請求の確認

util.php

@@ -434,6 +434,44 @@ function getImageInfo(string $url): \Std\Lib\Image {
   return $img;
 }
 
+function align(int $val): int {
+  if ($val <= 0) return 1;
+  if ($val === 1) return 1;
+
+  $res = 0;
+  $lower = 1;
+
+  while ($lower * 2 <= $val) $lower *= 2;
+  $upper = $lower * 2;
+
+  if (($val - $lower) <= ($upper - $val)) return $lower;
+  return $upper;
+}
+
+function align_up(int $val): int {
+  if ($val <= 0) return 1;
+  if ($val === 1) return 1;
+
+  $res = 0;
+  $lower = 1;
+
+  while ($lower * 2 <= $val) $lower *= 2;
+  $upper = $lower * 2;
+
+  return $upper;
+}
+
+function align_down(int $val): int {
+  if ($val <= 0) return 1;
+  if ($val === 1) return 1;
+
+  $res = 0;
+  $lower = 1;
+
+  while ($lower * 2 <= $val) $lower *= 2;
+  return $lower;
+}
+
 // PHP 8.3と8.4の場合
 if (!function_exists('array_last')) {
   function array_last(array $array): mixed {