+ // check the historie and see what patches we need
+ string const history = Tags.FindS("SHA1-History");
+ std::stringstream hist(history);
+ while(hist >> d.sha1 >> size >> d.file)
+ {
+ // read until the first match is found
+ // from that point on, we probably need all diffs
+ if(d.sha1 == local_sha1)
+ found=true;
+ else if (found == false)
+ continue;
+
+ if(Debug)
+ std::clog << "Need to get diff: " << d.file << std::endl;
+ available_patches.push_back(d);
+ }
+
+ if (available_patches.empty() == false)
+ {
+ // patching with too many files is rather slow compared to a fast download
+ unsigned long const fileLimit = _config->FindI("Acquire::PDiffs::FileLimit", 0);
+ if (fileLimit != 0 && fileLimit < available_patches.size())
+ {
+ if (Debug)
+ std::clog << "Need " << available_patches.size() << " diffs (Limit is " << fileLimit
+ << ") so fallback to complete download" << std::endl;
+ return false;
+ }
+
+ // see if the patches are too big
+ found = false; // it was true and it will be true again at the end
+ d = *available_patches.begin();
+ string const firstPatch = d.file;
+ unsigned long patchesSize = 0;
+ std::stringstream patches(Tags.FindS("SHA1-Patches"));
+ while(patches >> d.sha1 >> size >> d.file)
+ {
+ if (firstPatch == d.file)
+ found = true;
+ else if (found == false)
+ continue;
+
+ patchesSize += atol(size.c_str());
+ }
+ unsigned long const sizeLimit = ServerSize * _config->FindI("Acquire::PDiffs::SizeLimit", 100);
+ if (sizeLimit > 0 && (sizeLimit/100) < patchesSize)
+ {
+ if (Debug)
+ std::clog << "Need " << patchesSize << " bytes (Limit is " << sizeLimit/100
+ << ") so fallback to complete download" << std::endl;
+ return false;
+ }
+ }
+ }
+
+ // we have something, queue the next diff
+ if(found)
+ {
+ // queue the diffs
+ string::size_type const last_space = Description.rfind(" ");
+ if(last_space != string::npos)
+ Description.erase(last_space, Description.size()-last_space);
+ new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
+ ExpectedHash, ServerSha1, available_patches);
+ Complete = false;
+ Status = StatDone;
+ Dequeue();
+ return true;
+ }
+ }
+
+ // Nothing found, report and return false
+ // Failing here is ok, if we return false later, the full
+ // IndexFile is queued
+ if(Debug)
+ std::clog << "Can't find a patch in the index file" << std::endl;
+ return false;
+}
+ /*}}}*/
+void pkgAcqDiffIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
projects / apt.git / blobdiff