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#include <math.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
#include "luaT/luaT.h"
#include <stdio.h>
#include <stdlib.h>
typedef struct {
double x, y;
int arr[100];
} Point;
static int point_get_sinx (lua_State *L) {
Point *p = luaT_checkudata(L, 1, "nerv.point");
lua_pushnumber(L, sin(p->x));
return 1;
}
static int point_set_x (lua_State *L) {
Point *p = luaT_checkudata(L, 1, "nerv.point");
p->x = luaL_checknumber(L, 2);
return 0;
}
static int point_get_y(lua_State *L) {
Point *p = luaT_checkudata(L, 1, "nerv.point");
lua_pushnumber(L, sin(p->x));
return 1;
}
static int point_newindex(lua_State *L) {
Point *p = luaT_checkudata(L, 1, "nerv.point");
if (lua_isnumber(L, 2))
{
int d = luaL_checkinteger(L, 2);
double v = luaL_checknumber(L, 3);
if (0 <= d && d < 100)
p->arr[d] = v;
lua_pushboolean(L, 1);
return 1;
}
else
{
lua_pushboolean(L, 0);
return 1;
}
}
static int point_index(lua_State *L) {
Point *p = luaT_checkudata(L, 1, "nerv.point");
if (lua_isnumber(L, 2))
{
int d = luaL_checkinteger(L, 2);
if (0 <= d && d < 100)
lua_pushnumber(L, p->arr[d]);
lua_pushboolean(L, 1);
return 2;
}
else
{
lua_pushboolean(L, 0);
return 1;
}
}
int point_new(lua_State *L) {
Point *self = (Point *)malloc(sizeof(Point));
self->x = 0;
self->y = 0;
luaT_pushudata(L, self, "nerv.point");
return 1;
}
static const luaL_Reg point[] = {
{"get_sinx", point_get_sinx},
{"set_x", point_set_x},
{"get_y", point_get_y},
{"__index__", point_index},
{"__newindex__", point_newindex},
{NULL, NULL}
};
void nerv_point_init(lua_State *L) {
luaT_newmetatable(L, "nerv.point", NULL, point_new, NULL, NULL);
luaL_register(L, NULL, point);
lua_pop(L, 1);
}
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