A stream to read and write from in-memory data. More...
#include <streams.h>
Public Member Functions | |
| char const * | get_data () |
| Returns a pointer to the begin of the readable memory block. | |
| gate_size_t | size () |
| Returns the total size of readable bytes. | |
| gate_result_t | reserve (gate_size_t space) |
| Ensures that the given amount of space is preallocated at the end of the internal buffer. | |
| gate_result_t | fill (char fillitem, gate_size_t fillsize) |
| Adds a field of characters at the write-end of the internal buffer. | |
| gate_size_t | discard (gate_size_t bytestodiscard) |
| Removes the given amount of bytes from the read buffer at the beginning. | |
| gate_size_t | discard_back (gate_size_t bytestodiscard) |
| Removes the given amount of bytes at the end of the internal buffer (removes previously written bytes) | |
| gate_result_t | reset () |
| Clears the readable area from the stream, discards all bytes. | |
 Public Member Functions inherited from gate_stream_t | |
| gate_result_t | read (char *buffer, gate_size_t bufferlength, gate_size_t *returned) |
| Read bytes from stream and stores them in the given buffer. | |
| gate_result_t | peek (char *buffer, gate_size_t bufferlength, gate_size_t *returned) |
| Tries to read bytes from the stream, but leaves them in its input buffer to be read again. | |
| gate_result_t | write (char const *buffer, gate_size_t bufferlength, gate_size_t *written) |
| Writes bytes from the given buffer into the stream. | |
| gate_result_t | flush () |
| Instructs the stream to flush its internal buffers and make current status persistent. | |
| Public Member Functions inherited from gate_object_t | |
| char const * | get_interface_name () |
| Returns on object's interface path name. | |
| void | release () |
| Decrease object's reference counter, releases the object when count reaches zero. | |
| int | retain () |
| Increase object's reference counter. | |
Detailed Description
A stream to read and write from in-memory data.
gate_stream_t::write() appends data to the internal memory buffer at the end gate_stream_t::read() extracts data from the internal memory buffer from the beginning gate_memstream_t is a FIFO buffer. Data appended by write() are retrieved with read()
Member Function Documentation
◆ discard()
| gate_size_t discard | ( | gate_size_t | bytestodiscard | ) |
Removes the given amount of bytes from the read buffer at the beginning.
- Parameters
-
[in] bytestodiscard Amount of bytes to discard
- Returns
- real amount of bytes that were discarded
◆ discard_back()
| gate_size_t discard_back | ( | gate_size_t | bytestodiscard | ) |
Removes the given amount of bytes at the end of the internal buffer (removes previously written bytes)
- Parameters
-
[in] bytestodiscard Amount of bytes to discard
- Returns
- real amount of bytes that were discarded
◆ fill()
| gate_result_t fill | ( | char | fillitem, |
| gate_size_t | fillsize ) |
Adds a field of characters at the write-end of the internal buffer.
- Parameters
-
[in] fillitem Character to be used repeated to fill the buffer [in] fillsize Amount of characters to fill the write buffer at the end
- Returns
- GATE_RESULT_* result code
◆ get_data()
| char const * get_data | ( | ) |
Returns a pointer to the begin of the readable memory block.
- Returns
- Pointer to current data in internal buffer
◆ reserve()
| gate_result_t reserve | ( | gate_size_t | space | ) |
Ensures that the given amount of space is preallocated at the end of the internal buffer.
- Parameters
-
[in] space Amount of bytes to be reserved (preallocated) of writing
- Returns
- GATE_RESULT_* result code
◆ reset()
| gate_result_t reset | ( | ) |
Clears the readable area from the stream, discards all bytes.
- Returns
- GATE_RESULT_* result code
◆ size()
| gate_size_t size | ( | ) |
Returns the total size of readable bytes.
- Returns
- Amount of bytes currently in accessible read buffer
The documentation for this interface was generated from the following file:
- src/gate/streams.h
