| Austin Schuh | bb1338c | 2024-06-15 19:31:16 -0700 | [diff] [blame] | 1 | /* mpf_set -- Assign a float from another float. |
| 2 | |
| 3 | Copyright 1993-1995, 2001, 2004 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of the GNU MP Library. |
| 6 | |
| 7 | The GNU MP Library is free software; you can redistribute it and/or modify |
| 8 | it under the terms of either: |
| 9 | |
| 10 | * the GNU Lesser General Public License as published by the Free |
| 11 | Software Foundation; either version 3 of the License, or (at your |
| 12 | option) any later version. |
| 13 | |
| 14 | or |
| 15 | |
| 16 | * the GNU General Public License as published by the Free Software |
| 17 | Foundation; either version 2 of the License, or (at your option) any |
| 18 | later version. |
| 19 | |
| 20 | or both in parallel, as here. |
| 21 | |
| 22 | The GNU MP Library is distributed in the hope that it will be useful, but |
| 23 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 24 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 25 | for more details. |
| 26 | |
| 27 | You should have received copies of the GNU General Public License and the |
| 28 | GNU Lesser General Public License along with the GNU MP Library. If not, |
| 29 | see https://www.gnu.org/licenses/. */ |
| 30 | |
| 31 | #include "gmp-impl.h" |
| 32 | |
| 33 | void |
| 34 | mpf_set (mpf_ptr r, mpf_srcptr u) |
| 35 | { |
| 36 | mp_ptr rp, up; |
| 37 | mp_size_t size, asize; |
| 38 | mp_size_t prec; |
| 39 | |
| 40 | prec = r->_mp_prec + 1; /* lie not to lose precision in assignment */ |
| 41 | size = u->_mp_size; |
| 42 | asize = ABS (size); |
| 43 | rp = r->_mp_d; |
| 44 | up = u->_mp_d; |
| 45 | |
| 46 | if (asize > prec) |
| 47 | { |
| 48 | up += asize - prec; |
| 49 | asize = prec; |
| 50 | } |
| 51 | |
| 52 | r->_mp_exp = u->_mp_exp; |
| 53 | r->_mp_size = size >= 0 ? asize : -asize; |
| 54 | MPN_COPY_INCR (rp, up, asize); |
| 55 | } |