From: Eric S. Raymond <esr@snark.thyrsus.com>
Date: Fri, 23 Apr 1993 03:06:10 +0000 (+0000)
Subject: (BUF_NARROWED, NARROWED): New macros to test whether a region
X-Git-Tag: archive/raspbian/1%29.2+1-2+rpi1^2~5^2~96496
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/www.github.com/%22bookmarks:///%22http:/www.example.com/cgi/%22https:/www.github.com/%22bookmarks:/?a=commitdiff_plain;h=e12f351912eb07a6cd49d5faf9ae3d90ba0c8d47;p=emacs.git

(BUF_NARROWED, NARROWED): New macros to test whether a region
restriction has narrowed the buffer.
---

diff --git a/src/buffer.h b/src/buffer.h
index 5c09f30c40b..34d92fd61c7 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -53,6 +53,9 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 /* Character position of end of buffer.  */ 
 #define Z (current_buffer->text.z)
 
+/* Is the current buffer narrowed? */
+#define NARROWED	((BEGV != BEG) || (ZV != Z))
+
 /* Modification count.  */
 #define MODIFF (current_buffer->text.modiff)
 
@@ -98,6 +101,10 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 /* Character position of end of buffer.  */ 
 #define BUF_Z(buf) ((buf)->text.z)
 
+/* Is this buffer narrowed? */
+#define BUF_NARROWED(buf) ((BUF_BEGV(buf) != BUF_BEG(buf)) \
+			   || (BUF_ZV(buf) != BUF_Z(buf)))
+
 /* Modification count.  */
 #define BUF_MODIFF(buf) ((buf)->text.modiff)