stefan / combo-guesser.odin

package main import "core:mem/virtual" import "core:time" import "core:strings" import "core:unicode/utf8" import "core:math/rand" import "core:fmt" import "core:math" import "core:mem" main :: proc() { arena: virtual.Arena arena_err := virtual.arena_init_growing(&arena) assert(arena_err == .None) arena_allocator := virtual.arena_allocator(&arena) context.allocator = arena_allocator NUM_LETTERS :: 26 NUM_COMBOS :: 4 LETTERS :: "ABCDEFGHIJKLMNOPQRSTUVWXYZ" #assert(len(LETTERS) == NUM_LETTERS) total_number_of_combinations := int(math.pow_f32(NUM_LETTERS, NUM_COMBOS)) fmt.println("Max Amount of combinations:", total_number_of_combinations) runes := utf8.string_to_runes(LETTERS) used_combos, err := make(map[string]bool, total_number_of_combinations) if err != .None { return } guessing_start := time.now() guessing_attempts := 0 for len(used_combos) < total_number_of_combinations { free_all(context.temp_allocator) guessing_attempts += 1 builder := strings.builder_make(context.temp_allocator) for _ in 0..<NUM_COMBOS { pos := rand.int63_max(NUM_LETTERS) letter := runes[pos] strings.write_rune(&builder, letter) } code := strings.to_string(builder) assert(len(code) == NUM_COMBOS) ok := code in used_combos if !ok { // good path. unused means we can insert now insertable_code := strings.clone(code) used_combos[insertable_code] = true // set dummy to insert key, a hashmap needs a value. but the value is of no value to us remaining_combos := total_number_of_combinations - len(used_combos) // because printing to console is expensive, only enable for debug / informative // fmt.printfln("Code %s inserted. Amount of insertion attempts: %v . %v unoccupied Codes Remain of %v total possibilities.", insertable_code, guessing_attempts, remaining_combos, total_number_of_combinations ) guessing_attempts = 0 } } guessing_end := time.now() diff := time.diff(guessing_start, guessing_end) dur_seconds := time.duration_seconds(diff) fmt.println("Took", dur_seconds, "seconds.") }