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#define FM_SERIALIZE_WORLD_IMPL
#include "world-impl.hpp"
#include "binary-reader.inl"
#include "src/world.hpp"
namespace floormat::Serialize {
namespace {
struct reader_state final {
explicit reader_state(world& world) noexcept;
void deserialize_world(ArrayView<const char> buf);
private:
std::shared_ptr<tile_atlas> lookup_atlas(atlasid id);
void read_atlases();
void read_chunks();
std::unordered_map<atlasid, std::shared_ptr<tile_atlas>> atlases;
struct world* world;
};
reader_state::reader_state(struct world& world) noexcept : world{&world} {}
void reader_state::deserialize_world(ArrayView<const char> buf)
{
auto s = binary_reader{buf};
if (!!::memcmp(s.read<std::size(file_magic)-1>().data(), file_magic, std::size(file_magic)-1))
fm_abort("bad magic");
}
} // namespace
} // namespace floormat::Serialize
namespace floormat {
world world::deserialize(StringView filename)
{
char errbuf[128];
constexpr auto strerror = []<std::size_t N> (char (&buf)[N]) -> const char* {
::strerror_s(buf, std::size(buf), errno);
return buf;
};
fm_assert(filename.flags() & StringViewFlag::NullTerminated);
FILE_raii f = ::fopen(filename.data(), "r");
if (!f)
fm_abort("fopen(\"%s\", \"r\"): %s", filename.data(), strerror(errbuf));
if (int ret = ::fseek(f, 0, SEEK_END); ret != 0)
fm_abort("fseek(\"%s\", 0, SEEK_END): %s", filename.data(), strerror(errbuf));
std::size_t len;
if (auto len_ = ::ftell(f); len_ >= 0)
len = (std::size_t)len_;
else
fm_abort("ftell(\"%s\"): %s", filename.data(), strerror(errbuf));
if (int ret = ::fseek(f, 0, SEEK_SET); ret != 0)
fm_abort("fseek(\"%s\", 0, SEEK_SET): %s", filename.data(), strerror(errbuf));
auto buf_ = std::make_unique<char[]>(len);
if (auto ret = ::fread(&buf_[0], len, 1, f); ret != 1)
fm_abort("fread(\"%s\", %zu): %s", filename.data(), len, strerror(errbuf));
world w;
Serialize::reader_state s{w};
s.deserialize_world({buf_.get(), len});
return w;
}
} // namespace floormat
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