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authorGravatar Hanspeter Portner <dev@open-music-kontrollers.ch>2019-07-07 12:04:43 +0200
committerGravatar Hanspeter Portner <dev@open-music-kontrollers.ch>2019-07-07 12:04:43 +0200
commit8f93429df20d4d7bb5df9526e73a0ba79f14874e (patch)
tree66a3db8380e889556541c84255697654a128f4d2 /lua-5.3.5/lmathlib.c
parent4595dae208687386b5d78090d188a62c460111bd (diff)
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Update lua to version 5.3.5.
Diffstat (limited to 'lua-5.3.5/lmathlib.c')
-rw-r--r--lua-5.3.5/lmathlib.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/lua-5.3.5/lmathlib.c b/lua-5.3.5/lmathlib.c
new file mode 100644
index 0000000..7ef7e59
--- /dev/null
+++ b/lua-5.3.5/lmathlib.c
@@ -0,0 +1,410 @@
+/*
+** $Id: lmathlib.c,v 1.119.1.1 2017/04/19 17:20:42 roberto Exp $
+** Standard mathematical library
+** See Copyright Notice in lua.h
+*/
+
+#define lmathlib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include <stdlib.h>
+#include <math.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#undef PI
+#define PI (l_mathop(3.141592653589793238462643383279502884))
+
+
+#if !defined(l_rand) /* { */
+#if defined(LUA_USE_POSIX)
+#define l_rand() random()
+#define l_srand(x) srandom(x)
+#define L_RANDMAX 2147483647 /* (2^31 - 1), following POSIX */
+#else
+#define l_rand() rand()
+#define l_srand(x) srand(x)
+#define L_RANDMAX RAND_MAX
+#endif
+#endif /* } */
+
+
+static int math_abs (lua_State *L) {
+ if (lua_isinteger(L, 1)) {
+ lua_Integer n = lua_tointeger(L, 1);
+ if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n);
+ lua_pushinteger(L, n);
+ }
+ else
+ lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_sin (lua_State *L) {
+ lua_pushnumber(L, l_mathop(sin)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_cos (lua_State *L) {
+ lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_tan (lua_State *L) {
+ lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_asin (lua_State *L) {
+ lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_acos (lua_State *L) {
+ lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_atan (lua_State *L) {
+ lua_Number y = luaL_checknumber(L, 1);
+ lua_Number x = luaL_optnumber(L, 2, 1);
+ lua_pushnumber(L, l_mathop(atan2)(y, x));
+ return 1;
+}
+
+
+static int math_toint (lua_State *L) {
+ int valid;
+ lua_Integer n = lua_tointegerx(L, 1, &valid);
+ if (valid)
+ lua_pushinteger(L, n);
+ else {
+ luaL_checkany(L, 1);
+ lua_pushnil(L); /* value is not convertible to integer */
+ }
+ return 1;
+}
+
+
+static void pushnumint (lua_State *L, lua_Number d) {
+ lua_Integer n;
+ if (lua_numbertointeger(d, &n)) /* does 'd' fit in an integer? */
+ lua_pushinteger(L, n); /* result is integer */
+ else
+ lua_pushnumber(L, d); /* result is float */
+}
+
+
+static int math_floor (lua_State *L) {
+ if (lua_isinteger(L, 1))
+ lua_settop(L, 1); /* integer is its own floor */
+ else {
+ lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1));
+ pushnumint(L, d);
+ }
+ return 1;
+}
+
+
+static int math_ceil (lua_State *L) {
+ if (lua_isinteger(L, 1))
+ lua_settop(L, 1); /* integer is its own ceil */
+ else {
+ lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1));
+ pushnumint(L, d);
+ }
+ return 1;
+}
+
+
+static int math_fmod (lua_State *L) {
+ if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) {
+ lua_Integer d = lua_tointeger(L, 2);
+ if ((lua_Unsigned)d + 1u <= 1u) { /* special cases: -1 or 0 */
+ luaL_argcheck(L, d != 0, 2, "zero");
+ lua_pushinteger(L, 0); /* avoid overflow with 0x80000... / -1 */
+ }
+ else
+ lua_pushinteger(L, lua_tointeger(L, 1) % d);
+ }
+ else
+ lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
+ luaL_checknumber(L, 2)));
+ return 1;
+}
+
+
+/*
+** next function does not use 'modf', avoiding problems with 'double*'
+** (which is not compatible with 'float*') when lua_Number is not
+** 'double'.
+*/
+static int math_modf (lua_State *L) {
+ if (lua_isinteger(L ,1)) {
+ lua_settop(L, 1); /* number is its own integer part */
+ lua_pushnumber(L, 0); /* no fractional part */
+ }
+ else {
+ lua_Number n = luaL_checknumber(L, 1);
+ /* integer part (rounds toward zero) */
+ lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n);
+ pushnumint(L, ip);
+ /* fractional part (test needed for inf/-inf) */
+ lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip));
+ }
+ return 2;
+}
+
+
+static int math_sqrt (lua_State *L) {
+ lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+
+static int math_ult (lua_State *L) {
+ lua_Integer a = luaL_checkinteger(L, 1);
+ lua_Integer b = luaL_checkinteger(L, 2);
+ lua_pushboolean(L, (lua_Unsigned)a < (lua_Unsigned)b);
+ return 1;
+}
+
+static int math_log (lua_State *L) {
+ lua_Number x = luaL_checknumber(L, 1);
+ lua_Number res;
+ if (lua_isnoneornil(L, 2))
+ res = l_mathop(log)(x);
+ else {
+ lua_Number base = luaL_checknumber(L, 2);
+#if !defined(LUA_USE_C89)
+ if (base == l_mathop(2.0))
+ res = l_mathop(log2)(x); else
+#endif
+ if (base == l_mathop(10.0))
+ res = l_mathop(log10)(x);
+ else
+ res = l_mathop(log)(x)/l_mathop(log)(base);
+ }
+ lua_pushnumber(L, res);
+ return 1;
+}
+
+static int math_exp (lua_State *L) {
+ lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_deg (lua_State *L) {
+ lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI));
+ return 1;
+}
+
+static int math_rad (lua_State *L) {
+ lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0)));
+ return 1;
+}
+
+
+static int math_min (lua_State *L) {
+ int n = lua_gettop(L); /* number of arguments */
+ int imin = 1; /* index of current minimum value */
+ int i;
+ luaL_argcheck(L, n >= 1, 1, "value expected");
+ for (i = 2; i <= n; i++) {
+ if (lua_compare(L, i, imin, LUA_OPLT))
+ imin = i;
+ }
+ lua_pushvalue(L, imin);
+ return 1;
+}
+
+
+static int math_max (lua_State *L) {
+ int n = lua_gettop(L); /* number of arguments */
+ int imax = 1; /* index of current maximum value */
+ int i;
+ luaL_argcheck(L, n >= 1, 1, "value expected");
+ for (i = 2; i <= n; i++) {
+ if (lua_compare(L, imax, i, LUA_OPLT))
+ imax = i;
+ }
+ lua_pushvalue(L, imax);
+ return 1;
+}
+
+/*
+** This function uses 'double' (instead of 'lua_Number') to ensure that
+** all bits from 'l_rand' can be represented, and that 'RANDMAX + 1.0'
+** will keep full precision (ensuring that 'r' is always less than 1.0.)
+*/
+static int math_random (lua_State *L) {
+ lua_Integer low, up;
+ double r = (double)l_rand() * (1.0 / ((double)L_RANDMAX + 1.0));
+ switch (lua_gettop(L)) { /* check number of arguments */
+ case 0: { /* no arguments */
+ lua_pushnumber(L, (lua_Number)r); /* Number between 0 and 1 */
+ return 1;
+ }
+ case 1: { /* only upper limit */
+ low = 1;
+ up = luaL_checkinteger(L, 1);
+ break;
+ }
+ case 2: { /* lower and upper limits */
+ low = luaL_checkinteger(L, 1);
+ up = luaL_checkinteger(L, 2);
+ break;
+ }
+ default: return luaL_error(L, "wrong number of arguments");
+ }
+ /* random integer in the interval [low, up] */
+ luaL_argcheck(L, low <= up, 1, "interval is empty");
+ luaL_argcheck(L, low >= 0 || up <= LUA_MAXINTEGER + low, 1,
+ "interval too large");
+ r *= (double)(up - low) + 1.0;
+ lua_pushinteger(L, (lua_Integer)r + low);
+ return 1;
+}
+
+
+static int math_randomseed (lua_State *L) {
+ l_srand((unsigned int)(lua_Integer)luaL_checknumber(L, 1));
+ (void)l_rand(); /* discard first value to avoid undesirable correlations */
+ return 0;
+}
+
+
+static int math_type (lua_State *L) {
+ if (lua_type(L, 1) == LUA_TNUMBER) {
+ if (lua_isinteger(L, 1))
+ lua_pushliteral(L, "integer");
+ else
+ lua_pushliteral(L, "float");
+ }
+ else {
+ luaL_checkany(L, 1);
+ lua_pushnil(L);
+ }
+ return 1;
+}
+
+
+/*
+** {==================================================================
+** Deprecated functions (for compatibility only)
+** ===================================================================
+*/
+#if defined(LUA_COMPAT_MATHLIB)
+
+static int math_cosh (lua_State *L) {
+ lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_sinh (lua_State *L) {
+ lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_tanh (lua_State *L) {
+ lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+static int math_pow (lua_State *L) {
+ lua_Number x = luaL_checknumber(L, 1);
+ lua_Number y = luaL_checknumber(L, 2);
+ lua_pushnumber(L, l_mathop(pow)(x, y));
+ return 1;
+}
+
+static int math_frexp (lua_State *L) {
+ int e;
+ lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
+ lua_pushinteger(L, e);
+ return 2;
+}
+
+static int math_ldexp (lua_State *L) {
+ lua_Number x = luaL_checknumber(L, 1);
+ int ep = (int)luaL_checkinteger(L, 2);
+ lua_pushnumber(L, l_mathop(ldexp)(x, ep));
+ return 1;
+}
+
+static int math_log10 (lua_State *L) {
+ lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
+ return 1;
+}
+
+#endif
+/* }================================================================== */
+
+
+
+static const luaL_Reg 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},
+ {"tointeger", math_toint},
+ {"floor", math_floor},
+ {"fmod", math_fmod},
+ {"ult", math_ult},
+ {"log", math_log},
+ {"max", math_max},
+ {"min", math_min},
+ {"modf", math_modf},
+ {"rad", math_rad},
+ {"random", math_random},
+ {"randomseed", math_randomseed},
+ {"sin", math_sin},
+ {"sqrt", math_sqrt},
+ {"tan", math_tan},
+ {"type", math_type},
+#if defined(LUA_COMPAT_MATHLIB)
+ {"atan2", math_atan},
+ {"cosh", math_cosh},
+ {"sinh", math_sinh},
+ {"tanh", math_tanh},
+ {"pow", math_pow},
+ {"frexp", math_frexp},
+ {"ldexp", math_ldexp},
+ {"log10", math_log10},
+#endif
+ /* placeholders */
+ {"pi", NULL},
+ {"huge", NULL},
+ {"maxinteger", NULL},
+ {"mininteger", NULL},
+ {NULL, NULL}
+};
+
+
+/*
+** Open math library
+*/
+LUAMOD_API int luaopen_math (lua_State *L) {
+ luaL_newlib(L, mathlib);
+ lua_pushnumber(L, PI);
+ lua_setfield(L, -2, "pi");
+ lua_pushnumber(L, (lua_Number)HUGE_VAL);
+ lua_setfield(L, -2, "huge");
+ lua_pushinteger(L, LUA_MAXINTEGER);
+ lua_setfield(L, -2, "maxinteger");
+ lua_pushinteger(L, LUA_MININTEGER);
+ lua_setfield(L, -2, "mininteger");
+ return 1;
+}
+