1 /* 2 * Copyright (c) 1997, 2010, 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(symbolOop 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(symbolOop 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(symbolOop 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(symbolOop signature, jint* dimension, symbolOop* object_key, 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 symbolOop element = oopFactory::new_symbol(signature->as_C_string() + index, CHECK_(T_BYTE)); 88 BasicType element_type = FieldType::basic_type(element); 89 if (element_type == T_OBJECT) { 90 char* object_type = element->as_C_string(); 91 object_type[element->utf8_length() - 1] = '\0'; 92 *object_key = oopFactory::new_symbol(object_type + 1, CHECK_(T_BYTE)); 93 } 94 // Pass dimension back to caller 95 *dimension = dim; 96 return element_type; 97 }