2 * $Id: dsi_read.c,v 1.7 2009-10-25 06:13:11 didg Exp $
4 * Copyright (c) 1997 Adrian Sun (asun@zoology.washington.edu)
5 * All rights reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
16 #endif /* HAVE_UNISTD_H */
18 #include <sys/types.h>
20 #ifdef HAVE_SYS_FILIO_H
21 #include <sys/filio.h>
24 #include <atalk/dsi.h>
25 #include <atalk/util.h>
27 /* streaming i/o for afp_read. this is all from the perspective of the
28 * client. it basically does the reverse of dsi_write. on first entry,
29 * it will send off the header plus whatever is in its command
30 * buffer. it returns the amount of stuff still to be read
31 * (constrained by the buffer size). */
32 ssize_t dsi_readinit(DSI *dsi, void *buf, const size_t buflen,
33 const size_t size, const int err)
36 dsi->flags |= DSI_NOREPLY; /* we will handle our own replies */
37 dsi->header.dsi_flags = DSIFL_REPLY;
38 /*dsi->header.dsi_command = DSIFUNC_CMD;*/
39 dsi->header.dsi_len = htonl(size);
40 dsi->header.dsi_code = htonl(err);
43 if (dsi_stream_send(dsi, buf, buflen)) {
44 dsi->datasize = size - buflen;
45 return MIN(dsi->datasize, buflen);
48 return -1; /* error */
51 void dsi_readdone(DSI *dsi)
56 /* send off the data */
57 ssize_t dsi_read(DSI *dsi, void *buf, const size_t buflen)
61 len = dsi_stream_write(dsi, buf, buflen, 0);
65 return MIN(dsi->datasize, buflen);