#include "file.h"

#include <fstream>

namespace fs = std::filesystem;

using namespace std::string_literals;

std::string Reichwein::File::getFile(const fs::path& filename)
{
 std::ifstream file(filename.string(), std::ios::in | std::ios::binary);

 if (file.is_open()) {
  file.seekg(0, std::ios::end);
  std::ifstream::pos_type fileSize = file.tellg();
  if (fileSize < 0) { // on pseudo-files (e.g. /proc/*), this doesn't work. Use a slower workaround:
   std::stringstream buffer;
   buffer << file.rdbuf();
   return buffer.str();
  }
  file.seekg(0, std::ios::beg);

  std::string bytes(fileSize, ' ');
  file.read(reinterpret_cast<char*>(bytes.data()), fileSize);

  return bytes;

 } else {
  throw std::runtime_error("Opening "s + filename.string() + " for reading");
 }
}

void Reichwein::File::setFile(const fs::path& filename, const std::string& s)
{
 Reichwein::File::setFile(filename, s.data(), s.size());
}

void Reichwein::File::setFile(const fs::path& filename, const char* data, size_t size)
{
 std::ofstream file(filename.string(), std::ios::out | std::ios::binary);
 if (file.is_open()) {
  file.write(data, size);
 } else {
  throw std::runtime_error("Opening "s + filename.string() + " for writing");
 }
}

void Reichwein::File::setFile(const fs::path& filename, const std::vector<uint8_t>& data)
{
 Reichwein::File::setFile(filename, reinterpret_cast<const char*>(data.data()), data.size());
}