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util.h
1 /* mbed Microcontroller Library
2  * Copyright (c) 2018 ARM Limited
3  * SPDX-License-Identifier: Apache-2.0
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #ifndef FEATURES_NFC_SOURCE_NFC_COMMON_UTIL_H_
19 #define FEATURES_NFC_SOURCE_NFC_COMMON_UTIL_H_
20 
21 #include "platform/Span.h"
22 
23 namespace mbed {
24 namespace nfc {
25 namespace ndef {
26 namespace common {
27 
28 /**
29  * @addtogroup nfc
30  * @{
31  */
32 
33 /**
34  * Convert a C-string into a Span<const uint8_t>.
35  *
36  * @note The NULL charactere is not present in the resulting object.
37  *
38  * @param cstr The cstr to convert into a Span.
39  *
40  * @return A Span that views cstr but doesn't include the NULL terminator
41  * character.
42  */
43 template<size_t N>
44 Span < const uint8_t, N - 1 > span_from_cstr(const char (&cstr)[N])
45 {
46  return Span < const uint8_t, N - 1 > ((const uint8_t *)cstr, N - 1);
47 }
48 
49 /**
50  * Convert a C-string into a Span<const uint8_t>.
51  *
52  * @note The NULL charactere is not present in the resulting object.
53  *
54  * @param cstr The cstr to convert into a Span.
55  *
56  * @return A Span that views cstr but doesn't include the NULL terminator
57  * character.
58  */
59 Span<const uint8_t> span_from_cstr(const char *cstr);
60 
61 /**
62  * @}
63  */
64 
65 } // namespace common
66 } // namespace ndef
67 } // namespace nfc
68 } // namespace mbed
69 
70 #endif /* FEATURES_NFC_SOURCE_NFC_COMMON_UTIL_H_ */
Nonowning view to a sequence of contiguous elements.
Definition: Span.h:215
Span< const uint8_t > span_from_cstr(const char *cstr)
Convert a C-string into a Span<const uint8_t>.
Definition: ATHandler.h:46
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