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//===--- MemIndex.cpp - Dynamic in-memory symbol index. ----------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===-------------------------------------------------------------------===//
#include "MemIndex.h"
#include "FuzzyMatch.h"
#include "Logger.h"
#include "Quality.h"
#include "Trace.h"
namespace clang {
namespace clangd {
std::unique_ptr<SymbolIndex> MemIndex::build(SymbolSlab Slab, RefSlab Refs) {
// Store Slab size before it is moved.
const auto BackingDataSize = Slab.bytes() + Refs.bytes();
auto Data = std::make_pair(std::move(Slab), std::move(Refs));
return llvm::make_unique<MemIndex>(Data.first, Data.second, std::move(Data),
BackingDataSize);
}
bool MemIndex::fuzzyFind(
const FuzzyFindRequest &Req,
llvm::function_ref<void(const Symbol &)> Callback) const {
assert(!StringRef(Req.Query).contains("::") &&
"There must be no :: in query.");
trace::Span Tracer("MemIndex fuzzyFind");
TopN<std::pair<float, const Symbol *>> Top(
Req.Limit ? *Req.Limit : std::numeric_limits<size_t>::max());
FuzzyMatcher Filter(Req.Query);
bool More = false;
for (const auto Pair : Index) {
const Symbol *Sym = Pair.second;
// Exact match against all possible scopes.
if (!Req.AnyScope && !llvm::is_contained(Req.Scopes, Sym->Scope))
continue;
if (Req.RestrictForCodeCompletion &&
!(Sym->Flags & Symbol::IndexedForCodeCompletion))
continue;
if (auto Score = Filter.match(Sym->Name))
if (Top.push({*Score * quality(*Sym), Sym}))
More = true; // An element with smallest score was discarded.
}
auto Results = std::move(Top).items();
SPAN_ATTACH(Tracer, "results", static_cast<int>(Results.size()));
for (const auto &Item : Results)
Callback(*Item.second);
return More;
}
void MemIndex::lookup(const LookupRequest &Req,
llvm::function_ref<void(const Symbol &)> Callback) const {
trace::Span Tracer("MemIndex lookup");
for (const auto &ID : Req.IDs) {
auto I = Index.find(ID);
if (I != Index.end())
Callback(*I->second);
}
}
void MemIndex::refs(const RefsRequest &Req,
llvm::function_ref<void(const Ref &)> Callback) const {
trace::Span Tracer("MemIndex refs");
uint32_t Remaining =
Req.Limit.getValueOr(std::numeric_limits<uint32_t>::max());
for (const auto &ReqID : Req.IDs) {
auto SymRefs = Refs.find(ReqID);
if (SymRefs == Refs.end())
continue;
for (const auto &O : SymRefs->second) {
if (Remaining > 0 && static_cast<int>(Req.Filter & O.Kind)) {
--Remaining;
Callback(O);
}
}
}
}
size_t MemIndex::estimateMemoryUsage() const {
return Index.getMemorySize() + Refs.getMemorySize() + BackingDataSize;
}
} // namespace clangd
} // namespace clang
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