void zip::decompress(buffer& compressed, buffer& uncompressed)
{
fstream out(COMPRESSED, ios::out|ios::trunc);
if ( !out )
throw(streamException(out.rdstate()));
if ( out.write(compressed.get_base(), compressed.content_sz()) == 0 )
throw(streamException(out.rdstate()));
out.close();
system(form("gzip -cd %s > %s", COMPRESSED, UNCOMPRESSED));
fstream in(UNCOMPRESSED, ios::in);
if ( !in )
throw(streamException(in.rdstate()));
int x = bytes(in);
uncompressed.expand_chunk(x);
if ( in.read(uncompressed.get_base(), x) == 0 || x != in.gcount() )
throw(streamException(in.rdstate()));
uncompressed.set_content_sz(x);
in.close();
return;
}
void zip::compress(const buffer& uncompressed, buffer& compressed)
{
////////////////////////////////////////
// code for testing. I know it is slow.
////////////////////////////////////////
fstream out(UNCOMPRESSED, ios::out|ios::trunc);
if ( !out )
throw(streamException(out.rdstate()));
if ( out.write(uncompressed.get_base(), uncompressed.content_sz()) == 0 )
throw(streamException(out.rdstate()));
out.close();
system(form("gzip -c %s > %s", UNCOMPRESSED, COMPRESSED));
fstream in(COMPRESSED, ios::in);
if ( !in )
throw(streamException(in.rdstate()));
int x = bytes(in);
compressed.expand_chunk(x);
if ( in.read(compressed.get_base(), x) == 0 || x != in.gcount() )
throw(streamException(in.rdstate()));
compressed.set_content_sz(x);
in.close();
return;
}