libcubescript/src/cs_state.cc

787 lines
22 KiB
C++

#include <memory>
#include "cs_bcode.hh"
#include "cs_state.hh"
#include "cs_thread.hh"
#include "cs_strman.hh"
#include "cs_gen.hh" // FIXME, only MAX_ARGUMENTS
#include "cs_vm.hh" // break/continue, call_with_args
#include "cs_parser.hh"
namespace cubescript {
internal_state::internal_state(alloc_func af, void *data):
allocf{af}, aptr{data},
idents{allocator_type{this}},
identmap{allocator_type{this}},
varprintf{},
strman{create<string_pool>(this)},
empty{bcode_init_empty(this)}
{}
internal_state::~internal_state() {
bcode_free_empty(this, empty);
destroy(strman);
}
void *internal_state::alloc(void *ptr, size_t os, size_t ns) {
void *p = allocf(aptr, ptr, os, ns);
if (!p && ns) {
throw std::bad_alloc{};
}
return p;
}
static void *default_alloc(void *, void *p, size_t, size_t ns) {
if (!ns) {
std::free(p);
return nullptr;
}
return std::realloc(p, ns);
}
void init_lib_base(state &cs);
void init_lib_math(state &cs);
void init_lib_string(state &cs);
void init_lib_list(state &cs);
/* public interfaces */
state::state(): state{default_alloc, nullptr} {}
state::state(alloc_func func, void *data) {
command *p;
if (!func) {
func = default_alloc;
}
/* allocator is not set up yet, use func directly */
auto *statep = static_cast<internal_state *>(
func(data, nullptr, 0, sizeof(internal_state))
);
/* allocator will be set up in the constructor */
new (statep) internal_state{func, data};
try {
p_tstate = statep->create<thread_state>(statep);
} catch (...) {
statep->destroy(statep);
throw;
}
p_tstate->pstate = this;
p_tstate->istate = statep;
p_owner = true;
for (int i = 0; i < MAX_ARGUMENTS; ++i) {
char buf[32];
snprintf(buf, sizeof(buf), "arg%d", i + 1);
new_ident(static_cast<char const *>(buf), IDENT_FLAG_ARG);
}
ident *id = new_ident("//dummy");
if (id->get_index() != ID_IDX_DUMMY) {
throw internal_error{"invalid dummy index"};
}
id = new_ivar("numargs", MAX_ARGUMENTS, 0, 0);
if (id->get_index() != ID_IDX_NUMARGS) {
throw internal_error{"invalid numargs index"};
}
id = new_ivar("dbgalias", 0, 1000, 4);
if (id->get_index() != ID_IDX_DBGALIAS) {
throw internal_error{"invalid dbgalias index"};
}
p = new_command("do", "e", [](auto &cs, auto args, auto &res) {
cs.run(args[0].get_code(), res);
});
static_cast<command_impl *>(p)->p_type = ID_DO;
p = new_command("doargs", "e", [](auto &cs, auto args, auto &res) {
call_with_args(*cs.p_tstate, [&cs, &res, &args]() {
cs.run(args[0].get_code(), res);
});
});
static_cast<command_impl *>(p)->p_type = ID_DOARGS;
p = new_command("if", "tee", [](auto &cs, auto args, auto &res) {
cs.run((args[0].get_bool() ? args[1] : args[2]).get_code(), res);
});
static_cast<command_impl *>(p)->p_type = ID_IF;
p = new_command("result", "t", [](auto &, auto args, auto &res) {
res = std::move(args[0]);
});
static_cast<command_impl *>(p)->p_type = ID_RESULT;
p = new_command("!", "t", [](auto &, auto args, auto &res) {
res.set_int(!args[0].get_bool());
});
static_cast<command_impl *>(p)->p_type = ID_NOT;
p = new_command("&&", "E1V", [](auto &cs, auto args, auto &res) {
if (args.empty()) {
res.set_int(1);
} else {
for (size_t i = 0; i < args.size(); ++i) {
bcode *code = args[i].get_code();
if (code) {
cs.run(code, res);
} else {
res = std::move(args[i]);
}
if (!res.get_bool()) {
break;
}
}
}
});
static_cast<command_impl *>(p)->p_type = ID_AND;
p = new_command("||", "E1V", [](auto &cs, auto args, auto &res) {
if (args.empty()) {
res.set_int(0);
} else {
for (size_t i = 0; i < args.size(); ++i) {
bcode *code = args[i].get_code();
if (code) {
cs.run(code, res);
} else {
res = std::move(args[i]);
}
if (res.get_bool()) {
break;
}
}
}
});
static_cast<command_impl *>(p)->p_type = ID_OR;
p = new_command("local", "", nullptr);
static_cast<command_impl *>(p)->p_type = ID_LOCAL;
p = new_command("break", "", [](auto &cs, auto, auto &) {
if (cs.is_in_loop()) {
throw break_exception{};
} else {
throw error{cs, "no loop to break"};
}
});
static_cast<command_impl *>(p)->p_type = ID_BREAK;
p = new_command("continue", "", [](auto &cs, auto, auto &) {
if (cs.is_in_loop()) {
throw continue_exception{};
} else {
throw error{cs, "no loop to continue"};
}
});
static_cast<command_impl *>(p)->p_type = ID_CONTINUE;
init_lib_base(*this);
}
LIBCUBESCRIPT_EXPORT state::~state() {
destroy();
}
LIBCUBESCRIPT_EXPORT void state::destroy() {
if (!p_tstate || !p_owner) {
return;
}
auto *sp = p_tstate->istate;
for (auto &p: sp->idents) {
ident *i = p.second;
alias *a = i->get_alias();
if (a) {
a->get_value().force_none();
static_cast<alias_impl *>(a)->clean_code();
}
sp->destroy(i->p_impl);
}
sp->destroy(p_tstate);
sp->destroy(sp);
}
state::state(internal_state *s):
p_owner{false}
{
p_tstate = s->create<thread_state>(s);
p_tstate->istate = s;
}
LIBCUBESCRIPT_EXPORT state state::new_thread() {
return state{p_tstate->istate};
}
LIBCUBESCRIPT_EXPORT hook_func state::set_call_hook(hook_func func) {
return p_tstate->set_hook(std::move(func));
}
LIBCUBESCRIPT_EXPORT hook_func const &state::get_call_hook() const {
return p_tstate->get_hook();
}
LIBCUBESCRIPT_EXPORT hook_func &state::get_call_hook() {
return p_tstate->get_hook();
}
LIBCUBESCRIPT_EXPORT var_print_func state::set_var_printer(
var_print_func func
) {
auto fn = std::move(p_tstate->istate->varprintf);
p_tstate->istate->varprintf = std::move(func);
return fn;
}
LIBCUBESCRIPT_EXPORT var_print_func const &state::get_var_printer() const {
return p_tstate->istate->varprintf;
}
LIBCUBESCRIPT_EXPORT void state::print_var(global_var const &v) const {
if (p_tstate->istate->varprintf) {
p_tstate->istate->varprintf(*this, v);
}
}
LIBCUBESCRIPT_EXPORT void *state::alloc(void *ptr, size_t os, size_t ns) {
return p_tstate->istate->alloc(ptr, os, ns);
}
LIBCUBESCRIPT_EXPORT ident *state::add_ident(
ident *id, ident_impl *impl
) {
if (!id) {
return nullptr;
}
id->p_impl = impl;
p_tstate->istate->idents[id->get_name()] = id;
static_cast<ident_impl *>(impl)->p_index = p_tstate->istate->identmap.size();
p_tstate->istate->identmap.push_back(id);
return p_tstate->istate->identmap.back();
}
LIBCUBESCRIPT_EXPORT ident *state::new_ident(
std::string_view name, int flags
) {
ident *id = get_ident(name);
if (!id) {
if (!is_valid_name(name)) {
throw error{
*this, "number %s is not a valid identifier name", name.data()
};
}
auto *inst = p_tstate->istate->create<alias_impl>(
*this, string_ref{p_tstate->istate, name}, flags
);
id = add_ident(inst, inst);
}
return id;
}
LIBCUBESCRIPT_EXPORT ident *state::get_ident(std::string_view name) {
auto id = p_tstate->istate->idents.find(name);
if (id != p_tstate->istate->idents.end()) {
return id->second;
}
return nullptr;
}
LIBCUBESCRIPT_EXPORT alias *state::get_alias(std::string_view name) {
auto id = get_ident(name);
if (!id || !id->is_alias()) {
return nullptr;
}
return static_cast<alias *>(id);
}
LIBCUBESCRIPT_EXPORT bool state::have_ident(std::string_view name) {
return p_tstate->istate->idents.find(name) != p_tstate->istate->idents.end();
}
LIBCUBESCRIPT_EXPORT std::span<ident *> state::get_idents() {
return std::span<ident *>{
p_tstate->istate->identmap.data(),
p_tstate->istate->identmap.size()
};
}
LIBCUBESCRIPT_EXPORT std::span<ident const *> state::get_idents() const {
auto ptr = const_cast<ident const **>(p_tstate->istate->identmap.data());
return std::span<ident const *>{ptr, p_tstate->istate->identmap.size()};
}
LIBCUBESCRIPT_EXPORT integer_var *state::new_ivar(
std::string_view n, integer_type m, integer_type x, integer_type v,
var_cb_func f, int flags
) {
auto *iv = p_tstate->istate->create<ivar_impl>(
string_ref{p_tstate->istate, n}, m, x, v, std::move(f), flags
);
add_ident(iv, iv);
return iv;
}
LIBCUBESCRIPT_EXPORT float_var *state::new_fvar(
std::string_view n, float_type m, float_type x, float_type v,
var_cb_func f, int flags
) {
auto *fv = p_tstate->istate->create<fvar_impl>(
string_ref{p_tstate->istate, n}, m, x, v, std::move(f), flags
);
add_ident(fv, fv);
return fv;
}
LIBCUBESCRIPT_EXPORT string_var *state::new_svar(
std::string_view n, std::string_view v, var_cb_func f, int flags
) {
auto *sv = p_tstate->istate->create<svar_impl>(
string_ref{p_tstate->istate, n}, string_ref{p_tstate->istate, v},
string_ref{p_tstate->istate, ""}, std::move(f), flags
);
add_ident(sv, sv);
return sv;
}
LIBCUBESCRIPT_EXPORT void state::reset_var(std::string_view name) {
ident *id = get_ident(name);
if (!id) {
throw error{*this, "variable %s does not exist", name.data()};
}
if (id->get_flags() & IDENT_FLAG_READONLY) {
throw error{*this, "variable %s is read only", name.data()};
}
clear_override(*id);
}
LIBCUBESCRIPT_EXPORT void state::touch_var(std::string_view name) {
ident *id = get_ident(name);
if (id && id->is_var()) {
static_cast<var_impl *>(id->p_impl)->changed(*this);
}
}
LIBCUBESCRIPT_EXPORT void state::set_alias(
std::string_view name, any_value v
) {
ident *id = get_ident(name);
if (id) {
switch (id->get_type()) {
case ident_type::ALIAS: {
alias_impl *a = static_cast<alias_impl *>(id);
if (a->get_index() < MAX_ARGUMENTS) {
a->set_arg(*this, v);
} else {
a->set_alias(*this, v);
}
return;
}
case ident_type::IVAR:
set_var_int_checked(static_cast<integer_var *>(id), v.get_int());
break;
case ident_type::FVAR:
set_var_float_checked(static_cast<float_var *>(id), v.get_float());
break;
case ident_type::SVAR:
set_var_str_checked(static_cast<string_var *>(id), v.get_str());
break;
default:
throw error{
*this, "cannot redefine builtin %s with an alias",
id->get_name().data()
};
}
} else if (!is_valid_name(name)) {
throw error{*this, "cannot alias invalid name '%s'", name.data()};
} else {
auto *a = p_tstate->istate->create<alias_impl>(
*this, string_ref{p_tstate->istate, name}, std::move(v), identflags
);
add_ident(a, a);
}
}
LIBCUBESCRIPT_EXPORT command *state::new_command(
std::string_view name, std::string_view args, command_func func
) {
int nargs = 0;
for (auto fmt = args.begin(); fmt != args.end(); ++fmt) {
switch (*fmt) {
case 'i':
case 'b':
case 'f':
case 'F':
case 't':
case 'T':
case 'E':
case 'N':
case 's':
case 'e':
case 'r':
case '$':
if (nargs < MAX_ARGUMENTS) {
++nargs;
}
break;
case '1':
case '2':
case '3':
case '4':
if (nargs < (*fmt - '0')) {
return nullptr;
}
if ((args.end() - fmt) != 2) {
return nullptr;
}
if ((fmt[1] != 'C') && (fmt[1] != 'V')) {
return nullptr;
}
if (nargs < MAX_ARGUMENTS) {
fmt -= *fmt - '0' + 1;
}
break;
case 'C':
case 'V':
if ((fmt + 1) != args.end()) {
return nullptr;
}
break;
default:
return nullptr;
}
}
auto *cmd = p_tstate->istate->create<command_impl>(
string_ref{p_tstate->istate, name},
string_ref{p_tstate->istate, args},
nargs, std::move(func)
);
add_ident(cmd, cmd);
return cmd;
}
LIBCUBESCRIPT_EXPORT void state::clear_override(ident &id) {
if (!(id.get_flags() & IDENT_FLAG_OVERRIDDEN)) {
return;
}
switch (id.get_type()) {
case ident_type::ALIAS: {
alias_impl &a = static_cast<alias_impl &>(id);
a.clean_code();
a.get_value().set_str("");
break;
}
case ident_type::IVAR: {
ivar_impl &iv = static_cast<ivar_impl &>(id);
iv.set_value(iv.p_overrideval);
iv.changed(*this);
break;
}
case ident_type::FVAR: {
fvar_impl &fv = static_cast<fvar_impl &>(id);
fv.set_value(fv.p_overrideval);
fv.changed(*this);
break;
}
case ident_type::SVAR: {
svar_impl &sv = static_cast<svar_impl &>(id);
sv.set_value(sv.p_overrideval);
sv.changed(*this);
break;
}
default:
break;
}
id.p_impl->p_flags &= ~IDENT_FLAG_OVERRIDDEN;
}
LIBCUBESCRIPT_EXPORT void state::clear_overrides() {
for (auto &p: p_tstate->istate->idents) {
clear_override(*(p.second));
}
}
template<typename SF>
inline void override_var(state &cs, global_var *v, int &vflags, SF sf) {
if ((cs.identflags & IDENT_FLAG_OVERRIDDEN) || (vflags & IDENT_FLAG_OVERRIDE)) {
if (vflags & IDENT_FLAG_PERSIST) {
throw error{
cs, "cannot override persistent variable '%s'",
v->get_name().data()
};
}
if (!(vflags & IDENT_FLAG_OVERRIDDEN)) {
sf();
vflags |= IDENT_FLAG_OVERRIDDEN;
}
} else {
if (vflags & IDENT_FLAG_OVERRIDDEN) {
vflags &= ~IDENT_FLAG_OVERRIDDEN;
}
}
}
LIBCUBESCRIPT_EXPORT void state::set_var_int(
std::string_view name, integer_type v, bool dofunc, bool doclamp
) {
ident *id = get_ident(name);
if (!id || id->is_ivar()) {
return;
}
ivar_impl *iv = static_cast<ivar_impl *>(id);
override_var(
*this, iv, iv->p_flags,
[&iv]() { iv->p_overrideval = iv->get_value(); }
);
if (doclamp) {
iv->set_value(std::clamp(v, iv->get_val_min(), iv->get_val_max()));
} else {
iv->set_value(v);
}
if (dofunc) {
iv->changed(*this);
}
}
LIBCUBESCRIPT_EXPORT void state::set_var_float(
std::string_view name, float_type v, bool dofunc, bool doclamp
) {
ident *id = get_ident(name);
if (!id || id->is_fvar()) {
return;
}
fvar_impl *fv = static_cast<fvar_impl *>(id);
override_var(
*this, fv, fv->p_flags,
[&fv]() { fv->p_overrideval = fv->get_value(); }
);
if (doclamp) {
fv->set_value(std::clamp(v, fv->get_val_min(), fv->get_val_max()));
} else {
fv->set_value(v);
}
if (dofunc) {
fv->changed(*this);
}
}
LIBCUBESCRIPT_EXPORT void state::set_var_str(
std::string_view name, std::string_view v, bool dofunc
) {
ident *id = get_ident(name);
if (!id || id->is_svar()) {
return;
}
svar_impl *sv = static_cast<svar_impl *>(id);
override_var(
*this, sv, sv->p_flags,
[&sv]() { sv->p_overrideval = sv->get_value(); }
);
sv->set_value(string_ref{p_tstate->istate, v});
if (dofunc) {
sv->changed(*this);
}
}
LIBCUBESCRIPT_EXPORT std::optional<integer_type>
state::get_var_int(std::string_view name) {
ident *id = get_ident(name);
if (!id || id->is_ivar()) {
return std::nullopt;
}
return static_cast<integer_var *>(id)->get_value();
}
LIBCUBESCRIPT_EXPORT std::optional<float_type>
state::get_var_float(std::string_view name) {
ident *id = get_ident(name);
if (!id || id->is_fvar()) {
return std::nullopt;
}
return static_cast<float_var *>(id)->get_value();
}
LIBCUBESCRIPT_EXPORT std::optional<string_ref>
state::get_var_str(std::string_view name) {
ident *id = get_ident(name);
if (!id || id->is_svar()) {
return std::nullopt;
}
return string_ref{
p_tstate->istate, static_cast<string_var *>(id)->get_value()
};
}
LIBCUBESCRIPT_EXPORT std::optional<integer_type>
state::get_var_min_int(std::string_view name) {
ident *id = get_ident(name);
if (!id || id->is_ivar()) {
return std::nullopt;
}
return static_cast<integer_var *>(id)->get_val_min();
}
LIBCUBESCRIPT_EXPORT std::optional<integer_type>
state::get_var_max_int(std::string_view name) {
ident *id = get_ident(name);
if (!id || id->is_ivar()) {
return std::nullopt;
}
return static_cast<integer_var *>(id)->get_val_max();
}
LIBCUBESCRIPT_EXPORT std::optional<float_type>
state::get_var_min_float(std::string_view name) {
ident *id = get_ident(name);
if (!id || id->is_fvar()) {
return std::nullopt;
}
return static_cast<float_var *>(id)->get_val_min();
}
LIBCUBESCRIPT_EXPORT std::optional<float_type>
state::get_var_max_float(std::string_view name) {
ident *id = get_ident(name);
if (!id || id->is_fvar()) {
return std::nullopt;
}
return static_cast<float_var *>(id)->get_val_max();
}
LIBCUBESCRIPT_EXPORT std::optional<string_ref>
state::get_alias_val(std::string_view name) {
alias *a = get_alias(name);
if (!a) {
return std::nullopt;
}
if ((a->get_index() < MAX_ARGUMENTS) && !ident_is_used_arg(a, *this)) {
return std::nullopt;
}
return a->get_value().get_str();
}
integer_type clamp_var(state &cs, integer_var *iv, integer_type v) {
if (v < iv->get_val_min()) {
v = iv->get_val_min();
} else if (v > iv->get_val_max()) {
v = iv->get_val_max();
} else {
return v;
}
throw error{
cs,
(iv->get_flags() & IDENT_FLAG_HEX)
? (
(iv->get_val_min() <= 255)
? "valid range for '%s' is %d..0x%X"
: "valid range for '%s' is 0x%X..0x%X"
)
: "valid range for '%s' is %d..%d",
iv->get_name().data(), iv->get_val_min(), iv->get_val_max()
};
}
LIBCUBESCRIPT_EXPORT void state::set_var_int_checked(
integer_var *iv, integer_type v
) {
if (iv->get_flags() & IDENT_FLAG_READONLY) {
throw error{
*this, "variable '%s' is read only", iv->get_name().data()
};
}
ivar_impl *ivp = static_cast<ivar_impl *>(iv);
override_var(
*this, iv, ivp->p_flags,
[&ivp]() { ivp->p_overrideval = ivp->p_storage; }
);
if ((v < iv->get_val_min()) || (v > iv->get_val_max())) {
v = clamp_var(*this, iv, v);
}
iv->set_value(v);
ivp->changed(*this);
}
LIBCUBESCRIPT_EXPORT void state::set_var_int_checked(
integer_var *iv, std::span<any_value> args
) {
integer_type v = args[0].force_int();
if ((iv->get_flags() & IDENT_FLAG_HEX) && (args.size() > 1)) {
v = (v << 16) | (args[1].force_int() << 8);
if (args.size() > 2) {
v |= args[2].force_int();
}
}
set_var_int_checked(iv, v);
}
float_type clamp_fvar(state &cs, float_var *fv, float_type v) {
if (v < fv->get_val_min()) {
v = fv->get_val_min();
} else if (v > fv->get_val_max()) {
v = fv->get_val_max();
} else {
return v;
}
any_value vmin{cs}, vmax{cs};
vmin.set_float(fv->get_val_min());
vmax.set_float(fv->get_val_max());
throw error{
cs, "valid range for '%s' is %s..%s", fv->get_name().data(),
vmin.force_str(), vmax.force_str()
};
return v;
}
LIBCUBESCRIPT_EXPORT void state::set_var_float_checked(
float_var *fv, float_type v
) {
if (fv->get_flags() & IDENT_FLAG_READONLY) {
throw error{
*this, "variable '%s' is read only", fv->get_name().data()
};
}
fvar_impl *fvp = static_cast<fvar_impl *>(fv);
override_var(
*this, fv, fvp->p_flags,
[&fvp]() { fvp->p_overrideval = fvp->p_storage; }
);
if ((v < fv->get_val_min()) || (v > fv->get_val_max())) {
v = clamp_fvar(*this, fv, v);
}
fv->set_value(v);
fvp->changed(*this);
}
LIBCUBESCRIPT_EXPORT void state::set_var_str_checked(
string_var *sv, std::string_view v
) {
if (sv->get_flags() & IDENT_FLAG_READONLY) {
throw error{
*this, "variable '%s' is read only", sv->get_name().data()
};
}
svar_impl *svp = static_cast<svar_impl *>(sv);
override_var(
*this, sv, svp->p_flags,
[&svp]() { svp->p_overrideval = svp->p_storage; }
);
sv->set_value(string_ref{p_tstate->istate, v});
svp->changed(*this);
}
LIBCUBESCRIPT_EXPORT void state::init_libs(int libs) {
if (libs & LIB_MATH) {
init_lib_math(*this);
}
if (libs & LIB_STRING) {
init_lib_string(*this);
}
if (libs & LIB_LIST) {
init_lib_list(*this);
}
}
} /* namespace cubescript */