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-rw-r--r--src/liolib.js13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/liolib.js b/src/liolib.js
index 1557adf..575b3ec 100644
--- a/src/liolib.js
+++ b/src/liolib.js
@@ -19,6 +19,18 @@ const isclosed = function(p) {
return p.closef === null;
};
+const io_type = function(L) {
+ lauxlib.luaL_checkany(L, 1);
+ let p = lauxlib.luaL_testudata(L, 1, lauxlib.LUA_FILEHANDLE);
+ if (p === null)
+ lua.lua_pushnil(L); /* not a file */
+ else if (isclosed(p))
+ lua.lua_pushliteral(L, "closed file");
+ else
+ lua.lua_pushliteral(L, "file");
+ return 1;
+};
+
const f_tostring = function(L) {
let p = tolstream(L);
if (isclosed(p))
@@ -95,6 +107,7 @@ const f_write = function(L) {
const iolib = {
"close": io_close,
+ "type": io_type,
"write": io_write
};