Add b suffix so we can specify bytes in --bwlimit, --min-size etc

Fixes #449

fs/config.go

@@ -94,7 +94,7 @@ var (
 )
 
 func init() {
-	pflag.VarP(&bwLimit, "bwlimit", "", "Bandwidth limit in kBytes/s, or use suffix k|M|G")
+	pflag.VarP(&bwLimit, "bwlimit", "", "Bandwidth limit in kBytes/s, or use suffix b|k|M|G")
 }
 
 // Turn SizeSuffix into a string
@@ -104,6 +104,9 @@ func (x SizeSuffix) String() string {
 	switch {
 	case x == 0:
 		return "0"
+	case x < 1024:
+		scaled = float64(x)
+		suffix = "b"
 	case x < 1024*1024:
 		scaled = float64(x) / 1024
 		suffix = "k"
@@ -132,6 +135,8 @@ func (x *SizeSuffix) Set(s string) error {
 	case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.':
 		suffixLen = 0
 		multiplier = 1 << 10
+	case 'b', 'B':
+		multiplier = 1
 	case 'k', 'K':
 		multiplier = 1 << 10
 	case 'm', 'M':

fs/config_test.go

@@ -12,7 +12,7 @@ func TestSizeSuffixString(t *testing.T) {
 		want string
 	}{
 		{0, "0"},
-		{102, "0.100k"},
+		{102, "102b"},
 		{1024, "1k"},
 		{1024 * 1024, "1M"},
 		{1024 * 1024 * 1024, "1G"},
@@ -34,6 +34,8 @@ func TestSizeSuffixSet(t *testing.T) {
 		err  bool
 	}{
 		{"0", 0, false},
+		{"1b", 1, false},
+		{"102B", 102, false},
 		{"0.1k", 102, false},
 		{"0.1", 102, false},
 		{"1K", 1024, false},

fs/filter.go

@@ -35,8 +35,8 @@ var (
 )
 
 func init() {
-	pflag.VarP(&minSize, "min-size", "", "Don't transfer any file smaller than this in k or suffix k|M|G")
-	pflag.VarP(&maxSize, "max-size", "", "Don't transfer any file larger than this in k or suffix k|M|G")
+	pflag.VarP(&minSize, "min-size", "", "Don't transfer any file smaller than this in k or suffix b|k|M|G")
+	pflag.VarP(&maxSize, "max-size", "", "Don't transfer any file larger than this in k or suffix b|k|M|G")
 }
 
 // rule is one filter rule