ELFAttributeValue.cpp revision 37b74a387bb3993387029859c2d9d051c41c724e
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
16namespace mcld {
17
18size_t ELFAttributeValue::getSize() const {
19  size_t size = 0;
20
21  if (isIntValue())
22    size += leb128::size<uint32_t>(m_IntValue);
23
24  if (isStringValue())
25    size += m_StringValue.length() + 1 /* for NULL-terminator */;
26
27  if (size <= 0)
28    // unknown type of the value
29    llvm::report_fatal_error("Unknown type of attribtue value!");
30
31  return size;
32}
33
34bool ELFAttributeValue::isDefaultValue() const {
35  if (isUninitialized()) {
36    // Uninitialized attribute means default value
37    return true;
38  } else {
39    if (isIntValue() && (m_IntValue != 0))
40      return false;
41    if (isStringValue() && !m_StringValue.empty())
42      return false;
43
44    // The value hold in the storage is the "default value by default" (i.e., 0
45    // for int type, empty string for string type), but we need to check whether
46    // the "default value" is defined (that is, hasNoDefault() = false.)
47    return !hasNoDefault();
48  }
49  // unreachable
50}
51
52bool ELFAttributeValue::equals(const ELFAttributeValue& pValue) const {
53  if ((pValue.type() != m_Type) || isUninitialized())
54    return false;
55
56  if (isIntValue() && (m_IntValue != pValue.getIntValue()))
57    return false;
58
59  if (isStringValue() && (m_StringValue != pValue.getStringValue()))
60    return false;
61
62  return true;
63}
64
65}  // namespace mcld
66