Add Tokenizer.concatenate_remaining_identifiers()

Replace identical code duplicated in a number of rdatatype
implementations that concatenated all of the remaining tokens in order
to decode them.

1 files changed, 19 insertions, 0 deletions

diff --git a/dns/tokenizer.py b/dns/tokenizer.py
index cb5ebd3..3e5d2ba 100644
--- a/dns/tokenizer.py
+++ b/dns/tokenizer.py
@@ -559,6 +559,25 @@ class Tokenizer:
             raise dns.exception.SyntaxError('expecting an identifier')
         return token.value
 
+    def concatenate_remaining_identifiers(self):
+        """Read the remaining tokens on the line, which should be identifiers.
+
+        Raises dns.exception.SyntaxError if a token is seen that is not an
+        identifier.
+
+        Returns a string containing a concatenation of the remaining
+        identifiers.
+        """
+        s = ""
+        while True:
+            token = self.get().unescape()
+            if token.is_eol_or_eof():
+                break
+            if not token.is_identifier():
+                raise dns.exception.SyntaxError
+            s += token.value
+        return s
+
     def as_name(self, token, origin=None, relativize=False, relativize_to=None):
         """Try to interpret the token as a DNS name.