/*
 * Copyright (c) 2022-2024, NVIDIA CORPORATION.  All rights reserved.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "tensorrt_llm/common/stringUtils.h"

#include <cerrno>
#include <cstdarg>
#include <cstring>
#include <iostream>
#include <string>

#include "tensorrt_llm/common/assert.h"

namespace tensorrt_llm::common {

void fmtstr_(char const* format, fmtstr_allocator alloc, void* target, va_list args) {
  va_list args0;
  va_copy(args0, args);

  size_t constexpr init_size = 2048;
  char fixed_buffer[init_size];
  auto const size = std::vsnprintf(fixed_buffer, init_size, format, args0);
  TLLM_CHECK_WITH_INFO(size >= 0, std::string(std::strerror(errno)));
  if (size == 0) {
    return;
  }

  auto* memory = alloc(target, size);

  if (static_cast<size_t>(size) < init_size) {
    std::memcpy(memory, fixed_buffer, size + 1);
  } else {
    auto const size2 = std::vsnprintf(memory, size + 1, format, args);
    TLLM_CHECK_WITH_INFO(size2 == size, std::string(std::strerror(errno)));
  }
}

std::unordered_set<std::string> str2set(std::string const& input, char delimiter) {
  std::unordered_set<std::string> values;
  if (!input.empty()) {
    std::stringstream valStream(input);
    std::string val;
    while (std::getline(valStream, val, delimiter)) {
      if (!val.empty()) {
        values.insert(val);
      }
    }
  }
  return values;
};

}  // namespace tensorrt_llm::common