/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 (c) 1988 AT&T */
/*        All Rights Reserved   */


/*
 *      Copyright (c) 1997, by Sun Microsystems, Inc.
 *      All rights reserved.
 */

/*LINTLIBRARY*/

#include <sys/types.h>
#include <stdlib.h>
#include "utility.h"

/*
 *      TYPE_NUMERIC standard type
 *
 *      usage:
 *              set_field_type(f, TYPE_NUMERIC, precision, vmin, vmax);
 *
 *              int precision;  digits to right of decimal point
 *              double vmin;    minimum acceptable value
 *              double vmax;    maximum acceptable value
 */
static char *make_num(va_list *);
static char *copy_num(char *);
static void free_num(char *);
static int fcheck_num(FIELD *, char *);
static int ccheck_num(int, char *);

typedef struct {

        int     prec;
        double  vmin;
        double  vmax;
} NUMERIC;

static FIELDTYPE typeNUMERIC =
{
                                ARGS,                   /* status       */
                                1,                      /* ref          */
                                (FIELDTYPE *) 0,        /* left         */
                                (FIELDTYPE *) 0,        /* right        */
                                make_num,               /* makearg      */
                                copy_num,               /* copyarg      */
                                free_num,               /* freearg      */
                                fcheck_num,             /* fcheck       */
                                ccheck_num,             /* ccheck       */
                                (PTF_int) 0,            /* next         */
                                (PTF_int) 0,            /* prev         */
};

FIELDTYPE * TYPE_NUMERIC = &typeNUMERIC;

static char *
make_num(va_list *ap)
{
        NUMERIC * n;

        if (Alloc(n, NUMERIC)) {
                n -> prec = va_arg(*ap, int);
                n -> vmin = va_arg(*ap, double);
                n -> vmax = va_arg(*ap, double);
        }
        return ((char *) n);
}

static char *
copy_num(char *arg)
{
        NUMERIC *n;

        if (Alloc(n, NUMERIC))
                *n = *((NUMERIC *) arg);
        return ((char *) n);
}

static void
free_num(char *arg)
{
        Free(arg);
}

static int
fcheck_num(FIELD *f, char *arg)
{
        NUMERIC *       n = (NUMERIC *) arg;
        double          vmin = n -> vmin;
        double          vmax = n -> vmax;
        int             prec = n -> prec;
        char *          x = field_buffer(f, 0);
        char            buf[80];

        while (*x && *x == ' ')
                ++x;
        if (*x) {
                char * t = x;

                if (*x == '-')
                        ++x;
                while (*x && isdigit(*x))
                        ++x;
                if (*x == '.') {
                        ++x;
                        while (*x && isdigit(*x))
                                ++x;
                }
                while (*x && *x == ' ')
                        ++x;
                if (! *x) {
                        double v = atof(t);

                        if (vmin >= vmax || (v >= vmin && v <= vmax)) {
                                (void) sprintf(buf, "%.*f", prec, v);
                                (void) set_field_buffer(f, 0, buf);
                                return (TRUE);
                        }
                }
        }
        return (FALSE);
}

#define charok(c)       (isdigit(c) || c == '-' || c == '.')

/*ARGSUSED*/

static int
ccheck_num(int c, char *arg)
{
        return (charok(c));
}