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Add symbol to input check mapping

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lash 2023-04-01 23:56:02 +01:00
parent 5b12385645
commit a90f41bfe4
Signed by untrusted user who does not match committer: lash
GPG Key ID: 21D2E7BB88C2A746
6 changed files with 14 additions and 9 deletions
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1
README.md
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@ -17,6 +17,7 @@ The VM defines the following opcode symbols:
* `MAP <symbol>` - Expose a code symbol previously loaded by `LOAD` to the rendering client. Roughly corresponds to the `global` directive in Python.
* `MOVE <symbol>` - Create a new execution frame, invalidating all previous `MAP` calls. More detailed: After a `MOVE` call, a `BACK` call will return to the same execution frame, with the same symbols available, but all `MAP` calls will have to be repeated.
* `HALT` - Stop execution. The remaining bytecode (typically, the routing code for the node) is returned to the invoking function.
* `INCMP <arg> <symbol>` - Compare registered input to `arg` and and move to `symbol` node on match. Any consecutive matches will be ignored until `HALT` is called.
### External code

2
go/engine/engine_test.go
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@ -85,7 +85,7 @@ func TestEngineInit(t *testing.T) {
if !bytes.Equal(b, []byte("hello world")) {
t.Fatalf("expected result 'hello world', got %v", b)
}
input := []byte("bar")
input := []byte("ooo")
err = en.Exec(input, ctx)
if err != nil {
t.Fatal(err)

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go/testdata/bar.bin vendored
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go/testdata/root.bin vendored
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8
go/vm/vm.go
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@ -169,12 +169,16 @@ func RunIncmp(instruction []byte, st *state.State, rs resource.Resource, ctx con
if err != nil {
return instruction, err
}
sym, tail, err := instructionSplit(tail)
if err != nil {
return instruction, err
}
v, err := st.GetFlag(state.FLAG_INMATCH)
if err != nil {
return tail, err
}
if v {
return tail, nil
return tail, nil
}
input, err := st.GetInput()
if err != nil {
@ -184,7 +188,7 @@ func RunIncmp(instruction []byte, st *state.State, rs resource.Resource, ctx con
if head == string(input) {
log.Printf("input match for '%s'", input)
_, err = st.SetFlag(state.FLAG_INMATCH)
st.Down(head)
st.Down(sym)
}
return tail, err
}

12
go/vm/vm_test.go
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@ -232,10 +232,10 @@ func TestRunArg(t *testing.T) {
st := state.NewState(5)
rs := TestResource{}
input := []byte("baz")
input := []byte("bar")
_ = st.SetInput(input)
bi := NewLine([]byte{}, INCMP, []string{"baz"}, nil, nil)
bi := NewLine([]byte{}, INCMP, []string{"bar", "baz"}, nil, nil)
b, err := Run(bi, &st, &rs, context.TODO())
if err != nil {
t.Error(err)
@ -254,10 +254,10 @@ func TestRunInputHandler(t *testing.T) {
st := state.NewState(5)
rs := TestResource{}
_ = st.SetInput([]byte("foo"))
_ = st.SetInput([]byte("baz"))
bi := NewLine([]byte{}, INCMP, []string{"bar"}, nil, nil)
bi = NewLine(bi, INCMP, []string{"foo"}, nil, nil)
bi := NewLine([]byte{}, INCMP, []string{"bar", "aiee"}, nil, nil)
bi = NewLine(bi, INCMP, []string{"baz", "foo"}, nil, nil)
bi = NewLine(bi, LOAD, []string{"one"}, nil, []uint8{0})
bi = NewLine(bi, LOAD, []string{"two"}, nil, []uint8{3})
bi = NewLine(bi, MAP, []string{"one"}, nil, nil)
@ -282,7 +282,7 @@ func TestRunArgInvalid(t *testing.T) {
var err error
b := NewLine([]byte{}, INCMP, []string{"bar"}, nil, nil)
b := NewLine([]byte{}, INCMP, []string{"bar", "baz"}, nil, nil)
b = NewLine(b, CATCH, []string{"_catch"}, []byte{state.FLAG_INMATCH}, []uint8{1})
b, err = Run(b, &st, &rs, context.TODO())