| 1 | //===-- runtime/environment.h -----------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef FORTRAN_RUNTIME_ENVIRONMENT_H_ |
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| 10 | #define FORTRAN_RUNTIME_ENVIRONMENT_H_ |
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| 11 | |
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| 12 | #include "flang/Decimal/decimal.h" |
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| 13 | #include <optional> |
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| 14 | |
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| 15 | struct EnvironmentDefaultList; |
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| 16 | |
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| 17 | namespace Fortran::runtime { |
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| 18 | |
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| 19 | class Terminator; |
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| 20 | |
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| 21 | #if FLANG_BIG_ENDIAN |
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| 22 | constexpr bool isHostLittleEndian{false}; |
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| 23 | #elif FLANG_LITTLE_ENDIAN |
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| 24 | constexpr bool isHostLittleEndian{true}; |
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| 25 | #else |
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| 26 | #error host endianness is not known |
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| 27 | #endif |
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| 28 | |
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| 29 | // External unformatted I/O data conversions |
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| 30 | enum class Convert { Unknown, Native, LittleEndian, BigEndian, Swap }; |
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| 31 | |
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| 32 | std::optional<Convert> GetConvertFromString(const char *, std::size_t); |
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| 33 | |
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| 34 | struct ExecutionEnvironment { |
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| 35 | constexpr ExecutionEnvironment(){}; |
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| 36 | void Configure(int argc, const char *argv[], const char *envp[], |
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| 37 | const EnvironmentDefaultList *envDefaults); |
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| 38 | const char *GetEnv( |
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| 39 | const char *name, std::size_t name_length, const Terminator &terminator); |
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| 40 | |
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| 41 | int argc{0}; |
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| 42 | const char **argv{nullptr}; |
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| 43 | char **envp{nullptr}; |
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| 44 | |
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| 45 | int listDirectedOutputLineLengthLimit{79}; // FORT_FMT_RECL |
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| 46 | enum decimal::FortranRounding defaultOutputRoundingMode{ |
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| 47 | decimal::FortranRounding::RoundNearest}; // RP(==PN) |
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| 48 | Convert conversion{Convert::Unknown}; // FORT_CONVERT |
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| 49 | bool noStopMessage{false}; // NO_STOP_MESSAGE=1 inhibits "Fortran STOP" |
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| 50 | bool defaultUTF8{false}; // DEFAULT_UTF8 |
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| 51 | }; |
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| 52 | |
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| 53 | extern ExecutionEnvironment executionEnvironment; |
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| 54 | } // namespace Fortran::runtime |
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| 55 | |
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| 56 | #endif // FORTRAN_RUNTIME_ENVIRONMENT_H_ |
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| 57 | |
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