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#include <string.h>
#include <uv.h>
#include <msgpack.h>
#include "lib/klist.h"
#include "os/channel.h"
#include "os/channel_defs.h"
#include "os/rstream.h"
#include "os/rstream_defs.h"
#include "os/wstream.h"
#include "os/wstream_defs.h"
#include "os/job.h"
#include "os/job_defs.h"
#include "os/msgpack_rpc.h"
#include "vim.h"
#include "memory.h"
typedef struct {
ChannelProtocol protocol;
bool is_job;
union {
struct {
msgpack_unpacker *unpacker;
msgpack_sbuffer *sbuffer;
} msgpack;
} proto;
union {
int job_id;
struct {
RStream *read;
WStream *write;
} streams;
} data;
} Channel;
#define _destroy_channel(x)
KLIST_INIT(Channel, Channel *, _destroy_channel)
static klist_t(Channel) *channels = NULL;
static void on_job_stdout(RStream *rstream, void *data, bool eof);
static void on_job_stderr(RStream *rstream, void *data, bool eof);
static void parse_msgpack(RStream *rstream, void *data, bool eof);
void channel_init()
{
channels = kl_init(Channel);
}
void channel_teardown()
{
if (!channels) {
return;
}
Channel *channel;
while (kl_shift(Channel, channels, &channel) == 0) {
switch (channel->protocol) {
case kChannelProtocolMsgpack:
msgpack_sbuffer_free(channel->proto.msgpack.sbuffer);
msgpack_unpacker_free(channel->proto.msgpack.unpacker);
break;
default:
abort();
}
if (channel->is_job) {
job_stop(channel->data.job_id);
} else {
rstream_free(channel->data.streams.read);
wstream_free(channel->data.streams.write);
}
}
}
void channel_from_job(char **argv, ChannelProtocol prot)
{
Channel *channel = xmalloc(sizeof(Channel));
rstream_cb rcb = NULL;
switch (prot) {
case kChannelProtocolMsgpack:
rcb = on_job_stdout;
channel->proto.msgpack.unpacker =
msgpack_unpacker_new(MSGPACK_UNPACKER_INIT_BUFFER_SIZE);
channel->proto.msgpack.sbuffer = msgpack_sbuffer_new();
break;
default:
abort();
}
channel->protocol = prot;
channel->is_job = true;
channel->data.job_id = job_start(argv, channel, rcb, on_job_stderr, NULL);
*kl_pushp(Channel, channels) = channel;
}
void channel_from_stream(uv_stream_t *stream, ChannelProtocol prot)
{
Channel *channel = xmalloc(sizeof(Channel));
rstream_cb rcb = NULL;
switch (prot) {
case kChannelProtocolMsgpack:
rcb = parse_msgpack;
channel->proto.msgpack.unpacker =
msgpack_unpacker_new(MSGPACK_UNPACKER_INIT_BUFFER_SIZE);
channel->proto.msgpack.sbuffer = msgpack_sbuffer_new();
break;
default:
abort();
}
stream->data = NULL;
channel->protocol = prot;
channel->is_job = false;
// read stream
channel->data.streams.read = rstream_new(rcb, 1024, channel, true);
rstream_set_stream(channel->data.streams.read, stream);
rstream_start(channel->data.streams.read);
// write stream
channel->data.streams.write = wstream_new(1024 * 1024);
wstream_set_stream(channel->data.streams.write, stream);
// push to channel list
*kl_pushp(Channel, channels) = channel;
}
static void on_job_stdout(RStream *rstream, void *data, bool eof)
{
Job *job = data;
parse_msgpack(rstream, job_data(job), eof);
}
static void on_job_stderr(RStream *rstream, void *data, bool eof)
{
// TODO(tarruda): plugin error messages should be sent to the error buffer
}
static void parse_msgpack(RStream *rstream, void *data, bool eof)
{
msgpack_unpacked unpacked;
Channel *channel = data;
uint32_t count = rstream_available(rstream);
// Feed the unpacker with data
msgpack_unpacker_reserve_buffer(channel->proto.msgpack.unpacker, count);
rstream_read(rstream,
msgpack_unpacker_buffer(channel->proto.msgpack.unpacker),
count);
msgpack_unpacker_buffer_consumed(channel->proto.msgpack.unpacker, count);
msgpack_unpacked_init(&unpacked);
// Deserialize everything we can.
while (msgpack_unpacker_next(channel->proto.msgpack.unpacker, &unpacked)) {
// Each object is a new msgpack-rpc request and requires an empty response
msgpack_packer response;
msgpack_packer_init(&response,
channel->proto.msgpack.sbuffer,
msgpack_sbuffer_write);
// Perform the call
msgpack_rpc_call(&unpacked.data, &response);
wstream_write(channel->data.streams.write,
xmemdup(channel->proto.msgpack.sbuffer->data,
channel->proto.msgpack.sbuffer->size),
channel->proto.msgpack.sbuffer->size,
true);
// Clear the buffer for future calls
msgpack_sbuffer_clear(channel->proto.msgpack.sbuffer);
}
}
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