reimplement build-dep via apts normal resolver

[apt.git] / apt-pkg / pkgcachegen.h

diff --git a/apt-pkg/pkgcachegen.h b/apt-pkg/pkgcachegen.h
index 9455f0b7ac5947a42eafe673d2e9ce604d6a39ba..ea288ad6e6ae73922d6b9bd9e33c81a0409d4152 100644 (file)
--- a/apt-pkg/pkgcachegen.h
+++ b/apt-pkg/pkgcachegen.h
@@ -27,7 +27,7 @@
 #include <vector>
 #include <string>
 #if __cplusplus >= 201103L
-#include <unordered_map>
+#include <unordered_set>
 #endif
 #ifdef APT_PKG_EXPOSE_STRING_VIEW
 #include <apt-pkg/string_view.h>
@@ -48,10 +48,34 @@ class APT_HIDDEN pkgCacheGenerator                                  /*{{{*/
 
    // Dirty hack for public users that do not use C++11 yet
 #if __cplusplus >= 201103L
-   std::unordered_map<std::string,map_stringitem_t> strMixed;
-   std::unordered_map<std::string,map_stringitem_t> strSections;
-   std::unordered_map<std::string,map_stringitem_t> strPkgNames;
-   std::unordered_map<std::string,map_stringitem_t> strVersions;
+   struct string_pointer {
+      const char *data_;
+      size_t size;
+      pkgCacheGenerator *generator;
+      map_stringitem_t item;
+
+      const char *data() const {
+        return data_ != nullptr ? data_ : static_cast<char*>(generator->Map.Data()) + item;
+      }
+
+      bool operator ==(string_pointer const &other) const {
+        return size == other.size && memcmp(data(), other.data(), size) == 0;
+      }
+   };
+   struct hash {
+      uint32_t operator()(string_pointer const &that) const {
+        uint32_t Hash = 5381;
+        const char * const end = that.data() + that.size;
+        for (const char *I = that.data(); I != end; ++I)
+           Hash = 33 * Hash + *I;
+        return Hash;
+      }
+   };
+
+   std::unordered_set<string_pointer, hash> strMixed;
+   std::unordered_set<string_pointer, hash> strPkgNames;
+   std::unordered_set<string_pointer, hash> strVersions;
+   std::unordered_set<string_pointer, hash> strSections;
 #endif
 
    friend class pkgCacheListParser;
@@ -104,7 +128,10 @@ class APT_HIDDEN pkgCacheGenerator                                 /*{{{*/
 
    enum StringType { MIXED, PKGNAME, VERSIONNUMBER, SECTION };
    map_stringitem_t StoreString(StringType const type, const char * S, unsigned int const Size);
-   inline map_stringitem_t StoreString(enum StringType const type, const std::string &S) {return StoreString(type, S.c_str(),S.length());};
+
+#ifdef APT_PKG_EXPOSE_STRING_VIEW
+   inline map_stringitem_t StoreString(enum StringType const type, APT::StringView S) {return StoreString(type, S.data(),S.length());};
+#endif
 
    void DropProgress() {Progress = 0;};
    bool SelectFile(const std::string &File,pkgIndexFile const &Index, std::string const &Architecture, std::string const &Component, unsigned long Flags = 0);
@@ -122,7 +149,7 @@ class APT_HIDDEN pkgCacheGenerator                                  /*{{{*/
                        MMap **OutMap,pkgCache **OutCache, bool AllowMem = false);
    APT_PUBLIC static bool MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap);
 
-   void ReMap(void const * const oldMap, void const * const newMap);
+   void ReMap(void const * const oldMap, void const * const newMap, size_t oldSize);
 
    pkgCacheGenerator(DynamicMMap *Map,OpProgress *Progress);
    virtual ~pkgCacheGenerator();
@@ -156,8 +183,10 @@ class APT_HIDDEN pkgCacheListParser
 
    protected:
 
-   inline map_stringitem_t StoreString(pkgCacheGenerator::StringType const type, std::string const &S) {return Owner->StoreString(type, S);};
    inline map_stringitem_t StoreString(pkgCacheGenerator::StringType const type, const char *S,unsigned int Size) {return Owner->StoreString(type, S, Size);};
+#ifdef APT_PKG_EXPOSE_STRING_VIEW
+   inline map_stringitem_t StoreString(pkgCacheGenerator::StringType const type, APT::StringView S) {return Owner->StoreString(type, S);};
+#endif
 
    inline map_stringitem_t WriteString(const std::string &S) {return Owner->WriteStringInMap(S);};
    inline map_stringitem_t WriteString(const char *S,unsigned int Size) {return Owner->WriteStringInMap(S,Size);};