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49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
/*
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* Copyright (C) 2015 Martine Lenders <mlenders@inf.fu-berlin.de>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @{
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*
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* @file
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*/
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#include "net/gnrc/netif.h"
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static inline char _half_byte_to_char(uint8_t half_byte)
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{
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return (half_byte < 10) ? ('0' + half_byte) : ('a' + (half_byte - 10));
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}
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char *gnrc_netif_addr_to_str(char *out, size_t out_len, const uint8_t *addr,
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size_t addr_len)
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{
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size_t i;
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if (out_len < (3 * addr_len)) { /* 2 for every byte, 1 for ':' or '\0' */
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return NULL;
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}
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out[0] = '\0';
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for (i = 0; i < addr_len; i++) {
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out[(3 * i)] = _half_byte_to_char(addr[i] >> 4);
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out[(3 * i) + 1] = _half_byte_to_char(addr[i] & 0xf);
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if (i != (addr_len - 1)) {
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out[(3 * i) + 2] = ':';
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}
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else {
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out[(3 * i) + 2] = '\0';
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}
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}
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return out;
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}
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/** @} */
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