8 lines
242 B
JavaScript
8 lines
242 B
JavaScript
|
var equal = require('buffer-equal')
|
||
|
|
var HEADER = new Buffer([66, 77, 70, 3])
|
||
|
|
|
||
|
|
module.exports = function(buf) {
|
||
|
|
if (typeof buf === 'string')
|
||
|
|
return buf.substring(0, 3) === 'BMF'
|
||
|
|
return buf.length > 4 && equal(buf.slice(0, 4), HEADER)
|
||
|
|
}
|