add tests for rebasing root

diff --git a/kwset.c b/kwset.c
index 956ae729501ed09b947eb33e161551beed2a1d95..5800999b4c16cd8f5eeb2301f72c33ec62c5ea71 100644 (file)
--- a/kwset.c
+++ b/kwset.c
@@ -26,7 +26,7 @@
    The author may be reached (Email) at the address mike@ai.mit.edu,
    or (US mail) as Mike Haertel c/o Free Software Foundation. */
 
-/* The algorithm implemented by these routines bears a startling resemblence
+/* The algorithm implemented by these routines bears a startling resemblance
    to one discovered by Beate Commentz-Walter, although it is not identical.
    See "A String Matching Algorithm Fast on the Average," Technical Report,
    IBM-Germany, Scientific Center Heidelberg, Tiergartenstrasse 15, D-6900
@@ -435,7 +435,7 @@ kwsprep (kwset_t kws)
          /* Update the delta table for the descendents of this node. */
          treedelta(curr->links, curr->depth, delta);
 
-         /* Compute the failure function for the decendents of this node. */
+         /* Compute the failure function for the descendants of this node. */
          treefails(curr->links, curr->fail, kwset->trie);
 
          /* Update the shifts at each node in the current node's chain
@@ -674,7 +674,7 @@ cwexec (kwset_t kws, char const *text, size_t len, struct kwsmatch *kwsmatch)
      copy of the preceding main search loops. */
   if (lim - mch > kwset->maxd)
     lim = mch + kwset->maxd;
-  lmch = 0;
+  lmch = NULL;
   d = 1;
   while (lim - end >= d)
     {