diff options
| -rw-r--r-- | README.md | 5 | ||||
| -rw-r--r-- | src/lauxlib.js | 49 |
2 files changed, 49 insertions, 5 deletions
@@ -41,22 +41,17 @@ - [x] ... - [ ] luaL_addsize - [ ] luaL_checkoption - - [ ] luaL_checkudata - [ ] luaL_checkversion - [ ] luaL_dofile - [ ] luaL_dostring - [ ] luaL_execresult - [ ] luaL_fileresult - - [ ] luaL_getmetatable - [ ] luaL_gsub - [ ] luaL_newlibtable - - [ ] luaL_newmetatable - [ ] luaL_optnumber - [ ] luaL_prepbuffer - [ ] luaL_pushresultsize - [ ] luaL_ref - - [ ] luaL_setmetatable - - [ ] luaL_testudata - [ ] luaL_unref - [ ] Run [Lua test suite](https://github.com/lua/tests) - [x] constructs.lua (`_soft`) diff --git a/src/lauxlib.js b/src/lauxlib.js index d84f174..7407479 100644 --- a/src/lauxlib.js +++ b/src/lauxlib.js @@ -193,6 +193,50 @@ const luaL_error = function(L, fmt, ...args) { return lua.lua_error(L); }; + +const luaL_getmetatable = function(L, n) { + return lua.lua_getfield(L, lua.LUA_REGISTRYINDEX, n); +}; + +const luaL_newmetatable = function(L, tname) { + if (luaL_getmetatable(L, tname) !== lua.LUA_TNIL) /* name already in use? */ + return 0; /* leave previous value on top, but return 0 */ + lua.lua_pop(L, 1); + lua.lua_createtable(L, 0, 2); /* create metatable */ + lua.lua_pushstring(L, tname); + lua.lua_setfield(L, -2, lua.to_luastring("__name")); /* metatable.__name = tname */ + lua.lua_pushvalue(L, -1); + lua.lua_setfield(L, lua.LUA_REGISTRYINDEX, tname); /* registry.name = metatable */ + return 1; + +}; + +const luaL_setmetatable = function(L, tname) { + luaL_getmetatable(L, tname); + lua.lua_setmetatable(L, -2); +}; + +const luaL_testudata = function(L, ud, tname) { + let p = lua.lua_touserdata(L, ud); + if (p !== null) { /* value is a userdata? */ + if (lua.lua_getmetatable(L, ud)) { /* does it have a metatable? */ + luaL_getmetatable(L, tname); /* get correct metatable */ + if (!lua.lua_rawequal(L, -1, -2)) /* not the same? */ + p = null; /* value is a userdata with wrong metatable */ + lua.lua_pop(L, 2); /* remove both metatables */ + return p; + } + } + return null; /* value is not a userdata with a metatable */ +}; + +const luaL_checkudata = function(L, ud, tname) { + let p = luaL_testudata(L, ud, tname); + if (p === null) typeerror(L, ud, tname); + return p; +}; + + const tag_error = function(L, arg, tag) { typeerror(L, arg, lua.lua_typename(L, tag)); }; @@ -648,14 +692,17 @@ module.exports.luaL_checknumber = luaL_checknumber; module.exports.luaL_checkstack = luaL_checkstack; module.exports.luaL_checkstring = luaL_checkstring; module.exports.luaL_checktype = luaL_checktype; +module.exports.luaL_checkudata = luaL_checkudata; module.exports.luaL_error = luaL_error; module.exports.luaL_getmetafield = luaL_getmetafield; +module.exports.luaL_getmetatable = luaL_getmetatable; module.exports.luaL_getsubtable = luaL_getsubtable; module.exports.luaL_len = luaL_len; module.exports.luaL_loadbuffer = luaL_loadbuffer; module.exports.luaL_loadbufferx = luaL_loadbufferx; module.exports.luaL_loadstring = luaL_loadstring; module.exports.luaL_newlib = luaL_newlib; +module.exports.luaL_newmetatable = luaL_newmetatable; module.exports.luaL_newstate = luaL_newstate; module.exports.luaL_opt = luaL_opt; module.exports.luaL_optinteger = luaL_optinteger; @@ -665,6 +712,8 @@ module.exports.luaL_prepbuffsize = luaL_prepbuffsize; module.exports.luaL_pushresult = luaL_pushresult; module.exports.luaL_requiref = luaL_requiref; module.exports.luaL_setfuncs = luaL_setfuncs; +module.exports.luaL_setmetatable = luaL_setmetatable; +module.exports.luaL_testudata = luaL_testudata; module.exports.luaL_tolstring = luaL_tolstring; module.exports.luaL_traceback = luaL_traceback; module.exports.luaL_typename = luaL_typename; |