form/common/ty_alnum.c

	ty_alnum.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * 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 1.1 */

/*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));
}