diff --git a/qse/include/qse/awk/Awk.hpp b/qse/include/qse/awk/Awk.hpp
index 8655b39e..d5e57bd7 100644
--- a/qse/include/qse/awk/Awk.hpp
+++ b/qse/include/qse/awk/Awk.hpp
@@ -1,5 +1,5 @@
 /*
- * $Id: Awk.hpp 249 2009-08-07 13:35:24Z hyunghwan.chung $
+ * $Id: Awk.hpp 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -275,17 +275,15 @@ public:
 		 * The Awk::Source::Data class is used to deliver information
 		 * needed for source script I/O. 
 		 */
-		class Data: protected qse_awk_sio_arg_t
+		class Data: protected sio_arg_t
 		{
 		public:
 			friend class Awk;
 
 		protected:
-			Data (Awk* awk, Mode mode): 
-				awk (awk), mode (mode)
+			Data (Awk* awk, Mode mode, sio_arg_t* arg): 
+				awk (awk), mode (mode), arg (arg)
 			{
-				this->name = QSE_NULL;
-				this->handle = QSE_NULL;
 			}
 
 		public:
@@ -296,17 +294,17 @@ public:
 
 			const char_t* getName() const
 			{
-				return this->name;
+				return arg->name;
 			}
 
 			const void* getHandle () const
 			{
-				return this->handle;
+				return arg->handle;
 			}
 
 			void  setHandle (void* handle)
 			{
-				this->handle = handle;
+				arg->handle = handle;
 			}
 
 			operator Awk* () const
@@ -322,6 +320,7 @@ public:
 		protected:
 			Awk* awk;
 			Mode  mode;
+			sio_arg_t* arg;
 		};
 
 		Source () {}
@@ -1090,9 +1089,6 @@ protected:
 
 	map_t* functionMap;
 
-	Source::Data sourceIn;
-	Source::Data sourceOut;
-
 	Source* sourceReader;
 	Source* sourceWriter;
 
diff --git a/qse/include/qse/awk/StdAwk.hpp b/qse/include/qse/awk/StdAwk.hpp
index 3fa921dc..7d5d8137 100644
--- a/qse/include/qse/awk/StdAwk.hpp
+++ b/qse/include/qse/awk/StdAwk.hpp
@@ -1,5 +1,5 @@
 /*
- * $Id: StdAwk.hpp 235 2009-07-15 10:43:31Z hyunghwan.chung $
+ * $Id: StdAwk.hpp 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -45,7 +45,10 @@ public:
 	class SourceFile: public Source 
 	{
 	public:
-		SourceFile (const char_t* name): name (name) {}
+		SourceFile (const char_t* name): name (name) 
+		{
+			dir.ptr = QSE_NULL; dir.len = 0; 
+		}
 
 		int open (Data& io);
 		int close (Data& io);
@@ -54,6 +57,7 @@ public:
 
 	protected:
 		const char_t* name;
+		qse_cstr_t dir;
 	};
 
 	class SourceString: public Source
diff --git a/qse/include/qse/awk/awk.h b/qse/include/qse/awk/awk.h
index 11b93190..b64b2859 100644
--- a/qse/include/qse/awk/awk.h
+++ b/qse/include/qse/awk/awk.h
@@ -1,5 +1,5 @@
 /*
- * $Id: awk.h 249 2009-08-07 13:35:24Z hyunghwan.chung $
+ * $Id: awk.h 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -271,12 +271,21 @@ enum qse_awk_sio_cmd_t
 };
 typedef enum qse_awk_sio_cmd_t qse_awk_sio_cmd_t;
 
+typedef struct qse_awk_sio_lxc_t qse_awk_sio_lxc_t;
+struct qse_awk_sio_lxc_t
+{
+	qse_cint_t        c;
+	qse_size_t        lin;
+	qse_size_t        col;
+	const qse_char_t* file;
+};
+
 struct qse_awk_sio_arg_t 
 {
 	const qse_char_t* name;   /**< [IN] name of I/O object */
 	void* handle;             /**< [OUT] I/O handle set by a handler */
 
-	/*--  from here down, internal use only --*/
+	/*-- from here down, internal use only --*/
 	struct
 	{
 		qse_char_t buf[1024];
@@ -287,6 +296,7 @@ struct qse_awk_sio_arg_t
 	qse_size_t lin;
 	qse_size_t col;
 
+	qse_awk_sio_lxc_t last;
 	struct qse_awk_sio_arg_t* next;
 };
 typedef struct qse_awk_sio_arg_t qse_awk_sio_arg_t;
diff --git a/qse/lib/awk/Awk.cpp b/qse/lib/awk/Awk.cpp
index 42482042..aa1d0d63 100644
--- a/qse/lib/awk/Awk.cpp
+++ b/qse/lib/awk/Awk.cpp
@@ -1,5 +1,5 @@
 /*
- * $Id: Awk.cpp 249 2009-08-07 13:35:24Z hyunghwan.chung $
+ * $Id: Awk.cpp 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -995,9 +995,7 @@ int Awk::Run::getGlobal (int id, Value& g) const
 // Awk
 //////////////////////////////////////////////////////////////////
 
-Awk::Awk () : awk (QSE_NULL), functionMap (QSE_NULL),
-	sourceIn (this, Source::READ), sourceOut (this, Source::WRITE),
-	runctx (this)
+Awk::Awk () : awk (QSE_NULL), functionMap (QSE_NULL), runctx (this)
 
 {
 	errinf.num = (errnum_t)ERR_NOERR;
@@ -1608,16 +1606,16 @@ Awk::ssize_t Awk::readSource (
 	char_t* data, size_t count)
 {
 	xtn_t* xtn = (xtn_t*) QSE_XTN (awk);
+	Source::Data sdat (xtn->awk, Source::READ, arg);
 
 	switch (cmd)
 	{
 		case QSE_AWK_SIO_OPEN:
-			xtn->awk->sourceIn.name = arg->name;
-			return xtn->awk->sourceReader->open (xtn->awk->sourceIn);
+			return xtn->awk->sourceReader->open (sdat);
 		case QSE_AWK_SIO_CLOSE:
-			return xtn->awk->sourceReader->close (xtn->awk->sourceIn);
+			return xtn->awk->sourceReader->close (sdat);
 		case QSE_AWK_SIO_READ:
-			return xtn->awk->sourceReader->read (xtn->awk->sourceIn, data, count);
+			return xtn->awk->sourceReader->read (sdat, data, count);
 		default:
 			return -1;
 	}
@@ -1628,16 +1626,16 @@ Awk::ssize_t Awk::writeSource (
 	char_t* data, size_t count)
 {
 	xtn_t* xtn = (xtn_t*) QSE_XTN (awk);
+	Source::Data sdat (xtn->awk, Source::WRITE, arg);
 
 	switch (cmd)
 	{
 		case QSE_AWK_SIO_OPEN:
-			xtn->awk->sourceOut.name = arg->name;
-			return xtn->awk->sourceWriter->open (xtn->awk->sourceOut);
+			return xtn->awk->sourceWriter->open (sdat);
 		case QSE_AWK_SIO_CLOSE:
-			return xtn->awk->sourceWriter->close (xtn->awk->sourceOut);
+			return xtn->awk->sourceWriter->close (sdat);
 		case QSE_AWK_SIO_WRITE:
-			return xtn->awk->sourceWriter->write (xtn->awk->sourceOut, data, count);
+			return xtn->awk->sourceWriter->write (sdat, data, count);
 		default:
 			return -1;
 	}
diff --git a/qse/lib/awk/StdAwk.cpp b/qse/lib/awk/StdAwk.cpp
index e6690b06..965d9a9d 100644
--- a/qse/lib/awk/StdAwk.cpp
+++ b/qse/lib/awk/StdAwk.cpp
@@ -1,5 +1,5 @@
 /*
- * $Id: StdAwk.cpp 241 2009-07-22 12:47:13Z hyunghwan.chung $
+ * $Id: StdAwk.cpp 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -778,22 +778,78 @@ int StdAwk::vsprintf (
 int StdAwk::SourceFile::open (Data& io)
 {
 	qse_sio_t* sio;
+	const qse_char_t* ioname = io.getName();
 
-	if (name[0] == QSE_T('-') &&
-	    name[1] == QSE_T('\0'))
+	if (ioname == QSE_NULL)
 	{
-		sio = (io.getMode() == READ)? qse_sio_in: qse_sio_out;
+		if (name[0] == QSE_T('-') && name[1] == QSE_T('\0'))
+		{
+			sio = (io.getMode() == READ)? qse_sio_in: qse_sio_out;
+		}
+		else
+		{
+			const qse_char_t* base;
+
+			sio = qse_sio_open (
+				((awk_t*)io)->mmgr,
+				0,
+				name,
+				(io.getMode() == READ? 
+					QSE_SIO_READ: 
+					(QSE_SIO_WRITE|QSE_SIO_CREATE|QSE_SIO_TRUNCATE))
+			);
+			if (sio == QSE_NULL) return -1;
+
+			base = qse_awk_basename ((awk_t*)io, name);
+			if (base != name)
+			{
+				dir.ptr = name;
+				dir.len = base - name;
+			}
+		}
 	}
 	else
 	{
+		const char_t* file = name;
+		char_t fbuf[64];
+		char_t* dbuf = QSE_NULL;
+	
+		if (dir.len > 0)
+		{
+			size_t tmplen, totlen;
+			
+			totlen = qse_strlen(ioname) + dir.len;
+			if (totlen >= QSE_COUNTOF(fbuf))
+			{
+				dbuf = (qse_char_t*) QSE_MMGR_ALLOC (
+					((awk_t*)io)->mmgr,
+					QSE_SIZEOF(qse_char_t) * (totlen + 1)
+				);
+				if (dbuf == QSE_NULL)
+				{
+					((Awk*)io)->setError (ERR_NOMEM);
+					return -1;
+				}
+
+				file = dbuf;
+			}
+			else file = fbuf;
+
+			tmplen = qse_strncpy (
+				(char_t*)file, dir.ptr, dir.len);
+			qse_strcpy ((char_t*)file + tmplen, ioname);
+		}
+
 		sio = qse_sio_open (
 			((awk_t*)io)->mmgr,
 			0,
-			name,
+			file,
 			(io.getMode() == READ? 
 				QSE_SIO_READ: 
 				(QSE_SIO_WRITE|QSE_SIO_CREATE|QSE_SIO_TRUNCATE))
 		);
+
+		if (dbuf != QSE_NULL) QSE_MMGR_FREE (((awk_t*)io)->mmgr, dbuf);
 		if (sio == QSE_NULL) return -1;
 	}
 
@@ -827,27 +883,67 @@ StdAwk::ssize_t StdAwk::SourceFile::write (Data& io, char_t* buf, size_t len)
 
 int StdAwk::SourceString::open (Data& io)
 {
-	/* SourceString does not support writing */
-	if (io.getMode() == WRITE) return -1;
-	ptr = str;
+	qse_sio_t* sio;
+	const char_t* ioname = io.getName();
+
+	if (ioname == QSE_NULL)
+	{
+		/* SourceString does not support writing */
+		if (io.getMode() == WRITE) return -1;
+		ptr = str;
+	}
+	else
+	{
+		/* open an included file */
+		sio = qse_sio_open (
+			((awk_t*)io)->mmgr,
+			0,
+			ioname,
+			(io.getMode() == READ? 
+				QSE_SIO_READ: 
+				(QSE_SIO_WRITE|QSE_SIO_CREATE|QSE_SIO_TRUNCATE))
+		);
+		if (sio == QSE_NULL) return -1;
+		io.setHandle (sio);
+	}
+
 	return 1;
 }
 
 int StdAwk::SourceString::close (Data& io)
 {
+	if (io.getName() != QSE_NULL)
+		qse_sio_close ((qse_sio_t*)io.getHandle());
+
 	return 0;
 }
 
 StdAwk::ssize_t StdAwk::SourceString::read (Data& io, char_t* buf, size_t len)
 {
-	qse_size_t n = 0;
-	while (*ptr != QSE_T('\0') && n < len) buf[n++] = *ptr++;
-	return n;
+	if (io.getName() == QSE_NULL)
+	{
+		qse_size_t n = 0;
+		while (*ptr != QSE_T('\0') && n < len) buf[n++] = *ptr++;
+		return n;
+	}
+	else
+	{
+		return qse_sio_getsn ((qse_sio_t*)io.getHandle(), buf, len);
+	}
 }
 
 StdAwk::ssize_t StdAwk::SourceString::write (Data& io, char_t* buf, size_t len)
 {
-	return -1;
+	if (io.getName() == QSE_NULL)
+	{
+		return -1;
+	}
+	else
+	{
+		// in fact, this block will never be reached as
+		// there is no included file concept for deparsing 
+		return qse_sio_putsn ((qse_sio_t*)io.getHandle(), buf, len);
+	}
 }
 
 /////////////////////////////////
diff --git a/qse/lib/awk/awk.h b/qse/lib/awk/awk.h
index a9d989ed..e392fd92 100644
--- a/qse/lib/awk/awk.h
+++ b/qse/lib/awk/awk.h
@@ -1,5 +1,5 @@
 /*
- * $Id: awk.h 248 2009-08-06 08:27:14Z hyunghwan.chung $
+ * $Id: awk.h 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -106,15 +106,6 @@ struct qse_awk_token_t
 	qse_size_t        col;
 };
 
-typedef struct qse_awk_lxc_t qse_awk_lxc_t;
-struct qse_awk_lxc_t 
-{
-	qse_cint_t        c;
-	qse_size_t        lin;
-	qse_size_t        col;
-	const qse_char_t* file;
-};
-
 struct qse_awk_t
 {
 	QSE_DEFINE_COMMON_FIELDS (sed)
@@ -186,10 +177,10 @@ struct qse_awk_t
 		qse_awk_sio_fun_t inf;
 		qse_awk_sio_fun_t outf;
 
-		qse_awk_lxc_t last; 
+		qse_awk_sio_lxc_t last; 
 
 		qse_size_t nungots;
-		qse_awk_lxc_t ungot[5];
+		qse_awk_sio_lxc_t ungot[5];
 
 		qse_awk_sio_arg_t arg; /* for the top level source */
 		qse_awk_sio_arg_t* inp; /* current input */
diff --git a/qse/lib/awk/misc.c b/qse/lib/awk/misc.c
index 44e00ab8..2d4379d1 100644
--- a/qse/lib/awk/misc.c
+++ b/qse/lib/awk/misc.c
@@ -1,5 +1,5 @@
 /*
- * $Id: misc.c 237 2009-07-16 12:43:47Z hyunghwan.chung $
+ * $Id: misc.c 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -999,3 +999,17 @@ void qse_awk_rtx_free (qse_awk_rtx_t* rtx, void* ptr)
 	qse_awk_free (rtx->awk, ptr);
 }
 
+const qse_char_t* qse_awk_basename (qse_awk_t* awk, const qse_char_t* path)
+{
+	const qse_char_t* p, * last = QSE_NULL;
+
+	for (p = path; *p != QSE_T('\0'); p++)
+	{
+		if (*p == QSE_T('/')) last = p;
+#ifdef _WIN32
+		else if (*p == QSE_T('\\')) last = p;
+#endif
+	}
+
+	return (last == QSE_NULL)? path: (last + 1);
+}
diff --git a/qse/lib/awk/misc.h b/qse/lib/awk/misc.h
index 314351c8..960a2035 100644
--- a/qse/lib/awk/misc.h
+++ b/qse/lib/awk/misc.h
@@ -1,5 +1,5 @@
 /*
- * $Id: misc.h 171 2009-06-01 09:34:34Z hyunghwan.chung $
+ * $Id: misc.h 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -67,6 +67,11 @@ int qse_awk_matchrex (
 	qse_cstr_t* match, qse_awk_errnum_t* errnum
 );
 
+const qse_char_t* qse_awk_basename (
+	qse_awk_t* awk, 
+	const qse_char_t* path
+);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/qse/lib/awk/parse.c b/qse/lib/awk/parse.c
index 127778cb..ba5df580 100644
--- a/qse/lib/awk/parse.c
+++ b/qse/lib/awk/parse.c
@@ -1,5 +1,5 @@
 /*
- * $Id: parse.c 248 2009-08-06 08:27:14Z hyunghwan.chung $
+ * $Id: parse.c 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -398,11 +398,7 @@ static int get_char (qse_awk_t* awk)
 	if (awk->sio.nungots > 0) 
 	{
 		/* there are something in the unget buffer */
-		QSE_MEMCPY (
-			&awk->sio.last,
-			&awk->sio.ungot[--awk->sio.nungots], 
-			QSE_SIZEOF(awk->sio.last)
-		);
+		awk->sio.last = awk->sio.ungot[--awk->sio.nungots];
 		return 0;
 	}
 
@@ -433,31 +429,28 @@ static int get_char (qse_awk_t* awk)
 		awk->sio.inp->b.len = n;	
 	}
 
-	awk->sio.last.c = awk->sio.inp->b.buf[awk->sio.inp->b.pos++];
-	awk->sio.last.lin = awk->sio.inp->lin;
-	awk->sio.last.col = awk->sio.inp->col;
-	awk->sio.last.file = awk->sio.inp->name;
+	awk->sio.inp->last.c = awk->sio.inp->b.buf[awk->sio.inp->b.pos++];
+	awk->sio.inp->last.lin = awk->sio.inp->lin;
+	awk->sio.inp->last.col = awk->sio.inp->col;
+	awk->sio.inp->last.file = awk->sio.inp->name;
 
-	if (awk->sio.last.c == QSE_T('\n'))
+	if (awk->sio.inp->last.c == QSE_T('\n'))
 	{
 		awk->sio.inp->lin++;
 		awk->sio.inp->col = 1;
 	}
 	else awk->sio.inp->col++;
 
+	awk->sio.last = awk->sio.inp->last;
 	return 0;
 }
 
-static void unget_char (qse_awk_t* awk, const qse_awk_lxc_t* c)
+static void unget_char (qse_awk_t* awk, const qse_awk_sio_lxc_t* c)
 {
 	/* Make sure that the unget buffer is large enough */
 	QSE_ASSERTX (awk->sio.nungots < QSE_COUNTOF(awk->sio.ungot), 
 		"Make sure that you have increased the size of sio.ungot large enough");
-
-	QSE_MEMCPY (
-		&awk->sio.ungot[awk->sio.nungots++], 
-		c, QSE_SIZEOF(*c)
-	);
+	awk->sio.ungot[awk->sio.nungots++] = *c;
 }
 
 const qse_char_t* qse_awk_getgblname (
@@ -762,8 +755,8 @@ static int end_include (qse_awk_t* awk)
 static qse_awk_t* parse_progunit (qse_awk_t* awk)
 {
 	/*
+	@include "xxxx"
 	global xxx, xxxx;
-	include "xxxx";
 	BEGIN { action }
 	END { action }
 	pattern { action }
@@ -5132,16 +5125,16 @@ static int skip_spaces (qse_awk_t* awk)
 
 			if (c == QSE_T('\\'))
 			{
-				qse_awk_lxc_t bs;
-				qse_awk_lxc_t cr;
+				qse_awk_sio_lxc_t bs;
+				qse_awk_sio_lxc_t cr;
 				int hascr = 0;
 
-				QSE_MEMCPY (&bs, &awk->sio.last, QSE_SIZEOF(bs));
+				bs = awk->sio.last;
 				GET_CHAR_TO (awk, c);
 				if (c == QSE_T('\r')) 
 				{
 					hascr = 1;
-					QSE_MEMCPY (&cr, &awk->sio.last, QSE_SIZEOF(cr));
+					cr = awk->sio.last;
 					GET_CHAR_TO (awk, c);
 				}
 
@@ -5157,7 +5150,7 @@ static int skip_spaces (qse_awk_t* awk)
 					/* push CR if any */
 					if (hascr) unget_char (awk, &cr);
 					/* restore the orginal backslash */
-					QSE_MEMCPY (&awk->sio.last, &bs, QSE_SIZEOF(bs));
+					awk->sio.last = bs;
 				}
 			}
 
@@ -5176,7 +5169,7 @@ static int skip_spaces (qse_awk_t* awk)
 static int skip_comment (qse_awk_t* awk)
 {
 	qse_cint_t c = awk->sio.last.c;
-	qse_awk_lxc_t lc;
+	qse_awk_sio_lxc_t lc;
 
 	if (c == QSE_T('#'))
 	{
@@ -5192,7 +5185,7 @@ static int skip_comment (qse_awk_t* awk)
 	if (c != QSE_T('/')) return 0; /* not a comment */
 
 	/* save the last character */
-	QSE_MEMCPY (&lc, &awk->sio.last, QSE_SIZEOF(lc));
+	lc = awk->sio.last;
 	/* read a new character */
 	GET_CHAR_TO (awk, c);
 
@@ -5232,7 +5225,7 @@ static int skip_comment (qse_awk_t* awk)
 	/* unget '*' */
 	unget_char (awk, &awk->sio.last);
 	/* restore the previous state */
-	QSE_MEMCPY (&awk->sio.last, &lc, QSE_SIZEOF(lc));
+	awk->sio.last = lc;
 
 	return 0;
 }
@@ -5359,7 +5352,11 @@ retry:
 	{
 		n = end_include (awk);
 		if (n <= -1) return -1;
-		if (n >= 1) goto retry;
+		if (n >= 1) 
+		{
+			awk->sio.last = awk->sio.inp->last;
+			goto retry;
+		}
 
 		ADD_TOKEN_STR (awk, token, QSE_T("<EOF>"), 5);
 		SET_TOKEN_TYPE (awk, token, TOKEN_EOF);
@@ -5377,9 +5374,9 @@ retry:
 	}
 	else if (c == QSE_T('.'))
 	{
-		qse_awk_lxc_t lc;
+		qse_awk_sio_lxc_t lc;
 
-		QSE_MEMCPY (&lc, &awk->sio.last, QSE_SIZEOF(lc));
+		lc = awk->sio.last;
 		GET_CHAR_TO (awk, c);
 
 		if (!(awk->option & QSE_AWK_EXPLICIT) && 
@@ -5387,7 +5384,7 @@ retry:
 		{
 			/* for a token such as .123 */
 			unget_char (awk, &awk->sio.last);	
-			QSE_MEMCPY (&awk->sio.last, &lc, QSE_SIZEOF(lc));
+			awk->sio.last = lc;
 			if (get_number (awk, token) <= -1) return -1;
 
 		}
diff --git a/qse/lib/awk/std.c b/qse/lib/awk/std.c
index d96863e0..19d7424f 100644
--- a/qse/lib/awk/std.c
+++ b/qse/lib/awk/std.c
@@ -1,5 +1,5 @@
 /*
- * $Id: std.c 247 2009-07-31 13:01:04Z hyunghwan.chung $
+ * $Id: std.c 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -45,6 +45,7 @@ typedef struct xtn_t
 					const qse_char_t* end;	
 				} cpl;
 			} u;
+			qse_cstr_t dir;
 			qse_sio_t* handle; /* the handle to an open file */
 		} in;
 
@@ -173,6 +174,8 @@ static qse_ssize_t sf_in_open (
 				}
 				else
 				{
+					const qse_char_t* base;
+
 					xtn->s.in.handle = qse_sio_open (
 						awk->mmgr,
 						0,
@@ -190,6 +193,13 @@ static qse_ssize_t sf_in_open (
 						);
 						return -1;
 					}
+
+					base = qse_awk_basename (awk, xtn->s.in.u.file);
+					if (base != xtn->s.in.u.file)
+					{
+						xtn->s.in.dir.ptr = xtn->s.in.u.file;
+						xtn->s.in.dir.len = base - xtn->s.in.u.file;
+					}
 				}
 				return 1;
 
@@ -208,11 +218,45 @@ static qse_ssize_t sf_in_open (
 	}
 	else
 	{
-/* TODO: standard include path */
+		const qse_char_t* file = arg->name;
+		qse_char_t fbuf[64];
+		qse_char_t* dbuf = QSE_NULL;
+	
+		if (xtn->s.in.dir.len > 0)
+		{
+			qse_size_t tmplen, totlen;
+			
+			totlen = qse_strlen(arg->name) + xtn->s.in.dir.len;
+			if (totlen >= QSE_COUNTOF(fbuf))
+			{
+				dbuf = QSE_MMGR_ALLOC (
+					awk->mmgr,
+					QSE_SIZEOF(qse_char_t) * (totlen + 1)
+				);
+				if (dbuf == QSE_NULL)
+				{
+					qse_awk_seterrnum (awk, QSE_AWK_ENOMEM);
+					return -1;
+				}
+
+				file = dbuf;
+			}
+			else file = fbuf;
+
+			tmplen = qse_strncpy (
+				(qse_char_t*)file,
+				xtn->s.in.dir.ptr,
+				xtn->s.in.dir.len
+			);
+			qse_strcpy ((qse_char_t*)file + tmplen, arg->name);
+		}
+
 		arg->handle = qse_sio_open (
-			awk->mmgr, 0, arg->name, QSE_SIO_READ
+			awk->mmgr, 0, file, QSE_SIO_READ
 		);
-		if (arg->handle == QSE_NULL) 
+
+		if (dbuf != QSE_NULL) QSE_MMGR_FREE (awk->mmgr, dbuf);
+		if (arg->handle == QSE_NULL)
 		{
 			qse_cstr_t ea;
 			ea.ptr = arg->name;
diff --git a/qse/samples/awk/awk04.c b/qse/samples/awk/awk04.c
index 8c4c0d9a..600b4a8d 100644
--- a/qse/samples/awk/awk04.c
+++ b/qse/samples/awk/awk04.c
@@ -1,5 +1,5 @@
 /*
- * $Id: awk04.c 211 2009-06-24 09:50:10Z hyunghwan.chung $
+ * $Id: awk04.c 250 2009-08-10 03:29:59Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -33,7 +33,7 @@ int main ()
 	qse_size_t len;
 	qse_awk_val_t* v;
 	qse_awk_val_t* arg[2] = { QSE_NULL, QSE_NULL };
-	int ret, i;
+	int ret, i, opt;
 
 	/* create a main processor */
 	awk = qse_awk_openstd (0);
@@ -43,8 +43,14 @@ int main ()
 		ret = -1; goto oops;
 	}
 
+	opt = qse_awk_getoption(awk);
+
 	/* don't allow BEGIN, END, pattern-action blocks */
-	qse_awk_setoption (awk, qse_awk_getoption(awk) & ~QSE_AWK_PABLOCK);
+	opt &= ~QSE_AWK_PABLOCK;
+	/* enable ** */
+	opt |= QSE_AWK_EXTRAOPS;
+
+	qse_awk_setoption (awk, opt);
 
 	psin.type = QSE_AWK_PARSESTD_CP;
 	psin.u.cp = src;