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/*
* Copyright (C) 2020-2021 Jo-Philipp Wich <jo@mein.io>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <math.h>
#include <sys/time.h>
#include "../module.h"
static bool srand_called = false;
static uc_value_t *
uc_abs(uc_vm *vm, size_t nargs)
{
uc_value_t *v = uc_get_arg(0);
uc_type_t t;
int64_t n;
double d;
if (ucv_type(v) == UC_NULL)
return ucv_double_new(NAN);
t = uc_to_number(v, &n, &d);
if (t == UC_DOUBLE)
return (isnan(d) || d < 0) ? ucv_double_new(-d) : ucv_get(v);
return (n < 0) ? ucv_int64_new(-n) : ucv_get(v);
}
static uc_value_t *
uc_atan2(uc_vm *vm, size_t nargs)
{
double d1 = uc_to_double(uc_get_arg(0));
double d2 = uc_to_double(uc_get_arg(1));
if (isnan(d1) || isnan(d2))
return ucv_double_new(NAN);
return ucv_double_new(atan2(d1, d2));
}
static uc_value_t *
uc_cos(uc_vm *vm, size_t nargs)
{
double d = uc_to_double(uc_get_arg(0));
if (isnan(d))
return ucv_double_new(NAN);
return ucv_double_new(cos(d));
}
static uc_value_t *
uc_exp(uc_vm *vm, size_t nargs)
{
double d = uc_to_double(uc_get_arg(0));
if (isnan(d))
return ucv_double_new(NAN);
return ucv_double_new(exp(d));
}
static uc_value_t *
uc_log(uc_vm *vm, size_t nargs)
{
double d = uc_to_double(uc_get_arg(0));
if (isnan(d))
return ucv_double_new(NAN);
return ucv_double_new(log(d));
}
static uc_value_t *
uc_sin(uc_vm *vm, size_t nargs)
{
double d = uc_to_double(uc_get_arg(0));
if (isnan(d))
return ucv_double_new(NAN);
return ucv_double_new(sin(d));
}
static uc_value_t *
uc_sqrt(uc_vm *vm, size_t nargs)
{
double d = uc_to_double(uc_get_arg(0));
if (isnan(d))
return ucv_double_new(NAN);
return ucv_double_new(sqrt(d));
}
static uc_value_t *
uc_pow(uc_vm *vm, size_t nargs)
{
double x = uc_to_double(uc_get_arg(0));
double y = uc_to_double(uc_get_arg(1));
if (isnan(x) || isnan(y))
return ucv_double_new(NAN);
return ucv_double_new(pow(x, y));
}
static uc_value_t *
uc_rand(uc_vm *vm, size_t nargs)
{
struct timeval tv;
if (!srand_called) {
gettimeofday(&tv, NULL);
srand((tv.tv_sec * 1000) + (tv.tv_usec / 1000));
srand_called = true;
}
return ucv_int64_new(rand());
}
static uc_value_t *
uc_srand(uc_vm *vm, size_t nargs)
{
int64_t n = uc_to_int64(uc_get_arg(0));
srand((unsigned int)n);
srand_called = true;
return NULL;
}
static const uc_cfunction_list math_fns[] = {
{ "abs", uc_abs },
{ "atan2", uc_atan2 },
{ "cos", uc_cos },
{ "exp", uc_exp },
{ "log", uc_log },
{ "sin", uc_sin },
{ "sqrt", uc_sqrt },
{ "pow", uc_pow },
{ "rand", uc_rand },
{ "srand", uc_srand },
};
void uc_module_init(uc_value_t *scope)
{
uc_add_proto_functions(scope, math_fns);
}
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