36 lines
962 B
C
36 lines
962 B
C
/**
|
|
* This file is part of the Fun programming language.
|
|
* https://fun-lang.xyz/
|
|
*
|
|
* Copyright 2026 Johannes Findeisen <you@hanez.org>
|
|
* Licensed under the terms of the Apache-2.0 license.
|
|
* https://opensource.org/license/apache-2-0
|
|
*
|
|
* Added: 2026-01-03
|
|
*/
|
|
|
|
/**
|
|
* @file log.c
|
|
* @brief Implements the OP_LOG opcode using C99 math.h log() (natural logarithm).
|
|
*/
|
|
|
|
#include <math.h>
|
|
|
|
case OP_LOG: {
|
|
Value v = pop_value(vm);
|
|
if (v.type == VAL_INT || v.type == VAL_FLOAT) {
|
|
double x = (v.type == VAL_FLOAT) ? v.d : (double)v.i;
|
|
if (x <= 0.0) {
|
|
/* Domain error: return NaN to signal invalid input */
|
|
push_value(vm, make_float(NAN));
|
|
} else {
|
|
double r = log(x);
|
|
push_value(vm, make_float(r));
|
|
}
|
|
free_value(v);
|
|
} else {
|
|
fprintf(stderr, "Runtime type error: LOG expects number, got %s\n", value_type_name(v.type));
|
|
exit(1);
|
|
}
|
|
break;
|
|
}
|