int hpgs_copy_streams (hpgs_ostream *out, hpgs_istream *in)
{
unsigned char buf[16384];
size_t sz;
while ((sz = hpgs_istream_read(buf,1,sizeof(buf),in)) > 0)
if (hpgs_ostream_write(buf,1,sz,out) == 0)
return -1;
return hpgs_istream_iserror(in);
}
static int z_consume(hpgs_z_ostream_stream *stream, int flags)
{
int cnt=stream->pptr-stream->buffer;
int zret;
if (stream->errflg)
return EOF;
if (!stream->zstream.next_out && z_init(stream)) return EOF;
if (cnt <= 0 && flags == Z_NO_FLUSH) return 0;
stream->zstream.avail_in=cnt;
stream->zstream.total_in=0;
stream->zstream.next_in=(Bytef *)stream->buffer;
do
{
stream->zstream.avail_out=Z_OSTREAM_XFER_SIZE;
stream->zstream.total_out=0;
stream->zstream.next_out=(Bytef *)stream->xfer;
zret=deflate (&stream->zstream,flags);
if (hpgs_ostream_write(stream->xfer,1,stream->zstream.total_out,stream->base) < stream->zstream.total_out)
{ stream->errflg = 1; return -1; }
}
while (zret == Z_OK &&
stream->zstream.avail_out == 0);
stream->pptr = stream->buffer;
if (stream->zstream.avail_in==0)
{
stream->total_bytes += cnt;
return 0;
}
else
{
stream->errflg = 1;
return -1;
}
}
