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/****************************************************************************
NAME
ais_json.c - deserialize AIS JSON
DESCRIPTION
This module uses the generic JSON parser to get data from AIS
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 AIS message */
int json_ais_read(const char *buf,
char *path, size_t pathlen,
struct ais_t *ais,
const char **endptr)
{
#define AIS_HEADER \
{"class", check, .dflt.check = "AIS"}, \
{"type", uinteger, .addr.uinteger = &ais->type}, \
{"device", string, .addr.string = path, \
.len = pathlen}, \
{"repeat", uinteger, .addr.uinteger = &ais->repeat}, \
{"mmsi", uinteger, .addr.uinteger = &ais->mmsi},
int status;
const struct json_attr_t json_ais1[] = {
AIS_HEADER
{"status", uinteger, .addr.uinteger = &ais->type123.status},
{"turn", integer, .addr.integer = &ais->type123.turn},
{"speed", uinteger, .addr.uinteger = &ais->type123.speed},
{"accuracy", boolean, .addr.boolean = &ais->type123.accuracy},
{"lon", integer, .addr.integer = &ais->type123.lon},
{"lat", integer, .addr.integer = &ais->type123.lat},
{"course", uinteger, .addr.uinteger = &ais->type123.course},
{"heading", uinteger, .addr.uinteger = &ais->type123.heading},
{"second", uinteger, .addr.uinteger = &ais->type123.second},
{"maneuver", uinteger, .addr.uinteger = &ais->type123.maneuver},
{"raim", boolean, .addr.boolean = &ais->type123.raim},
{"radio", uinteger, .addr.uinteger = &ais->type123.radio},
{NULL},
};
const struct json_attr_t json_ais4[] = {
AIS_HEADER
{NULL},
};
const struct json_attr_t json_ais5[] = {
AIS_HEADER
{NULL},
};
const struct json_attr_t json_ais6[] = {
AIS_HEADER
{NULL},
};
const struct json_attr_t json_ais7[] = {
AIS_HEADER
{NULL},
};
const struct json_attr_t json_ais8[] = {
AIS_HEADER
{NULL},
};
const struct json_attr_t json_ais16[] = {
AIS_HEADER
{NULL},
};
#undef AIS_HEADER
memset(ais, '\0', sizeof(struct ais_t));
if (strstr(buf, "\"type\":1,")!=NULL || strstr(buf, "\"type\":2,")!=NULL || strstr(buf, "\"type\":3,")!=NULL) {
status = json_read_object(buf, json_ais1, endptr);
} else if (strstr(buf, "\"type\":4,") != NULL || strstr(buf, "\"type\":11,")!=NULL) {
status = json_read_object(buf, json_ais4, endptr);
} else if (strstr(buf, "\"type\":5,") != NULL) {
status = json_read_object(buf, json_ais5, endptr);
} else if (strstr(buf, "\"type\":6,") != NULL) {
status = json_read_object(buf, json_ais6, endptr);
} else if (strstr(buf, "\"type\":7,") != NULL) {
status = json_read_object(buf, json_ais7, endptr);
} else if (strstr(buf, "\"type\":8,") != NULL) {
status = json_read_object(buf, json_ais8, endptr);
} else if (strstr(buf, "\"type\":16,") != NULL) {
status = json_read_object(buf, json_ais16, endptr);
} else {
return JSON_ERR_MISC;
}
return status;
}
/* ais_json.c ends here */
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