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//===-- runtime/environment.cpp -------------------------------------------===//
//
// 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 "environment-default-list.h"
#include "memory.h"
#include "tools.h"
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <limits>
#ifdef _WIN32
extern char **_environ;
#else
extern char **environ;
#endif
namespace Fortran::runtime {
#ifndef FLANG_RUNTIME_NO_GLOBAL_VAR_DEFS
RT_OFFLOAD_VAR_GROUP_BEGIN
RT_VAR_ATTRS ExecutionEnvironment executionEnvironment;
RT_OFFLOAD_VAR_GROUP_END
#endif // FLANG_RUNTIME_NO_GLOBAL_VAR_DEFS
static void SetEnvironmentDefaults(const EnvironmentDefaultList *envDefaults) {
if (!envDefaults) {
return;
}
for (int itemIndex = 0; itemIndex < envDefaults->numItems; ++itemIndex) {
const char *name = envDefaults->item[itemIndex].name;
const char *value = envDefaults->item[itemIndex].value;
#ifdef _WIN32
if (auto *x{std::getenv(name)}) {
continue;
}
if (_putenv_s(name, value) != 0) {
#else
if (setenv(name, value, /*overwrite=*/0) == -1) {
#endif
Fortran::runtime::Terminator{__FILE__, __LINE__}.Crash(
std::strerror(errno));
}
}
}
RT_OFFLOAD_API_GROUP_BEGIN
Fortran::common::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 Fortran::common::nullopt;
}
}
RT_OFFLOAD_API_GROUP_END
void ExecutionEnvironment::Configure(int ac, const char *av[],
const char *env[], const EnvironmentDefaultList *envDefaults) {
argc = ac;
argv = av;
SetEnvironmentDefaults(envDefaults);
#ifdef _WIN32
envp = _environ;
#else
envp = environ;
#endif
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);
}
}
if (auto *x{std::getenv("NO_STOP_MESSAGE")}) {
char *end;
auto n{std::strtol(x, &end, 10)};
if (n >= 0 && n <= 1 && *end == '\0') {
noStopMessage = n != 0;
} else {
std::fprintf(stderr,
"Fortran runtime: NO_STOP_MESSAGE=%s is invalid; ignored\n", x);
}
}
if (auto *x{std::getenv("DEFAULT_UTF8")}) {
char *end;
auto n{std::strtol(x, &end, 10)};
if (n >= 0 && n <= 1 && *end == '\0') {
defaultUTF8 = n != 0;
} else {
std::fprintf(
stderr, "Fortran runtime: DEFAULT_UTF8=%s is invalid; ignored\n", x);
}
}
if (auto *x{std::getenv("FORT_CHECK_POINTER_DEALLOCATION")}) {
char *end;
auto n{std::strtol(x, &end, 10)};
if (n >= 0 && n <= 1 && *end == '\0') {
checkPointerDeallocation = n != 0;
} else {
std::fprintf(stderr,
"Fortran runtime: FORT_CHECK_POINTER_DEALLOCATION=%s is invalid; "
"ignored\n",
x);
}
}
// TODO: Set RP/ROUND='PROCESSOR_DEFINED' from environment
}
const char *ExecutionEnvironment::GetEnv(
const char *name, std::size_t name_length, const Terminator &terminator) {
RUNTIME_CHECK(terminator, name && name_length);
OwningPtr<char> cStyleName{
SaveDefaultCharacter(name, name_length, terminator)};
RUNTIME_CHECK(terminator, cStyleName);
return std::getenv(cStyleName.get());
}
} // namespace Fortran::runtime
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