// base/kaldi-utils.h

// Copyright 2009-2011  Ondrej Glembek;  Microsoft Corporation;
//                      Saarland University;  Karel Vesely;  Yanmin Qian

// See ../../COPYING for clarification regarding multiple authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
// MERCHANTABLITY OR NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing permissions and
// limitations under the License.

#ifndef KALDI_BASE_KALDI_UTILS_H_
#define KALDI_BASE_KALDI_UTILS_H_ 1

#if defined(_MSC_VER)
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX
#include <windows.h>
#endif

#ifdef _MSC_VER
#include <stdio.h>
#define unlink _unlink
#else
#include <unistd.h>
#endif

#include <limits>
#include <string>

#if defined(_MSC_VER)
#pragma warning(disable : 4244 4056 4305 4800 4267 4996 4756 4661)
#if _MSC_VER < 1400
#define __restrict__
#else
#define __restrict__ __restrict
#endif
#endif

#if defined(_MSC_VER)
#define KALDI_MEMALIGN(align, size, pp_orig) \
  (*(pp_orig) = _aligned_malloc(size, align))
#define KALDI_MEMALIGN_FREE(x) _aligned_free(x)
#elif defined(__CYGWIN__)
#define KALDI_MEMALIGN(align, size, pp_orig) \
  (*(pp_orig) = aligned_alloc(align, size))
#define KALDI_MEMALIGN_FREE(x) free(x)
#else
#define KALDI_MEMALIGN(align, size, pp_orig) \
  (!posix_memalign(pp_orig, align, size) ? *(pp_orig) : NULL)
#define KALDI_MEMALIGN_FREE(x) free(x)
#endif

#ifdef __ICC
#pragma warning(disable : 383)   // ICPC remark we don't want.
#pragma warning(disable : 810)   // ICPC remark we don't want.
#pragma warning(disable : 981)   // ICPC remark we don't want.
#pragma warning(disable : 1418)  // ICPC remark we don't want.
#pragma warning(disable : 444)   // ICPC remark we don't want.
#pragma warning(disable : 869)   // ICPC remark we don't want.
#pragma warning(disable : 1287)  // ICPC remark we don't want.
#pragma warning(disable : 279)   // ICPC remark we don't want.
#pragma warning(disable : 981)   // ICPC remark we don't want.
#endif

namespace kaldi {

// CharToString prints the character in a human-readable form, for debugging.
std::string CharToString(const char& c);

inline int MachineIsLittleEndian() {
  int check = 1;
  return (*reinterpret_cast<char*>(&check) != 0);
}

// This function kaldi::Sleep() provides a portable way
// to sleep for a possibly fractional
// number of seconds.  On Windows it's only accurate to microseconds.
void Sleep(float seconds);
}  // namespace kaldi

#define KALDI_SWAP8(a)                                                   \
  do {                                                                   \
    int t = (reinterpret_cast<char*>(&a))[0];                            \
    (reinterpret_cast<char*>(&a))[0] = (reinterpret_cast<char*>(&a))[7]; \
    (reinterpret_cast<char*>(&a))[7] = t;                                \
    t = (reinterpret_cast<char*>(&a))[1];                                \
    (reinterpret_cast<char*>(&a))[1] = (reinterpret_cast<char*>(&a))[6]; \
    (reinterpret_cast<char*>(&a))[6] = t;                                \
    t = (reinterpret_cast<char*>(&a))[2];                                \
    (reinterpret_cast<char*>(&a))[2] = (reinterpret_cast<char*>(&a))[5]; \
    (reinterpret_cast<char*>(&a))[5] = t;                                \
    t = (reinterpret_cast<char*>(&a))[3];                                \
    (reinterpret_cast<char*>(&a))[3] = (reinterpret_cast<char*>(&a))[4]; \
    (reinterpret_cast<char*>(&a))[4] = t;                                \
  } while (0)
#define KALDI_SWAP4(a)                                                   \
  do {                                                                   \
    int t = (reinterpret_cast<char*>(&a))[0];                            \
    (reinterpret_cast<char*>(&a))[0] = (reinterpret_cast<char*>(&a))[3]; \
    (reinterpret_cast<char*>(&a))[3] = t;                                \
    t = (reinterpret_cast<char*>(&a))[1];                                \
    (reinterpret_cast<char*>(&a))[1] = (reinterpret_cast<char*>(&a))[2]; \
    (reinterpret_cast<char*>(&a))[2] = t;                                \
  } while (0)
#define KALDI_SWAP2(a)                                                   \
  do {                                                                   \
    int t = (reinterpret_cast<char*>(&a))[0];                            \
    (reinterpret_cast<char*>(&a))[0] = (reinterpret_cast<char*>(&a))[1]; \
    (reinterpret_cast<char*>(&a))[1] = t;                                \
  } while (0)

// Makes copy constructor and operator= private.
#define KALDI_DISALLOW_COPY_AND_ASSIGN(type) \
  type(const type&);                         \
  void operator=(const type&)

template <bool B>
class KaldiCompileTimeAssert {};
template <>
class KaldiCompileTimeAssert<true> {
 public:
  static inline void Check() {}
};

#define KALDI_COMPILE_TIME_ASSERT(b) KaldiCompileTimeAssert<(b)>::Check()

#define KALDI_ASSERT_IS_INTEGER_TYPE(I)                            \
  KaldiCompileTimeAssert<std::numeric_limits<I>::is_specialized && \
                         std::numeric_limits<I>::is_integer>::Check()

#define KALDI_ASSERT_IS_FLOATING_TYPE(F)                           \
  KaldiCompileTimeAssert<std::numeric_limits<F>::is_specialized && \
                         !std::numeric_limits<F>::is_integer>::Check()

#if defined(_MSC_VER)
#define KALDI_STRCASECMP _stricmp
#elif defined(__CYGWIN__)
#include <strings.h>
#define KALDI_STRCASECMP strcasecmp
#else
#define KALDI_STRCASECMP strcasecmp
#endif
#ifdef _MSC_VER
#define KALDI_STRTOLL(cur_cstr, end_cstr) _strtoi64(cur_cstr, end_cstr, 10);
#else
#define KALDI_STRTOLL(cur_cstr, end_cstr) strtoll(cur_cstr, end_cstr, 10);
#endif

#endif  // KALDI_BASE_KALDI_UTILS_H_
