Incomplete parser

README.md

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+# igcp: IGC flight data parser
+
+Work in progress.
+
+# License
+
+GNU GPL v3

igc.c

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+/*
+ * IGC parser
+ * @brief parse IGC file, get all data points, compute average horizontal/vertical speed, print to STDOUT
+ *
+ * As per standard: https://xp-soaring.github.io/igc_file_format/igc_format_2008.html
+ *                  https://xp-soaring.github.io/igc_file_format/igc_fr_specification_with_al8_2023-2-1_0.pdf
+ *
+ * @author xamidev <xamidev@riseup.net>
+ * @license GNU GPL v3
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include "igc.h"
+
+void parse_igc_file(FILE* fp)
+{
+	size_t len = 0;
+	char* line = NULL;
+
+	while (getline(&line, &len, fp)	!= -1)
+	{
+		switch(line[0])
+		{
+			case DATAPOINT:
+				struct IGC_DataPoint* dp = (struct IGC_DataPoint*)malloc(sizeof(struct IGC_DataPoint));	
+				char hour[3], min[3], sec[3] = {0};
+				char lat_d[3], lat_m[3], lat_s[4] = {0};
+				char lon_d[4], lon_m[3], lon_s[4] = {0};
+
+				memcpy(hour, line+1, 2);
+				memcpy(min, line+3, 2);
+				memcpy(sec, line+5, 2);
+				memcpy(lat_d, line+7, 2);
+				memcpy(lat_m, line+9, 2);
+				memcpy(lat_s, line+11, 3);
+				memcpy(lon_d, line+15, 3);
+				memcpy(lon_m, line+18, 2);	
+				memcpy(lon_s, line+20, 3);
+
+				dp->hour = atoi(hour);
+				dp->minute = atoi(min);
+				dp->second = atoi(sec);
+				dp->lat.deg = atoi(lat_d);
+				dp->lat.min = atoi(lat_m);
+				dp->lat.sec = atoi(lat_s);
+				dp->lat.cardinal = line[14] == NORTH ? NORTH : SOUTH;
+				dp->lon.deg = atoi(lon_d);
+				dp->lon.min = atoi(lon_m);
+				dp->lon.sec = atoi(lon_s);
+				dp->lon.cardinal = line[23] == EAST ? EAST : WEST;
+				
+				printf("%s", line);
+				printf("Data point: %d:%d:%d | %d°%d'%d\"%c %d°%d'%d\"%c\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);
+
+				// Debug
+				exit(0);
+				break;
+			default:
+				break;
+		}
+	}
+}
+
+int main(int argc, char* argv[])
+{
+	if (argc < 2)
+	{
+		printf("Usage: %s <file>\n", argv[0]);
+		return -EINVAL;
+	}
+
+	char filename[NAME_MAX] = {0};
+	strncpy(filename, argv[1], NAME_MAX-1);
+
+	FILE* fp = fopen(filename, "r");
+
+	if (!fp)
+	{
+		printf("Couldn't open file %s\n", filename);
+		return -EINVAL;
+	}
+
+	parse_igc_file(fp);
+
+	return EXIT_SUCCESS;
+}

igc.h

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+/*
+ * IGC parser
+ * @brief parse IGC file, get all data points, compute average horizontal/vertical speed, print to STDOUT
+ *
+ * @author xamidev <xamidev@riseup.net>
+ * @license GNU GPL v3
+ */
+
+#ifndef IGC_H
+#define IGC_H
+
+#define NAME_MAX 256
+#define TMP_SIZE 8
+
+void parse_igc_file(FILE* fp);
+
+enum IGC_RecordType
+{
+	MANUFACTURER = 'A',
+	METADATA = 'H',
+	EXTENSION = 'I',
+	J_EXTENSION = 'J',
+	DECLARATION = 'C',
+	SATELLITES = 'F',
+	DATAPOINT = 'B',
+	DIFFERENTIAL_GPS = 'D',
+	PILOT_EVENT = 'E',
+	GEN_PURPOSE_PLACEHOLDER = 'K',
+	COMMENT = 'L',
+	SEC_KEY = 'G'
+};
+
+enum Cardinals
+{
+	NORTH = 'N',
+	SOUTH = 'S',
+	EAST = 'E',
+	WEST = 'W'
+};
+
+struct Coord
+{
+	char cardinal;
+	int deg;
+	int min;
+	int sec;
+};
+
+struct IGC_DataPoint
+{
+	// timestamp
+	int hour;
+	int minute;
+	int second;
+
+	// coordinates
+	struct Coord lat;
+	struct Coord lon;
+
+	// altitude
+	int baro_alt;
+	int gps_alt;
+};
+
+#endif

makefile

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+all:
+	gcc -Wall -Wextra igc.c
+
+clean:
+	rm a.out