Add function rb_reg_onig_match

rb_reg_onig_match performs preparation, error handling, and cleanup for
matching a regex against a string. This reduces repetitive code and
removes the need for StringScanner to access internal data of regex.

1 files changed, 6 insertions, 2 deletions

diff --git a/regexec.c b/regexec.c
index b0f73e41d5..ba0e7c2cd2 100644
--- a/regexec.c
+++ b/regexec.c
@@ -888,12 +888,16 @@ onig_region_free(OnigRegion* r, int free_self)
     if (r->allocated > 0) {
       xfree(r->beg);
       xfree(r->end);
-      r->allocated = 0;
     }
 #ifdef USE_CAPTURE_HISTORY
     history_root_free(r);
 #endif
-    if (free_self) xfree(r);
+    if (free_self) {
+      xfree(r);
+    }
+    else {
+      memset(r, 0, sizeof(OnigRegion));
+    }
   }
 }