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annotate tests/test-fflush2.c @ 10944:f08a483da33c

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Tests for module 'wcsnrtombs'.
author Bruno Haible <bruno@clisp.org>
date Mon, 22 Dec 2008 00:43:50 +0100
parents 0be6f1ab456d
children 1b3e52ed017e
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1 /* Test of POSIX compatible fflush() function.
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2 Copyright (C) 2008 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16
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17 #include <config.h>
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18
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19 #include <stdio.h>
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20
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21 #include <stdlib.h>
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22
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23 /* This test can only be made to work on specific platforms. */
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24 #if defined _IO_ferror_unlocked || defined __sferror /* GNU libc, BeOS; FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
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25 # define ASSERT(expr) \
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26 do \
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27 { \
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28 if (!(expr)) \
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29 { \
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30 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
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31 fflush (stderr); \
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32 abort (); \
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33 } \
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34 } \
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35 while (0)
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36 #else
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37 # define ASSERT(expr) \
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38 do \
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39 { \
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40 if (!(expr)) \
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41 { \
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42 printf ("Skipping test: expected failure on this platform\n"); \
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43 exit (77); \
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44 } \
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45 } \
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46 while (0)
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47 #endif
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48
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49 int
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50 main (int argc, char **argv)
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51 {
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52 #if 0
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53 /* Check fflush after a backup ungetc() call. This is case 1 in terms of
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54 <http://lists.gnu.org/archive/html/bug-gnulib/2008-03/msg00131.html>.
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55 The Austin Group has not yet decided how this should behave. */
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56 #endif
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57 #if 0
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58 /* Check fflush after a non-backup ungetc() call. This is case 2 in terms of
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59 <http://lists.gnu.org/archive/html/bug-gnulib/2008-03/msg00131.html>.
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60 The Austin Group has not yet decided how this should behave. */
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61 /* Check that fflush after a non-backup ungetc() call discards the ungetc
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62 buffer. This is mandated by POSIX
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63 <http://www.opengroup.org/susv3/functions/ungetc.html>:
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64 "The value of the file-position indicator for the stream after
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65 reading or discarding all pushed-back bytes shall be the same
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66 as it was before the bytes were pushed back." */
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67 int c;
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68
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69 c = fgetc (stdin);
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70 ASSERT (c == '#');
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71
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72 c = fgetc (stdin);
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73 ASSERT (c == '!');
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74
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75 /* Here the file-position indicator must be 2. */
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76
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77 c = ungetc ('@', stdin);
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78 ASSERT (c == '@');
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79
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80 fflush (stdin);
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81
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82 /* Here the file-position indicator must be 2 again. */
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83
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84 c = fgetc (stdin);
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85 ASSERT (c == '/');
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86 #endif
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87
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88 return 0;
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89 }