--- a/libnnchat.h	Tue Nov 11 22:33:35 2008 +0200
+++ b/libnnchat.h	Tue Nov 11 23:57:49 2008 +0200
@@ -24,17 +24,42 @@
 #define SET_BUFSIZE     (4096)
 #define SET_ALLOC_SIZE	(128)
 
+typedef struct {
+	char **data;
+	size_t n, size;
+} ringbuf_t;
+
+typedef struct {
+	ssize_t pos, len, size;
+	char *data;
+} editbuf_t;
+
+
 int     openConnection(struct in_addr *addr, const int port);
 void    closeConnection(const int sock);
 BOOL    sendToSocket(const int sock, char *buf, const size_t bufLen);
 BOOL    sendUserMsg(const int sock, const char *user, const char *fmt, ...);
 
 
-char    *encodeStr1(const char *str);
-char    *decodeStr1(const char *str);
-char    *encodeStr2(const char *str);
-char    *decodeStr2(const char *str);
-char    *stripXMLTags(const char *str);
+char *  encodeStr1(const char *str);
+char *  decodeStr1(const char *str);
+char *  encodeStr2(const char *str);
+char *  decodeStr2(const char *str);
+char *  stripXMLTags(const char *str);
+
+
+ringbuf_t * newRingBuf(const size_t size);
+void        freeRingBuf(ringbuf_t *buf);
+void        addRingBuf(ringbuf_t *buf, const char *str);
+
+int         writeBuf(editbuf_t *buf, ssize_t pos, int ch);
+int         insertBuf(editbuf_t *buf, ssize_t pos, int ch);
+int         deleteBuf(editbuf_t *buf, ssize_t pos);
+void        clearBuf(editbuf_t *buf);
+editbuf_t * newBuf(ssize_t n);
+void        freeBuf(editbuf_t *buf);
+editbuf_t * copyBuf(editbuf_t *src);
+void        setBufPos(editbuf_t *buf, ssize_t pos);
 
 
 #endif