uint64 fixed is a thing

bit/decode.go

@@ -61,62 +61,42 @@ func ReadUBitVarFP(r Reader) uint64 {
 // in little-endian order. The most-significant bit of each byte represents a
 // continuation bit.
 func ReadVarInt(r Reader) uint64 {
-	var (
-		x     uint64
-		b     uint64
-		shift uint
-	)
-	for ; shift < 64; shift += 7 {
-		b = r.ReadBits(8)
+	var x uint64
+	var s uint
+	for i := 0; ; i++ {
+		b := r.ReadBits(8)
 		if r.Err() != nil {
 			return 0
 		}
-		x |= b & 0x7f << shift
-		if b&0x80 == 0 {
-			return x
+		if b < 0x80 {
+			if i > 9 || i == 9 && b > 1 {
+				panic("varint overflow")
 			}
+			return x | b<<s
+		}
+		x |= b & 0x7f << s
+		s += 7
 	}
-	return x
 }
 
 // reads a 32bit varint
 func ReadVarInt32(r Reader) uint32 {
-	var (
-		x     uint64
-		b     uint64
-		shift uint
-	)
-	for ; shift < 32; shift += 7 {
-		b = r.ReadBits(8)
+	var x uint32
+	var s uint
+	for i := 0; ; i++ {
+		b := r.ReadBits(8)
 		if r.Err() != nil {
 			return 0
 		}
-		x |= b & 0x7f << shift
-		if b&0x80 == 0 {
-			return uint32(x)
-		}
-	}
-	return uint32(x)
-}
-
-// reads a 32bit varint
-func ReadVarInt16(r Reader) uint16 {
-	var (
-		x     uint64
-		b     uint64
-		shift uint
-	)
-	for ; shift < 16; shift += 7 {
-		b = r.ReadBits(8)
-		if r.Err() != nil {
-			return 0
+		if b < 0x80 {
+			if i > 4 || i == 4 && b > 0xf {
+				panic("varint32 overflow")
 			}
-		x |= b & 0x7f << shift
-		if b&0x80 == 0 {
-			return uint16(x)
+			return x | uint32(b)<<s
 		}
+		x |= uint32(b&0x7f) << s
+		s += 7
 	}
-	return uint16(x)
 }
 
 func ReadBool(r Reader) bool {

ent/array.go

@@ -20,10 +20,10 @@ func arrayType(spec *typeSpec, env *Env) tÿpe {
 	elemSpec := *spec
 	elemSpec.typeName = elemName
 	elemType := parseTypeSpec(&elemSpec, env)
-	return &array_t{elemType, count}
+	return &array_t{elem: elemType, count: count}
 }
 
-func parseArrayName(s string) (string, int) {
+func parseArrayName(s string) (string, uint) {
 	runes := []rune(s)
 	if runes[len(runes)-1] != ']' {
 		panic("invalid array type name: " + s)
@@ -38,7 +38,7 @@ func parseArrayName(s string) (string, int) {
 					panic("invalid array type name: " + err.Error())
 				}
 			}
-			return strings.TrimSpace(string(runes[:i])), n
+			return strings.TrimSpace(string(runes[:i])), uint(n)
 		}
 	}
 	panic("invalid array type name: " + s)
@@ -46,7 +46,15 @@ func parseArrayName(s string) (string, int) {
 
 type array_t struct {
 	elem  tÿpe
-	count int
+	count uint
+	bits  uint
+}
+
+func (t *array_t) sizeBits() uint {
+	if t.bits == 0 {
+		t.bits = bit.Length(t.count)
+	}
+	return t.bits
 }
 
 func (t *array_t) nü() value       { return array{t: t, slots: make([]value, t.count)} }
@@ -60,7 +68,9 @@ type array struct {
 func (a array) tÿpe() tÿpe { return a.t }
 
 func (a array) read(r bit.Reader) error {
-	for i := range a.slots {
+	n := r.ReadBits(a.t.bits)
+	Debug.Printf("reading %d array elements", n)
+	for i := uint64(0); i < n; i++ {
 		if a.slots[i] == nil {
 			a.slots[i] = a.t.elem.nü()
 		}

ent/atoms.go

@@ -48,7 +48,7 @@ type uint8_v uint8
 
 func (v uint8_v) tÿpe() tÿpe { return uint8_t }
 func (v *uint8_v) read(r bit.Reader) error {
-	*v = uint8_v(r.ReadBits(8))
+	*v = uint8_v(bit.ReadVarInt32(r))
 	return r.Err()
 }
 
@@ -71,7 +71,7 @@ type uint16_v uint16
 
 func (v uint16_v) tÿpe() tÿpe { return uint16_t }
 func (v *uint16_v) read(r bit.Reader) error {
-	*v = uint16_v(bit.ReadVarInt16(r))
+	*v = uint16_v(bit.ReadVarInt32(r))
 	return r.Err()
 }
 
@@ -94,11 +94,7 @@ type uint32_v uint32
 
 func (v uint32_v) tÿpe() tÿpe { return uint32_t }
 func (v *uint32_v) read(r bit.Reader) error {
-	u := bit.ReadVarInt(r)
-	if u > 1<<32-1 {
-		return fmt.Errorf("uint32 overflow: %d", u)
-	}
-	*v = uint32_v(u)
+	*v = uint32_v(bit.ReadVarInt32(r))
 	return r.Err()
 }
 
@@ -121,7 +117,7 @@ type uint64_v uint64
 
 func (v uint64_v) tÿpe() tÿpe { return uint64_t }
 func (v *uint64_v) read(r bit.Reader) error {
-	*v = uint64_v(bit.ReadVarInt(r))
+	*v = uint64_v(bit.ReadVarInt32(r))
 	return r.Err()
 }
 
@@ -129,6 +125,31 @@ func (v uint64_v) String() string {
 	return strconv.FormatUint(uint64(v), 10)
 }
 
+// ------------------------------------------------------------------------------
+// uint64fixed
+//
+// (a uint64 value that is always represented on the wire with 64 bits)
+// ------------------------------------------------------------------------------
+
+var uint64fixed_t = &typeLiteral{
+	name: "uint64fixed",
+	newFn: func() value {
+		return new(uint64fixed_v)
+	},
+}
+
+type uint64fixed_v uint64
+
+func (v uint64fixed_v) tÿpe() tÿpe { return uint64fixed_t }
+func (v *uint64fixed_v) read(r bit.Reader) error {
+	*v = uint64fixed_v(r.ReadBits(64))
+	return r.Err()
+}
+
+func (v uint64fixed_v) String() string {
+	return strconv.FormatUint(uint64(v), 10)
+}
+
 // ------------------------------------------------------------------------------
 // int8
 // ------------------------------------------------------------------------------
@@ -153,6 +174,30 @@ func (v int8_v) String() string {
 	return strconv.FormatInt(int64(v), 10)
 }
 
+// ------------------------------------------------------------------------------
+// int16
+// ------------------------------------------------------------------------------
+
+var int16_t = &typeLiteral{
+	name: "int16",
+	newFn: func() value {
+		return new(int16_v)
+	},
+}
+
+type int16_v int16
+
+func (v int16_v) tÿpe() tÿpe { return int16_t }
+func (v *int16_v) read(r bit.Reader) error {
+	// TODO: bounds check here?
+	*v = int16_v(bit.ReadZigZag32(r))
+	return r.Err()
+}
+
+func (v int16_v) String() string {
+	return strconv.FormatInt(int64(v), 10)
+}
+
 // ------------------------------------------------------------------------------
 // int32
 // ------------------------------------------------------------------------------
@@ -176,6 +221,29 @@ func (v int32_v) String() string {
 	return strconv.FormatInt(int64(v), 10)
 }
 
+// ------------------------------------------------------------------------------
+// int64
+// ------------------------------------------------------------------------------
+
+var int64_t = &typeLiteral{
+	name: "int64",
+	newFn: func() value {
+		return new(int64_v)
+	},
+}
+
+type int64_v int64
+
+func (v int64_v) tÿpe() tÿpe { return int64_t }
+func (v *int64_v) read(r bit.Reader) error {
+	*v = int64_v(bit.ReadZigZag(r))
+	return r.Err()
+}
+
+func (v int64_v) String() string {
+	return strconv.FormatInt(int64(v), 10)
+}
+
 // ------------------------------------------------------------------------------
 // CUtlStringToken
 //
@@ -229,24 +297,70 @@ func (c color) String() string {
 	return fmt.Sprintf("#%x%x%x%x", c.r, c.g, c.b, c.a)
 }
 
+// ------------------------------------------------------------------------------
+// CUtlSymbolLarge
+// ------------------------------------------------------------------------------
+
+var cutl_string_t = typeLiteral{
+	name: "CUtlSymbolLarge",
+	newFn: func() value {
+		return new(cutl_string_v)
+	},
+}
+
+type cutl_string_v string
+
+func (v cutl_string_v) tÿpe() tÿpe     { return cutl_string_t }
+func (v cutl_string_v) String() string { return string(v) }
+func (v *cutl_string_v) read(r bit.Reader) error {
+	*v = cutl_string_v(bit.ReadString(r))
+	return r.Err()
+}
+
 var atom_types = []tÿpe{
 	bool_t,
 	uint8_t,
 	uint16_t,
 	uint32_t,
-	uint64_t,
 	int8_t,
+	int16_t,
 	int32_t,
+	int64_t,
 	stringToken_t,
 	color_t,
+	cutl_string_t,
 }
 
 func atomType(spec *typeSpec, env *Env) tÿpe {
 	for _, t := range atom_types {
 		if t.typeName() == spec.typeName {
 			Debug.Printf("  atom type: %s", t.typeName())
+			if spec.bits != 0 {
+				return typeError("spec can't be atom type: has bit specification: %v", spec)
+			}
+			if spec.encoder != "" {
+				return typeError("spec can't be atom type: has encoder specification: %v", spec)
+			}
+			if spec.flags != 0 {
+				return typeError("spec can't be atom type: has flags: %v", spec)
+			}
+			if spec.high != 0 {
+				return typeError("spec can't be atom type: has high value constraint: %v", spec)
+			}
+			if spec.low != 0 {
+				return typeError("spec can't be atom type: has low value constraint: %v", spec)
+			}
+			if spec.serializer != "" {
+				return typeError("spec can't be atom type: has serializer: %v", spec)
+			}
 			return t
 		}
 	}
+	if spec.typeName == "uint64" {
+		if spec.encoder == "fixed64" {
+			return uint64fixed_t
+		}
+		return uint64_t
+	}
 	return nil
 }

ent/env.go

@@ -63,6 +63,9 @@ func (e *Env) mergeSendTables(m *dota.CDemoSendTables) error {
 	if err != nil {
 		return wrap(err, "unable to get serializers in sendtables")
 	}
+	for i, s := range flat.GetSymbols() {
+		Debug.Printf("symbol %d: %s", i, s)
+	}
 	e.symbols = symbolTable(flat.GetSymbols())
 	e.stubClasses(flat)
 	if err := e.parseFields(flat); err != nil {

ent/generic.go

@@ -42,10 +42,10 @@ func genericName(name string) ([2]string, error) {
 	for i, r := range runes {
 		if r == '<' {
 			if depth == 0 {
+				b_start = i
 				out[0] = strings.TrimSpace(string(runes[0:i]))
 			}
 			depth++
-			b_start = i
 		}
 		if r == '>' {
 			depth--
@@ -89,6 +89,7 @@ func (v *cutl_vector) tÿpe() tÿpe { return v.t }
 
 func (v *cutl_vector) read(r bit.Reader) error {
 	count := bit.ReadVarInt32(r)
+	Debug.Printf("allocating cutl_vector of size %d with element type %s", count, v.t.elem.typeName())
 	v.slots = make([]value, count)
 	return r.Err()
 }

ent/selection.go

@@ -30,11 +30,12 @@ func (s selection) fillSlotsIter(offset int, dest slotted, path string, r bit.Re
 	}
 	switch s.count - offset {
 	case 1:
+		old := dest.getSlotValue(slot)
 		v := dest.slotType(slot).nü()
+		Debug.Printf("%v %s.%s (%s) %v read", s, path, dest.slotName(slot), dest.slotType(slot).typeName(), old)
 		if err := v.read(r); err != nil {
 			return fmt.Errorf("unable to fill selection %v for %s.%s (%s): %v", s, path, dest.slotName(slot), dest.slotType(slot).typeName(), err)
 		}
-		old := dest.getSlotValue(slot)
 		dest.setSlotValue(slot, v)
 		Debug.Printf("%v %s.%s (%s) %v -> %v", s, path, dest.slotName(slot), dest.slotType(slot).typeName(), old, v)
 		return nil