stdio-common/scanf14.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <wchar.h>
   5 #include <libc-diag.h>
   6
   7 #define FAIL() \
   8   do {                                                  \
   9     result = 1;                                         \
  10     printf ("test at line %d failed\n", __LINE__);      \
  11   } while (0)
  12
  13 int
  14 main (void)
  15 {
  16   wchar_t *lsp;
  17   char *sp;
  18   float f;
  19   double d;
  20   char c[8];
  21   int result = 0;
  22
  23   if (sscanf (" 0.25s x", "%e%3c", &f, c) != 2)
  24     FAIL ();
  25   else if (f != 0.25 || memcmp (c, "s x", 3) != 0)
  26     FAIL ();
  27   /* GCC in C99 mode treats %a as the C99 format expecting float *,
  28      but glibc with _GNU_SOURCE treats %as as the GNU allocation
  29      extension, so resulting in "warning: format '%a' expects argument
  30      of type 'float *', but argument 3 has type 'char **'".  This
  31      applies to the other %as, %aS and %a[] formats below as well.  */
  32   DIAG_PUSH_NEEDS_COMMENT;
  33   DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat");
  34   if (sscanf (" 1.25s x", "%as%2c", &sp, c) != 2)
  35     FAIL ();
  36   else
  37     {
  38       if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
  39         FAIL ();
  40       memset (sp, 'x', sizeof "1.25s");
  41       free (sp);
  42     }
  43   DIAG_POP_NEEDS_COMMENT;
  44   if (sscanf (" 2.25s x", "%las%2c", &d, c) != 2)
  45     FAIL ();
  46   else if (d != 2.25 || memcmp (c, " x", 2) != 0)
  47     FAIL ();
  48   /* See explanation above.  */
  49   DIAG_PUSH_NEEDS_COMMENT;
  50   DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat");
  51   if (sscanf (" 3.25S x", "%4aS%3c", &lsp, c) != 2)
  52     FAIL ();
  53   else
  54     {
  55       if (wcscmp (lsp, L"3.25") != 0 || memcmp (c, "S x", 3) != 0)
  56         FAIL ();
  57       memset (lsp, 'x', sizeof L"3.25");
  58       free (lsp);
  59     }
  60   if (sscanf ("4.25[0-9.] x", "%a[0-9.]%8c", &sp, c) != 2)
  61     FAIL ();
  62   else
  63     {
  64       if (strcmp (sp, "4.25") != 0 || memcmp (c, "[0-9.] x", 8) != 0)
  65         FAIL ();
  66       memset (sp, 'x', sizeof "4.25");
  67       free (sp);
  68     }
  69   DIAG_POP_NEEDS_COMMENT;
  70   if (sscanf ("5.25[0-9.] x", "%la[0-9.]%2c", &d, c) != 2)
  71     FAIL ();
  72   else if (d != 5.25 || memcmp (c, " x", 2) != 0)
  73     FAIL ();
  74
  75   const char *tmpdir = getenv ("TMPDIR");
  76   if (tmpdir == NULL || tmpdir[0] == '\0')
  77     tmpdir = "/tmp";
  78
  79   char fname[strlen (tmpdir) + sizeof "/tst-scanf14.XXXXXX"];
  80   sprintf (fname, "%s/tst-scanf14.XXXXXX", tmpdir);
  81   if (fname == NULL)
  82     FAIL ();
  83
  84   /* Create a temporary file.   */
  85   int fd = mkstemp (fname);
  86   if (fd == -1)
  87     FAIL ();
  88
  89   FILE *fp = fdopen (fd, "w+");
  90   if (fp == NULL)
  91     FAIL ();
  92   else
  93     {
  94       if (fputs (" 1.25s x", fp) == EOF)
  95         FAIL ();
  96       if (fseek (fp, 0, SEEK_SET) != 0)
  97         FAIL ();
  98       /* See explanation above.  */
  99       DIAG_PUSH_NEEDS_COMMENT;
 100       DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat");
 101       if (fscanf (fp, "%as%2c", &sp, c) != 2)
 102         FAIL ();
 103       else
 104         {
 105           if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
 106             FAIL ();
 107           memset (sp, 'x', sizeof "1.25s");
 108           free (sp);
 109         }
 110       DIAG_POP_NEEDS_COMMENT;
 111
 112       if (freopen (fname, "r", stdin) == NULL)
 113         FAIL ();
 114       else
 115         {
 116           /* See explanation above.  */
 117           DIAG_PUSH_NEEDS_COMMENT;
 118           DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat");
 119           if (scanf ("%as%2c", &sp, c) != 2)
 120             FAIL ();
 121           else
 122             {
 123               if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
 124                 FAIL ();
 125               memset (sp, 'x', sizeof "1.25s");
 126               free (sp);
 127             }
 128           DIAG_POP_NEEDS_COMMENT;
 129         }
 130
 131       fclose (fp);
 132     }
 133
 134   remove (fname);
 135
 136   return result;
 137 }