Files
clang-p2996/flang-rt/examples/ExternalHelloWorld/external-hello.cpp
Michael Kruse 54f37133b7 [Flang][NFC] Move runtime library files to flang-rt (#110298)
Mostly mechanical changes in preparation of extracting the Flang-RT
"subproject" in #110217. This PR intends to only move pre-existing files
to the new folder structure, with no behavioral change. Common files
(headers, testing, cmake) shared by Flang-RT and Flang remain in
`flang/`.

Some cosmetic changes and files paths were necessary:
* Relative paths to the new path for the source files and
`add_subdirectory`.
 * Add the new location's include directory to `include_directories`
* The unittest/Evaluate directory has unitests for flang-rt and Flang. A
new `CMakeLists.txt` was introduced for the flang-rt tests.
 * Change the `#include` paths relative to the include directive
 * clang-format on the `#include` directives
* Since the paths are part if the copyright header and include guards, a
script was used to canonicalize those
* `test/Runtime` and runtime tests in `test/Driver` are moved, but the
lit.cfg.py mechanism to execute the will only be added in #110217.
2025-02-16 13:25:31 +01:00

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1.9 KiB
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//===-- examples/ExternalHelloWorld/external-hello.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 "flang/Runtime/io-api.h"
#include "flang/Runtime/main.h"
#include "flang/Runtime/stop.h"
#include <cstring>
#include <limits>
using namespace Fortran::runtime::io;
void output1() {
auto io{IONAME(BeginExternalListOutput)()};
const char str[]{"Hello, world!"};
IONAME(OutputAscii)(io, str, std::strlen(str));
IONAME(OutputInteger64)(io, 678);
IONAME(OutputReal64)(io, 0.0);
IONAME(OutputReal64)(io, 2.0 / 3.0);
IONAME(OutputReal64)(io, 1.0e99);
IONAME(OutputReal64)(io, std::numeric_limits<double>::infinity());
IONAME(OutputReal64)(io, -std::numeric_limits<double>::infinity());
IONAME(OutputReal64)(io, std::numeric_limits<double>::quiet_NaN());
IONAME(OutputComplex64)(io, 123.0, -234.0);
IONAME(OutputLogical)(io, false);
IONAME(OutputLogical)(io, true);
IONAME(EndIoStatement)(io);
}
void input1() {
auto io{IONAME(BeginExternalListOutput)()};
const char prompt[]{"Enter an integer value:"};
IONAME(OutputAscii)(io, prompt, std::strlen(prompt));
IONAME(EndIoStatement)(io);
io = IONAME(BeginExternalListInput)();
std::int64_t n{-666};
IONAME(InputInteger)(io, n);
IONAME(EndIoStatement)(io);
io = IONAME(BeginExternalListOutput)();
const char str[]{"Result:"};
IONAME(OutputAscii)(io, str, std::strlen(str));
IONAME(OutputInteger64)(io, n);
IONAME(EndIoStatement)(io);
}
int main(int argc, const char *argv[], const char *envp[]) {
RTNAME(ProgramStart)(argc, argv, envp, nullptr);
output1();
input1();
RTNAME(PauseStatement)();
RTNAME(ProgramEndStatement)();
return 0;
}