diff --git a/qse/cmd/awk/awk.c b/qse/cmd/awk/awk.c
index ea88f397..cebb58fc 100644
--- a/qse/cmd/awk/awk.c
+++ b/qse/cmd/awk/awk.c
@@ -1,5 +1,5 @@
 /*
- * $Id: awk.c 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: awk.c 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -154,7 +154,7 @@ static qse_map_walk_t print_awk_value (
 	qse_char_t* str;
 	qse_size_t len;
 
-	str = qse_awk_rtx_valtostrdup (run, QSE_MAP_VPTR(pair), &len);
+	str = qse_awk_rtx_valtocpldup (run, QSE_MAP_VPTR(pair), &len);
 	if (str == QSE_NULL)
 	{
 		dprint (QSE_T("***OUT OF MEMORY***\n"));
@@ -209,7 +209,7 @@ static void on_run_exit (
 	}
 	else
 	{
-		str = qse_awk_rtx_valtostrdup (rtx, ret, &len);
+		str = qse_awk_rtx_valtocpldup (rtx, ret, &len);
 		if (str == QSE_NULL)
 		{
 			dprint (QSE_T("[RETURN] - ***OUT OF MEMORY***\n"));
diff --git a/qse/doc/robodoc.rc b/qse/doc/robodoc.rc
index 23d4fbd3..c43c7cca 100644
--- a/qse/doc/robodoc.rc
+++ b/qse/doc/robodoc.rc
@@ -46,13 +46,13 @@ accept files:
 	*.c
 	*.h
 headertypes:
-	o     "Overview"     robo_overview     10
-	d     "Definitions"  robo_definitions  6 
-	t     "Types"        robo_types        5 
-	e     "Enumerations" robo_enumerations 6 
-	s     "Structures"   robo_structures   5 
-	f     "Functions"    robo_functions    4
-	S     "Samples"      robo_samples      0
+	o     "Overview"         robo_overview     10
+	m     "Macros"           robo_macros       6
+	t     "Types"            robo_types        5 
+	e     "Enumerations"     robo_enumerations 6 
+	s     "Structures"       robo_structures   5 
+	f     "Functions"        robo_functions    4
+	S     "Sample Programs"  robo_samples      0
 options:
 	--cmode
 	--nopre
diff --git a/qse/include/qse/awk/awk.h b/qse/include/qse/awk/awk.h
index 1f51bd43..f12174a5 100644
--- a/qse/include/qse/awk/awk.h
+++ b/qse/include/qse/awk/awk.h
@@ -1,5 +1,5 @@
 /*
- * $Id: awk.h 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: awk.h 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -49,6 +49,11 @@ typedef struct qse_awk_t     qse_awk_t;
 typedef struct qse_awk_rtx_t qse_awk_rtx_t; /* (R)untime con(T)e(X)t */
 /******/
 
+/****m* AWK/QSE_AWK_VAL_HDR
+ * NAME
+ *  QSE_AWK_VAL_HDR - define the common header of a value
+ * SYNOPSIS
+ */
 #if QSE_SIZEOF_INT == 2
 #	define QSE_AWK_VAL_HDR \
 		unsigned int type: 3; \
@@ -58,6 +63,7 @@ typedef struct qse_awk_rtx_t qse_awk_rtx_t; /* (R)untime con(T)e(X)t */
 		unsigned int type: 3; \
 		unsigned int ref: 29
 #endif
+/******/
 
 #define QSE_AWK_VAL_TYPE(x) ((x)->type)
 
@@ -708,20 +714,37 @@ enum qse_awk_val_ref_id_t
 	QSE_AWK_VAL_REF_POS
 };
 
-enum qse_awk_valtostr_type_t
+/****e* AWK/qse_awk_rtx_valtostr_type_t
+ * NAME
+ *  qse_awk_rtx_valtostr_type_t - define a value-to-string conversion type
+ * DESCRIPTION
+ *  The values defined are used to set the type field of the 
+ *  qse_awk_rtx_valtostr_out_t structure. The field should be one of the 
+ *  following values:
+ *  * QSE_AWK_RTX_VALTOSTR_CPL
+ *  * QSE_AWK_RTX_VALTOSTR_CPLDUP
+ *  * QSE_AWK_RTX_VALTOSTR_STRP
+ *  * QSE_AWK_RTX_VALTOSTR_STRPCAT
+ *  and it can optionally be ORed with QSE_AWK_RTX_VALTOSTR_PRINT.
+ * SYNOPSIS
+ */
+enum qse_awk_rtx_valtostr_type_t
 {
 	QSE_AWK_RTX_VALTOSTR_CPL       = 0x00,
 	QSE_AWK_RTX_VALTOSTR_CPLDUP    = 0x01,
 	QSE_AWK_RTX_VALTOSTR_STRP      = 0x02,
 	QSE_AWK_RTX_VALTOSTR_STRPCAT   = 0x03,
-
-	/* can be ORed with one of the values above */
 	QSE_AWK_RTX_VALTOSTR_PRINT     = 0x10
 };
+/******/
 
-/****s* AWK/qse_rtx_awk_valtostr_out_t
+/****s* AWK/qse_awk_rtx_valtostr_out_t
  * NAME
- *  qse_awk_rtx_valtostr_out_t - define a value-to-string converion output type
+ *  qse_awk_rtx_valtostr_out_t - define a output structure for value-to-string 
+ *  conversion
+ * DESCRIPTION
+ *  The qse_awk_rtx_valtostr() function converts a value to a string as 
+ *  indicated in a parameter of the qse_awk_rtx_valtostr_out_t type.
  * SYNOPSIS
  */
 struct qse_awk_rtx_valtostr_out_t
@@ -1570,15 +1593,30 @@ qse_bool_t qse_awk_rtx_isstaticval (
 	qse_awk_val_t* val
 );
 
+/****f* AWK/qse_awk_rtx_refupval
+ * NAME
+ *  qse_awk_rtx_refupval - increment a reference count
+ * SYNOPSIS
+ */
 void qse_awk_rtx_refupval (
 	qse_awk_rtx_t* rtx,
 	qse_awk_val_t* val
 );
+/******/
 
+/****f* AWK/qse_awk_rtx_refdownval
+ * NAME
+ *  qse_awk_rtx_refdownval - decrement a reference count
+ * DESCRIPTION
+ *  The qse_awk_rtx_refdownval() function decrements a reference count of
+ *  a value. It destroys the value if it has reached the count of 0.
+ * SYNOPSIS
+ */
 void qse_awk_rtx_refdownval (
 	qse_awk_rtx_t* rtx,
 	qse_awk_val_t* val
 );
+/******/
 
 void qse_awk_rtx_refdownval_nofree (
 	qse_awk_rtx_t* rtx,
@@ -1593,6 +1631,62 @@ qse_bool_t qse_awk_rtx_valtobool (
 /****f* AWK/qse_awk_rtx_valtostr
  * NAME
  *  qse_awk_rtx_valtostr - convert a value to a string
+ * DESCRIPTION
+ *  The qse_awk_rtx_valtostr() function convers a value val to a string as 
+ *  instructed in the parameter out. Before the call to the function, you 
+ *  should initialize a variable of the qse_awk_rtx_valtostr_out_t type.
+ *
+ *  The type field is one of the following qse_awk_rtx_valtostr_type_t values:
+ *  * QSE_AWK_RTX_VALTOSTR_CPL
+ *  * QSE_AWK_RTX_VALTOSTR_CPLDUP
+ *  * QSE_AWK_RTX_VALTOSTR_STRP
+ *  * QSE_AWK_RTX_VALTOSTR_STRPCAT
+ *  It can optionally be ORed with QSE_AWK_RTX_VALTOSTR_PRINT. The option
+ *  causes the function to use OFMT for real number conversion. Otherwise,
+ *  it uses CONVFMT.
+ *
+ *  You should initialize or free other fields before and after the call 
+ *  depending on the type field as shown in EXAMPLES.
+ *  
+ * RETURN
+ *  The qse_awk_rtx_valtostr() function returns the pointer to the string
+ *  converted on success, and QSE_NULL on failure.
+ *
+ * EXAMPLES
+ *  If you have a static buffer, use QSE_AWK_RTX_VALTOSTR_CPL.
+ *   qse_awk_rtx_valtostr_out_t out;
+ *   qse_char_t buf[100];
+ *   out.type = QSE_AWK_RTX_VALTOSTR_CPL;
+ *   out.u.cpl.ptr = buf;
+ *   out.u.cpl.len = QSE_COUNTOF(buf);
+ *   if (qse_awk_rtx_valtostr (rtx, v, &out) == QSE_NULL)  goto oops;
+ *   qse_printf (QSE_T("%.*s\n"), (int)out.u.cpl.len, out.u.cpl.ptr);
+ *
+ *  When unsure of the size of the string after conversion, you can use
+ *  QSE_AWK_RTX_VALTOSTR_CPLDUP. However, you should free the memory block
+ *  pointed to by the u.cpldup.ptr field after use.
+ *   qse_awk_rtx_valtostr_out_t out;
+ *   out.type = QSE_AWK_RTX_VALTOSTR_CPLDUP;
+ *   if (qse_awk_rtx_valtostr (rtx, v, &out) == QSE_NULL)  goto oops;
+ *   qse_printf (QSE_T("%.*s\n"), (int)out.u.cpldup.len, out.u.cpldup.ptr);
+ *   qse_awk_rtx_free (rtx, out.u.cpldup.ptr);
+ *
+ *  You may like to store the result in a dynamically resizable string.
+ *  Consider QSE_AWK_RTX_VALTOSTR_STRP.
+ *   qse_awk_rtx_valtostr_out_t out;
+ *   qse_str_t str;
+ *   qse_str_init (&str, qse_awk_rtx_getmmgr(rtx), 100);
+ *   out.type = QSE_AWK_RTX_VALTOSTR_STRP;
+ *   out.u.strp = str;
+ *   if (qse_awk_rtx_valtostr (rtx, v, &out) == QSE_NULL)  goto oops;
+ *   qse_printf (QSE_T("%.*s\n"), 
+ *   	(int)QSE_STR_LEN(out.u.strp), QSE_STR_PTR(out.u.strp));
+ *   qse_str_fini (&str);
+ * 
+ *  If you want to append the converted string to an existing dynamically 
+ *  resizable string, QSE_AWK_RTX_VALTOSTR_STRPCAT is the answer. The usage is
+ *  the same as QSE_AWK_RTX_VALTOSTR_STRP except that you have to use the 
+ *  u.strpcat field instead of the u.strp field.
  * SYNOPSIS
  */
 qse_char_t* qse_awk_rtx_valtostr (
@@ -1602,14 +1696,29 @@ qse_char_t* qse_awk_rtx_valtostr (
 );
 /******/
 
-/****f* AWK/qse_awk_rtx_valtostrdup
+/****f* AWK/qse_awk_rtx_valtocpldup
  * NAME
- *  qse_awk_rtx_valtostrdup - convert a value to a duplicated string 
+ *  qse_awk_rtx_valtocpldup - convert a value to a string 
+ * DESCRIPTION
+ *  The qse_awk_rtx_valtocpldup() function provides a shortcut to the 
+ *  qse_awk_rtx_valtostr() function with the QSE_AWK_RTX_VALTOSTR_CPLDUP type.
+ *  It returns the pointer to the string converted and stores the length
+ *  to memory pointed to by the parameter len. You should free the returned
+ *  memory block after use. 
+ * RETURN
+ *  It returns the pointer to the string converted on success, and 
+ *  QSE_NULL on failure.
+ * EXAMPLE
+ *  The example shows a simple usage of the function.
+ *   ptr = qse_awk_rtx_valtocpldup (rtx, v, &len);
+ *   if (str == QSE_NULL) goto oops;
+ *   qse_printf (QSE_T("%.*s\n"), (int)len, ptr);
+ *   qse_awk_rtx_free (rtx, ptr);
  * SYNOPSIS
  */
-qse_char_t* qse_awk_rtx_valtostrdup (
-        qse_awk_rtx_t* rtx,
-	qse_awk_val_t* v,
+qse_char_t* qse_awk_rtx_valtocpldup (
+	qse_awk_rtx_t* rtx,
+	qse_awk_val_t* val,
 	qse_size_t*    len
 );
 /******/
@@ -1639,9 +1748,9 @@ qse_char_t* qse_awk_rtx_valtostrdup (
  */
 int qse_awk_rtx_valtonum (
 	qse_awk_rtx_t* rtx,
-	qse_awk_val_t* v   /* the value to convert to a number */,
-	qse_long_t*    l   /* a pointer to a long number */, 
-	qse_real_t*    r   /* a pointer to a qse_real_t */
+	qse_awk_val_t* val,
+	qse_long_t*    l,
+	qse_real_t*    r
 );
 /******/
 
@@ -1659,15 +1768,30 @@ int qse_awk_rtx_strtonum (
 );
 /******/
 
+/****f* AWK/qse_awk_rtx_alloc
+ * NAME
+ *  qse_awk_rtx_alloc - allocate memory
+ * RETURN
+ *  The qse_awk_rtx_alloc() function returns a pointer to the memory block 
+ *  allocated on success, and QSE_NULL on failure.
+ * SYNOPSIS
+ */
 void* qse_awk_rtx_alloc (
 	qse_awk_rtx_t* rtx,
 	qse_size_t     size 
 );
+/******/
 
+/****f* AWK/qse_awk_rtx_free
+ * NAME
+ *  qse_awk_rtx_free - free memory
+ * SYNOPSIS
+ */
 void qse_awk_rtx_free (
 	qse_awk_rtx_t* rtx,
 	void*          ptr
 );
+/******/
 
 #ifdef __cplusplus
 }
diff --git a/qse/include/qse/cmn/map.h b/qse/include/qse/cmn/map.h
index 22693726..7d6fb3a3 100644
--- a/qse/include/qse/cmn/map.h
+++ b/qse/include/qse/cmn/map.h
@@ -1,5 +1,5 @@
 /*
- * $Id: map.h 75 2009-02-22 14:10:34Z hyunghwan.chung $
+ * $Id: map.h 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -206,7 +206,7 @@ struct qse_map_t
 #define QSE_MAP_COPIER_SIMPLE ((qse_map_copier_t)1)
 #define QSE_MAP_COPIER_INLINE ((qse_map_copier_t)2)
 
-/****d* Common/QSE_MAP_SIZE
+/****m* Common/QSE_MAP_SIZE
  * NAME
  *  QSE_MAP_SIZE - get the number of pairs
  * DESCRIPTION
@@ -216,7 +216,7 @@ struct qse_map_t
 #define QSE_MAP_SIZE(m) ((m)->size)
 /*****/
 
-/****d* Common/QSE_MAP_CAPA
+/****m* Common/QSE_MAP_CAPA
  * NAME
  *  QSE_MAP_CAPA - get the capacity of a map
  *
diff --git a/qse/include/qse/cmn/sll.h b/qse/include/qse/cmn/sll.h
index 9b066be1..c187add7 100644
--- a/qse/include/qse/cmn/sll.h
+++ b/qse/include/qse/cmn/sll.h
@@ -1,5 +1,5 @@
 /*
- * $Id: sll.h 75 2009-02-22 14:10:34Z hyunghwan.chung $
+ * $Id: sll.h 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -186,7 +186,7 @@ struct qse_sll_node_t
 #define QSE_SLL_SIZE(sll)   ((sll)->size)
 #define QSE_SLL_SCALE(sll)  ((sll)->scale)
 
-/****d* Common/QSE_SLL_DPTR
+/****m* Common/QSE_SLL_DPTR
  * NAME
  *  QSE_SLL_DPTR - get the data pointer in a node
  * SYNOPSIS
@@ -194,7 +194,7 @@ struct qse_sll_node_t
 #define QSE_SLL_DPTR(node)  ((node)->dptr)
 /******/
 
-/****d* Common/QSE_SLL_DLEN
+/****m* Common/QSE_SLL_DLEN
  * NAME
  *  QSE_SLL_DLEN - get the length of data in a node
  * SYNOPSIS
@@ -202,7 +202,7 @@ struct qse_sll_node_t
 #define QSE_SLL_DLEN(node)  ((node)->dlen)
 /******/
 
-/****d* Common/QSE_SLL_NEXT
+/****m* Common/QSE_SLL_NEXT
  * NAME
  *  QSE_SLL_NEXT - get the next node
  * SYNOPSIS
diff --git a/qse/include/qse/cmn/str.h b/qse/include/qse/cmn/str.h
index b91e9f7d..f7763148 100644
--- a/qse/include/qse/cmn/str.h
+++ b/qse/include/qse/cmn/str.h
@@ -1,5 +1,5 @@
 /*
- * $Id: str.h 83 2009-02-24 14:05:17Z hyunghwan.chung $
+ * $Id: str.h 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -345,18 +345,30 @@ void qse_str_close (
 	qse_str_t* str
 );
 
-/* 
- * If capa is 0, it doesn't allocate the buffer in advance. 
+/****f* Common/qse_str_init
+ * NAME
+ *  qse_str_init - initialize a dynamically resizable string
+ * NOTE
+ *  If the parameter capa is 0, it doesn't allocate the internal buffer 
+ *  in advance.
+ * SYNOPSIS
  */
 qse_str_t* qse_str_init (
-	qse_str_t* str,
+	qse_str_t*  str,
 	qse_mmgr_t* mmgr,
-	qse_size_t capa
+	qse_size_t  capa
 );
+/******/
 
+/****f* Common/qse_str_fini
+ * NAME
+ *  qse_str_fini - finialize a dynamically resizable string
+ * SYNOPSIS
+ */
 void qse_str_fini (
 	qse_str_t* str
 );
+/******/
 
 /****f* Common/qse_str_yield
  * NAME 
diff --git a/qse/include/qse/macros.h b/qse/include/qse/macros.h
index b4d4d9e6..f2bebd72 100644
--- a/qse/include/qse/macros.h
+++ b/qse/include/qse/macros.h
@@ -1,5 +1,5 @@
 /*
- * $Id: macros.h 75 2009-02-22 14:10:34Z hyunghwan.chung $
+ * $Id: macros.h 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -37,8 +37,22 @@
 #define QSE_WCHAR_EOF ((qse_wcint_t)-1)
 #define QSE_CHAR_EOF  ((qse_cint_t)-1)
 
+/****m* Base/QSE_SIZEOF
+ * NAME
+ *  QSE_SIZEOF - get data size in bytes
+ * SYNOPSIS
+ */
 #define QSE_SIZEOF(n)  (sizeof(n))
+/******/
+
+/****m* Base/QSE_COUNTOF
+ * NAME
+ *  QSE_COUNTOF - get the number elements in a array
+ * SYNOPSIS
+ */
 #define QSE_COUNTOF(n) (sizeof(n)/sizeof(n[0]))
+/******/
+
 #define QSE_OFFSETOF(type,member) ((qse_size_t)&((type*)0)->member)
 
 #define QSE_TYPE_IS_SIGNED(type) (((type)0) > ((type)-1))
@@ -152,7 +166,7 @@
 #	define QSE_END_NAMESPACE2(y,x)   }}
 #endif
 
-/****d* Base/QSE_DEFINE_COMMON_FIELDS
+/****m* Base/QSE_DEFINE_COMMON_FIELDS
  * NAME
  *  QSE_DEFINE_COMMON_FIELDS - define common fields
  * SYNOPSIS
@@ -161,7 +175,7 @@
 	qse_mmgr_t* mmgr;
 /******/
 	
-/****d* Base/QSE_DEFINE_COMMON_FUNCTIONS
+/****m* Base/QSE_DEFINE_COMMON_FUNCTIONS
  * NAME
  *  QSE_DEFINE_COMMON_FUNCTIONS - define common functions
  * SYNOPSIS
@@ -172,7 +186,7 @@ qse_mmgr_t* qse_##name##_getmmgr (qse_##name##_t* name); \
 void* qse_##name##_getxtn (qse_##name##_t* name);
 /******/
 
-/****d* Base/QSE_MMGR
+/****m* Base/QSE_MMGR
  * NAME
  *  QSE_MMGR - get the memory manager field
  * SYNOPSIS
@@ -180,7 +194,7 @@ void* qse_##name##_getxtn (qse_##name##_t* name);
 #define QSE_MMGR(obj) (obj->mmgr)
 /******/
 
-/****d* Base/QSE_XTN
+/****m* Base/QSE_XTN
  * NAME
  *  QSE_XTN - get a pointer to extension space
  * DESCRIPTION
@@ -192,7 +206,7 @@ void* qse_##name##_getxtn (qse_##name##_t* name);
 #define QSE_XTN(obj) ((void*)(obj + 1))
 /******/
 
-/****d* Base/QSE_IMPLEMENT_COMMON_FUNCTIONS
+/****m* Base/QSE_IMPLEMENT_COMMON_FUNCTIONS
  * NAME
  *  QSE_IMPLEMENT_COMMON_FUNCTIONS - implement common functions
  * SYNOPSIS
diff --git a/qse/include/qse/types.h b/qse/include/qse/types.h
index f696270c..7cda3b29 100644
--- a/qse/include/qse/types.h
+++ b/qse/include/qse/types.h
@@ -1,5 +1,5 @@
 /*
- * $Id: types.h 82 2009-02-24 10:07:01Z hyunghwan.chung $
+ * $Id: types.h 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -251,7 +251,11 @@ typedef qse_int_t   qse_ssize_t;
  */
 typedef qse_uint_t  qse_word_t;
 
-/* floating-point number */
+/****t* Base/qse_real_t
+ * NAME
+ *  qse_real_t - define a largest floating-pointer number type supported
+ ******
+ */
 #if defined(__FreeBSD__)
 	/* TODO: check if the support for long double is complete.
 	 *       if so, use long double for qse_real_t */
diff --git a/qse/lib/awk/Awk.cpp b/qse/lib/awk/Awk.cpp
index aa5c13f0..7fb2d470 100644
--- a/qse/lib/awk/Awk.cpp
+++ b/qse/lib/awk/Awk.cpp
@@ -1,5 +1,5 @@
 /*
- * $Id: Awk.cpp 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: Awk.cpp 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -340,7 +340,7 @@ int Awk::Argument::init (val_t* v)
 		this->inum = ((qse_awk_val_int_t*)v)->val;
 		this->rnum = (qse_real_t)((qse_awk_val_int_t*)v)->val;
 
-		this->str.ptr = qse_awk_rtx_valtostrdup (
+		this->str.ptr = qse_awk_rtx_valtocpldup (
 			this->run->run, v, &this->str.len);
 		if (this->str.ptr != QSE_NULL) return 0;
 	}
@@ -349,7 +349,7 @@ int Awk::Argument::init (val_t* v)
 		this->inum = (qse_long_t)((qse_awk_val_real_t*)v)->val;
 		this->rnum = ((qse_awk_val_real_t*)v)->val;
 
-		this->str.ptr = qse_awk_rtx_valtostrdup (
+		this->str.ptr = qse_awk_rtx_valtocpldup (
 			this->run->run, v, &this->str.len);
 		if (this->str.ptr != QSE_NULL) return 0;
 	}
@@ -358,7 +358,7 @@ int Awk::Argument::init (val_t* v)
 		this->inum = 0;
 		this->rnum = 0.0;
 
-		this->str.ptr = qse_awk_rtx_valtostrdup (
+		this->str.ptr = qse_awk_rtx_valtocpldup (
 			this->run->run, v, &this->str.len);
 		if (this->str.ptr != QSE_NULL) return 0;
 	}
diff --git a/qse/lib/awk/fnc.c b/qse/lib/awk/fnc.c
index 51535fa5..1cb84564 100644
--- a/qse/lib/awk/fnc.c
+++ b/qse/lib/awk/fnc.c
@@ -1,5 +1,5 @@
 /*
- * $Id: fnc.c 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: fnc.c 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -249,7 +249,7 @@ static int fnc_close (
 	}
 	else
 	{
-		name = qse_awk_rtx_valtostrdup (run, a0, &len);
+		name = qse_awk_rtx_valtocpldup (run, a0, &len);
 		if (name == QSE_NULL) return -1;
 	}
 
@@ -362,7 +362,7 @@ static int fnc_fflush (
 		}
 		else
 		{
-			str0 = qse_awk_rtx_valtostrdup (run, a0, &len0);
+			str0 = qse_awk_rtx_valtocpldup (run, a0, &len0);
 			if (str0 == QSE_NULL) return -1;
 		}
 
@@ -433,7 +433,7 @@ static int fnc_index (
 	}
 	else
 	{
-		str0 = qse_awk_rtx_valtostrdup (run, a0, &len0);
+		str0 = qse_awk_rtx_valtocpldup (run, a0, &len0);
 		if (str0 == QSE_NULL) return -1;
 	}
 
@@ -444,7 +444,7 @@ static int fnc_index (
 	}
 	else
 	{
-		str1 = qse_awk_rtx_valtostrdup (run, a1, &len1);
+		str1 = qse_awk_rtx_valtocpldup (run, a1, &len1);
 		if (str1 == QSE_NULL)
 		{
 			if (a0->type != QSE_AWK_VAL_STR) 
@@ -488,7 +488,7 @@ static int fnc_length (
 	}
 	else
 	{
-		str = qse_awk_rtx_valtostrdup (run, v, &len);
+		str = qse_awk_rtx_valtocpldup (run, v, &len);
 		if (str == QSE_NULL) return -1;
 		QSE_AWK_FREE (run->awk, str);
 	}
@@ -529,7 +529,7 @@ static int fnc_substr (
 	}
 	else 
 	{
-		str = qse_awk_rtx_valtostrdup (run, a0, &len);
+		str = qse_awk_rtx_valtocpldup (run, a0, &len);
 		if (str == QSE_NULL) return -1;
 	}
 
@@ -634,7 +634,7 @@ static int fnc_split (
 	}
 	else 
 	{
-		str = qse_awk_rtx_valtostrdup (run, a0, &str_len);
+		str = qse_awk_rtx_valtocpldup (run, a0, &str_len);
 		if (str == QSE_NULL) return -1;
 		str_free = str;
 	}
@@ -657,7 +657,7 @@ static int fnc_split (
 		}
 		else
 		{
-			fs_ptr = qse_awk_rtx_valtostrdup (run, t1, &fs_len);
+			fs_ptr = qse_awk_rtx_valtocpldup (run, t1, &fs_len);
 			if (fs_ptr == QSE_NULL)
 			{
 				if (str_free != QSE_NULL) 
@@ -683,7 +683,7 @@ static int fnc_split (
 		}
 		else
 		{
-			fs_ptr = qse_awk_rtx_valtostrdup (run, a2, &fs_len);
+			fs_ptr = qse_awk_rtx_valtocpldup (run, a2, &fs_len);
 			if (fs_ptr == QSE_NULL)
 			{
 				if (str_free != QSE_NULL) 
@@ -850,7 +850,7 @@ static int fnc_tolower (
 	}
 	else 
 	{
-		str = qse_awk_rtx_valtostrdup (run, a0, &len);
+		str = qse_awk_rtx_valtocpldup (run, a0, &len);
 		if (str == QSE_NULL) return -1;
 	}
 
@@ -889,7 +889,7 @@ static int fnc_toupper (
 	}
 	else 
 	{
-		str = qse_awk_rtx_valtostrdup (run, a0, &len);
+		str = qse_awk_rtx_valtocpldup (run, a0, &len);
 		if (str == QSE_NULL) return -1;
 	}
 
@@ -955,7 +955,7 @@ static int __substitute (qse_awk_rtx_t* run, qse_long_t max_count)
 	}
 	else
 	{
-		a0_ptr = qse_awk_rtx_valtostrdup (run, a0, &a0_len);
+		a0_ptr = qse_awk_rtx_valtocpldup (run, a0, &a0_len);
 		if (a0_ptr == QSE_NULL) 
 		{
 			FREE_A_PTRS (run->awk);
@@ -971,7 +971,7 @@ static int __substitute (qse_awk_rtx_t* run, qse_long_t max_count)
 	}
 	else
 	{
-		a1_ptr = qse_awk_rtx_valtostrdup (run, a1, &a1_len);
+		a1_ptr = qse_awk_rtx_valtocpldup (run, a1, &a1_len);
 		if (a1_ptr == QSE_NULL) 
 		{
 			FREE_A_PTRS (run->awk);
@@ -1026,7 +1026,7 @@ static int __substitute (qse_awk_rtx_t* run, qse_long_t max_count)
 		}
 		else
 		{
-			a2_ptr = qse_awk_rtx_valtostrdup (run, *a2_ref, &a2_len);
+			a2_ptr = qse_awk_rtx_valtocpldup (run, *a2_ref, &a2_len);
 			if (a2_ptr == QSE_NULL) 
 			{
 				FREE_A_PTRS (run->awk);
@@ -1234,7 +1234,7 @@ static int fnc_match (
 	}
 	else
 	{
-		str0 = qse_awk_rtx_valtostrdup (run, a0, &len0);
+		str0 = qse_awk_rtx_valtocpldup (run, a0, &len0);
 		if (str0 == QSE_NULL) return -1;
 	}
 
@@ -1251,7 +1251,7 @@ static int fnc_match (
 		}
 		else
 		{
-			str1 = qse_awk_rtx_valtostrdup (run, a1, &len1);
+			str1 = qse_awk_rtx_valtocpldup (run, a1, &len1);
 			if (str1 == QSE_NULL)
 			{
 				if (a0->type != QSE_AWK_VAL_STR) 
@@ -1356,7 +1356,7 @@ static int fnc_sprintf (
 	}
 	else
 	{
-		cs0.ptr = qse_awk_rtx_valtostrdup (run, a0, &cs0.len);
+		cs0.ptr = qse_awk_rtx_valtocpldup (run, a0, &cs0.len);
 		if (cs0.ptr == QSE_NULL) 
 		{
 			qse_str_fini (&fbu);
diff --git a/qse/lib/awk/rio.c b/qse/lib/awk/rio.c
index e9a78753..611b0332 100644
--- a/qse/lib/awk/rio.c
+++ b/qse/lib/awk/rio.c
@@ -1,5 +1,5 @@
 /*
- * $Id: rio.c 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: rio.c 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -217,7 +217,7 @@ int qse_awk_rtx_readio (
 	}
 	else 
 	{
-		rs_ptr = qse_awk_rtx_valtostrdup (run, rs, &rs_len);
+		rs_ptr = qse_awk_rtx_valtocpldup (run, rs, &rs_len);
 		if (rs_ptr == QSE_NULL)
 		{
 			qse_awk_rtx_refdownval (run, rs);
diff --git a/qse/lib/awk/std.c b/qse/lib/awk/std.c
index 7bfa94b5..db8fd13a 100644
--- a/qse/lib/awk/std.c
+++ b/qse/lib/awk/std.c
@@ -1,5 +1,5 @@
 /*
- * $Id: std.c 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: std.c 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -1268,7 +1268,7 @@ static int fnc_system (qse_awk_rtx_t* run, const qse_char_t* fnm, qse_size_t fnl
 	}
 	else
 	{
-		str = qse_awk_rtx_valtostrdup (run, v, &len);
+		str = qse_awk_rtx_valtocpldup (run, v, &len);
 		if (str == QSE_NULL) return -1;
 	}
 
diff --git a/qse/lib/awk/val.c b/qse/lib/awk/val.c
index 35af2921..9f0e6a90 100644
--- a/qse/lib/awk/val.c
+++ b/qse/lib/awk/val.c
@@ -1,5 +1,5 @@
 /*
- * $Id: val.c 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: val.c 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -730,15 +730,6 @@ static qse_char_t* str_to_str (
 }
 #endif
 
-/* TODO: current combination
-no buffer => indicated by NULL, option (PRINT)
-fixed buffer => indicated by FIXED, option (PRINT) => USE CPL INSTEAD, PRINT made an option
-dynamic buffer => option (CLEAR, PRINT) =>
-
- PRINT OPTION applies to real_to_str only.
-how to handle CLEAR...
- */
-
 static qse_char_t* str_to_str (
 	qse_awk_rtx_t* rtx, const qse_char_t* str, qse_size_t str_len,
 	qse_awk_rtx_valtostr_out_t* out)
@@ -1129,7 +1120,7 @@ qse_char_t* qse_awk_rtx_valtostr (
 	return QSE_NULL;
 }
 
-qse_char_t* qse_awk_rtx_valtostrdup (
+qse_char_t* qse_awk_rtx_valtocpldup (
 	qse_awk_rtx_t* rtx, qse_awk_val_t* v, qse_size_t* len)
 {
 	qse_awk_rtx_valtostr_out_t out;
diff --git a/qse/test/awk/awk02.c b/qse/test/awk/awk02.c
index 16582958..1944fcfb 100644
--- a/qse/test/awk/awk02.c
+++ b/qse/test/awk/awk02.c
@@ -1,5 +1,5 @@
 /*
- * $Id: awk02.c 86 2009-02-26 12:55:05Z hyunghwan.chung $ 
+ * $Id: awk02.c 90 2009-03-01 09:58:19Z hyunghwan.chung $ 
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -16,9 +16,9 @@
    limitations under the License.
  */
 
-/****S* AWK/Basic Loop
+/****S* AWK/Basic Loop With Deparsing
  * DESCRIPTION
- *  This program demonstrates how to use qse_awk_rtx_loop().
+ *  The program deparses the source code and prints it before executing it.
  * SOURCE
  */
 
diff --git a/qse/test/awk/awk03.c b/qse/test/awk/awk03.c
index 6c3a0e09..a8152741 100644
--- a/qse/test/awk/awk03.c
+++ b/qse/test/awk/awk03.c
@@ -1,5 +1,5 @@
 /*
- * $Id: awk03.c 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: awk03.c 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -103,7 +103,7 @@ int main ()
 			ret = -1; goto oops;
 		}
 
-		str = qse_awk_rtx_valtostrdup (rtx, v, &len);
+		str = qse_awk_rtx_valtocpldup (rtx, v, &len);
 		if (str == QSE_NULL)
 		{
 			qse_fprintf (QSE_STDERR, QSE_T("error: %s\n"), 
diff --git a/qse/test/awk/awk04.c b/qse/test/awk/awk04.c
index 8e17585d..4b0922e8 100644
--- a/qse/test/awk/awk04.c
+++ b/qse/test/awk/awk04.c
@@ -1,5 +1,5 @@
 /*
- * $Id: awk04.c 89 2009-02-28 15:27:03Z hyunghwan.chung $
+ * $Id: awk04.c 90 2009-03-01 09:58:19Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -105,7 +105,7 @@ int main ()
 		ret = -1; goto oops;
 	}
 
-	str = qse_awk_rtx_valtostrdup (rtx, v, &len);
+	str = qse_awk_rtx_valtocpldup (rtx, v, &len);
 	if (str == QSE_NULL)
 	{
 		qse_fprintf (QSE_STDERR, QSE_T("error: %s\n"),