kopia lustrzana https://github.com/espressif/esp-idf
127 wiersze
3.2 KiB
C
127 wiersze
3.2 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2014 Google, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include "common/bt_trace.h"
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#include "device/bdaddr.h"
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static inline bool ets_isxdigit(char c)
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{
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if ((c >= '0') && (c <= '9')) {
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return true;
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}
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if ((c >= 'a') && (c <= 'f')) {
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return true;
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}
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return ((c >= 'A') && (c <= 'F'));
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}
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bool bdaddr_is_empty(const bt_bdaddr_t *addr)
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{
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assert(addr != NULL);
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uint8_t zero[sizeof(bt_bdaddr_t)] = { 0 };
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return memcmp(addr, &zero, sizeof(bt_bdaddr_t)) == 0;
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}
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bool bdaddr_equals(const bt_bdaddr_t *first, const bt_bdaddr_t *second)
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{
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assert(first != NULL);
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assert(second != NULL);
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return memcmp(first, second, sizeof(bt_bdaddr_t)) == 0;
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}
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bt_bdaddr_t *bdaddr_copy(bt_bdaddr_t *dest, const bt_bdaddr_t *src)
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{
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assert(dest != NULL);
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assert(src != NULL);
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return (bt_bdaddr_t *)memcpy(dest, src, sizeof(bt_bdaddr_t));
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}
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const char *bdaddr_to_string(const bt_bdaddr_t *addr, char *string, size_t size)
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{
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assert(addr != NULL);
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assert(string != NULL);
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if (size < 18) {
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return NULL;
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}
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const uint8_t *ptr = addr->address;
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sprintf(string, "%02x:%02x:%02x:%02x:%02x:%02x",
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ptr[0], ptr[1], ptr[2],
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ptr[3], ptr[4], ptr[5]);
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return string;
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}
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bool string_is_bdaddr(const char *string)
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{
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assert(string != NULL);
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size_t len = strlen(string);
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if (len != 17) {
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return false;
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}
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for (size_t i = 0; i < len; ++i) {
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// Every 3rd char must be ':'.
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if (((i + 1) % 3) == 0 && string[i] != ':') {
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return false;
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}
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// All other chars must be a hex digit.
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if (((i + 1) % 3) != 0 && !ets_isxdigit(string[i])) {
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return false;
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}
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}
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return true;
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}
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bool string_to_bdaddr(const char *string, bt_bdaddr_t *addr)
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{
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assert(string != NULL);
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assert(addr != NULL);
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bt_bdaddr_t new_addr;
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uint8_t *ptr = new_addr.address;
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uint32_t ptr_32[6];
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bool ret = sscanf(string, "%02x:%02x:%02x:%02x:%02x:%02x",
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&ptr_32[0], &ptr_32[1], &ptr_32[2], &ptr_32[3], &ptr_32[4], &ptr_32[5]) == 6;
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if (ret) {
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for (uint8_t i = 0; i < 6; i++){
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ptr[i] = (uint8_t) ptr_32[i];
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}
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memcpy(addr, &new_addr, sizeof(bt_bdaddr_t));
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}
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return ret;
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}
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hash_index_t hash_function_bdaddr(const void *key)
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{
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hash_index_t hash = 5381;
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const char *bytes = (const char *)key;
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for (size_t i = 0; i < sizeof(bt_bdaddr_t); ++i) {
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hash = ((hash << 5) + hash) + bytes[i];
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}
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return hash;
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}
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