1/* mpfr_set_str_binary -- set a floating-point number from a binary string 2 3Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. 4Contributed by the AriC and Caramel projects, INRIA. 5 6This file is part of the GNU MPFR Library. 7 8The GNU MPFR Library is free software; you can redistribute it and/or modify 9it under the terms of the GNU Lesser General Public License as published by 10the Free Software Foundation; either version 3 of the License, or (at your 11option) any later version. 12 13The GNU MPFR Library is distributed in the hope that it will be useful, but 14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16License for more details. 17 18You should have received a copy of the GNU Lesser General Public License 19along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23#include "mpfr-impl.h" 24 25/* Currently the number should be of the form +/- xxxx.xxxxxxEyy, with 26 decimal exponent. The mantissa of x is supposed to be large enough 27 to hold all the bits of str. */ 28 29void 30mpfr_set_str_binary (mpfr_ptr x, const char *str) 31{ 32 int has_sign; 33 int res; 34 35 if (*str == 'N') 36 { 37 MPFR_SET_NAN(x); 38 __gmpfr_flags |= MPFR_FLAGS_NAN; 39 return; 40 } 41 42 has_sign = *str == '-' || *str == '+'; 43 if (str[has_sign] == 'I') 44 { 45 MPFR_SET_INF(x); 46 if (*str == '-') 47 MPFR_SET_NEG(x); 48 else 49 MPFR_SET_POS(x); 50 return; 51 } 52 53 res = mpfr_strtofr (x, str, 0, 2, MPFR_RNDZ); 54 MPFR_ASSERTN (res == 0); 55} 56