From 90d76525c5cc2f3f4781351a1d99be839dfa2874 Mon Sep 17 00:00:00 2001
From: Neil Conway
Date: Sat, 3 Mar 2007 19:32:55 +0000
Subject: Add resetStringInfo(), which clears the content of a StringInfo, and
 fixup various places in the tree that were clearing a StringInfo by hand.
 Making this function a part of the API simplifies client code slightly, and
 avoids needlessly peeking inside the StringInfo interface.

---
 src/backend/lib/stringinfo.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'src/backend/lib/stringinfo.c')

diff --git a/src/backend/lib/stringinfo.c b/src/backend/lib/stringinfo.c
index 826212d0aad..b0854ddc43b 100644
--- a/src/backend/lib/stringinfo.c
+++ b/src/backend/lib/stringinfo.c
@@ -9,7 +9,7 @@
  * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	  $PostgreSQL: pgsql/src/backend/lib/stringinfo.c,v 1.44 2007/01/05 22:19:29 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/lib/stringinfo.c,v 1.45 2007/03/03 19:32:54 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -49,8 +49,20 @@ initStringInfo(StringInfo str)
 
 	str->data = (char *) palloc(size);
 	str->maxlen = size;
-	str->len = 0;
+	resetStringInfo(str);
+}
+
+/*
+ * resetStringInfo
+ *
+ * Reset the StringInfo: the data buffer remains valid, but its
+ * previous content, if any, is cleared.
+ */
+void
+resetStringInfo(StringInfo str)
+{
 	str->data[0] = '\0';
+	str->len = 0;
 	str->cursor = 0;
 }
 
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