//===- ClassDefinitionDumper.cpp --------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "ClassDefinitionDumper.h"
#include "EnumDumper.h"
#include "FunctionDumper.h"
#include "LinePrinter.h"
#include "llvm-pdbdump.h"
#include "TypedefDumper.h"
#include "VariableDumper.h"

#include "llvm/DebugInfo/PDB/IPDBSession.h"
#include "llvm/DebugInfo/PDB/PDBExtras.h"
#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
#include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeEnum.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypePointer.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeTypedef.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTable.h"
#include "llvm/Support/Format.h"

using namespace llvm;
using namespace llvm::pdb;

ClassDefinitionDumper::ClassDefinitionDumper(LinePrinter &P)
    : PDBSymDumper(true), Printer(P) {}

void ClassDefinitionDumper::start(const PDBSymbolTypeUDT &Class) {
  std::string Name = Class.getName();
  WithColor(Printer, PDB_ColorItem::Keyword).get() << Class.getUdtKind() << " ";
  WithColor(Printer, PDB_ColorItem::Type).get() << Class.getName();

  auto Bases = Class.findAllChildren<PDBSymbolTypeBaseClass>();
  if (Bases->getChildCount() > 0) {
    Printer.Indent();
    Printer.NewLine();
    Printer << ":";
    uint32_t BaseIndex = 0;
    while (auto Base = Bases->getNext()) {
      Printer << " ";
      WithColor(Printer, PDB_ColorItem::Keyword).get() << Base->getAccess();
      if (Base->isVirtualBaseClass())
        WithColor(Printer, PDB_ColorItem::Keyword).get() << " virtual";
      WithColor(Printer, PDB_ColorItem::Type).get() << " " << Base->getName();
      if (++BaseIndex < Bases->getChildCount()) {
        Printer.NewLine();
        Printer << ",";
      }
    }
    Printer.Unindent();
  }

  Printer << " {";
  auto Children = Class.findAllChildren();
  if (Children->getChildCount() == 0) {
    Printer << "}";
    return;
  }

  // Try to dump symbols organized by member access level.  Public members
  // first, then protected, then private.  This might be slow, so it's worth
  // reconsidering the value of this if performance of large PDBs is a problem.
  // NOTE: Access level of nested types is not recorded in the PDB, so we have
  // a special case for them.
  SymbolGroupByAccess Groups;
  Groups.insert(std::make_pair(0, SymbolGroup()));
  Groups.insert(std::make_pair((int)PDB_MemberAccess::Private, SymbolGroup()));
  Groups.insert(
      std::make_pair((int)PDB_MemberAccess::Protected, SymbolGroup()));
  Groups.insert(std::make_pair((int)PDB_MemberAccess::Public, SymbolGroup()));

  while (auto Child = Children->getNext()) {
    PDB_MemberAccess Access = Child->getRawSymbol().getAccess();
    if (isa<PDBSymbolTypeBaseClass>(*Child))
      continue;

    auto &AccessGroup = Groups.find((int)Access)->second;

    if (auto Func = dyn_cast<PDBSymbolFunc>(Child.get())) {
      if (Func->isCompilerGenerated() && opts::pretty::ExcludeCompilerGenerated)
        continue;
      if (Func->getLength() == 0 && !Func->isPureVirtual() &&
          !Func->isIntroVirtualFunction())
        continue;
      Child.release();
      AccessGroup.Functions.push_back(std::unique_ptr<PDBSymbolFunc>(Func));
    } else if (auto Data = dyn_cast<PDBSymbolData>(Child.get())) {
      Child.release();
      AccessGroup.Data.push_back(std::unique_ptr<PDBSymbolData>(Data));
    } else {
      AccessGroup.Unknown.push_back(std::move(Child));
    }
  }

  int Count = 0;
  Count += dumpAccessGroup((PDB_MemberAccess)0, Groups[0]);
  Count += dumpAccessGroup(PDB_MemberAccess::Public,
                           Groups[(int)PDB_MemberAccess::Public]);
  Count += dumpAccessGroup(PDB_MemberAccess::Protected,
                           Groups[(int)PDB_MemberAccess::Protected]);
  Count += dumpAccessGroup(PDB_MemberAccess::Private,
                           Groups[(int)PDB_MemberAccess::Private]);
  if (Count > 0)
    Printer.NewLine();
  Printer << "}";
}

int ClassDefinitionDumper::dumpAccessGroup(PDB_MemberAccess Access,
                                           const SymbolGroup &Group) {
  if (Group.Functions.empty() && Group.Data.empty() && Group.Unknown.empty())
    return 0;

  int Count = 0;
  if (Access == PDB_MemberAccess::Private) {
    Printer.NewLine();
    WithColor(Printer, PDB_ColorItem::Keyword).get() << "private";
    Printer << ":";
  } else if (Access == PDB_MemberAccess::Protected) {
    Printer.NewLine();
    WithColor(Printer, PDB_ColorItem::Keyword).get() << "protected";
    Printer << ":";
  } else if (Access == PDB_MemberAccess::Public) {
    Printer.NewLine();
    WithColor(Printer, PDB_ColorItem::Keyword).get() << "public";
    Printer << ":";
  }
  Printer.Indent();
  for (auto iter = Group.Functions.begin(), end = Group.Functions.end();
       iter != end; ++iter) {
    ++Count;
    (*iter)->dump(*this);
  }
  for (auto iter = Group.Data.begin(), end = Group.Data.end(); iter != end;
       ++iter) {
    ++Count;
    (*iter)->dump(*this);
  }
  for (auto iter = Group.Unknown.begin(), end = Group.Unknown.end();
       iter != end; ++iter) {
    ++Count;
    (*iter)->dump(*this);
  }
  Printer.Unindent();
  return Count;
}

void ClassDefinitionDumper::dump(const PDBSymbolTypeBaseClass &Symbol) {}

void ClassDefinitionDumper::dump(const PDBSymbolData &Symbol) {
  VariableDumper Dumper(Printer);
  Dumper.start(Symbol);
}

void ClassDefinitionDumper::dump(const PDBSymbolFunc &Symbol) {
  if (Printer.IsSymbolExcluded(Symbol.getName()))
    return;

  Printer.NewLine();
  FunctionDumper Dumper(Printer);
  Dumper.start(Symbol, FunctionDumper::PointerType::None);
}

void ClassDefinitionDumper::dump(const PDBSymbolTypeVTable &Symbol) {}

void ClassDefinitionDumper::dump(const PDBSymbolTypeEnum &Symbol) {
  if (Printer.IsTypeExcluded(Symbol.getName()))
    return;

  Printer.NewLine();
  EnumDumper Dumper(Printer);
  Dumper.start(Symbol);
}

void ClassDefinitionDumper::dump(const PDBSymbolTypeTypedef &Symbol) {
  if (Printer.IsTypeExcluded(Symbol.getName()))
    return;

  Printer.NewLine();
  TypedefDumper Dumper(Printer);
  Dumper.start(Symbol);
}

void ClassDefinitionDumper::dump(const PDBSymbolTypeUDT &Symbol) {}