///
/// - Uses z_stream to decompress the data stream on the fly.
/// - Uses a buffer to reduce the number of times the wrapped stream must be read.
-class DeflatedInputStream : public InputStream {
- InputStream &m_istream;
- z_stream m_zipstream;
- enum unnamed0 { m_bufsize = 1024 };
- unsigned char m_buffer[m_bufsize];
+class DeflatedInputStream : public InputStream
+{
+InputStream& m_istream;
+z_stream m_zipstream;
+enum unnamed0 { m_bufsize = 1024 };
+unsigned char m_buffer[m_bufsize];
public:
- DeflatedInputStream(InputStream &istream)
- : m_istream(istream)
- {
- m_zipstream.zalloc = 0;
- m_zipstream.zfree = 0;
- m_zipstream.opaque = 0;
- m_zipstream.avail_in = 0;
- inflateInit2(&m_zipstream, -MAX_WBITS);
- }
-
- ~DeflatedInputStream()
- {
- inflateEnd(&m_zipstream);
- }
-
- size_type read(byte_type *buffer, size_type length)
- {
- m_zipstream.next_out = buffer;
- m_zipstream.avail_out = static_cast<uInt>( length );
- while (m_zipstream.avail_out != 0) {
- if (m_zipstream.avail_in == 0) {
- m_zipstream.next_in = m_buffer;
- m_zipstream.avail_in = static_cast<uInt>( m_istream.read(m_buffer, m_bufsize));
- }
- if (inflate(&m_zipstream, Z_SYNC_FLUSH) != Z_OK) {
- break;
- }
- }
- return length - m_zipstream.avail_out;
- }
+DeflatedInputStream( InputStream& istream )
+ : m_istream( istream ){
+ m_zipstream.zalloc = 0;
+ m_zipstream.zfree = 0;
+ m_zipstream.opaque = 0;
+ m_zipstream.avail_in = 0;
+ inflateInit2( &m_zipstream, -MAX_WBITS );
+}
+~DeflatedInputStream(){
+ inflateEnd( &m_zipstream );
+}
+size_type read( byte_type* buffer, size_type length ){
+ m_zipstream.next_out = buffer;
+ m_zipstream.avail_out = static_cast<uInt>( length );
+ while ( m_zipstream.avail_out != 0 )
+ {
+ if ( m_zipstream.avail_in == 0 ) {
+ m_zipstream.next_in = m_buffer;
+ m_zipstream.avail_in = static_cast<uInt>( m_istream.read( m_buffer, m_bufsize ) );
+ }
+ if ( inflate( &m_zipstream, Z_SYNC_FLUSH ) != Z_OK ) {
+ break;
+ }
+ }
+ return length - m_zipstream.avail_out;
+}
};
#endif