mirror of https://github.com/odrling/Aegisub
63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
// Copyright (c) 2014, 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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//
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// Aegisub Project http://www.aegisub.org/
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#include <libaegisub/type_name.h>
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#include <lua.hpp>
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namespace agi { namespace lua {
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static void register_lib_functions(lua_State *) {
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// Base case of recursion; nothing to do
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}
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template<typename Func, typename... Rest>
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void register_lib_functions(lua_State *L, const char *name, Func *func, Rest... rest) {
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lua_pushvalue(L, -2); // push cast function
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lua_pushstring(L, type_name<Func*>::name().c_str());
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// This cast isn't legal, but LuaJIT internally requires that it work, so we can rely on it too
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lua_pushlightuserdata(L, (void *)func);
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lua_call(L, 2, 1);
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lua_setfield(L, -2, name);
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register_lib_functions(L, rest...);
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}
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template<typename... Args>
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void register_lib_table(lua_State *L, std::initializer_list<const char *> types, Args... functions) {
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static_assert((sizeof...(functions) & 1) == 0, "Functions must be alternating names and function pointers");
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lua_getglobal(L, "require");
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lua_pushstring(L, "ffi");
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lua_call(L, 1, 1);
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// Register all passed type with the ffi
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for (auto type : types) {
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lua_getfield(L, -1, "cdef");
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lua_pushfstring(L, "typedef struct %s %s;", type, type);
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lua_call(L, 1, 0);
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}
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lua_getfield(L, -1, "cast");
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lua_remove(L, -2); // ffi table
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lua_createtable(L, 0, sizeof...(functions) / 2);
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register_lib_functions(L, functions...);
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lua_remove(L, -2); // ffi.cast function
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// Leaves lib table on the stack
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}
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} }
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