xref: /illumos-gate/usr/src/lib/libc/sparcv9/gen/ecvt.c (revision 7257d1b4)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 /*
33  *	ecvt converts to decimal
34  *	the number of digits is specified by ndigit
35  *	decpt is set to the position of the decimal point
36  *	sign is set to 0 for positive, 1 for negative
37  *
38  */
39 
40 #pragma weak _ecvt = ecvt
41 #pragma weak _fcvt = fcvt
42 
43 #include "lint.h"
44 #include <sys/types.h>
45 #include <stdlib.h>
46 #include <floatingpoint.h>
47 #include "tsd.h"
48 
49 char *
ecvt(double number,int ndigits,int * decpt,int * sign)50 ecvt(double number, int ndigits, int *decpt, int *sign)
51 {
52 	char *buf = tsdalloc(_T_ECVT, DECIMAL_STRING_LENGTH, NULL);
53 
54 	return (econvert(number, ndigits, decpt, sign, buf));
55 }
56 
57 char *
fcvt(double number,int ndigits,int * decpt,int * sign)58 fcvt(double number, int ndigits, int *decpt, int *sign)
59 {
60 	char *buf = tsdalloc(_T_ECVT, DECIMAL_STRING_LENGTH, NULL);
61 	char *ptr, *val;
62 	char ch;
63 	int deci_val;
64 
65 	ptr = fconvert(number, ndigits, decpt, sign, buf);
66 
67 	val = ptr;
68 	deci_val = *decpt;
69 
70 	while ((ch = *ptr) != 0) {
71 		if (ch != '0') { /* You execute this if there are no */
72 				    /* leading zero's remaining. */
73 			*decpt = deci_val; /* If there are leading zero's */
74 			return (ptr);		/* gets updated. */
75 		}
76 		ptr++;
77 		deci_val--;
78 	}
79 	return (val);
80 }
81 
82 char *
qecvt(number,ndigits,decpt,sign)83 qecvt(number, ndigits, decpt, sign)
84 	long double	number;
85 	int		ndigits;
86 	int		*decpt;
87 	int		*sign;
88 {
89 	char *buf = tsdalloc(_T_ECVT, DECIMAL_STRING_LENGTH, NULL);
90 
91 	return (qeconvert(&number, ndigits, decpt, sign, buf));
92 }
93 
94 char *
qfcvt(long double number,int ndigits,int * decpt,int * sign)95 qfcvt(long double number, int ndigits, int *decpt, int *sign)
96 {
97 	char *buf = tsdalloc(_T_ECVT, DECIMAL_STRING_LENGTH, NULL);
98 
99 	return (qfconvert(&number, ndigits, decpt, sign, buf));
100 }
101 
102 char *
qgcvt(long double number,int ndigits,char * buffer)103 qgcvt(long double number, int ndigits, char *buffer)
104 {
105 	return (qgconvert(&number, ndigits, 0, buffer));
106 }
107