--- /dev/null
+// Copyright (c) 2020 Cisco and/or its affiliates.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at:
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package binapigen
+
+import (
+ "fmt"
+ "strconv"
+ "strings"
+
+ "github.com/sirupsen/logrus"
+)
+
+func init() {
+ //RegisterPlugin("encoding", GenerateEncoding)
+}
+
+func generateMessageSize(g *GenFile, name string, fields []*Field) {
+ g.P("func (m *", name, ") Size() int {")
+ g.P("if m == nil { return 0 }")
+ g.P("var size int")
+
+ sizeBaseType := func(typ, name string, length int, sizefrom string) {
+ switch typ {
+ case STRING:
+ if length > 0 {
+ g.P("size += ", length, " // ", name)
+ } else {
+ g.P("size += 4 + len(", name, ")", " // ", name)
+ }
+ default:
+ var size = BaseTypeSizes[typ]
+ if sizefrom != "" {
+ g.P("size += ", size, " * len(", name, ")", " // ", name)
+ } else {
+ if length > 0 {
+ g.P("size += ", size, " * ", length, " // ", name)
+ } else {
+ g.P("size += ", size, " // ", name)
+ }
+ }
+ }
+ }
+
+ lvl := 0
+ var sizeFields func(fields []*Field, parentName string)
+ sizeFields = func(fields []*Field, parentName string) {
+ lvl++
+ defer func() { lvl-- }()
+
+ getFieldName := func(name string) string {
+ return fmt.Sprintf("%s.%s", parentName, name)
+ }
+
+ for _, field := range fields {
+ name := getFieldName(field.GoName)
+
+ var sizeFromName string
+ if field.FieldSizeFrom != nil {
+ sizeFromName = getFieldName(field.FieldSizeFrom.GoName)
+ }
+
+ if _, ok := BaseTypesGo[field.Type]; ok {
+ sizeBaseType(field.Type, name, field.Length, sizeFromName)
+ continue
+ }
+
+ if field.Array {
+ char := fmt.Sprintf("s%d", lvl)
+ index := fmt.Sprintf("j%d", lvl)
+ if field.Length > 0 {
+ g.P("for ", index, " := 0; ", index, " < ", field.Length, "; ", index, "++ {")
+ } else if field.FieldSizeFrom != nil {
+ g.P("for ", index, " := 0; ", index, " < len(", name, "); ", index, "++ {")
+ }
+ g.P("var ", char, " ", fieldGoType(g, field))
+ g.P("_ = ", char)
+ g.P("if ", index, " < len(", name, ") { ", char, " = ", name, "[", index, "] }")
+ name = char
+ }
+
+ switch {
+ case field.TypeEnum != nil:
+ enum := field.TypeEnum
+ if _, ok := BaseTypesGo[enum.Type]; ok {
+ sizeBaseType(enum.Type, name, 0, "")
+ } else {
+ logrus.Panicf("\t// ??? ENUM %s %s\n", name, enum.Type)
+ }
+ case field.TypeAlias != nil:
+ alias := field.TypeAlias
+ if typ := alias.TypeStruct; typ != nil {
+ sizeFields(typ.Fields, name)
+ } else {
+ sizeBaseType(alias.Type, name, alias.Length, "")
+ }
+ case field.TypeStruct != nil:
+ typ := field.TypeStruct
+ sizeFields(typ.Fields, name)
+ case field.TypeUnion != nil:
+ union := field.TypeUnion
+ maxSize := getUnionSize(union)
+ sizeBaseType("u8", name, maxSize, "")
+ default:
+ logrus.Panicf("\t// ??? buf[pos] = %s (%s)\n", name, field.Type)
+ }
+
+ if field.Array {
+ g.P("}")
+ }
+ }
+ }
+ sizeFields(fields, "m")
+
+ g.P("return size")
+ g.P("}")
+}
+
+func encodeBaseType(g *GenFile, typ, name string, length int, sizefrom string) {
+ isArray := length > 0 || sizefrom != ""
+ if isArray {
+ switch typ {
+ case U8:
+ g.P("buf.EncodeBytes(", name, "[:], ", length, ")")
+ return
+ case I8, I16, U16, I32, U32, I64, U64, F64:
+ gotype := BaseTypesGo[typ]
+ if length != 0 {
+ g.P("for i := 0; i < ", length, "; i++ {")
+ } else if sizefrom != "" {
+ g.P("for i := 0; i < len(", name, "); i++ {")
+ }
+ g.P("var x ", gotype)
+ g.P("if i < len(", name, ") { x = ", gotype, "(", name, "[i]) }")
+ name = "x"
+ }
+ }
+ switch typ {
+ case I8, U8, I16, U16, I32, U32, I64, U64:
+ typsize := BaseTypeSizes[typ]
+ g.P("buf.EncodeUint", typsize*8, "(uint", typsize*8, "(", name, "))")
+ case F64:
+ g.P("buf.EncodeFloat64(float64(", name, "))")
+ case BOOL:
+ g.P("buf.EncodeBool(", name, ")")
+ case STRING:
+ g.P("buf.EncodeString(", name, ", ", length, ")")
+ default:
+ logrus.Panicf("// ??? %s %s\n", name, typ)
+ }
+ if isArray {
+ switch typ {
+ case I8, U8, I16, U16, I32, U32, I64, U64, F64:
+ g.P("}")
+ }
+ }
+}
+
+func encodeFields(g *GenFile, fields []*Field, parentName string, lvl int) {
+ getFieldName := func(name string) string {
+ return fmt.Sprintf("%s.%s", parentName, name)
+ }
+
+ for _, field := range fields {
+ name := getFieldName(field.GoName)
+
+ encodeField(g, field, name, getFieldName, lvl)
+ }
+}
+
+func encodeField(g *GenFile, field *Field, name string, getFieldName func(name string) string, lvl int) {
+ if f := field.FieldSizeOf; f != nil {
+ if _, ok := BaseTypesGo[field.Type]; ok {
+ encodeBaseType(g, field.Type, fmt.Sprintf("len(%s)", getFieldName(f.GoName)), field.Length, "")
+ return
+ } else {
+ panic(fmt.Sprintf("failed to encode base type of sizefrom field: %s (%s)", field.Name, field.Type))
+ }
+ }
+ var sizeFromName string
+ if field.FieldSizeFrom != nil {
+ sizeFromName = getFieldName(field.FieldSizeFrom.GoName)
+ }
+
+ if _, ok := BaseTypesGo[field.Type]; ok {
+ encodeBaseType(g, field.Type, name, field.Length, sizeFromName)
+ return
+ }
+
+ if field.Array {
+ char := fmt.Sprintf("v%d", lvl)
+ index := fmt.Sprintf("j%d", lvl)
+ if field.Length > 0 {
+ g.P("for ", index, " := 0; ", index, " < ", field.Length, "; ", index, "++ {")
+ } else if field.SizeFrom != "" {
+ g.P("for ", index, " := 0; ", index, " < len(", name, "); ", index, "++ {")
+ }
+ g.P("var ", char, " ", fieldGoType(g, field))
+ g.P("if ", index, " < len(", name, ") { ", char, " = ", name, "[", index, "] }")
+ name = char
+ }
+
+ switch {
+ case field.TypeEnum != nil:
+ encodeBaseType(g, field.TypeEnum.Type, name, 0, "")
+ case field.TypeAlias != nil:
+ alias := field.TypeAlias
+ if typ := alias.TypeStruct; typ != nil {
+ encodeFields(g, typ.Fields, name, lvl+1)
+ } else {
+ encodeBaseType(g, alias.Type, name, alias.Length, "")
+ }
+ case field.TypeStruct != nil:
+ encodeFields(g, field.TypeStruct.Fields, name, lvl+1)
+ case field.TypeUnion != nil:
+ g.P("buf.EncodeBytes(", name, ".", fieldUnionData, "[:], 0)")
+ default:
+ logrus.Panicf("\t// ??? buf[pos] = %s (%s)\n", name, field.Type)
+ }
+
+ if field.Array {
+ g.P("}")
+ }
+}
+
+func generateMessageMarshal(g *GenFile, name string, fields []*Field) {
+ g.P("func (m *", name, ") Marshal(b []byte) ([]byte, error) {")
+ g.P("var buf *", govppCodecPkg.Ident("Buffer"))
+ g.P("if b == nil {")
+ g.P("buf = ", govppCodecPkg.Ident("NewBuffer"), "(make([]byte, m.Size()))")
+ g.P("} else {")
+ g.P("buf = ", govppCodecPkg.Ident("NewBuffer"), "(b)")
+ g.P("}")
+
+ encodeFields(g, fields, "m", 0)
+
+ g.P("return buf.Bytes(), nil")
+ g.P("}")
+}
+
+func decodeBaseType(g *GenFile, typ, orig, name string, length int, sizefrom string, alloc bool) {
+ isArray := length > 0 || sizefrom != ""
+ if isArray {
+ switch typ {
+ case U8:
+ g.P("copy(", name, "[:], buf.DecodeBytes(", length, "))")
+ return
+ case I8, I16, U16, I32, U32, I64, U64, F64:
+ if alloc {
+ var size string
+ switch {
+ case length > 0:
+ size = strconv.Itoa(length)
+ case sizefrom != "":
+ size = sizefrom
+ }
+ if size != "" {
+ g.P(name, " = make([]", orig, ", ", size, ")")
+ }
+ }
+ g.P("for i := 0; i < len(", name, "); i++ {")
+ name = fmt.Sprintf("%s[i]", name)
+ }
+ }
+ switch typ {
+ case I8, U8, I16, U16, I32, U32, I64, U64:
+ typsize := BaseTypeSizes[typ]
+ if gotype, ok := BaseTypesGo[typ]; !ok || gotype != orig || strings.HasPrefix(orig, "i") {
+ g.P(name, " = ", orig, "(buf.DecodeUint", typsize*8, "())")
+ } else {
+ g.P(name, " = buf.DecodeUint", typsize*8, "()")
+ }
+ case F64:
+ g.P(name, " = ", orig, "(buf.DecodeFloat64())")
+ case BOOL:
+ g.P(name, " = buf.DecodeBool()")
+ case STRING:
+ g.P(name, " = buf.DecodeString(", length, ")")
+ default:
+ logrus.Panicf("\t// ??? %s %s\n", name, typ)
+ }
+ if isArray {
+ switch typ {
+ case I8, U8, I16, U16, I32, U32, I64, U64, F64:
+ g.P("}")
+ }
+ }
+}
+
+func generateMessageUnmarshal(g *GenFile, name string, fields []*Field) {
+ g.P("func (m *", name, ") Unmarshal(b []byte) error {")
+
+ if len(fields) > 0 {
+ g.P("buf := ", govppCodecPkg.Ident("NewBuffer"), "(b)")
+ decodeFields(g, fields, "m", 0)
+ }
+
+ g.P("return nil")
+ g.P("}")
+}
+
+func decodeFields(g *GenFile, fields []*Field, parentName string, lvl int) {
+ getFieldName := func(name string) string {
+ return fmt.Sprintf("%s.%s", parentName, name)
+ }
+
+ for _, field := range fields {
+ name := getFieldName(field.GoName)
+
+ decodeField(g, field, name, getFieldName, lvl)
+ }
+}
+
+func decodeField(g *GenFile, field *Field, name string, getFieldName func(string) string, lvl int) {
+ var sizeFromName string
+ if field.FieldSizeFrom != nil {
+ sizeFromName = getFieldName(field.FieldSizeFrom.GoName)
+ }
+
+ if _, ok := BaseTypesGo[field.Type]; ok {
+ decodeBaseType(g, field.Type, fieldGoType(g, field), name, field.Length, sizeFromName, true)
+ return
+ }
+
+ if field.Array {
+ index := fmt.Sprintf("j%d", lvl)
+ if field.Length > 0 {
+ g.P("for ", index, " := 0; ", index, " < ", field.Length, ";", index, "++ {")
+ } else if field.SizeFrom != "" {
+ g.P(name, " = make(", getFieldType(g, field), ", int(", sizeFromName, "))")
+ g.P("for ", index, " := 0; ", index, " < len(", name, ");", index, "++ {")
+ }
+ name = fmt.Sprintf("%s[%s]", name, index)
+ }
+
+ if enum := field.TypeEnum; enum != nil {
+ if _, ok := BaseTypesGo[enum.Type]; ok {
+ decodeBaseType(g, enum.Type, fieldGoType(g, field), name, 0, "", false)
+ } else {
+ logrus.Panicf("\t// ??? ENUM %s %s\n", name, enum.Type)
+ }
+ } else if alias := field.TypeAlias; alias != nil {
+ if typ := alias.TypeStruct; typ != nil {
+ decodeFields(g, typ.Fields, name, lvl+1)
+ } else {
+ if alias.Length > 0 {
+ decodeBaseType(g, alias.Type, BaseTypesGo[alias.Type], name, alias.Length, "", false)
+ } else {
+ decodeBaseType(g, alias.Type, fieldGoType(g, field), name, alias.Length, "", false)
+ }
+ }
+ } else if typ := field.TypeStruct; typ != nil {
+ decodeFields(g, typ.Fields, name, lvl+1)
+ } else if union := field.TypeUnion; union != nil {
+ maxSize := getUnionSize(union)
+ g.P("copy(", name, ".", fieldUnionData, "[:], buf.DecodeBytes(", maxSize, "))")
+ } else {
+ logrus.Panicf("\t// ??? %s (%v)\n", field.GoName, field.Type)
+ }
+
+ if field.Array {
+ g.P("}")
+ }
+}
Code Review / govpp.git / blobdiff