duke@435: /*
trims@2708:  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "classfile/systemDictionary.hpp"
stefank@2314: #include "memory/oopFactory.hpp"
stefank@2314: #include "oops/oop.inline.hpp"
stefank@2314: #include "oops/typeArrayKlass.hpp"
stefank@2314: #include "runtime/fieldType.hpp"
stefank@2314: #include "runtime/signature.hpp"
duke@435: 
coleenp@2497: void FieldType::skip_optional_size(Symbol* signature, int* index) {
duke@435:   jchar c = signature->byte_at(*index);
duke@435:   while (c >= '0' && c <= '9') {
duke@435:     *index = *index + 1;
duke@435:     c = signature->byte_at(*index);
duke@435:   }
duke@435: }
duke@435: 
coleenp@2497: BasicType FieldType::basic_type(Symbol* signature) {
duke@435:   return char2type(signature->byte_at(0));
duke@435: }
duke@435: 
duke@435: // Check if it is a valid array signature
coleenp@2497: bool FieldType::is_valid_array_signature(Symbol* sig) {
duke@435:   assert(sig->utf8_length() > 1, "this should already have been checked");
duke@435:   assert(sig->byte_at(0) == '[', "this should already have been checked");
duke@435:   // The first character is already checked
duke@435:   int i = 1;
duke@435:   int len = sig->utf8_length();
duke@435:   // First skip all '['s
duke@435:   while(i < len - 1 && sig->byte_at(i) == '[') i++;
duke@435: 
duke@435:   // Check type
duke@435:   switch(sig->byte_at(i)) {
duke@435:     case 'B': // T_BYTE
duke@435:     case 'C': // T_CHAR
duke@435:     case 'D': // T_DOUBLE
duke@435:     case 'F': // T_FLOAT
duke@435:     case 'I': // T_INT
duke@435:     case 'J': // T_LONG
duke@435:     case 'S': // T_SHORT
duke@435:     case 'Z': // T_BOOLEAN
duke@435:       // If it is an array, the type is the last character
duke@435:       return (i + 1 == len);
duke@435:     case 'L':
duke@435:       // If it is an object, the last character must be a ';'
duke@435:       return sig->byte_at(len - 1) == ';';
duke@435:   }
duke@435: 
duke@435:   return false;
duke@435: }
duke@435: 
duke@435: 
coleenp@2497: BasicType FieldType::get_array_info(Symbol* signature, FieldArrayInfo& fd, TRAPS) {
duke@435:   assert(basic_type(signature) == T_ARRAY, "must be array");
duke@435:   int index = 1;
duke@435:   int dim   = 1;
duke@435:   skip_optional_size(signature, &index);
duke@435:   while (signature->byte_at(index) == '[') {
duke@435:     index++;
duke@435:     dim++;
duke@435:     skip_optional_size(signature, &index);
duke@435:   }
duke@435:   ResourceMark rm;
coleenp@2497:   char *element = signature->as_C_string() + index;
coleenp@2497:   BasicType element_type = char2type(element[0]);
duke@435:   if (element_type == T_OBJECT) {
coleenp@2497:     int len = (int)strlen(element);
coleenp@2497:     assert(element[len-1] == ';', "last char should be a semicolon");
coleenp@2497:     element[len-1] = '\0';        // chop off semicolon
coleenp@2497:     fd._object_key = SymbolTable::new_symbol(element + 1, CHECK_(T_BYTE));
duke@435:   }
duke@435:   // Pass dimension back to caller
coleenp@2497:   fd._dimension = dim;
duke@435:   return element_type;
duke@435: }