Initial commit

odin/day02/day02.odin

@@ -0,0 +1,95 @@
+package day02;
+
+import "core:os";
+import "core:fmt";
+
+Move :: enum {
+    ROCK = 1,
+    PAPER = 2,
+    SCISSORS = 3,
+}
+
+rune_move : map[u8]Move
+
+init :: proc () {
+    rune_move := make(map[u8]Move)
+    rune_move['A'] = Move.ROCK
+    rune_move['X'] = Move.ROCK
+    rune_move['B'] = Move.PAPER
+    rune_move['Y'] = Move.PAPER
+    rune_move['C'] = Move.SCISSORS
+    rune_move['Z'] = Move.SCISSORS
+}
+
+determine_score :: proc(friendly: Move, enemy: Move) -> int {
+    result: int;
+    if enemy == friendly { 
+        result = 3 
+    } else if friendly == Move.ROCK && enemy == Move.PAPER {
+        result = 0
+    } else if friendly == Move.PAPER && enemy == Move.SCISSORS {
+        result = 0
+    } else if friendly == Move.SCISSORS && enemy == Move.ROCK {
+        result = 0
+    } else {
+        result = 6
+    }
+    return result + int(friendly)
+}
+
+main :: proc () {
+    init()
+    if len(os.args) < 2 {
+        fmt.printf("Usage: %s FILENAME\n", os.args[0])
+        os.exit(-1)
+    }
+    
+    fh, errno := os.open(os.args[1])
+    if errno != os.ERROR_NONE {
+        fmt.printf("Cannot open %s: %s\n", os.args[1], os.get_last_error_string())
+        os.exit(int(errno))
+    }
+    defer os.close(fh)
+
+    buffer: []u8 = make([]u8, 1);
+    defer delete(buffer);
+
+    num_read, error := os.read(fh, buffer)
+    total_score : int = 0;
+    friendly : Move
+    enemy : Move
+    chr : u8
+
+    for ; error == os.ERROR_NONE && num_read > 0; num_read, error = os.read(fh, buffer) {
+        chr = buffer[0]
+        switch chr {
+            case '\n':
+            fmt.printf("Score for this line: %d\n", determine_score(friendly, enemy))
+            total_score += determine_score(friendly, enemy)
+            case 'A':
+                enemy = .ROCK
+            case 'B':
+                enemy = .PAPER
+            case 'C':
+                enemy = .SCISSORS
+            case 'X':
+                friendly = .ROCK
+            case 'Y':
+                friendly = .PAPER
+            case 'Z':
+                friendly = .SCISSORS
+            case:
+                // this is the default
+        }
+    }
+    if chr != '\n' {
+        total_score += determine_score(friendly, enemy)
+    }
+    /// Handle potential errors
+    if error != os.ERROR_NONE {
+        fmt.printf("Error reading file: %s", os.get_last_error_string())
+        os.exit(-1)
+    }
+    delete(rune_move);
+    fmt.printf("Your score is: %d\n", total_score)
+}