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util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1

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This commit is contained in:
Matthew Wild 2018-10-26 19:29:08 +01:00
parent 9fdfa590d2
commit 1454ac8208
3 changed files with 40 additions and 1 deletions
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29
util-src/compat.c Normal file
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@ -0,0 +1,29 @@
#include <lua.h>
#include <lauxlib.h>
static int lc_xpcall (lua_State *L) {
int ret;
int n_arg = lua_gettop(L);
/* f, msgh, p1, p2... */
luaL_argcheck(L, n_arg >= 2, 2, "value expected");
lua_pushvalue(L, 1); /* f to top */
lua_pushvalue(L, 2); /* msgh to top */
lua_replace(L, 1); /* msgh to 1 */
lua_replace(L, 2); /* f to 2 */
/* msgh, f, p1, p2... */
ret = lua_pcall(L, n_arg - 2, LUA_MULTRET, 1);
lua_pushboolean(L, ret == 0);
lua_replace(L, 1);
return lua_gettop(L);
}
int luaopen_util_compat(lua_State *L) {
lua_createtable(L, 0, 2);
{
lua_pushcfunction(L, lc_xpcall);
lua_setfield(L, -2, "xpcall");
}
return 1;
}