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/****************************************************************************
NAME
rtcm2_json.c - deserialize RTCM2 JSON
DESCRIPTION
This module uses the generic JSON parser to get data from RTCM2
representations to libgps structures.
***************************************************************************/
#include <math.h>
#include <assert.h>
#include <string.h>
#include <stddef.h>
#include <stdio.h>
#include "gpsd_config.h"
#include "gpsd.h"
#include "gps_json.h"
/* common fields in every RTCM2 message */
int json_rtcm2_read(const char *buf,
char *path, size_t pathlen,
struct rtcm2_t *rtcm2,
const char **endptr)
{
#define RTCM2_HEADER \
{"class", check, .dflt.check = "RTCM2"}, \
{"type", uinteger, .addr.uinteger = &rtcm2->type}, \
{"device", string, .addr.string = path, \
.len = pathlen}, \
{"station_id", uinteger, .addr.uinteger = &rtcm2->refstaid}, \
{"zcount", real, .addr.real = &rtcm2->zcount, \
.dflt.real = NAN}, \
{"seqnum", uinteger, .addr.uinteger = &rtcm2->seqnum}, \
{"length", uinteger, .addr.uinteger = &rtcm2->length}, \
{"station_health", uinteger, .addr.uinteger = &rtcm2->stathlth},
int status, satcount;
const struct json_attr_t rtcm1_satellite[] = {
{"ident", STRUCTOBJECT(uinteger, struct rangesat_t, ident)},
{"udre", STRUCTOBJECT(uinteger, struct rangesat_t, udre)},
{"issuedata", STRUCTOBJECT(real, struct rangesat_t, issuedata)},
{"rangerr", STRUCTOBJECT(real, struct rangesat_t, rangerr)},
{"rangerate", STRUCTOBJECT(real, struct rangesat_t, rangerate)},
{NULL},
};
const struct json_attr_t json_rtcm1[] = {
RTCM2_HEADER
{"satellites", STRUCTARRAY(rtcm2->ranges.sat,
rtcm1_satellite, &satcount)},
{NULL},
};
const struct json_attr_t json_rtcm3[] = {
RTCM2_HEADER
{"valid", boolean, .addr.boolean = &rtcm2->reference.valid},
{"x", real, .addr.real = &rtcm2->ecef.x,
.dflt.real = NAN},
{"y", real, .addr.real = &rtcm2->ecef.y,
.dflt.real = NAN},
{"z", real, .addr.real = &rtcm2->ecef.z,
.dflt.real = NAN},
{NULL},
};
const struct json_attr_t json_rtcm4[] = {
RTCM2_HEADER
{"valid", boolean, .addr.boolean = &rtcm2->reference.valid},
{"system", integer, .addr.integer = &rtcm2->reference.system},
{"sense", integer, .addr.integer = &rtcm2->reference.sense},
{"datum", string, .addr.string = rtcm2->reference.datum,
.len = sizeof(rtcm2->reference.datum)},
{"dx", real, .addr.real = &rtcm2->reference.dx,
.dflt.real = NAN},
{"dy", real, .addr.real = &rtcm2->reference.dy,
.dflt.real = NAN},
{"dz", real, .addr.real = &rtcm2->reference.dz,
.dflt.real = NAN},
{NULL},
};
const struct json_attr_t json_rtcm5[] = {
// FIXME
RTCM2_HEADER
{NULL},
};
const struct json_attr_t json_rtcm6[] = {
RTCM2_HEADER
// No-op or keepalive message
{NULL},
};
const struct json_attr_t json_rtcm7[] = {
// FIXME
RTCM2_HEADER
{NULL},
};
const struct json_attr_t json_rtcm16[] = {
RTCM2_HEADER
{"message", string, .addr.string = rtcm2->message,
.len = sizeof(rtcm2->message)},
{NULL},
};
const struct json_attr_t json_rtcm_fallback[] = {
// FIXME
RTCM2_HEADER
{NULL},
};
#undef STRUCTARRAY
#undef STRUCTOBJECT
#undef RTCM2_HEADER
memset(rtcm2, '\0', sizeof(struct rtcm2_t));
if (strstr(buf, "\"type\":1")!=NULL || strstr(buf, "\"type\":9")!=NULL) {
status = json_read_object(buf, json_rtcm1, endptr);
if (status == 0)
rtcm2->ranges.nentries = (unsigned)satcount;
} else if (strstr(buf, "\"type\":3") != NULL)
status = json_read_object(buf, json_rtcm3, endptr);
else if (strstr(buf, "\"type\":4") != NULL) {
status = json_read_object(buf, json_rtcm4, endptr);
} else if (strstr(buf, "\"type\":5") != NULL)
status = json_read_object(buf, json_rtcm5, endptr);
else if (strstr(buf, "\"type\":6") != NULL)
status = json_read_object(buf, json_rtcm6, endptr);
else if (strstr(buf, "\"type\":7") != NULL)
status = json_read_object(buf, json_rtcm7, endptr);
else if (strstr(buf, "\"type\":16") != NULL)
status = json_read_object(buf, json_rtcm16, endptr);
else
status = json_read_object(buf, json_rtcm_fallback, endptr);
if (status != 0)
return status;
return 0;
}
/* rtcm2_json.c ends here */
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