stdio-common/scanf18.c

   1 /* Copyright (C) 2007-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 /* This test exercises the deprecated GNU %as, %aS, and %a[...] scanf
  19    modifiers, which are not available to programs compiled as C99
  20    anymore; therefore, this file is compiled with -std=gnu89 and C99
  21    syntax must not be used.  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <wchar.h>
  27
  28 #if !__GLIBC_USE_DEPRECATED_SCANF
  29 # error "This file should be compiled with deprecated scanf"
  30 #endif
  31
  32
  33 #define FAIL() \
  34   do {                                                  \
  35     result = 1;                                         \
  36     printf ("test at line %d failed\n", __LINE__);      \
  37   } while (0)
  38
  39 int
  40 main (void)
  41 {
  42   wchar_t *lsp;
  43   char *sp;
  44   float f;
  45   double d;
  46   char c[8];
  47   int result = 0;
  48
  49   if (sscanf (" 0.25s x", "%e%3c", &f, c) != 2)
  50     FAIL ();
  51   else if (f != 0.25 || memcmp (c, "s x", 3) != 0)
  52     FAIL ();
  53   if (sscanf (" 1.25s x", "%as%2c", &sp, c) != 2)
  54     FAIL ();
  55   else
  56     {
  57       if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
  58         FAIL ();
  59       memset (sp, 'x', sizeof "1.25s");
  60       free (sp);
  61     }
  62   if (sscanf (" 2.25s x", "%las%2c", &d, c) != 2)
  63     FAIL ();
  64   else if (d != 2.25 || memcmp (c, " x", 2) != 0)
  65     FAIL ();
  66   if (sscanf (" 3.25S x", "%4aS%3c", &lsp, c) != 2)
  67     FAIL ();
  68   else
  69     {
  70       if (wcscmp (lsp, L"3.25") != 0 || memcmp (c, "S x", 3) != 0)
  71         FAIL ();
  72       memset (lsp, 'x', sizeof L"3.25");
  73       free (lsp);
  74     }
  75   if (sscanf ("4.25[0-9.] x", "%a[0-9.]%8c", &sp, c) != 2)
  76     FAIL ();
  77   else
  78     {
  79       if (strcmp (sp, "4.25") != 0 || memcmp (c, "[0-9.] x", 8) != 0)
  80         FAIL ();
  81       memset (sp, 'x', sizeof "4.25");
  82       free (sp);
  83     }
  84   if (sscanf ("5.25[0-9.] x", "%la[0-9.]%2c", &d, c) != 2)
  85     FAIL ();
  86   else if (d != 5.25 || memcmp (c, " x", 2) != 0)
  87     FAIL ();
  88
  89   const char *tmpdir = getenv ("TMPDIR");
  90   if (tmpdir == NULL || tmpdir[0] == '\0')
  91     tmpdir = "/tmp";
  92
  93   char fname[strlen (tmpdir) + sizeof "/tst-scanf14.XXXXXX"];
  94   sprintf (fname, "%s/tst-scanf14.XXXXXX", tmpdir);
  95
  96   /* Create a temporary file.   */
  97   int fd = mkstemp (fname);
  98   if (fd == -1)
  99     FAIL ();
 100
 101   FILE *fp = fdopen (fd, "w+");
 102   if (fp == NULL)
 103     FAIL ();
 104   else
 105     {
 106       if (fputs (" 1.25s x", fp) == EOF)
 107         FAIL ();
 108       if (fseek (fp, 0, SEEK_SET) != 0)
 109         FAIL ();
 110       if (fscanf (fp, "%as%2c", &sp, c) != 2)
 111         FAIL ();
 112       else
 113         {
 114           if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
 115             FAIL ();
 116           memset (sp, 'x', sizeof "1.25s");
 117           free (sp);
 118         }
 119
 120       if (freopen (fname, "r", stdin) == NULL)
 121         FAIL ();
 122       else
 123         {
 124           if (scanf ("%as%2c", &sp, c) != 2)
 125             FAIL ();
 126           else
 127             {
 128               if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
 129                 FAIL ();
 130               memset (sp, 'x', sizeof "1.25s");
 131               free (sp);
 132             }
 133         }
 134
 135       fclose (fp);
 136     }
 137
 138   remove (fname);
 139
 140   return result;
 141 }