| /* |
| * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "memory/oopFactory.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "oops/typeArrayKlass.hpp" |
| #include "runtime/fieldType.hpp" |
| #include "runtime/signature.hpp" |
| |
| void FieldType::skip_optional_size(Symbol* signature, int* index) { |
| jchar c = signature->byte_at(*index); |
| while (c >= '0' && c <= '9') { |
| *index = *index + 1; |
| c = signature->byte_at(*index); |
| } |
| } |
| |
| BasicType FieldType::basic_type(Symbol* signature) { |
| return char2type(signature->byte_at(0)); |
| } |
| |
| // Check if it is a valid array signature |
| bool FieldType::is_valid_array_signature(Symbol* sig) { |
| assert(sig->utf8_length() > 1, "this should already have been checked"); |
| assert(sig->byte_at(0) == '[', "this should already have been checked"); |
| // The first character is already checked |
| int i = 1; |
| int len = sig->utf8_length(); |
| // First skip all '['s |
| while(i < len - 1 && sig->byte_at(i) == '[') i++; |
| |
| // Check type |
| switch(sig->byte_at(i)) { |
| case 'B': // T_BYTE |
| case 'C': // T_CHAR |
| case 'D': // T_DOUBLE |
| case 'F': // T_FLOAT |
| case 'I': // T_INT |
| case 'J': // T_LONG |
| case 'S': // T_SHORT |
| case 'Z': // T_BOOLEAN |
| // If it is an array, the type is the last character |
| return (i + 1 == len); |
| case 'L': |
| // If it is an object, the last character must be a ';' |
| return sig->byte_at(len - 1) == ';'; |
| } |
| |
| return false; |
| } |
| |
| |
| BasicType FieldType::get_array_info(Symbol* signature, FieldArrayInfo& fd, TRAPS) { |
| assert(basic_type(signature) == T_ARRAY, "must be array"); |
| int index = 1; |
| int dim = 1; |
| skip_optional_size(signature, &index); |
| while (signature->byte_at(index) == '[') { |
| index++; |
| dim++; |
| skip_optional_size(signature, &index); |
| } |
| ResourceMark rm; |
| char *element = signature->as_C_string() + index; |
| BasicType element_type = char2type(element[0]); |
| if (element_type == T_OBJECT) { |
| int len = (int)strlen(element); |
| assert(element[len-1] == ';', "last char should be a semicolon"); |
| element[len-1] = '\0'; // chop off semicolon |
| fd._object_key = SymbolTable::new_symbol(element + 1, CHECK_(T_BYTE)); |
| } |
| // Pass dimension back to caller |
| fd._dimension = dim; |
| return element_type; |
| } |