nss/nss_parse_line_result.c

   1 /* Implementation of __nss_parse_line_result.
   2    Copyright (C) 2020-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <nss_files.h>
  20
  21 #include <assert.h>
  22 #include <errno.h>
  23
  24 int
  25 __nss_parse_line_result (FILE *fp, off64_t offset, int parse_line_result)
  26 {
  27   assert (parse_line_result >= -1 && parse_line_result <= 1);
  28
  29   switch (__builtin_expect (parse_line_result, 1))
  30     {
  31     case 1:
  32       /* Sucess.  */
  33       return 0;
  34     case 0:
  35       /* Parse error.  */
  36       __set_errno (EINVAL);
  37       return EINVAL;
  38     case -1:
  39       /* Out of buffer space.  */
  40       return __nss_readline_seek (fp, offset);
  41
  42       default:
  43         __builtin_unreachable ();
  44     }
  45 }
  46 libc_hidden_def (__nss_parse_line_result)