hhb_datatypes.inc.php

<?php
declare(strict_types = 1);
function to_uint8_t(int $i): string {
	return pack ( 'C', $i );
}
function from_uint8_t(string $i): int {
	// ord($i) , i know.
	$arr = unpack ( "Cuint8_t", $i );
	return $arr ['uint8_t'];
}
function from_little_uint16_t(string $i): int {
	$arr = unpack ( 'vuint16_t', $i );
	return $arr ['uint16_t'];
}
function from_big_uint16_t(string $i): int {
	$arr = unpack ( 'nuint16_t', $i );
	return $arr ['uint16_t'];
}
function to_little_uint16_t(int $i): string {
	return pack ( 'v', $i );
}
function to_big_uint16_t(int $i): string {
	return pack ( 'n', $i );
}
function from_little_uint32_t(string $i): int {
	$arr = unpack ( 'Vuint32_t', $i );
	return $arr ['uint32_t'];
}
function from_big_uint32_t(string $i): int {
	$arr = unpack ( 'Nuint32_t', $i );
	return $arr ['uint32_t'];
}
function to_little_uint32_t(int $i): string {
	return pack ( 'V', $i );
}
function to_big_uint32_t(int $i): string {
	return pack ( 'N', $i );
}
/**
 * convert a (binary) string containing a little-endian uint64_t
 * to a native php int
 *
 * @param string $i
 * @return int
 */
function from_little_uint64_t(string $i): int
{
    $arr = unpack('Puint64_t', $i);
    return $arr['uint64_t'];
}

function from_big_uint64_t(string $i): int {
	$arr = unpack ( 'Juint64_t', $i );
	return $arr ['uint64_t'];
}
/**
 * convert a native php int to a little-endian uint64_t (binary) string
 *
 * @param int $i
 * @return string
 */
function to_little_uint64_t(int $i): string
{
    return pack('P', $i);
}
function to_big_uint64_t(int $i): string {
	return pack ( 'J', $i );
}
/* splits up Nagle Algorithm combined data */
function hhb_denagle(string $nagled_binary): array {
	$ret = array ();
	$pos = 0;
	$len = strlen ( $nagled_binary );
	while ( $len > 0 ) {
		if ($len < 2) {
			throw new Exception ( 'Invalid Nagle algorithm: at byte ' . $pos . ', length header is <2 bytes long!' );
		}
		$sublen = from_little_uint16_t ( $nagled_binary [0] . $nagled_binary [1] );
		$nagled_binary = substr ( $nagled_binary, 2 );
		$len -= 2;
		if ($len < $sublen) {
			throw new Exception ( 'Invalid Nagle algorithm: length header at byte ' . $pos . ' specify a length of ' . $sublen . ' bytes, but only ' . $len . ' bytes remain!' );
		}
		$ret [] = substr ( $nagled_binary, 0, $sublen );
		$nagled_binary = substr ( $nagled_binary, $sublen );
		$len -= $sublen;
		$pos += $sublen + 2;
	}
	return $ret;
}