tape: WIP
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2138d47f07
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@ -6,6 +6,8 @@ package tape
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// TODO: add support for struct tags: `tape:"0000"`, tape:"0001"` so they can get
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// transformed into tables with a defined schema
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// TODO: test all of these smaller functions individually
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import "fmt"
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import "reflect"
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@ -346,10 +348,12 @@ func peekSlice(decoder *Decoder, tag Tag) (Tag, int, error) {
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for {
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elem, populated, n, err := peekSliceOnce(decoder, tag, offset)
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if err != nil { return 0, 0, err }
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offset += n
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offset = n
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dimension += 1
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if elem.Is(OTA) {
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if !populated {
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// default to a large byte array, will be
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// interpreted as a string.
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return LBA, dimension + 1, nil
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}
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} else {
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@ -371,7 +375,7 @@ func peekSliceOnce(decoder *Decoder, tag Tag, offset int) (elem Tag, populated b
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headerBytes, err := decoder.Peek(elemTagEnd)
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if err != nil { return 0, false, 0, err }
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elem = Tag(headerBytes[len(headerBytes)])
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elem = Tag(headerBytes[len(headerBytes) - 1])
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for index := lengthStart; index < lengthEnd; index += 1 {
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if headerBytes[index] > 0 {
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populated = true
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@ -67,6 +67,65 @@ func TestEncodeDecodeAnyMap(test *testing.T) {
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if err != nil { test.Fatal(err) }
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}
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func TestPeekSlice(test *testing.T) {
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buffer := bytes.NewBuffer([]byte {
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2, byte(OTA.WithCN(3)),
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0, 0, 0, 1, byte(LI.WithCN(1)),
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0, 0x5,
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2, byte(LI.WithCN(1)),
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0, 0x17,
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0xAA, 0xAA,
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})
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decoder := NewDecoder(buffer)
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elem, dimension, err := peekSlice(decoder, OTA.WithCN(0))
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if err != nil { test.Fatal(err) }
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if elem != LI.WithCN(1) {
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test.Fatalf("wrong element tag: %v %02X", elem, byte(elem))
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}
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if got, correct := dimension, 2; got != correct {
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test.Fatalf("wrong dimension: %d != %d", got, correct)
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}
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}
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func TestPeekSliceOnce(test *testing.T) {
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buffer := bytes.NewBuffer([]byte {
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2, byte(OTA.WithCN(3)),
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0, 0, 0, 1, byte(LI.WithCN(1)),
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0, 0x5,
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2, byte(LI.WithCN(1)),
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0, 0x17,
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0xAA, 0xAA,
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})
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decoder := NewDecoder(buffer)
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test.Log("--- stage 1")
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elem, populated, n, err := peekSliceOnce(decoder, OTA.WithCN(0), 0)
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if err != nil { test.Fatal(err) }
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if elem != OTA.WithCN(3) {
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test.Fatal("wrong element tag:", elem)
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}
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if !populated {
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test.Fatal("wrong populated:", populated)
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}
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if got, correct := n, 2; got != correct {
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test.Fatalf("wrong n: %d != %d", got, correct)
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}
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test.Log("--- stage 2")
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elem, populated, n, err = peekSliceOnce(decoder, elem, n)
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if err != nil { test.Fatal(err) }
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if elem != LI.WithCN(1) {
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test.Fatal("wrong element tag:", elem)
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}
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if !populated {
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test.Fatal("wrong populated:", populated)
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}
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if got, correct := n, 7; got != correct {
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test.Fatalf("wrong n: %d != %d", got, correct)
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}
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}
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func encAny(value any) ([]byte, Tag, int, error) {
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tag, err := TagAny(value)
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if err != nil { return nil, 0, 0, err }
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