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buffer-reader-grabled

v0.1.1

Published

a reader for nodejs buffer(fix chinese garbled)

Downloads

4

Readme

Node Buffer Reader

Make reading data from a binary buffer easily.

Build Status

Install

npm install buffer-reader-grabled

Usage

var BufferReader = require('buffer-reader');
var reader = new BufferReader(buffer);

// Read next N bytes as string
var str = reader.nextString(10);

// Read next N bytes as buffer
var buf = reader.nextBuffer(10);

// Read next 2 bytes as Int16LE
var i = reader.nextInt16LE();


// Read next 8 bytes as DoubleLE
var d = reader.nextDoubleLE();

// Get all rest bytes as buffer
var rest = reader.restAll();

// OutOfBound will raise exception
try {
    reader.nextString(1);
}cache(e) {
    //  handle exception
}

// Append buffer to reader
reader.append(newbuffer);

// Read again
reader.nextString(1);

APIs

new BufferReader([buffer])

Create a new reader, if no buffer provided, a empty buffer will be used.

append(buffer)

Append new buffer to the end of current reader

tell()

Return current position of the reader

seek(pos)

Set new position of the reader, if the pos is invalid, an exception will be raised

move(offset)

Move the position of reader by offset, offset can be negative; it can be used to skip some bytes

restAll()

Get all the remaining bytes as a Buffer

nextBuffer(length)

Read a buffer with specified length

nextString(length, [encoding])

Read next length of bytes as String, encoding default is 'utf8'

next(Int8|UInt8)[(Int16|UInt16|Int32|UInt32|Float|Double)(LE|BE)]()

Read next bytes as given types, the value is just as the same format Buffer in nodejs doc.

License

(The BSD License)

Copyright (c) 2013, Villa.Gao [email protected]; All rights reserved.