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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 <stdlib.h>
#include <stdio.h>
#include "gpsd_config.h"
#include "gpsd.h"
#include "gps_json.h"
/*@ -mustdefine @*/
static void lenhex_unpack(const char *from,
size_t *plen, /*@out@*/char *to, size_t maxlen)
{
char *colon = strchr(from, ':');
*plen = (size_t)atoi(from);
if (colon != NULL)
(void)gpsd_hexpack(colon+1, to, maxlen);
}
/*@ +mustdefine @*/
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;
#include "ais_json.i" /* JSON parser template structures */
#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);
if (status == 0) {
ais->type4.year = AIS_YEAR_NOT_AVAILABLE;
ais->type4.month = AIS_MONTH_NOT_AVAILABLE;
ais->type4.day = AIS_DAY_NOT_AVAILABLE;
ais->type4.hour = AIS_HOUR_NOT_AVAILABLE;
ais->type4.minute = AIS_MINUTE_NOT_AVAILABLE;
ais->type4.second = AIS_SECOND_NOT_AVAILABLE;
(void)sscanf(timestamp, "%4u-%02u-%02uT%02u:%02u:%02uZ",
&ais->type4.year,
&ais->type4.month,
&ais->type4.day,
&ais->type4.hour,
&ais->type4.minute,
&ais->type4.second);
}
} else if (strstr(buf, "\"type\":5,") != NULL) {
status = json_read_object(buf, json_ais5, endptr);
if (status == 0) {
ais->type5.month = AIS_MONTH_NOT_AVAILABLE;
ais->type5.day = AIS_DAY_NOT_AVAILABLE;
ais->type5.hour = AIS_HOUR_NOT_AVAILABLE;
ais->type5.minute = AIS_MINUTE_NOT_AVAILABLE;
(void)sscanf(eta, "%02u-%02uT%02u:%02uZ",
&ais->type5.month,
&ais->type5.day,
&ais->type5.hour,
&ais->type5.minute);
}
} else if (strstr(buf, "\"type\":6,") != NULL) {
status = json_read_object(buf, json_ais6, endptr);
if (status == 0)
lenhex_unpack(data, &ais->type6.bitcount,
ais->type6.bitdata, sizeof(ais->type6.bitdata));
} else if (strstr(buf, "\"type\":7,") != NULL || strstr(buf, "\"type\":13,") != NULL) {
status = json_read_object(buf, json_ais7, endptr);
} else if (strstr(buf, "\"type\":8,") != NULL) {
status = json_read_object(buf, json_ais8, endptr);
if (status == 0)
lenhex_unpack(data, &ais->type8.bitcount,
ais->type8.bitdata, sizeof(ais->type8.bitdata));
} else if (strstr(buf, "\"type\":9,") != NULL) {
status = json_read_object(buf, json_ais9, endptr);
} else if (strstr(buf, "\"type\":10,") != NULL) {
status = json_read_object(buf, json_ais10, endptr);
} else if (strstr(buf, "\"type\":12,") != NULL) {
status = json_read_object(buf, json_ais12, endptr);
} else if (strstr(buf, "\"type\":14,") != NULL) {
status = json_read_object(buf, json_ais14, endptr);
} else if (strstr(buf, "\"type\":15,") != NULL) {
status = json_read_object(buf, json_ais15, endptr);
} else if (strstr(buf, "\"type\":16,") != NULL) {
status = json_read_object(buf, json_ais16, endptr);
} else if (strstr(buf, "\"type\":17,") != NULL) {
status = json_read_object(buf, json_ais17, endptr);
if (status == 0)
lenhex_unpack(data, &ais->type17.bitcount,
ais->type17.bitdata, sizeof(ais->type17.bitdata));
} else if (strstr(buf, "\"type\":18,") != NULL) {
status = json_read_object(buf, json_ais18, endptr);
} else if (strstr(buf, "\"type\":18,") != NULL) {
status = json_read_object(buf, json_ais17, endptr);
} else if (strstr(buf, "\"type\":19,") != NULL) {
status = json_read_object(buf, json_ais19, endptr);
} else if (strstr(buf, "\"type\":20,") != NULL) {
status = json_read_object(buf, json_ais20, endptr);
} else if (strstr(buf, "\"type\":21,") != NULL) {
status = json_read_object(buf, json_ais21, endptr);
} else if (strstr(buf, "\"type\":22,") != NULL) {
status = json_read_object(buf, json_ais22, endptr);
} else if (strstr(buf, "\"type\":24,") != NULL) {
status = json_read_object(buf, json_ais24, endptr);
} else {
*endptr = NULL;
return JSON_ERR_MISC;
}
return status;
}
/* ais_json.c ends here */
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