stdio-common/sscanf.c

   1 /* Copyright (C) 1991-2024 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 file defines one of the deprecated scanf variants.  */
  19 #include <features.h>
  20 #undef __GLIBC_USE_DEPRECATED_SCANF
  21 #define __GLIBC_USE_DEPRECATED_SCANF 1
  22
  23 #include <stdarg.h>
  24 #include <libio/strfile.h>
  25
  26 /* Read formatted input from S, according to the format string FORMAT.  */
  27
  28 int
  29 __sscanf (const char *s, const char *format, ...)
  30 {
  31   va_list arg;
  32   int done;
  33   _IO_strfile sf;
  34   FILE *f = _IO_strfile_read (&sf, s);
  35
  36   va_start (arg, format);
  37   done = __vfscanf_internal (f, format, arg, 0);
  38   va_end (arg);
  39
  40   return done;
  41 }
  42 ldbl_strong_alias (__sscanf, sscanf)
  43 ldbl_strong_alias (__sscanf, _IO_sscanf)