src/base/flags.h

// Copyright 2010-2015, Google Inc.
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// This is a simple port of google flags

#ifndef MOZC_BASE_FLAGS_H_
#define MOZC_BASE_FLAGS_H_


#include <string>
#include "base/port.h"

namespace mozc_flags {

enum { I, B, I64, U64, D, S };

struct Flag;

class FlagRegister {
 public:
  FlagRegister(const char *name,
               void *storage,
               const void *default_storage,
               int shorttpe,
               const char *help);
  virtual ~FlagRegister();
 private:
  Flag *flag_;
};

uint32 ParseCommandLineFlags(int *argc, char*** argv,
                             bool remove_flags);
}  // mozc_flags

void InitGoogle(const char *arg0,
                int *argc, char ***argv,
                bool remove_flags);

#define DEFINE_VARIABLE(type, shorttype, name, value, help) \
namespace mozc_flags_fL##shorttype { \
  using namespace mozc_flags; \
  type FLAGS_##name = value; \
  static const type FLAGS_DEFAULT_##name = value; \
  static const mozc_flags::FlagRegister \
  fL##name(#name,                                                       \
           reinterpret_cast<void *>(&FLAGS_##name),                     \
           reinterpret_cast<const void *>(&FLAGS_DEFAULT_##name),       \
           shorttype, help);                                            \
} \
using mozc_flags_fL##shorttype::FLAGS_##name

#define DECLARE_VARIABLE(type, shorttype, name)      \
namespace mozc_flags_fL##shorttype {                 \
  extern type FLAGS_##name;                          \
}                                                    \
using mozc_flags_fL##shorttype::FLAGS_##name

#define DEFINE_int32(name, value, help) \
DEFINE_VARIABLE(int32, I, name, value, help)
#define DECLARE_int32(name) \
DECLARE_VARIABLE(int32, I, name)

#define DEFINE_int64(name, value, help)  \
DEFINE_VARIABLE(int64, I64, name, value, help)
#define DECLARE_int64(name) \
DECLARE_VARIABLE(int64, I64, name)

#define DEFINE_uint64(name, value, help) \
DEFINE_VARIABLE(uint64, U64, name, value, help)
#define DECLARE_uint64(name) \
DECLARE_VARIABLE(uint64, U64, name)

#define DEFINE_double(name, value, help) \
DEFINE_VARIABLE(double, D, name, value, help)
#define DECLARE_double(name) \
DECLARE_VARIABLE(double, D, name)

#define DEFINE_bool(name, value, help)    \
DEFINE_VARIABLE(bool, B, name, value, help)
#define DECLARE_bool(name) \
DECLARE_VARIABLE(bool, B, name)

#define DEFINE_string(name, value, help)  \
DEFINE_VARIABLE(string, S, name, value, help)
#define DECLARE_string(name) \
DECLARE_VARIABLE(string, S, name)

#endif  // MOZC_BASE_FLAGS_H_