From 41b7075457da32e7601a32fd5d36c1221441c580 Mon Sep 17 00:00:00 2001
From: xamidev <xamidev@riseup.net>
Date: Fri, 7 Nov 2025 17:35:30 +0100
Subject: [PATCH] Parsing datapoints

---
 .gitignore |   3 +++
 .igc.c.swp | Bin 12288 -> 0 bytes
 a.out      | Bin 16352 -> 16344 bytes
 igc.c      |  75 ++++++++++++++++++++++++++++++-----------------------
 4 files changed, 46 insertions(+), 32 deletions(-)
 create mode 100644 .gitignore
 delete mode 100644 .igc.c.swp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0b40c67
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*.out
+*.swp
+
diff --git a/.igc.c.swp b/.igc.c.swp
deleted file mode 100644
index 5c11ac86a9806303cd8a7e095513dded4a80835c..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 12288
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diff --git a/a.out b/a.out
index 92bfae385f030b4eea42a28cb737f0e97c83bb42..73c46c56734ba83159884fedf775bcc272813513 100755
GIT binary patch
delta 2411
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diff --git a/igc.c b/igc.c
index 6077f05..1ddae71 100644
--- a/igc.c
+++ b/igc.c
@@ -15,6 +15,46 @@
 #include <string.h>
 #include "igc.h"
 
+struct IGC_DataPoint* parse_datapoint(char* line)
+{
+	// There probably exists a better and/or prettier way
+	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};
+	char baro_alt[6], gps_alt[6] = {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);
+	memcpy(baro_alt, line+25, 5);
+	memcpy(gps_alt, line+30, 5);
+
+	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;
+	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_igc_file(FILE* fp)
 {
 	size_t len = 0;
@@ -25,38 +65,9 @@ void parse_igc_file(FILE* fp)
 		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);
+				struct IGC_DataPoint* dp = parse_datapoint(line);
+				// Doubly linked list of points (so theyre joined in chronological order; opens possibilities for analysis later)
+				// append_datapoint(dp);
 				break;
 			default:
 				break;