Fix upb to escape DefinitelyNeedsEscape (like " and ') for bytes field

PiperOrigin-RevId: 740056596

Author: anandolee

python/google/protobuf/internal/text_format_test.py

@@ -609,6 +609,14 @@ def testPrintUnknownFieldsEmbeddedMessageInBytes(self, message_module):
                                                  print_unknown_fields=True,
                                                  as_one_line=True))
 
+  def testBytestDoubleQuotes(self, message_module):
+    msg = message_module.TestAllTypes(optional_bytes=b'"')
+    self.assertEqual(str(msg), 'optional_bytes: "\\""\n')
+
+  def testBytesSingleQuote(self, message_module):
+    msg = message_module.TestAllTypes(optional_bytes=b"'")
+    self.assertEqual(str(msg), 'optional_bytes: "\\\'"\n')
+
 
 @parameterized.parameters(unittest_pb2, unittest_proto3_arena_pb2)
 class TextFormatMessageToTextBytesTests(TextFormatBase):

upb/text/internal/encode.h

@@ -207,7 +207,8 @@ UPB_INLINE void UPB_PRIVATE(_upb_TextEncode_Bytes)(txtenc* e,
   UPB_PRIVATE(_upb_TextEncode_PutStr)(e, "\"");
   for (; ptr < end; ptr++) {
     unsigned char uc = *ptr;
-    if (UPB_PRIVATE(_upb_AsciiIsPrint)(uc)) {
+    if (UPB_PRIVATE(_upb_AsciiIsPrint)(uc) &&
+        !UPB_PRIVATE(_upb_DefinitelyNeedsEscape)(uc)) {
       UPB_PRIVATE(_upb_TextEncode_PutBytes)(e, ptr, 1);
     } else {
       UPB_PRIVATE(_upb_TextEncode_Escaped)(e, uc);