rred: If there were I/O errors, fail

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

diff --git a/apt-pkg/pkgcache.h b/apt-pkg/pkgcache.h
index f72dd30b0b1e9a3491add26e4b6935ad9ccf6c4a..91228f7133ac4196571e97ee690c568b57b92dd1 100644 (file)
--- a/apt-pkg/pkgcache.h
+++ b/apt-pkg/pkgcache.h
@@ -81,6 +81,10 @@
 #include <time.h>
 #include <stdint.h>
 
+#ifdef APT_PKG_EXPOSE_STRING_VIEW
+#include <apt-pkg/string_view.h>
+#endif
+
 #ifndef APT_8_CLEANER_HEADERS
 using std::string;
 #endif
@@ -193,7 +197,9 @@ class pkgCache                                                              /*{{{*/
    // Memory mapped cache file
    std::string CacheFile;
    MMap &Map;
-
+#ifdef APT_PKG_EXPOSE_STRING_VIEW
+   APT_HIDDEN map_id_t sHash(APT::StringView S) const APT_PURE;
+#endif
    map_id_t sHash(const std::string &S) const APT_PURE;
    map_id_t sHash(const char *S) const APT_PURE;
    
@@ -212,7 +218,7 @@ class pkgCache                                                              /*{{{*/
    Provides *ProvideP;
    Dependency *DepP;
    DependencyData *DepDataP;
-   APT_DEPRECATED StringItem *StringItemP;
+   APT_DEPRECATED_MSG("Not used anymore in cache generation and without a replacement") StringItem *StringItemP;
    char *StrP;
 
    virtual bool ReMap(bool const &Errorchecks = true);
@@ -221,13 +227,34 @@ class pkgCache                                                            /*{{{*/
    inline void *DataEnd() {return ((unsigned char *)Map.Data()) + Map.Size();}
       
    // String hashing function (512 range)
+#ifdef APT_PKG_EXPOSE_STRING_VIEW
+   APT_HIDDEN inline map_id_t Hash(APT::StringView S) const {return sHash(S);}
+#endif
    inline map_id_t Hash(const std::string &S) const {return sHash(S);}
    inline map_id_t Hash(const char *S) const {return sHash(S);}
 
+   APT_HIDDEN uint32_t CacheHash();
+
    // Useful transformation things
    static const char *Priority(unsigned char Priority);
    
    // Accessors
+#ifdef APT_PKG_EXPOSE_STRING_VIEW
+   APT_HIDDEN GrpIterator FindGrp(APT::StringView Name);
+   APT_HIDDEN PkgIterator FindPkg(APT::StringView Name);
+   APT_HIDDEN PkgIterator FindPkg(APT::StringView Name, APT::StringView Arch);
+#endif
+
+#ifdef APT_PKG_EXPOSE_STRING_VIEW
+   APT::StringView ViewString(map_stringitem_t idx) const
+   {
+      char *name = StrP + idx;
+      uint16_t len = *reinterpret_cast<const uint16_t*>(name - sizeof(uint16_t));
+      return APT::StringView(name, len);
+   }
+#endif
+
+
    GrpIterator FindGrp(const std::string &Name);
    PkgIterator FindPkg(const std::string &Name);
    PkgIterator FindPkg(const std::string &Name, const std::string &Arch);
@@ -364,7 +391,7 @@ struct pkgCache::Header
    map_pointer_t * PkgHashTableP() const { return (map_pointer_t*) (this + 1); }
    map_pointer_t * GrpHashTableP() const { return PkgHashTableP() + GetHashTableSize(); }
 
-   /** \brief Size of the complete cache file */
+   /** \brief Hash of the file (TODO: Rename) */
    map_filesize_small_t CacheFileSize;
 
    bool CheckSizes(Header &Against) const APT_PURE;
@@ -413,7 +440,7 @@ struct pkgCache::Package
     * Note that the access method Name() will remain. It is just this data member
     * deprecated as this information is already stored and available via the
     * associated Group – so it is wasting precious binary cache space */
-   APT_DEPRECATED map_stringitem_t Name;
+   APT_DEPRECATED_MSG("Use the .Name() method instead of accessing the member directly") map_stringitem_t Name;
    /** \brief Architecture of the package */
    map_stringitem_t Arch;
    /** \brief Base of a singly linked list of versions
@@ -602,7 +629,7 @@ struct pkgCache::Version
                       AllAllowed = All | Allowed };
 
    /** \brief deprecated variant of No */
-   static const APT_DEPRECATED VerMultiArch None = No;
+   static const APT_DEPRECATED_MSG("The default value of the Multi-Arch field is no, not none") VerMultiArch None = No;
 
    /** \brief stores the MultiArch capabilities of this version
 
@@ -742,7 +769,7 @@ struct pkgCache::Provides
 };
                                                                        /*}}}*/
 // UNUSED StringItem structure                                         /*{{{*/
-struct APT_DEPRECATED  pkgCache::StringItem
+struct APT_DEPRECATED_MSG("No longer used in cache generation without a replacement") pkgCache::StringItem
 {
    /** \brief string this refers to */
    map_ptrloc String;        // StringItem