//===-- Program.cpp - Implement OS Program Concept --------------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

//  This file implements the operating system Program concept.

//

//===----------------------------------------------------------------------===//

#include "llvm/Support/Program.h"

#include "llvm/ADT/StringRef.h"

#include "llvm/Config/llvm-config.h"

#include <system_error>

using namespace llvm;

using namespace sys;

//===----------------------------------------------------------------------===//

//=== WARNING: Implementation here must contain only TRULY operating system

//===          independent code.

//===----------------------------------------------------------------------===//

static bool Execute(ProcessInfo &PI, StringRef Program,

                    ArrayRef<StringRef> Args, Optional<ArrayRef<StringRef>> Env,

                    ArrayRef<Optional<StringRef>> Redirects,

                    unsigned MemoryLimit, std::string *ErrMsg);

int sys::ExecuteAndWait(StringRef Program, ArrayRef<StringRef> Args,

                        Optional<ArrayRef<StringRef>> Env,

                        ArrayRef<Optional<StringRef>> Redirects,

                        unsigned SecondsToWait, unsigned MemoryLimit,

                        std::string *ErrMsg, bool *ExecutionFailed) {

  assert(Redirects.empty() || Redirects.size() == 3);

  ProcessInfo PI;

  if (Execute(PI, Program, Args, Env, Redirects, MemoryLimit, ErrMsg)) {

    if (ExecutionFailed)

      *ExecutionFailed = false;

    ProcessInfo Result = Wait(

        PI, SecondsToWait, /*WaitUntilTerminates=*/SecondsToWait == 0, ErrMsg);

    return Result.ReturnCode;

  }

  if (ExecutionFailed)

    *ExecutionFailed = true;

  return -1;

}

ProcessInfo sys::ExecuteNoWait(StringRef Program, ArrayRef<StringRef> Args,

                               Optional<ArrayRef<StringRef>> Env,

                               ArrayRef<Optional<StringRef>> Redirects,

                               unsigned MemoryLimit, std::string *ErrMsg,

                               bool *ExecutionFailed) {

  assert(Redirects.empty() || Redirects.size() == 3);

  ProcessInfo PI;

  if (ExecutionFailed)

    *ExecutionFailed = false;

  if (!Execute(PI, Program, Args, Env, Redirects, MemoryLimit, ErrMsg))

    if (ExecutionFailed)

      *ExecutionFailed = true;

  return PI;

}

bool sys::commandLineFitsWithinSystemLimits(StringRef Program,

                                            ArrayRef<const char *> Args) {

  SmallVector<StringRef, 8> StringRefArgs;

  StringRefArgs.reserve(Args.size());

  for (const char *A : Args)

    StringRefArgs.emplace_back(A);

  return commandLineFitsWithinSystemLimits(Program, StringRefArgs);

}

// Include the platform-specific parts of this class.

#ifdef LLVM_ON_UNIX

#include "Unix/Program.inc"

#endif

#ifdef _WIN32

#include "Windows/Program.inc"

#endif