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/****************************************************************************
NAME
gpsd_json.c - move data between in-core and JSON structures
DESCRIPTION
This module uses the generic JSON parser to get data from JSON
representations to gpsd core strctures, and vice_versa.
***************************************************************************/
#include <math.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "gpsd_config.h"
#include "gpsd.h"
#include "gps_json.h"
void json_tpv_dump(struct gps_data_t *gpsdata, struct gps_fix_t *fixp,
char *reply, size_t replylen)
{
assert(replylen > 2);
(void)strlcpy(reply, "{\"class\":\"TPV\",", replylen);
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"tag\":\"%s\",",
gpsdata->tag[0]!='\0' ? gpsdata->tag : "-");
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"device\":\"%s\",",
gpsdata->gps_device);
if (isnan(fixp->time)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"time\":%.3f,",
fixp->time);
if (isnan(fixp->ept)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"ept\":%.3f,",
fixp->ept);
if (isnan(fixp->latitude)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"lat\":%.9f,",
fixp->latitude);
if (isnan(fixp->longitude)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"lon\":%.9f,",
fixp->longitude);
if (isnan(fixp->altitude)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"alt\":%.3f,",
fixp->altitude);
if (isnan(fixp->eph)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"eph\":%.3f,",
fixp->eph);
if (isnan(fixp->epv)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"epv\":%.3f,",
fixp->epv);
if (isnan(fixp->track)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"track\":%.4f,",
fixp->track);
if (isnan(fixp->speed)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"speed\":%.3f,",
fixp->speed);
if (isnan(fixp->climb)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"climb\":%.3f,",
fixp->climb);
if (isnan(fixp->epd)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"epd\":%.4f,",
fixp->epd);
if (isnan(fixp->eps)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"eps\":%.2f,", fixp->eps);
if (isnan(fixp->epc)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"epc\":%.2f,", fixp->epc);
if (fixp->mode > 0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"mode\":%d,", fixp->mode);
if (reply[strlen(reply)-1] == ',')
reply[strlen(reply)-1] = '\0'; /* trim trailing comma */
(void)strlcat(reply, "}", sizeof(reply)-strlen(reply));
}
void json_sky_dump(struct gps_data_t *datap, char *reply, size_t replylen)
{
int i, j, used, reported = 0;
assert(replylen > 2);
(void)strlcpy(reply, "{\"class\":\"SKY\",", replylen);
(void)snprintf(reply+strlen(reply),
replylen- strlen(reply),
"\"tag\":\"%s\",",
datap->tag[0]!='\0' ? datap->tag : "-");
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"device\":\"%s\",",
datap->gps_device);
if (isnan(datap->sentence_time)==0)
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"time\":%.3f ",
datap->sentence_time);
/* insurance against flaky drivers */
for (i = 0; i < datap->satellites; i++)
if (datap->PRN[i])
reported++;
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"\"reported\":%d,", reported);
if (reported) {
(void)strlcat(reply, "\"satellites\":[", replylen);
for (i = 0; i < reported; i++) {
used = 0;
for (j = 0; j < datap->satellites_used; j++)
if (datap->used[j] == datap->PRN[i]) {
used = 1;
break;
}
if (datap->PRN[i]) {
(void)snprintf(reply+strlen(reply),
replylen-strlen(reply),
"{\"PRN\":%d,\"el\":%d,\"az\":%d,\"ss\":%.0f,\"used\":%s},",
datap->PRN[i],
datap->elevation[i],datap->azimuth[i],
datap->ss[i],
used ? "true" : "false");
}
}
reply[strlen(reply)-1] = '\0'; /* trim trailing comma */
(void)strlcat(reply, "]", replylen-strlen(reply));
}
(void)strlcat(reply, "}", replylen-strlen(reply));
if (datap->satellites != reported)
gpsd_report(LOG_WARN,"Satellite count %d != PRN count %d\n",
datap->satellites, reported);
}
void json_device_dump(struct gps_device_t *device,
char *reply, size_t replylen)
{
struct classmap_t *cmp;
(void)strlcpy(reply, "{\"class\":\"DEVICE\",\"path\":\"", replylen);
(void)strlcat(reply, device->gpsdata.gps_device, replylen);
(void)strlcat(reply, "\",", replylen);
(void)snprintf(reply+strlen(reply), replylen-strlen(reply),
"\"activated\":%2.2f,", device->gpsdata.online);
if (device->observed != 0) {
int mask = 0;
for (cmp = classmap; cmp < classmap+NITEMS(classmap); cmp++)
if ((device->observed & cmp->packetmask) != 0)
mask |= cmp->typemask;
if (mask != 0)
(void)snprintf(reply+strlen(reply), replylen-strlen(reply),
"\"flags\":%d,", mask);
}
if (device->device_type != NULL) {
(void)strlcat(reply, "\"driver\":\"", replylen);
(void)strlcat(reply,
device->device_type->type_name,
replylen);
(void)strlcat(reply, "\",", replylen);
}
if (device->subtype[0] != '\0') {
(void)strlcat(reply, "\"subtype\":\"", replylen);
(void)strlcat(reply,
device->subtype,
replylen);
(void)strlcat(reply, "\",", replylen);
}
if (reply[strlen(reply)-1] == ',')
reply[strlen(reply)-1] = '\0';
(void)strlcat(reply, "}", replylen);
}
int json_watch_read(struct policy_t *ccp,
const char *buf, const char **endptr)
{
int intcasoc;
struct json_attr_t chanconfig_attrs[] = {
{"raw", integer, .addr.integer = &ccp->raw,
.dflt.integer = -1},
{"buffer_policy", integer, .addr.integer = &intcasoc,
.dflt.integer = -1},
{"scaled", boolean, .addr.boolean = &ccp->scaled},
{NULL},
};
int status;
status = json_read_object(buf, chanconfig_attrs, endptr);
if (status == 0) {
if (intcasoc != -1)
ccp->buffer_policy = intcasoc;
}
return status;
}
void json_watch_dump(struct policy_t *ccp, char *reply, size_t replylen)
{
(void)snprintf(reply+strlen(reply), replylen-strlen(reply),
"{\"class\":\"WATCH\",\"raw\":%d,\"buffer_policy\":%d,\"scaled\":%s}",
ccp->raw,
ccp->buffer_policy,
ccp->scaled ? "true" : "false");
}
int json_configdev_read(struct devconfig_t *cdp, const char *buf, const char **endptr)
{
struct json_attr_t devconfig_attrs[] = {
{"device", string, .addr.string.ptr=cdp->device,
.addr.string.len=sizeof(cdp->device)},
{"native", integer, .addr.integer = &cdp->native,
.dflt.integer = -1},
{"bps", integer, .addr.integer = &cdp->bps,
.dflt.integer = -1},
{"serialmode", string, .addr.string.ptr=cdp->serialmode,
.addr.string.len=sizeof(cdp->serialmode)},
{"cycle", real, .addr.real = &cdp->cycle,
.dflt.real = NAN},
{"mincycle", real, .addr.real = &cdp->mincycle,
.dflt.real = NAN},
{NULL},
};
return json_read_object(buf, devconfig_attrs, endptr);
}
void json_configdev_dump(struct gps_device_t *devp, char *reply, size_t replylen)
{
(void)snprintf(reply, replylen,
"{\"class\":\"CONFIGDEV\",\"device\":\"%s\",\"native\":%d,\"bps\":%d,\"serialmode\":\"%u%c%u\",\"cycle\":%2.2f",
devp->gpsdata.gps_device,
devp->gpsdata.driver_mode,
(int)gpsd_get_speed(&devp->ttyset),
9 - devp->gpsdata.stopbits,
(int)devp->gpsdata.parity,
devp->gpsdata.stopbits,
devp->gpsdata.cycle);
if (devp->device_type->rate_switcher != NULL)
(void)snprintf(reply+strlen(reply), replylen-strlen(reply),
",\"mincycle\":%2.2f",
devp->device_type->min_cycle);
(void)strlcat(reply, "}", replylen);
}
/* gpsd_json.c ends here */
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