Object MemoryStream

Memory stream object

The MemoryStream object creates a memory-based stream object, the creation method:

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var ms = new io.MemoryStream();

Inheritance

Constructor

MemoryStream

MemoryStream constructor

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new MemoryStream();

Member attributes

fd

Integer, query Stream The corresponding file descriptor value, implemented by the subclass

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readonly Integer MemoryStream.fd;

Member function

setTime

Force the last update time of the memory stream object

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MemoryStream.setTime(Date d);

Call parameters:

• d: Date, specify the time to be set

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clone

Create a read-only copy of the current memory stream

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MemoryStream MemoryStream.clone();

Return result:

• MemoryStream, Return a read-only memory stream object

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clear

Clear memory file data, reset pointer

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MemoryStream.clear();

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seek

Move the current operating position of the file

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2
MemoryStream.seek(Long offset,
    Integer whence = fs.SEEK_SET);

Call parameters:

• offset: Long, specify a new location
• whence: Integer, specify the position reference, the allowed values ​​are: SEEK_SET, SEEK_CUR, SEEK_END

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tell

Query the current position of the stream

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Long MemoryStream.tell();

Return result:

• Long, Returns the current position of the stream

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rewind

Move the current position to the beginning of the stream

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MemoryStream.rewind();

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size

Query stream size

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Long MemoryStream.size();

Return result:

• Long, Return stream size

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readAll

Read all remaining data from the stream

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Buffer MemoryStream.readAll() async;

Return result:

• Buffer, Return the data read from the stream, if there is no data to read, or the connection is interrupted, then return null

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truncate

Modify the file size, if the new size is smaller than the original size, the file is truncated

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MemoryStream.truncate(Long bytes) async;

Call parameters:

• bytes: Long, new file size

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eof

Check if the file is to the end

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Boolean MemoryStream.eof();

Return result:

• Boolean, Return True to indicate the end

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stat

Query the basic information of the current file

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Stat MemoryStream.stat() async;

Return result:

• Stat, return Stat Object description file information

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read

Read data of the specified size from the stream

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Buffer MemoryStream.read(Integer bytes = -1) async;

Call parameters:

• bytes: Integer, specify the amount of data to be read, the default is to read a random size data block, the size of the data read depends on the device

Return result:

• Buffer, Return the data read from the stream, if there is no data to read, or the connection is interrupted, then return null

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write

Write the given data to the stream

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MemoryStream.write(Buffer data) async;

Call parameters:

• data: Buffer, Given the data to be written

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flush

Write the contents of the file buffer to the physical device

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MemoryStream.flush() async;

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close

Close the current stream object

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MemoryStream.close() async;

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copyTo

Copy the stream data to the target stream

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2
Long MemoryStream.copyTo(Stream stm,
    Long bytes = -1) async;

Call parameters:

• stm: Stream, The target stream object
• bytes: Long, the number of bytes copied

Return result:

• Long, Returns the number of bytes copied

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toString

Returns the string representation of the object, generally returns "[Native Object]", the object can be re-implemented according to its own characteristics

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String MemoryStream.toString();

Return result:

• String, Returns the string representation of the object

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toJSON

Returns the JSON format representation of the object, generally returns a collection of readable attributes defined by the object

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Value MemoryStream.toJSON(String key = "");

Call parameters:

• key: String, unused

Return result:

• Value, Returns a value containing JSON serializable