//FieldNamesToNumbers rewrites field names contained in the grammar to their respective field numbers found in the protocol buffer filedescriptorset.
//This allows for more speedy field comparisons in validation when used in conjunction with the ProtoNumParser.
func FieldNamesToNumbers(pkgName, msgName string, desc *descriptor.FileDescriptorSet, grammar *ast.Grammar) (*ast.Grammar, error) {
g := grammar.Clone()
descMap, err := proto.NewDescriptorMap(pkgName, msgName, desc)
if err != nil {
return nil, err
}
root := descMap.GetRoot()
refs := ast.NewRefLookup(g)
nameToNumber := &nameToNumber{
refs: make(map[string]*context),
descMap: descMap,
}
nameToNumber.refs["main"] = &context{root, false}
newRefs := make(map[string]*ast.Pattern)
oldContexts := 0
newContexts := 1
for oldContexts != newContexts {
oldContexts = newContexts
for name, context := range nameToNumber.refs {
newp, err := nameToNumber.translate(context, refs[name])
if err != nil {
return nil, err
}
newRefs[name] = newp
}
newContexts = len(nameToNumber.refs)
}
return ast.NewGrammar(newRefs), nil
}
func test(t *testing.T, name string, g *ast.Grammar, p parser.Interface, expected bool, desc string, record bool) {
if interp.HasRecursion(g) {
t.Skipf("convert was not designed to handle recursion")
}
if strings.HasPrefix(name, "GoBigOr") {
t.Skipf("too big to fail: the number of Ors creates a state space explosion")
}
var a *auto.Auto
var err error
if record {
a, err = auto.CompileRecord(g)
} else {
a, err = auto.Compile(g)
}
if err != nil {
t.Fatal(err)
}
match, err := a.Validate(p)
if err != nil {
t.Fatal(err)
}
if match != expected {
t.Fatalf("Expected %v on given \n%s\n on \n%s", expected, g.String(), desc)
}
}
func test(t *testing.T, g *ast.Grammar, p parser.Interface, expected bool, desc string) {
if interp.HasRecursion(g) {
t.Skipf("interp was not designed to handle left recursion")
}
p = debug.NewLogger(p, debug.NewLineLogger())
match, err := interp.Interpret(g, p)
if err != nil {
t.Fatal(err)
}
if match != expected {
t.Fatalf("Expected %v on given \n%s\n on \n%s", expected, g.String(), desc)
}
}
func test(t *testing.T, g *ast.Grammar, p parser.Interface, expected bool, desc string, record bool) {
if interp.HasRecursion(g) {
t.Skipf("interp was not designed to handle left recursion")
}
var m *mem.Mem
var err error
if record {
m, err = mem.NewRecord(g)
} else {
m, err = mem.New(g)
}
if err != nil {
t.Fatal(err)
}
match, err := m.Validate(p)
if err != nil {
t.Fatal(err)
}
if match != expected {
t.Fatalf("Expected %v on given \n%s\n on \n%s", expected, g.String(), desc)
}
}