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

#ifndef LLVM_TOOLS_LLVMPDBUTIL_FORMAT_UTIL_H
#define LLVM_TOOLS_LLVMPDBUTIL_FORMAT_UTIL_H

#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/FormatAdapters.h"
#include "llvm/Support/FormatVariadic.h"

#include <string>
#include <type_traits>

namespace llvm {
namespace pdb {

#define PUSH_MASKED_FLAG(Enum, Mask, TheOpt, Value, Text)                      \
  if (Enum::TheOpt == (Value & Mask))                                          \
    Opts.push_back(Text);

#define PUSH_FLAG(Enum, TheOpt, Value, Text)                                   \
  PUSH_MASKED_FLAG(Enum, Enum::TheOpt, TheOpt, Value, Text)

#define RETURN_CASE(Enum, X, Ret)                                              \
  case Enum::X:                                                                \
    return Ret;

template <typename T> static std::string formatUnknownEnum(T Value) {
  return formatv("unknown ({0})",
                 static_cast<typename std::underlying_type<T>::type>(Value))
      .str();
}

std::string formatSegmentOffset(uint16_t Segment, uint32_t Offset);

std::string typesetItemList(ArrayRef<std::string> Opts, uint32_t IndentLevel,
                            uint32_t GroupSize, StringRef Sep);

std::string typesetStringList(uint32_t IndentLevel,
                              ArrayRef<StringRef> Strings);

/// Returns the number of digits in the given integer.
inline int NumDigits(uint64_t N) {
  if (N < 10ULL)
    return 1;
  if (N < 100ULL)
    return 2;
  if (N < 1000ULL)
    return 3;
  if (N < 10000ULL)
    return 4;
  if (N < 100000ULL)
    return 5;
  if (N < 1000000ULL)
    return 6;
  if (N < 10000000ULL)
    return 7;
  if (N < 100000000ULL)
    return 8;
  if (N < 1000000000ULL)
    return 9;
  if (N < 10000000000ULL)
    return 10;
  if (N < 100000000000ULL)
    return 11;
  if (N < 1000000000000ULL)
    return 12;
  if (N < 10000000000000ULL)
    return 13;
  if (N < 100000000000000ULL)
    return 14;
  if (N < 1000000000000000ULL)
    return 15;
  if (N < 10000000000000000ULL)
    return 16;
  if (N < 100000000000000000ULL)
    return 17;
  if (N < 1000000000000000000ULL)
    return 18;
  if (N < 10000000000000000000ULL)
    return 19;
  return 20;
}

namespace detail {
template <typename T>
struct EndianAdapter final
    : public FormatAdapter<support::detail::packed_endian_specific_integral<
          T, support::little, support::unaligned>> {
  using EndianType =
      support::detail::packed_endian_specific_integral<T, support::little,
                                                       support::unaligned>;

  explicit EndianAdapter(EndianType &&Item)
      : FormatAdapter<EndianType>(std::move(Item)) {}

  void format(llvm::raw_ostream &Stream, StringRef Style) {
    format_provider<T>::format(static_cast<T>(this->Item), Stream, Style);
  }
};
} // namespace detail

template <typename T>
detail::EndianAdapter<T>
fmtle(support::detail::packed_endian_specific_integral<T, support::little,
                                                       support::unaligned>
          Value) {
  return detail::EndianAdapter<T>(std::move(Value));
}
}
} // namespace llvm
#endif
