X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=include%2Fyaz%2Fwrbuf.h;h=1d4f83b90868fbda4f721c28a408f8f67834400b;hp=e7629d063c52e3d32a373206719c3253abd7a9e4;hb=29644f5396a22ec0d51266011f57741adb2fd171;hpb=0d6f3ee9720647761ff74414a46828c0b9711ac0

diff --git a/include/yaz/wrbuf.h b/include/yaz/wrbuf.h
index e7629d0..1d4f83b 100644
--- a/include/yaz/wrbuf.h
+++ b/include/yaz/wrbuf.h
@@ -242,11 +242,20 @@ YAZ_EXPORT int wrbuf_grow(WRBUF b, size_t minsize);
 #define wrbuf_buf(b) ((b)->buf)
 
 /** \brief returns WRBUF content as C-string
-    \param b WRBUF
+    \param b WRBUF (may not be NULL)
     \returns C-string
 */
 YAZ_EXPORT const char *wrbuf_cstr(WRBUF b);
 
+/** \brief returns WRBUF content as C-string or NULL
+    \param b WRBUF
+    \returns C-string or NULL
+
+    This function returns NULL if either b is NULL or length of buffer is 0
+*/
+YAZ_EXPORT
+const char *wrbuf_cstr_null(WRBUF b);
+
 #define wrbuf_putc(b, c) \
     ((void) ((b)->pos >= (b)->size ? wrbuf_grow(b, 1) : 0),  \
     (b)->buf[(b)->pos++] = (c), 0)