functions used for reading an writing from allready existing files

1 files changed, 60 insertions, 0 deletions

diff --git a/csv.go b/csv.go
new file mode 100644
index 0000000..e9d60cb
--- /dev/null
+++ b/csv.go
@@ -0,0 +1,60 @@
+// collection of functions reading allready existing stars from a .csv
+
+package main
+
+import (
+	"encoding/csv"
+	"fmt"
+	"os"
+	"strconv"
+)
+
+// open_stars_csv opens the file defined using the path argument, reads its content and returns
+// an array of arrays containing the coordinates of the stars
+func open_stars_csv(path string) ([][]string) {
+
+	// open the file in the given path
+	b, err := os.Open(path)
+
+	// handle errors
+	if err != nil {
+		fmt.Println("open_stars_csv panic")
+		panic(err)
+	}
+
+	// close the file after reading it's content
+	defer b.Close()
+
+	// open the file using a csv reader and read it's content
+	lines, err := csv.NewReader(b).ReadAll()
+
+	// handle errors
+	if err != nil {
+		fmt.Println("read_csv panic")
+		panic(err)
+	}
+
+	// return the content
+	return lines
+}
+
+// add_csv_to_stars_arr adds the given stars to the given stars_arr
+// the stars that should be added are expected to be stored in a[][]string
+func add_csv_to_stars_arr(lines [][]string, stars_arr []star) {
+	for _, line := range lines {
+
+		// convert the coordinates to float64
+		x, _ := strconv.ParseFloat(line[0], 64)
+		y, _ := strconv.ParseFloat(line[1], 64)
+
+		// create a temporary star for storing the information
+		temp_star := star{
+			coord{x, y},
+			force{0, 0},
+			1000000,
+		}
+
+		// add the temporary star to the stars_arr
+		stars_arr = append(stars_arr, temp_star)
+	}
+}
\ No newline at end of file