Online PHP editor | rfc for N2mFR

@ 2014-04-14T13:51:10Z

<?php

function string_shift_left($input, $inputlen, $bits, &$output = null)
{
	$skip = (int) ($bits / 8);
	$copylen = (int) ($inputlen - $skip);
	$offset = $bits % 8;
	$mask = (0xff >> $offset) << (8 - $offset);

    $output = str_pad('', $inputlen + 1, "\x00");

    var_dump($skip, $copylen, $offset, $mask, $output);

	if ($offset == 0) {
		/* Shifting multiples of 8 allows us to simply copy the relevant bytes */
        for ($i = 0; $i < $copylen; $i++) {
            $output[$i] = $input[$i + $skip];
        }
		return;
	}

	for ($i = 0; $i < $copylen; $i++) {
        $left = (ord($input[$i + $skip]) << $offset);
        $right = (ord($input[$i + $skip + 1]) & $mask) >> $offset;
        printf("%08b|%08b\n", $left, $right);
		$output[$i] = chr($left | $right); 
	}
}
//0b000100010001000100000000;

string_shift_left("\x11\x11\x00", 2, 4, $output);

for ($i = 0; $i < strlen($output); $i++) {
    printf('%08b|', ord($output[$i]));
}

Output for git.master, git.master_jit, rfc.property-hooks: int(0) int(2) int(4) int(240) string(3) "" 100010000|00000001 100010000|00000000 00010001|00010000|00000000|

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2020-03-21 RFC: Is_Literal - declined
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