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1 /*
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2 * Copyright 1997-2002 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // Note: FieldType should be based on the SignatureIterator (or vice versa).
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26 // In any case, this structure should be re-thought at some point.
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27
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28 // A FieldType is used to determine the type of a field from a signature string.
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29
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30 class FieldType: public AllStatic {
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31 private:
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32 static void skip_optional_size(symbolOop signature, int* index);
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33 static bool is_valid_array_signature(symbolOop signature);
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34 public:
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35
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36 // Return basic type
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37 static BasicType basic_type(symbolOop signature);
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38
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39 // Testing
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40 static bool is_array(symbolOop signature) { return signature->utf8_length() > 1 && signature->byte_at(0) == '[' && is_valid_array_signature(signature); }
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41
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42 static bool is_obj(symbolOop signature) {
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43 int sig_length = signature->utf8_length();
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44 // Must start with 'L' and end with ';'
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45 return (sig_length >= 2 &&
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46 (signature->byte_at(0) == 'L') &&
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47 (signature->byte_at(sig_length - 1) == ';'));
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48 }
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49
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50 // Parse field and extract array information. Works for T_ARRAY only.
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51 static BasicType get_array_info(symbolOop signature, jint* dimension, symbolOop *object_key, TRAPS);
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52 };
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