746 lines
21 KiB
C++
746 lines
21 KiB
C++
#include <memory>
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#include <cstdio>
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#include <cmath>
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#include "cs_bcode.hh"
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#include "cs_state.hh"
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#include "cs_thread.hh"
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#include "cs_strman.hh"
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#include "cs_vm.hh"
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#include "cs_parser.hh"
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#include "cs_error.hh"
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namespace cubescript {
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internal_state::internal_state(alloc_func af, void *data):
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allocf{af}, aptr{data},
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idents{allocator_type{this}},
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identmap{allocator_type{this}},
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strman{create<string_pool>(this)},
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empty{bcode_init_empty(this)}
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{}
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internal_state::~internal_state() {
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for (auto &p: idents) {
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destroy(&ident_p{*p.second}.impl());
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}
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bcode_free_empty(this, empty);
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destroy(strman);
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}
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void *internal_state::alloc(void *ptr, size_t os, size_t ns) {
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void *p = allocf(aptr, ptr, os, ns);
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if (!p && ns) {
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throw std::bad_alloc{};
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}
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return p;
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}
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static void *default_alloc(void *, void *p, size_t, size_t ns) {
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if (!ns) {
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std::free(p);
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return nullptr;
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}
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return std::realloc(p, ns);
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}
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ident *internal_state::add_ident(ident *id, ident_impl *impl) {
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if (!id) {
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return nullptr;
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}
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ident_p{*id}.impl(impl);
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idents[id->name()] = id;
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impl->p_index = int(identmap.size());
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identmap.push_back(id);
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return identmap.back();
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}
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ident &internal_state::new_ident(state &cs, std::string_view name, int flags) {
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ident *id = get_ident(name);
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if (!id) {
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if (!is_valid_name(name)) {
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throw error_p::make(
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cs, "'%s' is not a valid identifier name", name.data()
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);
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}
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auto *inst = create<alias_impl>(
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cs, string_ref{cs, name}, flags
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);
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id = add_ident(inst, inst);
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}
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return *id;
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}
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ident *internal_state::get_ident(std::string_view name) const {
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auto id = idents.find(name);
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if (id == idents.end()) {
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return nullptr;
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}
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return id->second;
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}
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/* public interfaces */
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state::state(): state{default_alloc, nullptr} {}
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state::state(alloc_func func, void *data) {
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command *p;
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if (!func) {
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func = default_alloc;
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}
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/* allocator is not set up yet, use func directly */
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auto *statep = static_cast<internal_state *>(
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func(data, nullptr, 0, sizeof(internal_state))
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);
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/* allocator will be set up in the constructor */
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new (statep) internal_state{func, data};
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try {
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p_tstate = statep->create<thread_state>(statep);
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} catch (...) {
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statep->destroy(statep);
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throw;
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}
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p_tstate->pstate = this;
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p_tstate->istate = statep;
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p_tstate->owner = true;
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for (std::size_t i = 0; i < MAX_ARGUMENTS; ++i) {
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char buf[16];
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snprintf(buf, sizeof(buf), "arg%zu", i + 1);
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statep->new_ident(
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*this, static_cast<char const *>(buf), IDENT_FLAG_ARG
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);
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}
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statep->id_dummy = &statep->new_ident(*this, "//dummy", IDENT_FLAG_UNKNOWN);
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statep->ivar_numargs = &new_var("numargs", 0, true);
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statep->ivar_dbgalias = &new_var("dbgalias", 4);
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/* default handlers for variables */
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statep->cmd_ivar = &new_command("//ivar_builtin", "$i#", [](
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auto &cs, auto args, auto &
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) {
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auto &iv = static_cast<builtin_var &>(args[0].get_ident(cs));
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if (args[2].get_integer() <= 1) {
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std::printf("%s = ", iv.name().data());
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std::printf(INTEGER_FORMAT, iv.value().get_integer());
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std::printf("\n");
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} else {
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iv.set_value(cs, args[1]);
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}
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});
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statep->cmd_fvar = &new_command("//fvar_builtin", "$f#", [](
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auto &cs, auto args, auto &
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) {
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auto &fv = static_cast<builtin_var &>(args[0].get_ident(cs));
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if (args[2].get_integer() <= 1) {
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auto val = fv.value().get_float();
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std::printf("%s = ", fv.name().data());
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if (std::floor(val) == val) {
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std::printf(ROUND_FLOAT_FORMAT, val);
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} else {
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std::printf(FLOAT_FORMAT, val);
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}
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std::printf("\n");
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} else {
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fv.set_value(cs, args[1]);
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}
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});
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statep->cmd_svar = &new_command("//svar_builtin", "$s#", [](
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auto &cs, auto args, auto &
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) {
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auto &sv = static_cast<builtin_var &>(args[0].get_ident(cs));
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if (args[2].get_integer() <= 1) {
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auto val = sv.value().get_string(cs);
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if (val.view().find('"') == std::string_view::npos) {
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std::printf("%s = \"%s\"\n", sv.name().data(), val.data());
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} else {
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std::printf("%s = [%s]\n", sv.name().data(), val.data());
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}
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} else {
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sv.set_value(cs, args[1]);
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}
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});
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statep->cmd_var_changed = nullptr;
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/* builtins */
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p = &new_command("do", "b", [](auto &cs, auto args, auto &res) {
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res = args[0].get_code().call(cs);
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});
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static_cast<command_impl *>(p)->p_type = ID_DO;
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p = &new_command("doargs", "b", [](auto &cs, auto args, auto &res) {
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res = exec_code_with_args(*cs.p_tstate, args[0].get_code());
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});
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static_cast<command_impl *>(p)->p_type = ID_DOARGS;
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p = &new_command("if", "abb", [](auto &cs, auto args, auto &res) {
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res = (args[0].get_bool() ? args[1] : args[2]).get_code().call(cs);
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});
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static_cast<command_impl *>(p)->p_type = ID_IF;
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p = &new_command("result", "a", [](auto &, auto args, auto &res) {
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res = std::move(args[0]);
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});
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static_cast<command_impl *>(p)->p_type = ID_RESULT;
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p = &new_command("!", "a", [](auto &, auto args, auto &res) {
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res.set_integer(!args[0].get_bool());
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});
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static_cast<command_impl *>(p)->p_type = ID_NOT;
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p = &new_command("&&", "c1...", [](auto &cs, auto args, auto &res) {
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if (args.empty()) {
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res.set_integer(1);
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} else {
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for (size_t i = 0; i < args.size(); ++i) {
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auto code = args[i].get_code();
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if (code) {
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res = code.call(cs);
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} else {
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res = std::move(args[i]);
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}
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if (!res.get_bool()) {
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break;
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}
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}
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}
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});
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static_cast<command_impl *>(p)->p_type = ID_AND;
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p = &new_command("||", "c1...", [](auto &cs, auto args, auto &res) {
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if (args.empty()) {
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res.set_integer(0);
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} else {
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for (size_t i = 0; i < args.size(); ++i) {
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auto code = args[i].get_code();
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if (code) {
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res = code.call(cs);
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} else {
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res = std::move(args[i]);
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}
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if (res.get_bool()) {
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break;
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}
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}
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}
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});
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static_cast<command_impl *>(p)->p_type = ID_OR;
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p = &new_command("local", "", nullptr);
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static_cast<command_impl *>(p)->p_type = ID_LOCAL;
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p = &new_command("break", "", [](auto &cs, auto, auto &) {
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if (cs.p_tstate->loop_level) {
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throw break_exception{};
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} else {
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throw error{cs, "no loop to break"};
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}
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});
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static_cast<command_impl *>(p)->p_type = ID_BREAK;
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p = &new_command("continue", "", [](auto &cs, auto, auto &) {
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if (cs.p_tstate->loop_level) {
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throw continue_exception{};
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} else {
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throw error{cs, "no loop to continue"};
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}
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});
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static_cast<command_impl *>(p)->p_type = ID_CONTINUE;
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}
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LIBCUBESCRIPT_EXPORT state::~state() {
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if (!p_tstate || !p_tstate->owner) {
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return;
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}
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auto *sp = p_tstate->istate;
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sp->destroy(p_tstate);
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sp->destroy(sp);
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}
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LIBCUBESCRIPT_EXPORT state::state(state &&s) {
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swap(s);
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}
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LIBCUBESCRIPT_EXPORT state &state::operator=(state &&s) {
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if (p_tstate && p_tstate->owner) {
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auto *sp = p_tstate->istate;
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sp->destroy(p_tstate);
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sp->destroy(sp);
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}
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p_tstate = s.p_tstate;
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s.p_tstate = nullptr;
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return *this;
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}
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LIBCUBESCRIPT_EXPORT void state::swap(state &s) {
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std::swap(p_tstate, s.p_tstate);
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}
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state::state(void *is) {
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auto *s = static_cast<internal_state *>(is);
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p_tstate = s->create<thread_state>(s);
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p_tstate->pstate = this;
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p_tstate->istate = s;
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p_tstate->owner = false;
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}
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LIBCUBESCRIPT_EXPORT state state::new_thread() {
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return state{p_tstate->istate};
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}
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LIBCUBESCRIPT_EXPORT hook_func state::call_hook(hook_func func) {
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return p_tstate->set_hook(std::move(func));
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}
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LIBCUBESCRIPT_EXPORT hook_func const &state::call_hook() const {
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return p_tstate->get_hook();
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}
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LIBCUBESCRIPT_EXPORT hook_func &state::call_hook() {
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return p_tstate->get_hook();
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}
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LIBCUBESCRIPT_EXPORT void *state::alloc(void *ptr, size_t os, size_t ns) {
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return p_tstate->istate->alloc(ptr, os, ns);
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}
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LIBCUBESCRIPT_EXPORT std::size_t state::ident_count() const {
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return p_tstate->istate->identmap.size();
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}
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LIBCUBESCRIPT_EXPORT std::optional<
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std::reference_wrapper<ident>
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> state::get_ident(std::string_view name) {
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auto *id = p_tstate->istate->get_ident(name);
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if (!id) {
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return std::nullopt;
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}
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return *id;
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}
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LIBCUBESCRIPT_EXPORT std::optional<
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std::reference_wrapper<ident const>
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> state::get_ident(std::string_view name) const {
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auto *id = p_tstate->istate->get_ident(name);
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if (!id) {
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return std::nullopt;
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}
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return *id;
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}
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LIBCUBESCRIPT_EXPORT ident &state::get_ident(std::size_t index) {
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return *p_tstate->istate->identmap[index];
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}
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LIBCUBESCRIPT_EXPORT ident const &state::get_ident(std::size_t index) const {
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return *p_tstate->istate->identmap[index];
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}
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LIBCUBESCRIPT_EXPORT void state::clear_override(ident &id) {
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if (!id.is_overridden(*this)) {
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return;
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}
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switch (id.type()) {
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case ident_type::ALIAS: {
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auto &ast = p_tstate->get_astack(static_cast<alias *>(&id));
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ast.node->val_s.set_string("", *this);
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ast.node->code = bcode_ref{};
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ast.flags &= ~IDENT_FLAG_OVERRIDDEN;
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return;
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}
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case ident_type::VAR: {
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auto &v = static_cast<var_impl &>(id);
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any_value oldv = v.value();
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v.p_storage = std::move(v.p_override);
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var_changed(*p_tstate, v, oldv);
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static_cast<var_impl *>(
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static_cast<builtin_var *>(&v)
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)->p_flags &= ~IDENT_FLAG_OVERRIDDEN;
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return;
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}
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default:
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break;
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}
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}
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LIBCUBESCRIPT_EXPORT void state::clear_overrides() {
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for (auto &p: p_tstate->istate->idents) {
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clear_override(*(p.second));
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}
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}
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inline int var_flags(bool read_only, var_type vtp) {
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int ret = 0;
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if (read_only) {
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ret |= IDENT_FLAG_READONLY;
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}
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switch (vtp) {
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case var_type::PERSISTENT:
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ret |= IDENT_FLAG_PERSIST;
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break;
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case var_type::OVERRIDABLE:
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ret |= IDENT_FLAG_OVERRIDE;
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break;
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default:
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break;
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}
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return ret;
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}
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static void var_name_check(
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state &cs, ident *id, std::string_view n
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) {
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if (id) {
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throw error_p::make(
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cs, "redefinition of ident '%.*s'", int(n.size()), n.data()
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);
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} else if (!is_valid_name(n)) {
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throw error_p::make(
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cs, "'%.*s' is not a valid variable name",
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int(n.size()), n.data()
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);
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}
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}
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LIBCUBESCRIPT_EXPORT builtin_var &state::new_var(
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std::string_view n, integer_type v, bool read_only, var_type vtp
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) {
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auto *iv = p_tstate->istate->create<var_impl>(
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string_ref{*this, n},var_flags(read_only, vtp)
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);
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iv->p_storage.set_integer(v);
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try {
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var_name_check(*this, p_tstate->istate->get_ident(n), n);
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} catch (...) {
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p_tstate->istate->destroy(iv);
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throw;
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}
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p_tstate->istate->add_ident(iv, iv);
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return *iv;
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}
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LIBCUBESCRIPT_EXPORT builtin_var &state::new_var(
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std::string_view n, float_type v, bool read_only, var_type vtp
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) {
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auto *fv = p_tstate->istate->create<var_impl>(
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string_ref{*this, n}, var_flags(read_only, vtp)
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);
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fv->p_storage.set_float(v);
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try {
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var_name_check(*this, p_tstate->istate->get_ident(n), n);
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} catch (...) {
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p_tstate->istate->destroy(fv);
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throw;
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}
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p_tstate->istate->add_ident(fv, fv);
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return *fv;
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}
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LIBCUBESCRIPT_EXPORT builtin_var &state::new_var(
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std::string_view n, std::string_view v, bool read_only, var_type vtp
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) {
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auto *sv = p_tstate->istate->create<var_impl>(
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string_ref{*this, n}, var_flags(read_only, vtp)
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);
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sv->p_storage.set_string(v, *this);
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try {
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var_name_check(*this, p_tstate->istate->get_ident(n), n);
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} catch (...) {
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p_tstate->istate->destroy(sv);
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throw;
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}
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p_tstate->istate->add_ident(sv, sv);
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return *sv;
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}
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LIBCUBESCRIPT_EXPORT ident &state::new_ident(std::string_view n) {
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return p_tstate->istate->new_ident(*this, n, IDENT_FLAG_UNKNOWN);
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}
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LIBCUBESCRIPT_EXPORT void state::assign_value(
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std::string_view name, any_value v
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) {
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auto id = get_ident(name);
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if (id) {
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switch (id->get().type()) {
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case ident_type::ALIAS: {
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static_cast<alias &>(id->get()).set_value(*this, std::move(v));
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return;
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}
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case ident_type::VAR:
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id->get().call(span_type<any_value>{&v, 1}, *this);
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break;
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default:
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throw error_p::make(
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*this, "cannot redefine builtin %s with an alias",
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id->get().name().data()
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);
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}
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} else if (!is_valid_name(name)) {
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throw error_p::make(
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*this, "cannot alias invalid name '%s'", name.data()
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);
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} else {
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auto *a = p_tstate->istate->create<alias_impl>(
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*this, string_ref{*this, name}, std::move(v),
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p_tstate->ident_flags
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);
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p_tstate->istate->add_ident(a, a);
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}
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}
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|
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LIBCUBESCRIPT_EXPORT any_value state::lookup_value(std::string_view name) {
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ident *id = nullptr;
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auto idopt = get_ident(name);
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if (!idopt) {
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id = nullptr;
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} else {
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id = &idopt->get();
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}
|
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alias_stack *ast;
|
|
if (id) {
|
|
switch(id->type()) {
|
|
case ident_type::ALIAS: {
|
|
auto *a = static_cast<alias_impl *>(id);
|
|
ast = &p_tstate->get_astack(static_cast<alias *>(id));
|
|
if (ast->flags & IDENT_FLAG_UNKNOWN) {
|
|
break;
|
|
}
|
|
if (a->is_arg() && !ident_is_used_arg(id, *p_tstate)) {
|
|
return any_value{};
|
|
}
|
|
return ast->node->val_s.get_plain();
|
|
}
|
|
case ident_type::VAR:
|
|
return static_cast<builtin_var *>(id)->value();
|
|
case ident_type::COMMAND: {
|
|
any_value val{};
|
|
auto *cimpl = static_cast<command_impl *>(id);
|
|
auto &args = p_tstate->vmstack;
|
|
auto osz = args.size();
|
|
/* pad with as many empty values as we need */
|
|
args.resize(osz + cimpl->arg_count());
|
|
try {
|
|
exec_command(
|
|
*p_tstate, cimpl, cimpl, &args[osz], val, 0, true
|
|
);
|
|
} catch (...) {
|
|
args.resize(osz);
|
|
throw;
|
|
}
|
|
args.resize(osz);
|
|
return val;
|
|
}
|
|
default:
|
|
return any_value{};
|
|
}
|
|
}
|
|
throw error_p::make(*this, "unknown alias lookup: %s", name.data());
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT void state::reset_value(std::string_view name) {
|
|
auto id = get_ident(name);
|
|
if (!id) {
|
|
throw error_p::make(
|
|
*this, "variable '%s' does not exist", name.data()
|
|
);
|
|
}
|
|
if (id->get().type() == ident_type::VAR) {
|
|
if (static_cast<builtin_var &>(id->get()).is_read_only()) {
|
|
throw error_p::make(
|
|
*this, "variable '%s' is read only", name.data()
|
|
);
|
|
}
|
|
}
|
|
clear_override(id->get());
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT void state::touch_value(std::string_view name) {
|
|
auto id = get_ident(name);
|
|
if (!id) {
|
|
return;
|
|
}
|
|
auto &idr = id->get();
|
|
if (idr.type() != ident_type::VAR) {
|
|
return;
|
|
}
|
|
auto &v = static_cast<builtin_var &>(idr);
|
|
auto vv = v.value();
|
|
var_changed(*p_tstate, v, vv);
|
|
}
|
|
|
|
static char const *allowed_builtins[] = {
|
|
"//ivar", "//fvar", "//svar", "//var_changed",
|
|
"//ivar_builtin", "//fvar_builtin", "//svar_builtin",
|
|
nullptr
|
|
};
|
|
|
|
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 'f':
|
|
case 'a':
|
|
case 'c':
|
|
case '#':
|
|
case 's':
|
|
case 'b':
|
|
case 'v':
|
|
case '$':
|
|
++nargs;
|
|
break;
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4': {
|
|
int nrep = (*fmt - '0');
|
|
if (nargs < nrep) {
|
|
throw error{
|
|
*this, "not enough arguments to repeat"
|
|
};
|
|
}
|
|
if ((args.end() - fmt) != 4) {
|
|
throw error{
|
|
*this, "malformed argument list"
|
|
};
|
|
}
|
|
if (fmt[1] != '.') {
|
|
throw error{
|
|
*this, "repetition without variadic arguments"
|
|
};
|
|
}
|
|
nargs -= nrep;
|
|
break;
|
|
}
|
|
case '.':
|
|
if (
|
|
((fmt + 3) != args.end()) ||
|
|
std::memcmp(&fmt[0], "...", 3)
|
|
) {
|
|
throw error{
|
|
*this, "unterminated variadic argument list"
|
|
};
|
|
}
|
|
fmt += 2;
|
|
break;
|
|
default:
|
|
throw error_p::make(
|
|
*this, "invalid argument type: %c", *fmt
|
|
);
|
|
}
|
|
}
|
|
auto &is = *p_tstate->istate;
|
|
auto *cmd = is.create<command_impl>(
|
|
string_ref{*this, name}, string_ref{*this, args},
|
|
nargs, std::move(func)
|
|
);
|
|
/* we can set these builtins */
|
|
command **bptrs[] = {
|
|
&is.cmd_ivar, &is.cmd_fvar, &is.cmd_svar, &is.cmd_var_changed
|
|
};
|
|
auto nbptrs = sizeof(bptrs) / sizeof(*bptrs);
|
|
/* provided a builtin */
|
|
if ((name.size() >= 2) && (name[0] == '/') && (name[1] == '/')) {
|
|
/* sanitize */
|
|
for (auto **p = allowed_builtins; *p; ++p) {
|
|
if (!name.compare(*p)) {
|
|
/* if it's one of the settable ones, maybe set it */
|
|
if (std::size_t(p - allowed_builtins) < nbptrs) {
|
|
if (!is.get_ident(name)) {
|
|
/* only set if it does not exist already */
|
|
*bptrs[p - allowed_builtins] = cmd;
|
|
goto do_add;
|
|
}
|
|
}
|
|
/* this will ensure we're not redefining them */
|
|
goto valid;
|
|
}
|
|
}
|
|
/* we haven't found one matching the list, so error */
|
|
is.destroy(cmd);
|
|
throw error_p::make(
|
|
*this, "forbidden builtin command: %.*s",
|
|
int(name.size()), name.data()
|
|
);
|
|
}
|
|
valid:
|
|
if (is.get_ident(name)) {
|
|
is.destroy(cmd);
|
|
throw error_p::make(
|
|
*this, "redefinition of ident '%.*s'",
|
|
int(name.size()), name.data()
|
|
);
|
|
}
|
|
do_add:
|
|
is.add_ident(cmd, cmd);
|
|
return *cmd;
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT bcode_ref state::compile(
|
|
std::string_view v, std::string_view source
|
|
) {
|
|
gen_state gs{*p_tstate};
|
|
gs.gen_main(v, source);
|
|
return gs.steal_ref();
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT bool state::override_mode() const {
|
|
return (p_tstate->ident_flags & IDENT_FLAG_OVERRIDDEN);
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT bool state::override_mode(bool v) {
|
|
bool was = override_mode();
|
|
if (v) {
|
|
p_tstate->ident_flags |= IDENT_FLAG_OVERRIDDEN;
|
|
} else {
|
|
p_tstate->ident_flags &= ~IDENT_FLAG_OVERRIDDEN;
|
|
}
|
|
return was;
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT bool state::persist_mode() const {
|
|
return (p_tstate->ident_flags & IDENT_FLAG_PERSIST);
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT bool state::persist_mode(bool v) {
|
|
bool was = persist_mode();
|
|
if (v) {
|
|
p_tstate->ident_flags |= IDENT_FLAG_PERSIST;
|
|
} else {
|
|
p_tstate->ident_flags &= ~IDENT_FLAG_PERSIST;
|
|
}
|
|
return was;
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT std::size_t state::max_call_depth() const {
|
|
return p_tstate->max_call_depth;
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT std::size_t state::max_call_depth(std::size_t v) {
|
|
auto old = p_tstate->max_call_depth;
|
|
p_tstate->max_call_depth = v;
|
|
return old;
|
|
}
|
|
|
|
LIBCUBESCRIPT_EXPORT void std_init_all(state &cs) {
|
|
std_init_base(cs);
|
|
std_init_math(cs);
|
|
std_init_string(cs);
|
|
std_init_list(cs);
|
|
}
|
|
|
|
} /* namespace cubescript */
|