Commit 7ffc2533d01f9b747d1e93544fa339e5573f9b12
Introduce U256 class
Alex Beregszaszi committed on 8/13/2016, 1:46:37 AMParent: a514f42929dd5562af01038f0e55d3674936da43
Files changed
| u256.js | added |
| u256.js | ||
|---|---|---|
| @@ -1,0 +1,39 @@ | ||
| 1 | +const BN = require('bn.js') | |
| 2 | +const ethUtils = require('ethereumjs-util') | |
| 3 | + | |
| 4 | +module.exports = class U256 { | |
| 5 | + constructor (value) { | |
| 6 | + if ((typeof value === 'string') && ethUtils.isHexPrefixed(value)) { | |
| 7 | + this._value = new BN(value, 16) | |
| 8 | + } else { | |
| 9 | + this._value = new BN(value, 10) | |
| 10 | + } | |
| 11 | + } | |
| 12 | + | |
| 13 | + toString (radix = 10) { | |
| 14 | + if (radix === 16) { | |
| 15 | + return '0x' + this._value.toString(16) | |
| 16 | + } | |
| 17 | + return this._value.toString(radix) | |
| 18 | + } | |
| 19 | + | |
| 20 | + toBuffer () { | |
| 21 | + return this._value.toBuffer('be', 32) | |
| 22 | + } | |
| 23 | + | |
| 24 | + subi (u256) { | |
| 25 | + this._value.subi(u256._value) | |
| 26 | + } | |
| 27 | + | |
| 28 | + addi (u256) { | |
| 29 | + this._value.addi(u256._value) | |
| 30 | + } | |
| 31 | + | |
| 32 | + lt (u256) { | |
| 33 | + return this._value.lt(u256._value) | |
| 34 | + } | |
| 35 | + | |
| 36 | + gt (u256) { | |
| 37 | + return this._value.gt(u256._value) | |
| 38 | + } | |
| 39 | +} | |
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