author | stuefe |
Fri, 07 Sep 2018 07:52:35 +0200 | |
branch | stuefe-statistical-history |
changeset 57221 | 9653470b7294 |
parent 53244 | 9807daeb47c4 |
child 58722 | cba8afa5cfed |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#ifndef SHARE_RUNTIME_FIELDTYPE_HPP |
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#define SHARE_RUNTIME_FIELDTYPE_HPP |
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#include "memory/allocation.hpp" |
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#include "oops/symbol.hpp" |
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// Note: FieldType should be based on the SignatureIterator (or vice versa). |
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// In any case, this structure should be re-thought at some point. |
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// A FieldType is used to determine the type of a field from a signature string. |
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// Information returned by get_array_info, which is scoped to decrement |
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// reference count if a Symbol is created in the case of T_OBJECT |
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class FieldArrayInfo : public StackObj { |
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friend class FieldType; // field type can set these fields. |
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int _dimension; |
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Symbol* _object_key; |
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public: |
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int dimension() { return _dimension; } |
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Symbol* object_key() { return _object_key; } |
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// basic constructor |
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FieldArrayInfo() : _dimension(0), _object_key(NULL) {} |
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// destructor decrements object key's refcount if created |
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~FieldArrayInfo() { if (_object_key != NULL) _object_key->decrement_refcount(); } |
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}; |
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class FieldType: public AllStatic { |
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private: |
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static bool is_valid_array_signature(Symbol* signature); |
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public: |
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// Return basic type |
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static BasicType basic_type(Symbol* signature); |
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// Testing |
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static bool is_array(Symbol* signature) { return signature->utf8_length() > 1 && signature->char_at(0) == '[' && is_valid_array_signature(signature); } |
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static bool is_obj(Symbol* signature) { |
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int sig_length = signature->utf8_length(); |
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// Must start with 'L' and end with ';' |
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return (sig_length >= 2 && |
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(signature->char_at(0) == 'L') && |
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(signature->char_at(sig_length - 1) == ';')); |
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} |
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// Parse field and extract array information. Works for T_ARRAY only. |
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static BasicType get_array_info(Symbol* signature, FieldArrayInfo& ai, TRAPS); |
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}; |
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#endif // SHARE_RUNTIME_FIELDTYPE_HPP |