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extern crate cards;
extern crate holdem;
extern crate pokereval;
mod functions;
use functions::{make_id, do_eval};
use cards::card::{Suit, Value, Card};
use std::collections::{BTreeMap, VecDeque};
use std::path::Path;
use std::fs::File;
use std::io::Read;
use std::io::Write;
use std::mem;
use std::slice;
pub struct LookupTable {
hr : Vec<i32>,
}
const EXPECTED_HR_LENGTH : usize = 32487834;
pub type HandRank = u16;
pub fn translate_card(card: &Card) -> usize {
let value = 4*match card.value {
Value::Two => 0,
Value::Three => 1,
Value::Four => 2,
Value::Five => 3,
Value::Six => 4,
Value::Seven => 5,
Value::Eight => 6,
Value::Nine => 7,
Value::Ten => 8,
Value::Jack => 9,
Value::Queen => 10,
Value::King => 11,
Value::Ace => 12,
};
let suit = match card.suit {
Suit::Hearts => 0,
Suit::Spades => 1,
Suit::Diamonds => 2,
Suit::Clubs => 3,
};
(suit + value) + 1
}
impl LookupTable {
pub fn generate() -> LookupTable {
let mut hr : Vec<i32> = Vec::with_capacity(EXPECTED_HR_LENGTH);
for _ in 0..EXPECTED_HR_LENGTH {
hr.push(0);
}
let mut sub_hands : BTreeMap<u64, i64> = BTreeMap::new();
let mut sub_hand_queue : VecDeque<u64> = VecDeque::new();
let mut numcards : i32 = 0;
let sub_hand : u64 = 0;
sub_hand_queue.push_back(sub_hand);
sub_hands.insert(sub_hand, 0);
while !sub_hand_queue.is_empty() {
let sub_hand = sub_hand_queue.pop_front().unwrap();
for card in 1..53 {
let a_card_more : i64 = match make_id(sub_hand as i64, card, &mut numcards) {
None => continue,
Some(x) => x
};
let ret = sub_hands.insert(a_card_more as u64, 0);
if ret == None && numcards < 6 {
sub_hand_queue.push_back(a_card_more as u64);
}
}
}
let mut position = 0;
for (_, val) in sub_hands.iter_mut() {
*val = position;
position += 1;
}
for (sub_hand, sub_hand_position) in sub_hands.iter() {
for card in 1..53 {
let max_hr = *sub_hand_position * 53 + card + 53;
let a_card_more = match make_id(*sub_hand as i64, card as i32, &mut numcards) {
None => 0,
Some(x) => x
};
if numcards == 7 {
hr[max_hr as usize] = do_eval(a_card_more);
continue;
}
if a_card_more == 0 {
continue;
}
let a_card_more_position = sub_hands.get(&(a_card_more as u64)).expect("Couldn't find hand!");
hr[max_hr as usize] = (a_card_more_position * 53 + 53) as i32;
}
if numcards == 6 || numcards == 7 {
hr[(*sub_hand_position * 53 + 53) as usize] = do_eval(*sub_hand as i64);
}
}
LookupTable{ hr: hr }
}
pub fn load(path: &Path) -> LookupTable {
let mut file = File::open(path).unwrap();
let mut buffer: Vec<u8> = Vec::new();
let result = file.read_to_end(&mut buffer).unwrap();
if (result / 4) != EXPECTED_HR_LENGTH {
panic!("The amount of read bytes differs from the expected amount");
}
let hr : Vec<i32> = unsafe {
let ptr = buffer.as_mut_ptr() as *mut i32;
mem::forget(buffer);
Vec::from_raw_parts(ptr, EXPECTED_HR_LENGTH, EXPECTED_HR_LENGTH)
};
LookupTable{ hr: hr }
}
pub fn save(&mut self, path: &Path) {
let mut file = File::create(path).unwrap();
let buffer: &[u8] = unsafe {
let ptr = self.hr.as_mut_ptr() as *mut u8;
slice::from_raw_parts(ptr, EXPECTED_HR_LENGTH*4)
};
file.write_all(buffer).unwrap();
}
pub fn eval_5cards_raw(&self, cards: [&usize; 5]) -> HandRank {
let mut a = self.hr[53+*cards[0]] as usize;
a = self.hr[a+*cards[1]] as usize;
a = self.hr[a+*cards[2]] as usize;
a = self.hr[a+*cards[3]] as usize;
a = self.hr[a+*cards[4]] as usize;
a = self.hr[a] as usize;
a as HandRank
}
pub fn eval_5cards(&self, cards: [&Card; 5]) -> HandRank {
let c1 = translate_card(cards[0]);
let c2 = translate_card(cards[1]);
let c3 = translate_card(cards[2]);
let c4 = translate_card(cards[3]);
let c5 = translate_card(cards[4]);
let mut a = self.hr[53+c1] as usize;
a = self.hr[a+c2] as usize;
a = self.hr[a+c3] as usize;
a = self.hr[a+c4] as usize;
a = self.hr[a+c5] as usize;
a = self.hr[a] as usize;
a as HandRank
}
pub fn eval_7cards(&self, cards: [&Card; 7]) -> HandRank {
let c1 = translate_card(cards[0]);
let c2 = translate_card(cards[1]);
let c3 = translate_card(cards[2]);
let c4 = translate_card(cards[3]);
let c5 = translate_card(cards[4]);
let c6 = translate_card(cards[5]);
let c7 = translate_card(cards[6]);
let mut a = self.hr[53+c1] as usize;
a = self.hr[a+c2] as usize;
a = self.hr[a+c3] as usize;
a = self.hr[a+c4] as usize;
a = self.hr[a+c5] as usize;
a = self.hr[a+c6] as usize;
a = self.hr[a+c7] as usize;
a as HandRank
}
}