forked from OSchip/llvm-project
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
//===--- MemIndex.cpp - Dynamic in-memory symbol index. ----------*- C++-*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===-------------------------------------------------------------------===//
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#include "MemIndex.h"
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#include "FuzzyMatch.h"
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#include "Logger.h"
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#include "Quality.h"
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#include "Trace.h"
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using namespace llvm;
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namespace clang {
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namespace clangd {
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std::unique_ptr<SymbolIndex> MemIndex::build(SymbolSlab Slab, RefSlab Refs) {
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// Store Slab size before it is moved.
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const auto BackingDataSize = Slab.bytes() + Refs.bytes();
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auto Data = std::make_pair(std::move(Slab), std::move(Refs));
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return llvm::make_unique<MemIndex>(Data.first, Data.second, std::move(Data),
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BackingDataSize);
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}
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bool MemIndex::fuzzyFind(const FuzzyFindRequest &Req,
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function_ref<void(const Symbol &)> Callback) const {
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assert(!StringRef(Req.Query).contains("::") &&
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"There must be no :: in query.");
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trace::Span Tracer("MemIndex fuzzyFind");
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TopN<std::pair<float, const Symbol *>> Top(
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Req.Limit ? *Req.Limit : std::numeric_limits<size_t>::max());
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FuzzyMatcher Filter(Req.Query);
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bool More = false;
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for (const auto Pair : Index) {
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const Symbol *Sym = Pair.second;
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// Exact match against all possible scopes.
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if (!Req.AnyScope && !is_contained(Req.Scopes, Sym->Scope))
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continue;
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if (Req.RestrictForCodeCompletion &&
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!(Sym->Flags & Symbol::IndexedForCodeCompletion))
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continue;
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if (auto Score = Filter.match(Sym->Name))
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if (Top.push({*Score * quality(*Sym), Sym}))
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More = true; // An element with smallest score was discarded.
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}
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auto Results = std::move(Top).items();
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SPAN_ATTACH(Tracer, "results", static_cast<int>(Results.size()));
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for (const auto &Item : Results)
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Callback(*Item.second);
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return More;
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}
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void MemIndex::lookup(const LookupRequest &Req,
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function_ref<void(const Symbol &)> Callback) const {
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trace::Span Tracer("MemIndex lookup");
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for (const auto &ID : Req.IDs) {
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auto I = Index.find(ID);
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if (I != Index.end())
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Callback(*I->second);
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}
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}
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void MemIndex::refs(const RefsRequest &Req,
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function_ref<void(const Ref &)> Callback) const {
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trace::Span Tracer("MemIndex refs");
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for (const auto &ReqID : Req.IDs) {
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auto SymRefs = Refs.find(ReqID);
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if (SymRefs == Refs.end())
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continue;
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for (const auto &O : SymRefs->second)
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if (static_cast<int>(Req.Filter & O.Kind))
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Callback(O);
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}
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}
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size_t MemIndex::estimateMemoryUsage() const {
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return Index.getMemorySize() + Refs.getMemorySize() + BackingDataSize;
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}
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} // namespace clangd
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} // namespace clang
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