#include <vector>
#include <string>
#include <sys/stat.h>
+#include <zlib.h>
#include <apti18n.h>
/*}}}*/
using std::string;
+using APT::StringView;
// Cache::Header::Header - Constructor /*{{{*/
/* 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, 2);
+ APT_HEADER_SET(MinorVersion, 5);
APT_HEADER_SET(Dirty, false);
APT_HEADER_SET(HeaderSz, sizeof(pkgCache::Header));
VerSysName = 0;
Architecture = 0;
SetArchitectures(0);
- SetHashTableSize(_config->FindI("APT::Cache-HashTableSize", 10 * 1048));
+ SetHashTableSize(_config->FindI("APT::Cache-HashTableSize", 50503));
memset(Pools,0,sizeof(Pools));
CacheFileSize = 0;
HeaderP->CheckSizes(DefHeader) == false)
return _error->Error(_("The package cache file is an incompatible version"));
- if (Map.Size() < HeaderP->CacheFileSize)
- return _error->Error(_("The package cache file is corrupted, it is too small"));
-
if (HeaderP->VerSysName == 0 || HeaderP->Architecture == 0 || HeaderP->GetArchitectures() == 0)
return _error->Error(_("The package cache file is corrupted"));
list != StrP + HeaderP->GetArchitectures())
return _error->Error(_("The package cache was built for different architectures: %s vs %s"), StrP + HeaderP->GetArchitectures(), list.c_str());
+
+ auto hash = CacheHash();
+ if (_config->FindB("Debug::pkgCacheGen", false))
+ std::clog << "Opened cache with hash " << hash << ", expecting " << HeaderP->CacheFileSize << "\n";
+ if (hash != HeaderP->CacheFileSize)
+ return _error->Error(_("The package cache file is corrupted, it has the wrong hash"));
+
return true;
}
/*}}}*/
/* 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 = 0;
+ uint32_t Hash = 5381;
for (string::const_iterator I = Str.begin(); I != Str.end(); ++I)
- Hash = 41 * Hash + tolower_ascii(*I);
+ Hash = 33 * Hash + tolower_ascii((signed char)*I);
return Hash % HeaderP->GetHashTableSize();
}
map_id_t pkgCache::sHash(const char *Str) const
{
- uint32_t Hash = tolower_ascii(*Str);
- for (const char *I = Str + 1; *I != 0; ++I)
- Hash = 41 * Hash + tolower_ascii(*I);
+ uint32_t Hash = 5381;
+ for (const char *I = Str; *I != 0; ++I)
+ Hash = 33 * Hash + tolower_ascii((signed char)*I);
return Hash % HeaderP->GetHashTableSize();
}
+
+uint32_t pkgCache::CacheHash()
+{
+ pkgCache::Header header = {};
+ uLong adler = adler32(0L, Z_NULL, 0);
+
+ if (Map.Size() < sizeof(header))
+ return adler;
+ memcpy(&header, GetMap().Data(), sizeof(header));
+
+ header.Dirty = false;
+ header.CacheFileSize = 0;
+
+ adler = adler32(adler,
+ reinterpret_cast<const unsigned char *>(&header),
+ sizeof(header));
+
+ if (Map.Size() > sizeof(header)) {
+ adler = adler32(adler,
+ static_cast<const unsigned char *>(GetMap().Data()) + sizeof(header),
+ GetMap().Size() - sizeof(header));
+ }
+
+ return adler;
+}
/*}}}*/
// Cache::FindPkg - Locate a package by name /*{{{*/
// ---------------------------------------------------------------------
/* 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.rfind(':');
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") */
// ---------------------------------------------------------------------
/* 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) */
// ---------------------------------------------------------------------
/* 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)
// ---------------------------------------------------------------------
/* 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);
// 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;
// ---------------------------------------------------------------------
/* 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;
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;
projects / apt.git / blobdiff