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// +build gofuzz
package diff
import (
"bytes"
"context"
"io"
"io/ioutil"
"github.com/pkg/diff/ctxt"
"github.com/pkg/diff/myers"
"github.com/pkg/diff/write"
)
func Fuzz(data []byte) int {
if len(data) < 2 {
return -1
}
sz := int(data[0])
data = data[1:]
nul := bytes.IndexByte(data, 0)
if nul == -1 {
nul = len(data) - 1
}
a := data[:nul]
b := data[nul:]
ab := &IndividualBytes{a: a, b: b}
s := myers.Diff(context.Background(), ab)
s = ctxt.Size(s, sz)
err := write.Unified(s, ioutil.Discard, ab)
if err != nil {
panic(err)
}
return 0
}
type IndividualBytes struct {
a, b []byte
}
func (ab *IndividualBytes) LenA() int { return len(ab.a) }
func (ab *IndividualBytes) LenB() int { return len(ab.b) }
func (ab *IndividualBytes) Equal(ai, bi int) bool { return ab.a[ai] == ab.b[bi] }
func (ab *IndividualBytes) WriteATo(w io.Writer, i int) (int, error) { return w.Write([]byte{ab.a[i]}) }
func (ab *IndividualBytes) WriteBTo(w io.Writer, i int) (int, error) { return w.Write([]byte{ab.b[i]}) }
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