/
delegate.go
73 lines (62 loc) · 2.04 KB
/
delegate.go
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package backend
import (
"fmt"
"github.com/OffchainLabs/methodical-ssz/sszgen/interfaces"
"github.com/OffchainLabs/methodical-ssz/sszgen/types"
)
// "Delegate" meaning a type that defines it's own ssz methodset
type generateDelegate struct {
types.ValRep
targetPackage string
importNamer *ImportNamer
}
func (g *generateDelegate) generateHTRPutter(fieldName string) string {
fullTmpl := `if err := %s.HashTreeRootWith(hh); err != nil {
return err
}`
lightTmpl := `if hash, err := %s.HashTreeRoot(); err != nil {
return err
} else {
hh.AppendBytes32(hash[:])
}`
if g.SatisfiesInterface(interfaces.SszFullHasher) {
return fmt.Sprintf(fullTmpl, fieldName)
}
return fmt.Sprintf(lightTmpl, fieldName)
}
func (g *generateDelegate) variableSizeSSZ(fieldName string) string {
return fmt.Sprintf("%s.SizeSSZ()", fieldName)
}
func (g *generateDelegate) generateUnmarshalValue(fieldName string, sliceName string) string {
t := `if err = %s.UnmarshalSSZ(%s); err != nil {
return err
}`
return fmt.Sprintf(t, fieldName, sliceName)
}
func (g *generateDelegate) generateFixedMarshalValue(fieldName string) string {
if g.IsVariableSized() {
return fmt.Sprintf(`dst = ssz.WriteOffset(dst, offset)
offset += %s.SizeSSZ()`, fieldName)
}
return g.generateDelegateFieldMarshalSSZ(fieldName)
}
// method that generates code which calls the MarshalSSZ method of the field
func (g *generateDelegate) generateDelegateFieldMarshalSSZ(fieldName string) string {
return fmt.Sprintf(`if dst, err = %s.MarshalSSZTo(dst); err != nil {
return nil, err
}`, fieldName)
}
func (g *generateDelegate) generateVariableMarshalValue(fieldName string) string {
return g.generateDelegateFieldMarshalSSZ(fieldName)
}
func (g *generateDelegate) initializeValue() string {
switch vt := g.ValRep.(type) {
case *types.ValuePointer:
return fmt.Sprintf("new(%s)", fullyQualifiedTypeName(vt.Referent, g.targetPackage, g.importNamer))
default:
return ""
}
}
var _ valueGenerator = &generateDelegate{}
var _ htrPutter = &generateDelegate{}
var _ valueInitializer = &generateDelegate{}