aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "classfile/systemDictionary.hpp"
aoqi@0: #include "memory/oopFactory.hpp"
aoqi@0: #include "oops/oop.inline.hpp"
aoqi@0: #include "oops/typeArrayKlass.hpp"
aoqi@0: #include "runtime/fieldType.hpp"
aoqi@0: #include "runtime/signature.hpp"
aoqi@0: 
aoqi@0: void FieldType::skip_optional_size(Symbol* signature, int* index) {
aoqi@0:   jchar c = signature->byte_at(*index);
aoqi@0:   while (c >= '0' && c <= '9') {
aoqi@0:     *index = *index + 1;
aoqi@0:     c = signature->byte_at(*index);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: BasicType FieldType::basic_type(Symbol* signature) {
aoqi@0:   return char2type(signature->byte_at(0));
aoqi@0: }
aoqi@0: 
aoqi@0: // Check if it is a valid array signature
aoqi@0: bool FieldType::is_valid_array_signature(Symbol* sig) {
aoqi@0:   assert(sig->utf8_length() > 1, "this should already have been checked");
aoqi@0:   assert(sig->byte_at(0) == '[', "this should already have been checked");
aoqi@0:   // The first character is already checked
aoqi@0:   int i = 1;
aoqi@0:   int len = sig->utf8_length();
aoqi@0:   // First skip all '['s
aoqi@0:   while(i < len - 1 && sig->byte_at(i) == '[') i++;
aoqi@0: 
aoqi@0:   // Check type
aoqi@0:   switch(sig->byte_at(i)) {
aoqi@0:     case 'B': // T_BYTE
aoqi@0:     case 'C': // T_CHAR
aoqi@0:     case 'D': // T_DOUBLE
aoqi@0:     case 'F': // T_FLOAT
aoqi@0:     case 'I': // T_INT
aoqi@0:     case 'J': // T_LONG
aoqi@0:     case 'S': // T_SHORT
aoqi@0:     case 'Z': // T_BOOLEAN
aoqi@0:       // If it is an array, the type is the last character
aoqi@0:       return (i + 1 == len);
aoqi@0:     case 'L':
aoqi@0:       // If it is an object, the last character must be a ';'
aoqi@0:       return sig->byte_at(len - 1) == ';';
aoqi@0:   }
aoqi@0: 
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: BasicType FieldType::get_array_info(Symbol* signature, FieldArrayInfo& fd, TRAPS) {
aoqi@0:   assert(basic_type(signature) == T_ARRAY, "must be array");
aoqi@0:   int index = 1;
aoqi@0:   int dim   = 1;
aoqi@0:   skip_optional_size(signature, &index);
aoqi@0:   while (signature->byte_at(index) == '[') {
aoqi@0:     index++;
aoqi@0:     dim++;
aoqi@0:     skip_optional_size(signature, &index);
aoqi@0:   }
aoqi@0:   ResourceMark rm;
aoqi@0:   char *element = signature->as_C_string() + index;
aoqi@0:   BasicType element_type = char2type(element[0]);
aoqi@0:   if (element_type == T_OBJECT) {
aoqi@0:     int len = (int)strlen(element);
aoqi@0:     assert(element[len-1] == ';', "last char should be a semicolon");
aoqi@0:     element[len-1] = '\0';        // chop off semicolon
aoqi@0:     fd._object_key = SymbolTable::new_symbol(element + 1, CHECK_(T_BYTE));
aoqi@0:   }
aoqi@0:   // Pass dimension back to caller
aoqi@0:   fd._dimension = dim;
aoqi@0:   return element_type;
aoqi@0: }