64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/*---------------------------------------------------------------------------
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*
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* Ryu floating-point output.
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*
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* Portions Copyright (c) 2018-2019, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/include/common/shortest_dec.h
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*
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* This is a modification of code taken from github.com/ulfjack/ryu under the
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* terms of the Boost license (not the Apache license). The original copyright
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* notice follows:
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*
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* Copyright 2018 Ulf Adams
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*
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* The contents of this file may be used under the terms of the Apache
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* License, Version 2.0.
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*
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* (See accompanying file LICENSE-Apache or copy at
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* http://www.apache.org/licenses/LICENSE-2.0)
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*
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* Alternatively, the contents of this file may be used under the terms of the
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* Boost Software License, Version 1.0.
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*
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* (See accompanying file LICENSE-Boost or copy at
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* https://www.boost.org/LICENSE_1_0.txt)
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*
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* Unless required by applicable law or agreed to in writing, this software is
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* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied.
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*
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*---------------------------------------------------------------------------
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*/
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#ifndef SHORTEST_DEC_H
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#define SHORTEST_DEC_H
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/*----
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* The length of 25 comes from:
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*
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* Case 1: -9.9999999999999999e-299 = 24 bytes, plus 1 for null
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*
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* Case 2: -0.00099999999999999999 = 23 bytes, plus 1 for null
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*/
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#define DOUBLE_SHORTEST_DECIMAL_LEN 25
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int double_to_shortest_decimal_bufn(double f, char *result);
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int double_to_shortest_decimal_buf(double f, char *result);
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char *double_to_shortest_decimal(double f);
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/*
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* The length of 16 comes from:
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*
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* Case 1: -9.99999999e+29 = 15 bytes, plus 1 for null
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*
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* Case 2: -0.000999999999 = 15 bytes, plus 1 for null
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*/
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#define FLOAT_SHORTEST_DECIMAL_LEN 16
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int float_to_shortest_decimal_bufn(float f, char *result);
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int float_to_shortest_decimal_buf(float f, char *result);
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char *float_to_shortest_decimal(float f);
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#endif /* SHORTEST_DEC_H */
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