libio/tst_putwc.c

   1 /* Simple test of putwc in the C locale.
   2    Copyright (C) 2000 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #include <error.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <wchar.h>
  26
  27 static const char outname[] = OBJPFX "tst_putwc.temp";
  28
  29 /* Prototype for our test function.  */
  30 int do_test (void);
  31 #define TEST_FUNCTION do_test ()
  32
  33 /* This defines the `main' function and some more.  */
  34 #include <test-skeleton.c>
  35
  36 int
  37 do_test (void)
  38 {
  39   const wchar_t str[] = L"This is a test of putwc\n";
  40   wchar_t buf[100];
  41   size_t n = 0;
  42   FILE *fp;
  43   int res = 0;
  44
  45   add_temp_file (outname);
  46
  47   fp = fopen (outname, "w+");
  48   if (fp == NULL)
  49     error (EXIT_FAILURE, errno, "cannot open temporary file");
  50
  51   for (n = 0; str[n] != L'\0'; ++n)
  52     putwc (str[n], fp);
  53
  54   /* First try reading after rewinding.  */
  55   rewind (fp);
  56
  57   wmemset (buf, L'\0', sizeof (buf) / sizeof (buf[0]));
  58   n = 0;
  59   while (! feof (fp) && n < sizeof (buf) - 1)
  60     {
  61       buf[n] = getwc (fp);
  62       if (buf[n] == WEOF)
  63         break;
  64       ++n;
  65     }
  66   buf[n] = L'\0';
  67
  68   if (wcscmp (buf, L"This is a test of putwc\n") != 0)
  69     {
  70       puts ("first comparison failed");
  71       res = 1;
  72     }
  73
  74   /* Now close the file, open it again, and read again.  */
  75   if (fclose (fp) != 0)
  76     {
  77       printf ("failure during fclose(): %m");
  78       res = 1;
  79     }
  80
  81   fp = fopen (outname, "r");
  82   if (fp == NULL)
  83     error (EXIT_FAILURE, errno, "cannot reopen file");
  84
  85   /* We can remove the file now.  */
  86   remove (outname);
  87
  88   wmemset (buf, L'\0', sizeof (buf) / sizeof (buf[0]));
  89   n = 0;
  90   while (! feof (fp) && n < sizeof (buf) - 1)
  91     {
  92       buf[n] = getwc (fp);
  93       if (buf[n] == WEOF)
  94         break;
  95       ++n;
  96     }
  97   buf[n] = L'\0';
  98
  99   if (wcscmp (buf, L"This is a test of putwc\n") != 0)
 100     {
 101       puts ("second comparison failed");
 102       res = 1;
 103     }
 104
 105   if (fclose (fp) != 0)
 106     {
 107       puts ("failure during fclose()");
 108       res = 1;
 109     }
 110
 111   /* Next test: write a bit more than a few bytes.  */
 112   fp = fopen (outname, "w");
 113   if (fp == NULL)
 114     error (EXIT_FAILURE, errno, "cannot open temporary file");
 115
 116   for (n = 0; n < 4098; ++n)
 117     putwc (n & 255, fp);
 118
 119   fclose (fp);
 120
 121   return res;
 122 }