65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
#include <assert.h>
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#include <stdio.h>
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#include "client.h"
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#include "json.h"
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// Hobo JSON to avoid overhead. Assumes that we can't get quotes in the data.
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void json_init() {
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}
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static size_t json_hello(char *buf) {
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int len = snprintf(buf, SERIALIZE_LEN,
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"{\"mlat_timestamp_mhz\":%ju,\"mlat_timestamp_max\":%ju,\"rssi_max\":%ju}\n",
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(uintmax_t) MLAT_MHZ,
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(uintmax_t) MLAT_MAX,
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(uintmax_t) RSSI_MAX);
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assert(len < SERIALIZE_LEN);
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return len;
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}
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static size_t json_serialize_mode_s_short(struct packet *packet, char *buf) {
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char hexbuf[14];
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hex_from_bin(hexbuf, packet->payload, 7);
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int len = snprintf(buf, SERIALIZE_LEN,
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"{\"payload\":\"%.14s\",\"mlat_timestamp\":%ju,\"rssi\":%ju}\n",
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hexbuf,
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(uintmax_t) packet->mlat_timestamp,
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(uintmax_t) packet->rssi);
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assert(len < SERIALIZE_LEN);
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return len;
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}
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static size_t json_serialize_mode_s_long(struct packet *packet, char *buf) {
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char hexbuf[28];
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hex_from_bin(hexbuf, packet->payload, 14);
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int len = snprintf(buf, SERIALIZE_LEN,
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"{\"payload\":\"%.28s\",\"mlat_timestamp\":%ju,\"rssi\":%ju}\n",
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hexbuf,
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(uintmax_t) packet->mlat_timestamp,
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(uintmax_t) packet->rssi);
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assert(len < SERIALIZE_LEN);
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return len;
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}
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size_t json_serialize(struct packet *packet, char *buf) {
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if (!packet) {
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return json_hello(buf);
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}
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switch (packet->type) {
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case MODE_AC:
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return 0;
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case MODE_S_SHORT:
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return json_serialize_mode_s_short(packet, buf);
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case MODE_S_LONG:
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return json_serialize_mode_s_long(packet, buf);
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}
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return 0;
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}
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