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

diff --git a/apt-pkg/pkgcache.cc b/apt-pkg/pkgcache.cc
index 3c7fac64217d7282643a2bbd4cf51223b68a916c..d2ecb8b1f394d14f5a44ddd6569a536b95b7cfff 100644 (file)
--- a/apt-pkg/pkgcache.cc
+++ b/apt-pkg/pkgcache.cc
@@ -45,6 +45,7 @@
                                                                        /*}}}*/
 
 using std::string;
+using APT::StringView;
 
 
 // Cache::Header::Header - Constructor                                 /*{{{*/
@@ -58,7 +59,7 @@ pkgCache::Header::Header()
    /* Whenever the structures change the major version should be bumped,
       whenever the generator changes the minor version should be bumped. */
    APT_HEADER_SET(MajorVersion, 10);
-   APT_HEADER_SET(MinorVersion, 3);
+   APT_HEADER_SET(MinorVersion, 4);
    APT_HEADER_SET(Dirty, false);
 
    APT_HEADER_SET(HeaderSz, sizeof(pkgCache::Header));
@@ -206,6 +207,13 @@ bool pkgCache::ReMap(bool const &Errorchecks)
 /* This is used to generate the hash entries for the HashTable. With my
    package list from bo this function gets 94% table usage on a 512 item
    table (480 used items) */
+map_id_t pkgCache::sHash(StringView Str) const
+{
+   uint32_t Hash = 5381;
+   for (auto I = Str.begin(); I != Str.end(); ++I)
+      Hash = 33 * Hash + tolower_ascii(*I);
+   return Hash % HeaderP->GetHashTableSize();
+}
 map_id_t pkgCache::sHash(const string &Str) const
 {
    uint32_t Hash = 5381;
@@ -251,10 +259,14 @@ uint32_t pkgCache::CacheHash()
 // ---------------------------------------------------------------------
 /* Returns 0 on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::FindPkg(const string &Name) {
-       size_t const found = Name.find(':');
+   return FindPkg(StringView(Name));
+}
+
+pkgCache::PkgIterator pkgCache::FindPkg(StringView Name) {
+       auto const found = Name.find(':');
        if (found == string::npos)
           return FindPkg(Name, "native");
-       string const Arch = Name.substr(found+1);
+       auto const Arch = Name.substr(found+1);
        /* Beware: This is specialcased to handle pkg:any in dependencies
           as these are linked to virtual pkg:any named packages.
           If you want any arch from a pkg, use FindPkg(pkg,"any") */
@@ -267,6 +279,10 @@ pkgCache::PkgIterator pkgCache::FindPkg(const string &Name) {
 // ---------------------------------------------------------------------
 /* Returns 0 on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::FindPkg(const string &Name, string const &Arch) {
+   return FindPkg(StringView(Name), StringView(Arch));
+}
+
+pkgCache::PkgIterator pkgCache::FindPkg(StringView Name, StringView Arch) {
        /* We make a detour via the GrpIterator here as
           on a multi-arch environment a group is easier to
           find than a package (less entries in the buckets) */
@@ -281,13 +297,17 @@ pkgCache::PkgIterator pkgCache::FindPkg(const string &Name, string const &Arch)
 // ---------------------------------------------------------------------
 /* Returns End-Pointer on error, pointer to the group otherwise */
 pkgCache::GrpIterator pkgCache::FindGrp(const string &Name) {
+   return FindGrp(StringView(Name));
+}
+
+pkgCache::GrpIterator pkgCache::FindGrp(StringView Name) {
        if (unlikely(Name.empty() == true))
                return GrpIterator(*this,0);
 
        // Look at the hash bucket for the group
        Group *Grp = GrpP + HeaderP->GrpHashTableP()[sHash(Name)];
        for (; Grp != GrpP; Grp = GrpP + Grp->Next) {
-               int const cmp = strcmp(Name.c_str(), StrP + Grp->Name);
+               int const cmp = Name.compare(ViewString(Grp->Name));
                if (cmp == 0)
                        return GrpIterator(*this, Grp);
                else if (cmp < 0)
@@ -350,6 +370,12 @@ const char *pkgCache::Priority(unsigned char Prio)
 // ---------------------------------------------------------------------
 /* Returns an End-Pointer on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(string Arch) const {
+   return FindPkg(StringView(Arch));
+}
+pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(const char *Arch) const {
+   return FindPkg(StringView(Arch));
+}
+pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(StringView Arch) const {
        if (unlikely(IsGood() == false || S->FirstPackage == 0))
                return PkgIterator(*Owner, 0);
 
@@ -363,7 +389,7 @@ pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(string Arch) const {
        // Iterate over the list to find the matching arch
        for (pkgCache::Package *Pkg = PackageList(); Pkg != Owner->PkgP;
             Pkg = Owner->PkgP + Pkg->NextPackage) {
-               if (stringcmp(Arch, Owner->StrP + Pkg->Arch) == 0)
+               if (Arch == Owner->ViewString(Pkg->Arch))
                        return PkgIterator(*Owner, Pkg);
                if ((Owner->PkgP + S->LastPackage) == Pkg)
                        break;
@@ -376,7 +402,7 @@ pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(string Arch) const {
 // ---------------------------------------------------------------------
 /* Returns an End-Pointer on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::GrpIterator::FindPreferredPkg(bool const &PreferNonVirtual) const {
-       pkgCache::PkgIterator Pkg = FindPkg("native");
+       pkgCache::PkgIterator Pkg = FindPkg(StringView("native", 6));
        if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
                return Pkg;
 
@@ -388,7 +414,7 @@ pkgCache::PkgIterator pkgCache::GrpIterator::FindPreferredPkg(bool const &Prefer
                        return Pkg;
        }
        // packages without an architecture
-       Pkg = FindPkg("none");
+       Pkg = FindPkg(StringView("none", 4));
        if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
                return Pkg;