form/common/ty_num.c

/*
 * 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.
 */

#pragma ident   "%Z%%M% %I% %E% SMI" /* SVr4.0 1.2 */

/*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));
}