amd64/gen/ecvt.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 *  ecvt converts to decimal
 *  the number of digits is specified by ndigit
 *  decpt is set to the position of the decimal point
 *  sign is set to 0 for positive, 1 for negative
 *
 */

#pragma weak _ecvt = ecvt
#pragma weak _fcvt = fcvt

#include "lint.h"
#include <sys/types.h>
#include <stdlib.h>
#include <floatingpoint.h>
#include "tsd.h"

char *
ecvt(number, ndigits, decpt, sign)
    double  number;
    int ndigits;
    int *decpt;
    int *sign;
{
    char *buf = tsdalloc(_T_ECVT, DECIMAL_STRING_LENGTH, NULL);

    return (econvert(number, ndigits, decpt, sign, buf));
}

char *
fcvt(number, ndigits, decpt, sign)
    double  number;
    int ndigits;
    int *decpt;
    int *sign;
{
    char *buf = tsdalloc(_T_ECVT, DECIMAL_STRING_LENGTH, NULL);
    char *ptr, *val;
    char ch;
    int deci_val;

    ptr = fconvert(number, ndigits, decpt, sign, buf);
    val = ptr;
    deci_val = *decpt;

    while ((ch = *ptr) != '\0') {
        if (ch != '0') { /* You execute this if there are no */
                /* leading zero's remaining. */
            *decpt = deci_val; /* If there are leading zero's */
            return (ptr);   /* gets updated. */
        }
        ptr++;
        deci_val--;
    }
    return (val);
}

char *
qecvt(number, ndigits, decpt, sign)
    long double number;
    int     ndigits;
    int     *decpt;
    int     *sign;
{
    char *buf = tsdalloc(_T_ECVT, DECIMAL_STRING_LENGTH, NULL);

    return (qeconvert(&number, ndigits, decpt, sign, buf));
}

char *
qfcvt(number, ndigits, decpt, sign)
    long double number;
    int     ndigits;
    int     *decpt;
    int     *sign;
{
    char *buf = tsdalloc(_T_ECVT, DECIMAL_STRING_LENGTH, NULL);

    return (qfconvert(&number, ndigits, decpt, sign, buf));
}

char *
qgcvt(number, ndigits, buffer)
    long double number;
    int     ndigits;
    char        *buffer;
{
    return (qgconvert(&number, ndigits, 0, buffer));
}