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util.h
1 /* mbed Microcontroller Library
2  * Copyright (c) 2018 ARM Limited
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef FEATURES_NFC_SOURCE_NFC_COMMON_UTIL_H_
18 #define FEATURES_NFC_SOURCE_NFC_COMMON_UTIL_H_
19 
20 #include "platform/Span.h"
21 
22 namespace mbed {
23 namespace nfc {
24 namespace ndef {
25 namespace common {
26 
27 /**
28  * @addtogroup nfc
29  * @{
30  */
31 
32 /**
33  * Convert a C-string into a Span<const uint8_t>.
34  *
35  * @note The NULL charactere is not present in the resulting object.
36  *
37  * @param cstr The cstr to convert into a Span.
38  *
39  * @return A Span that views cstr but doesn't include the NULL terminator
40  * character.
41  */
42 template<size_t N>
43 Span < const uint8_t, N - 1 > span_from_cstr(const char (&cstr)[N])
44 {
45  return Span < const uint8_t, N - 1 > ((const uint8_t *)cstr, N - 1);
46 }
47 
48 /**
49  * Convert a C-string into a Span<const uint8_t>.
50  *
51  * @note The NULL charactere is not present in the resulting object.
52  *
53  * @param cstr The cstr to convert into a Span.
54  *
55  * @return A Span that views cstr but doesn't include the NULL terminator
56  * character.
57  */
58 Span<const uint8_t> span_from_cstr(const char *cstr);
59 
60 /**
61  * @}
62  */
63 
64 } // namespace common
65 } // namespace ndef
66 } // namespace nfc
67 } // namespace mbed
68 
69 #endif /* FEATURES_NFC_SOURCE_NFC_COMMON_UTIL_H_ */
Nonowning view to a sequence of contiguous elements.
Definition: Span.h:213
Span< const uint8_t > span_from_cstr(const char *cstr)
Convert a C-string into a Span<const uint8_t>.
Definition: AnalogIn.h:28
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