/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  This file is part of systemd.

  Copyright 2013 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <errno.h>

#include "sd-bus.h"

#include "bus-type.h"

bool bus_type_is_valid(char c) {
        static const char valid[] = {
                SD_BUS_TYPE_BYTE,
                SD_BUS_TYPE_BOOLEAN,
                SD_BUS_TYPE_INT16,
                SD_BUS_TYPE_UINT16,
                SD_BUS_TYPE_INT32,
                SD_BUS_TYPE_UINT32,
                SD_BUS_TYPE_INT64,
                SD_BUS_TYPE_UINT64,
                SD_BUS_TYPE_DOUBLE,
                SD_BUS_TYPE_STRING,
                SD_BUS_TYPE_OBJECT_PATH,
                SD_BUS_TYPE_SIGNATURE,
                SD_BUS_TYPE_ARRAY,
                SD_BUS_TYPE_VARIANT,
                SD_BUS_TYPE_STRUCT,
                SD_BUS_TYPE_DICT_ENTRY,
                SD_BUS_TYPE_UNIX_FD
        };

        return !!memchr(valid, c, sizeof(valid));
}

bool bus_type_is_valid_in_signature(char c) {
        static const char valid[] = {
                SD_BUS_TYPE_BYTE,
                SD_BUS_TYPE_BOOLEAN,
                SD_BUS_TYPE_INT16,
                SD_BUS_TYPE_UINT16,
                SD_BUS_TYPE_INT32,
                SD_BUS_TYPE_UINT32,
                SD_BUS_TYPE_INT64,
                SD_BUS_TYPE_UINT64,
                SD_BUS_TYPE_DOUBLE,
                SD_BUS_TYPE_STRING,
                SD_BUS_TYPE_OBJECT_PATH,
                SD_BUS_TYPE_SIGNATURE,
                SD_BUS_TYPE_ARRAY,
                SD_BUS_TYPE_VARIANT,
                SD_BUS_TYPE_STRUCT_BEGIN,
                SD_BUS_TYPE_STRUCT_END,
                SD_BUS_TYPE_DICT_ENTRY_BEGIN,
                SD_BUS_TYPE_DICT_ENTRY_END,
                SD_BUS_TYPE_UNIX_FD
        };

        return !!memchr(valid, c, sizeof(valid));
}

bool bus_type_is_basic(char c) {
        static const char valid[] = {
                SD_BUS_TYPE_BYTE,
                SD_BUS_TYPE_BOOLEAN,
                SD_BUS_TYPE_INT16,
                SD_BUS_TYPE_UINT16,
                SD_BUS_TYPE_INT32,
                SD_BUS_TYPE_UINT32,
                SD_BUS_TYPE_INT64,
                SD_BUS_TYPE_UINT64,
                SD_BUS_TYPE_DOUBLE,
                SD_BUS_TYPE_STRING,
                SD_BUS_TYPE_OBJECT_PATH,
                SD_BUS_TYPE_SIGNATURE,
                SD_BUS_TYPE_UNIX_FD
        };

        return !!memchr(valid, c, sizeof(valid));
}

bool bus_type_is_trivial(char c) {
        static const char valid[] = {
                SD_BUS_TYPE_BYTE,
                SD_BUS_TYPE_BOOLEAN,
                SD_BUS_TYPE_INT16,
                SD_BUS_TYPE_UINT16,
                SD_BUS_TYPE_INT32,
                SD_BUS_TYPE_UINT32,
                SD_BUS_TYPE_INT64,
                SD_BUS_TYPE_UINT64,
                SD_BUS_TYPE_DOUBLE
        };

        return !!memchr(valid, c, sizeof(valid));
}

bool bus_type_is_container(char c) {
        static const char valid[] = {
                SD_BUS_TYPE_ARRAY,
                SD_BUS_TYPE_VARIANT,
                SD_BUS_TYPE_STRUCT,
                SD_BUS_TYPE_DICT_ENTRY
        };

        return !!memchr(valid, c, sizeof(valid));
}

int bus_type_get_alignment(char c) {

        switch (c) {
        case SD_BUS_TYPE_BYTE:
        case SD_BUS_TYPE_SIGNATURE:
        case SD_BUS_TYPE_VARIANT:
                return 1;

        case SD_BUS_TYPE_INT16:
        case SD_BUS_TYPE_UINT16:
                return 2;

        case SD_BUS_TYPE_BOOLEAN:
        case SD_BUS_TYPE_INT32:
        case SD_BUS_TYPE_UINT32:
        case SD_BUS_TYPE_STRING:
        case SD_BUS_TYPE_OBJECT_PATH:
        case SD_BUS_TYPE_ARRAY:
        case SD_BUS_TYPE_UNIX_FD:
                return 4;

        case SD_BUS_TYPE_INT64:
        case SD_BUS_TYPE_UINT64:
        case SD_BUS_TYPE_DOUBLE:
        case SD_BUS_TYPE_STRUCT:
        case SD_BUS_TYPE_STRUCT_BEGIN:
        case SD_BUS_TYPE_DICT_ENTRY:
        case SD_BUS_TYPE_DICT_ENTRY_BEGIN:
                return 8;
        }

        return -EINVAL;
}

int bus_type_get_size(char c) {

        switch (c) {
        case SD_BUS_TYPE_BYTE:
                return 1;

        case SD_BUS_TYPE_INT16:
        case SD_BUS_TYPE_UINT16:
                return 2;

        case SD_BUS_TYPE_BOOLEAN:
        case SD_BUS_TYPE_INT32:
        case SD_BUS_TYPE_UINT32:
        case SD_BUS_TYPE_UNIX_FD:
                return 4;

        case SD_BUS_TYPE_INT64:
        case SD_BUS_TYPE_UINT64:
        case SD_BUS_TYPE_DOUBLE:
                return 8;
        }

        return -EINVAL;
}
