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authorBenoit Giannangeli <giann008@gmail.com>2017-02-26 08:42:11 +0100
committerBenoit Giannangeli <giann008@gmail.com>2017-02-26 08:42:11 +0100
commit616d80301734074e55cedec8ba187b5cab89ea95 (patch)
tree127265d85dc6bd94556899c0cd40102db114f219 /src/lmathlib.js
parent9e2ace863b568ed7c3ef42bf687c7cafd3a71bb7 (diff)
downloadfengari-616d80301734074e55cedec8ba187b5cab89ea95.tar.gz
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math.sqrt, math.ult, math.log, math.exp, math.deg, math.rad, ...
math.min/max, math.type
Diffstat (limited to 'src/lmathlib.js')
-rw-r--r--src/lmathlib.js99
1 files changed, 98 insertions, 1 deletions
diff --git a/src/lmathlib.js b/src/lmathlib.js
index 9921cc9..f4cc978 100644
--- a/src/lmathlib.js
+++ b/src/lmathlib.js
@@ -89,6 +89,85 @@ const math_ceil = function(L) {
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,
@@ -96,14 +175,32 @@ const mathlib = {
"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
+ "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;
};