/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 Damien P. George
 * Copyright (c) Quectel Wireless Solution, Co., Ltd.All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <assert.h>
#include <string.h>

#include "py/obj.h"
#include "py/mperrno.h"

#if MICROPY_PY_UERRNO

// This list can be defined per port in mpconfigport.h to tailor it to a
// specific port's needs. If it's not defined then we provide a default.
#ifndef MICROPY_PY_UERRNO_LIST
#define MICROPY_PY_UERRNO_LIST \
 X(EPERM) \
 X(ENOENT) \
 X(EIO) \
 X(EBADF) \
 X(EAGAIN) \
 X(ENOMEM) \
 X(EACCES) \
 X(EEXIST) \
 X(ENODEV) \
 X(EISDIR) \
 X(EINVAL) \
 X(EOPNOTSUPP) \
 X(EADDRINUSE) \
 X(ECONNABORTED) \
 X(ECONNRESET) \
 X(ENOBUFS) \
 X(ENOTCONN) \
 X(ETIMEDOUT) \
 X(ECONNREFUSED) \
 X(EHOSTUNREACH) \
 X(EALREADY) \
 X(EINPROGRESS) \

#endif

#if MICROPY_PY_UERRNO_ERRORCODE
STATIC const mp_rom_map_elem_t errorcode_table[] = {
 #define X(e) { MP_ROM_INT(MP_##e), MP_ROM_QSTR(MP_QSTR_##e) },
 MICROPY_PY_UERRNO_LIST
#undef X
};

STATIC const mp_obj_dict_t errorcode_dict = {
 .base = {&mp_type_dict},
 .map = {
 .all_keys_are_qstrs = 0, // keys are integers
 .is_fixed = 1,
 .is_ordered = 1,
 .used = MP_ARRAY_SIZE(errorcode_table),
 .alloc = MP_ARRAY_SIZE(errorcode_table),
 .table = (mp_map_elem_t *)(mp_rom_map_elem_t *)errorcode_table,
 },
};
#endif

STATIC const mp_rom_map_elem_t mp_module_uerrno_globals_table[] = {
 { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uerrno) },
 #if MICROPY_PY_UERRNO_ERRORCODE
 { MP_ROM_QSTR(MP_QSTR_errorcode), MP_ROM_PTR(&errorcode_dict) },
 #endif

 #define X(e) { MP_ROM_QSTR(MP_QSTR_##e), MP_ROM_INT(MP_##e) },
 MICROPY_PY_UERRNO_LIST
#undef X
};

STATIC MP_DEFINE_CONST_DICT(mp_module_uerrno_globals, mp_module_uerrno_globals_table);

const mp_obj_module_t mp_module_uerrno = {
 .base = { &mp_type_module },
 .globals = (mp_obj_dict_t *)&mp_module_uerrno_globals,
};

qstr mp_errno_to_str(mp_obj_t errno_val) {
 #if MICROPY_PY_UERRNO_ERRORCODE
 // We have the errorcode dict so can do a lookup using the hash map
 mp_map_elem_t *elem = mp_map_lookup((mp_map_t *)&errorcode_dict.map, errno_val, MP_MAP_LOOKUP);
 if (elem == NULL) {
 return MP_QSTRnull;
 } else {
 return MP_OBJ_QSTR_VALUE(elem->value);
 }
 #else
 // We don't have the errorcode dict so do a simple search in the modules dict
 for (size_t i = 0; i < MP_ARRAY_SIZE(mp_module_uerrno_globals_table); ++i) {
 if (errno_val == mp_module_uerrno_globals_table[i].value) {
 return MP_OBJ_QSTR_VALUE(mp_module_uerrno_globals_table[i].key);
 }
 }
 return MP_QSTRnull;
 #endif
}

#endif // MICROPY_PY_UERRNO