diff --git a/ase/awk/awk.h b/ase/awk/awk.h
index 0cdd5b1f..de607fa0 100644
--- a/ase/awk/awk.h
+++ b/ase/awk/awk.h
@@ -1,5 +1,5 @@
 /* 
- * $Id: awk.h,v 1.42 2006-04-05 15:56:20 bacon Exp $
+ * $Id: awk.h,v 1.43 2006-04-06 16:25:37 bacon Exp $
  */
 
 #ifndef _XP_AWK_AWK_H_
@@ -66,7 +66,8 @@ enum
 	XP_AWK_ELVALUE,     /* l-value required */
 
 	/* run time error */
-	XP_AWK_EDIVBYZERO   /* divide by zero */
+	XP_AWK_EDIVBYZERO,  /* divide by zero */
+	XP_AWK_EOPERAND     /* invalid operand */
 };
 
 #ifdef __cplusplus
diff --git a/ase/awk/err.c b/ase/awk/err.c
index 8768226b..ff2f8879 100644
--- a/ase/awk/err.c
+++ b/ase/awk/err.c
@@ -1,5 +1,5 @@
 /*
- * $Id: err.c,v 1.4 2006-04-05 15:56:20 bacon Exp $
+ * $Id: err.c,v 1.5 2006-04-06 16:25:37 bacon Exp $
  */
 
 #include <xp/awk/awk_i.h>
@@ -40,7 +40,8 @@ const xp_char_t* xp_awk_geterrstr (xp_awk_t* awk)
 		XP_TEXT("undefined identifier"),
 		XP_TEXT("l-value required"),
 
-		XP_TEXT("divide by zero")
+		XP_TEXT("divide by zero"),
+		XP_TEXT("invalid operand")
 	};
 
 	if (awk->errnum >= 0 && awk->errnum < xp_countof(__errstr)) {
diff --git a/ase/awk/run.c b/ase/awk/run.c
index 2f82d632..3f83dea2 100644
--- a/ase/awk/run.c
+++ b/ase/awk/run.c
@@ -1,5 +1,5 @@
 /*
- * $Id: run.c,v 1.35 2006-04-05 15:56:20 bacon Exp $
+ * $Id: run.c,v 1.36 2006-04-06 16:25:37 bacon Exp $
  */
 
 #include <xp/awk/awk_i.h>
@@ -104,6 +104,7 @@ int __printval (xp_awk_pair_t* pair)
 int xp_awk_run (xp_awk_t* awk)
 {
 	xp_size_t nglobals;
+	int n = 0;
 
 	// TODO: clear run stack/exit_level
 	awk->run.exit_level = EXIT_NONE;
@@ -122,29 +123,39 @@ int xp_awk_run (xp_awk_t* awk)
 		}
 	}	
 
-	if (awk->tree.begin != XP_NULL) 
+	if (n == 0 && awk->tree.begin != XP_NULL) 
 	{
 		xp_assert (awk->tree.begin->type == XP_AWK_NDE_BLK);
 		if (__run_block (awk, 
-			(xp_awk_nde_blk_t*)awk->tree.begin) == -1) return -1;
+			(xp_awk_nde_blk_t*)awk->tree.begin) == -1) n = -1;
 	}
 
-	if (awk->tree.end != XP_NULL) 
+	if (n == 0 && awk->tree.end != XP_NULL) 
 	{
 		xp_assert (awk->tree.end->type == XP_AWK_NDE_BLK);
 		if (__run_block (awk, 
-			(xp_awk_nde_blk_t*)awk->tree.end) == -1) return -1;
+			(xp_awk_nde_blk_t*)awk->tree.end) == -1) n = -1;
 	}
 
-xp_printf (XP_TEXT("---------------------------\n"));
+	nglobals = awk->tree.nglobals;
+	while (nglobals > 0)
+	{
+		--nglobals;
+		xp_awk_refdownval (awk, STACK_GLOBAL(awk,nglobals));
+		__raw_pop (awk);
+	}
+
+xp_printf (XP_TEXT("-BEGIN------------------------\n"));
 xp_awk_map_walk (&awk->run.named, __printval);
-	return 0;
+xp_printf (XP_TEXT("-END--------------------------\n"));
+	return n;
 }
 
 static int __run_block (xp_awk_t* awk, xp_awk_nde_blk_t* nde)
 {
 	xp_awk_nde_t* p;
 	xp_size_t nlocals;
+	int n = 0;
 
 	xp_assert (nde->type == XP_AWK_NDE_BLK);
 
@@ -168,7 +179,11 @@ static int __run_block (xp_awk_t* awk, xp_awk_nde_blk_t* nde)
 //xp_printf (XP_TEXT("executing block statements\n"));
 	while (p != XP_NULL && awk->run.exit_level == EXIT_NONE) 
 	{
-		if (__run_statement(awk,p) == -1) return -1;
+		if (__run_statement(awk,p) == -1) 
+		{
+			n = -1;
+			break;
+		}
 		p = p->next;
 	}
 
@@ -182,7 +197,7 @@ static int __run_block (xp_awk_t* awk, xp_awk_nde_blk_t* nde)
 		__raw_pop (awk);
 	}
 
-	return 0;
+	return n;
 }
 
 static int __run_statement (xp_awk_t* awk, xp_awk_nde_t* nde)
@@ -812,17 +827,48 @@ static xp_awk_val_t* __eval_binop_eq (
 	xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
 {
 	xp_awk_val_t* res = XP_NULL;
+	xp_long_t r = 0;
 
 	if (left->type == XP_AWK_VAL_INT &&
 	    right->type == XP_AWK_VAL_INT)
 	{
-		xp_long_t r = 
-			((xp_awk_val_int_t*)left)->val ==
-			((xp_awk_val_int_t*)right)->val;
-		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+		r = ((xp_awk_val_int_t*)left)->val ==
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_real_t*)left)->val ==
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_INT && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_int_t*)left)->val ==
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL &&
+		 right->type == XP_AWK_VAL_INT)
+	{
+		r = ((xp_awk_val_real_t*)left)->val ==
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_STR &&
+	         right->type == XP_AWK_VAL_STR)
+	{
+		r = xp_strxncmp (
+			((xp_awk_val_str_t*)left)->buf,
+			((xp_awk_val_str_t*)left)->len,
+			((xp_awk_val_str_t*)right)->buf,
+			((xp_awk_val_str_t*)right)->len) == 0;
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	res = xp_awk_makeintval (awk, r);
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -830,17 +876,48 @@ static xp_awk_val_t* __eval_binop_ne (
 	xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
 {
 	xp_awk_val_t* res = XP_NULL;
+	xp_long_t r = 0;
 
 	if (left->type == XP_AWK_VAL_INT &&
 	    right->type == XP_AWK_VAL_INT)
 	{
-		xp_long_t r = 
-			((xp_awk_val_int_t*)left)->val !=
-			((xp_awk_val_int_t*)right)->val;
-		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+		r = ((xp_awk_val_int_t*)left)->val !=
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_real_t*)left)->val !=
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_INT && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_int_t*)left)->val !=
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL &&
+		 right->type == XP_AWK_VAL_INT)
+	{
+		r = ((xp_awk_val_real_t*)left)->val !=
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_STR &&
+	         right->type == XP_AWK_VAL_STR)
+	{
+		r = xp_strxncmp (
+			((xp_awk_val_str_t*)left)->buf,
+			((xp_awk_val_str_t*)left)->len,
+			((xp_awk_val_str_t*)right)->buf,
+			((xp_awk_val_str_t*)right)->len) != 0;
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	res = xp_awk_makeintval (awk, r);
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -848,17 +925,48 @@ static xp_awk_val_t* __eval_binop_gt (
 	xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
 {
 	xp_awk_val_t* res = XP_NULL;
+	xp_long_t r = 0;
 
 	if (left->type == XP_AWK_VAL_INT &&
 	    right->type == XP_AWK_VAL_INT)
 	{
-		xp_long_t r = 
-			((xp_awk_val_int_t*)left)->val >
-			((xp_awk_val_int_t*)right)->val;
-		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+		r = ((xp_awk_val_int_t*)left)->val >
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_real_t*)left)->val >
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_INT && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_int_t*)left)->val >
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL &&
+		 right->type == XP_AWK_VAL_INT)
+	{
+		r = ((xp_awk_val_real_t*)left)->val >
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_STR &&
+	         right->type == XP_AWK_VAL_STR)
+	{
+		r = xp_strxncmp (
+			((xp_awk_val_str_t*)left)->buf,
+			((xp_awk_val_str_t*)left)->len,
+			((xp_awk_val_str_t*)right)->buf,
+			((xp_awk_val_str_t*)right)->len) > 0;
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	res = xp_awk_makeintval (awk, r);
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -866,17 +974,48 @@ static xp_awk_val_t* __eval_binop_ge (
 	xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
 {
 	xp_awk_val_t* res = XP_NULL;
+	xp_long_t r = 0;
 
 	if (left->type == XP_AWK_VAL_INT &&
 	    right->type == XP_AWK_VAL_INT)
 	{
-		xp_long_t r = 
-			((xp_awk_val_int_t*)left)->val >=
-			((xp_awk_val_int_t*)right)->val;
-		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+		r = ((xp_awk_val_int_t*)left)->val >=
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_real_t*)left)->val >=
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_INT && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_int_t*)left)->val >=
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL &&
+		 right->type == XP_AWK_VAL_INT)
+	{
+		r = ((xp_awk_val_real_t*)left)->val >=
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_STR &&
+	         right->type == XP_AWK_VAL_STR)
+	{
+		r = xp_strxncmp (
+			((xp_awk_val_str_t*)left)->buf,
+			((xp_awk_val_str_t*)left)->len,
+			((xp_awk_val_str_t*)right)->buf,
+			((xp_awk_val_str_t*)right)->len) >= 0;
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	res = xp_awk_makeintval (awk, r);
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -884,17 +1023,48 @@ static xp_awk_val_t* __eval_binop_lt (
 	xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
 {
 	xp_awk_val_t* res = XP_NULL;
+	xp_long_t r = 0;
 
 	if (left->type == XP_AWK_VAL_INT &&
 	    right->type == XP_AWK_VAL_INT)
 	{
-		xp_long_t r = 
-			((xp_awk_val_int_t*)left)->val <
-			((xp_awk_val_int_t*)right)->val;
-		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+		r = ((xp_awk_val_int_t*)left)->val <
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_real_t*)left)->val <
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_INT && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_int_t*)left)->val <
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL &&
+		 right->type == XP_AWK_VAL_INT)
+	{
+		r = ((xp_awk_val_real_t*)left)->val <
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_STR &&
+	         right->type == XP_AWK_VAL_STR)
+	{
+		r = xp_strxncmp (
+			((xp_awk_val_str_t*)left)->buf,
+			((xp_awk_val_str_t*)left)->len,
+			((xp_awk_val_str_t*)right)->buf,
+			((xp_awk_val_str_t*)right)->len) < 0;
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	res = xp_awk_makeintval (awk, r);
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -902,17 +1072,48 @@ static xp_awk_val_t* __eval_binop_le (
 	xp_awk_t* awk, xp_awk_val_t* left, xp_awk_val_t* right)
 {
 	xp_awk_val_t* res = XP_NULL;
+	xp_long_t r = 0;
 
 	if (left->type == XP_AWK_VAL_INT &&
 	    right->type == XP_AWK_VAL_INT)
 	{
-		xp_long_t r = 
-			((xp_awk_val_int_t*)left)->val <=
-			((xp_awk_val_int_t*)right)->val;
-		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+		r = ((xp_awk_val_int_t*)left)->val <=
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_real_t*)left)->val <=
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_INT && 
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		r = ((xp_awk_val_int_t*)left)->val <=
+		    ((xp_awk_val_real_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_REAL &&
+		 right->type == XP_AWK_VAL_INT)
+	{
+		r = ((xp_awk_val_real_t*)left)->val <=
+		    ((xp_awk_val_int_t*)right)->val;
+	}
+	else if (left->type == XP_AWK_VAL_STR &&
+	         right->type == XP_AWK_VAL_STR)
+	{
+		r = xp_strxncmp (
+			((xp_awk_val_str_t*)left)->buf,
+			((xp_awk_val_str_t*)left)->len,
+			((xp_awk_val_str_t*)right)->buf,
+			((xp_awk_val_str_t*)right)->len) <= 0;
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	res = xp_awk_makeintval (awk, r);
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -928,9 +1129,13 @@ static xp_awk_val_t* __eval_binop_lshift (
 			((xp_awk_val_int_t*)left)->val <<
 			((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -946,9 +1151,13 @@ static xp_awk_val_t* __eval_binop_rshift (
 			((xp_awk_val_int_t*)left)->val >>
 			((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -964,7 +1173,6 @@ static xp_awk_val_t* __eval_binop_plus (
 			((xp_awk_val_int_t*)left)->val + 
 			((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
 	}
 	else if (left->type == XP_AWK_VAL_REAL && 
 	         right->type == XP_AWK_VAL_REAL)
@@ -990,11 +1198,22 @@ static xp_awk_val_t* __eval_binop_plus (
 			((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makerealval (awk, r);
 	}
+	else if (left->type == XP_AWK_VAL_STR &&
+	         right->type == XP_AWK_VAL_STR)
+	{
+		res = xp_awk_makestrval2 (
+			((xp_awk_val_str_t*)left)->buf,
+			((xp_awk_val_str_t*)left)->len,
+			((xp_awk_val_str_t*)right)->buf,
+			((xp_awk_val_str_t*)right)->len);
+	}
 	else
 	{
-		/* TODO: trigger error */
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
+	// TODO: addition between integer and astring??? 1 + "123"
 
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -1010,7 +1229,6 @@ static xp_awk_val_t* __eval_binop_minus (
 			((xp_awk_val_int_t*)left)->val - 
 			((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
 	}
 	else if (left->type == XP_AWK_VAL_REAL && 
 	         right->type == XP_AWK_VAL_REAL)
@@ -1038,9 +1256,10 @@ static xp_awk_val_t* __eval_binop_minus (
 	}
 	else
 	{
-		/* TODO: trigger error */
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -1052,13 +1271,42 @@ static xp_awk_val_t* __eval_binop_mul (
 	if (left->type == XP_AWK_VAL_INT &&
 	    right->type == XP_AWK_VAL_INT)
 	{
-		xp_long_t r = 
-			((xp_awk_val_int_t*)left)->val *
-			((xp_awk_val_int_t*)right)->val;
+		xp_long_t r;
+
+		r = ((xp_awk_val_int_t*)left)->val *
+		    ((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
+	}
+	else if (left->type == XP_AWK_VAL_REAL &&
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		xp_real_t r;
+		r = ((xp_awk_val_real_t*)left)->val *
+		    ((xp_awk_val_real_t*)right)->val;
+		res = xp_awk_makerealval (awk, r);
+	}
+	else if (left->type == XP_AWK_VAL_INT &&
+	         right->type == XP_AWK_VAL_REAL)
+	{
+		xp_real_t r;
+		r = ((xp_awk_val_int_t*)left)->val *
+		    ((xp_awk_val_real_t*)right)->val;
+		res = xp_awk_makerealval (awk, r);
+	}
+	else if (left->type == XP_AWK_VAL_REAL &&
+	         right->type == XP_AWK_VAL_INT)
+	{
+		xp_real_t r;
+		r = ((xp_awk_val_real_t*)left)->val *
+		    ((xp_awk_val_int_t*)right)->val;
+		res = xp_awk_makerealval (awk, r);
+	}
+	else
+	{
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -1080,23 +1328,19 @@ static xp_awk_val_t* __eval_binop_div (
 		r = ((xp_awk_val_int_t*)left)->val /
 		    ((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
 	}
 	else if (left->type == XP_AWK_VAL_REAL &&
 	         right->type == XP_AWK_VAL_REAL)
 	{
 		xp_real_t r;
-
 		r = ((xp_awk_val_real_t*)left)->val /
 		    ((xp_awk_val_real_t*)right)->val;
 		res = xp_awk_makerealval (awk, r);
-		// TOOD: error handling
 	}
 	else if (left->type == XP_AWK_VAL_INT &&
 	         right->type == XP_AWK_VAL_REAL)
 	{
 		xp_real_t r;
-
 		r = ((xp_awk_val_int_t*)left)->val /
 		    ((xp_awk_val_real_t*)right)->val;
 		res = xp_awk_makerealval (awk, r);
@@ -1105,16 +1349,16 @@ static xp_awk_val_t* __eval_binop_div (
 	         right->type == XP_AWK_VAL_INT)
 	{
 		xp_real_t r;
-
 		r = ((xp_awk_val_real_t*)left)->val /
 		    ((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makerealval (awk, r);
 	}
 	else
 	{
-		// TODO: invalid operands for div 
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
@@ -1136,13 +1380,13 @@ static xp_awk_val_t* __eval_binop_mod (
 		r = ((xp_awk_val_int_t*)left)->val %
 		    ((xp_awk_val_int_t*)right)->val;
 		res = xp_awk_makeintval (awk, r);
-		// TOOD: error handling
 	}
 	else
 	{
-		// TODO: mod is only for integers
+		PANIC (awk, XP_AWK_EOPERAND);
 	}
 
+	if (res == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
 	return res;
 }
 
diff --git a/ase/awk/sa.c b/ase/awk/sa.c
index 55253ddc..5cd6297d 100644
--- a/ase/awk/sa.c
+++ b/ase/awk/sa.c
@@ -1,5 +1,5 @@
 /*
- * $Id: sa.c,v 1.14 2006-04-04 16:03:14 bacon Exp $
+ * $Id: sa.c,v 1.15 2006-04-06 16:25:37 bacon Exp $
  */
 
 #include <xp/awk/awk_i.h>
@@ -34,7 +34,22 @@ xp_char_t* xp_strxdup (const xp_char_t* str, xp_size_t len)
 	tmp = (xp_char_t*) xp_malloc ((len + 1) * xp_sizeof(xp_char_t));
 	if (tmp == XP_NULL) return XP_NULL;
 
-	xp_strxncpy (tmp, len + 1, str, len);
+	xp_strncpy (tmp, str, len);
+	return tmp;
+}
+
+xp_char_t* xp_strxdup2 (
+	const xp_char_t* str1, xp_size_t len1,
+	const xp_char_t* str2, xp_size_t len2)
+{
+	xp_char_t* tmp;
+
+	tmp = (xp_char_t*) xp_malloc (
+		(len1 + len2 + 1) * xp_sizeof(xp_char_t));
+	if (tmp == XP_NULL) return XP_NULL;
+
+	xp_strncpy (tmp, str1, len1);
+	xp_strncpy (tmp + len1, str2, len2);
 	return tmp;
 }
 
@@ -45,17 +60,12 @@ xp_size_t xp_strcpy (xp_char_t* buf, const xp_char_t* str)
 	return buf - org - 1;
 }
 
-xp_size_t xp_strxncpy (
-	xp_char_t* buf, xp_size_t bsz, const xp_char_t* str, xp_size_t len)
+xp_size_t xp_strncpy (xp_char_t* buf, const xp_char_t* str, xp_size_t len)
 {
-	xp_size_t n;
-
-	if (bsz <= 0) return 0;
-	if ((n = bsz - 1) > len) n = len;
-	xp_memcpy (buf, str, n * xp_sizeof(xp_char_t));
-	buf[n] = XP_CHAR('\0');
-
-	return n;
+	const xp_char_t* end = str + len;
+	while (str < end) *buf++ = *str++;
+	*buf = XP_CHAR('\0');
+	return len;
 }
 
 int xp_strcmp (const xp_char_t* s1, const xp_char_t* s2)
@@ -66,6 +76,21 @@ int xp_strcmp (const xp_char_t* s1, const xp_char_t* s2)
 	return 0;
 }
 
+int xp_strxncmp (
+	const xp_char_t* s1, xp_size_t len1, 
+	const xp_char_t* s2, xp_size_t len2)
+{
+	const xp_char_t* end1 = s1 + len1;
+	const xp_char_t* end2 = s2 + len2;
+
+	while (s1 < end1 && s2 < end2 && *s1 == *s2) {
+		s1++; s2++;
+	}
+	if (s1 == end1 && s2 == end2) return 0;
+	if (*s1 == *s2) return (s1 < end1)? 1: -1;
+	return (*s1 > *s2)? 1: -1;
+}
+
 int xp_printf (const xp_char_t* fmt, ...)
 {
 	int n;
diff --git a/ase/awk/sa.h b/ase/awk/sa.h
index a2f639f2..b0c4479f 100644
--- a/ase/awk/sa.h
+++ b/ase/awk/sa.h
@@ -1,5 +1,5 @@
 /*
- * $Id: sa.h,v 1.19 2006-04-04 16:03:14 bacon Exp $
+ * $Id: sa.h,v 1.20 2006-04-06 16:25:37 bacon Exp $
  */
 
 #ifndef _XP_AWK_SA_H_
@@ -89,16 +89,25 @@ xp_char_t* xp_strdup (const xp_char_t* str);
 #define xp_strxdup xp_awk_strxdup
 xp_char_t* xp_strxdup (const xp_char_t* str, xp_size_t len);
 
+#define xp_strxdup2 xp_awk_strxdup2
+xp_char_t* xp_strxdup2 (
+	const xp_char_t* str1, xp_size_t len1,
+	const xp_char_t* str2, xp_size_t len2);
+
 #define xp_strcpy xp_awk_strcpy
 xp_size_t xp_strcpy (xp_char_t* buf, const xp_char_t* str);
 
-#define xp_strxncpy xp_awk_strxncpy
-xp_size_t xp_strxncpy (
-	xp_char_t* buf, xp_size_t bsz, const xp_char_t* str, xp_size_t len);
+#define xp_strncpy xp_awk_strncpy
+xp_size_t xp_strncpy (xp_char_t* buf, const xp_char_t* str, xp_size_t len);
 
 #define xp_strcmp xp_awk_strcmp
 int xp_strcmp (const xp_char_t* s1, const xp_char_t* s2);
 
+#define xp_strxncmp xp_awk_strxncmp
+int xp_strxncmp (
+	const xp_char_t* s1, xp_size_t len1, 
+	const xp_char_t* s2, xp_size_t len2);
+
 #define xp_printf xp_awk_printf
 int xp_printf (const xp_char_t* fmt, ...);
 
diff --git a/ase/awk/val.c b/ase/awk/val.c
index d7e82d22..fddfd1d8 100644
--- a/ase/awk/val.c
+++ b/ase/awk/val.c
@@ -1,5 +1,5 @@
 /*
- * $Id: val.c,v 1.15 2006-04-04 16:50:36 bacon Exp $
+ * $Id: val.c,v 1.16 2006-04-06 16:25:37 bacon Exp $
  */
 
 #include <xp/awk/awk_i.h>
@@ -97,6 +97,27 @@ xp_awk_val_t* xp_awk_makestrval (const xp_char_t* str, xp_size_t len)
 	return (xp_awk_val_t*)val;
 }
 
+xp_awk_val_t* xp_awk_makestrval2 (
+	const xp_char_t* str1, xp_size_t len1, 
+	const xp_char_t* str2, xp_size_t len2)
+{
+	xp_awk_val_str_t* val;
+
+	val = (xp_awk_val_str_t*)xp_malloc(xp_sizeof(xp_awk_val_str_t));
+	if (val == XP_NULL) return XP_NULL;
+
+	val->type = XP_AWK_VAL_STR;
+	val->ref = 0;
+	val->len = len1 + len2;
+	val->buf = xp_strxdup2 (str1, len1, str2, len2);
+	if (val->buf == XP_NULL) {
+		xp_free (val);
+		return XP_NULL;
+	}
+
+	return (xp_awk_val_t*)val;
+}
+
 xp_bool_t xp_awk_isbuiltinval (xp_awk_val_t* val)
 {
 	return val == XP_NULL || val == xp_awk_val_nil ||
diff --git a/ase/awk/val.h b/ase/awk/val.h
index bac4f664..66b62315 100644
--- a/ase/awk/val.h
+++ b/ase/awk/val.h
@@ -1,5 +1,5 @@
 /*
- * $Id: val.h,v 1.12 2006-03-28 16:33:09 bacon Exp $
+ * $Id: val.h,v 1.13 2006-04-06 16:25:37 bacon Exp $
  */
 
 #ifndef _XP_AWK_VAL_H_
@@ -78,6 +78,9 @@ extern xp_awk_val_t* xp_awk_val_nil;
 xp_awk_val_t* xp_awk_makeintval (xp_awk_t* awk, xp_long_t v);
 xp_awk_val_t* xp_awk_makerealval (xp_awk_t* awk, xp_real_t v);
 xp_awk_val_t* xp_awk_makestrval (const xp_char_t* str, xp_size_t len);
+xp_awk_val_t* xp_awk_makestrval2 (
+	const xp_char_t* str1, xp_size_t len1, 
+	const xp_char_t* str2, xp_size_t len2);
 //xp_awk_val_t* xp_awk_makemapval ();
 
 xp_bool_t xp_awk_isbuiltinval (xp_awk_val_t* val);
diff --git a/ase/test/awk/awk.c b/ase/test/awk/awk.c
index 3095edf9..efdaf094 100644
--- a/ase/test/awk/awk.c
+++ b/ase/test/awk/awk.c
@@ -1,5 +1,5 @@
 /*
- * $Id: awk.c,v 1.15 2006-03-31 18:09:26 bacon Exp $
+ * $Id: awk.c,v 1.16 2006-04-06 16:25:37 bacon Exp $
  */
 
 #include <xp/awk/awk.h>
@@ -72,7 +72,7 @@ int xp_main (int argc, char* argv[])
 
 	xp_awk_setparseopt (awk, 
 		XP_AWK_EXPLICIT | XP_AWK_UNIQUE | 
-		XP_AWK_SHADING | XP_AWK_IMPLICIT);
+		XP_AWK_SHADING | XP_AWK_IMPLICIT | XP_AWK_SHIFT);
 
 	if (xp_awk_parse(awk) == -1) {
 		xp_printf (
@@ -87,6 +87,7 @@ int xp_main (int argc, char* argv[])
 			XP_TEXT("error: cannot run program - [%d] %s\n"), 
 			xp_awk_geterrnum(awk), xp_awk_geterrstr(awk));
 		xp_awk_close (awk);
+		return -1;
 	}
 
 	xp_awk_close (awk);