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Dependencies:   PWM_Tone_Library DHT

M2XStreamClient/LocationParseFunctions.h@5:569a4894abc1, 2019-03-08 (annotated)

Committer:
aziz111
Date:
Fri Mar 08 17:15:02 2019 +0000
Revision:
5:569a4894abc1
Parent:
3:78f223d34f36 
Final

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ethaderu 3:78f223d34f36 1 #ifndef LocationParseFunctions_h
ethaderu 3:78f223d34f36 2 #define LocationParseFunctions_h
ethaderu 3:78f223d34f36 3
ethaderu 3:78f223d34f36 4 // Data structures and functions used to parse locations
ethaderu 3:78f223d34f36 5
ethaderu 3:78f223d34f36 6 #define LOCATION_BUF_LEN 20
ethaderu 3:78f223d34f36 7
ethaderu 3:78f223d34f36 8 typedef struct {
ethaderu 3:78f223d34f36 9 uint16_t state;
ethaderu 3:78f223d34f36 10 char name_str[LOCATION_BUF_LEN + 1];
ethaderu 3:78f223d34f36 11 double latitude;
ethaderu 3:78f223d34f36 12 double longitude;
ethaderu 3:78f223d34f36 13 double elevation;
ethaderu 3:78f223d34f36 14 char timestamp_str[LOCATION_BUF_LEN + 1];
ethaderu 3:78f223d34f36 15 int index;
ethaderu 3:78f223d34f36 16
ethaderu 3:78f223d34f36 17 location_read_callback callback;
ethaderu 3:78f223d34f36 18 void* context;
ethaderu 3:78f223d34f36 19 } location_parsing_context_state;
ethaderu 3:78f223d34f36 20
ethaderu 3:78f223d34f36 21 #define WAITING_NAME 0x1
ethaderu 3:78f223d34f36 22 #define WAITING_LATITUDE 0x2
ethaderu 3:78f223d34f36 23 #define WAITING_LONGITUDE 0x4
ethaderu 3:78f223d34f36 24 #define WAITING_ELEVATION 0x8
ethaderu 3:78f223d34f36 25 #define WAITING_TIMESTAMP 0x10
ethaderu 3:78f223d34f36 26
ethaderu 3:78f223d34f36 27 #define GOT_NAME 0x20
ethaderu 3:78f223d34f36 28 #define GOT_LATITUDE 0x40
ethaderu 3:78f223d34f36 29 #define GOT_LONGITUDE 0x80
ethaderu 3:78f223d34f36 30 #define GOT_ELEVATION 0x100
ethaderu 3:78f223d34f36 31 #define GOT_TIMESTAMP 0x200
ethaderu 3:78f223d34f36 32
ethaderu 3:78f223d34f36 33 #define GOT_LOCATION (GOT_NAME | GOT_LATITUDE | GOT_LONGITUDE | GOT_ELEVATION | GOT_TIMESTAMP)
ethaderu 3:78f223d34f36 34 #define TEST_GOT_LOCATION(state_) (((state_) & GOT_LOCATION) == GOT_LOCATION)
ethaderu 3:78f223d34f36 35
ethaderu 3:78f223d34f36 36 #define TEST_IS_NAME(state_) (((state_) & (WAITING_NAME | GOT_NAME)) == WAITING_NAME)
ethaderu 3:78f223d34f36 37 #define TEST_IS_LATITUDE(state_) (((state_) & (WAITING_LATITUDE | GOT_LATITUDE)) \
ethaderu 3:78f223d34f36 38 == WAITING_LATITUDE)
ethaderu 3:78f223d34f36 39 #define TEST_IS_LONGITUDE(state_) (((state_) & (WAITING_LONGITUDE | GOT_LONGITUDE)) \
ethaderu 3:78f223d34f36 40 == WAITING_LONGITUDE)
ethaderu 3:78f223d34f36 41 #define TEST_IS_ELEVATION(state_) (((state_) & (WAITING_ELEVATION | GOT_ELEVATION)) \
ethaderu 3:78f223d34f36 42 == WAITING_ELEVATION)
ethaderu 3:78f223d34f36 43 #define TEST_IS_TIMESTAMP(state_) (((state_) & (WAITING_TIMESTAMP | GOT_TIMESTAMP)) \
ethaderu 3:78f223d34f36 44 == WAITING_TIMESTAMP)
ethaderu 3:78f223d34f36 45
ethaderu 3:78f223d34f36 46 static void on_location_key_found(jsonlite_callback_context* context,
ethaderu 3:78f223d34f36 47 jsonlite_token* token) {
ethaderu 3:78f223d34f36 48 location_parsing_context_state* state =
ethaderu 3:78f223d34f36 49 (location_parsing_context_state*) context->client_state;
ethaderu 3:78f223d34f36 50 if (strncmp((const char*) token->start, "waypoints", 9) == 0) {
ethaderu 3:78f223d34f36 51 // only parses those locations in waypoints, skip the outer one
ethaderu 3:78f223d34f36 52 state->state = 0;
ethaderu 3:78f223d34f36 53 } else if (strncmp((const char*) token->start, "name", 4) == 0) {
ethaderu 3:78f223d34f36 54 state->state |= WAITING_NAME;
ethaderu 3:78f223d34f36 55 } else if (strncmp((const char*) token->start, "latitude", 8) == 0) {
ethaderu 3:78f223d34f36 56 state->state |= WAITING_LATITUDE;
ethaderu 3:78f223d34f36 57 } else if (strncmp((const char*) token->start, "longitude", 9) == 0) {
ethaderu 3:78f223d34f36 58 state->state |= WAITING_LONGITUDE;
ethaderu 3:78f223d34f36 59 } else if (strncmp((const char*) token->start, "elevation", 9) == 0) {
ethaderu 3:78f223d34f36 60 state->state |= WAITING_ELEVATION;
ethaderu 3:78f223d34f36 61 } else if (strncmp((const char*) token->start, "timestamp", 9) == 0) {
ethaderu 3:78f223d34f36 62 state->state |= WAITING_TIMESTAMP;
ethaderu 3:78f223d34f36 63 }
ethaderu 3:78f223d34f36 64 }
ethaderu 3:78f223d34f36 65
ethaderu 3:78f223d34f36 66 static void on_location_string_found(jsonlite_callback_context* context,
ethaderu 3:78f223d34f36 67 jsonlite_token* token) {
ethaderu 3:78f223d34f36 68 location_parsing_context_state* state =
ethaderu 3:78f223d34f36 69 (location_parsing_context_state*) context->client_state;
ethaderu 3:78f223d34f36 70
ethaderu 3:78f223d34f36 71 if (TEST_IS_NAME(state->state)) {
ethaderu 3:78f223d34f36 72 strncpy(state->name_str, (const char*) token->start,
ethaderu 3:78f223d34f36 73 MIN(token->end - token->start, LOCATION_BUF_LEN));
ethaderu 3:78f223d34f36 74 state->name_str[MIN(token->end - token->start, LOCATION_BUF_LEN)] = '\0';
ethaderu 3:78f223d34f36 75 state->state |= GOT_NAME;
ethaderu 3:78f223d34f36 76 } else if (TEST_IS_LATITUDE(state->state)) {
ethaderu 3:78f223d34f36 77 state->latitude = atof((const char*) token->start);
ethaderu 3:78f223d34f36 78 state->state |= GOT_LATITUDE;
ethaderu 3:78f223d34f36 79 } else if (TEST_IS_LONGITUDE(state->state)) {
ethaderu 3:78f223d34f36 80 state->longitude = atof((const char*) token->start);
ethaderu 3:78f223d34f36 81 state->state |= GOT_LONGITUDE;
ethaderu 3:78f223d34f36 82 } else if (TEST_IS_ELEVATION(state->state)) {
ethaderu 3:78f223d34f36 83 state->elevation = atof((const char*) token->start);
ethaderu 3:78f223d34f36 84 state->state |= GOT_ELEVATION;
ethaderu 3:78f223d34f36 85 } else if (TEST_IS_TIMESTAMP(state->state)) {
ethaderu 3:78f223d34f36 86 strncpy(state->timestamp_str, (const char*) token->start,
ethaderu 3:78f223d34f36 87 MIN(token->end - token->start, LOCATION_BUF_LEN));
ethaderu 3:78f223d34f36 88 state->timestamp_str[MIN(token->end - token->start, LOCATION_BUF_LEN)] = '\0';
ethaderu 3:78f223d34f36 89 state->state |= GOT_TIMESTAMP;
ethaderu 3:78f223d34f36 90 }
ethaderu 3:78f223d34f36 91
ethaderu 3:78f223d34f36 92 if (TEST_GOT_LOCATION(state->state)) {
ethaderu 3:78f223d34f36 93 state->callback(state->name_str, state->latitude, state->longitude,
ethaderu 3:78f223d34f36 94 state->elevation, state->timestamp_str, state->index++,
ethaderu 3:78f223d34f36 95 state->context);
ethaderu 3:78f223d34f36 96 state->state = 0;
ethaderu 3:78f223d34f36 97 }
ethaderu 3:78f223d34f36 98 }
ethaderu 3:78f223d34f36 99
ethaderu 3:78f223d34f36 100 #endif /* LocationParseFunctions_h */