* sexp.h (struct sexp_iterator): New field start.

* sexp.c (sexp_iterator_subexpr): New function.
(sexp_iterator_parse): Initialize ITERATOR->start.

Rev: src/nettle/sexp.c:1.11
Rev: src/nettle/sexp.h:1.8

1 files changed, 9 insertions, 1 deletions

diff --git a/sexp.h b/sexp.h
index 21e88eaf..72bbae9c 100644
--- a/sexp.h
+++ b/sexp.h
@@ -36,7 +36,9 @@ struct sexp_iterator
 {
   unsigned length;
   const uint8_t *buffer;
-  
+
+  /* Points at the start of the current sub expression. */
+  unsigned start;
   /* If type is SEXP_LIST, pos points at the start of the current
    * element. Otherwise, it points at the end. */
   unsigned pos;
@@ -75,6 +77,12 @@ sexp_iterator_enter_list(struct sexp_iterator *iterator);
 int
 sexp_iterator_exit_list(struct sexp_iterator *iterator);
 
+/* Gets start and length of the current subexpression. Implies
+ * sexp_iterator_next. */
+const uint8_t *
+sexp_iterator_subexpr(struct sexp_iterator *iterator,
+		      unsigned *length);
+
 
 /* Checks the type of the current expression, which should be a list
  *