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/*
C++20 interface for nissy.
TODO: add more documentation (here and in README.md)
*/
#include "./nissy.h"
extern "C" {
long long nissy_compose(const char *, const char *, char *);
long long nissy_inverse(const char *, char *);
long long nissy_applymoves(const char *, const char *, char *);
long long nissy_applytrans(const char *, const char *, char *);
long long nissy_convert(const char *, const char *, const char *,
unsigned, char *);
long long nissy_getcube(long long, long long, long long, long long,
const char *, char *);
long long nissy_solverinfo(const char *, char *);
long long nissy_gendata(const char *, unsigned long long, char *);
long long nissy_checkdata(unsigned long long, const char *);
long long nissy_solve(const char *, const char *, unsigned, unsigned,
unsigned, unsigned, int, int, unsigned long long, const char *,
unsigned, char *, long long *);
long long nissy_countmoves(const char *);
long long nissy_setlogger(void (*)(const char *));
}
namespace nissy {
namespace utils {
void fixstr(std::string& str)
{
size_t n = str.find('\0');
str.resize(n);
}
std::variant<cube_t, error_t>
cube_or_error(const char *r, long long e)
{
if (e < 0)
return error_t{e};
return cube_t{r};
}
std::variant<std::string, error_t>
string_or_error(const char *cstr, long long e)
{
if (e < 0)
return error_t{e};
std::string str{cstr};
fixstr(str);
return str;
}
std::function<void(const char *)>
char_str_fn(std::function<void(std::string&)> f)
{
return [&](const char *cc){
std::string str{cc};
f(str);
};
}
}
std::variant<cube_t, error_t>
compose(const cube_t& cube, const cube_t& permutation)
{
char result[size::B32];
auto error = nissy_compose(cube.value.c_str(),
permutation.value.c_str(), result);
return utils::cube_or_error(result, error);
}
std::variant<cube_t, error_t>
inverse(const cube_t& cube)
{
char result[size::B32];
auto error = nissy_inverse(cube.value.c_str(), result);
return utils::cube_or_error(result, error);
}
std::variant<cube_t, error_t>
applymoves(const cube_t& cube, const moves_t& moves)
{
char result[size::B32];
auto error = nissy_applymoves(cube.value.c_str(),
moves.value.c_str(), result);
return utils::cube_or_error(result, error);
}
std::variant<cube_t, error_t>
applytrans(const cube_t& cube, const trans_t& trans)
{
char result[size::B32];
auto error = nissy_applytrans(cube.value.c_str(),
trans.value.c_str(), result);
return utils::cube_or_error(result, error);
}
std::variant<std::string, error_t>
convert(const cube_format_t& format_in,
const cube_format_t& format_out, const std::string& cube_string)
{
char result[size::CUBE_MAX];
auto error = nissy_convert(format_in.value.c_str(),
format_out.value.c_str(), cube_string.c_str(),
size::CUBE_MAX, result);
return utils::string_or_error(result, error);
}
std::variant<cube_t, error_t>
getcube(long long ep, long long eo, long long cp, long long co,
const std::string& options)
{
char result[size::B32];
auto error = nissy_getcube(ep, eo, cp, co, options.c_str(),
result);
return utils::cube_or_error(result, error);
}
std::variant<std::pair<size_t, std::string>, error_t>
solverinfo(const solver_t& solver)
{
char dataid[size::DATAID];
auto error = nissy_solverinfo(solver.value.c_str(), dataid);
if (error < 0)
return error_t{error};
return std::pair{error, dataid};
}
std::variant<solver_data_t, error_t>
gendata(const solver_t& solver)
{
char dataid[size::DATAID];
auto error = nissy_solverinfo(solver.value.c_str(), dataid);
if (error < 0)
return error_t{error};
size_t sz = error;
std::vector<std::byte> buffer(sz);
error = nissy_gendata(solver.value.c_str(), sz,
reinterpret_cast<char *>(buffer.data()));
if (error < 0)
return error_t{error};
return solver_data_t{buffer};
}
std::optional<error_t>
checkdata(const solver_data_t& data)
{
auto error = nissy_checkdata(data.value.size(),
reinterpret_cast<const char *>(data.value.data()));
if (error < 0)
return error_t{error};
return std::nullopt;
}
std::variant<solve_result_t, error_t>
solve(const cube_t& cube, const solver_t& solver,
nissflag_t niss, unsigned minmoves, unsigned maxmoves,
unsigned maxsolutions, int optimal, int threads,
const solver_data_t& data)
{
const size_t len = 3 * (maxmoves+1) * maxsolutions;
char csols[len];
long long cstats[size::SOLVE_STATS];
auto error = nissy_solve(cube.value.c_str(),
solver.value.c_str(), niss.value, minmoves, maxmoves,
maxsolutions, optimal, threads, data.value.size(),
reinterpret_cast<const char *>(data.value.data()),
len, csols, cstats);
if (error < 0)
return error_t{error};
std::vector<std::string> sols;
std::string_view strsols(csols);
for (auto r : strsols | std::views::split('\n'))
sols.push_back(std::string{r.begin(), r.end()});
return solve_result_t{sols, std::to_array(cstats)};
}
std::variant<unsigned, error_t>
countmoves(const moves_t& moves)
{
auto error = nissy_countmoves(moves.value.c_str());
if (error < 0)
return error_t{error};
return (unsigned)error;
}
void setlogger(std::function<void(std::string&)> log)
{
nissy_setlogger(
utils::char_str_fn(log).target<void(const char *)>());
}
}
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