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libubox: add support for newer Lua versions #14

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libubox: add support for newer Lua versions #14

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26 changes: 23 additions & 3 deletions lua/uloop.c
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@
#include <stdlib.h>
#include <unistd.h>

#define LUA_COMPAT_5_3 // for lua_strlen

#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
Expand Down Expand Up @@ -53,6 +55,24 @@ struct lua_uloop_signal {

static lua_State *state;

#if !defined LUA_VERSION_NUM || LUA_VERSION_NUM==501
/*
** Adapted from Lua 5.2.0
*/
static void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
luaL_checkstack(L, nup+1, "too many upvalues");
for (; l->name != NULL; l++) { /* fill the table with given functions */
int i;
lua_pushstring(L, l->name);
for (i = 0; i < nup; i++) /* copy upvalues to the top */
lua_pushvalue(L, -(nup+1));
lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */
lua_settable(L, -(nup + 3));
}
lua_pop(L, nup); /* remove upvalues */
}
#endif

static void *
ul_create_userdata(lua_State *L, size_t size, const luaL_Reg *reg, lua_CFunction gc)
{
Expand All @@ -67,7 +87,7 @@ ul_create_userdata(lua_State *L, size_t size, const luaL_Reg *reg, lua_CFunction
lua_pushvalue(L, -1);
lua_setmetatable(L, -3);
lua_pushvalue(L, -2);
luaI_openlib(L, NULL, reg, 1);
luaL_setfuncs(L, reg, 1);
lua_pushvalue(L, -2);

return ret;
Expand Down Expand Up @@ -597,7 +617,7 @@ static int ul_end(lua_State *L)
return 1;
}

static luaL_reg uloop_func[] = {
static luaL_Reg uloop_func[] = {
{"init", ul_init},
{"run", ul_run},
{"timer", ul_timer},
Expand All @@ -623,7 +643,7 @@ int luaopen_uloop(lua_State *L)
lua_createtable(L, 1, 0);
lua_setglobal(L, "__uloop_fds");

luaL_openlib(L, "uloop", uloop_func, 0);
luaL_setfuncs(L, uloop_func, 0);
lua_pushstring(L, "_VERSION");
lua_pushstring(L, "1.0");
lua_rawset(L, -3);
Expand Down