1//===- ELFAttributeValue.cpp ----------------------------------------------===//
2//
3//                     The MCLinker Project
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include <mcld/Target/ELFAttributeValue.h>
11
12#include <llvm/Support/ErrorHandling.h>
13
14#include <mcld/Support/LEB128.h>
15
16using namespace mcld;
17
18size_t ELFAttributeValue::getSize() const
19{
20  size_t size = 0;
21
22  if (isIntValue())
23    size += leb128::size<uint32_t>(m_IntValue);
24
25  if (isStringValue())
26    size += m_StringValue.length() + 1 /* for NULL-terminator */;
27
28  if (size <= 0)
29    // unknown type of the value
30    llvm::report_fatal_error("Unknown type of attribtue value!");
31
32  return size;
33}
34
35bool ELFAttributeValue::isDefaultValue() const
36{
37  if (isUninitialized()) {
38    // Uninitialized attribute means default value
39    return true;
40  } else {
41    if (isIntValue() && (m_IntValue != 0))
42      return false;
43    if (isStringValue() && !m_StringValue.empty())
44      return false;
45
46    // The value hold in the storage is the "default value by default" (i.e., 0
47    // for int type, empty string for string type), but we need to check whether
48    // the "default value" is defined (that is, hasNoDefault() = false.)
49    return !hasNoDefault();
50  }
51  // unreachable
52}
53
54bool ELFAttributeValue::equals(const ELFAttributeValue& pValue) const
55{
56  if ((pValue.type() != m_Type) || isUninitialized())
57    return false;
58
59  if (isIntValue() && (m_IntValue != pValue.getIntValue()))
60    return false;
61
62  if (isStringValue() && (m_StringValue != pValue.getStringValue()))
63    return false;
64
65  return true;
66}
67