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<?php function pack_encode($format, $val) { $b64 = base64_encode(pack($format, $val)); return str_replace(array('/', '='), array('_', ''), $b64); } function pack_decode($format, $val) { $b64 = str_replace('_', '/', $val); // un-padded return unpack($format, base64_decode($b64, false)); } function pack_encode_uint16($val) { return pack_encode('S', $val); } function pack_encode_uint32($val) { return pack_encode('N', $val); } function pack_decode_uint16($val) { return pack_decode('S', $val); } function pack_decode_uint32($val) { return pack_decode('N', $val); } $max = 32767; $n = 20; $step = intval($max/$n); for ($i=0; $i<=$n; $i++) { $val = $i*$step; $enc16 = pack_encode_uint16($val); $enc32 = pack_encode_uint32($val); $str = base64_encode(strval($val)); // STUPID echo "$enc16 $enc32 $str $val"; $dec16 = pack_decode_uint16($enc16); $dec32 = pack_decode_uint32($enc32); if ($dec16 !== $val) { echo " $dec16 != $val"; } else if ($dec32 !== $val) { echo " $dec32 != $val"; } echo "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
AAA AAAAAA MA== 0 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 0 ZgY AAAGZg MTYzOA== 1638 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 1638 zAw AAAMzA MzI3Ng== 3276 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 3276 MhM AAATMg NDkxNA== 4914 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 4914 mBk AAAZmA NjU1Mg== 6552 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 6552 _h8 AAAf_g ODE5MA== 8190 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 8190 ZCY AAAmZA OTgyOA== 9828 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 9828 yiw AAAsyg MTE0NjY= 11466 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 11466 MDM AAAzMA MTMxMDQ= 13104 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 13104 ljk AAA5lg MTQ3NDI= 14742 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 14742 _D8 AAA__A MTYzODA= 16380 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 16380 YkY AABGYg MTgwMTg= 18018 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 18018 yEw AABMyA MTk2NTY= 19656 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 19656 LlM AABTLg MjEyOTQ= 21294 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 21294 lFk AABZlA MjI5MzI= 22932 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 22932 +l8 AABf+g MjQ1NzA= 24570 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 24570 YGY AABmYA MjYyMDg= 26208 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 26208 xmw AABsxg Mjc4NDY= 27846 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 27846 LHM AABzLA Mjk0ODQ= 29484 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 29484 knk AAB5kg MzExMjI= 31122 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 31122 +H8 AAB_+A MzI3NjA= 32760 Warning: Array to string conversion in /in/Pr7JU on line 43 Array != 32760

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