GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/gdtoa/ldtoa.c Lines: 0 27 0.0 %
Date: 2017-11-13 Branches: 0 8 0.0 %

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/*	$OpenBSD: ldtoa.c,v 1.4 2016/03/09 16:28:47 deraadt Exp $	*/
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/*-
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 * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
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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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 * 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 the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/types.h>
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#include <machine/ieee.h>
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#include <float.h>
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#include <stdint.h>
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#include <limits.h>
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#include <math.h>
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#include <stdlib.h>
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#include "gdtoaimp.h"
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#if (LDBL_MANT_DIG > DBL_MANT_DIG)
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/*
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 * ldtoa() is a wrapper for gdtoa() that makes it smell like dtoa(),
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 * except that the floating point argument is passed by reference.
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 * When dtoa() is passed a NaN or infinity, it sets expt to 9999.
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 * However, a long double could have a valid exponent of 9999, so we
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 * use INT_MAX in ldtoa() instead.
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 */
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char *
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__ldtoa(long double *ld, int mode, int ndigits, int *decpt, int *sign,
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    char **rve)
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{
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	FPI fpi = {
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		LDBL_MANT_DIG,			/* nbits */
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		LDBL_MIN_EXP - LDBL_MANT_DIG,	/* emin */
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		LDBL_MAX_EXP - LDBL_MANT_DIG,	/* emax */
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		FLT_ROUNDS,	       		/* rounding */
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#ifdef Sudden_Underflow	/* unused, but correct anyway */
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		1
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#else
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		0
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#endif
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	};
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	int be, kind;
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	char *ret;
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	struct ieee_ext *p = (struct ieee_ext *)ld;
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	uint32_t bits[(LDBL_MANT_DIG + 31) / 32];
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	void *vbits = bits;
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	/*
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	 * gdtoa doesn't know anything about the sign of the number, so
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	 * if the number is negative, we need to swap rounding modes of
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	 * 2 (upwards) and 3 (downwards).
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	 */
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	*sign = p->ext_sign;
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	fpi.rounding ^= (fpi.rounding >> 1) & p->ext_sign;
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	be = p->ext_exp - (LDBL_MAX_EXP - 1) - (LDBL_MANT_DIG - 1);
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	EXT_TO_ARRAY32(p, bits);
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	switch (fpclassify(*ld)) {
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	case FP_NORMAL:
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		kind = STRTOG_Normal;
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#ifdef EXT_IMPLICIT_NBIT
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		bits[LDBL_MANT_DIG / 32] |= 1 << ((LDBL_MANT_DIG - 1) % 32);
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#endif /* EXT_IMPLICIT_NBIT */
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		break;
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	case FP_ZERO:
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		kind = STRTOG_Zero;
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		break;
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	case FP_SUBNORMAL:
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		kind = STRTOG_Denormal;
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		be++;
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		break;
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	case FP_INFINITE:
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		kind = STRTOG_Infinite;
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		break;
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	case FP_NAN:
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		kind = STRTOG_NaN;
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		break;
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	default:
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		abort();
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	}
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	ret = gdtoa(&fpi, be, vbits, &kind, mode, ndigits, decpt, rve);
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	if (*decpt == -32768)
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		*decpt = INT_MAX;
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	return ret;
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}
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DEF_STRONG(__ldtoa);
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#else   /* (LDBL_MANT_DIG == DBL_MANT_DIG) */
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char *
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__ldtoa(long double *ld, int mode, int ndigits, int *decpt, int *sign,
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    char **rve)
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{
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	char *ret;
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	ret = dtoa((double)*ld, mode, ndigits, decpt, sign, rve);
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	if (*decpt == 9999)
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		*decpt = INT_MAX;
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	return ret;
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}
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DEF_STRONG(__ldtoa);
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#endif  /* (LDBL_MANT_DIG == DBL_MANT_DIG) */