/*
 * 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 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <project.h>
#include <string.h>
#include <stdlib.h>
#include "files_common.h"

static uint_t
hash_projname(nss_XbyY_args_t *argp, int keyhash, const char *line,
                int linelen) {

        const char      *name;
        int             namelen, i;
        uint_t          hash = 0;

        if (keyhash) {
                name = argp->key.name;
                namelen = strlen(name);
        } else {
                name = line;
                namelen = 0;
                while (linelen-- && *line++ != ':')
                        namelen++;
        }

        for (i = 0; i < namelen; i++)
                hash = hash * 15 + name[i];
        return (hash);
}

static uint_t
hash_projid(nss_XbyY_args_t *argp, int keyhash, const char *line,
                int linelen) {

        uint_t          id;
        const char      *linep, *limit, *end;

        linep = line;
        limit = line + linelen;

        if (keyhash)
                return ((uint_t)argp->key.projid);

        /* skip projname */
        while (linep < limit && *linep++ != ':');
        if (linep == limit)
                return (0);

        /* projid */
        end = linep;
        id = (uint_t)strtol(linep, (char **)&end, 10);
        if (linep == end)
                return (0);

        return (id);
}

static files_hash_func hash_proj[2] = {
        hash_projname,
        hash_projid
};

static files_hash_t hashinfo = {
        DEFAULTMUTEX,
        sizeof (struct project),
        NSS_BUFLEN_PROJECT,
        2,
        hash_proj
};

static int
check_projid(nss_XbyY_args_t *argp, const char *line, int linelen) {
        projid_t        projid;
        const char      *linep, *limit, *end;

        linep = line;
        limit = line + linelen;

        /* skip projname */
        while (linep < limit && *linep++ != ':');

        /* empty projname not allowed */
        if (linep == limit || linep == line + 1)
                return (0);

        /* projid */
        end = linep;
        projid = (projid_t)strtol(linep, (char **)&end, 10);

        /* empty projid is not valid */
        if (linep == end)
                return (0);

        return (projid == argp->key.projid);
}

static nss_status_t
getbyname(files_backend_ptr_t be, void *a) {
        return (_nss_files_XY_hash(be, a, 0, &hashinfo, 0,
                        _nss_files_check_name_colon));
}

static nss_status_t
getbyprojid(files_backend_ptr_t be, void *a) {
        return (_nss_files_XY_hash(be, a, 0, &hashinfo, 1, check_projid));
}

static files_backend_op_t project_ops[] = {
        _nss_files_destr,
        _nss_files_endent,
        _nss_files_setent,
        _nss_files_getent_rigid,
        getbyname,
        getbyprojid
};

/*ARGSUSED*/
nss_backend_t *
_nss_files_project_constr(dummy1, dummy2, dummy3)
        const char *dummy1, *dummy2, *dummy3;
{
        return (_nss_files_constr(project_ops,
                    sizeof (project_ops) / sizeof (project_ops[0]),
                    PROJF_PATH,
                    NSS_LINELEN_PROJECT,
                    &hashinfo));
}