/*--------------------------------------------------------------------------- * * Ryu floating-point output. * * Portions Copyright (c) 2018-2021, PostgreSQL Global Development Group * * IDENTIFICATION * src/include/common/shortest_dec.h * * This is a modification of code taken from github.com/ulfjack/ryu under the * terms of the Boost license (not the Apache license). The original copyright * notice follows: * * Copyright 2018 Ulf Adams * * The contents of this file may be used under the terms of the Apache * License, Version 2.0. * * (See accompanying file LICENSE-Apache or copy at * http://www.apache.org/licenses/LICENSE-2.0) * * Alternatively, the contents of this file may be used under the terms of the * Boost Software License, Version 1.0. * * (See accompanying file LICENSE-Boost or copy at * https://www.boost.org/LICENSE_1_0.txt) * * Unless required by applicable law or agreed to in writing, this software is * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. * *--------------------------------------------------------------------------- */ #ifndef SHORTEST_DEC_H #define SHORTEST_DEC_H /*---- * The length of 25 comes from: * * Case 1: -9.9999999999999999e-299 = 24 bytes, plus 1 for null * * Case 2: -0.00099999999999999999 = 23 bytes, plus 1 for null */ #define DOUBLE_SHORTEST_DECIMAL_LEN 25 int double_to_shortest_decimal_bufn(double f, char *result); int double_to_shortest_decimal_buf(double f, char *result); char *double_to_shortest_decimal(double f); /* * The length of 16 comes from: * * Case 1: -9.99999999e+29 = 15 bytes, plus 1 for null * * Case 2: -0.000999999999 = 15 bytes, plus 1 for null */ #define FLOAT_SHORTEST_DECIMAL_LEN 16 int float_to_shortest_decimal_bufn(float f, char *result); int float_to_shortest_decimal_buf(float f, char *result); char *float_to_shortest_decimal(float f); #endif /* SHORTEST_DEC_H */