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annotate tests/test-freadahead.c @ 12496:a48d3d749ca5

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Refactor common macros used in tests.
author Bruno Haible <bruno@clisp.org>
date Thu, 24 Dec 2009 21:01:42 +0100
parents e8d2c6fc33ad
children c2cbabec01dd
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1 /* Test of freadahead() function.
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2 Copyright (C) 2007-2009 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 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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18
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19 #include <config.h>
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20
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21 #include "freadahead.h"
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22
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23 #include <stdlib.h>
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24 #include <unistd.h>
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25
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26 #include "macros.h"
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27
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28 int
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29 main (int argc, char **argv)
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30 {
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31 int nbytes = atoi (argv[1]);
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32 if (nbytes > 0)
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33 {
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34 void *buf = malloc (nbytes);
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35 ASSERT (fread (buf, 1, nbytes, stdin) == nbytes);
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36 }
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37
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38 if (nbytes == 0)
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39 ASSERT (freadahead (stdin) == 0);
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40 else
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41 {
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42 if (lseek (0, 0, SEEK_CUR) == nbytes)
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43 /* An unbuffered stdio, such as BeOS or on uClibc compiled without
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44 __STDIO_BUFFERS. */
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45 ASSERT (freadahead (stdin) == 0);
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46 else
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47 {
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48 /* Normal buffered stdio. */
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49 size_t buffered;
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50 int c, c2;
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51
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52 ASSERT (freadahead (stdin) != 0);
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53 buffered = freadahead (stdin);
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54
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55 c = fgetc (stdin);
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56 ASSERT (freadahead (stdin) == buffered - 1);
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57 ungetc (c, stdin);
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58 ASSERT (freadahead (stdin) == buffered);
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59 c2 = fgetc (stdin);
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60 ASSERT (c2 == c);
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61 ASSERT (freadahead (stdin) == buffered - 1);
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62
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63 c = '@';
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64 ungetc (c, stdin);
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65 ASSERT (freadahead (stdin) == buffered);
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66 c2 = fgetc (stdin);
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67 ASSERT (c2 == c);
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68 ASSERT (freadahead (stdin) == buffered - 1);
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69 }
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70 }
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71
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72 return 0;
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73 }