Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/runtime/fieldType.cpp
src/share/vm/runtime/fieldType.cpp
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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 #include "precompiled.hpp" | |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "memory/oopFactory.hpp" | |
| 28 #include "oops/oop.inline.hpp" | |
| 29 #include "oops/typeArrayKlass.hpp" | |
| 30 #include "runtime/fieldType.hpp" | |
| 31 #include "runtime/signature.hpp" | |
| 32 | |
| 33 void FieldType::skip_optional_size(Symbol* signature, int* index) { | |
| 34 jchar c = signature->byte_at(*index); | |
| 35 while (c >= '0' && c <= '9') { | |
| 36 *index = *index + 1; | |
| 37 c = signature->byte_at(*index); | |
| 38 } | |
| 39 } | |
| 40 | |
| 41 BasicType FieldType::basic_type(Symbol* signature) { | |
| 42 return char2type(signature->byte_at(0)); | |
| 43 } | |
| 44 | |
| 45 // Check if it is a valid array signature | |
| 46 bool FieldType::is_valid_array_signature(Symbol* sig) { | |
| 47 assert(sig->utf8_length() > 1, "this should already have been checked"); | |
| 48 assert(sig->byte_at(0) == '[', "this should already have been checked"); | |
| 49 // The first character is already checked | |
| 50 int i = 1; | |
| 51 int len = sig->utf8_length(); | |
| 52 // First skip all '['s | |
| 53 while(i < len - 1 && sig->byte_at(i) == '[') i++; | |
| 54 | |
| 55 // Check type | |
| 56 switch(sig->byte_at(i)) { | |
| 57 case 'B': // T_BYTE | |
| 58 case 'C': // T_CHAR | |
| 59 case 'D': // T_DOUBLE | |
| 60 case 'F': // T_FLOAT | |
| 61 case 'I': // T_INT | |
| 62 case 'J': // T_LONG | |
| 63 case 'S': // T_SHORT | |
| 64 case 'Z': // T_BOOLEAN | |
| 65 // If it is an array, the type is the last character | |
| 66 return (i + 1 == len); | |
| 67 case 'L': | |
| 68 // If it is an object, the last character must be a ';' | |
| 69 return sig->byte_at(len - 1) == ';'; | |
| 70 } | |
| 71 | |
| 72 return false; | |
| 73 } | |
| 74 | |
| 75 | |
| 76 BasicType FieldType::get_array_info(Symbol* signature, FieldArrayInfo& fd, TRAPS) { | |
| 77 assert(basic_type(signature) == T_ARRAY, "must be array"); | |
| 78 int index = 1; | |
| 79 int dim = 1; | |
| 80 skip_optional_size(signature, &index); | |
| 81 while (signature->byte_at(index) == '[') { | |
| 82 index++; | |
| 83 dim++; | |
| 84 skip_optional_size(signature, &index); | |
| 85 } | |
| 86 ResourceMark rm; | |
| 87 char *element = signature->as_C_string() + index; | |
| 88 BasicType element_type = char2type(element[0]); | |
| 89 if (element_type == T_OBJECT) { | |
| 90 int len = (int)strlen(element); | |
| 91 assert(element[len-1] == ';', "last char should be a semicolon"); | |
| 92 element[len-1] = '\0'; // chop off semicolon | |
| 93 fd._object_key = SymbolTable::new_symbol(element + 1, CHECK_(T_BYTE)); | |
| 94 } | |
| 95 // Pass dimension back to caller | |
| 96 fd._dimension = dim; | |
| 97 return element_type; | |
| 98 } |
