env.hpp

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#pragma once
 
#include <string>
#include <filesystem>
 
#include "../std/expected.hpp"
#include "../macro.hpp"
#include "reserved.hpp"

namespace ns_reserved::ns_env
{
 
namespace
{
 
namespace fs = std::filesystem;
 
}

inline Value<void> write(fs::path const& path_file_binary, std::string_view const& json)
{
  uint64_t space_available = ns_reserved::FIM_RESERVED_OFFSET_ENVIRONMENT_END - ns_reserved::FIM_RESERVED_OFFSET_ENVIRONMENT_BEGIN;
  uint64_t space_required = json.size();
  return_if(space_available <= space_required, Error("E::Not enough space to fit json data"));
  Pop(ns_reserved::write(path_file_binary
    , FIM_RESERVED_OFFSET_ENVIRONMENT_BEGIN
    , FIM_RESERVED_OFFSET_ENVIRONMENT_END
    , json.data()
    , json.size()
  ), "E::Failed to write data to {}", path_file_binary);
  return {};
}

inline Value<std::string> read(fs::path const& path_file_binary)
{
  uint64_t offset_begin = ns_reserved::FIM_RESERVED_OFFSET_ENVIRONMENT_BEGIN;
  uint64_t size = ns_reserved::FIM_RESERVED_OFFSET_ENVIRONMENT_END - offset_begin;
  auto buffer = std::make_unique<char[]>(size);
  Pop(ns_reserved::read(path_file_binary, offset_begin, buffer.get(), size)
    , "E::Failed to read binary data from {}", path_file_binary
  );
  return buffer.get();
}
 
} // namespace ns_reserved::ns_env
 
/* vim: set expandtab fdm=marker ts=2 sw=2 tw=100 et :*/