ChibiOS/HAL  7.0.3
memstreams.h
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1 /*
2  ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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 /**
18  * @file memstreams.h
19  * @brief Memory streams structures and macros.
20 
21  * @addtogroup HAL_MEMORY_STREAMS
22  * @{
23  */
24 
25 #ifndef MEMSTREAMS_H
26 #define MEMSTREAMS_H
27 
28 /*===========================================================================*/
29 /* Driver constants. */
30 /*===========================================================================*/
31 
32 /*===========================================================================*/
33 /* Driver pre-compile time settings. */
34 /*===========================================================================*/
35 
36 /*===========================================================================*/
37 /* Derived constants and error checks. */
38 /*===========================================================================*/
39 
40 /*===========================================================================*/
41 /* Driver data structures and types. */
42 /*===========================================================================*/
43 
44 /**
45  * @brief @p MemStream specific data.
46  */
47 #define _memory_stream_data \
48  _base_sequential_stream_data \
49  /* Pointer to the stream buffer.*/ \
50  uint8_t *buffer; \
51  /* Size of the stream.*/ \
52  size_t size; \
53  /* Current end of stream.*/ \
54  size_t eos; \
55  /* Current read offset.*/ \
56  size_t offset;
57 
58 /**
59  * @brief @p MemStream virtual methods table.
60  */
61 struct MemStreamVMT {
62  _base_sequential_stream_methods
63 };
64 
65 /**
66  * @extends BaseSequentialStream
67  *
68  * @brief Memory stream object.
69  */
70 typedef struct {
71  /** @brief Virtual Methods Table.*/
72  const struct MemStreamVMT *vmt;
73  _memory_stream_data
74 } MemoryStream;
75 
76 /*===========================================================================*/
77 /* Driver macros. */
78 /*===========================================================================*/
79 
80 /*===========================================================================*/
81 /* External declarations. */
82 /*===========================================================================*/
83 
84 #ifdef __cplusplus
85 extern "C" {
86 #endif
87  void msObjectInit(MemoryStream *msp, uint8_t *buffer,
88  size_t size, size_t eos);
89 #ifdef __cplusplus
90 }
91 #endif
92 
93 #endif /* MEMSTREAMS_H */
94 
95 /** @} */
_base_sequential_stream_methods
#define _base_sequential_stream_methods
BaseSequentialStream specific methods.
Definition: hal_streams.h:50
msObjectInit
void msObjectInit(MemoryStream *msp, uint8_t *buffer, size_t size, size_t eos)
Memory stream object initialization.
Definition: memstreams.c:104
MemoryStream::vmt
const struct MemStreamVMT * vmt
Virtual Methods Table.
Definition: memstreams.h:72
MemoryStream
Memory stream object.
Definition: memstreams.h:70
MemStreamVMT
MemStream virtual methods table.
Definition: memstreams.h:61
_memory_stream_data
#define _memory_stream_data
MemStream specific data.
Definition: memstreams.h:47