Function http_read_buffered

cups/http.c:4262–4292

 */

static ssize_t				/* O - Number of bytes read or -1 on error */
http_read_buffered(http_t *http,	/* I - HTTP connection */
                   char   *buffer,	/* I - Buffer */
                   size_t length)	/* I - Maximum bytes to read */
{
  ssize_t	bytes;			/* Bytes read */


  DEBUG_printf(("7http_read_buffered(http=%p, buffer=%p, length=" CUPS_LLFMT ") used=%d", (void *)http, (void *)buffer, CUPS_LLCAST length, http->used));

  if (http->used > 0)
  {
    if (length > (size_t)http->used)
      bytes = (ssize_t)http->used;
    else
      bytes = (ssize_t)length;

    DEBUG_printf(("8http_read_buffered: Grabbing %d bytes from input buffer.",
                  (int)bytes));

    memcpy(buffer, http->buffer, (size_t)bytes);
    http->used -= (int)bytes;

    if (http->used > 0)
      memmove(http->buffer, http->buffer + bytes, (size_t)http->used);
  }
  else
    bytes = http_read(http, buffer, length, http->wait_value);

  return (bytes);
}


/*