Mercurial > hg > truffle
diff src/share/vm/runtime/fieldType.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/fieldType.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,92 @@ +/* + * Copyright 1997-2000 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +# include "incls/_precompiled.incl" +# include "incls/_fieldType.cpp.incl" + +void FieldType::skip_optional_size(symbolOop 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(symbolOop signature) { + return char2type(signature->byte_at(0)); +} + +// Check if it is a valid array signature +bool FieldType::is_valid_array_signature(symbolOop 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(symbolOop signature, jint* dimension, symbolOop* object_key, 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; + symbolOop element = oopFactory::new_symbol(signature->as_C_string() + index, CHECK_(T_BYTE)); + BasicType element_type = FieldType::basic_type(element); + if (element_type == T_OBJECT) { + char* object_type = element->as_C_string(); + object_type[element->utf8_length() - 1] = '\0'; + *object_key = oopFactory::new_symbol(object_type + 1, CHECK_(T_BYTE)); + } + // Pass dimension back to caller + *dimension = dim; + return element_type; +}