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// 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 (
"strings"
"github.com/sirupsen/logrus"
)
// define api
const (
defineApiPrefix = "vl_api_"
defineApiSuffix = "_t"
)
// BaseType represents base types in VPP binary API.
type BaseType int
const (
U8 BaseType = iota + 1
I8
U16
I16
U32
I32
U64
I64
F64
BOOL
STRING
)
var (
BaseTypes = map[BaseType]string{
U8: "u8",
I8: "i8",
U16: "u16",
I16: "i16",
U32: "u32",
I32: "i32",
U64: "u64",
I64: "i64",
F64: "f64",
BOOL: "bool",
STRING: "string",
}
BaseTypeNames = map[string]BaseType{
"u8": U8,
"i8": I8,
"u16": U16,
"i16": I16,
"u32": U32,
"i32": I32,
"u64": U64,
"i64": I64,
"f64": F64,
"bool": BOOL,
"string": STRING,
}
)
var BaseTypeSizes = map[BaseType]int{
U8: 1,
I8: 1,
U16: 2,
I16: 2,
U32: 4,
I32: 4,
U64: 8,
I64: 8,
F64: 8,
BOOL: 1,
STRING: 1,
}
type Kind int
const (
_ = iota
Uint8Kind
Int8Kind
Uint16Kind
Int16Kind
Uint32Kind
Int32Kind
Uint64Kind
Int64Kind
Float64Kind
BoolKind
StringKind
EnumKind
AliasKind
StructKind
UnionKind
MessageKind
)
// toApiType returns name that is used as type reference in VPP binary API
func toApiType(name string) string {
return defineApiPrefix + name + defineApiSuffix
}
func fromApiType(typ string) string {
name := typ
name = strings.TrimPrefix(name, defineApiPrefix)
name = strings.TrimSuffix(name, defineApiSuffix)
return name
}
func getSizeOfType(module *File, typ *Struct) (size int) {
for _, field := range typ.Fields {
enum := getEnumByRef(module, field.Type)
if enum != nil {
size += getSizeOfBinapiTypeLength(enum.Type, field.Length)
continue
}
size += getSizeOfBinapiTypeLength(field.Type, field.Length)
}
return size
}
func getEnumByRef(file *File, ref string) *Enum {
for _, typ := range file.Enums {
if ref == toApiType(typ.Name) {
return typ
}
}
return nil
}
func getTypeByRef(file *File, ref string) *Struct {
for _, typ := range file.Structs {
if ref == toApiType(typ.Name) {
return typ
}
}
return nil
}
func getAliasByRef(file *File, ref string) *Alias {
for _, alias := range file.Aliases {
if ref == toApiType(alias.Name) {
return alias
}
}
return nil
}
func getUnionByRef(file *File, ref string) *Union {
for _, union := range file.Unions {
if ref == toApiType(union.Name) {
return union
}
}
return nil
}
func getBinapiTypeSize(binapiType string) (size int) {
typName := BaseTypeNames[binapiType]
return BaseTypeSizes[typName]
}
// binapiTypes is a set of types used VPP binary API for translation to Go types
var binapiTypes = map[string]string{
"u8": "uint8",
"i8": "int8",
"u16": "uint16",
"i16": "int16",
"u32": "uint32",
"i32": "int32",
"u64": "uint64",
"i64": "int64",
"f64": "float64",
}
var BaseTypesGo = map[BaseType]string{
U8: "uint8",
I8: "int8",
U16: "uint16",
I16: "int16",
U32: "uint32",
I32: "int32",
U64: "uint64",
I64: "int64",
F64: "float64",
BOOL: "bool",
STRING: "string",
}
func getActualType(file *File, typ string) (actual string) {
for _, enum := range file.Enums {
if enum.GoName == typ {
return enum.Type
}
}
for _, alias := range file.Aliases {
if alias.GoName == typ {
return alias.Type
}
}
return typ
}
// convertToGoType translates the VPP binary API type into Go type
func convertToGoType(file *File, binapiType string) (typ string) {
if t, ok := binapiTypes[binapiType]; ok {
// basic types
typ = t
} else if r, ok := file.refmap[binapiType]; ok {
// specific types (enums/types/unions)
typ = camelCaseName(r)
} else {
switch binapiType {
case "bool", "string":
typ = binapiType
default:
// fallback type
logrus.Warnf("found unknown VPP binary API type %q, using byte", binapiType)
typ = "byte"
}
}
return typ
}
func getSizeOfBinapiTypeLength(typ string, length int) (size int) {
if n := getBinapiTypeSize(typ); n > 0 {
if length > 0 {
return n * length
} else {
return n
}
}
return
}
func getUnionSize(file *File, union *Union) (maxSize int) {
for _, field := range union.Fields {
typ := getTypeByRef(file, field.Type)
if typ != nil {
if size := getSizeOfType(file, typ); size > maxSize {
maxSize = size
}
continue
}
alias := getAliasByRef(file, field.Type)
if alias != nil {
if size := getSizeOfBinapiTypeLength(alias.Type, alias.Length); size > maxSize {
maxSize = size
}
continue
} else {
logf("no type or alias found for union %s field type %q", union.Name, field.Type)
continue
}
}
logf("getUnionSize: %s %+v max=%v", union.Name, union.Fields, maxSize)
return
}
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