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 16 namespace mcld { 17 18 size_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 34 bool 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 52 bool 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
