static int Get(lua_State *L) {
luacl_buffer_object *buffer = traits::CheckObject(L, 1);
lua_Integer index = luaL_checkinteger(L, 2);
luaL_argcheck(L, index >= 0, 2, "Invalid index");
luaL_argcheck(L, (index + 1) * sizeof(T) <= buffer->size, 2, "Index out of bound");
T * data = reinterpret_cast<T *>(&buffer->data);
lua_pushnumber(L, lua_Number(data[index]));
return 1;
}
static int math_random (lua_State *L) {
/* the `%' avoids the (rare) case of r==1, and is needed also because on
some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */
// SPRING
// respect the original lua code that uses rand,
// and rand is auto-seeded always with the same value
#ifdef STREFLOP_H // unitsync is compiled without streflop
if (lua_streflop_random_seed == 0) {
lua_streflop_random_seed = 1;
streflop::RandomInit(1);
}
lua_Number r =
streflop::Random<true, false, lua_Number>(lua_Number(0.0), lua_Number(1.0));
#else
lua_Number r = 0.0f;
#endif
switch (lua_gettop(L)) { /* check number of arguments */
case 0: { /* no arguments */
lua_pushnumber(L, r); /* Number between 0 and 1 */
break;
}
case 1: { /* only upper limit */
int u = luaL_checkint(L, 1);
luaL_argcheck(L, 1<=u, 1, "interval is empty");
lua_pushnumber(L, floor(r*u)+1); /* int between 1 and `u' */
break;
}
case 2: { /* lower and upper limits */
int l = luaL_checkint(L, 1);
int u = luaL_checkint(L, 2);
luaL_argcheck(L, l<=u, 2, "interval is empty");
lua_pushnumber(L, floor(r*(u-l+1))+l); /* int between `l' and `u' */
break;
}
default: return luaL_error(L, "wrong number of arguments");
}
return 1;
}
static int GetSize(lua_State *L) {
lua_pushnumber(L, lua_Number(sizeof(T)));
return 1;
}
static int l_fixed_tostring(lua_State *L)
{
const fixed *v = LuaFixed::CheckFromLua(L, 1);
lua_pushfstring(L, "fixed(%f)", lua_Number(v->ToDouble()));
return 1;
}
