iset_ui.c revision 1.1.1.1
1/* mpf_init_set_ui() -- Initialize a float and assign it from an unsigned int. 2 3Copyright 1993, 1994, 1995, 2000, 2001, 2003, 2004 Free Software Foundation, 4Inc. 5 6This file is part of the GNU MP Library. 7 8The GNU MP 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 MP 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 MP Library. If not, see http://www.gnu.org/licenses/. */ 20 21#include "gmp.h" 22#include "gmp-impl.h" 23 24void 25mpf_init_set_ui (mpf_ptr r, unsigned long int val) 26{ 27 mp_size_t prec = __gmp_default_fp_limb_precision; 28 mp_size_t size; 29 30 r->_mp_prec = prec; 31 r->_mp_d = (mp_ptr) (*__gmp_allocate_func) ((prec + 1) * BYTES_PER_MP_LIMB); 32 r->_mp_d[0] = val & GMP_NUMB_MASK; 33 size = (val != 0); 34 35#if BITS_PER_ULONG > GMP_NUMB_BITS 36 val >>= GMP_NUMB_BITS; 37 r->_mp_d[1] = val; 38 size += (val != 0); 39#endif 40 41 r->_mp_size = size; 42 r->_mp_exp = size; 43} 44