path: root/lib/Sema/DeclSpec.cpp

//===--- SemaDeclSpec.cpp - Declaration Specifier Semantic Analysis -------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file implements semantic analysis for declaration specifiers.
//
//===----------------------------------------------------------------------===//

#include "clang/Parse/ParseDiagnostic.h" // FIXME: remove this back-dependency!
#include "clang/Sema/DeclSpec.h"
#include "clang/Sema/ParsedTemplate.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/NestedNameSpecifier.h"
#include "clang/AST/TypeLoc.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/LangOptions.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/ErrorHandling.h"
#include <cstring>
using namespace clang;


static DiagnosticBuilder Diag(Diagnostic &D, SourceLocation Loc,
                              unsigned DiagID) {
  return D.Report(Loc, DiagID);
}


void UnqualifiedId::setTemplateId(TemplateIdAnnotation *TemplateId) {
  assert(TemplateId && "NULL template-id annotation?");
  Kind = IK_TemplateId;
  this->TemplateId = TemplateId;
  StartLocation = TemplateId->TemplateNameLoc;
  EndLocation = TemplateId->RAngleLoc;
}

void UnqualifiedId::setConstructorTemplateId(TemplateIdAnnotation *TemplateId) {
  assert(TemplateId && "NULL template-id annotation?");
  Kind = IK_ConstructorTemplateId;
  this->TemplateId = TemplateId;
  StartLocation = TemplateId->TemplateNameLoc;
  EndLocation = TemplateId->RAngleLoc;
}

CXXScopeSpec::CXXScopeSpec(const CXXScopeSpec &Other)
  : Range(Other.Range), ScopeRep(Other.ScopeRep), Buffer(0), 
    BufferSize(Other.BufferSize), BufferCapacity(Other.BufferSize) 
{
  if (BufferSize) {
    Buffer = static_cast<char *>(malloc(BufferSize));
    memcpy(Buffer, Other.Buffer, BufferSize);
  }
}

CXXScopeSpec &CXXScopeSpec::operator=(const CXXScopeSpec &Other) {
  Range = Other.Range;
  ScopeRep = Other.ScopeRep;
  if (Buffer && Other.Buffer && BufferCapacity >= Other.BufferSize) {
    // Re-use our storage.
    BufferSize = Other.BufferSize;
    memcpy(Buffer, Other.Buffer, BufferSize);
    return *this;
  }
  
  if (BufferCapacity)
    free(Buffer);
  if (Other.Buffer) {
    BufferSize = Other.BufferSize;
    BufferCapacity = BufferSize;
    Buffer = static_cast<char *>(malloc(BufferSize));
    memcpy(Buffer, Other.Buffer, BufferSize);
  } else {
    Buffer = 0;
    BufferSize = 0;
    BufferCapacity = 0;
  }
  return *this;
}

CXXScopeSpec::~CXXScopeSpec() {
  if (BufferCapacity)
    free(Buffer);
}

namespace {
  void Append(char *Start, char *End, char *&Buffer, unsigned &BufferSize,
              unsigned &BufferCapacity) {
    if (BufferSize + (End - Start) > BufferCapacity) {
      // Reallocate the buffer.
      unsigned NewCapacity 
        = std::max((unsigned)(BufferCapacity? BufferCapacity * 2 
                                            : sizeof(void*) * 2),
                   (unsigned)(BufferSize + (End - Start)));
      char *NewBuffer = static_cast<char *>(malloc(NewCapacity));
      memcpy(NewBuffer, Buffer, BufferSize);
      
      if (BufferCapacity)
        free(Buffer);
      Buffer = NewBuffer;
      BufferCapacity = NewCapacity;
    }
    
    memcpy(Buffer + BufferSize, Start, End - Start);
    BufferSize += End-Start;
  }
  
  /// \brief Save a source location to the given buffer.
  void SaveSourceLocation(SourceLocation Loc, char *&Buffer,
                          unsigned &BufferSize, unsigned &BufferCapacity) {
    unsigned Raw = Loc.getRawEncoding();
    Append(reinterpret_cast<char *>(&Raw),
           reinterpret_cast<char *>(&Raw) + sizeof(unsigned),
           Buffer, BufferSize, BufferCapacity);
  }
  
  /// \brief Save a pointer to the given buffer.
  void SavePointer(void *Ptr, char *&Buffer, unsigned &BufferSize,
                   unsigned &BufferCapacity) {
    Append(reinterpret_cast<char *>(&Ptr),
           reinterpret_cast<char *>(&Ptr) + </