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#include <string.h>
#include <uv.h>
#include <msgpack.h>
#include "nvim/api/private/helpers.h"
#include "nvim/os/channel.h"
#include "nvim/os/channel_defs.h"
#include "nvim/os/rstream.h"
#include "nvim/os/rstream_defs.h"
#include "nvim/os/wstream.h"
#include "nvim/os/wstream_defs.h"
#include "nvim/os/job.h"
#include "nvim/os/job_defs.h"
#include "nvim/os/msgpack_rpc.h"
#include "nvim/vim.h"
#include "nvim/memory.h"
#include "nvim/map.h"
typedef struct {
uint64_t id;
ChannelProtocol protocol;
bool is_job;
union {
struct {
msgpack_unpacker *unpacker;
msgpack_sbuffer *sbuffer;
} msgpack;
} proto;
union {
int job_id;
struct {
RStream *read;
WStream *write;
uv_stream_t *uv;
} streams;
} data;
} Channel;
static uint64_t next_id = 1;
static Map(uint64_t) *channels = NULL;
static msgpack_sbuffer msgpack_event_buffer;
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);
static void send_msgpack(Channel *channel, String type, Object data);
static void close_channel(Channel *channel);
static void close_cb(uv_handle_t *handle);
void channel_init()
{
channels = map_new(uint64_t)();
msgpack_sbuffer_init(&msgpack_event_buffer);
}
void channel_teardown()
{
if (!channels) {
return;
}
Channel *channel;
map_foreach_value(channels, channel, {
close_channel(channel);
});
}
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->id = next_id++;
channel->protocol = prot;
channel->is_job = true;
channel->data.job_id = job_start(argv, channel, rcb, on_job_stderr, NULL);
map_put(uint64_t)(channels, channel->id, 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->id = next_id++;
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);
channel->data.streams.uv = stream;
map_put(uint64_t)(channels, channel->id, channel);
}
bool channel_send_event(uint64_t id, char *type, typval_T *data)
{
Channel *channel = map_get(uint64_t)(channels, id);
if (!channel) {
return false;
}
String event_type = {.size = strnlen(type, 1024), .data = type};
Object event_data = vim_to_object(data);
switch (channel->protocol) {
case kChannelProtocolMsgpack:
send_msgpack(channel, event_type, event_data);
break;
default:
abort();
}
msgpack_rpc_free_object(event_data);
return true;
}
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)
{
Channel *channel = data;
if (eof) {
close_channel(channel);
return;
}
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 unpacked;
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(channel->id, &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);
}
}
static void send_msgpack(Channel *channel, String type, Object data)
{
msgpack_packer packer;
msgpack_packer_init(&packer, &msgpack_event_buffer, msgpack_sbuffer_write);
msgpack_rpc_notification(type, data, &packer);
char *bytes = xmemdup(msgpack_event_buffer.data, msgpack_event_buffer.size);
wstream_write(channel->data.streams.write,
bytes,
msgpack_event_buffer.size,
true);
msgpack_sbuffer_clear(&msgpack_event_buffer);
}
static void close_channel(Channel *channel)
{
map_del(uint64_t)(channels, channel->id);
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);
uv_close((uv_handle_t *)channel->data.streams.uv, close_cb);
}
free(channel);
}
static void close_cb(uv_handle_t *handle)
{
free(handle->data);
free(handle);
}
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