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/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
*/
/*
* Implements communication through a socket or any file handle.
*/
#include "vim.h"
#if defined(FEAT_CHANNEL) || defined(PROTO)
typedef struct {
sock_T ch_fd;
int ch_idx;
} channel_T;
static channel_T *channels = NULL;
static int channel_count = 0;
/*
* Add a new channel slot, return the index.
* Returns -1 if out of space.
*/
static int
add_channel(void)
{
int idx;
channel_T *new_channels;
if (channels != NULL)
for (idx = 0; idx < channel_count; ++idx)
if (channels[idx].ch_fd < 0)
/* re-use a closed channel slot */
return idx;
if (channel_count == MAX_OPEN_CHANNELS)
return -1;
new_channels = (channel_T *)alloc(sizeof(channel_T) * channel_count + 1);
if (new_channels == NULL)
return -1;
if (channels != NULL)
mch_memmove(new_channels, channels, sizeof(channel_T) * channel_count);
channels = new_channels;
channels[channel_count].ch_fd = (sock_T)-1;
return channel_count++;
}
#if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
static int netbeans_channel = -1;
/*
* Add the netbeans socket to the channels.
* Return the channel index.
*/
int
channel_add_netbeans(sock_T fd)
{
int idx = add_channel();
if (idx >= 0)
{
channels[idx].ch_fd = fd;
netbeans_channel = idx;
}
return idx;
}
void
channel_remove_netbeans()
{
channels[netbeans_channel].ch_fd = (sock_T)-1;
netbeans_channel = -1;
}
#endif
static void
channel_read(int idx)
{
# ifdef FEAT_NETBEANS_INTG
if (idx == netbeans_channel)
netbeans_read();
else
# endif
{
; /* TODO: read */
}
}
#if (defined(UNIX) && !defined(HAVE_SELECT)) || defined(PROTO)
/*
* Add open channels to the poll struct.
* Return the adjusted struct index.
* The type of "fds" is hidden to avoid problems with the function proto.
*/
int
channel_poll_setup(int nfd_in, void *fds_in)
{
int nfd = nfd_in;
int i;
struct pollfd *fds = fds_in;
for (i = 0; i < channel_count; ++i)
if (channels[i].ch_fd >= 0)
{
channels[i].ch_idx = nfd;
fds[nfd].fd = channels[i].ch_fd;
fds[nfd].events = POLLIN;
nfd++;
}
else
channels[i].ch_idx = -1;
return nfd;
}
/*
* The type of "fds" is hidden to avoid problems with the function proto.
*/
int
channel_poll_check(int ret_in, void *fds_in)
{
int ret = ret_in;
int i;
struct pollfd *fds = fds_in;
for (i = 0; i < channel_count; ++i)
if (ret > 0 && channels[i].ch_idx != -1
&& fds[channels[i].ch_idx].revents & POLLIN)
{
channel_read(i);
--ret;
}
return ret;
}
#endif /* UNIX && !HAVE_SELECT */
#if (defined(UNIX) && defined(HAVE_SELECT)) || defined(PROTO)
/*
* The type of "rfds" is hidden to avoid problems with the function proto.
*/
int
channel_select_setup(int maxfd_in, void *rfds_in)
{
int maxfd = maxfd_in;
int i;
fd_set *rfds = rfds_in;
for (i = 0; i < channel_count; ++i)
if (channels[i].ch_fd >= 0)
{
FD_SET(channels[i].ch_fd, rfds);
if (maxfd < channels[i].ch_fd)
maxfd = channels[i].ch_fd;
}
return maxfd;
}
/*
* The type of "rfds" is hidden to avoid problems with the function proto.
*/
int
channel_select_check(int ret_in, void *rfds_in)
{
int ret = ret_in;
int i;
fd_set *rfds = rfds_in;
for (i = 0; i < channel_count; ++i)
if (ret > 0 && channels[i].ch_fd >= 0
&& FD_ISSET(channels[i].ch_fd, rfds))
{
channel_read(i);
--ret;
}
return ret;
}
#endif /* UNIX && HAVE_SELECT */
#endif /* FEAT_CHANNEL */
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