| //===-- runtime/environment.cpp ---------------------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "environment.h" |
| #include "tools.h" |
| #include <cstdio> |
| #include <cstdlib> |
| #include <cstring> |
| #include <limits> |
| |
| namespace Fortran::runtime { |
| |
| ExecutionEnvironment executionEnvironment; |
| |
| std::optional<Convert> GetConvertFromString(const char *x, std::size_t n) { |
| static const char *keywords[]{ |
| "UNKNOWN", "NATIVE", "LITTLE_ENDIAN", "BIG_ENDIAN", "SWAP", nullptr}; |
| switch (IdentifyValue(x, n, keywords)) { |
| case 0: |
| return Convert::Unknown; |
| case 1: |
| return Convert::Native; |
| case 2: |
| return Convert::LittleEndian; |
| case 3: |
| return Convert::BigEndian; |
| case 4: |
| return Convert::Swap; |
| default: |
| return std::nullopt; |
| } |
| } |
| |
| void ExecutionEnvironment::Configure( |
| int ac, const char *av[], const char *env[]) { |
| argc = ac; |
| argv = av; |
| envp = env; |
| listDirectedOutputLineLengthLimit = 79; // PGI default |
| defaultOutputRoundingMode = |
| decimal::FortranRounding::RoundNearest; // RP(==RN) |
| conversion = Convert::Unknown; |
| |
| if (auto *x{std::getenv("FORT_FMT_RECL")}) { |
| char *end; |
| auto n{std::strtol(x, &end, 10)}; |
| if (n > 0 && n < std::numeric_limits<int>::max() && *end == '\0') { |
| listDirectedOutputLineLengthLimit = n; |
| } else { |
| std::fprintf( |
| stderr, "Fortran runtime: FORT_FMT_RECL=%s is invalid; ignored\n", x); |
| } |
| } |
| |
| if (auto *x{std::getenv("FORT_CONVERT")}) { |
| if (auto convert{GetConvertFromString(x, std::strlen(x))}) { |
| conversion = *convert; |
| } else { |
| std::fprintf( |
| stderr, "Fortran runtime: FORT_CONVERT=%s is invalid; ignored\n", x); |
| } |
| } |
| |
| // TODO: Set RP/ROUND='PROCESSOR_DEFINED' from environment |
| } |
| } // namespace Fortran::runtime |