   8 #include <streambuf>
   9 #include <string>
  10 #include <vector>
  11
  12 namespace ldid {
  13
  14 // I wish Apple cared about providing quality toolchains :/
  15
  16 template <typename Function_>
  17 class Functor;
  18
  19 template <typename Type_, typename... Args_>
  20 class Functor<Type_ (Args_...)> {
  21   public:
  22     virtual Type_ operator ()(Args_... args) const = 0;
  23 };
  24
  25 template <typename Function_>
  26 class FunctorImpl;
  27
  28 template <typename Value_, typename Type_, typename... Args_>
  29 class FunctorImpl<Type_ (Value_::*)(Args_...) const> :
  30     public Functor<Type_ (Args_...)>
  31 {
  32   private:
  33     const Value_ *value_;
  34
  35   public:
  36     FunctorImpl(const Value_ &value) :
  37         value_(&value)
  38     {
  39     }
  40
  41     virtual Type_ operator ()(Args_... args) const {
  42         return (*value_)(args...);
  43     }
  44 };
  45
  46 template <typename Function_>
  47 FunctorImpl<decltype(&Function_::operator())> fun(const Function_ &value) {
  48     return value;
  49 }
  50
  51 class Folder {
  52   public:
  53     virtual void Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) = 0;
  54     virtual bool Look(const std::string &path) const = 0;
  55     virtual void Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) const = 0;
  56     virtual void Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const = 0;
  57 };
  58
  59 class DiskFolder :
  60     public Folder
  61 {
  62   private:
  63     const std::string path_;
  64     std::map<std::string, std::string> commit_;
  65
  66     std::string Path(const std::string &path) const;
  67
  68     void Find(const std::string &root, const std::string &base, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const;
  69
  70   public:
  71     DiskFolder(const std::string &path);
  72     ~DiskFolder();
  73
  74     virtual void Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code);
  75     virtual bool Look(const std::string &path) const;
  76     virtual void Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) const;
  77     virtual void Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const;
  78 };
  79
  80 class SubFolder :
  81     public Folder
  82 {
  83   private:
  84     Folder &parent_;
  85     std::string path_;
  86
  87   public:
  88     SubFolder(Folder &parent, const std::string &path);
  89
  90     virtual void Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code);
  91     virtual bool Look(const std::string &path) const;
  92     virtual void Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) const;
  93     virtual void Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const;
  94 };
  95
  96 class UnionFolder :
  97     public Folder
  98 {
  99   private:
 100     class StringBuffer :
 101         public std::stringbuf
 102     {
 103       public:
 104         StringBuffer() {
 105         }
 106
 107         StringBuffer(const StringBuffer &rhs) :
 108             std::stringbuf(rhs.str())
 109         {
 110         }
 111     };
 112
 113     Folder &parent_;
 114     std::set<std::string> deletes_;
 115
 116     std::map<std::string, std::string> remaps_;
 117     mutable std::map<std::string, std::pair<StringBuffer, const void *>> resets_;
 118
 119     std::string Map(const std::string &path) const;
 120     void Map(const std::string &path, const Functor<void (const std::string &)> &code, const std::string &file, const Functor<void (const Functor<void (std::streambuf &, const void *)> &)> &save) const;
 121
 122   public:
 123     UnionFolder(Folder &parent);
 124
 125     virtual void Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code);
 126     virtual bool Look(const std::string &path) const;
 127     virtual void Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) const;
 128     virtual void Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const;
 129
 130     void operator ()(const std::string &from) {
 131         deletes_.insert(from);
 132     }
 133
 134     void operator ()(const std::string &from, const std::string &to) {
 135         operator ()(from);
 136         remaps_[to] = from;
 137     }
 138
 139     std::stringbuf &operator ()(const std::string &from, const void *flag) {
 140         operator ()(from);
 141         auto &reset(resets_[from]);
 142         reset.second = flag;
 143         return reset.first;
 144     }
 145 };
 146
 147 struct Bundle {
 148     std::string path;
 149     std::vector<char> hash;
 150 };
 151
 152 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, const std::string &requirement, const Functor<std::string (const std::string &, const std::string &)> &alter);
 153
 154 typedef std::map<uint32_t, std::vector<char>> Slots;
 155
 156 std::vector<char> Sign(const void *idata, size_t isize, std::streambuf &output, const std::string &identifier, const std::string &entitlements, const std::string &requirement, const std::string &key, const Slots &slots);
 157
 158 }
 159
 160 #endif//LDID_HPP