Fix slow study when much mutual recursion.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1547 2f5784b3-3f2a-0410-8824-cb99058d5e15

1 files changed, 7 insertions, 0 deletions

diff --git a/pcre_internal.h b/pcre_internal.h
index 1c5f4ce..871520e 100644
--- a/pcre_internal.h
+++ b/pcre_internal.h
@@ -2460,6 +2460,13 @@ typedef struct branch_chain {
   pcre_uchar *current_branch;
 } branch_chain;
 
+/* Structure for mutual recursion detection. */
+
+typedef struct recurse_check {
+  struct recurse_check *prev;
+  const pcre_uchar *group;
+} recurse_check;
+
 /* Structure for items in a linked list that represents an explicit recursive
 call within the pattern; used by pcre_exec(). */