/* ** $Id: lmathlib.c,v 1.67.1.1 2007/12/27 13:02:25 roberto Exp $ ** Standard mathematical library ** See Copyright Notice in lua.h */ #if 0 #include #include #endif #define lmathlib_c #define LUA_LIB #include "lua.h" #include "lauxlib.h" #include "lualib.h" #undef PI #define PI (3.14159265358979323846) #define RADIANS_PER_DEGREE (PI/180.0) #define DEGREES_PER_RADIAN (180.0/PI) static int math_abs (lua_State *L) { /* Was: lua_pushnumber(L, fabs(luaL_checknumber(L, 1))); */ lua_Number n = luaL_checknumber(L, 1); lua_pushnumber(L, n < 0 ? -n : n); return 1; } #if 0 static int math_sin (lua_State *L) { lua_pushnumber(L, sin(luaL_checknumber(L, 1))); return 1; } static int math_sinh (lua_State *L) { lua_pushnumber(L, sinh(luaL_checknumber(L, 1))); return 1; } static int math_cos (lua_State *L) { lua_pushnumber(L, cos(luaL_checknumber(L, 1))); return 1; } static int math_cosh (lua_State *L) { lua_pushnumber(L, cosh(luaL_checknumber(L, 1))); return 1; } static int math_tan (lua_State *L) { lua_pushnumber(L, tan(luaL_checknumber(L, 1))); return 1; } static int math_tanh (lua_State *L) { lua_pushnumber(L, tanh(luaL_checknumber(L, 1))); return 1; } static int math_asin (lua_State *L) { lua_pushnumber(L, asin(luaL_checknumber(L, 1))); return 1; } static int math_acos (lua_State *L) { lua_pushnumber(L, acos(luaL_checknumber(L, 1))); return 1; } static int math_atan (lua_State *L) { lua_pushnumber(L, atan(luaL_checknumber(L, 1))); return 1; } static int math_atan2 (lua_State *L) { lua_pushnumber(L, atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2))); return 1; } static int math_ceil (lua_State *L) { lua_pushnumber(L, ceil(luaL_checknumber(L, 1))); return 1; } static int math_floor (lua_State *L) { lua_pushnumber(L, floor(luaL_checknumber(L, 1))); return 1; } #endif static int math_fmod (lua_State *L) { /* Was: lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2))); */ lua_Number n = luaL_checknumber(L, 1); lua_Number d = luaL_checknumber(L, 2); luaL_argcheck(L, d != 0, 2, "division by zero"); lua_pushnumber(L, n % d); return 1; } #if 0 static int math_modf (lua_State *L) { double ip; double fp = modf(luaL_checknumber(L, 1), &ip); lua_pushnumber(L, ip); lua_pushnumber(L, fp); return 2; } static int math_sqrt (lua_State *L) { lua_pushnumber(L, sqrt(luaL_checknumber(L, 1))); return 1; } static int math_pow (lua_State *L) { lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2))); return 1; } static int math_log (lua_State *L) { lua_pushnumber(L, log(luaL_checknumber(L, 1))); return 1; } static int math_log10 (lua_State *L) { lua_pushnumber(L, log10(luaL_checknumber(L, 1))); return 1; } static int math_exp (lua_State *L) { lua_pushnumber(L, exp(luaL_checknumber(L, 1))); return 1; } #endif static int math_deg (lua_State *L) { lua_pushnumber(L, luaL_checknumber(L, 1)*DEGREES_PER_RADIAN); return 1; } static int math_rad (lua_State *L) { lua_pushnumber(L, (luaL_checknumber(L, 1)*100)/(DEGREES_PER_RADIAN*100)); return 1; } #if 0 static int math_frexp (lua_State *L) { int e; lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e)); lua_pushinteger(L, e); return 2; } static int math_ldexp (lua_State *L) { lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2))); return 1; } #endif static int math_min (lua_State *L) { int n = lua_gettop(L); /* number of arguments */ lua_Number dmin = luaL_checknumber(L, 1); int i; for (i=2; i<=n; i++) { lua_Number d = luaL_checknumber(L, i); if (d < dmin) dmin = d; } lua_pushnumber(L, dmin); return 1; } static int math_max (lua_State *L) { int n = lua_gettop(L); /* number of arguments */ lua_Number dmax = luaL_checknumber(L, 1); int i; for (i=2; i<=n; i++) { lua_Number d = luaL_checknumber(L, i); if (d > dmax) dmax = d; } lua_pushnumber(L, dmax); return 1; } static int math_random (lua_State *L) { /* We're not SunOS */ lua_Number r = (lua_Number)(rb->rand()); switch (lua_gettop(L)) { /* check number of arguments */ case 0: { /* no arguments */ lua_pushnumber(L, r); /* Number between 0 and RAND_MAX */ break; } case 1: { /* only upper limit */ int u = luaL_checkint(L, 1); luaL_argcheck(L, 1<=u, 1, "interval is empty"); lua_pushnumber(L, 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, r%(u-l+1)+l); /* int between `l' and `u' */ break; } default: return luaL_error(L, "wrong number of arguments"); } return 1; } static int math_randomseed (lua_State *L) { rb->srand(luaL_checkint(L, 1)); return 0; } static int math_ident (lua_State *L) { /* ROCKLUA ADDED */ /* Ceil & floor Doesn't change anything in fixed point arithmetic */ lua_pushnumber(L, luaL_checknumber(L, 1)); return 1; } static const luaL_Reg mathlib[] = { {"abs", math_abs}, #if 0 {"acos", math_acos}, {"asin", math_asin}, {"atan2", math_atan2}, {"atan", math_atan}, {"ceil", math_ceil}, {"cosh", math_cosh}, {"cos", math_cos}, #endif {"deg", math_deg}, #if 0 {"exp", math_exp}, {"floor", math_floor}, #endif {"fmod", math_fmod}, #if 0 {"frexp", math_frexp}, {"ldexp", math_ldexp}, {"log10", math_log10}, {"log", math_log}, #endif {"max", math_max}, {"min", math_min}, #if 0 {"modf", math_modf}, {"pow", math_pow}, #endif {"rad", math_rad}, {"random", math_random}, {"randomseed", math_randomseed}, #if 0 {"sinh", math_sinh}, {"sin", math_sin}, {"sqrt", math_sqrt}, {"tanh", math_tanh}, {"tan", math_tan}, #endif {"ceil", math_ident}, {"floor", math_ident}, {NULL, NULL} }; /* ** Open math library */ LUALIB_API int luaopen_math (lua_State *L) { luaL_register(L, LUA_MATHLIBNAME, mathlib); #if 0 /* No use in adding floating point constants when there's no FP */ lua_pushnumber(L, PI); lua_setfield(L, -2, "pi"); lua_pushnumber(L, HUGE_VAL); lua_setfield(L, -2, "huge"); #if defined(LUA_COMPAT_MOD) lua_getfield(L, -1, "fmod"); lua_setfield(L, -2, "mod"); #endif #endif return 1; }