diff --git a/ncurses/trace/visbuf.c b/ncurses/trace/visbuf.c
new file mode 100644
index 0000000..bf9fb14
--- /dev/null
+++ b/ncurses/trace/visbuf.c
@@ -0,0 +1,331 @@
+/****************************************************************************
+ * Copyright (c) 2001-2007,2008 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Thomas E. Dickey                        1996-on                 *
+ *     and: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ ****************************************************************************/
+
+/*
+ *	visbuf.c - Tracing/Debugging support routines
+ */
+
+#define NEED_NCURSES_CH_T
+#include <curses.priv.h>
+
+#include <tic.h>
+#include <ctype.h>
+
+MODULE_ID("$Id: visbuf.c,v 1.32 2008/08/04 23:07:39 tom Exp $")
+
+#define NormalLen(len) (size_t) (((size_t)(len) + 1) * 4)
+#define WideLen(len)   (size_t) (((size_t)(len) + 1) * 4 * MB_CUR_MAX)
+
+#ifdef TRACE
+static const char d_quote[] = StringOf(D_QUOTE);
+static const char l_brace[] = StringOf(L_BRACE);
+static const char r_brace[] = StringOf(R_BRACE);
+#endif
+
+static char *
+_nc_vischar(char *tp, unsigned c)
+{
+    if (c == '"' || c == '\\') {
+	*tp++ = '\\';
+	*tp++ = (char) c;
+    } else if (is7bits(c) && (isgraph(c) || c == ' ')) {
+	*tp++ = (char) c;
+    } else if (c == '\n') {
+	*tp++ = '\\';
+	*tp++ = 'n';
+    } else if (c == '\r') {
+	*tp++ = '\\';
+	*tp++ = 'r';
+    } else if (c == '\b') {
+	*tp++ = '\\';
+	*tp++ = 'b';
+    } else if (c == '\033') {
+	*tp++ = '\\';
+	*tp++ = 'e';
+    } else if (UChar(c) == 0x7f) {
+	*tp++ = '\\';
+	*tp++ = '^';
+	*tp++ = '?';
+    } else if (is7bits(c) && iscntrl(UChar(c))) {
+	*tp++ = '\\';
+	*tp++ = '^';
+	*tp++ = (char) ('@' + c);
+    } else {
+	sprintf(tp, "\\%03lo", (unsigned long) ChCharOf(c));
+	tp += strlen(tp);
+    }
+    *tp = 0;
+    return tp;
+}
+
+static const char *
+_nc_visbuf2n(int bufnum, const char *buf, int len)
+{
+    const char *vbuf;
+    char *tp;
+    int c;
+
+    if (buf == 0)
+	return ("(null)");
+    if (buf == CANCELLED_STRING)
+	return ("(cancelled)");
+
+    if (len < 0)
+	len = (int) strlen(buf);
+
+#ifdef TRACE
+    vbuf = tp = _nc_trace_buf(bufnum, NormalLen(len));
+#else
+    {
+	static char *mybuf[4];
+	mybuf[bufnum] = typeRealloc(char, NormalLen(len), mybuf[bufnum]);
+	vbuf = tp = mybuf[bufnum];
+    }
+#endif
+    if (tp != 0) {
+	*tp++ = D_QUOTE;
+	while ((--len >= 0) && (c = *buf++) != '\0') {
+	    tp = _nc_vischar(tp, UChar(c));
+	}
+	*tp++ = D_QUOTE;
+	*tp++ = '\0';
+    } else {
+	vbuf = ("(_nc_visbuf2n failed)");
+    }
+    return (vbuf);
+}
+
+NCURSES_EXPORT(const char *)
+_nc_visbuf2(int bufnum, const char *buf)
+{
+    return _nc_visbuf2n(bufnum, buf, -1);
+}
+
+NCURSES_EXPORT(const char *)
+_nc_visbuf(const char *buf)
+{
+    return _nc_visbuf2(0, buf);
+}
+
+NCURSES_EXPORT(const char *)
+_nc_visbufn(const char *buf, int len)
+{
+    return _nc_visbuf2n(0, buf, len);
+}
+
+#ifdef TRACE
+#if USE_WIDEC_SUPPORT
+
+#if defined(USE_TERMLIB)
+#define _nc_wchstrlen _my_wchstrlen
+static int
+_nc_wchstrlen(const cchar_t *s)
+{
+    int result = 0;
+    while (CharOf(s[result]) != L'\0') {
+	result++;
+    }
+    return result;
+}
+#endif
+
+static const char *
+_nc_viswbuf2n(int bufnum, const wchar_t *buf, int len)
+{
+    const char *vbuf;
+    char *tp;
+    wchar_t c;
+
+    if (buf == 0)
+	return ("(null)");
+
+    if (len < 0)
+	len = (int) wcslen(buf);
+
+#ifdef TRACE
+    vbuf = tp = _nc_trace_buf(bufnum, WideLen(len));
+#else
+    {
+	static char *mybuf[2];
+	mybuf[bufnum] = typeRealloc(char, WideLen(len), mybuf[bufnum]);
+	vbuf = tp = mybuf[bufnum];
+    }
+#endif
+    if (tp != 0) {
+	*tp++ = D_QUOTE;
+	while ((--len >= 0) && (c = *buf++) != '\0') {
+	    char temp[CCHARW_MAX + 80];
+	    int j = wctomb(temp, c), k;
+	    if (j <= 0) {
+		sprintf(temp, "\\u%08X", (unsigned) c);
+		j = (int) strlen(temp);
+	    }
+	    for (k = 0; k < j; ++k) {
+		tp = _nc_vischar(tp, UChar(temp[k]));
+	    }
+	}
+	*tp++ = D_QUOTE;
+	*tp++ = '\0';
+    } else {
+	vbuf = ("(_nc_viswbuf2n failed)");
+    }
+    return (vbuf);
+}
+
+NCURSES_EXPORT(const char *)
+_nc_viswbuf2(int bufnum, const wchar_t *buf)
+{
+    return _nc_viswbuf2n(bufnum, buf, -1);
+}
+
+NCURSES_EXPORT(const char *)
+_nc_viswbuf(const wchar_t *buf)
+{
+    return _nc_viswbuf2(0, buf);
+}
+
+NCURSES_EXPORT(const char *)
+_nc_viswbufn(const wchar_t *buf, int len)
+{
+    return _nc_viswbuf2n(0, buf, len);
+}
+
+/* this special case is used for wget_wstr() */
+NCURSES_EXPORT(const char *)
+_nc_viswibuf(const wint_t *buf)
+{
+    static wchar_t *mybuf;
+    static unsigned mylen;
+    unsigned n;
+
+    for (n = 0; buf[n] != 0; ++n) ;
+    if (mylen < ++n) {
+	mylen = n + 80;
+	if (mybuf != 0)
+	    mybuf = typeRealloc(wchar_t, mylen, mybuf);
+	else
+	    mybuf = typeMalloc(wchar_t, mylen);
+    }
+    for (n = 0; buf[n] != 0; ++n)
+	mybuf[n] = (wchar_t) buf[n];
+
+    return _nc_viswbuf2(0, mybuf);
+}
+#endif /* USE_WIDEC_SUPPORT */
+
+/* use these functions for displaying parts of a line within a window */
+NCURSES_EXPORT(const char *)
+_nc_viscbuf2(int bufnum, const NCURSES_CH_T * buf, int len)
+{
+    char *result = _nc_trace_buf(bufnum, BUFSIZ);
+    int first;
+    const char *found;
+
+    if (result != 0) {
+#if USE_WIDEC_SUPPORT
+	if (len < 0)
+	    len = _nc_wchstrlen(buf);
+#endif /* USE_WIDEC_SUPPORT */
+
+	/*
+	 * Display one or more strings followed by attributes.
+	 */
+	first = 0;
+	while (first < len) {
+	    attr_t attr = AttrOf(buf[first]);
+	    int last = len - 1;
+	    int j;
+
+	    for (j = first + 1; j < len; ++j) {
+		if (!SameAttrOf(buf[j], buf[first])) {
+		    last = j - 1;
+		    break;
+		}
+	    }
+
+	    result = _nc_trace_bufcat(bufnum, l_brace);
+	    result = _nc_trace_bufcat(bufnum, d_quote);
+	    for (j = first; j <= last; ++j) {
+		found = _nc_altcharset_name(attr, (chtype) CharOf(buf[j]));
+		if (found != 0) {
+		    result = _nc_trace_bufcat(bufnum, found);
+		    attr &= ~A_ALTCHARSET;
+		} else
+#if USE_WIDEC_SUPPORT
+		if (!isWidecExt(buf[j])) {
+		    PUTC_DATA;
+
+		    PUTC_INIT;
+		    for (PUTC_i = 0; PUTC_i < CCHARW_MAX; ++PUTC_i) {
+			int k;
+
+			PUTC_ch = buf[j].chars[PUTC_i];
+			if (PUTC_ch == L'\0')
+			    break;
+			PUTC_n = (int) wcrtomb(PUTC_buf, buf[j].chars[PUTC_i], &PUT_st);
+			if (PUTC_n <= 0)
+			    break;
+			for (k = 0; k < PUTC_n; k++) {
+			    char temp[80];
+			    _nc_vischar(temp, UChar(PUTC_buf[k]));
+			    result = _nc_trace_bufcat(bufnum, temp);
+			}
+		    }
+		}
+#else
+		{
+		    char temp[80];
+		    _nc_vischar(temp, UChar(buf[j]));
+		    result = _nc_trace_bufcat(bufnum, temp);
+		}
+#endif /* USE_WIDEC_SUPPORT */
+	    }
+	    result = _nc_trace_bufcat(bufnum, d_quote);
+	    if (attr != A_NORMAL) {
+		result = _nc_trace_bufcat(bufnum, " | ");
+		result = _nc_trace_bufcat(bufnum, _traceattr2(bufnum + 20, attr));
+	    }
+	    result = _nc_trace_bufcat(bufnum, r_brace);
+	    first = last + 1;
+	}
+    }
+    return result;
+}
+
+NCURSES_EXPORT(const char *)
+_nc_viscbuf(const NCURSES_CH_T * buf, int len)
+{
+    return _nc_viscbuf2(0, buf, len);
+}
+#endif /* TRACE */