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/* jshint esversion: 6 */
"use strict";
const assert = require('assert');
const lua = require('./lua.js');
const lapi = require('./lapi.js');
const lauxlib = require('./lauxlib.js');
const lstate = require('./lstate.js');
const ldo = require('./ldo.js');
const ldebug = require('./ldebug.js');
const llimit = require('./llimit.js');
const CT = lua.constant_types;
const TS = lua.thread_status;
const math_abs = function(L) {
if (lapi.lua_isinteger(L, 1))
lapi.lua_pushinteger(L, Math.abs(lapi.lua_tointeger(L, 1)));
else
lapi.lua_pushnumber(L, Math.abs(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_sin = function(L) {
lapi.lua_pushnumber(L, Math.sin(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_cos = function(L) {
lapi.lua_pushnumber(L, Math.cos(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_tan = function(L) {
lapi.lua_pushnumber(L, Math.tan(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_asin = function(L) {
lapi.lua_pushnumber(L, Math.asin(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_acos = function(L) {
lapi.lua_pushnumber(L, Math.acos(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_atan = function(L) {
lapi.lua_pushnumber(L, Math.atan(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_toint = function(L) {
let n = lapi.lua_tointegerx(L, 1)
if (n !== false)
lapi.lua_pushinteger(L, n);
else {
lauxlib.luaL_checkany(L, 1);
lapi.lua_pushnil(L); /* value is not convertible to integer */
}
return 1;
};
const pushnumint = function(L, d) {
let n = luaconf.lua_numbertointeger(d);
if (n !== false) /* does 'd' fit in an integer? */
lapi.lua_pushinteger(L, n); /* result is integer */
else
lapi.lua_pushnumber(L, d); /* result is float */
};
const math_floor = function(L) {
if (lapi.lua_isinteger(L, 1))
lapi.lua_settop(L, 1);
else
pushnumint(L, lauxlib.luaL_checknumber(L, 1));
return 1;
};
const math_ceil = function(L) {
if (lapi.lua_isinteger(L, 1))
lapi.lua_settop(L, 1);
else
pushnumint(L, Math.ceil(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_sqrt = function(L) {
lapi.lua_pushnumber(L, Math.sqrt(lauxlib.luaL_checknumber(L, 1)));
};
const math_ult = function(L) {
let a = lauxlib.luaL_checkinteger(L, 1);
let b = lauxlib.luaL_checkinteger(L, 2);
lapi.lua_pushboolean(L, Math.abs(a) < Math.abs(b));
return 1;
};
const math_log = function(L) {
let x = lauxlib.luaL_checknumber(L, 1);
if (lapi.lua_isnoneornil(L, 2))
res = Math.log(x);
else {
let base = lauxlib.luaL_checknumber(L, 2);
if (base === 2)
res = Math.log2(x);
else if (base === 10)
res = Math.log10(x);
else
res = Math.log(x)/Math.log(base);
}
lapi.lua_pushnumber(L, res);
return 1;
};
const math_exp = function(L) {
lapi.lua_pushnumber(L, Math.exp(lauxlib.luaL_checknumber(L, 1)));
return 1;
};
const math_deg = function(L) {
lapi.lua_pushnumber(L, lauxlib.luaL_checknumber(L, 1) * (180 / Math.PI));
return 1;
};
const math_rad = function(L) {
lapi.lua_pushnumber(L, lauxlib.luaL_checknumber(L, 1) * (Math.PI / 180));
};
const math_min = function(L) {
let n = lapi.lua_gettop(L); /* number of arguments */
let imin = 1; /* index of current minimum value */
lauxlib.luaL_argcheck(L, n >= 1, 1, "value expected");
for (let i = 2; i <= n; i++){
if (lapi.lua_compare(L, i, imin, lua.LUA_OPLT))
imin = i;
}
lapi.lua_pushvalue(L, imin);
return 1;
};
const math_max = function(L) {
let n = lapi.lua_gettop(L); /* number of arguments */
let imax = 1; /* index of current minimum value */
lauxlib.luaL_argcheck(L, n >= 1, 1, "value expected");
for (let i = 2; i <= n; i++){
if (lapi.lua_compare(L, imax, i, lua.LUA_OPLT))
imax = i;
}
lapi.lua_pushvalue(L, imax);
return 1;
};
const math_type = function(L) {
if (lapi.lua_type(L, 1) === CT.LUA_TNUMBER) {
if (lapi.lua_isinteger(L, 1))
lapi.lua_pushliteral(L, "integer");
else
lapi.lua_pushliteral(L, "float");
} else {
lauxlib.luaL_checkany(L, 1);
lapi.lua_pushnil(L);
}
return 1;
};
const mathlib = {
"abs": math_abs,
"acos": math_acos,
"asin": math_asin,
"atan": math_atan,
"ceil": math_ceil,
"cos": math_cos,
"deg": math_deg,
"exp": math_exp,
"floor": math_floor,
"log": math_log,
"max": math_max,
"min": math_min,
"rad": math_rad,
"sin": math_sin,
"sqrt": math_sqrt,
"sqrt": math_sqrt,
"tan": math_tan,
"tointeger": math_toint,
"type": math_type,
"ult": math_ult
};
const luaopen_math = function(L) {
lauxlib.luaL_newlib(L, mathlib);
lapi.lua_pushnumber(L, Math.PI);
lapi.lua_setfield(L, -2, "pi");
lapi.lua_pushnumber(L, Number.MAX_VALUE);
lapi.lua_setfield(L, -2, "huge");
lapi.lua_pushnumber(L, Number.MAX_SAFE_INTEGER);
lapi.lua_setfield(L, -2, "maxinteger");
lapi.lua_pushnumber(L, Number.MIN_SAFE_INTEGER);
lapi.lua_setfield(L, -2, "mininteger");
return 1;
};
module.exports.luaopen_math = luaopen_math;
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