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//===-- runtime/environment.h -----------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef FORTRAN_RUNTIME_ENVIRONMENT_H_
#define FORTRAN_RUNTIME_ENVIRONMENT_H_
#include "flang/Decimal/decimal.h"
#include <optional>
namespace Fortran::runtime {
class Terminator;
#if FLANG_BIG_ENDIAN
constexpr bool isHostLittleEndian{false};
#elif FLANG_LITTLE_ENDIAN
constexpr bool isHostLittleEndian{true};
#else
#error host endianness is not known
#endif
// External unformatted I/O data conversions
enum class Convert { Unknown, Native, LittleEndian, BigEndian, Swap };
std::optional<Convert> GetConvertFromString(const char *, std::size_t);
struct ExecutionEnvironment {
constexpr ExecutionEnvironment(){};
void Configure(int argc, const char *argv[], const char *envp[]);
const char *GetEnv(
const char *name, std::size_t name_length, const Terminator &terminator);
int argc{0};
const char **argv{nullptr};
const char **envp{nullptr};
int listDirectedOutputLineLengthLimit{79}; // FORT_FMT_RECL
enum decimal::FortranRounding defaultOutputRoundingMode{
decimal::FortranRounding::RoundNearest}; // RP(==PN)
Convert conversion{Convert::Unknown}; // FORT_CONVERT
bool noStopMessage{false}; // NO_STOP_MESSAGE=1 inhibits "Fortran STOP"
bool defaultUTF8{false}; // DEFAULT_UTF8
};
extern ExecutionEnvironment executionEnvironment;
} // namespace Fortran::runtime
#endif // FORTRAN_RUNTIME_ENVIRONMENT_H_
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