Fix GSM7Bit packed splitting (#108)

Closes #100

.github/workflows/go.yml

@@ -18,12 +18,12 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.16
+          go-version: 1.18
 
       - name: Linter
         uses: golangci/golangci-lint-action@v3
         with:
-          version: v1.29
+          version: latest
 
       - name: Start SMSC
         run: |

data/codings.go

@@ -93,7 +93,11 @@ func (c *gsm7bit) Decode(data []byte) (string, error) {
 func (c *gsm7bit) DataCoding() byte { return GSM7BITCoding }
 
 func (c *gsm7bit) ShouldSplit(text string, octetLimit uint) (shouldSplit bool) {
-	return uint(len(text)) > octetLimit
+	if c.packed {
+		return uint((len(text)*7+7)/8) > octetLimit
+	} else {
+		return uint(len(text)) > octetLimit
+	}
 }
 
 func (c *gsm7bit) EncodeSplit(text string, octetLimit uint) (allSeg [][]byte, err error) {

data/codings_test.go

@@ -60,7 +60,7 @@ func TestGSM7Bit(t *testing.T) {
 }
 
 func TestSplit(t *testing.T) {
-	require.EqualValues(t, 00, GSM7BITPACKED.DataCoding())
+	require.EqualValues(t, 0o0, GSM7BITPACKED.DataCoding())
 
 	t.Run("testShouldSplitGSM7", func(t *testing.T) {
 		octetLim := uint(140)

go.mod

@@ -1,8 +1,14 @@
 module github.com/linxGnu/gosmpp
 
-go 1.16
+go 1.18
 
 require (
-	github.com/stretchr/testify v1.8.2
-	golang.org/x/text v0.9.0
+	github.com/stretchr/testify v1.8.4
+	golang.org/x/text v0.12.0
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,49 +1,12 @@
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
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-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
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-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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