/***************************************************************************************************
 * Copyright (c) 2023 - 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 **************************************************************************************************/
#pragma once

#include <cute/config.hpp>

#include <cute/util/type_traits.hpp>
#include <cute/numeric/integral_constant.hpp>

//
// CUDA compatible print and printf
//

namespace cute
{

CUTE_HOST_DEVICE
int
num_digits(int x)
{
  return (x < 10 ? 1 :
          (x < 100 ? 2 :
           (x < 1000 ? 3 :
            (x < 10000 ? 4 :
             (x < 100000 ? 5 :
              (x < 1000000 ? 6 :
               (x < 10000000 ? 7 :
                (x < 100000000 ? 8 :
                 (x < 1000000000 ? 9 :
                  10)))))))));
}

template <class T>
struct format_and_size {
  using type = T;
  char const* format;
  int digits;
};

CUTE_HOST_DEVICE
format_and_size<int>
get_format(bool) {
  return {"%*d", 3};
}

CUTE_HOST_DEVICE
format_and_size<int32_t>
get_format(int32_t) {
  return {"%*d", 5};
}

CUTE_HOST_DEVICE
format_and_size<uint32_t>
get_format(uint32_t) {
  return {"%*d", 5};
}

CUTE_HOST_DEVICE
format_and_size<int64_t>
get_format(int64_t) {
  return {"%*d", 5};
}

CUTE_HOST_DEVICE
format_and_size<uint64_t>
get_format(uint64_t) {
  return {"%*d", 5};
}

CUTE_HOST_DEVICE
format_and_size<float>
get_format(half_t) {
  return {"%*.2f", 8};
}

CUTE_HOST_DEVICE
format_and_size<float>
get_format(float) {
  return {"%*.2e", 10};
}

CUTE_HOST_DEVICE
format_and_size<double>
get_format(double) {
  return {"%*.3e", 11};
}

//
// print dispatcher
//

CUTE_HOST_DEVICE
void
print(char const& c) {
  printf("%c", c);
}

template <class T,
          __CUTE_REQUIRES(is_std_integral<T>::value)>
CUTE_HOST_DEVICE
void
print(T const& a) {
  printf("%d", int(a));
}

template <class... T>
CUTE_HOST_DEVICE
void
print(char const* format, T const&... t) {
  printf(format, t...);
}

template <class... T>
CUTE_HOST_DEVICE
void
print(T const&... t) {
  (print(t), ...);
}

CUTE_HOST_DEVICE
void
print(char const* format) {
  printf("%s", format);
}

} // end namespace cute