source code migrating from gitlab

odin-lang/Makefile

@@ -0,0 +1,5 @@
+all:
+	odin build . -out:main
+
+clean:
+	rm main

odin-lang/main.odin

@@ -0,0 +1,83 @@
+package main
+
+import "core:fmt"
+import "core:os"
+import "core:strconv"
+import "core:strings"
+import "core:unicode/utf8"
+
+main :: proc() {
+
+	if len(os.args) < 2 {
+		fmt.println("Error: file required")
+		os.exit(-1)
+	}
+	filename := os.args[1]
+
+	sum, ok := getSum(filename)
+	if !ok {
+		os.exit(-1)
+	}
+	fmt.println(sum)
+
+}
+
+
+getSum :: proc(filename: string) -> (int, bool) {
+	data, err := os.read_entire_file(filename, context.allocator)
+	if err != nil {
+		fmt.println("error opening file", err)
+		return -1, false
+	}
+	defer delete(data, context.allocator)
+	sum := 0
+
+	iter := string(data)
+
+	for line in strings.split_lines_iterator(&iter) {
+		first := getFirst(line)
+		last := getLast(line)
+
+		// convert to rune array
+		digits := []rune{first, last}
+		// convert rune array to string first?
+		str := utf8.runes_to_string(digits, context.allocator)
+		// covert string to int..
+		val, ok := strconv.parse_int(str)
+		if !ok {
+			fmt.println("error converting to int")
+			continue
+		}
+		sum += val
+
+	}
+
+	return sum, true
+}
+
+getFirst :: proc(line: string) -> rune {
+	first: rune
+
+	for ch in line {
+		if ch >= '0' && ch <= '9' {
+			first = ch
+			break
+		}
+	}
+
+	return first
+}
+
+getLast :: proc(line: string) -> rune {
+	last: rune
+
+	length := len(line) - 1
+	for i := length; i >= 0; i -= 1 {
+		if line[i] >= '0' && line[i] <= '9' {
+			last = rune(line[i])
+			break
+		}
+
+	}
+	return last
+}