<?php
function add($overflowsTimes, $augend, $addend){
$sum = $augend + $addend;
if(is_float($sum)){
$sum = $addend - (PHP_INT_MAX - $augend);
$overflowsTimes++;
}elseif($sum < 0){
$sum = PHP_INT_MAX + $sum;
$overflowsTimes--;
}
if($overflowsTimes < 0){
throw new Error();
}
return [
$overflowsTimes,
$sum
];
}
assert(add(0, 0, 0) === [0, 0]);
assert(add(0, 100, 200) === [0, 300]);
assert(add(0, PHP_INT_MAX - 100, 100) === [0, PHP_INT_MAX]);
assert(add(0, PHP_INT_MAX, 100) === [1, 100]);
assert(add(0, PHP_INT_MAX, 1000) === [1, 1000]);
assert(add(0, PHP_INT_MAX, PHP_INT_MAX) === [1, PHP_INT_MAX]);
assert(add(1, 0, 0) === [1, 0]);
assert(add(1, 100, 200) === [1, 300]);
assert(add(1, PHP_INT_MAX - 100, 100) === [1, PHP_INT_MAX]);
assert(add(1, PHP_INT_MAX, 100) === [2, 100]);
assert(add(1, PHP_INT_MAX, 1000) === [2, 1000]);
assert(add(1, PHP_INT_MAX, PHP_INT_MAX) === [2, PHP_INT_MAX]);
assert(add(2, 0, 0) === [2, 0]);
assert(add(2, 100, 200) === [2, 300]);
assert(add(2, PHP_INT_MAX - 100, 100) === [2, PHP_INT_MAX]);
assert(add(2, PHP_INT_MAX, 100) === [3, 100]);
assert(add(2, PHP_INT_MAX, 1000) === [3, 1000]);
assert(add(2, PHP_INT_MAX, PHP_INT_MAX) === [3, PHP_INT_MAX]);
try{
add(0, PHP_INT_MAX, PHP_INT_MIN);
}catch(Throwable $e){}
print_r(add(1, PHP_INT_MAX, PHP_INT_MIN));
preferences:
27.53 ms | 402 KiB | 5 Q