libc/src/__support/OSUtil/baremetal/io.cpp

//===---------- Baremetal implementation of IO utils ------------*- 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 "io.h"

#include "hdr/types/FILE.h"
#include "src/__support/CPP/string_view.h"
#include "src/__support/macros/config.h"

namespace LIBC_NAMESPACE_DECL {

extern "C" FILE *stdin = reinterpret_cast<FILE *>(&__llvm_libc_stdin_cookie);
extern "C" FILE *stdout = reinterpret_cast<FILE *>(&__llvm_libc_stdout_cookie);
extern "C" FILE *stderr = reinterpret_cast<FILE *>(&__llvm_libc_stderr_cookie);

ssize_t read_from_stdin(char *buf, size_t size) {
  return __llvm_libc_stdio_read(static_cast<void *>(&__llvm_libc_stdin_cookie),
                                buf, size);
}

void write_to_stdout(cpp::string_view msg) {
  __llvm_libc_stdio_write(static_cast<void *>(&__llvm_libc_stdout_cookie),
                          msg.data(), msg.size());
}

void write_to_stderr(cpp::string_view msg) {
  __llvm_libc_stdio_write(static_cast<void *>(&__llvm_libc_stderr_cookie),
                          msg.data(), msg.size());
}

} // namespace LIBC_NAMESPACE_DECL