esp-idf/components/bt/esp_ble_mesh/mesh_common/mesh_util.c

45 lines
898 B
C

/*
* Copyright (c) 2017 Nordic Semiconductor ASA
* Copyright (c) 2016 Vinayak Kariappa Chettimada
* Copyright (c) 2015-2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include "mesh_types.h"
#include "mesh_util.h"
const char *bt_hex(const void *buf, size_t len)
{
static const char hex[] = "0123456789abcdef";
static char hexbufs[2][129];
static uint8_t curbuf;
const uint8_t *b = buf;
char *str = NULL;
int i;
str = hexbufs[curbuf++];
curbuf %= ARRAY_SIZE(hexbufs);
len = MIN(len, (sizeof(hexbufs[0]) - 1) / 2);
for (i = 0; i < len; i++) {
str[i * 2] = hex[b[i] >> 4];
str[i * 2 + 1] = hex[b[i] & 0xf];
}
str[i * 2] = '\0';
return str;
}
void mem_rcopy(uint8_t *dst, uint8_t const *src, uint16_t len)
{
src += len;
while (len--) {
*dst++ = *--src;
}
}