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Header parsing

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xamidev
2025-11-07 21:07:16 +01:00
parent 3eb2f57103
commit fa1a02371c
4 changed files with 88 additions and 19 deletions
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5
README.md
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@@ -4,6 +4,11 @@ Work in progress.
Goals are: parsing an IGC file containing flight data, giving analytics about the flight, and if I really have time to kill, making some kind of (3D??) view of the flight..
TODO:
- header parsing
- data point doubly linked list
- Raylib 3d 3rd person flight line visualization????
# License
GNU GPL v3

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a.out
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67
igc.c
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@@ -50,17 +50,61 @@ struct IGC_DataPoint* parse_datapoint(char* line)
dp->baro_alt = atoi(baro_alt);
dp->gps_alt = atoi(gps_alt);
printf("Data point: %d:%d:%d | %d°%d'%d\"%c %d°%d'%d\"%c | Baro: %dm GPS: %dm\n", dp->hour, dp->minute, dp->second, dp->lat.deg, dp->lat.min, dp->lat.sec, dp->lat.cardinal, dp->lon.deg, dp->lon.min, dp->lon.sec, dp->lon.cardinal, dp->baro_alt, dp->gps_alt);
return dp;
}
void parse_header_record(char* line)
void show_datapoint(struct IGC_DataPoint* dp)
{
printf("Data point: %02d:%02d:%02d | %d°%d'%d\"%c %d°%d'%d\"%c | Baro: %dm GPS: %dm\n", dp->hour, dp->minute, dp->second, dp->lat.deg, dp->lat.min, dp->lat.sec, dp->lat.cardinal, dp->lon.deg, dp->lon.min, dp->lon.sec, dp->lon.cardinal, dp->baro_alt, dp->gps_alt);
}
void show_header_info(struct IGC_Header* hdr)
{
printf("*** Flight information:\nDate: %02d/%02d/%02d\nPilot: %sCopilot: %sAircraft: %sRegistration: %s", hdr->day, hdr->month, hdr->year, hdr->pilot_name, hdr->crew2_name, hdr->aircraft_name, hdr->aircraft_registration_no);
}
struct IGC_Header* parse_header_record(struct IGC_Header* hdr, char* line)
{
if (strncmp(line, "HFDTEDATE", 9) == 0)
{
strtok(line, ":");
char* date_str = strtok(NULL, ":");
char day[3], month[3], year[3] = {0};
memcpy(day, date_str, 2);
memcpy(month, date_str+2, 2);
memcpy(year, date_str+4, 2);
hdr->day = atoi(day);
hdr->month = atoi(month);
hdr->year = atoi(year);
}
if (strncmp(line, "HFPLTPILOTINCHARGE", 18) == 0)
{
strtok(line, ":");
strncpy(hdr->pilot_name, strtok(NULL, ":"), SMALL_NAME_MAX);
}
if (strncmp(line, "HFCM2CREW2", 10) == 0)
{
strtok(line, ":");
strncpy(hdr->crew2_name, strtok(NULL, ":"), SMALL_NAME_MAX);
}
if (strncmp(line, "HFGTYGLIDERTYPE", 15) == 0)
{
strtok(line, ":");
strncpy(hdr->aircraft_name, strtok(NULL, ":"), SMALL_NAME_MAX);
}
if (strncmp(line, "HFGIDGLIDERID", 13) == 0)
{
strtok(line, ":");
strncpy(hdr->aircraft_registration_no, strtok(NULL, ":"), SMALL_NAME_MAX);
}
if (strncmp(line, "HFDTMGPSDATUM", 13) == 0)
{
strtok(line, ":");
strncpy(hdr->gps_datum, strtok(NULL, ":"), SMALL_NAME_MAX);
}
return hdr;
}
void parse_igc_file(FILE* fp)
@@ -68,23 +112,36 @@ void parse_igc_file(FILE* fp)
size_t len = 0;
char* line = NULL;
struct IGC_Header* hdr = (struct IGC_Header*)calloc(1, sizeof(struct IGC_Header));
while (getline(&line, &len, fp) != -1)
{
switch(line[0])
{
case MANUFACTURER:
printf("Manufacturer info: %s", line);
break;
case COMMENT:
printf("Comment: %s", line);
break;
case DATAPOINT:
struct IGC_DataPoint* dp = parse_datapoint(line);
// show_datapoint(dp);
// Doubly linked list of points (so theyre joined in chronological order; opens possibilities for analysis later)
// append_datapoint(dp);
break;
case HEADER:
parse_header_record(line);
hdr = parse_header_record(hdr, line);
break;
case SEC_KEY:
printf("Security key found: %s", line);
break;
default:
printf("Unrecognized record type '%c'\n", line[0]);
printf("Unhandled record type '%c'\n", line[0]);
break;
}
}
show_header_info(hdr);
}
int main(int argc, char* argv[])

33
igc.h
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@@ -9,11 +9,10 @@
#ifndef IGC_H
#define IGC_H
#define SMALL_NAME_MAX 32
#define NAME_MAX 256
#define TMP_SIZE 8
void parse_igc_file(FILE* fp);
enum IGC_RecordType
{
MANUFACTURER = 'A',
@@ -27,7 +26,7 @@ enum IGC_RecordType
PILOT_EVENT = 'E',
GEN_PURPOSE_PLACEHOLDER = 'K',
COMMENT = 'L',
SEC_KEY = 'G'
SEC_KEY = 'G',
};
enum Cardinals
@@ -53,16 +52,18 @@ struct IGC_Header
int year;
// Not exhaustive
char pilot_name[NAME_MAX] = {0};
char crew2_name[NAME_MAX] = {0};
char aircraft_name[NAME_MAX] = {0};
char aircraft_registration_no[NAME_MAX] = {0};
char gps_datum[NAME_MAX] = {0};
char firmware_ver[NAME_MAX] = {0};
char hardware_ver[NAME_MAX] = {0};
char frtype[NAME_MAX] = {0};
char press_alt_sensor[NAME_MAX] = {0};
}
char pilot_name[NAME_MAX];
char crew2_name[NAME_MAX];
char aircraft_name[NAME_MAX];
char aircraft_registration_no[NAME_MAX];
char gps_datum[NAME_MAX];
// (not too important; ignored for now, may be part of "verbose" setting later)
char firmware_ver[NAME_MAX];
char hardware_ver[NAME_MAX];
char frtype[NAME_MAX];
char press_alt_sensor[NAME_MAX];
};
struct IGC_DataPoint
{
@@ -80,4 +81,10 @@ struct IGC_DataPoint
int gps_alt;
};
void parse_igc_file(FILE* fp);
struct IGC_DataPoint* parse_datapoint(char* line);
void show_datapoint(struct IGC_DataPoint* dp);
void show_header_info(struct IGC_Header* hdr);
struct IGC_Header* parse_header_record(struct IGC_Header* hdr, char* line);
#endif