52 lines
1.2 KiB
JavaScript
52 lines
1.2 KiB
JavaScript
"use strict";
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module.exports = BufferReader;
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// extends Reader
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var Reader = require("./reader");
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(BufferReader.prototype = Object.create(Reader.prototype)).constructor = BufferReader;
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var util = require("./util/minimal");
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/**
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* Constructs a new buffer reader instance.
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* @classdesc Wire format reader using node buffers.
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* @extends Reader
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* @constructor
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* @param {Buffer} buffer Buffer to read from
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*/
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function BufferReader(buffer) {
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Reader.call(this, buffer);
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/**
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* Read buffer.
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* @name BufferReader#buf
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* @type {Buffer}
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*/
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}
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BufferReader._configure = function () {
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/* istanbul ignore else */
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if (util.Buffer)
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BufferReader.prototype._slice = util.Buffer.prototype.slice;
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};
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/**
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* @override
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*/
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BufferReader.prototype.string = function read_string_buffer() {
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var len = this.uint32(); // modifies pos
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return this.buf.utf8Slice
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? this.buf.utf8Slice(this.pos, this.pos = Math.min(this.pos + len, this.len))
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: this.buf.toString("utf-8", this.pos, this.pos = Math.min(this.pos + len, this.len));
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};
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/**
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* Reads a sequence of bytes preceeded by its length as a varint.
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* @name BufferReader#bytes
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* @function
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* @returns {Buffer} Value read
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*/
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BufferReader._configure();
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