mirror of https://github.com/odrling/Aegisub
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/// @file auto4_lua_scriptreader.cpp
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/// @brief Script-file reader for Lua 5.1-based scripting engine
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/// @ingroup scripting
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///
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#include "config.h"
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#include "auto4_lua_scriptreader.h"
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#include "auto4_lua_utils.h"
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#include <libaegisub/io.h>
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#include <fstream>
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#include <lua.h>
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#include <memory>
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namespace Automation4 {
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bool LoadFile(lua_State *L, agi::fs::path const& raw_filename) {
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auto filename = raw_filename;
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try {
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filename = agi::fs::Canonicalize(raw_filename);
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}
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catch (agi::fs::FileSystemUnknownError const& e) {
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LOG_E("auto4/lua") << "Error canonicalizing path: " << e.GetChainedMessage();
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}
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std::unique_ptr<std::istream> file(agi::io::Open(filename, true));
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file->seekg(0, std::ios::end);
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size_t size = file->tellg();
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file->seekg(0, std::ios::beg);
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std::string buff;
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buff.resize(size);
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// Discard the BOM if present
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file->read(&buff[0], 3);
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size_t start = file->gcount();
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if (start == 3 && buff[0] == -17 && buff[1] == -69 && buff[2] == -65) {
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buff.resize(size - 3);
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start = 0;
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}
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file->read(&buff[start], size - start);
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if (!agi::fs::HasExtension(filename, "moon"))
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return luaL_loadbuffer(L, &buff[0], buff.size(), filename.string().c_str()) == 0;
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// Save the text we'll be loading for the line number rewriting in the
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// error handling
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push_value(L, buff);
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lua_setfield(L, LUA_REGISTRYINDEX, ("raw moonscript: " + filename.string()).c_str());
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// We have a MoonScript file, so we need to load it with that
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// It might be nice to have a dedicated lua state for compiling
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// MoonScript to Lua
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if (luaL_dostring(L, "return require('moonscript').loadstring"))
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return false; // Leaves error message on stack
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lua_pushlstring(L, &buff[0], buff.size());
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lua_pushstring(L, filename.string().c_str());
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if (lua_pcall(L, 2, 2, 0))
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return false; // Leaves error message on stack
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// loadstring returns nil, error on error or a function on success
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if (lua_isnil(L, 1)) {
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lua_remove(L, 1);
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return false;
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}
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lua_pop(L, 1); // Remove the extra nil for the stackchecker
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return true;
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}
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}
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