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// Copyright (c) 2019 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 main
import (
"fmt"
"strconv"
"strings"
"github.com/sirupsen/logrus"
)
// toApiType returns name that is used as type reference in VPP binary API
func toApiType(name string) string {
return fmt.Sprintf("vl_api_%s_t", name)
}
// 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",
}
func getBinapiTypeSize(binapiType string) int {
if _, ok := binapiTypes[binapiType]; ok {
b, err := strconv.Atoi(strings.TrimLeft(binapiType, "uif"))
if err == nil {
return b / 8
}
}
return -1
}
// convertToGoType translates the VPP binary API type into Go type
func convertToGoType(ctx *context, binapiType string) (typ string) {
if t, ok := binapiTypes[binapiType]; ok {
// basic types
typ = t
} else if r, ok := ctx.packageData.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 getSizeOfType(ctx *context, typ *Type) (size int) {
for _, field := range typ.Fields {
enum := getEnumByRef(ctx, field.Type)
if enum != nil {
size += getSizeOfBinapiTypeLength(enum.Type, field.Length)
continue
}
size += getSizeOfBinapiTypeLength(field.Type, field.Length)
}
return size
}
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 getEnumByRef(ctx *context, ref string) *Enum {
for _, typ := range ctx.packageData.Enums {
if ref == toApiType(typ.Name) {
return &typ
}
}
return nil
}
func getTypeByRef(ctx *context, ref string) *Type {
for _, typ := range ctx.packageData.Types {
if ref == toApiType(typ.Name) {
return &typ
}
}
return nil
}
func getAliasByRef(ctx *context, ref string) *Alias {
for _, alias := range ctx.packageData.Aliases {
if ref == toApiType(alias.Name) {
return &alias
}
}
return nil
}
func getUnionSize(ctx *context, union *Union) (maxSize int) {
for _, field := range union.Fields {
typ := getTypeByRef(ctx, field.Type)
if typ != nil {
if size := getSizeOfType(ctx, typ); size > maxSize {
maxSize = size
}
continue
}
alias := getAliasByRef(ctx, 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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