288 lines
9.1 KiB
C++
288 lines
9.1 KiB
C++
#include <filesystem>
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#include <string>
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#include <set>
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#include "coders/gzip.hpp"
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#include "engine.hpp"
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#include "files/engine_paths.hpp"
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#include "files/files.hpp"
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#include "util/stringutil.hpp"
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#include "api_lua.hpp"
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#include "../lua_engine.hpp"
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namespace fs = std::filesystem;
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using namespace scripting;
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static fs::path resolve_path(const std::string& path) {
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return engine->getPaths()->resolve(path);
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}
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static fs::path resolve_path_soft(const std::string& path) {
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if (path.find(':') == std::string::npos) {
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return fs::u8path("");
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}
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return engine->getPaths()->resolve(path, false);
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}
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static int l_find(lua::State* L) {
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auto path = lua::require_string(L, 1);
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try {
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return lua::pushstring(L, engine->getResPaths()->findRaw(path));
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} catch (const std::runtime_error& err) {
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return 0;
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}
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}
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static int l_resolve(lua::State* L) {
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fs::path path = resolve_path(lua::require_string(L, 1));
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return lua::pushstring(L, path.u8string());
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}
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static int l_read(lua::State* L) {
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fs::path path = resolve_path(lua::require_string(L, 1));
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if (fs::is_regular_file(path)) {
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return lua::pushstring(L, files::read_string(path));
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}
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throw std::runtime_error(
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"file does not exists " + util::quote(path.u8string())
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);
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}
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static std::set<std::string> writeable_entry_points {
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"world", "export", "config"
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};
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static fs::path get_writeable_path(lua::State* L) {
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std::string rawpath = lua::require_string(L, 1);
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fs::path path = resolve_path(rawpath);
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auto entryPoint = rawpath.substr(0, rawpath.find(':'));
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if (writeable_entry_points.find(entryPoint) == writeable_entry_points.end()) {
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if (lua::getglobal(L, "__vc_warning")) {
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lua::pushstring(L, "writing to read-only entry point");
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lua::pushstring(L, entryPoint);
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lua::pushinteger(L, 1);
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lua::call_nothrow(L, 3);
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}
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}
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return path;
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}
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static int l_write(lua::State* L) {
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fs::path path = get_writeable_path(L);
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std::string text = lua::require_string(L, 2);
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files::write_string(path, text);
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return 1;
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}
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static int l_remove(lua::State* L) {
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std::string rawpath = lua::require_string(L, 1);
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fs::path path = resolve_path(rawpath);
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auto entryPoint = rawpath.substr(0, rawpath.find(':'));
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if (writeable_entry_points.find(entryPoint) == writeable_entry_points.end()) {
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throw std::runtime_error("access denied");
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}
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return lua::pushboolean(L, fs::remove(path));
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}
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static int l_remove_tree(lua::State* L) {
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std::string rawpath = lua::require_string(L, 1);
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fs::path path = resolve_path(rawpath);
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auto entryPoint = rawpath.substr(0, rawpath.find(':'));
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if (writeable_entry_points.find(entryPoint) == writeable_entry_points.end()) {
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throw std::runtime_error("access denied");
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}
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return lua::pushinteger(L, fs::remove_all(path));
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}
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static int l_exists(lua::State* L) {
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fs::path path = resolve_path_soft(lua::require_string(L, 1));
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return lua::pushboolean(L, fs::exists(path));
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}
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static int l_isfile(lua::State* L) {
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fs::path path = resolve_path_soft(lua::require_string(L, 1));
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return lua::pushboolean(L, fs::is_regular_file(path));
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}
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static int l_isdir(lua::State* L) {
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fs::path path = resolve_path_soft(lua::require_string(L, 1));
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return lua::pushboolean(L, fs::is_directory(path));
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}
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static int l_length(lua::State* L) {
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fs::path path = resolve_path(lua::require_string(L, 1));
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if (fs::exists(path)) {
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return lua::pushinteger(L, fs::file_size(path));
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} else {
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return lua::pushinteger(L, -1);
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}
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}
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static int l_mkdir(lua::State* L) {
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fs::path path = resolve_path(lua::require_string(L, 1));
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return lua::pushboolean(L, fs::create_directory(path));
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}
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static int l_mkdirs(lua::State* L) {
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fs::path path = resolve_path(lua::require_string(L, 1));
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return lua::pushboolean(L, fs::create_directories(path));
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}
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static int l_read_bytes(lua::State* L) {
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fs::path path = resolve_path(lua::require_string(L, 1));
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if (fs::is_regular_file(path)) {
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size_t length = static_cast<size_t>(fs::file_size(path));
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auto bytes = files::read_bytes(path, length);
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lua::createtable(L, length, 0);
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int newTable = lua::gettop(L);
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for (size_t i = 0; i < length; i++) {
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lua::pushinteger(L, bytes[i]);
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lua::rawseti(L, i + 1, newTable);
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}
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return 1;
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}
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throw std::runtime_error(
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"file does not exists " + util::quote(path.u8string())
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);
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}
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static void read_bytes_from_table(
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lua::State* L, int tableIndex, std::vector<ubyte>& bytes
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) {
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if (!lua::istable(L, tableIndex)) {
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throw std::runtime_error("table expected");
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} else {
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size_t size = lua::objlen(L, tableIndex);
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for (size_t i = 0; i < size; i++) {
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lua::rawgeti(L, i + 1, tableIndex);
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const int byte = lua::tointeger(L, -1);
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lua::pop(L);
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if (byte < 0 || byte > 255) {
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throw std::runtime_error(
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"invalid byte '" + std::to_string(byte) + "'"
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);
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}
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bytes.push_back(byte);
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}
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}
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}
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static int l_write_bytes(lua::State* L) {
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fs::path path = get_writeable_path(L);
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if (auto bytearray = lua::touserdata<lua::LuaBytearray>(L, 2)) {
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auto& bytes = bytearray->data();
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return lua::pushboolean(
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L, files::write_bytes(path, bytes.data(), bytes.size())
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);
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}
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std::vector<ubyte> bytes;
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read_bytes_from_table(L, 2, bytes);
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return lua::pushboolean(
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L, files::write_bytes(path, bytes.data(), bytes.size())
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);
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}
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static int l_list_all_res(lua::State* L, const std::string& path) {
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auto files = engine->getResPaths()->listdirRaw(path);
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lua::createtable(L, files.size(), 0);
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for (size_t i = 0; i < files.size(); i++) {
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lua::pushstring(L, files[i]);
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lua::rawseti(L, i + 1);
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}
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return 1;
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}
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static int l_list(lua::State* L) {
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std::string dirname = lua::require_string(L, 1);
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if (dirname.find(':') == std::string::npos) {
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return l_list_all_res(L, dirname);
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}
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fs::path path = resolve_path(dirname);
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if (!fs::is_directory(path)) {
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throw std::runtime_error(
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util::quote(path.u8string()) + " is not a directory"
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);
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}
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lua::createtable(L, 0, 0);
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size_t index = 1;
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for (auto& entry : fs::directory_iterator(path)) {
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auto name = entry.path().filename().u8string();
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auto file = dirname + "/" + name;
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lua::pushstring(L, file);
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lua::rawseti(L, index);
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index++;
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}
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return 1;
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}
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static int l_gzip_compress(lua::State* L) {
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std::vector<ubyte> bytes;
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read_bytes_from_table(L, 1, bytes);
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auto compressed_bytes = gzip::compress(bytes.data(), bytes.size());
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int newTable = lua::gettop(L);
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for (size_t i = 0; i < compressed_bytes.size(); i++) {
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lua::pushinteger(L, compressed_bytes.data()[i]);
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lua::rawseti(L, i + 1, newTable);
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}
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return 1;
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}
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static int l_gzip_decompress(lua::State* L) {
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std::vector<ubyte> bytes;
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read_bytes_from_table(L, 1, bytes);
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auto decompressed_bytes = gzip::decompress(bytes.data(), bytes.size());
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int newTable = lua::gettop(L);
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for (size_t i = 0; i < decompressed_bytes.size(); i++) {
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lua::pushinteger(L, decompressed_bytes.data()[i]);
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lua::rawseti(L, i + 1, newTable);
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}
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return 1;
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}
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static int l_read_combined_list(lua::State* L) {
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std::string path = lua::require_string(L, 1);
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if (path.find(':') != std::string::npos) {
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throw std::runtime_error("entry point must not be specified");
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}
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return lua::pushvalue(L, engine->getResPaths()->readCombinedList(path));
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}
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static int l_read_combined_object(lua::State* L) {
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std::string path = lua::require_string(L, 1);
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if (path.find(':') != std::string::npos) {
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throw std::runtime_error("entry point must not be specified");
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}
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return lua::pushvalue(L, engine->getResPaths()->readCombinedObject(path));
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}
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const luaL_Reg filelib[] = {
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{"exists", lua::wrap<l_exists>},
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{"find", lua::wrap<l_find>},
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{"isdir", lua::wrap<l_isdir>},
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{"isfile", lua::wrap<l_isfile>},
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{"length", lua::wrap<l_length>},
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{"list", lua::wrap<l_list>},
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{"mkdir", lua::wrap<l_mkdir>},
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{"mkdirs", lua::wrap<l_mkdirs>},
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{"read_bytes", lua::wrap<l_read_bytes>},
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{"read", lua::wrap<l_read>},
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{"remove", lua::wrap<l_remove>},
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{"remove_tree", lua::wrap<l_remove_tree>},
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{"resolve", lua::wrap<l_resolve>},
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{"write_bytes", lua::wrap<l_write_bytes>},
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{"write", lua::wrap<l_write>},
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{"gzip_compress", lua::wrap<l_gzip_compress>},
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{"gzip_decompress", lua::wrap<l_gzip_decompress>},
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{"read_combined_list", lua::wrap<l_read_combined_list>},
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{"read_combined_object", lua::wrap<l_read_combined_object>},
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{NULL, NULL}};
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