fieldType.hpp revision 1879:f95d63e2154a 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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24
25#ifndef SHARE_VM_RUNTIME_FIELDTYPE_HPP
26#define SHARE_VM_RUNTIME_FIELDTYPE_HPP
27
28#include "memory/allocation.hpp"
29#include "oops/symbolOop.hpp"
30
31// Note: FieldType should be based on the SignatureIterator (or vice versa).
32//       In any case, this structure should be re-thought at some point.
33
34// A FieldType is used to determine the type of a field from a signature string.
35
36class FieldType: public AllStatic {
37 private:
38  static void skip_optional_size(symbolOop signature, int* index);
39  static bool is_valid_array_signature(symbolOop signature);
40 public:
41
42  // Return basic type
43  static BasicType basic_type(symbolOop signature);
44
45  // Testing
46  static bool is_array(symbolOop signature) { return signature->utf8_length() > 1 && signature->byte_at(0) == '[' && is_valid_array_signature(signature); }
47
48  static bool is_obj(symbolOop signature) {
49     int sig_length = signature->utf8_length();
50     // Must start with 'L' and end with ';'
51     return (sig_length >= 2 &&
52             (signature->byte_at(0) == 'L') &&
53             (signature->byte_at(sig_length - 1) == ';'));
54  }
55
56  // Parse field and extract array information. Works for T_ARRAY only.
57  static BasicType get_array_info(symbolOop signature, jint* dimension, symbolOop *object_key, TRAPS);
58};
59
60#endif // SHARE_VM_RUNTIME_FIELDTYPE_HPP
61