/*
 * 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_ALNUM
 *
 *      usage:
 *              set_field_type(f, TYPE_ALNUM, width);
 *
 *              int width;      minimum token width
 */
static char * make_alnum(va_list *);
static char * copy_alnum(char *);
static void free_alnum(char *);
static int fcheck_alnum(FIELD *, char *);
static int ccheck_alnum(int, char *);

static FIELDTYPE typeALNUM =
{
                                ARGS,                   /* status       */
                                1,                      /* ref          */
                                (FIELDTYPE *) 0,        /* left         */
                                (FIELDTYPE *) 0,        /* right        */
                                make_alnum,             /* makearg      */
                                copy_alnum,             /* copyarg      */
                                free_alnum,             /* freearg      */
                                fcheck_alnum,           /* fcheck       */
                                ccheck_alnum,           /* ccheck       */
                                (PTF_int) 0,            /* next         */
                                (PTF_int) 0,            /* prev         */
};

FIELDTYPE * TYPE_ALNUM = &typeALNUM;

static char *
make_alnum(va_list *ap)
{
        int * width;

        if (Alloc(width, int))
                *width = va_arg(*ap, int);
        return ((char *) width);
}

static char *
copy_alnum(char *arg)
{
        int * width;

        if (Alloc(width, int))
                *width = *((int *) arg);
        return ((char *) width);
}

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

static int
fcheck_alnum(FIELD *f, char *arg)
{
        int     width   = *((int *) arg);
        int     n       = 0;
        char    *v      = field_buffer(f, 0);

        while (*v && *v == ' ')
                ++v;
        if (*v) {
                char * vbeg = v;
                while (*v && isalnum(*v))
                        ++v;
                n = (int) (v - vbeg);
                while (*v && *v == ' ')
                        ++v;
        }
        return (*v || n < width ? FALSE : TRUE);
}

/*ARGSUSED*/
static int
ccheck_alnum(int c, char *arg)
{
        return (isalnum(c));
}