stdio-common/scanf19.c

   1 /* Copyright (C) 2008-2024 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 <stdarg.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <wchar.h>
  28
  29 #if !__GLIBC_USE_DEPRECATED_SCANF
  30 # error "This file should be compiled with deprecated scanf"
  31 #endif
  32
  33 #define FAIL() \
  34   do {                                                  \
  35     result = 1;                                         \
  36     printf ("test at line %d failed\n", __LINE__);      \
  37   } while (0)
  38
  39 static int __attribute__ ((format (scanf, 2, 3)))
  40 xsscanf (const char *str, const char *fmt, ...)
  41 {
  42   va_list ap;
  43   va_start (ap, fmt);
  44   int ret = vsscanf (str, fmt, ap);
  45   va_end (ap);
  46   return ret;
  47 }
  48
  49 static int __attribute__ ((format (scanf, 1, 2)))
  50 xscanf (const char *fmt, ...)
  51 {
  52   va_list ap;
  53   va_start (ap, fmt);
  54   int ret = vscanf (fmt, ap);
  55   va_end (ap);
  56   return ret;
  57 }
  58
  59 static int __attribute__ ((format (scanf, 2, 3)))
  60 xfscanf (FILE *f, const char *fmt, ...)
  61 {
  62   va_list ap;
  63   va_start (ap, fmt);
  64   int ret = vfscanf (f, fmt, ap);
  65   va_end (ap);
  66   return ret;
  67 }
  68
  69 int
  70 main (void)
  71 {
  72   wchar_t *lsp;
  73   char *sp;
  74   float f;
  75   double d;
  76   char c[8];
  77   int result = 0;
  78
  79   if (xsscanf (" 0.25s x", "%e%3c", &f, c) != 2)
  80     FAIL ();
  81   else if (f != 0.25 || memcmp (c, "s x", 3) != 0)
  82     FAIL ();
  83   if (xsscanf (" 1.25s x", "%as%2c", &sp, c) != 2)
  84     FAIL ();
  85   else
  86     {
  87       if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
  88         FAIL ();
  89       memset (sp, 'x', sizeof "1.25s");
  90       free (sp);
  91     }
  92   if (xsscanf (" 2.25s x", "%las%2c", &d, c) != 2)
  93     FAIL ();
  94   else if (d != 2.25 || memcmp (c, " x", 2) != 0)
  95     FAIL ();
  96   if (xsscanf (" 3.25S x", "%4aS%3c", &lsp, c) != 2)
  97     FAIL ();
  98   else
  99     {
 100       if (wcscmp (lsp, L"3.25") != 0 || memcmp (c, "S x", 3) != 0)
 101         FAIL ();
 102       memset (lsp, 'x', sizeof L"3.25");
 103       free (lsp);
 104     }
 105   if (xsscanf ("4.25[0-9.] x", "%a[0-9.]%8c", &sp, c) != 2)
 106     FAIL ();
 107   else
 108     {
 109       if (strcmp (sp, "4.25") != 0 || memcmp (c, "[0-9.] x", 8) != 0)
 110         FAIL ();
 111       memset (sp, 'x', sizeof "4.25");
 112       free (sp);
 113     }
 114   if (xsscanf ("5.25[0-9.] x", "%la[0-9.]%2c", &d, c) != 2)
 115     FAIL ();
 116   else if (d != 5.25 || memcmp (c, " x", 2) != 0)
 117     FAIL ();
 118
 119   const char *tmpdir = getenv ("TMPDIR");
 120   if (tmpdir == NULL || tmpdir[0] == '\0')
 121     tmpdir = "/tmp";
 122
 123   char fname[strlen (tmpdir) + sizeof "/tst-scanf16.XXXXXX"];
 124   sprintf (fname, "%s/tst-scanf16.XXXXXX", tmpdir);
 125
 126   /* Create a temporary file.   */
 127   int fd = mkstemp (fname);
 128   if (fd == -1)
 129     FAIL ();
 130
 131   FILE *fp = fdopen (fd, "w+");
 132   if (fp == NULL)
 133     FAIL ();
 134   else
 135     {
 136       if (fputs (" 1.25s x", fp) == EOF)
 137         FAIL ();
 138       if (fseek (fp, 0, SEEK_SET) != 0)
 139         FAIL ();
 140       if (xfscanf (fp, "%as%2c", &sp, c) != 2)
 141         FAIL ();
 142       else
 143         {
 144           if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
 145             FAIL ();
 146           memset (sp, 'x', sizeof "1.25s");
 147           free (sp);
 148         }
 149
 150       if (freopen (fname, "r", stdin) == NULL)
 151         FAIL ();
 152       else
 153         {
 154           if (xscanf ("%as%2c", &sp, c) != 2)
 155             FAIL ();
 156           else
 157             {
 158               if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
 159                 FAIL ();
 160               memset (sp, 'x', sizeof "1.25s");
 161               free (sp);
 162             }
 163         }
 164
 165       fclose (fp);
 166     }
 167
 168   remove (fname);
 169
 170   return result;
 171 }