Function httpRead2

cups/http.c:1956–2154

 */

ssize_t					/* O - Number of bytes read */
httpRead2(http_t *http,			/* I - HTTP connection */
          char   *buffer,		/* I - Buffer for data */
	  size_t length)		/* I - Maximum number of bytes */
{
  ssize_t	bytes;			/* Bytes read */


#ifdef HAVE_LIBZ
  DEBUG_printf(("httpRead2(http=%p, buffer=%p, length=" CUPS_LLFMT ") coding=%d data_encoding=%d data_remaining=" CUPS_LLFMT, (void *)http, (void *)buffer, CUPS_LLCAST length, http ? http->coding : 0, http ? http->data_encoding : 0, CUPS_LLCAST (http ? http->data_remaining : -1)));
#else
  DEBUG_printf(("httpRead2(http=%p, buffer=%p, length=" CUPS_LLFMT ") data_encoding=%d data_remaining=" CUPS_LLFMT, (void *)http, (void *)buffer, CUPS_LLCAST length, http ? http->data_encoding : 0, CUPS_LLCAST (http ? http->data_remaining : -1)));
#endif /* HAVE_LIBZ */

  if (http == NULL || buffer == NULL)
    return (-1);

  http->activity = time(NULL);
  http->error    = 0;

  if (length <= 0)
    return (0);

#ifdef HAVE_LIBZ
  if (http->coding >= _HTTP_CODING_GUNZIP)
  {
    do
    {
      if (((z_stream *)http->stream)->avail_in > 0)
      {
	int	zerr;			/* Decompressor error */

	DEBUG_printf(("2httpRead2: avail_in=%d, avail_out=%d",
	              (int)((z_stream *)http->stream)->avail_in, (int)length));

	((z_stream *)http->stream)->next_out  = (Bytef *)buffer;
	((z_stream *)http->stream)->avail_out = (uInt)length;

	if ((zerr = inflate((z_stream *)http->stream, Z_SYNC_FLUSH)) < Z_OK)
	{
	  DEBUG_printf(("2httpRead2: zerr=%d", zerr));
#ifdef DEBUG
          http_debug_hex("2httpRead2", (char *)http->sbuffer, (int)((z_stream *)http->stream)->avail_in);
#endif /* DEBUG */

	  http->error = EIO;
	  return (-1);
	}

	bytes = (ssize_t)(length - ((z_stream *)http->stream)->avail_out);

	DEBUG_printf(("2httpRead2: avail_in=%d, avail_out=%d, bytes=%d",
		      ((z_stream *)http->stream)->avail_in, ((z_stream *)http->stream)->avail_out,
		      (int)bytes));
      }
      else
        bytes = 0;