f6a8878aa2
...will be useful in transactions. Note that we already have a primitive understanding of Varints in the BufferReader and BufferWriter classes. However, the new Varint class is a varint object which actually depends on BufferReader and BufferWriter for reading and writing varints. This class is for keeping track of the raw buffer that is read in from a buffer.
48 lines
1001 B
JavaScript
48 lines
1001 B
JavaScript
var BufferWriter = require('./bufferwriter');
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var BufferReader = require('./bufferreader');
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var BN = require('./bn');
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var Varint = function Varint(buf) {
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if (!(this instanceof Varint))
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return new Varint(buf);
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if (Buffer.isBuffer(buf)) {
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this.buf = buf;
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} else if (typeof buf === 'number') {
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var num = buf;
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this.fromNumber(num);
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} else if (buf) {
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var obj = buf;
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this.set(obj);
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}
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};
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Varint.prototype.set = function(obj) {
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this.buf = obj.buf || this.buf;
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return this;
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};
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Varint.prototype.fromBuffer = function(buf) {
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this.buf = buf;
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return this;
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};
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Varint.prototype.fromBufferReader = function(br) {
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this.buf = br.readVarintBuf();
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return this;
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};
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Varint.prototype.fromNumber = function(num) {
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this.buf = BufferWriter().writeVarintNum(num).concat();
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return this;
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};
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Varint.prototype.toBuffer = function() {
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return this.buf;
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};
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Varint.prototype.toNumber = function() {
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return BufferReader(this.buf).readVarintNum();
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};
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module.exports = Varint;
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