Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gdtoa/ldtoa.c	Lines:	0	27	0.0 %
Date:	2017-11-07	Branches:	0	8	0.0 %


/*	$OpenBSD: ldtoa.c,v 1.4 2016/03/09 16:28:47 deraadt Exp $	*/
/*-
 * Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
 * All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

#include <sys/types.h>
#include <machine/ieee.h>
#include <float.h>
#include <stdint.h>
#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include "gdtoaimp.h"

#if (LDBL_MANT_DIG > DBL_MANT_DIG)

/*
 * ldtoa() is a wrapper for gdtoa() that makes it smell like dtoa(),
 * except that the floating point argument is passed by reference.
 * When dtoa() is passed a NaN or infinity, it sets expt to 9999.
 * However, a long double could have a valid exponent of 9999, so we
 * use INT_MAX in ldtoa() instead.
 */
char *
__ldtoa(long double *ld, int mode, int ndigits, int *decpt, int *sign,
    char **rve)
{
	FPI fpi = {
		LDBL_MANT_DIG,			/* nbits */
		LDBL_MIN_EXP - LDBL_MANT_DIG,	/* emin */
		LDBL_MAX_EXP - LDBL_MANT_DIG,	/* emax */
		FLT_ROUNDS,	       		/* rounding */
#ifdef Sudden_Underflow	/* unused, but correct anyway */
		1
#else
		0
#endif
	};
	int be, kind;
	char *ret;
	struct ieee_ext *p = (struct ieee_ext *)ld;
	uint32_t bits[(LDBL_MANT_DIG + 31) / 32];
	void *vbits = bits;

	/*
	 * gdtoa doesn't know anything about the sign of the number, so
	 * if the number is negative, we need to swap rounding modes of
	 * 2 (upwards) and 3 (downwards).
	 */
	*sign = p->ext_sign;
	fpi.rounding ^= (fpi.rounding >> 1) & p->ext_sign;

	be = p->ext_exp - (LDBL_MAX_EXP - 1) - (LDBL_MANT_DIG - 1);
	EXT_TO_ARRAY32(p, bits);

	switch (fpclassify(*ld)) {
	case FP_NORMAL:
		kind = STRTOG_Normal;
#ifdef EXT_IMPLICIT_NBIT
		bits[LDBL_MANT_DIG / 32] |= 1 << ((LDBL_MANT_DIG - 1) % 32);
#endif /* EXT_IMPLICIT_NBIT */
		break;
	case FP_ZERO:
		kind = STRTOG_Zero;
		break;
	case FP_SUBNORMAL:
		kind = STRTOG_Denormal;
		be++;
		break;
	case FP_INFINITE:
		kind = STRTOG_Infinite;
		break;
	case FP_NAN:
		kind = STRTOG_NaN;
		break;
	default:
		abort();
	}

	ret = gdtoa(&fpi, be, vbits, &kind, mode, ndigits, decpt, rve);
	if (*decpt == -32768)
		*decpt = INT_MAX;
	return ret;
}
DEF_STRONG(__ldtoa);

#else   /* (LDBL_MANT_DIG == DBL_MANT_DIG) */

char *
__ldtoa(long double *ld, int mode, int ndigits, int *decpt, int *sign,
    char **rve)
{
	char *ret;

	ret = dtoa((double)*ld, mode, ndigits, decpt, sign, rve);
	if (*decpt == 9999)
		*decpt = INT_MAX;
	return ret;
}
DEF_STRONG(__ldtoa);

#endif  /* (LDBL_MANT_DIG == DBL_MANT_DIG) */


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ldtoa.c,v 1.4 2016/03/09 16:28:47 deraadt Exp $ */
2			/*-
3			* Copyright (c) 2003 David Schultz <das@FreeBSD.ORG>
4			* All rights reserved.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			* 2. Redistributions in binary form must reproduce the above copyright
12			* notice, this list of conditions and the following disclaimer in the
13			* documentation and/or other materials provided with the distribution.
14			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25			* SUCH DAMAGE.
26			*/
27
28			#include <sys/types.h>
29			#include <machine/ieee.h>
30			#include <float.h>
31			#include <stdint.h>
32			#include <limits.h>
33			#include <math.h>
34			#include <stdlib.h>
35			#include "gdtoaimp.h"
36
37			#if (LDBL_MANT_DIG > DBL_MANT_DIG)
38
39			/*
40			* ldtoa() is a wrapper for gdtoa() that makes it smell like dtoa(),
41			* except that the floating point argument is passed by reference.
42			* When dtoa() is passed a NaN or infinity, it sets expt to 9999.
43			* However, a long double could have a valid exponent of 9999, so we
44			* use INT_MAX in ldtoa() instead.
45			*/
46			char *
47			__ldtoa(long double ld, int mode, int ndigits, int decpt, int *sign,
48			char **rve)
49			{
50			FPI fpi = {
51			LDBL_MANT_DIG, /* nbits */
52			LDBL_MIN_EXP - LDBL_MANT_DIG, /* emin */
53			LDBL_MAX_EXP - LDBL_MANT_DIG, /* emax */
54			FLT_ROUNDS, /* rounding */
55			#ifdef Sudden_Underflow /* unused, but correct anyway */
56			1
57			#else
58			0
59			#endif
60			};
61			int be, kind;
62			char *ret;
63			struct ieee_ext p = (struct ieee_ext )ld;
64			uint32_t bits[(LDBL_MANT_DIG + 31) / 32];
65			void *vbits = bits;
66
67			/*
68			* gdtoa doesn't know anything about the sign of the number, so
69			* if the number is negative, we need to swap rounding modes of
70			* 2 (upwards) and 3 (downwards).
71			*/
72			*sign = p->ext_sign;
73			fpi.rounding ^= (fpi.rounding >> 1) & p->ext_sign;
74
75			be = p->ext_exp - (LDBL_MAX_EXP - 1) - (LDBL_MANT_DIG - 1);
76			EXT_TO_ARRAY32(p, bits);
77
78			switch (fpclassify(*ld)) {
79			case FP_NORMAL:
80			kind = STRTOG_Normal;
81			#ifdef EXT_IMPLICIT_NBIT
82			bits[LDBL_MANT_DIG / 32] \|= 1 << ((LDBL_MANT_DIG - 1) % 32);
83			#endif /* EXT_IMPLICIT_NBIT */
84			break;
85			case FP_ZERO:
86			kind = STRTOG_Zero;
87			break;
88			case FP_SUBNORMAL:
89			kind = STRTOG_Denormal;
90			be++;
91			break;
92			case FP_INFINITE:
93			kind = STRTOG_Infinite;
94			break;
95			case FP_NAN:
96			kind = STRTOG_NaN;
97			break;
98			default:
99			abort();
100			}
101
102			ret = gdtoa(&fpi, be, vbits, &kind, mode, ndigits, decpt, rve);
103			if (*decpt == -32768)
104			*decpt = INT_MAX;
105			return ret;
106			}
107			DEF_STRONG(__ldtoa);
108
109			#else /* (LDBL_MANT_DIG == DBL_MANT_DIG) */
110
111			char *
112			__ldtoa(long double ld, int mode, int ndigits, int decpt, int *sign,
113			char **rve)
114			{
115			char *ret;
116
117			ret = dtoa((double)*ld, mode, ndigits, decpt, sign, rve);
118			if (*decpt == 9999)
119			*decpt = INT_MAX;
120			return ret;
121			}
122			DEF_STRONG(__ldtoa);
123
124			#endif /* (LDBL_MANT_DIG == DBL_MANT_DIG) */