From e5a9c92a9f5d70d1beda4337d00b57f7d2bc7dca Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Sun, 6 Apr 2003 20:29:13 +0000
Subject: [PATCH] (CHECK_TOTAL_LENGTH): New macro.

---
 src/intervals.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/intervals.h b/src/intervals.h
index d2511ae565c..e29e7d3aa01 100644
--- a/src/intervals.h
+++ b/src/intervals.h
@@ -125,6 +125,10 @@ Boston, MA 02111-1307, USA.  */
    "next" value, and test the result to see if it's NULL_INTERVAL.  */
 #define INTERVAL_PARENT_OR_NULL(i) (INTERVAL_HAS_PARENT (i) ? INTERVAL_PARENT (i) : 0)
 
+/* Abort if interval I's size is negative.  */
+#define CHECK_TOTAL_LENGTH(i) \
+  if ((int) (i)->total_length < 0) abort (); else
+
 /* Reset this interval to its vanilla, or no-property state. */
 #define RESET_INTERVAL(i) \
 { \
-- 
2.11.4.GIT