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-buffer
-======
-In whole project are used ring buffers. This is so common that handling them is
-exported to separated header file. In fact it contains two implementations of
-buffers. One implementation is defined using preprocessor macros. Another one is
-plain C code.
-
-## Preprocessor implementation
-Preprocessor implementation is expected to be faster and less memory intense. Also
-more suitable for buffers of simple types (such us int). But this buffer has to be
-defined with known size at compile time and can't be resized. All this makes it
-good implementation for IO devices input and output buffers, but less for more
-complicated tasks containing for example sorting.
-
-### Macros
-#### IOEBUFFER
-```C
-IOEBUFFER(type, name, size)
-```
-This macro defines buffer. Use it to define new buffer.
-##### Parameters
-| type | Specify type of elements in buffer. Can be any valid C type |
-| name | Name of buffer. This is C variable name.                    |
-| size | Numerical value of buffer size                              |
-
-#### IOEBUFFER_INIT
-```C
-IOEBUFFER_INIT(name, size)
-```
-Use this to initialize buffer. Parameter `size` must be same as for IOEBUFFER
-(definition of buffer). You can use this also to reset buffer (remove all data
-from buffer).
-##### Parameters
-| name | Name if buffer. This is C variable name. |
-| size | Numerical value of buffer size           |
-
-#### IOEBUFFER_PUT
-```C
-IOEBUFFER_PUT(name, size, data, mode)
-```
-Use this macro to add new data to buffer.
-##### Parameters
-| name | Name of buffer. This is C variable name. |
-| size | Numerical value of buffer size           |
-| data | Data to be stored to buffer              |
-| mode | This specifies action if buffer is full. |
-##### Modes
-| IOEBUFFER_MODE_BLOCK     | Block execution until buffer has some free space. |
-| IOEBUFFER_MODE_OVERWRITE | Overwrites oldest added (fist to be read)         |
-| IOEBUFFER_MODE_DROP      | New data won't be stored to buffer if full        |
-
-#### IOEBUFFER_GET
-```C
-IOEBUFFER_GET(name, size, variable)
-```
-Get value from buffer. Value is stored in `variable` (it is variable of same type
-as buffer data, not pointer to variable of same type). If no data is in buffer,
-variable is set to NULL.
-##### Parameters
-| name     | Name of buffer. This is C variable name.  |
-| size     | Numerical value of buffer size.           |
-| variable | Variable in which data will be stored in. |
-
-#### IOEBUFFER_CNT
-```C
-IOEBUFFER_CNT(name, size, variable)
-```
-Counts number of data entries in buffer and saves value to variable.
-##### Parameters
-| name     | Name of buffer. This is C variable name.                    |
-| size     | Numerical value of buffer size.                             |
-| variable | Int/Unsigned type variable where data count will be stored. |
-
-## C implementation
-C implementation is more general. Size is defined by calling initialization
-function. But it is using general pointers, so it is only able store pointers.
-
-As buffer identification is used defined type `IOEBuffer`. All functions takes
-pointer to this type as parameter. Because of this, it won't be described for
-every function.
-
-### Functions
-#### ioebuffer_init
-```C
-int8_t ioebuffer_init(IOEBuffer *buf, uint8_t size, uint8_t flags)
-```
-Initialized buffer and allocates required resources.
-##### Parameters
-| size  | Number of elements to be maximally stored in buffer |
-| flags | TODO
-##### Flags
-TODO
-
-#### ioebuffer_uninit
-```C
-void ioebuffer_uninit(IOEBuffer *buf)
-```
-Frees all resources allocated during initialization of buffer. Use this every time
-you are freeing buffer.
-
-#### ioebuffer_put
-```C
-int8_t ioebuffer_put(IOEBuffer *buf, void *data)
-```
-Add `data` to buffer