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util: reverse buffers instead of strings

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This commit is contained in:
Matthew Zipkin 2019-04-02 16:49:35 -07:00
parent 6a01409b79
commit 1b868b6a9d
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GPG Key ID: E7E2984B6289C93A
1 changed files with 3 additions and 15 deletions
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18
lib/utils/util.js
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@ -96,31 +96,19 @@ util.time = function time(date) {
/**
* Reverse a hex-string.
* @param {String} str - Hex string.
* @param {Buffer}
* @returns {String} Reversed hex string.
*/
util.revHex = function revHex(buf) {
assert(Buffer.isBuffer(buf));
const str = buf.toString('hex');
let out = '';
for (let i = str.length - 2; i >= 0; i -= 2)
out += str[i] + str[i + 1];
return out;
return Buffer.from(buf).reverse().toString('hex');
};
util.fromRev = function fromRev(str) {
assert(typeof str === 'string');
assert((str.length & 1) === 0);
let out = '';
for (let i = str.length - 2; i >= 0; i -= 2)
out += str[i] + str[i + 1];
return Buffer.from(out, 'hex');
return Buffer.from(str, 'hex').reverse();
};