Memory stream operating on fixed-size buffer Once the limit is reached the stream will discard incoming bytes on write. More...
#include <LimitedMemoryStream.h>
Public Member Functions | |
LimitedMemoryStream (void *buffer, size_t length, size_t available, bool owned) | |
Constructor for use with pre-existing buffer. More... | |
LimitedMemoryStream (size_t length) | |
Constructor to set size of internal buffer. More... | |
~LimitedMemoryStream () | |
StreamType | getStreamType () const override |
Get the stream type. More... | |
char * | getStreamPointer () const |
Get a pointer to the current position. More... | |
int | available () override |
Return the total length of the stream. More... | |
size_t | getCapacity () const |
uint16_t | readMemoryBlock (char *data, int bufSize) override |
Read a block of memory. More... | |
int | seekFrom (int offset, SeekOrigin origin) override |
Change position in stream. More... | |
size_t | write (const uint8_t *buffer, size_t size) override |
Write chars to stream. More... | |
bool | isFinished () override |
Check if all data has been read. More... | |
bool | moveString (String &s) override |
Memory-based streams may be able to move content into a String. More... | |
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size_t | write (uint8_t charToWrite) override |
From Stream class: We don't write using this stream. More... | |
virtual size_t | copyFrom (IDataSourceStream *source, size_t size=SIZE_MAX) |
Copy data from a source stream. More... | |
virtual size_t | write (uint8_t c)=0 |
Writes a single character to output stream. More... | |
size_t | write (const char *str) |
Writes a c-string to output stream. More... | |
virtual size_t | write (const uint8_t *buffer, size_t size) |
Writes characters from a buffer to output stream. More... | |
size_t | write (const char *buffer, size_t size) |
Writes characters from a buffer to output stream. More... | |
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virtual bool | isValid () const |
Determine if the stream object contains valid data. More... | |
size_t | readBytes (char *buffer, size_t length) override |
Read chars from stream into buffer. More... | |
int | read () override |
Read one character and moves the stream pointer. More... | |
int | peek () override |
Read a character without advancing the stream pointer. More... | |
virtual bool | seek (int len) |
Move read cursor. More... | |
void | flush () override |
virtual String | id () const |
Returns unique id of the resource. More... | |
virtual String | getName () const |
Returns name of the resource. More... | |
virtual MimeType | getMimeType () const |
Get MIME type for stream content. More... | |
String | readString (size_t maxLen) override |
Overrides Stream method for more efficient reading. More... | |
virtual size_t | readBytes (char *buffer, size_t length) |
Read chars from stream into buffer. More... | |
size_t | readBytes (uint8_t *buffer, size_t length) |
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Stream () | |
void | setTimeout (unsigned long timeout) |
Set maximum milliseconds to wait for stream data, default is 1 second. More... | |
bool | find (const char *target) |
Read data from the stream until the target string is found. More... | |
bool | find (const char *target, size_t length) |
Read data from the stream until the target string of given length is found. More... | |
bool | findUntil (const char *target, const char *terminator) |
As find() but search ends if the terminator string is found. More... | |
bool | findUntil (const char *target, size_t targetLen, const char *terminate, size_t termLen) |
As findUntil(const char*, const char*) but search ends if the terminate string is found. More... | |
long | parseInt () |
Returns the first valid (long) integer value from the current position. More... | |
float | parseFloat () |
float version of parseInt More... | |
size_t | readBytes (uint8_t *buffer, size_t length) |
size_t | readBytesUntil (char terminator, char *buffer, size_t length) |
As readBytes() with terminator character. More... | |
String | readStringUntil (char terminator) |
virtual int | indexOf (char c) |
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virtual | ~Print () |
int | getWriteError () |
Gets last error. More... | |
void | clearWriteError () |
Clears the last write error. More... | |
size_t | write (const char *str) |
Writes a c-string to output stream. More... | |
size_t | write (const char *buffer, size_t size) |
Writes characters from a buffer to output stream. More... | |
size_t | print (char c) |
Prints a single character to output stream. More... | |
size_t | print (const char str[]) |
Prints a c-string to output stream. More... | |
size_t | print (double num, int digits=2) |
Print a floating-point number to output stream. More... | |
template<typename T > | |
std::enable_if< has_printTo< T >::value, size_t >::type | print (const T &obj) |
Prints a Printable object to output stream. More... | |
size_t | print (const String &s) |
Prints a String to output stream. More... | |
template<typename E > | |
std::enable_if< std::is_enum< E >::value &&!std::is_convertible< E, int >::value, size_t >::type | print (E value) |
enums can be printed as strings provided they have a toString(E) implementation. More... | |
size_t | println () |
Prints a newline to output stream. More... | |
template<typename... Args> | |
size_t | println (const Args &... args) |
Print value plus newline to output stream. More... | |
size_t | printf (const char *fmt,...) |
Prints a formatted c-string to output stream. More... | |
size_t | print (unsigned long num, uint8_t base=DEC) |
template<typename... Args> | |
size_t | print (unsigned long num, Args... args) |
template<typename... Args> | |
size_t | print (const unsigned long long &num, Args... args) |
size_t | print (long num, uint8_t base=DEC) |
template<typename... Args> | |
size_t | print (long num, Args... args) |
template<typename... Args> | |
size_t | print (const long long &num, Args... args) |
template<typename... Args> | |
size_t | print (unsigned int num, Args... args) |
template<typename... Args> | |
size_t | print (unsigned char num, Args... args) |
template<typename... Args> | |
size_t | print (int num, Args... args) |
Additional Inherited Members | |
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int | timedRead () |
int | timedPeek () |
int | peekNextDigit () |
returns the next numeric digit in the stream or -1 if timeout More... | |
long | parseInt (char skipChar) |
Like regular parseInt() but the given skipChar is ignored. More... | |
float | parseFloat (char skipChar) |
Like parseInt(skipChar) for float. More... | |
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void | setWriteError (int err=1) |
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uint16_t | receiveTimeout = 1000 |
number of milliseconds to wait for the next char before aborting timed read More... | |
Detailed Description
Memory stream operating on fixed-size buffer Once the limit is reached the stream will discard incoming bytes on write.
Constructor & Destructor Documentation
◆ LimitedMemoryStream() [1/2]
|
inline |
Constructor for use with pre-existing buffer.
- Parameters
-
buffer length Size of buffer available How much valid data already present in buffer owned If true, buffer will be freed when this stream is destroyed
◆ LimitedMemoryStream() [2/2]
|
inline |
Constructor to set size of internal buffer.
- Parameters
-
length Size of buffer
- Note
- The actual memory for the buffer will be allocated at the first write operation.
◆ ~LimitedMemoryStream()
|
inline |
Member Function Documentation
◆ available()
|
inlineoverridevirtual |
Return the total length of the stream.
- Return values
-
int -1 is returned when the size cannot be determined
Reimplemented from IDataSourceStream.
◆ getCapacity()
|
inline |
◆ getStreamPointer()
|
inline |
Get a pointer to the current position.
- Return values
-
const char* Pointer to current cursor position within the data stream
◆ getStreamType()
|
inlineoverridevirtual |
◆ isFinished()
|
inlineoverridevirtual |
◆ moveString()
Memory-based streams may be able to move content into a String.
- Parameters
-
s String object to move data into
- Return values
-
bool true on success, false if there's a problem.
If the operation is not supported by the stream, s
will be invalidated and false returned.
Because a String object must have a NUL terminator, this will be appended if there is sufficient capacity. In this case, the method returns true.
If there is no capacity to add a NUL terminator, then the final character of stream data will be replaced with a NUL. The method returns false to indicate this.
Reimplemented from IDataSourceStream.
◆ readMemoryBlock()
Read a block of memory.
- Parameters
-
data Pointer to the data to be read bufSize Quantity of chars to read
- Return values
-
uint16_t Quantity of chars read
- Todo:
- Should IDataSourceStream::readMemoryBlock return same data type as its bufSize param?
Implements IDataSourceStream.
◆ seekFrom()
|
overridevirtual |
Change position in stream.
- Parameters
-
offset origin
- Return values
-
New position, < 0 on error
- Note
- This method is implemented by streams which support random seeking, such as files and memory streams.
Reimplemented from IDataSourceStream.
◆ write()
Write chars to stream.
- Parameters
-
buffer Pointer to buffer to write to the stream size Quantity of chars to write
- Return values
-
size_t Quantity of chars written to stream
- Note
- Although this is defined in the Print class, ReadWriteStream uses this as the core output method so descendants are required to implement it
Implements ReadWriteStream.
The documentation for this class was generated from the following file: