stdio-common/scanf16.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 #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 __attribute__ ((format (scanf, 2, 3)))
  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 __attribute__ ((format (scanf, 1, 2)))
  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 __attribute__ ((format (scanf, 2, 3)))
  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   wchar_t *lsp;
  68   char *sp;
  69   float f;
  70   double d;
  71   char c[8];
  72   int result = 0;
  73
  74   if (xsscanf (" 0.25s x", "%e%3c", &f, c) != 2)
  75     FAIL ();
  76   else if (f != 0.25 || memcmp (c, "s x", 3) != 0)
  77     FAIL ();
  78   if (xsscanf (" 1.25s x", "%ms%2c", &sp, c) != 2)
  79     FAIL ();
  80   else
  81     {
  82       if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
  83         FAIL ();
  84       memset (sp, 'x', sizeof "1.25s");
  85       free (sp);
  86     }
  87   if (xsscanf (" 2.25s x", "%las%2c", &d, c) != 2)
  88     FAIL ();
  89   else if (d != 2.25 || memcmp (c, " x", 2) != 0)
  90     FAIL ();
  91   if (xsscanf (" 3.25S x", "%4mS%3c", &lsp, c) != 2)
  92     FAIL ();
  93   else
  94     {
  95       if (wcscmp (lsp, L"3.25") != 0 || memcmp (c, "S x", 3) != 0)
  96         FAIL ();
  97       memset (lsp, 'x', sizeof L"3.25");
  98       free (lsp);
  99     }
 100   if (xsscanf ("4.25[0-9.] x", "%m[0-9.]%8c", &sp, c) != 2)
 101     FAIL ();
 102   else
 103     {
 104       if (strcmp (sp, "4.25") != 0 || memcmp (c, "[0-9.] x", 8) != 0)
 105         FAIL ();
 106       memset (sp, 'x', sizeof "4.25");
 107       free (sp);
 108     }
 109   if (xsscanf ("5.25[0-9.] x", "%la[0-9.]%2c", &d, c) != 2)
 110     FAIL ();
 111   else if (d != 5.25 || memcmp (c, " x", 2) != 0)
 112     FAIL ();
 113
 114   const char *tmpdir = getenv ("TMPDIR");
 115   if (tmpdir == NULL || tmpdir[0] == '\0')
 116     tmpdir = "/tmp";
 117
 118   char fname[strlen (tmpdir) + sizeof "/tst-scanf16.XXXXXX"];
 119   sprintf (fname, "%s/tst-scanf16.XXXXXX", tmpdir);
 120
 121   /* Create a temporary file.   */
 122   int fd = mkstemp (fname);
 123   if (fd == -1)
 124     FAIL ();
 125
 126   FILE *fp = fdopen (fd, "w+");
 127   if (fp == NULL)
 128     FAIL ();
 129   else
 130     {
 131       if (fputs (" 1.25s x", fp) == EOF)
 132         FAIL ();
 133       if (fseek (fp, 0, SEEK_SET) != 0)
 134         FAIL ();
 135       if (xfscanf (fp, "%ms%2c", &sp, c) != 2)
 136         FAIL ();
 137       else
 138         {
 139           if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
 140             FAIL ();
 141           memset (sp, 'x', sizeof "1.25s");
 142           free (sp);
 143         }
 144
 145       if (freopen (fname, "r", stdin) == NULL)
 146         FAIL ();
 147       else
 148         {
 149           if (xscanf ("%ms%2c", &sp, c) != 2)
 150             FAIL ();
 151           else
 152             {
 153               if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)
 154                 FAIL ();
 155               memset (sp, 'x', sizeof "1.25s");
 156               free (sp);
 157             }
 158         }
 159
 160       fclose (fp);
 161     }
 162
 163   remove (fname);
 164
 165   return result;
 166 }