1/*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "classfile/symbolTable.hpp"
27#include "classfile/systemDictionary.hpp"
28#include "memory/oopFactory.hpp"
29#include "memory/resourceArea.hpp"
30#include "oops/oop.inline.hpp"
31#include "oops/typeArrayKlass.hpp"
32#include "runtime/fieldType.hpp"
33#include "runtime/signature.hpp"
34
35BasicType FieldType::basic_type(Symbol* signature) {
36 return char2type(signature->char_at(0));
37}
38
39// Check if it is a valid array signature
40bool FieldType::is_valid_array_signature(Symbol* sig) {
41 assert(sig->utf8_length() > 1, "this should already have been checked");
42 assert(sig->char_at(0) == '[', "this should already have been checked");
43 // The first character is already checked
44 int i = 1;
45 int len = sig->utf8_length();
46 // First skip all '['s
47 while(i < len - 1 && sig->char_at(i) == '[') i++;
48
49 // Check type
50 switch(sig->char_at(i)) {
51 case 'B': // T_BYTE
52 case 'C': // T_CHAR
53 case 'D': // T_DOUBLE
54 case 'F': // T_FLOAT
55 case 'I': // T_INT
56 case 'J': // T_LONG
57 case 'S': // T_SHORT
58 case 'Z': // T_BOOLEAN
59 // If it is an array, the type is the last character
60 return (i + 1 == len);
61 case 'L':
62 // If it is an object, the last character must be a ';'
63 return sig->char_at(len - 1) == ';';
64 }
65
66 return false;
67}
68
69
70BasicType FieldType::get_array_info(Symbol* signature, FieldArrayInfo& fd, TRAPS) {
71 assert(basic_type(signature) == T_ARRAY, "must be array");
72 int index = 1;
73 int dim = 1;
74 while (signature->char_at(index) == '[') {
75 index++;
76 dim++;
77 }
78 ResourceMark rm;
79 char *element = signature->as_C_string() + index;
80 BasicType element_type = char2type(element[0]);
81 if (element_type == T_OBJECT) {
82 int len = (int)strlen(element);
83 assert(element[len-1] == ';', "last char should be a semicolon");
84 element[len-1] = '\0'; // chop off semicolon
85 fd._object_key = SymbolTable::new_symbol(element + 1);
86 }
87 // Pass dimension back to caller
88 fd._dimension = dim;
89 return element_type;
90}
91