X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Foberon.c;h=29c40cb974b5a822bb89c18cfe567a2d464aa966;hb=ab13caca4af9fb7617a6dfeaaec3b250c5bda0ac;hp=9080fb144eadec7fad4d923d0c328491bb5f7334;hpb=789adb9354da345b13aa284f3f4f8f1046cadbc4;p=dsw-obn.git

diff --git a/src/oberon.c b/src/oberon.c
index 9080fb1..29c40cb 100644
--- a/src/oberon.c
+++ b/src/oberon.c
@@ -171,6 +171,17 @@ oberon_make_char(oberon_context_t * ctx, int64_t i)
 	return expr;
 }
 
+static oberon_expr_t *
+oberon_make_string(oberon_context_t * ctx, char * str)
+{
+	oberon_expr_t * expr;
+	expr = oberon_new_item(MODE_STRING, ctx -> string_type, true);
+	expr -> item.integer = str[0];
+	expr -> item.real = str[0];
+	expr -> item.string = str;
+	return expr;
+}
+
 static oberon_expr_t *
 oberon_make_real_typed(oberon_context_t * ctx, double r, oberon_type_t * result)
 {
@@ -1056,6 +1067,12 @@ oberon_cast_expr(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * p
 	return cast;
 }
 
+static oberon_expr_t *
+oberon_hard_cast_expr(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
+{
+	return oberon_new_operator(OP_HARDCAST, pref, expr, NULL);
+}
+
 static void
 oberon_check_dst(oberon_context_t * ctx, oberon_expr_t * dst)
 {
@@ -1660,9 +1677,7 @@ oberon_factor(oberon_context_t * ctx)
 			oberon_assert_token(ctx, CHAR);
 			break;
 		case STRING:
-			result = ctx -> string_type;
-			expr = oberon_new_item(MODE_STRING, result, true);
-			expr -> item.string = ctx -> string;
+			expr = oberon_make_string(ctx, ctx -> string);
 			oberon_assert_token(ctx, STRING);
 			break;
 		case REAL:
@@ -1699,7 +1714,7 @@ oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_
 	oberon_expr_t * expr;
 	oberon_type_t * result;
 
-	oberon_check_compatible_bin_expr_types(ctx, token, a -> result, b -> result);
+	oberon_check_compatible_bin_expr(ctx, token, a, b);
 	oberon_check_src(ctx, a);
 	if(token != IS)
 	{
@@ -1724,7 +1739,22 @@ oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_
 	}
 	else if((token >= EQUAL && token <= GEQ) || token == OR || token == AND)
 	{
-		result = oberon_get_longer_type(ctx, a -> result, b -> result);
+		if(oberon_is_string_of_one(a) && oberon_is_char_type(b -> result))
+		{
+			result = b -> result;
+		}
+		else if(oberon_is_string_of_one(b) && oberon_is_char_type(a -> result))
+		{
+			result = a -> result;
+		}
+		else if(oberon_is_string_of_one(a) && oberon_is_string_of_one(b))
+		{
+			result = ctx -> char_type;
+		}
+		else
+		{
+			result = oberon_get_longer_type(ctx, a -> result, b -> result);
+		}
 
 		if(oberon_is_const(a) && oberon_is_const(b)
 			&& (oberon_is_real_type(result) || oberon_is_integer_type(result)))
@@ -3126,7 +3156,7 @@ oberon_case_labels(oberon_context_t * ctx, oberon_expr_t * val)
 	oberon_expr_t * cond2;
 
 	e1 = (oberon_expr_t *) oberon_const_expr(ctx);
-	
+
 	e2 = NULL;
 	if(ctx -> token == DOTDOT)
 	{
@@ -4392,7 +4422,7 @@ oberon_make_ord_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
 	arg = list_args;
 	oberon_check_src(ctx, arg);
 
-	if(!oberon_is_char_type(arg -> result))
+	if(!oberon_is_char_type(arg -> result) && !oberon_is_string_of_one(arg))
 	{
 		oberon_error(ctx, "expected char");
 	}
@@ -4471,6 +4501,38 @@ oberon_make_odd_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
 	return expr;
 }
 
+static oberon_expr_t *
+oberon_make_cc_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+	if(num_args < 1)
+	{
+		oberon_error(ctx, "too few arguments");
+	}
+
+	if(num_args > 1)
+	{
+		oberon_error(ctx, "too mach arguments");
+	}
+
+	oberon_expr_t * arg;
+	arg = list_args;
+	oberon_check_src(ctx, arg);
+	oberon_check_const(ctx, arg);
+
+	if(!oberon_is_integer_type(arg -> result))
+	{
+		oberon_error(ctx, "expected integer");
+	}
+
+	/* n >= 0 && n <= 15 */
+
+	oberon_expr_t * cond1;
+	oberon_expr_t * cond2;
+	cond1 = oberon_make_bin_op(ctx, GEQ, arg, oberon_make_integer(ctx, 0));
+	cond2 = oberon_make_bin_op(ctx, LEQ, arg, oberon_make_integer(ctx, 15));
+	return oberon_make_bin_op(ctx, AND, cond1, cond2);
+}
+
 static oberon_expr_t *
 oberon_make_short_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
 {
@@ -4525,6 +4587,35 @@ oberon_make_long_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list
 	return expr;
 }
 
+static oberon_expr_t *
+oberon_make_val_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+	if(num_args < 2)
+	{
+		oberon_error(ctx, "too few arguments");
+	}
+
+	if(num_args > 2)
+	{
+		oberon_error(ctx, "too mach arguments");
+	}
+
+	oberon_expr_t * typ;
+	typ = list_args;
+	if(!oberon_is_type_expr(typ))
+	{
+		oberon_error(ctx, "requires type");
+	}
+
+	oberon_expr_t * arg;
+	arg = list_args -> next;
+	oberon_check_src(ctx, arg);
+
+	oberon_expr_t * expr;
+	expr = oberon_hard_cast_expr(ctx, arg, typ -> result);
+	return expr;
+}
+
 static oberon_expr_t *
 oberon_make_len_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
 {
@@ -4770,8 +4861,10 @@ oberon_create_context(ModuleImportCallback import_module)
 		oberon_new_intrinsic_type(ctx, "PTR", ctx -> system_ptr_type);
 
 		/* Functions */
+		oberon_new_intrinsic(ctx, "CC", oberon_make_cc_call, NULL);
 		oberon_new_intrinsic(ctx, "LSH", oberon_make_lsh_call, NULL);
 		oberon_new_intrinsic(ctx, "ROT", oberon_make_rot_call, NULL);
+		oberon_new_intrinsic(ctx, "VAL", oberon_make_val_call, NULL);
 
 	oberon_end_intrinsic_module(ctx, ctx -> system_module);