1 files changed, 33 insertions, 0 deletions
diff --git a/vendor/github.com/bytedance/sonic/ast/decode.go b/vendor/github.com/bytedance/sonic/ast/decode.go
index 3e08bfcb2..c521fb5f0 100644
--- a/vendor/github.com/bytedance/sonic/ast/decode.go
+++ b/vendor/github.com/bytedance/sonic/ast/decode.go
@@ -583,3 +583,36 @@ func skipArray(src string, pos int) (ret int, start int) {
         pos++
     }
 }
+
+// DecodeString decodes a JSON string from pos and return golang string.
+//   - needEsc indicates if to unescaped escaping chars
+//   - hasEsc tells if the returned string has escaping chars
+//   - validStr enables validating UTF8 charset
+//
+func _DecodeString(src string, pos int, needEsc bool, validStr bool) (v string, ret int, hasEsc bool) {
+    p := NewParserObj(src)
+    p.p = pos
+    switch val := p.decodeValue(); val.Vt {
+    case types.V_STRING:
+        str := p.s[val.Iv : p.p-1]
+        if validStr && !validate_utf8(str) {
+           return "", -int(types.ERR_INVALID_UTF8), false
+        }
+        /* fast path: no escape sequence */
+        if val.Ep == -1 {
+            return str, p.p, false
+        } else if !needEsc {
+            return str, p.p, true
+        }
+        /* unquote the string */
+        out, err := unquote(str)
+        /* check for errors */
+        if err != 0 {
+            return "", -int(err), true
+        } else {
+            return out, p.p, true
+        }
+    default:
+        return "", -int(_ERR_UNSUPPORT_TYPE), false
+    }
+}