From 3eba413ef7e80467c7831731a8e35c733e447c47 Mon Sep 17 00:00:00 2001
From: Adam Dickmeiss <adam@indexdata.dk>
Date: Sun, 18 Mar 2007 12:59:56 +0000
Subject: [PATCH] Added wrbuf_cut_right which cuts WRBUF by a number of
 characters (chop right).

---
 include/yaz/wrbuf.h |   15 ++++++++++++++-
 src/wrbuf.c         |    9 ++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/include/yaz/wrbuf.h b/include/yaz/wrbuf.h
index f7eb963..2007567 100644
--- a/include/yaz/wrbuf.h
+++ b/include/yaz/wrbuf.h
@@ -24,7 +24,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-/* $Id: wrbuf.h,v 1.23 2007-01-06 16:05:24 adam Exp $ */
+/* $Id: wrbuf.h,v 1.24 2007-03-18 12:59:56 adam Exp $ */
 
 /**
  * \file wrbuf.h
@@ -39,6 +39,7 @@
 
 YAZ_BEGIN_CDECL
 
+/** \brief string buffer */
 typedef struct wrbuf
 {
     char *buf;
@@ -46,10 +47,19 @@ typedef struct wrbuf
     int size;
 } wrbuf, *WRBUF;
 
+/** \brief allocate / construct WRBUF */
 YAZ_EXPORT WRBUF wrbuf_alloc(void);
+
+/** \brief free WRBUF and possibly its buffer */
 YAZ_EXPORT void wrbuf_free(WRBUF b, int free_buf);
+
+/** \brief destroy WRBUF and its buffer */
 YAZ_EXPORT void wrbuf_destroy(WRBUF b);
+
+/** \brief empty WRBUF content */
 YAZ_EXPORT void wrbuf_rewind(WRBUF b);
+
+/** \brief grow WRBUF larger */
 YAZ_EXPORT int wrbuf_grow(WRBUF b, int minsize);
 YAZ_EXPORT int wrbuf_write(WRBUF b, const char *buf, int size);
 YAZ_EXPORT int wrbuf_xmlputs_n(WRBUF b, const char *cp, int size);
@@ -73,6 +83,9 @@ YAZ_EXPORT int wrbuf_iconv_putchar(WRBUF b, yaz_iconv_t cd, int ch);
 
 YAZ_EXPORT void wrbuf_chop_right(WRBUF b);
 
+/** \brief cut size of WRBUF */
+YAZ_EXPORT void wrbuf_cut_right(WRBUF b, size_t no_to_remove);
+
 #define wrbuf_len(b) ((b)->pos)
 #define wrbuf_buf(b) ((b)->buf)
 
diff --git a/src/wrbuf.c b/src/wrbuf.c
index e8e6434..973f080 100644
--- a/src/wrbuf.c
+++ b/src/wrbuf.c
@@ -2,7 +2,7 @@
  * Copyright (C) 1995-2007, Index Data ApS
  * See the file LICENSE for details.
  *
- * $Id: wrbuf.c,v 1.16 2007-02-23 10:15:01 adam Exp $
+ * $Id: wrbuf.c,v 1.17 2007-03-18 12:59:56 adam Exp $
  */
 
 /**
@@ -231,6 +231,13 @@ const char *wrbuf_cstr(WRBUF b)
     return b->buf;
 }
 
+void wrbuf_cut_right(WRBUF b, size_t no_to_remove)
+{
+    if (no_to_remove > b->pos)
+        no_to_remove = b->pos;
+    b->pos = b->pos - no_to_remove;
+}
+
 /*
  * Local variables:
  * c-basic-offset: 4
-- 
1.7.10.4