Small improvement for regexp maybe_long criteria.

3 files changed, 8 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 84491dcc..f5bc0822 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2020-10-11         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* re.c (make_regexp): Add {} to characters that cause rp->maybe_long
+	to be true.
+	* io.c (rsrescan): Update comment for step 4.
+
 2020-09-21         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* awk.h (enum redirect_flags): Add RED_NONE.
diff --git a/io.c b/io.c
index 1fb95873..2714398e 100644
--- a/io.c
+++ b/io.c
@@ -3753,7 +3753,7 @@ again:
          * "abc" into the front of the next record. Ooops.
          *
          * The re->maybe_long member is true if the
-         * regex contains one of: + * ? |.  This is a very
+         * regex contains one of: + * ? | { }.  This is a very
          * simple heuristic, but in combination with the
          * "end of match within a few bytes of end of buffer"
          * check, should keep things reasonable.
diff --git a/re.c b/re.c
index a23e7f6c..fb28c563 100644
--- a/re.c
+++ b/re.c
@@ -282,7 +282,7 @@ make_regexp(const char *s, size_t len, bool ignorecase, bool dfa, bool canfatal)
 	}
 
 	for (i = len - 1; i >= 0; i--) {
-		if (strchr("*+|?", buf[i]) != NULL) {
+		if (strchr("*+|?{}", buf[i]) != NULL) {
 			rp->maybe_long = true;
 			break;
 		}