//===- COFF.h - COFF object file implementation -----------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the COFFObjectFile class.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_OBJECT_COFF_H
#define LLVM_OBJECT_COFF_H

#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/COFF.h"
#include "llvm/Support/Endian.h"

namespace llvm {
namespace object {

struct coff_file_header {
  support::ulittle16_t Machine;
  support::ulittle16_t NumberOfSections;
  support::ulittle32_t TimeDateStamp;
  support::ulittle32_t PointerToSymbolTable;
  support::ulittle32_t NumberOfSymbols;
  support::ulittle16_t SizeOfOptionalHeader;
  support::ulittle16_t Characteristics;
};

struct coff_symbol {
  struct StringTableOffset {
    support::ulittle32_t Zeroes;
    support::ulittle32_t Offset;
  };

  union {
    char ShortName[8];
    StringTableOffset Offset;
  } Name;

  support::ulittle32_t Value;
  support::little16_t SectionNumber;

  struct {
    support::ulittle8_t BaseType;
    support::ulittle8_t ComplexType;
  } Type;

  support::ulittle8_t  StorageClass;
  support::ulittle8_t  NumberOfAuxSymbols;
};

struct coff_section {
  char Name[8];
  support::ulittle32_t VirtualSize;
  support::ulittle32_t VirtualAddress;
  support::ulittle32_t SizeOfRawData;
  support::ulittle32_t PointerToRawData;
  support::ulittle32_t PointerToRelocations;
  support::ulittle32_t PointerToLinenumbers;
  support::ulittle16_t NumberOfRelocations;
  support::ulittle16_t NumberOfLinenumbers;
  support::ulittle32_t Characteristics;
};

struct coff_relocation {
  support::ulittle32_t VirtualAddress;
  support::ulittle32_t SymbolTableIndex;
  support::ulittle16_t Type;
};

class COFFObjectFile : public ObjectFile {
private:
  const coff_file_header *Header;
  const coff_section     *SectionTable;
  const coff_symbol      *SymbolTable;
  const char             *StringTable;
        uint32_t          StringTableSize;

        error_code        getSection(int32_t index,
                                     const coff_section *&Res) const;
        error_code        getString(uint32_t offset, StringRef &Res) const;
        error_code        getSymbol(uint32_t index,
                                    const coff_symbol *&Res) const;

  const coff_symbol      *toSymb(DataRefImpl Symb) const;
  const coff_section     *toSec(DataRefImpl Sec) const;
  const coff_relocation  *toRel(DataRefImpl Rel) const;

protected:
  virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
  virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
  virtual error_code getSymbolOffset(DataRefImpl Symb, uint64_t &Res) const;
  virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
  virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
  virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
  virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const;
  virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const;
  virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::SymbolType &Res) const;

  virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
  virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
  virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
  virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
  virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
  virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
  virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
  virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
  virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
  virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
                                           bool &Result) const;
  virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
  virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;

  virtual error_code getRelocationNext(DataRefImpl Rel,
                                       RelocationRef &Res) const;
  virtual error_code getRelocationAddress(DataRefImpl Rel,
                                          uint64_t &Res) const;
  virtual error_code getRelocationSymbol(DataRefImpl Rel,
                                         SymbolRef &Res) const;
  virtual error_code getRelocationType(DataRefImpl Rel,
                                       uint32_t &Res) const;
  virtual error_code getRelocationTypeName(DataRefImpl Rel,
                                           SmallVectorImpl<char> &Result) const;
  virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
                                                 int64_t &Res) const;
  virtual error_code getRelocationValueString(DataRefImpl Rel,
                                           SmallVectorImpl<char> &Result) const;

public:
  COFFObjectFile(MemoryBuffer *Object, error_code &ec);
  virtual symbol_iterator begin_symbols() const;
  virtual symbol_iterator end_symbols() const;
  virtual section_iterator begin_sections() const;
  virtual section_iterator end_sections() const;

  virtual uint8_t getBytesInAddress() const;
  virtual StringRef getFileFormatName() const;
  virtual unsigned getArch() const;
};

}
}

#endif