278 lines
5.3 KiB
C
278 lines
5.3 KiB
C
/****************************************************************************
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* libs/libc/stdio/lib_dtoa_data.c
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*
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* Copyright © 2018, Keith Packard
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include "lib_dtoa_engine.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef DBL_MAX_10_EXP
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# error DBL_MAX_10_EXP
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#endif
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#ifndef DBL_MIN_10_EXP
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# error DBL_MIN_10_EXP
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#endif
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#ifndef DBL_DIG
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# error DBL_DIG
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#endif
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/* Make sure the computed sizes of the arrays match the actual sizes
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* by declaring an array which is legal if the sizes match and illegal
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* if they do not
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*/
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#define count_of(n) (sizeof (n) / sizeof (n[0]))
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#define match(array,size) (count_of(array) == size)
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#define check_match(array,size) (match(array, size) ? 1 : -1)
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/****************************************************************************
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* Public Data
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****************************************************************************/
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const double_t g_dtoa_scale_up[] =
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{
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#if DBL_MAX_10_EXP >= 1
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1e1,
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#endif
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#if DBL_MAX_10_EXP >= 2
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1e2,
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#endif
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#if DBL_MAX_10_EXP >= 4
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1e4,
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#endif
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#if DBL_MAX_10_EXP >= 8
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1e8,
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#endif
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#if DBL_MAX_10_EXP >= 16
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1e16,
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#endif
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#if DBL_MAX_10_EXP >= 32
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1e32,
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#endif
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#if DBL_MAX_10_EXP >= 64
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1e64,
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#endif
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#if DBL_MAX_10_EXP >= 128
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1e128,
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#endif
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#if DBL_MAX_10_EXP >= 256
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1e256,
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#endif
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#if DBL_MAX_10_EXP >= 512
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1e512,
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#endif
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#if DBL_MAX_10_EXP >= 1024
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1e1024,
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#endif
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#if DBL_MAX_10_EXP >= 2048
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1e2048,
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#endif
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#if DBL_MAX_10_EXP >= 4096
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1e4096,
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#endif
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#if DBL_MAX_10_EXP >= 8192
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1e8192,
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#endif
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#if DBL_MAX_10_EXP >= 16384
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1e16384,
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#endif
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#if DBL_MAX_10_EXP >= 32768
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1e32768,
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#endif
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#if DBL_MAX_10_EXP >= 65536
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1e65536,
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#endif
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};
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const double_t g_dtoa_scale_down[] =
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{
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#if DBL_MIN_10_EXP <= -1
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1e-1,
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#endif
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#if DBL_MIN_10_EXP <= -2
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1e-2,
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#endif
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#if DBL_MIN_10_EXP <= -4
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1e-4,
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#endif
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#if DBL_MIN_10_EXP <= -8
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1e-8,
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#endif
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#if DBL_MIN_10_EXP <= -16
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1e-16,
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#endif
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#if DBL_MIN_10_EXP <= -32
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1e-32,
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#endif
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#if DBL_MIN_10_EXP <= -64
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1e-64,
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#endif
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#if DBL_MIN_10_EXP <= -128
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1e-128,
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#endif
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#if DBL_MIN_10_EXP <= -256
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1e-256,
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#endif
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#if DBL_MIN_10_EXP <= -512
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1e-512,
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#endif
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#if DBL_MIN_10_EXP <= -1024
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1e-1024,
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#endif
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#if DBL_MIN_10_EXP <= -2048
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1e-2048,
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#endif
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#if DBL_MIN_10_EXP <= -4096
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1e-4096,
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#endif
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#if DBL_MIN_10_EXP <= -8192
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1e-8192,
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#endif
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#if DBL_MIN_10_EXP <= -16384
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1e-16384,
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#endif
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#if DBL_MIN_10_EXP <= -32768
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1e-32768,
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#endif
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#if DBL_MIN_10_EXP <= -65536
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1e-65536,
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#endif
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};
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const double_t g_dtoa_round[] =
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{
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#if DBL_DIG >= 30
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5e30,
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#endif
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#if DBL_DIG >= 29
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5e29,
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#endif
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#if DBL_DIG >= 28
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5e28,
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#endif
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#if DBL_DIG >= 27
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5e27,
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#endif
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#if DBL_DIG >= 26
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5e26,
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#endif
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#if DBL_DIG >= 25
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5e25,
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#endif
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#if DBL_DIG >= 24
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5e24,
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#endif
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#if DBL_DIG >= 23
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5e23,
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#endif
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#if DBL_DIG >= 22
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5e22,
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#endif
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#if DBL_DIG >= 21
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5e21,
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#endif
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#if DBL_DIG >= 20
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5e20,
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#endif
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#if DBL_DIG >= 19
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5e19,
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#endif
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#if DBL_DIG >= 18
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5e18,
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#endif
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#if DBL_DIG >= 17
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5e17,
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#endif
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#if DBL_DIG >= 16
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5e16,
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#endif
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#if DBL_DIG >= 15
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5e15,
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#endif
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#if DBL_DIG >= 14
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5e14,
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#endif
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#if DBL_DIG >= 13
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5e13,
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#endif
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#if DBL_DIG >= 12
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5e12,
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#endif
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#if DBL_DIG >= 11
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5e11,
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#endif
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#if DBL_DIG >= 10
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5e10,
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#endif
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#if DBL_DIG >= 9
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5e9,
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#endif
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#if DBL_DIG >= 8
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5e8,
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#endif
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#if DBL_DIG >= 7
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5e7,
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#endif
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#if DBL_DIG >= 6
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5e6,
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#endif
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#if DBL_DIG >= 5
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5e5,
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#endif
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#if DBL_DIG >= 4
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5e4,
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#endif
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#if DBL_DIG >= 3
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5e3,
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#endif
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#if DBL_DIG >= 2
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5e2,
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#endif
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#if DBL_DIG >= 1
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5e1,
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#endif
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#if DBL_DIG >= 0
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5e0,
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#endif
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};
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