static tb_long_t tb_zip_gzip_spak_inflate(tb_zip_ref_t zip, tb_static_stream_ref_t ist, tb_static_stream_ref_t ost, tb_long_t sync)
{
// check
tb_zip_gzip_t* gzip = tb_zip_gzip_cast(zip);
tb_assert_and_check_return_val(gzip && ist && ost, -1);
// the input stream
tb_byte_t* ip = ist->p;
tb_byte_t* ie = ist->e;
tb_check_return_val(ip && ip < ie, 0);
// the output stream
tb_byte_t* op = ost->p;
tb_byte_t* oe = ost->e;
tb_assert_and_check_return_val(op && oe, -1);
// attach zstream
gzip->zstream.next_in = (Bytef*)ip;
gzip->zstream.avail_in = (uInt)(ie - ip);
gzip->zstream.next_out = (Bytef*)op;
gzip->zstream.avail_out = (uInt)(oe - op);
// inflate
tb_int_t r = inflate(&gzip->zstream, !sync? Z_NO_FLUSH : Z_SYNC_FLUSH);
tb_assertf_and_check_return_val(r == Z_OK || r == Z_STREAM_END, -1, "sync: %ld, error: %d", sync, r);
tb_trace_d("inflate: %u => %u, sync: %ld", ie - ip, (tb_byte_t*)gzip->zstream.next_out - op, sync);
// update
ist->p = (tb_byte_t*)gzip->zstream.next_in;
ost->p = (tb_byte_t*)gzip->zstream.next_out;
// end?
tb_check_return_val(r != Z_STREAM_END || ost->p > op, -1);
// ok?
return (ost->p - op);
}
static tb_long_t tb_zip_gzip_spak_deflate(tb_zip_ref_t zip, tb_static_stream_ref_t ist, tb_static_stream_ref_t ost, tb_long_t sync)
{
tb_zip_gzip_t* gzip = tb_zip_gzip_cast(zip);
tb_assert_and_check_return_val(gzip && ist && ost, -1);
// the input stream, @note maybe null for flush the end data
tb_byte_t* ip = ist->p;
tb_byte_t* ie = ist->e;
// the output stream
tb_byte_t* op = ost->p;
tb_byte_t* oe = ost->e;
tb_assert_and_check_return_val(op && oe, -1);
// attach zst
gzip->zst.next_in = (Bytef*)ip;
gzip->zst.avail_in = (uInt)(ie - ip);
gzip->zst.next_out = (Bytef*)op;
gzip->zst.avail_out = (uInt)(oe - op);
// deflate
tb_int_t r = deflate(&gzip->zst, sync > 0? Z_SYNC_FLUSH : (sync < 0? Z_FINISH : Z_NO_FLUSH));
tb_assertf_and_check_return_val(r == Z_OK || r == Z_STREAM_END, -1, "sync: %ld, error: %d", sync, r);
tb_trace_d("deflate: %u => %u, sync: %ld", (tb_size_t)(ie - ip), (tb_size_t)((tb_byte_t*)gzip->zst.next_out - op), sync);
// update
ist->p = (tb_byte_t*)gzip->zst.next_in;
ost->p = (tb_byte_t*)gzip->zst.next_out;
// end?
tb_check_return_val(r != Z_STREAM_END || ost->p > op, -1);
// ok?
return (ost->p - op);
}
