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package json
import (
"fmt"
"reflect"
)
// Transition functions for recognizing BinData.
// Adapted from encoding/json/scanner.go.
// stateB is the state after reading `B`.
func stateB(s *scanner, c int) int {
if c == 'i' {
s.step = generateState("BinData", []byte("nData"), stateConstructor)
return scanContinue
}
return s.error(c, "in literal BinData (expecting 'i')")
}
// Decodes a BinData literal stored in the underlying byte data into v.
func (d *decodeState) storeBinData(v reflect.Value) {
op := d.scanWhile(scanSkipSpace)
if op != scanBeginCtor {
d.error(fmt.Errorf("expected beginning of constructor"))
}
args, err := d.ctor("BinData", []reflect.Type{byteType, stringType})
if err != nil {
d.error(err)
}
switch kind := v.Kind(); kind {
case reflect.Interface:
arg0 := byte(args[0].Uint())
arg1 := args[1].String()
v.Set(reflect.ValueOf(BinData{arg0, arg1}))
default:
d.error(fmt.Errorf("cannot store %v value into %v type", binDataType, kind))
}
}
// Returns a BinData literal from the underlying byte data.
func (d *decodeState) getBinData() interface{} {
op := d.scanWhile(scanSkipSpace)
if op != scanBeginCtor {
d.error(fmt.Errorf("expected beginning of constructor"))
}
// Prevent d.convertNumber() from parsing the argument as a float64.
useNumber := d.useNumber
d.useNumber = true
args := d.ctorInterface()
if err := ctorNumArgsMismatch("BinData", 2, len(args)); err != nil {
d.error(err)
}
arg0, err := args[0].(Number).Uint8()
if err != nil {
d.error(fmt.Errorf("expected byte for first argument of BinData constructor"))
}
arg1, ok := args[1].(string)
if !ok {
d.error(fmt.Errorf("expected string for second argument of BinData constructor"))
}
d.useNumber = useNumber
return BinData{arg0, arg1}
}
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