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/* Copyright (c) 2005, Dmitry Xmelkov
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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 are met:
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* 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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* 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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* Neither the name of the copyright holders nor the names of
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN 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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/* $Id: dtostre.c,v 1.2 2007/11/04 01:06:42 dmix Exp $ */
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#include <avr/pgmspace.h>
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#include "ftoa_engine.h"
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dtostre (double val, char *sbeg, unsigned char prec, unsigned char flags)
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__attribute__((progmem)) static char str_nan[2][4] =
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__attribute__((progmem)) static char str_inf[2][sizeof(str_nan[0])] =
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if (prec > 7) prec = 7;
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exp = __ftoa_engine (val, sbeg, prec, 0);
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if ((vtype & FTOA_MINUS) && !(vtype & FTOA_NAN)) /* like 'Glibc' */
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else if (flags & DTOSTR_PLUS_SIGN)
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else if (flags & DTOSTR_ALWAYS_SIGN)
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if (vtype & FTOA_NAN) {
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if (vtype & FTOA_INF) {
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if (flags & DTOSTR_UPPERCASE)
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s += sizeof(str_nan[0]);
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if ( (*d++ = *s++) != '1')
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vtype &= ~FTOA_CARRY; /* for possible exponent "-00" */
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*d++ = (flags & DTOSTR_UPPERCASE) ? 'E' : 'e';
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} else if (exp == 0 && (vtype & FTOA_CARRY) != 0) {
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for (prec = '0'; exp >= 10; exp -= 10)
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/*** end of file ***/