ref: 8f62ea10a0af68e56d5c00720523ebcba13c2e6a
dir: /jsmath.c/
#include "jsi.h" #include "jsvalue.h" #include "jsbuiltin.h" static void Math_abs(js_State *J) { js_pushnumber(J, fabs(js_tonumber(J, 1))); } static void Math_acos(js_State *J) { js_pushnumber(J, acos(js_tonumber(J, 1))); } static void Math_asin(js_State *J) { js_pushnumber(J, asin(js_tonumber(J, 1))); } static void Math_atan(js_State *J) { js_pushnumber(J, atan(js_tonumber(J, 1))); } static void Math_atan2(js_State *J) { double y = js_tonumber(J, 1); double x = js_tonumber(J, 2); js_pushnumber(J, atan2(y, x)); } static void Math_ceil(js_State *J) { js_pushnumber(J, ceil(js_tonumber(J, 1))); } static void Math_cos(js_State *J) { js_pushnumber(J, cos(js_tonumber(J, 1))); } static void Math_exp(js_State *J) { js_pushnumber(J, exp(js_tonumber(J, 1))); } static void Math_floor(js_State *J) { js_pushnumber(J, floor(js_tonumber(J, 1))); } static void Math_log(js_State *J) { js_pushnumber(J, log(js_tonumber(J, 1))); } static void Math_pow(js_State *J) { double x = js_tonumber(J, 1); double y = js_tonumber(J, 2); if (!isfinite(y) && fabs(x) == 1) js_pushnumber(J, NAN); else js_pushnumber(J, pow(x,y)); } static void Math_random(js_State *J) { js_pushnumber(J, rand() / (RAND_MAX + 1.0)); } static double do_round(double x) { if (isnan(x)) return x; if (isinf(x)) return x; if (x == 0) return x; if (x > 0 && x < 0.5) return 0; if (x < 0 && x >= -0.5) return -0; return floor(x + 0.5); } static void Math_round(js_State *J) { double x = js_tonumber(J, 1); js_pushnumber(J, do_round(x)); } static void Math_sin(js_State *J) { js_pushnumber(J, sin(js_tonumber(J, 1))); } static void Math_sqrt(js_State *J) { js_pushnumber(J, sqrt(js_tonumber(J, 1))); } static void Math_tan(js_State *J) { js_pushnumber(J, tan(js_tonumber(J, 1))); } static void Math_max(js_State *J) { int i, n = js_gettop(J); double x = -INFINITY; for (i = 1; i < n; ++i) { double y = js_tonumber(J, i); if (isnan(y)) { x = y; break; } if (signbit(x) == signbit(y)) x = x > y ? x : y; else if (signbit(x)) x = y; } js_pushnumber(J, x); } static void Math_min(js_State *J) { int i, n = js_gettop(J); double x = INFINITY; for (i = 1; i < n; ++i) { double y = js_tonumber(J, i); if (isnan(y)) { x = y; break; } if (signbit(x) == signbit(y)) x = x < y ? x : y; else if (signbit(y)) x = y; } js_pushnumber(J, x); } void jsB_initmath(js_State *J) { js_pushobject(J, jsV_newobject(J, JS_CMATH, J->Object_prototype)); { jsB_propn(J, "E", 2.7182818284590452354); jsB_propn(J, "LN10", 2.302585092994046); jsB_propn(J, "LN2", 0.6931471805599453); jsB_propn(J, "LOG2E", 1.4426950408889634); jsB_propn(J, "LOG10E", 0.4342944819032518); jsB_propn(J, "PI", 3.1415926535897932); jsB_propn(J, "SQRT1_2", 0.7071067811865476); jsB_propn(J, "SQRT2", 1.4142135623730951); jsB_propf(J, "Math.abs", Math_abs, 1); jsB_propf(J, "Math.acos", Math_acos, 1); jsB_propf(J, "Math.asin", Math_asin, 1); jsB_propf(J, "Math.atan", Math_atan, 1); jsB_propf(J, "Math.atan2", Math_atan2, 2); jsB_propf(J, "Math.ceil", Math_ceil, 1); jsB_propf(J, "Math.cos", Math_cos, 1); jsB_propf(J, "Math.exp", Math_exp, 1); jsB_propf(J, "Math.floor", Math_floor, 1); jsB_propf(J, "Math.log", Math_log, 1); jsB_propf(J, "Math.max", Math_max, 0); /* 2 */ jsB_propf(J, "Math.min", Math_min, 0); /* 2 */ jsB_propf(J, "Math.pow", Math_pow, 2); jsB_propf(J, "Math.random", Math_random, 0); jsB_propf(J, "Math.round", Math_round, 1); jsB_propf(J, "Math.sin", Math_sin, 1); jsB_propf(J, "Math.sqrt", Math_sqrt, 1); jsB_propf(J, "Math.tan", Math_tan, 1); } js_defglobal(J, "Math", JS_DONTENUM); }