refactor utility function name

src/commonMain/kotlin/com/infendro/encoding/StreamEncoding.kt

@@ -2,7 +2,7 @@ package com.infendro.encoding
 
 import com.infendro.encoding.exception.IllegalByteException
 import com.infendro.encoding.util.align
-import com.infendro.encoding.util.divCeil
+import com.infendro.encoding.util.ceilDiv
 import com.infendro.encoding.util.lcm
 import com.infendro.encoding.util.log2
 
@@ -17,8 +17,8 @@ class StreamEncoding internal constructor(
 
     override fun encode(bytes: ByteArray): ByteArray {
         val size = when (padding) {
-            null -> (bytes.size * 8).divCeil(bits)
-            else -> (bytes.size * 8).divCeil(bits).align(block)
+            null -> (bytes.size * 8).ceilDiv(bits)
+            else -> (bytes.size * 8).ceilDiv(bits).align(block)
         }
         val encoded = ByteArray(size)
         var i = 0

src/commonMain/kotlin/com/infendro/encoding/util/BigInt.kt

@@ -62,7 +62,7 @@ internal class BigInt private constructor(
             get() = BigInt(intArrayOf(0))
 
         fun from(bytes: ByteArray): BigInt {
-            val words = IntArray(bytes.size.divCeil(4))
+            val words = IntArray(bytes.size.ceilDiv(4))
             for (i in bytes.indices) {
                 val (wi, bi) = (bytes.lastIndex - i).divRem(4)
                 words[wi] = words[wi] or ((bytes[i].toInt() and 0xFF) shl (bi * 8))

src/commonMain/kotlin/com/infendro/encoding/util/Math.kt

@@ -2,11 +2,11 @@ package com.infendro.encoding.util
 
 import kotlin.math.log2
 
-internal fun Int.divCeil(n: Int): Int =
+internal fun Int.ceilDiv(n: Int): Int =
     (this + n - 1) / n
 
 internal fun Int.align(n: Int): Int =
-    divCeil(n) * n
+    ceilDiv(n) * n
 
 internal fun log2(value: Int): Double =
     log2(value.toDouble())