54 lines
1.1 KiB
PHP
54 lines
1.1 KiB
PHP
<?php
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include_once("oracles/base.php");
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class numerics extends oracle {
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public $info = [
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"name" => "numeric base conversion"
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];
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public function check_query($q) {
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if (str_contains($q, " ")) {
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return false;
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}
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$q = strtolower($q);
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$profiles = [
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["0x", str_split("0123456789abcdef")],
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["", str_split("1234567890")],
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["b", str_split("10")]
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];
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foreach ($profiles as $profile) {
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$good = true;
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$good &= str_starts_with($q, $profile[0]);
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$nq = substr($q, strlen($profile[0]));
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foreach (str_split($nq) as $c) {
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$good &= in_array($c, $profile[1]);
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}
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if ($good) {
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return true;
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}
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}
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return false;
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}
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public function generate_response($q) {
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$n = 0;
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if (str_starts_with($q, "0x")) {
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$nq = substr($q, strlen("0x"));
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$n = hexdec($nq);
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}
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elseif (str_starts_with($q, "b")) {
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$nq = substr($q, strlen("b"));
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$n = bindec($nq);
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}
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else {
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$n = (int)$q;
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}
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return [
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"decimal (base 10)" => (string)$n,
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"hexadecimal (base 16)" => "0x".(string)dechex($n),
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"binary (base 2)" => "b".(string)decbin($n),
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"" => "binary inputs should be prefixed with 'b', hex with '0x'."
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];
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}
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}
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?>
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