X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Foberon.c;h=5816c2b3fb0a96f2076f0e6ff82fbeb2b87058d2;hb=51a1ab2543ec5c221d4a3a9ab89968ae7dd39981;hp=6cc5d1d193787867c68e74c0aec302d40a6022e0;hpb=36c1947b3e98abab25f16a0f1c2679125651fe95;p=dsw-obn.git

diff --git a/src/oberon.c b/src/oberon.c
index 6cc5d1d..5816c2b 100644
--- a/src/oberon.c
+++ b/src/oberon.c
@@ -60,7 +60,11 @@ enum {
 	NIL,
 	IMPORT,
 	REAL,
-	CHAR
+	CHAR,
+	STRING,
+	IF,
+	THEN,
+	ELSE
 };
 
 // =======================================================================
@@ -126,6 +130,15 @@ oberon_new_type_char(int size)
 	return x;
 }
 
+static oberon_type_t *
+oberon_new_type_string(int size)
+{
+	oberon_type_t * x;
+	x = oberon_new_type_ptr(OBERON_TYPE_STRING);
+	x -> size = size;
+	return x;
+}
+
 // =======================================================================
 //   TABLE
 // ======================================================================= 
@@ -370,6 +383,18 @@ oberon_read_ident(oberon_context_t * ctx)
 	{
 		ctx -> token = IS;
 	}
+	else if(strcmp(ident, "IF") == 0)
+	{
+		ctx -> token = IF;
+	}
+	else if(strcmp(ident, "THEN") == 0)
+	{
+		ctx -> token = THEN;
+	}
+	else if(strcmp(ident, "ELSE") == 0)
+	{
+		ctx -> token = ELSE;
+	}
 }
 
 static void
@@ -563,6 +588,36 @@ oberon_read_comment(oberon_context_t * ctx)
 	}
 }
 
+static void oberon_read_string(oberon_context_t * ctx)
+{
+	int c = ctx -> c;
+	oberon_get_char(ctx);
+
+	int start = ctx -> code_index;
+
+	while(ctx -> c != 0 && ctx -> c != c)
+	{
+		oberon_get_char(ctx);
+	}
+
+	if(ctx -> c == 0)
+	{
+		oberon_error(ctx, "unterminated string");
+	}
+
+	int end = ctx -> code_index;
+
+	oberon_get_char(ctx);
+
+	char * string = calloc(1, end - start + 1);
+	strncpy(string, &ctx -> code[start], end - start);
+
+	ctx -> token = STRING;
+	ctx -> string = string;
+
+	printf("oberon_read_string: string ((%s))\n", string);
+}
+
 static void oberon_read_token(oberon_context_t * ctx);
 
 static void
@@ -676,6 +731,12 @@ oberon_read_symbol(oberon_context_t * ctx)
 			ctx -> token = UPARROW;
 			oberon_get_char(ctx);
 			break;
+		case '"':
+			oberon_read_string(ctx);
+			break;
+		case '\'':
+			oberon_read_string(ctx);
+			break;			
 		default:
 			oberon_error(ctx, "invalid char %c", ctx -> c);
 			break;
@@ -903,11 +964,29 @@ oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t *
 	// Допускается:
 	//  Если классы типов равны
 	//  Если INTEGER переводится в REAL
+	//  Есди STRING переводится в ARRAY OF CHAR
 
 	bool error = false;
 	if(pref -> class != expr -> result -> class)
 	{
-		if(expr -> result -> class == OBERON_TYPE_INTEGER)
+		printf("expr class %i\n", expr -> result -> class);
+		printf("pref class %i\n", pref -> class);
+
+		if(expr -> result -> class == OBERON_TYPE_STRING)
+		{
+			if(pref -> class == OBERON_TYPE_ARRAY)
+			{
+				if(pref -> base -> class != OBERON_TYPE_CHAR)
+				{
+					error = true;
+				}
+			}
+			else
+			{
+				error = true;
+			}
+		}
+		else if(expr -> result -> class == OBERON_TYPE_INTEGER)
 		{
 			if(pref -> class != OBERON_TYPE_REAL)
 			{
@@ -922,7 +1001,7 @@ oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t *
 
 	if(error)
 	{
-		oberon_error(ctx, "incompatible types");
+		oberon_error(ctx, "oberon_autocast_to: incompatible types");
 	}
 
 	if(pref -> class == OBERON_TYPE_INTEGER || pref -> class == OBERON_TYPE_REAL)
@@ -939,6 +1018,7 @@ oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t *
 	else if(pref -> class == OBERON_TYPE_RECORD)
 	{
 		oberon_check_record_compatibility(ctx, expr -> result, pref);
+		expr = oberno_make_record_cast(ctx, expr, pref);
 	}
 	else if(pref -> class == OBERON_TYPE_POINTER)
 	{
@@ -1154,6 +1234,7 @@ oberon_make_call_proc(oberon_context_t * ctx, oberon_object_t * proc, int num_ar
 	|| ((x) == INTEGER) \
 	|| ((x) == REAL) \
 	|| ((x) == CHAR) \
+	|| ((x) == STRING) \
 	|| ((x) == NIL) \
 	|| ((x) == LPAREN) \
 	|| ((x) == NOT) \
@@ -1478,16 +1559,22 @@ oberon_factor(oberon_context_t * ctx)
 			break;
 		case INTEGER:
 			result = oberon_get_type_of_int_value(ctx, ctx -> integer);
-			expr = oberon_new_item(MODE_INTEGER, result, 1);
+			expr = oberon_new_item(MODE_INTEGER, result, true);
 			expr -> item.integer = ctx -> integer;
 			oberon_assert_token(ctx, INTEGER);
 			break;
 		case CHAR:
 			result = ctx -> char_type;
-			expr = oberon_new_item(MODE_CHAR, result, 1);
+			expr = oberon_new_item(MODE_CHAR, result, true);
 			expr -> item.integer = ctx -> integer;
 			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;
+			oberon_assert_token(ctx, STRING);
+			break;
 		case REAL:
 			result = (ctx -> longmode) ? (ctx -> longreal_type) : (ctx -> real_type);
 			expr = oberon_new_item(MODE_REAL, result, 1);
@@ -1495,12 +1582,12 @@ oberon_factor(oberon_context_t * ctx)
 			oberon_assert_token(ctx, REAL);
 			break;
 		case TRUE:
-			expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, 1);
+			expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, true);
 			expr -> item.boolean = true;
 			oberon_assert_token(ctx, TRUE);
 			break;
 		case FALSE:
-			expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, 1);
+			expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, true);
 			expr -> item.boolean = false;
 			oberon_assert_token(ctx, FALSE);
 			break;
@@ -1516,7 +1603,7 @@ oberon_factor(oberon_context_t * ctx)
 			break;
 		case NIL:
 			oberon_assert_token(ctx, NIL);
-			expr = oberon_new_item(MODE_NIL, ctx -> void_ptr_type, 1);
+			expr = oberon_new_item(MODE_NIL, ctx -> void_ptr_type, true);
 			break;
 		default:
 			oberon_error(ctx, "invalid expression");
@@ -1569,6 +1656,10 @@ oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_
 				|| b -> result -> class == OBERON_TYPE_INTEGER
 				|| a -> result -> class == OBERON_TYPE_REAL
 				|| b -> result -> class == OBERON_TYPE_REAL)
+			{
+				// accept
+			}
+			else
 			{
 				oberon_error(ctx, "used only with numeric types");
 			}
@@ -2773,6 +2864,9 @@ oberon_decl_seq(oberon_context_t * ctx)
 	oberon_prevent_undeclarated_procedures(ctx);
 }
 
+static void
+oberon_statement_seq(oberon_context_t * ctx);
+
 static void
 oberon_assign(oberon_context_t * ctx, oberon_expr_t * src, oberon_expr_t * dst)
 {
@@ -2805,6 +2899,36 @@ oberon_statement(oberon_context_t * ctx)
 			oberon_opt_proc_parens(ctx, item1);
 		}
 	}
+	else if(ctx -> token == IF)
+	{
+		gen_label_t * end;
+		gen_label_t * els;
+		oberon_expr_t * cond;
+
+		els = oberon_generator_reserve_label(ctx);
+		end = oberon_generator_reserve_label(ctx);
+
+		oberon_assert_token(ctx, IF);
+		cond = oberon_expr(ctx);
+		if(cond -> result -> class != OBERON_TYPE_BOOLEAN)
+		{
+			oberon_error(ctx, "condition must be boolean");
+		}
+		oberon_assert_token(ctx, THEN);
+		oberon_generate_branch(ctx, cond, false, els);
+		oberon_statement_seq(ctx);
+		oberon_generate_goto(ctx, end);
+
+		if(ctx -> token == ELSE)
+		{
+			oberon_generate_label(ctx, els);
+			oberon_assert_token(ctx, ELSE);
+			oberon_statement_seq(ctx);
+		}
+
+		oberon_generate_label(ctx, end);
+		oberon_assert_token(ctx, END);		
+	}
 	else if(ctx -> token == RETURN)
 	{
 		oberon_assert_token(ctx, RETURN);
@@ -2950,6 +3074,9 @@ register_default_types(oberon_context_t * ctx)
 	ctx -> void_ptr_type -> base = ctx -> void_type;
 	oberon_generator_init_type(ctx, ctx -> void_ptr_type);
 
+	ctx -> string_type = oberon_new_type_string(1);
+	oberon_generator_init_type(ctx, ctx -> string_type);
+
 	ctx -> bool_type = oberon_new_type_boolean();
 	oberon_define_type(ctx -> world_scope, "BOOLEAN", ctx -> bool_type, 1);