Buffer DeflateFilter::process(const BufferRef& input)
{
//FIXME
bool eof = input.empty();
/* if (input.empty())
{
TRACE("process received empty input");
return Buffer();
}
*/
z_.total_out = 0;
z_.next_in = reinterpret_cast<Bytef *>(input.begin());
z_.avail_in = input.size();
Buffer output(input.size() * 1.1 + 12 + 18);
z_.next_out = reinterpret_cast<Bytef *>(output.end());
z_.avail_out = output.capacity();
do
{
if (output.size() > output.capacity() / 2)
{
z_.avail_out = Buffer::CHUNK_SIZE;
output.reserve(output.capacity() + z_.avail_out);
}
int flushMethod;
int expected;
if (!eof)
{
flushMethod = Z_SYNC_FLUSH; // Z_NO_FLUSH
expected = Z_OK;
}
else
{
flushMethod = Z_FINISH;
expected = Z_STREAM_END;
}
int rv = deflate(&z_, flushMethod);
//TRACE("deflate(): rv=%d, avail_in=%d, avail_out=%d, total_out=%ld", rv, z_.avail_in, z_.avail_out, z_.total_out);
if (rv != expected)
{
TRACE("process: deflate() error (%d)", rv);
return Buffer();
}
}
while (z_.avail_out == 0);
assert(z_.avail_in == 0);
output.resize(z_.total_out);
//TRACE("process(%ld bytes, eof=%d) -> %ld", input.size(), eof, z_.total_out);
return output;
}
Buffer BZip2Filter::process(const BufferRef& input)
{
if (input.empty())
return Buffer();
int rv = BZ2_bzCompressInit(&bz_,
level(), // compression level
0, // no output
0 // work factor
);
if (rv != BZ_OK)
return Buffer();
bz_.next_in = input.begin();
bz_.avail_in = input.size();
bz_.total_in_lo32 = 0;
bz_.total_in_hi32 = 0;
Buffer output(input.size() * 1.1 + 12);
bz_.next_out = output.end();
bz_.avail_out = output.capacity();
bz_.total_out_lo32 = 0;
bz_.total_out_hi32 = 0;
rv = BZ2_bzCompress(&bz_, BZ_FINISH);
if (rv != BZ_STREAM_END)
{
BZ2_bzCompressEnd(&bz_);
return Buffer();
}
if (bz_.total_out_hi32)
return Buffer(); // file too large
output.resize(bz_.total_out_lo32);
rv = BZ2_bzCompressEnd(&bz_);
if (rv != BZ_OK)
return Buffer();
return output;
}
inline bool url_decode(Buffer& value, BufferRef& url)
{
assert(url.belongsTo(value));
std::size_t left = url.begin() - value.begin();
std::size_t right = left + url.size();
std::size_t i = left; // read pos
std::size_t d = left; // write pos
while (i != right) {
if (value[i] == '%') {
if (i + 3 <= right) {
int ival;
if (hex2int(value.begin() + i + 1, value.begin() + i + 3, ival)) {
value[d++] = static_cast<char>(ival);
i += 3;
} else {
return false;
}
} else {
return false;
}
} else if (value[i] == '+') {
value[d++] = ' ';
++i;
} else if (d != i) {
value[d++] = value[i++];
} else {
++d;
++i;
}
}
url = value.ref(left, d - left);
return true;
}