stdio-common/scanf17.c

   1 /* Copyright (C) 2008-2023 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 #include <stdarg.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <wchar.h>
  23
  24 #if __GLIBC_USE_DEPRECATED_SCANF
  25 # error "This file should not be compiled with deprecated scanf"
  26 #endif
  27
  28 #define FAIL() \
  29   do {                                                  \
  30     result = 1;                                         \
  31     printf ("test at line %d failed\n", __LINE__);      \
  32   } while (0)
  33
  34 static int
  35 xsscanf (const char *str, const char *fmt, ...)
  36 {
  37   va_list ap;
  38   va_start (ap, fmt);
  39   int ret = vsscanf (str, fmt, ap);
  40   va_end (ap);
  41   return ret;
  42 }
  43
  44 static int
  45 xscanf (const char *fmt, ...)
  46 {
  47   va_list ap;
  48   va_start (ap, fmt);
  49   int ret = vscanf (fmt, ap);
  50   va_end (ap);
  51   return ret;
  52 }
  53
  54 static int
  55 xfscanf (FILE *f, const char *fmt, ...)
  56 {
  57   va_list ap;
  58   va_start (ap, fmt);
  59   int ret = vfscanf (f, fmt, ap);
  60   va_end (ap);
  61   return ret;
  62 }
  63
  64 int
  65 main (void)
  66 {
  67   float f;
  68   double d;
  69   char c[8];
  70   int result = 0;
  71
  72   if (xsscanf (" 0.25s x", "%e%3c", &f, c) != 2)
  73     FAIL ();
  74   else if (f != 0.25 || memcmp (c, "s x", 3) != 0)
  75     FAIL ();
  76   if (xsscanf (" 1.25s x", "%as%2c", &f, c) != 2)
  77     FAIL ();
  78   else if (f != 1.25 || memcmp (c, " x", 2) != 0)
  79     FAIL ();
  80   if (xsscanf (" 2.25s x", "%las%2c", &d, c) != 2)
  81     FAIL ();
  82   else if (d != 2.25 || memcmp (c, " x", 2) != 0)
  83     FAIL ();
  84   if (xsscanf (" 3.25S x", "%4aS%2c", &f, c) != 2)
  85     FAIL ();
  86   else if (f != 3.25 || memcmp (c, " x", 2) != 0)
  87     FAIL ();
  88   if (xsscanf (" 4.25[0-9.] x", "%a[0-9.]%2c", &f, c) != 2)
  89     FAIL ();
  90   else if (f != 4.25 || memcmp (c, " x", 2) != 0)
  91     FAIL ();
  92   if (xsscanf (" 5.25[0-9.] x", "%la[0-9.]%2c", &d, c) != 2)
  93     FAIL ();
  94   else if (d != 5.25 || memcmp (c, " x", 2) != 0)
  95     FAIL ();
  96
  97   const char *tmpdir = getenv ("TMPDIR");
  98   if (tmpdir == NULL || tmpdir[0] == '\0')
  99     tmpdir = "/tmp";
 100
 101   char fname[strlen (tmpdir) + sizeof "/tst-scanf17.XXXXXX"];
 102   sprintf (fname, "%s/tst-scanf17.XXXXXX", tmpdir);
 103
 104   /* Create a temporary file.   */
 105   int fd = mkstemp (fname);
 106   if (fd == -1)
 107     FAIL ();
 108
 109   FILE *fp = fdopen (fd, "w+");
 110   if (fp == NULL)
 111     FAIL ();
 112   else
 113     {
 114       if (fputs (" 1.25s x", fp) == EOF)
 115         FAIL ();
 116       if (fseek (fp, 0, SEEK_SET) != 0)
 117         FAIL ();
 118       if (xfscanf (fp, "%as%2c", &f, c) != 2)
 119         FAIL ();
 120       else if (f != 1.25 || memcmp (c, " x", 2) != 0)
 121         FAIL ();
 122
 123       if (freopen (fname, "r", stdin) == NULL)
 124         FAIL ();
 125       else
 126         {
 127           if (xscanf ("%as%2c", &f, c) != 2)
 128             FAIL ();
 129           else if (f != 1.25 || memcmp (c, " x", 2) != 0)
 130             FAIL ();
 131         }
 132
 133       fclose (fp);
 134     }
 135
 136   remove (fname);
 137
 138   return result;
 139 }