misc/tst-ldbl-warn.c

   1 /* Test for the long double conversions in *warn* functions.
   2    Copyright (C) 2018-2020 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 <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.  */
  63   xfclose_memstream (&stream);
  64
  65   /* Filter out the name of the program (which should always end with
  66      warn), so that the test case can be reused by ldbl-opt and
  67      ldbl-128ibm-compat.  */
  68   const char *needle = "warn: ";
  69   char *message;
  70   message = strstr (stream.buffer, needle);
  71   if (message == NULL)
  72     FAIL_EXIT1 ("test case error");
  73   message += strlen (needle);
  74
  75   /* Check that the rest of the output is as expected.  */
  76   TEST_COMPARE_STRING (message, expected);
  77
  78   if (stream.buffer != NULL)
  79     free (stream.buffer);
  80 }
  81
  82 static void
  83 do_test_call_varg (const char *format, ...)
  84 {
  85   va_list args;
  86
  87   va_start (args, format);
  88   do_one_test (VWARN, format, args, 0, 0, 0, 0,
  89                "-1.000000 - -2.000000 - -3.000000 - -4.000000: Success\n");
  90   va_end (args);
  91
  92   va_start (args, format);
  93   do_one_test (VWARNX, format, args, 0, 0, 0, 0,
  94                "-1.000000 - -2.000000 - -3.000000 - -4.000000\n");
  95   va_end (args);
  96 }
  97
  98 static void
  99 do_test_call_rarg (const char *format, long double arg1, double arg2,
 100                    long double arg3, double arg4)
 101 {
 102   va_list args;
 103   memset (&args, 0, sizeof (args));
 104   do_one_test (WARN, format, args, arg1, arg2, arg3, arg4,
 105                "-1.000000 - -2.000000 - -3.000000 - -4.000000: Success\n");
 106   do_one_test (WARNX, format, args, arg1, arg2, arg3, arg4,
 107                "-1.000000 - -2.000000 - -3.000000 - -4.000000\n");
 108 }
 109
 110 static int
 111 do_test (void)
 112 {
 113   long double arg1 = -1;
 114   long double arg3 = -3;
 115   double arg2 = -2;
 116   double arg4 = -4;
 117
 118   do_test_call_rarg ("%Lf - %f - %Lf - %f", arg1, arg2, arg3, arg4);
 119   do_test_call_varg ("%Lf - %f - %Lf - %f", arg1, arg2, arg3, arg4);
 120
 121   return 0;
 122 }
 123
 124 #include <support/test-driver.c>