forked from valyala/fastjson
/
equals.go
143 lines (117 loc) · 2.61 KB
/
equals.go
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package fastjson
import (
"fmt"
)
func Equals(a, b string) error {
return EqualsBytes([]byte(a), []byte(b))
}
func EqualsBytes(a, b []byte) (err error) {
va, err := ParseBytes(a)
if err != nil {
err = fmt.Errorf("init a error: %s", err)
return
}
vb, err := ParseBytes(b)
if err != nil {
err = fmt.Errorf("init b error: %s", err)
return
}
path := "$"
if va.Type() != TypeArray && va.Type() != TypeObject {
err = equals(path, va, vb)
if err != nil {
return
}
} else if va.Type() == TypeArray {
err = equalsArray(path, va, vb)
if err != nil {
return
}
} else {
err = equalsObject(path, va, vb)
if err != nil {
return
}
}
return
}
func equalsObject(path string, va, vb *Value) (err error) {
ob, err := vb.Object()
if err != nil {
err = compareError(path, fmt.Errorf("get b object error: %s", err))
return
}
oa, _ := va.Object()
defer func() {
e := recover()
if e != nil {
err = fmt.Errorf("%v", e)
}
}()
if oa.Len() != ob.Len() {
err = compareError(path, fmt.Errorf("object length: %d != %d", oa.Len(), ob.Len()))
return
}
oa.Visit(func(key []byte, v *Value) {
p := fmt.Sprintf("%s.%s", path, string(key))
obv := ob.Get(string(key))
if obv == nil {
panic(compareError(p, fmt.Errorf("b.Value is nil")))
}
if v.Type() == TypeObject {
err = equalsObject(p, v, obv)
if err != nil {
panic(err)
}
} else if v.Type() == TypeArray {
err = equalsArray(p, v, obv)
if err != nil {
panic(err)
}
} else {
err = equals(p, v, obv)
if err != nil {
panic(err)
}
}
})
return
}
func equals(path string, va, vb *Value) error {
if va.Type() == TypeArray || va.Type() == TypeObject {
return compareError(path, fmt.Errorf("internal error: sholud not use equals"))
}
if va.String() != vb.String() {
return compareError(path, fmt.Errorf("%s != %s", va, vb))
}
return nil
}
func equalsArray(path string, va, vb *Value) (err error) {
ab, err := vb.Array()
if err != nil {
err = compareError(path, fmt.Errorf("get b object error: %s", err))
return
}
aa, _ := va.Array()
if len(aa) != len(ab) {
err = compareError(path, fmt.Errorf("array length not match, aa: %d, ab: %d", len(aa), len(ab)))
return
}
for i, v := range aa {
p := fmt.Sprintf("%s.%d", path, i)
if v.Type() == TypeObject {
err = equalsObject(p, v, ab[i])
} else if v.Type() == TypeArray {
err = equalsArray(p, v, ab[i])
} else {
err = equals(p, v, ab[i])
}
if err != nil {
return
}
}
return
}
func compareError(path string, err error) error {
return fmt.Errorf("compare path: %s error: %s", path, err)
}