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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright © 2022 Keith Packard
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define _GNU_SOURCE
#include "ftoa_engine.h"
#include <_ansi.h>
#include <stdlib.h>
#include <string.h>
int
ecvtf_r (float invalue,
int ndigit,
int *decpt,
int *sign,
char *buf,
size_t len)
{
struct ftoa ftoa;
int ngot;
if (ndigit < 0)
ndigit = 0;
if ((size_t) ndigit > len - 1)
return -1;
ngot = __ftoa_engine(invalue, &ftoa, ndigit, false, 0);
*sign = !!(ftoa.flags & FTOA_MINUS);
*decpt = ftoa.exp + 1;
memset(buf, '0', ndigit);
memcpy(buf, ftoa.digits, ngot);
buf[ndigit] = '\0';
return 0;
}
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