Reuse math.

Author: ncruces

vfs/xts/math.go renamed to internal/util/math.go

@@ -1,4 +1,4 @@
-package xts
+package util
 
 func abs(n int) int {
 	if n < 0 {
@@ -7,16 +7,16 @@ func abs(n int) int {
 	return n
 }
 
-func gcd(m, n int) int {
+func GCD(m, n int) int {
 	for n != 0 {
 		m, n = n, m%n
 	}
 	return abs(m)
 }
 
-func lcm(m, n int) int {
+func LCM(m, n int) int {
 	if n == 0 {
 		return 0
 	}
-	return abs(n) * (abs(m) / gcd(m, n))
+	return abs(n) * (abs(m) / GCD(m, n))
 }

vfs/xts/math_test.go renamed to internal/util/math_test.go

@@ -1,4 +1,4 @@
-package xts
+package util
 
 import (
 	"math"
@@ -46,7 +46,7 @@ func Test_gcd(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run("", func(t *testing.T) {
-			if got := gcd(tt.arg1, tt.arg2); got != tt.want {
+			if got := GCD(tt.arg1, tt.arg2); got != tt.want {
 				t.Errorf("gcd(%d, %d) = %d, want %d", tt.arg1, tt.arg2, got, tt.want)
 			}
 		})
@@ -74,7 +74,7 @@ func Test_lcm(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run("", func(t *testing.T) {
-			if got := lcm(tt.arg1, tt.arg2); got != tt.want {
+			if got := LCM(tt.arg1, tt.arg2); got != tt.want {
 				t.Errorf("lcm(%d, %d) = %d, want %d", tt.arg1, tt.arg2, got, tt.want)
 			}
 		})

vfs/adiantum/hbsh.go

@@ -187,7 +187,7 @@ func (h *hbshFile) Truncate(size int64) error {
 }
 
 func (h *hbshFile) SectorSize() int {
-	return lcm(h.File.SectorSize(), blockSize)
+	return util.LCM(h.File.SectorSize(), blockSize)
 }
 
 func (h *hbshFile) DeviceCharacteristics() vfs.DeviceCharacteristic {

vfs/adiantum/math.go

@@ -183,7 +183,7 @@ func (x *xtsFile) Truncate(size int64) error {
 }
 
 func (x *xtsFile) SectorSize() int {
-	return lcm(x.File.SectorSize(), sectorSize)
+	return util.LCM(x.File.SectorSize(), sectorSize)
 }
 
 func (x *xtsFile) DeviceCharacteristics() vfs.DeviceCharacteristic {