function zip_deflate($content)
{
// Compress content, and suck information from gzip header.
$z = gzip_compress($content);
// Suck OS type byte from gzip header. FIXME: this smells bad.
extract(unpack("a2magic/Ccomp_type/Cflags/@9/Cos_type", $z));
if ($magic != GZIP_MAGIC)
trigger_error(sprintf('Bad %s', 'gzip magic'), E_USER_ERROR);
if ($comp_type != GZIP_DEFLATE)
trigger_error(sprintf('Bad %s', 'gzip comp type'), E_USER_ERROR);
if (($flags & 0x3e) != 0)
trigger_error(sprintf('Bad %s', sprintf('flags (0x%02x)', $flags)), E_USER_ERROR);
$gz_header_len = 10;
$gz_data_len = strlen($z) - $gz_header_len - 8;
if ($gz_data_len < 0)
trigger_error('not enough gzip output?', E_USER_ERROR);
extract(unpack('Vcrc32', substr($z, $gz_header_len + $gz_data_len)));
return array(
substr($z, $gz_header_len, $gz_data_len), // gzipped data
$crc32, // crc
$os_type // OS type
);
}
function zip_deflate($content)
{
// Compress content, and suck information from gzip header.
if (function_exists('gzencode')) {
$z = gzencode($content);
} else {
$z = gzip_compress($content);
}
// Suck OS type byte from gzip header. FIXME: this smells bad.
extract(unpack("a2magic/Ccomp_type/Cflags/@9/Cos_type", $z));
if ($magic != GZIP_MAGIC) {
trigger_error(sprintf("Bad %s", "gzip magic"), E_USER_ERROR);
}
if ($comp_type != GZIP_DEFLATE) {
trigger_error(sprintf("Bad %s", "gzip comp type"), E_USER_ERROR);
}
if (($flags & 0x3e) != 0) {
trigger_error(sprintf("Bad %s", sprintf("flags (0x%02x)", $flags)), E_USER_ERROR);
}
$gz_header_len = 10;
$gz_data_len = strlen($z) - $gz_header_len - 8;
if ($gz_data_len < 0) {
trigger_error("not enough gzip output?", E_USER_ERROR);
}
extract(unpack("Vcrc32", substr($z, $gz_header_len + $gz_data_len)));
return array(substr($z, $gz_header_len, $gz_data_len), $crc32, $os_type);
}
function zip_deflate($content)
{
// Compress content, and suck information from gzip header.
$z = gzip_compress($content);
// Suck OS type byte from gzip header. FIXME: this smells bad.
extract(unpack("a2magic/Ccomp_type/Cflags/@9/Cos_type", $z));
if ($magic != GZIP_MAGIC) {
die("Bad gzip magic");
}
if ($comp_type != GZIP_DEFLATE) {
die("Bad gzip comp type");
}
if (($flags & 0x3e) != 0) {
die(sprintf("Bad flags (0x%02x)", $flags));
}
$gz_header_len = 10;
$gz_data_len = strlen($z) - $gz_header_len - 8;
if ($gz_data_len < 0) {
die("not enough gzip output?");
}
extract(unpack("Vcrc32", substr($z, $gz_header_len + $gz_data_len)));
return array(substr($z, $gz_header_len, $gz_data_len), $crc32, $os_type);
}
