refactor(buffer): Move P2 to Utilities

Author: FlorianWendelborn

source/buffer/read-int.ts

@@ -1,11 +1,8 @@
 import { Bits } from '../types'
+import { p2 } from '../utilities'
 import not from '../bits/not'
 import read from './read'
 
-// 32-bit powers of two wouldn't be possible with <<
-const p2: Array<number> = []
-for (let i: number = 0; i < 32; i++) p2[i] = Math.pow(2, i)
-
 /**
  * Converts a section of a buffer to a signed integer.
  *

source/buffer/read-u-int.ts

@@ -1,10 +1,7 @@
 import { Bits } from '../types'
+import { p2 } from '../utilities'
 import read from './read'
 
-// 32-bit powers of two wouldn't be possible with <<
-const p2: Array<number> = []
-for (let i: number = 0; i < 32; i++) p2[i] = Math.pow(2, i)
-
 /**
  * Converts a section of a buffer to an unsigned integer.
  *

source/utilities.ts

@@ -0,0 +1,3 @@
+// 32-bit powers of two wouldn't be possible with <<
+export const p2: Array<number> = []
+for (let i: number = 0; i < 32; i++) p2[i] = Math.pow(2, i)