| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Compatibility functions for floating point formatting, long double version. |
| 2 | Copyright (C) 1996-2016 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <float.h> |
| 20 | |
| 21 | #define FLOAT_TYPE long double |
| 22 | #define FUNC_PREFIX q |
| 23 | #define FLOAT_FMT_FLAG "L" |
| 24 | /* Actually we have to write (LDBL_DIG + log10 (LDBL_MAX_10_EXP)) but |
| 25 | we don't have log10 available in the preprocessor. Since we cannot |
| 26 | assume anything on the used `long double' format be generous. */ |
| 27 | #define MAXDIG (NDIGIT_MAX + 12) |
| 28 | #define FCVT_MAXDIG (LDBL_MAX_10_EXP + MAXDIG) |
| 29 | #if LDBL_MANT_DIG == 64 |
| 30 | # define NDIGIT_MAX 21 |
| 31 | #elif LDBL_MANT_DIG == 53 |
| 32 | # define NDIGIT_MAX 17 |
| 33 | #elif LDBL_MANT_DIG == 113 |
| 34 | # define NDIGIT_MAX 36 |
| 35 | #elif LDBL_MANT_DIG == 106 |
| 36 | # define NDIGIT_MAX 34 |
| 37 | #elif LDBL_MANT_DIG == 56 |
| 38 | # define NDIGIT_MAX 18 |
| 39 | #else |
| 40 | /* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a |
| 41 | compile time constant here, so we cannot use it. */ |
| 42 | # error "NDIGIT_MAX must be precomputed" |
| 43 | # define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0))) |
| 44 | #endif |
| 45 | |
| 46 | #include "efgcvt.c" |