serialization.hpp

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#pragma once
#include <vector>
#include "container_types.hpp"
#include "unordered_dense.h"
#include "text.hpp"
#include "simple_fs.hpp"
 
namespace sys {
 
template<typename T>
inline size_t serialize_size(std::vector<T> const& vec) {
    return sizeof(uint32_t) + sizeof(T) * vec.size();
}
 
template<typename T>
inline uint8_t* serialize(uint8_t* ptr_in, std::vector<T> const& vec) {
    uint32_t length = uint32_t(vec.size());
    memcpy(ptr_in, &length, sizeof(uint32_t));
    memcpy(ptr_in + sizeof(uint32_t), vec.data(), sizeof(T) * vec.size());
    return ptr_in + sizeof(uint32_t) + sizeof(T) * vec.size();
}
 
template<typename T>
inline uint8_t const* deserialize(uint8_t const* ptr_in, std::vector<T>& vec) {
    uint32_t length = 0;
    memcpy(&length, ptr_in, sizeof(uint32_t));
    vec.resize(length);
    memcpy(vec.data(), ptr_in + sizeof(uint32_t), sizeof(T) * length);
    return ptr_in + sizeof(uint32_t) + sizeof(T) * length;
}
 
template<typename T>
inline uint8_t* memcpy_serialize(uint8_t* ptr_in, T const& obj) {
    memcpy(ptr_in, &obj, sizeof(T));
    return ptr_in + sizeof(T);
}
 
template<typename T>
inline uint8_t const* memcpy_deserialize(uint8_t const* ptr_in, T& obj) {
    memcpy(&obj, ptr_in, sizeof(T));
    return ptr_in + sizeof(T);
}
 
template<typename T, typename tag_type>
inline size_t serialize_size(tagged_vector<T, tag_type> const& vec) {
    return sizeof(uint32_t) + sizeof(T) * vec.size();
}
 
template<typename T, typename tag_type>
inline uint8_t* serialize(uint8_t* ptr_in, tagged_vector<T, tag_type> const& vec) {
    uint32_t length = uint32_t(vec.size());
    memcpy(ptr_in, &length, sizeof(uint32_t));
    memcpy(ptr_in + sizeof(uint32_t), vec.data(), sizeof(T) * vec.size());
    return ptr_in + sizeof(uint32_t) + sizeof(T) * vec.size();
}
 
template<typename T, typename tag_type>
inline uint8_t const* deserialize(uint8_t const* ptr_in, tagged_vector<T, tag_type>& vec) {
    uint32_t length = 0;
    memcpy(&length, ptr_in, sizeof(uint32_t));
    vec.resize(length);
    memcpy(vec.data(), ptr_in + sizeof(uint32_t), sizeof(T) * length);
    return ptr_in + sizeof(uint32_t) + sizeof(T) * length;
}
 
inline size_t serialize_size(
        ankerl::unordered_dense::map<dcon::text_key, uint32_t, text::vector_backed_ci_hash, text::vector_backed_ci_eq> const&
                vec) {
    return serialize_size(vec.values());
}
 
inline size_t serialize_size(
        ankerl::unordered_dense::set<dcon::text_key, text::vector_backed_ci_hash, text::vector_backed_ci_eq> const&
                vec) {
    return serialize_size(vec.values());
}
 
inline uint8_t* serialize(uint8_t* ptr_in,
        ankerl::unordered_dense::map<dcon::text_key, uint32_t, text::vector_backed_ci_hash, text::vector_backed_ci_eq> const&
                vec) {
    return serialize(ptr_in, vec.values());
}
inline uint8_t* serialize(uint8_t* ptr_in,
        ankerl::unordered_dense::set<dcon::text_key, text::vector_backed_ci_hash, text::vector_backed_ci_eq> const&
                vec) {
    return serialize(ptr_in, vec.values());
}
inline uint8_t const* deserialize(uint8_t const* ptr_in,
        ankerl::unordered_dense::map<dcon::text_key, uint32_t, text::vector_backed_ci_hash, text::vector_backed_ci_eq>& vec) {
    uint32_t length = 0;
    memcpy(&length, ptr_in, sizeof(uint32_t));
 
    std::remove_cvref_t<decltype(vec.values())> new_vec;
    new_vec.resize(length);
    memcpy(new_vec.data(), ptr_in + sizeof(uint32_t), sizeof(vec.values()[0]) * length);
    vec.replace(std::move(new_vec));
 
    return ptr_in + sizeof(uint32_t) + sizeof(vec.values()[0]) * length;
}
inline uint8_t const* deserialize(uint8_t const* ptr_in,
        ankerl::unordered_dense::set<dcon::text_key, text::vector_backed_ci_hash, text::vector_backed_ci_eq>& vec) {
    uint32_t length = 0;
    memcpy(&length, ptr_in, sizeof(uint32_t));
 
    std::remove_cvref_t<decltype(vec.values())> new_vec;
    new_vec.resize(length);
    memcpy(new_vec.data(), ptr_in + sizeof(uint32_t), sizeof(vec.values()[0]) * length);
    vec.replace(std::move(new_vec));
 
    return ptr_in + sizeof(uint32_t) + sizeof(vec.values()[0]) * length;
}
 
inline size_t serialize_size(
        ankerl::unordered_dense::map<dcon::modifier_id, dcon::gfx_object_id, sys::modifier_hash> const& vec) {
    return serialize_size(vec.values());
}
 
inline uint8_t* serialize(uint8_t* ptr_in,
        ankerl::unordered_dense::map<dcon::modifier_id, dcon::gfx_object_id, sys::modifier_hash> const& vec) {
    return serialize(ptr_in, vec.values());
}
inline uint8_t const* deserialize(uint8_t const* ptr_in,
        ankerl::unordered_dense::map<dcon::modifier_id, dcon::gfx_object_id, sys::modifier_hash>& vec) {
    uint32_t length = 0;
    memcpy(&length, ptr_in, sizeof(uint32_t));
 
    std::remove_cvref_t<decltype(vec.values())> new_vec;
    new_vec.resize(length);
    memcpy(new_vec.data(), ptr_in + sizeof(uint32_t), sizeof(vec.values()[0]) * length);
    vec.replace(std::move(new_vec));
 
    return ptr_in + sizeof(uint32_t) + sizeof(vec.values()[0]) * length;
}
 
inline size_t serialize_size(ankerl::unordered_dense::map<uint16_t, dcon::text_key> const& vec) {
    return serialize_size(vec.values());
}
 
inline uint8_t* serialize(uint8_t* ptr_in, ankerl::unordered_dense::map<uint16_t, dcon::text_key> const& vec) {
    return serialize(ptr_in, vec.values());
}
inline uint8_t const* deserialize(uint8_t const* ptr_in, ankerl::unordered_dense::map<uint16_t, dcon::text_key>& vec) {
    uint32_t length = 0;
    memcpy(&length, ptr_in, sizeof(uint32_t));
 
    std::remove_cvref_t<decltype(vec.values())> new_vec;
    new_vec.resize(length);
    memcpy(new_vec.data(), ptr_in + sizeof(uint32_t), sizeof(vec.values()[0]) * length);
    vec.replace(std::move(new_vec));
 
    return ptr_in + sizeof(uint32_t) + sizeof(vec.values()[0]) * length;
}
 
constexpr inline uint32_t save_file_version = 42;
constexpr inline uint32_t scenario_file_version = 135 + save_file_version;
 
struct scenario_header {
    uint32_t version = scenario_file_version;
    uint32_t count = 0;
    uint64_t timestamp = 0;
    checksum_key checksum;
};
 
struct save_header {
    uint32_t version = save_file_version;
    uint32_t count = 0;
    uint64_t timestamp = 0;
    checksum_key checksum;
    dcon::national_identity_id tag;
    dcon::government_type_id cgov;
    sys::date d;
    char save_name[32];
};
 
struct mod_identifier {
    native_string mod_path;
    uint64_t timestamp = 0;
    uint32_t count = 0;
};
 
void read_mod_path(uint8_t const* ptr_in, uint8_t const* lim, native_string& path_out);
uint8_t const* load_mod_path(uint8_t const* ptr_in, sys::state& state);
uint8_t* write_mod_path(uint8_t* ptr_in, native_string const& path_in);
size_t sizeof_mod_path(native_string const& path_in);
 
uint8_t const* read_scenario_header(uint8_t const* ptr_in, scenario_header& header_out);
uint8_t const* read_save_header(uint8_t const* ptr_in, save_header& header_out);
uint8_t* write_scenario_header(uint8_t* ptr_in, scenario_header const& header_in);
uint8_t* write_save_header(uint8_t* ptr_in, save_header const& header_in);
size_t sizeof_scenario_header(scenario_header const& header_in);
size_t sizeof_save_header(save_header const& header_in);
 
mod_identifier extract_mod_information(uint8_t const* ptr_in, uint64_t file_size);
 
uint8_t* write_compressed_section(uint8_t* ptr_out, uint8_t const* ptr_in, uint32_t uncompressed_size);
 
// Note: these functions are for read / writing the *uncompressed* data
uint8_t const* read_scenario_section(uint8_t const* ptr_in, uint8_t const* section_end, sys::state& state);
uint8_t const* read_save_section(uint8_t const* ptr_in, uint8_t const* section_end, sys::state& state);
uint8_t* write_scenario_section(uint8_t* ptr_in, sys::state& state);
uint8_t* write_save_section(uint8_t* ptr_in, sys::state& state);
struct scenario_size {
    size_t total_size;
    size_t checksum_offset;
};
scenario_size sizeof_scenario_section(sys::state& state);
size_t sizeof_save_section(sys::state& state);
 
void write_scenario_file(sys::state& state, native_string_view name, uint32_t count);
bool try_read_scenario_file(sys::state& state, native_string_view name);
bool try_read_scenario_and_save_file(sys::state& state, native_string_view name);
bool try_read_scenario_as_save_file(sys::state& state, native_string_view name);
 
void write_save_file(sys::state& state, sys::save_type type = sys::save_type::normal, std::string const& name = std::string(""));
bool try_read_save_file(sys::state& state, native_string_view name);
 
} // namespace sys