diff --git a/qse/include/qse/awk/awk.h b/qse/include/qse/awk/awk.h
index be5f8bb2..0dd427ad 100644
--- a/qse/include/qse/awk/awk.h
+++ b/qse/include/qse/awk/awk.h
@@ -864,7 +864,7 @@ struct qse_awk_fnc_spec_t
 	/** 
 	 * when this field is set to a non-zero value bitwise-ORed of 
 	 * #qse_awk_trait_t enumerators, the function is available if 
-	 * this field bitwise-ANDed the global trait option produces
+	 * this field bitwise-ANDed with the global trait option produces
 	 * this field itself.
 	 * 
 	 * this field doesn't take effect for a module function.
diff --git a/qse/lib/awk/fnc.c b/qse/lib/awk/fnc.c
index 6511755b..37cc701b 100644
--- a/qse/lib/awk/fnc.c
+++ b/qse/lib/awk/fnc.c
@@ -58,46 +58,46 @@ static int fnc_asorti (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi);
 static qse_awk_fnc_t sysfnctab[] = 
 {
 	/* io functions */
-	{ {QSE_T("close"),    5}, 0, { {1,     2, QSE_NULL},       fnc_close,  QSE_AWK_RIO }, QSE_NULL},
-	{ {QSE_T("fflush"),   6}, 0, { {0,     1, QSE_NULL},       fnc_fflush, QSE_AWK_RIO }, QSE_NULL},
+	{ {QSE_T("close"),    5}, 0, { {1,     2, QSE_NULL},        fnc_close,  QSE_AWK_RIO }, QSE_NULL},
+	{ {QSE_T("fflush"),    6}, 0, { {0,     1, QSE_NULL},        fnc_fflush,  QSE_AWK_RIO }, QSE_NULL},
 
 	/* type info/conversion */
-	{ {QSE_T("int"),      3}, 0, { {1,     1, QSE_NULL},       fnc_int,              0 }, QSE_NULL},
-	{ {QSE_T("isnil"),    5}, 0, { {1,     1, QSE_NULL},       fnc_isnil,            0 }, QSE_NULL},
-	{ {QSE_T("ismap"),    5}, 0, { {1,     1, QSE_NULL},       fnc_ismap,            0 }, QSE_NULL},
-	{ {QSE_T("typename"), 8}, 0, { {1,     1, QSE_NULL},       fnc_typename,         0 }, QSE_NULL},
+	{ {QSE_T("int"),      3}, 0, { {1,     1, QSE_NULL},        fnc_int,              0 }, QSE_NULL},
+	{ {QSE_T("isnil"),    5}, 0, { {1,     1, QSE_NULL},        fnc_isnil,            0 }, QSE_NULL},
+	{ {QSE_T("ismap"),    5}, 0, { {1,     1, QSE_NULL},        fnc_ismap,            0 }, QSE_NULL},
+	{ {QSE_T("typename"), 8}, 0, { {1,     1, QSE_NULL},        fnc_typename,         0 }, QSE_NULL},
 
 	/* map(array) sort */
-	{ {QSE_T("asort"),    5}, 0, { {1,     3, QSE_T("rrv")},   fnc_asort,            0 }, QSE_NULL},
-	{ {QSE_T("asorti"),   6}, 0, { {1,     3, QSE_T("rrv")},   fnc_asorti,           0 }, QSE_NULL},
+	{ {QSE_T("asort"),    5}, 0, { {1,     3, QSE_T("rrv")},    fnc_asort,            0 }, QSE_NULL},
+	{ {QSE_T("asorti"),   6}, 0, { {1,     3, QSE_T("rrv")},    fnc_asorti,           0 }, QSE_NULL},
  
 	/* string functions */
-	{ {QSE_T("gsub"),     4}, 0, { {2,     3, QSE_T("xvr")},   qse_awk_fnc_gsub,     0 }, QSE_NULL},
-	{ {QSE_T("index"),    5}, 0, { {2,     3, QSE_NULL},       qse_awk_fnc_index,    0 }, QSE_NULL},
-	{ {QSE_T("length"),   6}, 1, { {0,     1, QSE_NULL},       qse_awk_fnc_length,   0 }, QSE_NULL},
-	{ {QSE_T("match"),    5}, 0, { {2,     4, QSE_T("vxvr")},  qse_awk_fnc_match,    0 }, QSE_NULL},
-	{ {QSE_T("split"),    5}, 0, { {2,     3, QSE_T("vrx")},   qse_awk_fnc_split,    0 }, QSE_NULL},
-	{ {QSE_T("sprintf"),  7}, 0, { {1, A_MAX, QSE_NULL},       qse_awk_fnc_sprintf,  0 }, QSE_NULL},
-	{ {QSE_T("sub"),      3}, 0, { {2,     3, QSE_T("xvr")},   qse_awk_fnc_sub,      0 }, QSE_NULL},
-	{ {QSE_T("substr"),   6}, 0, { {2,     3, QSE_NULL},       qse_awk_fnc_substr,   0 }, QSE_NULL},
-	{ {QSE_T("tolower"),  7}, 0, { {1,     1, QSE_NULL},       qse_awk_fnc_tolower,  0 }, QSE_NULL},
-	{ {QSE_T("toupper"),  7}, 0, { {1,     1, QSE_NULL},       qse_awk_fnc_toupper,  0 }, QSE_NULL},
+	{ {QSE_T("gsub"),     4}, 0, { {2,     3, QSE_T("xvr")},    qse_awk_fnc_gsub,     0 }, QSE_NULL},
+	{ {QSE_T("index"),    5}, 0, { {2,     3, QSE_NULL},        qse_awk_fnc_index,    0 }, QSE_NULL},
+	{ {QSE_T("length"),   6}, 1, { {0,     1, QSE_NULL},        qse_awk_fnc_length,   0 }, QSE_NULL},
+	{ {QSE_T("match"),    5}, 0, { {2,     4, QSE_T("vxvr")},   qse_awk_fnc_match,    0 }, QSE_NULL},
+	{ {QSE_T("split"),    5}, 0, { {2,     3, QSE_T("vrx")},    qse_awk_fnc_split,    0 }, QSE_NULL},
+	{ {QSE_T("sprintf"),  7}, 0, { {1, A_MAX, QSE_NULL},        qse_awk_fnc_sprintf,  0 }, QSE_NULL},
+	{ {QSE_T("sub"),      3}, 0, { {2,     3, QSE_T("xvr")},    qse_awk_fnc_sub,      0 }, QSE_NULL},
+	{ {QSE_T("substr"),   6}, 0, { {2,     3, QSE_NULL},        qse_awk_fnc_substr,   0 }, QSE_NULL},
+	{ {QSE_T("tolower"),  7}, 0, { {1,     1, QSE_NULL},        qse_awk_fnc_tolower,  0 }, QSE_NULL},
+	{ {QSE_T("toupper"),  7}, 0, { {1,     1, QSE_NULL},        qse_awk_fnc_toupper,  0 }, QSE_NULL},
 
 	/* math functions */
-	{ {QSE_T("sin"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
-	{ {QSE_T("cos"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
-	{ {QSE_T("tan"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
-	{ {QSE_T("atan"),     4}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
-	{ {QSE_T("atan2"),    5}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
-	{ {QSE_T("log"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
-	{ {QSE_T("log10"),    5}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
-	{ {QSE_T("exp"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
-	{ {QSE_T("sqrt"),     4}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,         0 }, QSE_NULL},
+	{ {QSE_T("sin"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("cos"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("tan"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("atan"),     4}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("atan2"),    5}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("log"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("log10"),    5}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("exp"),      3}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("sqrt"),     4}, 0, { {A_MAX, 0, QSE_T("math") },  QSE_NULL,             0 }, QSE_NULL},
 
 	/* time functions */
-	{ {QSE_T("mktime"),   6}, 0, { {A_MAX, 0, QSE_T("sys") },   QSE_NULL,          0 }, QSE_NULL},
-	{ {QSE_T("strftime"), 8}, 0, { {A_MAX, 0, QSE_T("sys") },   QSE_NULL,          0 }, QSE_NULL},
-	{ {QSE_T("systime"),  7}, 0, { {A_MAX, 0, QSE_T("sys") },   QSE_NULL,          0 }, QSE_NULL}
+	{ {QSE_T("mktime"),   6}, 0, { {A_MAX, 0, QSE_T("sys") },   QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("strftime"), 8}, 0, { {A_MAX, 0, QSE_T("sys") },   QSE_NULL,             0 }, QSE_NULL},
+	{ {QSE_T("systime"),  7}, 0, { {A_MAX, 0, QSE_T("sys") },   QSE_NULL,             0 }, QSE_NULL}
 };
 
 qse_awk_fnc_t* qse_awk_addfnc (qse_awk_t* awk, const qse_char_t* name, const qse_awk_fnc_spec_t* spec)
diff --git a/qse/lib/awk/parse.c b/qse/lib/awk/parse.c
index dc8af106..03ab2c6a 100644
--- a/qse/lib/awk/parse.c
+++ b/qse/lib/awk/parse.c
@@ -5340,12 +5340,12 @@ static qse_awk_nde_t* parse_primary_ident_segs (qse_awk_t* awk, const qse_awk_lo
 				break;
 
 			case QSE_AWK_MOD_INT:
-				nde = new_int_node (awk, sym.u.in.val, xloc);
+				nde = new_int_node(awk, sym.u.in.val, xloc);
 				/* i don't remember the symbol in the original form */
 				break;
 
 			case QSE_AWK_MOD_FLT:
-				nde = new_flt_node (awk, sym.u.flt.val, xloc);
+				nde = new_flt_node(awk, sym.u.flt.val, xloc);
 				/* i don't remember the symbol in the original form */
 				break;
 
@@ -5372,7 +5372,7 @@ static qse_awk_nde_t* parse_primary_ident (qse_awk_t* awk, const qse_awk_loc_t*
 
 	if (nsegs <= 1)
 	{
-		nde = parse_primary_ident_noseg (awk, xloc, &name[0]);
+		nde = parse_primary_ident_noseg(awk, xloc, &name[0]);
 		if (!nde) qse_awk_freemem (awk, name[0].ptr);
 	}
 	else
@@ -5388,8 +5388,8 @@ static qse_awk_nde_t* parse_primary_ident (qse_awk_t* awk, const qse_awk_loc_t*
 			capa = qse_strncpy (&full.ptr[0], name[0].ptr, name[0].len);
 			for (i = 1; i < nsegs; i++) 
 			{
-				capa += qse_strcpy (&full.ptr[capa], QSE_T("::"));
-				capa += qse_strncpy (&full.ptr[capa], name[i].ptr, name[i].len);
+				capa += qse_strcpy(&full.ptr[capa], QSE_T("::"));
+				capa += qse_strncpy(&full.ptr[capa], name[i].ptr, name[i].len);
 			}
 			full.ptr[capa] = QSE_T('\0');
 			full.len = capa;
@@ -7086,7 +7086,7 @@ static qse_awk_mod_t* query_module (qse_awk_t* awk, const qse_cstr_t segs[], int
 					}
 					else
 					{
-						qse_char_t* olderrmsg = qse_awk_backuperrmsg(awk);
+						const qse_char_t* olderrmsg = qse_awk_backuperrmsg(awk);
 						qse_awk_seterrfmt (awk, QSE_AWK_ENOENT, QSE_NULL, QSE_T("module '%.*js' not found - %js"), (int)(12 + buflen), &buf[1], olderrmsg);
 					}
 					awk->prm.modclose (awk, md.handle);
@@ -7125,7 +7125,7 @@ done:
 		}
 		else
 		{
-			qse_char_t* olderrmsg = qse_awk_backuperrmsg(awk);
+			const qse_char_t* olderrmsg = qse_awk_backuperrmsg(awk);
 			qse_awk_seterrfmt (awk, QSE_AWK_ENOENT, QSE_NULL, QSE_T("unable to find '%.*js' in module '%.*js' - %js"), (int)segs[1].len, segs[1].ptr, (int)segs[0].len, segs[0].ptr, olderrmsg);
 		}
 		return QSE_NULL;