AppPkg: Add the Lua interpreter and library.

[mirror_edk2.git] / AppPkg / Applications / Lua / src / lmathlib.c

/*\r
** $Id: lmathlib.c,v 1.83.1.1 2013/04/12 18:48:47 roberto Exp $\r
** Standard mathematical library\r
** See Copyright Notice in lua.h\r
*/\r
\r
\r
#include <stdlib.h>\r
#include <math.h>\r
\r
#define lmathlib_c\r
#define LUA_LIB\r
\r
#include "lua.h"\r
\r
#include "lauxlib.h"\r
#include "lualib.h"\r
\r
\r
#undef PI\r
#define PI  ((lua_Number)(3.1415926535897932384626433832795))\r
#define RADIANS_PER_DEGREE  ((lua_Number)(PI/180.0))\r
\r
\r
\r
static int math_abs (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_sin (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(sin)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_sinh (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_cos (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_cosh (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_tan (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_tanh (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_asin (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_acos (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_atan (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(atan)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_atan2 (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(atan2)(luaL_checknumber(L, 1),\r
                                luaL_checknumber(L, 2)));\r
  return 1;\r
}\r
\r
static int math_ceil (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(ceil)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_floor (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(floor)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_fmod (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),\r
                               luaL_checknumber(L, 2)));\r
  return 1;\r
}\r
\r
static int math_modf (lua_State *L) {\r
  lua_Number ip;\r
  lua_Number fp = l_mathop(modf)(luaL_checknumber(L, 1), &ip);\r
  lua_pushnumber(L, ip);\r
  lua_pushnumber(L, fp);\r
  return 2;\r
}\r
\r
static int math_sqrt (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_pow (lua_State *L) {\r
  lua_Number x = luaL_checknumber(L, 1);\r
  lua_Number y = luaL_checknumber(L, 2);\r
  lua_pushnumber(L, l_mathop(pow)(x, y));\r
  return 1;\r
}\r
\r
static int math_log (lua_State *L) {\r
  lua_Number x = luaL_checknumber(L, 1);\r
  lua_Number res;\r
  if (lua_isnoneornil(L, 2))\r
    res = l_mathop(log)(x);\r
  else {\r
    lua_Number base = luaL_checknumber(L, 2);\r
    if (base == (lua_Number)10.0) res = l_mathop(log10)(x);\r
    else res = l_mathop(log)(x)/l_mathop(log)(base);\r
  }\r
  lua_pushnumber(L, res);\r
  return 1;\r
}\r
\r
#if defined(LUA_COMPAT_LOG10)\r
static int math_log10 (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
#endif\r
\r
static int math_exp (lua_State *L) {\r
  lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));\r
  return 1;\r
}\r
\r
static int math_deg (lua_State *L) {\r
  lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);\r
  return 1;\r
}\r
\r
static int math_rad (lua_State *L) {\r
  lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);\r
  return 1;\r
}\r
\r
static int math_frexp (lua_State *L) {\r
  int e;\r
  lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));\r
  lua_pushinteger(L, e);\r
  return 2;\r
}\r
\r
static int math_ldexp (lua_State *L) {\r
  lua_Number x = luaL_checknumber(L, 1);\r
  int ep = luaL_checkint(L, 2);\r
  lua_pushnumber(L, l_mathop(ldexp)(x, ep));\r
  return 1;\r
}\r
\r
\r
\r
static int math_min (lua_State *L) {\r
  int n = lua_gettop(L);  /* number of arguments */\r
  lua_Number dmin = luaL_checknumber(L, 1);\r
  int i;\r
  for (i=2; i<=n; i++) {\r
    lua_Number d = luaL_checknumber(L, i);\r
    if (d < dmin)\r
      dmin = d;\r
  }\r
  lua_pushnumber(L, dmin);\r
  return 1;\r
}\r
\r
\r
static int math_max (lua_State *L) {\r
  int n = lua_gettop(L);  /* number of arguments */\r
  lua_Number dmax = luaL_checknumber(L, 1);\r
  int i;\r
  for (i=2; i<=n; i++) {\r
    lua_Number d = luaL_checknumber(L, i);\r
    if (d > dmax)\r
      dmax = d;\r
  }\r
  lua_pushnumber(L, dmax);\r
  return 1;\r
}\r
\r
\r
static int math_random (lua_State *L) {\r
  /* the `%' avoids the (rare) case of r==1, and is needed also because on\r
     some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */\r
  lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;\r
  switch (lua_gettop(L)) {  /* check number of arguments */\r
    case 0: {  /* no arguments */\r
      lua_pushnumber(L, r);  /* Number between 0 and 1 */\r
      break;\r
    }\r
    case 1: {  /* only upper limit */\r
      lua_Number u = luaL_checknumber(L, 1);\r
      luaL_argcheck(L, (lua_Number)1.0 <= u, 1, "interval is empty");\r
      lua_pushnumber(L, l_mathop(floor)(r*u) + (lua_Number)(1.0));  /* [1, u] */\r
      break;\r
    }\r
    case 2: {  /* lower and upper limits */\r
      lua_Number l = luaL_checknumber(L, 1);\r
      lua_Number u = luaL_checknumber(L, 2);\r
      luaL_argcheck(L, l <= u, 2, "interval is empty");\r
      lua_pushnumber(L, l_mathop(floor)(r*(u-l+1)) + l);  /* [l, u] */\r
      break;\r
    }\r
    default: return luaL_error(L, "wrong number of arguments");\r
  }\r
  return 1;\r
}\r
\r
\r
static int math_randomseed (lua_State *L) {\r
  srand(luaL_checkunsigned(L, 1));\r
  (void)rand(); /* discard first value to avoid undesirable correlations */\r
  return 0;\r
}\r
\r
\r
static const luaL_Reg mathlib[] = {\r
  {"abs",   math_abs},\r
  {"acos",  math_acos},\r
  {"asin",  math_asin},\r
  {"atan2", math_atan2},\r
  {"atan",  math_atan},\r
  {"ceil",  math_ceil},\r
  {"cosh",   math_cosh},\r
  {"cos",   math_cos},\r
  {"deg",   math_deg},\r
  {"exp",   math_exp},\r
  {"floor", math_floor},\r
  {"fmod",   math_fmod},\r
  {"frexp", math_frexp},\r
  {"ldexp", math_ldexp},\r
#if defined(LUA_COMPAT_LOG10)\r
  {"log10", math_log10},\r
#endif\r
  {"log",   math_log},\r
  {"max",   math_max},\r
  {"min",   math_min},\r
  {"modf",   math_modf},\r
  {"pow",   math_pow},\r
  {"rad",   math_rad},\r
  {"random",     math_random},\r
  {"randomseed", math_randomseed},\r
  {"sinh",   math_sinh},\r
  {"sin",   math_sin},\r
  {"sqrt",  math_sqrt},\r
  {"tanh",   math_tanh},\r
  {"tan",   math_tan},\r
  {NULL, NULL}\r
};\r
\r
\r
/*\r
** Open math library\r
*/\r
LUAMOD_API int luaopen_math (lua_State *L) {\r
  luaL_newlib(L, mathlib);\r
  lua_pushnumber(L, PI);\r
  lua_setfield(L, -2, "pi");\r
  lua_pushnumber(L, HUGE_VAL);\r
  lua_setfield(L, -2, "huge");\r
  return 1;\r
}\r
\r