--- /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;
+}