fix the size of files which more than 4GB----解决文件大于2G时的显示问题

[ivanhao]

when I use the Kod in my Raspberry Pi II(OS is base in debian),I found that when the size of files whick more than 2GB,the files size are incorrect.then I fixed this problem with follow mathod:
/lib/function/file.function.php
turn :

function get_filesize($path){
    @$ret = abs(sprintf("%u",filesize($path))); 
    return (int)$ret;
}

to this:

function get_filesize($path){
    @$ret = abs(sprintf("%u",filesize($path))); 
    return $ret;
}

but, when files size over 4G,It's still incorrect.

then add a function "fsize()" before "get_filesize()":

function fsize($file) {
  // filesize will only return the lower 32 bits of
  // the file's size! Make it unsigned.
  $fmod = filesize($file);
  if ($fmod < 0) $fmod += 2.0 * (PHP_INT_MAX + 1);

  // find the upper 32 bits
  $i = 0;

  $myfile = fopen($file, "r");

  // feof has undefined behaviour for big files.
  // after we hit the eof with fseek,
  // fread may not be able to detect the eof,
  // but it also can't read bytes, so use it as an
  // indicator.
  while (strlen(fread($myfile, 1)) === 1) {
    fseek($myfile, PHP_INT_MAX, SEEK_CUR);
    $i++;
  }

  fclose($myfile);

  // $i is a multiplier for PHP_INT_MAX byte blocks.
  // return to the last multiple of 4, as filesize has modulo of 4 GB (lower 32 bits)
  if ($i % 2 == 1) $i--;

  // add the lower 32 bit to our PHP_INT_MAX multiplier
  return ((float)($i) * (PHP_INT_MAX + 1)) + $fmod;
}

and turn get_filesize() to this:

function get_filesize($path){
    @$ret = fsize($path);
    return $ret;
}

[ragnaroks]

May work:
function get_filesize($path){
@$ret = abs(sprintf("%u",filesize($path)));
return (float)$ret;
}

[kalcaddle]

good job!