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comparison: src/share/vm/runtime/fieldType.hpp
src/share/vm/runtime/fieldType.hpp
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| 1 /* | |
| 2 * Copyright (c) 1997, 2011, 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 #ifndef SHARE_VM_RUNTIME_FIELDTYPE_HPP | |
| 26 #define SHARE_VM_RUNTIME_FIELDTYPE_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "oops/symbol.hpp" | |
| 30 | |
| 31 // Note: FieldType should be based on the SignatureIterator (or vice versa). | |
| 32 // In any case, this structure should be re-thought at some point. | |
| 33 | |
| 34 // A FieldType is used to determine the type of a field from a signature string. | |
| 35 | |
| 36 // Information returned by get_array_info, which is scoped to decrement | |
| 37 // reference count if a Symbol is created in the case of T_OBJECT | |
| 38 class FieldArrayInfo : public StackObj { | |
| 39 friend class FieldType; // field type can set these fields. | |
| 40 int _dimension; | |
| 41 Symbol* _object_key; | |
| 42 public: | |
| 43 int dimension() { return _dimension; } | |
| 44 Symbol* object_key() { return _object_key; } | |
| 45 // basic constructor | |
| 46 FieldArrayInfo() : _dimension(0), _object_key(NULL) {} | |
| 47 // destructor decrements object key's refcount if created | |
| 48 ~FieldArrayInfo() { if (_object_key != NULL) _object_key->decrement_refcount(); } | |
| 49 }; | |
| 50 | |
| 51 | |
| 52 class FieldType: public AllStatic { | |
| 53 private: | |
| 54 static void skip_optional_size(Symbol* signature, int* index); | |
| 55 static bool is_valid_array_signature(Symbol* signature); | |
| 56 public: | |
| 57 | |
| 58 // Return basic type | |
| 59 static BasicType basic_type(Symbol* signature); | |
| 60 | |
| 61 // Testing | |
| 62 static bool is_array(Symbol* signature) { return signature->utf8_length() > 1 && signature->byte_at(0) == '[' && is_valid_array_signature(signature); } | |
| 63 | |
| 64 static bool is_obj(Symbol* signature) { | |
| 65 int sig_length = signature->utf8_length(); | |
| 66 // Must start with 'L' and end with ';' | |
| 67 return (sig_length >= 2 && | |
| 68 (signature->byte_at(0) == 'L') && | |
| 69 (signature->byte_at(sig_length - 1) == ';')); | |
| 70 } | |
| 71 | |
| 72 // Parse field and extract array information. Works for T_ARRAY only. | |
| 73 static BasicType get_array_info(Symbol* signature, FieldArrayInfo& ai, TRAPS); | |
| 74 }; | |
| 75 | |
| 76 #endif // SHARE_VM_RUNTIME_FIELDTYPE_HPP |
