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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 (
"fmt"
"strings"
"github.com/sirupsen/logrus"
)
// define api
const (
defineApiPrefix = "vl_api_"
defineApiSuffix = "_t"
)
// 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
}
const (
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[string]int{
U8: 1,
I8: 1,
U16: 2,
I16: 2,
U32: 4,
I32: 4,
U64: 8,
I64: 8,
F64: 8,
BOOL: 1,
STRING: 1,
}
var BaseTypesGo = map[string]string{
U8: "uint8",
I8: "int8",
U16: "uint16",
I16: "int16",
U32: "uint32",
I32: "int32",
U64: "uint64",
I64: "int64",
F64: "float64",
BOOL: "bool",
STRING: "string",
}
func fieldActualType(field *Field) (actual string) {
switch {
case field.TypeAlias != nil:
actual = field.TypeAlias.Type
case field.TypeEnum != nil:
actual = field.TypeEnum.Type
default:
actual = field.Type
}
return
}
func fieldGoType(g *GenFile, field *Field) string {
switch {
case field.TypeAlias != nil:
return g.GoIdent(field.TypeAlias.GoIdent)
case field.TypeEnum != nil:
return g.GoIdent(field.TypeEnum.GoIdent)
case field.TypeStruct != nil:
return g.GoIdent(field.TypeStruct.GoIdent)
case field.TypeUnion != nil:
return g.GoIdent(field.TypeUnion.GoIdent)
}
t, ok := BaseTypesGo[field.Type]
if !ok {
logrus.Panicf("type %s is not base type", field.Type)
}
return t
}
func getFieldType(g *GenFile, field *Field) string {
gotype := fieldGoType(g, field)
if field.Array {
switch gotype {
case "uint8":
return "[]byte"
case "string":
return "string"
}
if _, ok := BaseTypesGo[field.Type]; !ok && field.Length > 0 {
return fmt.Sprintf("[%d]%s", field.Length, gotype)
}
return "[]" + gotype
}
return gotype
}
func getUnionSize(union *Union) (maxSize int) {
for _, field := range union.Fields {
if size, isBaseType := getSizeOfField(field); isBaseType {
logrus.Panicf("union %s field %s has unexpected type %q", union.Name, field.Name, field.Type)
} else if size > maxSize {
maxSize = size
}
}
//logf("getUnionSize: %s %+v max=%v", union.Name, union.Fields, maxSize)
return
}
func getSizeOfField(field *Field) (size int, isBaseType bool) {
if alias := field.TypeAlias; alias != nil {
size = getSizeOfBinapiBaseType(alias.Type, alias.Length)
return
}
if enum := field.TypeEnum; enum != nil {
size = getSizeOfBinapiBaseType(enum.Type, field.Length)
return
}
if structType := field.TypeStruct; structType != nil {
size = getSizeOfStruct(structType)
return
}
if union := field.TypeUnion; union != nil {
size = getUnionSize(union)
return
}
return size, true
}
func getSizeOfStruct(typ *Struct) (size int) {
for _, field := range typ.Fields {
fieldSize, isBaseType := getSizeOfField(field)
if isBaseType {
size += getSizeOfBinapiBaseType(field.Type, field.Length)
continue
}
size += fieldSize
}
return size
}
// Returns size of base type multiplied by length. Length equal to zero
// returns base type size.
func getSizeOfBinapiBaseType(typ string, length int) (size int) {
if n := BaseTypeSizes[typ]; n > 0 {
if length > 1 {
return n * length
} else {
return n
}
}
return
}
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