Michael Ammann / M2XStreamClient

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LocationParseFunctions.h@11:5c71c2948812, 2014-09-13 (annotated)

Committer:
mazgch
Date:
Sat Sep 13 15:49:53 2014 +0000
Revision:
11:5c71c2948812
Parent:
0:f479e4f4db0e 
use local buffers and the flush or fill

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jb8414 0:f479e4f4db0e 1 #ifndef LocationParseFunctions_h
jb8414 0:f479e4f4db0e 2 #define LocationParseFunctions_h
jb8414 0:f479e4f4db0e 3
jb8414 0:f479e4f4db0e 4 // Data structures and functions used to parse locations
jb8414 0:f479e4f4db0e 5
jb8414 0:f479e4f4db0e 6 #define LOCATION_BUF_LEN 20
jb8414 0:f479e4f4db0e 7
jb8414 0:f479e4f4db0e 8 typedef struct {
jb8414 0:f479e4f4db0e 9 uint16_t state;
jb8414 0:f479e4f4db0e 10 char name_str[LOCATION_BUF_LEN + 1];
jb8414 0:f479e4f4db0e 11 double latitude;
jb8414 0:f479e4f4db0e 12 double longitude;
jb8414 0:f479e4f4db0e 13 double elevation;
jb8414 0:f479e4f4db0e 14 char timestamp_str[LOCATION_BUF_LEN + 1];
jb8414 0:f479e4f4db0e 15 int index;
jb8414 0:f479e4f4db0e 16
jb8414 0:f479e4f4db0e 17 location_read_callback callback;
jb8414 0:f479e4f4db0e 18 void* context;
jb8414 0:f479e4f4db0e 19 } location_parsing_context_state;
jb8414 0:f479e4f4db0e 20
jb8414 0:f479e4f4db0e 21 #define WAITING_NAME 0x1
jb8414 0:f479e4f4db0e 22 #define WAITING_LATITUDE 0x2
jb8414 0:f479e4f4db0e 23 #define WAITING_LONGITUDE 0x4
jb8414 0:f479e4f4db0e 24 #define WAITING_ELEVATION 0x8
jb8414 0:f479e4f4db0e 25 #define WAITING_TIMESTAMP 0x10
jb8414 0:f479e4f4db0e 26
jb8414 0:f479e4f4db0e 27 #define GOT_NAME 0x20
jb8414 0:f479e4f4db0e 28 #define GOT_LATITUDE 0x40
jb8414 0:f479e4f4db0e 29 #define GOT_LONGITUDE 0x80
jb8414 0:f479e4f4db0e 30 #define GOT_ELEVATION 0x100
jb8414 0:f479e4f4db0e 31 #define GOT_TIMESTAMP 0x200
jb8414 0:f479e4f4db0e 32
jb8414 0:f479e4f4db0e 33 #define GOT_LOCATION (GOT_NAME | GOT_LATITUDE | GOT_LONGITUDE | GOT_ELEVATION | GOT_TIMESTAMP)
jb8414 0:f479e4f4db0e 34 #define TEST_GOT_LOCATION(state_) (((state_) & GOT_LOCATION) == GOT_LOCATION)
jb8414 0:f479e4f4db0e 35
jb8414 0:f479e4f4db0e 36 #define TEST_IS_NAME(state_) (((state_) & (WAITING_NAME | GOT_NAME)) == WAITING_NAME)
jb8414 0:f479e4f4db0e 37 #define TEST_IS_LATITUDE(state_) (((state_) & (WAITING_LATITUDE | GOT_LATITUDE)) \
jb8414 0:f479e4f4db0e 38 == WAITING_LATITUDE)
jb8414 0:f479e4f4db0e 39 #define TEST_IS_LONGITUDE(state_) (((state_) & (WAITING_LONGITUDE | GOT_LONGITUDE)) \
jb8414 0:f479e4f4db0e 40 == WAITING_LONGITUDE)
jb8414 0:f479e4f4db0e 41 #define TEST_IS_ELEVATION(state_) (((state_) & (WAITING_ELEVATION | GOT_ELEVATION)) \
jb8414 0:f479e4f4db0e 42 == WAITING_ELEVATION)
jb8414 0:f479e4f4db0e 43 #define TEST_IS_TIMESTAMP(state_) (((state_) & (WAITING_TIMESTAMP | GOT_TIMESTAMP)) \
jb8414 0:f479e4f4db0e 44 == WAITING_TIMESTAMP)
jb8414 0:f479e4f4db0e 45
jb8414 0:f479e4f4db0e 46 static void on_location_key_found(jsonlite_callback_context* context,
jb8414 0:f479e4f4db0e 47 jsonlite_token* token) {
jb8414 0:f479e4f4db0e 48 location_parsing_context_state* state =
jb8414 0:f479e4f4db0e 49 (location_parsing_context_state*) context->client_state;
jb8414 0:f479e4f4db0e 50 if (strncmp((const char*) token->start, "waypoints", 9) == 0) {
jb8414 0:f479e4f4db0e 51 // only parses those locations in waypoints, skip the outer one
jb8414 0:f479e4f4db0e 52 state->state = 0;
jb8414 0:f479e4f4db0e 53 } else if (strncmp((const char*) token->start, "name", 4) == 0) {
jb8414 0:f479e4f4db0e 54 state->state |= WAITING_NAME;
jb8414 0:f479e4f4db0e 55 } else if (strncmp((const char*) token->start, "latitude", 8) == 0) {
jb8414 0:f479e4f4db0e 56 state->state |= WAITING_LATITUDE;
jb8414 0:f479e4f4db0e 57 } else if (strncmp((const char*) token->start, "longitude", 9) == 0) {
jb8414 0:f479e4f4db0e 58 state->state |= WAITING_LONGITUDE;
jb8414 0:f479e4f4db0e 59 } else if (strncmp((const char*) token->start, "elevation", 9) == 0) {
jb8414 0:f479e4f4db0e 60 state->state |= WAITING_ELEVATION;
jb8414 0:f479e4f4db0e 61 } else if (strncmp((const char*) token->start, "timestamp", 9) == 0) {
jb8414 0:f479e4f4db0e 62 state->state |= WAITING_TIMESTAMP;
jb8414 0:f479e4f4db0e 63 }
jb8414 0:f479e4f4db0e 64 }
jb8414 0:f479e4f4db0e 65
jb8414 0:f479e4f4db0e 66 static void on_location_string_found(jsonlite_callback_context* context,
jb8414 0:f479e4f4db0e 67 jsonlite_token* token) {
jb8414 0:f479e4f4db0e 68 location_parsing_context_state* state =
jb8414 0:f479e4f4db0e 69 (location_parsing_context_state*) context->client_state;
jb8414 0:f479e4f4db0e 70
jb8414 0:f479e4f4db0e 71 if (TEST_IS_NAME(state->state)) {
jb8414 0:f479e4f4db0e 72 strncpy(state->name_str, (const char*) token->start,
jb8414 0:f479e4f4db0e 73 MIN(token->end - token->start, LOCATION_BUF_LEN));
jb8414 0:f479e4f4db0e 74 state->name_str[MIN(token->end - token->start, LOCATION_BUF_LEN)] = '\0';
jb8414 0:f479e4f4db0e 75 state->state |= GOT_NAME;
jb8414 0:f479e4f4db0e 76 } else if (TEST_IS_LATITUDE(state->state)) {
jb8414 0:f479e4f4db0e 77 state->latitude = atof((const char*) token->start);
jb8414 0:f479e4f4db0e 78 state->state |= GOT_LATITUDE;
jb8414 0:f479e4f4db0e 79 } else if (TEST_IS_LONGITUDE(state->state)) {
jb8414 0:f479e4f4db0e 80 state->longitude = atof((const char*) token->start);
jb8414 0:f479e4f4db0e 81 state->state |= GOT_LONGITUDE;
jb8414 0:f479e4f4db0e 82 } else if (TEST_IS_ELEVATION(state->state)) {
jb8414 0:f479e4f4db0e 83 state->elevation = atof((const char*) token->start);
jb8414 0:f479e4f4db0e 84 state->state |= GOT_ELEVATION;
jb8414 0:f479e4f4db0e 85 } else if (TEST_IS_TIMESTAMP(state->state)) {
jb8414 0:f479e4f4db0e 86 strncpy(state->timestamp_str, (const char*) token->start,
jb8414 0:f479e4f4db0e 87 MIN(token->end - token->start, LOCATION_BUF_LEN));
jb8414 0:f479e4f4db0e 88 state->timestamp_str[MIN(token->end - token->start, LOCATION_BUF_LEN)] = '\0';
jb8414 0:f479e4f4db0e 89 state->state |= GOT_TIMESTAMP;
jb8414 0:f479e4f4db0e 90 }
jb8414 0:f479e4f4db0e 91
jb8414 0:f479e4f4db0e 92 if (TEST_GOT_LOCATION(state->state)) {
jb8414 0:f479e4f4db0e 93 state->callback(state->name_str, state->latitude, state->longitude,
jb8414 0:f479e4f4db0e 94 state->elevation, state->timestamp_str, state->index++,
jb8414 0:f479e4f4db0e 95 state->context);
jb8414 0:f479e4f4db0e 96 state->state = 0;
jb8414 0:f479e4f4db0e 97 }
jb8414 0:f479e4f4db0e 98 }
jb8414 0:f479e4f4db0e 99
jb8414 0:f479e4f4db0e 100 #endif /* LocationParseFunctions_h */