diff options
Diffstat (limited to 'stand/liblua/lutils.c')
| -rw-r--r-- | stand/liblua/lutils.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/stand/liblua/lutils.c b/stand/liblua/lutils.c index 1792d0c8c620..274d9a39da21 100644 --- a/stand/liblua/lutils.c +++ b/stand/liblua/lutils.c @@ -76,6 +76,25 @@ lua_has_command(lua_State *L) } static int +lua_has_feature(lua_State *L) +{ + const char *feature; + char *msg; + + feature = luaL_checkstring(L, 1); + + if (feature_name_is_enabled(feature)) { + lua_pushboolean(L, 1); + return 1; + } + + lua_pushnil(L); + lua_pushstring(L, "Feature not enabled"); + return 2; +} + + +static int lua_perform(lua_State *L) { int argc; @@ -552,6 +571,7 @@ static const struct luaL_Reg loaderlib[] = { REG_SIMPLE(parse), REG_SIMPLE(getenv), REG_SIMPLE(has_command), + REG_SIMPLE(has_feature), REG_SIMPLE(perform), REG_SIMPLE(printc), /* Also registered as the global 'printc' */ REG_SIMPLE(setenv), @@ -579,6 +599,33 @@ static const struct luaL_Reg iolib[] = { }; #undef REG_SIMPLE +static void +lua_add_feature(void *cookie, const char *name, const char *desc, bool enabled) +{ + lua_State *L = cookie; + + /* + * The feature table consists solely of features that are enabled, and + * their associated descriptions for debugging purposes. + */ + lua_pushstring(L, desc); + lua_setfield(L, -2, name); +} + +static void +lua_add_features(lua_State *L) +{ + + lua_newtable(L); + feature_iter(&lua_add_feature, L); + + /* + * We should still have just the table on the stack after we're done + * iterating. + */ + lua_setfield(L, -2, "features"); +} + int luaopen_loader(lua_State *L) { @@ -592,6 +639,7 @@ luaopen_loader(lua_State *L) lua_setfield(L, -2, "lua_path"); lua_pushinteger(L, bootprog_rev); lua_setfield(L, -2, "version"); + lua_add_features(L); /* Set global printc to loader.printc */ lua_register(L, "printc", lua_printc); return 1; |