libc/src/stdio/puts.cpp

   1 //===-- Implementation of puts --------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/stdio/puts.h"
  10 #include "src/__support/CPP/string_view.h"
  11 #include "src/__support/File/file.h"
  12
  13 #include <errno.h>
  14 #include <stdio.h>
  15
  16 namespace __llvm_libc {
  17
  18 LLVM_LIBC_FUNCTION(int, puts, (const char *__restrict str)) {
  19   cpp::string_view str_view(str);
  20   auto result = __llvm_libc::stdout->write(str, str_view.size());
  21   if (result.has_error())
  22     errno = result.error;
  23   size_t written = result.value;
  24   if (str_view.size() != written) {
  25     // The stream should be in an error state in this case.
  26     return EOF;
  27   }
  28   result = __llvm_libc::stdout->write("\n", 1);
  29   if (result.has_error())
  30     errno = result.error;
  31   written = result.value;
  32   if (1 != written) {
  33     // The stream should be in an error state in this case.
  34     return EOF;
  35   }
  36   return 0;
  37 }
  38
  39 } // namespace __llvm_libc