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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013-2017 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/builtin.h"
#include "py/runtime.h"
#include "py/runtime.h"
#if MICROPY_PY_BUILTINS_FLOAT && MICROPY_PY_MATH
#include <math.h>
// M_PI is not part of the math.h standard and may not be defined
// And by defining our own we can ensure it uses the correct const format.
#define MP_PI MICROPY_FLOAT_CONST(3.14159265358979323846)
STATIC NORETURN void math_error(void) {
mp_raise_ValueError("math domain error");
}
STATIC mp_obj_t math_generic_1(mp_obj_t x_obj, mp_float_t (*f)(mp_float_t)) {
mp_float_t x = mp_obj_get_float(x_obj);
mp_float_t ans = f(x);
if ((isnan(ans) && !isnan(x)) || (isinf(ans) && !isinf(x))) {
math_error();
}
return mp_obj_new_float(ans);
}
STATIC mp_obj_t math_generic_2(mp_obj_t x_obj, mp_obj_t y_obj, mp_float_t (*f)(mp_float_t, mp_float_t)) {
mp_float_t x = mp_obj_get_float(x_obj);
mp_float_t y = mp_obj_get_float(y_obj);
mp_float_t ans = f(x, y);
if ((isnan(ans) && !isnan(x) && !isnan(y)) || (isinf(ans) && !isinf(x))) {
math_error();
}
return mp_obj_new_float(ans);
}
#define MATH_FUN_1(py_name, c_name) \
STATIC mp_obj_t mp_math_ ## py_name(mp_obj_t x_obj) { \
return math_generic_1(x_obj, MICROPY_FLOAT_C_FUN(c_name)); \
} \
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_math_## py_name ## _obj, mp_math_ ## py_name);
#define MATH_FUN_1_TO_BOOL(py_name, c_name) \
STATIC mp_obj_t mp_math_ ## py_name(mp_obj_t x_obj) { return mp_obj_new_bool(c_name(mp_obj_get_float(x_obj))); } \
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_math_## py_name ## _obj, mp_math_ ## py_name);
#define MATH_FUN_1_TO_INT(py_name, c_name) \
STATIC mp_obj_t mp_math_ ## py_name(mp_obj_t x_obj) { return mp_obj_new_int_from_float(MICROPY_FLOAT_C_FUN(c_name)(mp_obj_get_float(x_obj))); } \
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_math_## py_name ## _obj, mp_math_ ## py_name);
#define MATH_FUN_2(py_name, c_name) \
STATIC mp_obj_t mp_math_ ## py_name(mp_obj_t x_obj, mp_obj_t y_obj) { \
return math_generic_2(x_obj, y_obj, MICROPY_FLOAT_C_FUN(c_name)); \
} \
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mp_math_## py_name ## _obj, mp_math_ ## py_name);
#define MATH_FUN_2_FLT_INT(py_name, c_name) \
STATIC mp_obj_t mp_math_ ## py_name(mp_obj_t x_obj, mp_obj_t y_obj) { \
return mp_obj_new_float(MICROPY_FLOAT_C_FUN(c_name)(mp_obj_get_float(x_obj), mp_obj_get_int(y_obj))); \
} \
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mp_math_## py_name ## _obj, mp_math_ ## py_name);
#if MP_NEED_LOG2
#undef log2
#undef log2f
// 1.442695040888963407354163704 is 1/_M_LN2
mp_float_t MICROPY_FLOAT_C_FUN(log2)(mp_float_t x) {
return MICROPY_FLOAT_C_FUN(log)(x) * MICROPY_FLOAT_CONST(1.442695040888963407354163704);
}
#endif
// sqrt(x): returns the square root of x
MATH_FUN_1(sqrt, sqrt)
// pow(x, y): returns x to the power of y
MATH_FUN_2(pow, pow)
// exp(x)
MATH_FUN_1(exp, exp)
#if MICROPY_PY_MATH_SPECIAL_FUNCTIONS
// expm1(x)
MATH_FUN_1(expm1, expm1)
// log2(x)
MATH_FUN_1(log2, log2)
// log10(x)
MATH_FUN_1(log10, log10)
// cosh(x)
MATH_FUN_1(cosh, cosh)
// sinh(x)
MATH_FUN_1(sinh, sinh)
// tanh(x)
MATH_FUN_1(tanh, tanh)
// acosh(x)
MATH_FUN_1(acosh, acosh)
// asinh(x)
MATH_FUN_1(asinh, asinh)
// atanh(x)
MATH_FUN_1(atanh, atanh)
#endif
// cos(x)
MATH_FUN_1(cos, cos)
// sin(x)
MATH_FUN_1(sin, sin)
// tan(x)
MATH_FUN_1(tan, tan)
// acos(x)
MATH_FUN_1(acos, acos)
// asin(x)
MATH_FUN_1(asin, asin)
// atan(x)
MATH_FUN_1(atan, atan)
// atan2(y, x)
MATH_FUN_2(atan2, atan2)
// ceil(x)
MATH_FUN_1_TO_INT(ceil, ceil)
// copysign(x, y)
STATIC mp_float_t MICROPY_FLOAT_C_FUN(copysign_func)(mp_float_t x, mp_float_t y) {
return MICROPY_FLOAT_C_FUN(copysign)(x, y);
}
MATH_FUN_2(copysign, copysign_func)
// fabs(x)
STATIC mp_float_t MICROPY_FLOAT_C_FUN(fabs_func)(mp_float_t x) {
return MICROPY_FLOAT_C_FUN(fabs)(x);
}
MATH_FUN_1(fabs, fabs_func)
// floor(x)
MATH_FUN_1_TO_INT(floor, floor) //TODO: delegate to x.__floor__() if x is not a float
// fmod(x, y)
MATH_FUN_2(fmod, fmod)
// isfinite(x)
MATH_FUN_1_TO_BOOL(isfinite, isfinite)
// isinf(x)
MATH_FUN_1_TO_BOOL(isinf, isinf)
// isnan(x)
MATH_FUN_1_TO_BOOL(isnan, isnan)
// trunc(x)
MATH_FUN_1_TO_INT(trunc, trunc)
// ldexp(x, exp)
MATH_FUN_2_FLT_INT(ldexp, ldexp)
#if MICROPY_PY_MATH_SPECIAL_FUNCTIONS
// erf(x): return the error function of x
MATH_FUN_1(erf, erf)
// erfc(x): return the complementary error function of x
MATH_FUN_1(erfc, erfc)
// gamma(x): return the gamma function of x
MATH_FUN_1(gamma, tgamma)
// lgamma(x): return the natural logarithm of the gamma function of x
MATH_FUN_1(lgamma, lgamma)
#endif
//TODO: factorial, fsum
// Function that takes a variable number of arguments
// log(x[, base])
STATIC mp_obj_t mp_math_log(size_t n_args, const mp_obj_t *args) {
mp_float_t x = mp_obj_get_float(args[0]);
if (x <= (mp_float_t)0.0) {
math_error();
}
mp_float_t l = MICROPY_FLOAT_C_FUN(log)(x);
if (n_args == 1) {
return mp_obj_new_float(l);
} else {
mp_float_t base = mp_obj_get_float(args[1]);
if (base <= (mp_float_t)0.0) {
math_error();
// Turn off warning when comparing exactly with integral value 1.0
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wfloat-equal"
} else if (base == (mp_float_t)1.0) {
#pragma GCC diagnostic pop
mp_raise_msg(&mp_type_ZeroDivisionError, "division by zero");
}
return mp_obj_new_float(l / MICROPY_FLOAT_C_FUN(log)(base));
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_math_log_obj, 1, 2, mp_math_log);
// Functions that return a tuple
// frexp(x): converts a floating-point number to fractional and integral components
STATIC mp_obj_t mp_math_frexp(mp_obj_t x_obj) {
int int_exponent = 0;
mp_float_t significand = MICROPY_FLOAT_C_FUN(frexp)(mp_obj_get_float(x_obj), &int_exponent);
mp_obj_t tuple[2];
tuple[0] = mp_obj_new_float(significand);
tuple[1] = mp_obj_new_int(int_exponent);
return mp_obj_new_tuple(2, tuple);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_math_frexp_obj, mp_math_frexp);
// modf(x)
STATIC mp_obj_t mp_math_modf(mp_obj_t x_obj) {
mp_float_t int_part = 0.0;
mp_float_t fractional_part = MICROPY_FLOAT_C_FUN(modf)(mp_obj_get_float(x_obj), &int_part);
mp_obj_t tuple[2];
tuple[0] = mp_obj_new_float(fractional_part);
tuple[1] = mp_obj_new_float(int_part);
return mp_obj_new_tuple(2, tuple);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_math_modf_obj, mp_math_modf);
// Angular conversions
// radians(x)
STATIC mp_obj_t mp_math_radians(mp_obj_t x_obj) {
return mp_obj_new_float(mp_obj_get_float(x_obj) * (MP_PI / MICROPY_FLOAT_CONST(180.0)));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_math_radians_obj, mp_math_radians);
// degrees(x)
STATIC mp_obj_t mp_math_degrees(mp_obj_t x_obj) {
return mp_obj_new_float(mp_obj_get_float(x_obj) * (MICROPY_FLOAT_CONST(180.0) / MP_PI));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_math_degrees_obj, mp_math_degrees);
STATIC const mp_rom_map_elem_t mp_module_math_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_math) },
{ MP_ROM_QSTR(MP_QSTR_e), mp_const_float_e },
{ MP_ROM_QSTR(MP_QSTR_pi), mp_const_float_pi },
{ MP_ROM_QSTR(MP_QSTR_sqrt), MP_ROM_PTR(&mp_math_sqrt_obj) },
{ MP_ROM_QSTR(MP_QSTR_pow), MP_ROM_PTR(&mp_math_pow_obj) },
{ MP_ROM_QSTR(MP_QSTR_exp), MP_ROM_PTR(&mp_math_exp_obj) },
#if MICROPY_PY_MATH_SPECIAL_FUNCTIONS
{ MP_ROM_QSTR(MP_QSTR_expm1), MP_ROM_PTR(&mp_math_expm1_obj) },
#endif
{ MP_ROM_QSTR(MP_QSTR_log), MP_ROM_PTR(&mp_math_log_obj) },
#if MICROPY_PY_MATH_SPECIAL_FUNCTIONS
{ MP_ROM_QSTR(MP_QSTR_log2), MP_ROM_PTR(&mp_math_log2_obj) },
{ MP_ROM_QSTR(MP_QSTR_log10), MP_ROM_PTR(&mp_math_log10_obj) },
{ MP_ROM_QSTR(MP_QSTR_cosh), MP_ROM_PTR(&mp_math_cosh_obj) },
{ MP_ROM_QSTR(MP_QSTR_sinh), MP_ROM_PTR(&mp_math_sinh_obj) },
{ MP_ROM_QSTR(MP_QSTR_tanh), MP_ROM_PTR(&mp_math_tanh_obj) },
{ MP_ROM_QSTR(MP_QSTR_acosh), MP_ROM_PTR(&mp_math_acosh_obj) },
{ MP_ROM_QSTR(MP_QSTR_asinh), MP_ROM_PTR(&mp_math_asinh_obj) },
{ MP_ROM_QSTR(MP_QSTR_atanh), MP_ROM_PTR(&mp_math_atanh_obj) },
#endif
{ MP_ROM_QSTR(MP_QSTR_cos), MP_ROM_PTR(&mp_math_cos_obj) },
{ MP_ROM_QSTR(MP_QSTR_sin), MP_ROM_PTR(&mp_math_sin_obj) },
{ MP_ROM_QSTR(MP_QSTR_tan), MP_ROM_PTR(&mp_math_tan_obj) },
{ MP_ROM_QSTR(MP_QSTR_acos), MP_ROM_PTR(&mp_math_acos_obj) },
{ MP_ROM_QSTR(MP_QSTR_asin), MP_ROM_PTR(&mp_math_asin_obj) },
{ MP_ROM_QSTR(MP_QSTR_atan), MP_ROM_PTR(&mp_math_atan_obj) },
{ MP_ROM_QSTR(MP_QSTR_atan2), MP_ROM_PTR(&mp_math_atan2_obj) },
{ MP_ROM_QSTR(MP_QSTR_ceil), MP_ROM_PTR(&mp_math_ceil_obj) },
{ MP_ROM_QSTR(MP_QSTR_copysign), MP_ROM_PTR(&mp_math_copysign_obj) },
{ MP_ROM_QSTR(MP_QSTR_fabs), MP_ROM_PTR(&mp_math_fabs_obj) },
{ MP_ROM_QSTR(MP_QSTR_floor), MP_ROM_PTR(&mp_math_floor_obj) },
{ MP_ROM_QSTR(MP_QSTR_fmod), MP_ROM_PTR(&mp_math_fmod_obj) },
{ MP_ROM_QSTR(MP_QSTR_frexp), MP_ROM_PTR(&mp_math_frexp_obj) },
{ MP_ROM_QSTR(MP_QSTR_ldexp), MP_ROM_PTR(&mp_math_ldexp_obj) },
{ MP_ROM_QSTR(MP_QSTR_modf), MP_ROM_PTR(&mp_math_modf_obj) },
{ MP_ROM_QSTR(MP_QSTR_isfinite), MP_ROM_PTR(&mp_math_isfinite_obj) },
{ MP_ROM_QSTR(MP_QSTR_isinf), MP_ROM_PTR(&mp_math_isinf_obj) },
{ MP_ROM_QSTR(MP_QSTR_isnan), MP_ROM_PTR(&mp_math_isnan_obj) },
{ MP_ROM_QSTR(MP_QSTR_trunc), MP_ROM_PTR(&mp_math_trunc_obj) },
{ MP_ROM_QSTR(MP_QSTR_radians), MP_ROM_PTR(&mp_math_radians_obj) },
{ MP_ROM_QSTR(MP_QSTR_degrees), MP_ROM_PTR(&mp_math_degrees_obj) },
#if MICROPY_PY_MATH_SPECIAL_FUNCTIONS
{ MP_ROM_QSTR(MP_QSTR_erf), MP_ROM_PTR(&mp_math_erf_obj) },
{ MP_ROM_QSTR(MP_QSTR_erfc), MP_ROM_PTR(&mp_math_erfc_obj) },
{ MP_ROM_QSTR(MP_QSTR_gamma), MP_ROM_PTR(&mp_math_gamma_obj) },
{ MP_ROM_QSTR(MP_QSTR_lgamma), MP_ROM_PTR(&mp_math_lgamma_obj) },
#endif
};
STATIC MP_DEFINE_CONST_DICT(mp_module_math_globals, mp_module_math_globals_table);
const mp_obj_module_t mp_module_math = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t*)&mp_module_math_globals,
};
#endif // MICROPY_PY_BUILTINS_FLOAT && MICROPY_PY_MATH
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