//===------- Legacy.cpp - Adapters for ExecutionEngine API interop --------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "llvm/ExecutionEngine/Orc/Legacy.h"

namespace llvm {
namespace orc {

JITSymbolResolverAdapter::JITSymbolResolverAdapter(ExecutionSession &ES,
                                                   SymbolResolver &R)
    : ES(ES), R(R) {}

Expected<JITSymbolResolverAdapter::LookupResult>
JITSymbolResolverAdapter::lookup(const LookupSet &Symbols) {
  Error Err = Error::success();
  JITSymbolResolver::LookupResult Result;

  SymbolNameSet InternedSymbols;
  for (auto &S : Symbols)
    InternedSymbols.insert(ES.getSymbolStringPool().intern(S));

  auto OnResolve = [&](Expected<SymbolMap> R) {
    if (R) {
      for (auto &KV : *R) {
        ResolvedStrings.insert(KV.first);
        Result[*KV.first] = KV.second;
      }
    } else
      Err = joinErrors(std::move(Err), R.takeError());
  };

  auto OnReady = [](Error Err) {
    // FIXME: Report error to ExecutionSession.
    logAllUnhandledErrors(std::move(Err), errs(),
                          "legacy resolver received on-ready error:\n");
  };

  AsynchronousSymbolQuery Query(InternedSymbols, OnResolve, OnReady);

  auto UnresolvedSymbols = R.lookup(Query, InternedSymbols);

  if (!UnresolvedSymbols.empty())
    Err = joinErrors(std::move(Err),
                     make_error<StringError>("Unresolved symbols",
                                             inconvertibleErrorCode()));

  if (Err)
    return std::move(Err);

  return Result;
}

Expected<JITSymbolResolverAdapter::LookupFlagsResult>
JITSymbolResolverAdapter::lookupFlags(const LookupSet &Symbols) {
  SymbolNameSet InternedSymbols;
  for (auto &S : Symbols)
    InternedSymbols.insert(ES.getSymbolStringPool().intern(S));

  LookupFlagsResult Result;
  for (auto &KV : R.lookupFlags(InternedSymbols).SymbolFlags) {
    ResolvedStrings.insert(KV.first);
    Result[*KV.first] = KV.second;
  }

  return Result;
}

} // End namespace orc.
} // End namespace llvm.