utils.hpp

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/* Copyright 2017 - 2024 R. Thomas
 * Copyright 2017 - 2024 Quarkslab
 *
 * 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.
 */
#ifndef LIEF_UTILS_HEADER
#define LIEF_UTILS_HEADER
#include <string>
 
#include "LIEF/visibility.h"
 
#include "LIEF/errors.hpp"
 
namespace LIEF {
inline uint64_t align(uint64_t value, uint64_t align_on) {
  if (align_on == 0) {
    return value;
  }
  const auto r = value % align_on;
  if (r > 0) {
    return value + (align_on - r);
  }
  return value;
}
 
inline uint64_t align_down(uint64_t value, uint64_t align_on) {
  if (align_on == 0) {
    return value;
  }
  const auto r = value % align_on;
  if (r > 0) {
    return value - r;
  }
  return value;
}
 
template<typename T>
inline constexpr T round(T x) {
  return static_cast<T>(round<uint64_t>(x));
}
 
 
template<>
inline uint64_t round<uint64_t>(uint64_t x) {
  //From http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
  x--;
  x |= x >> 1;  // handle  2 bit numbers
  x |= x >> 2;  // handle  4 bit numbers
  x |= x >> 4;  // handle  8 bit numbers
  x |= x >> 8;  // handle 16 bit numbers
  x |= x >> 16; // handle 32 bit numbers
  x |= x >> 32; // handle 64 bit numbers
  x++;
  return x;
}
 
 
constexpr size_t operator ""_KB(unsigned long long kbs)
{
    return 1024LLU * kbs;
}
 
constexpr size_t operator ""_MB(unsigned long long mbs)
{
    return 1024LLU * 1024LLU * mbs;
}
 
constexpr size_t operator ""_GB(unsigned long long gbs)
{
    return 1024LLU * 1024LLU * 1024LLU * gbs;
}
LIEF_API std::string u16tou8(const std::u16string& string, bool remove_null_char = false);
LIEF_API result<std::u16string> u8tou16(const std::string& string);
LIEF_API bool is_extended();
LIEF_API std::string extended_version_info();
LIEF_API result<std::string> demangle(const std::string& mangled);
}
 
 
#endif