misc/tst-ldbl-warn.c

   1 /* Test for the long double conversions in *warn* functions.
   2    Copyright (C) 2018 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <err.h>
  20 #include <errno.h>
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include <support/check.h>
  27 #include <support/xmemstream.h>
  28
  29 enum {WARN, WARNX, VWARN, VWARNX};
  30
  31 static void
  32 do_one_test (int select, const char *format, va_list args,
  33              long double arg1, double arg2, long double arg3,
  34              double arg4, const char *expected)
  35 {
  36   /* Prepare in-memory buffer to hold the output.  */
  37   struct xmemstream stream;
  38   xopen_memstream (&stream);
  39   FILE *old_stderr = stderr;
  40   stderr = stream.out;
  41
  42   /* Write to the buffer using one of the *warn* functions.  */
  43   errno = 0;
  44   switch (select)
  45     {
  46       case WARN:
  47         warn (format, arg1, arg2, arg3, arg4);
  48         break;
  49       case WARNX:
  50         warnx (format, arg1, arg2, arg3, arg4);
  51         break;
  52       case VWARN:
  53         vwarn (format, args);
  54         break;
  55       case VWARNX:
  56         vwarnx (format, args);
  57         break;
  58     }
  59
  60   stderr = old_stderr;
  61
  62   /* Close the in-memory stream and check the output buffer.  */
  63   xfclose_memstream (&stream);
  64   TEST_COMPARE_STRING (stream.buffer, expected);
  65
  66   if (stream.buffer != NULL)
  67     free (stream.buffer);
  68 }
  69
  70 static void
  71 do_test_call_varg (const char *format, ...)
  72 {
  73   va_list args;
  74
  75   va_start (args, format);
  76   do_one_test (VWARN, format, args, 0, 0, 0, 0,
  77                "tst-ldbl-warn: "
  78                "-1.000000 - -2.000000 - -3.000000 - -4.000000: Success\n");
  79   va_end (args);
  80
  81   va_start (args, format);
  82   do_one_test (VWARNX, format, args, 0, 0, 0, 0,
  83                "tst-ldbl-warn: "
  84                "-1.000000 - -2.000000 - -3.000000 - -4.000000\n");
  85   va_end (args);
  86 }
  87
  88 static void
  89 do_test_call_rarg (const char *format, long double arg1, double arg2,
  90                    long double arg3, double arg4)
  91 {
  92   va_list args;
  93   memset (&args, 0, sizeof (args));
  94   do_one_test (WARN, format, args, arg1, arg2, arg3, arg4,
  95                "tst-ldbl-warn: "
  96                "-1.000000 - -2.000000 - -3.000000 - -4.000000: Success\n");
  97   do_one_test (WARNX, format, args, arg1, arg2, arg3, arg4,
  98                "tst-ldbl-warn: "
  99                "-1.000000 - -2.000000 - -3.000000 - -4.000000\n");
 100 }
 101
 102 static int
 103 do_test (void)
 104 {
 105   long double arg1 = -1;
 106   long double arg3 = -3;
 107   double arg2 = -2;
 108   double arg4 = -4;
 109
 110   do_test_call_rarg ("%Lf - %f - %Lf - %f", arg1, arg2, arg3, arg4);
 111   do_test_call_varg ("%Lf - %f - %Lf - %f", arg1, arg2, arg3, arg4);
 112
 113   return 0;
 114 }
 115
 116 #include <support/test-driver.c>