more bug fixes for the rest of the extensions

nexgb/xgbgen/expression.go

@@ -18,7 +18,7 @@ type Expression interface {
 	// Eval evaluates a concrete expression. It is an error to call Eval
 	// on any expression that is not concrete (or contains any sub-expression
 	// that is not concrete).
-	Eval() uint
+	Eval() int
 
 	// Reduce attempts to evaluate any concrete sub-expressions.
 	// i.e., (1 + 2 * (5 + 1 + someSizeOfStruct) reduces to
@@ -45,7 +45,7 @@ func (e *Function) Concrete() bool {
 	return false
 }
 
-func (e *Function) Eval() uint {
+func (e *Function) Eval() int {
 	log.Fatalf("Cannot evaluate a 'Function'. It is not concrete.")
 	panic("unreachable")
 }
@@ -95,7 +95,7 @@ func (e *BinaryOp) Concrete() bool {
 	return e.Expr1.Concrete() && e.Expr2.Concrete()
 }
 
-func (e *BinaryOp) Eval() uint {
+func (e *BinaryOp) Eval() int {
 	switch e.Op {
 	case "+":
 		return e.Expr1.Eval() + e.Expr2.Eval()
@@ -108,7 +108,7 @@ func (e *BinaryOp) Eval() uint {
 	case "&":
 		return e.Expr1.Eval() & e.Expr2.Eval()
 	case "<<":
-		return e.Expr1.Eval() << e.Expr2.Eval()
+		return int(uint(e.Expr1.Eval()) << uint(e.Expr2.Eval()))
 	}
 
 	log.Fatalf("Invalid binary operator '%s' for expression.", e.Op)
@@ -161,7 +161,7 @@ func (e *UnaryOp) Concrete() bool {
 	return e.Expr.Concrete()
 }
 
-func (e *UnaryOp) Eval() uint {
+func (e *UnaryOp) Eval() int {
 	switch e.Op {
 	case "~":
 		return ^e.Expr.Eval()
@@ -196,8 +196,8 @@ func (e *Padding) Concrete() bool {
 	return e.Expr.Concrete()
 }
 
-func (e *Padding) Eval() uint {
-	return uint(pad(int(e.Expr.Eval())))
+func (e *Padding) Eval() int {
+	return pad(e.Expr.Eval())
 }
 
 func (e *Padding) Reduce(prefix string) string {
@@ -225,8 +225,8 @@ func (e *PopCount) Concrete() bool {
 	return e.Expr.Concrete()
 }
 
-func (e *PopCount) Eval() uint {
-	return popCount(e.Expr.Eval())
+func (e *PopCount) Eval() int {
+	return int(popCount(uint(e.Expr.Eval())))
 }
 
 func (e *PopCount) Reduce(prefix string) string {
@@ -246,14 +246,14 @@ func (e *PopCount) Initialize(p *Protocol) {
 
 // Value represents some constant integer.
 type Value struct {
-	v uint
+	v int
 }
 
 func (e *Value) Concrete() bool {
 	return true
 }
 
-func (e *Value) Eval() uint {
+func (e *Value) Eval() int {
 	return e.v
 }
 
@@ -269,15 +269,15 @@ func (e *Value) Initialize(p *Protocol) {}
 
 // Bit represents some bit whose value is computed by '1 << bit'.
 type Bit struct {
-	b uint
+	b int
 }
 
 func (e *Bit) Concrete() bool {
 	return true
 }
 
-func (e *Bit) Eval() uint {
-	return 1 << e.b
+func (e *Bit) Eval() int {
+	return int(1 << uint(e.b))
 }
 
 func (e *Bit) Reduce(prefix string) string {
@@ -300,7 +300,7 @@ func (e *FieldRef) Concrete() bool {
 	return false
 }
 
-func (e *FieldRef) Eval() uint {
+func (e *FieldRef) Eval() int {
 	log.Fatalf("Cannot evaluate a 'FieldRef'. It is not concrete.")
 	panic("unreachable")
 }
@@ -333,7 +333,7 @@ func (e *EnumRef) Concrete() bool {
 	return false
 }
 
-func (e *EnumRef) Eval() uint {
+func (e *EnumRef) Eval() int {
 	log.Fatalf("Cannot evaluate an 'EnumRef'. It is not concrete.")
 	panic("unreachable")
 }
@@ -361,7 +361,7 @@ func (e *SumOf) Concrete() bool {
 	return false
 }
 
-func (e *SumOf) Eval() uint {
+func (e *SumOf) Eval() int {
 	log.Fatalf("Cannot evaluate a 'SumOf'. It is not concrete.")
 	panic("unreachable")
 }

nexgb/xgbgen/field.go

@@ -142,8 +142,7 @@ func (f *ListField) Length() Size {
 // special function written in go_struct.go to compute the size (since the
 // size in this case can only be computed recursively).
 func (f *ListField) Size() Size {
-	simpleLen := &Function{
-		Name: "pad",
+	simpleLen := &Padding{
 		Expr: newBinaryOp("*", f.Length().Expression, f.Type.Size().Expression),
 	}
 

nexgb/xgbgen/go.go

@@ -150,15 +150,21 @@ func (f *ExprField) Write(c *Context, prefix string) {
 
 // Value field
 func (f *ValueField) Define(c *Context) {
-	c.Putln("// valueparam field: type: %s, mask name: %s, list name: %s",
-		f.MaskType.SrcName(), f.MaskName, f.ListName)
-	panic("todo")
+	c.Putln("%s %s", f.MaskName, f.SrcType())
+	c.Putln("%s []uint32", f.ListName)
 }
 
 func (f *ValueField) Read(c *Context, prefix string) {
-	c.Putln("// reading valueparam: type: %s, mask name: %s, list name: %s",
-		f.MaskType.SrcName(), f.MaskName, f.ListName)
-	panic("todo")
+	ReadSimpleSingleField(c,
+		fmt.Sprintf("%s%s", prefix, f.MaskName), f.MaskType)
+	c.Putln("")
+	c.Putln("%s%s = make([]uint32, %s)",
+		prefix, f.ListName, f.ListLength().Reduce(prefix))
+	c.Putln("for i := 0; i < %s; i++ {", f.ListLength().Reduce(prefix))
+	c.Putln("%s%s[i] = Get32(buf[b:])", prefix, f.ListName)
+	c.Putln("b += 4")
+	c.Putln("}")
+	c.Putln("b = pad(b)")
 }
 
 func (f *ValueField) Write(c *Context, prefix string) {

nexgb/xgbgen/go_struct.go

@@ -104,7 +104,11 @@ func (s *Struct) WriteListSize(c *Context) {
 	c.Putln("// Struct list size %s", s.SrcName())
 	c.Putln("func %sListSize(list []%s) int {", s.SrcName(), s.SrcName())
 	c.Putln("size := 0")
-	c.Putln("for _, item := range list {")
+	if s.Size().Expression.Concrete() {
+		c.Putln("for _ = range list {")
+	} else {
+		c.Putln("for _, item := range list {")
+	}
 	c.Putln("size += %s", s.Size().Reduce("item."))
 	c.Putln("}")
 	c.Putln("return size")

nexgb/xgbgen/size.go

@@ -11,7 +11,7 @@ type Size struct {
 
 // newFixedSize creates a new Size with some fixed and known value.
 func newFixedSize(fixed uint) Size {
-	return Size{&Value{v: fixed}}
+	return Size{&Value{v: int(fixed)}}
 }
 
 // newExpressionSize creates a new Size with some expression.

nexgb/xgbgen/translation.go

@@ -89,7 +89,7 @@ func (xml *XML) Translate() *Protocol {
 		if !ok {
 			continue
 		}
-		nextValue := uint(0)
+		nextValue := 0
 		for _, item := range enum.Items {
 			if item.Expr == nil {
 				item.Expr = &Value{v: nextValue}
@@ -267,16 +267,16 @@ func (x *XMLExpression) Translate() Expression {
 			Expr: x.Exprs[0].Translate(),
 		}
 	case "value":
-		val, err := strconv.Atoi(x.Data)
+		val, err := strconv.Atoi(strings.TrimSpace(x.Data))
 		if err != nil {
 			log.Panicf("Could not convert '%s' in 'value' expression to int.",
 				x.Data)
 		}
 		return &Value{
-			v: uint(val),
+			v: val,
 		}
 	case "bit":
-		bit, err := strconv.Atoi(x.Data)
+		bit, err := strconv.Atoi(strings.TrimSpace(x.Data))
 		if err != nil {
 			log.Panicf("Could not convert '%s' in 'bit' expression to int.",
 				x.Data)
@@ -286,7 +286,7 @@ func (x *XMLExpression) Translate() Expression {
 				" is %d", bit)
 		}
 		return &Bit{
-			b: uint(bit),
+			b: bit,
 		}
 	case "fieldref":
 		return &FieldRef{