Add RomData, OptionFlags, and enums for them.

Fun error handling with automatic, fallible conversion to and from u8s
for the enums.

enemize/src/asar.rs

@@ -0,0 +1,33 @@
+use std::collections::HashMap;
+use std::fs::File;
+use std::io::{BufReader, Read};
+use std::path::Path;
+
+pub type Symbols = HashMap<String, u32>;
+
+impl Symbols {
+    pub fn load(filename: Path) -> anyhow::Result<Symbols> {
+        let file = File::open(filename)?;
+        let mut reader = BufReader::new(file);
+
+        reader.lines().filter_map(|l| l.ok().and_then(|line| {
+            let words: Vec<String> = line.split_ascii_whitespace().collect();
+            if words.len() == 2 {
+                Some((words[1], words[0]))
+            } else {
+                None
+            }
+        }))
+        .filter_map(|(symbol, mut address)| {
+            if let Some(colon_at) = address.find(':') {
+                address.remove(colon_at);
+            }
+
+            let snes_address = u32::from_str_radix(&address, 16).ok()?;
+
+            let pc_address = (snes_address & 0x7FFF) + ((addr / 2) & 0xFF8000);
+
+            Some((symbol, pc_address))
+        }).collect()
+    }
+}

enemize/src/bosses/mod.rs

@@ -0,0 +1,48 @@
+use std::marker::PhantomData;
+
+use crate::InvalidEnumError;
+
+#[derive(Debug)]
+#[repr(u8)]
+pub enum BossType {
+    Kholdstare,
+    Moldorm,
+    Mothula,
+    Vitreous,
+    Helmasaur,
+    Armos,
+    Lanmola,
+    Blind,
+    Arrghus,
+    Trinexx,
+    // Don't use these. They are only for manual settings passed in by the randomizer web app.
+    Agahnim,
+    Agahnim2,
+    Ganon,
+    NoBoss = 255,
+}
+
+impl TryFrom<u8> for BossType {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Kholdstare),
+            1 => Ok(Self::Moldorm),
+            2 => Ok(Self::Mothula),
+            3 => Ok(Self::Vitreous),
+            4 => Ok(Self::Helmasaur),
+            5 => Ok(Self::Armos),
+            6 => Ok(Self::Lanmola),
+            7 => Ok(Self::Blind),
+            8 => Ok(Self::Arrghus),
+            9 => Ok(Self::Trinexx),
+            10 => Ok(Self::Agahnim),
+            11 => Ok(Self::Agahnim2),
+            12 => Ok(Self::Ganon),
+            255 => Ok(Self::NoBoss),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+

enemize/src/constants.rs

@@ -0,0 +1,12 @@
+pub const ROM_HEADER_BANK_LOCATION: usize = 0x0B5E7;
+pub const DUNGEON_HEADER_POINTER_TABLE: usize = 0x271E2;
+pub const DUNGEON_SPRITE_POINTER_TABLE: usize = 0x4D62E;
+pub const OBJECT_DATA_POINTER_TABLE: usize = 0xF8000;
+pub const OVERWORLD_AREA_GRAPHICS_BLOCK: usize = 0x007A81;
+pub const OVERWORLD_SPRITE_POINTER_TABLE: usize = 0x04C901;
+pub const MOLDORM_EYE_COUNT_ADDRESS_VANILLA: usize = 0x0EDBB3;
+pub const MOLDORM_EYE_COUNT_ADDRESS_ENEMIZER: usize = 0x1B0102;
+pub const NEW_BOSS_GRAPHICS: usize = 0x1B0000;
+pub const RANDOM_SPRITE_GRAPHICS: usize = 0x300000;
+pub const ENEMIZER_FILE_LENGTH: usize = 0x200000;
+pub const HIDDEN_ENEMY_CHANCE_POOL: usize = 0xD7BBB;

enemize/src/lib.rs

@@ -1,10 +1,21 @@
 use std::fs::File;
+use std::marker::PhantomData;
 use std::path::{Path, PathBuf};
 
 use serde::{Deserialize, Serialize};
+use thiserror::Error;
 
+use crate::rom::RomData;
+
+pub mod bosses;
+pub mod constants;
+pub mod option_flags;
 pub mod rom;
 
+#[derive(Debug, Error)]
+#[error("Not a valid value for {0:?}")]
+pub struct InvalidEnumError<T>(PhantomData<T>);
+
 #[derive(Deserialize, Serialize)]
 pub struct Patch {
     pub address: usize,

enemize/src/option_flags.rs

@@ -0,0 +1,571 @@
+use std::collections::HashMap;
+use std::fmt;
+use std::marker::PhantomData;
+use std::path::PathBuf;
+
+use crate::bosses::BossType;
+use crate::InvalidEnumError;
+
+#[derive(Debug, Default)]
+pub struct ManualBosses {
+    pub eastern_palace: String,
+    pub desert_palace: String,
+    pub tower_of_hera: String,
+    pub agahnims_tower: String,
+    pub palace_of_darkness: String,
+    pub swamp_palace: String,
+    pub skull_woods: String,
+    pub thieves_town: String,
+    pub ice_palace: String,
+    pub misery_mire: String,
+    pub turtle_rock: String,
+    pub ganons_tower1: String,
+    pub ganons_tower2: String,
+    pub ganons_tower3: String,
+    pub ganons_tower4: String,
+    pub ganon: String,
+}
+
+#[derive(Debug)]
+pub enum RandomizeEnemiesType {
+    Basic,
+    Normal,
+    Hard,
+    Chaos,
+    Insanity,
+}
+
+impl TryFrom<u8> for RandomizeEnemiesType {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Basic),
+            1 => Ok(Self::Normal),
+            2 => Ok(Self::Hard),
+            3 => Ok(Self::Chaos),
+            4 => Ok(Self::Insanity),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum RandomizeEnemyHpType {
+    Easy,
+    Medium,
+    Hard,
+    Patty
+}
+
+impl TryFrom<u8> for RandomizeEnemyHpType {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Easy),
+            1 => Ok(Self::Medium),
+            2 => Ok(Self::Hard),
+            3 => Ok(Self::Patty),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum RandomizeBossesType {
+    Basic,
+    Normal,
+    Chaos
+}
+
+impl TryFrom<u8> for RandomizeBossesType {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Basic),
+            1 => Ok(Self::Normal),
+            2 => Ok(Self::Chaos),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum SwordType {
+    Normal
+}
+
+impl TryFrom<u8> for SwordType {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Normal),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum ShieldType {
+    Normal
+}
+
+impl TryFrom<u8> for ShieldType {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Normal),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub enum AbsorbableType {
+    Heart,
+    GreenRupee,
+    BlueRupee,
+    RedRupee,
+    Bomb1,
+    Bomb4,
+    Bomb8,
+    SmallMagic,
+    FullMagic,
+    Arrow5,
+    Arrow10,
+    Fairy,
+    Key,
+    BigKey,
+}
+
+impl TryFrom<u8> for AbsorbableType {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Heart),
+            1 => Ok(Self::GreenRupee),
+            2 => Ok(Self::BlueRupee),
+            3 => Ok(Self::Bomb1),
+            4 => Ok(Self::Bomb4),
+            5 => Ok(Self::Bomb8),
+            6 => Ok(Self::SmallMagic),
+            7 => Ok(Self::FullMagic),
+            8 => Ok(Self::Arrow5),
+            9 => Ok(Self::Arrow10),
+            10 => Ok(Self::Fairy),
+            11 => Ok(Self::Key),
+            12 => Ok(Self::BigKey),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+
+impl fmt::Display for AbsorbableType {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use AbsorbableType::*;
+
+        let description = match self {
+            Heart => "Heart",
+            GreenRupee => "Green Rupee",
+            BlueRupee => "Blue Rupee",
+            RedRupee => "Red Rupee",
+            Bomb1 => "Bomb (1)",
+            Bomb4 => "Bomb (4)",
+            Bomb8 => "Bomb (8)",
+            SmallMagic => "Small Magic",
+            FullMagic => "Full Magic",
+            Arrow5 => "Arrow (5)",
+            Arrow10 => "Arrow (10)",
+            Fairy => "Fairy",
+            Key => "Key",
+            BigKey => "Big Key",
+        };
+
+        write!(f, "{}", description)
+    }
+}
+
+#[derive(Debug)]
+pub enum HeartBeepSpeed {
+    Normal,
+    Half,
+    Quarter,
+    Off,
+}
+
+impl Default for HeartBeepSpeed {
+    fn default() -> Self {
+        HeartBeepSpeed::Normal
+    }
+}
+
+impl TryFrom<u8> for HeartBeepSpeed {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Normal),
+            1 => Ok(Self::Half),
+            2 => Ok(Self::Quarter),
+            3 => Ok(Self::Off),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum BeeLevel {
+    Level1,
+    Level2,
+    Level3,
+    Level4,
+}
+
+impl fmt::Display for BeeLevel {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use BeeLevel::*;
+
+        let description = match self {
+            Level1 => "Bees??",
+            Level2 => "Bees!",
+            Level3 => "Beeeeees!?",
+            Level4 => "Beeeeeeeeeeeeeeeeeeeees",
+        };
+
+        write!(f, "{}", description)
+    }
+}
+
+impl TryFrom<u8> for BeeLevel {
+    type Error = InvalidEnumError<Self>;
+
+    fn try_from(byte: u8) -> Result<Self, Self::Error> {
+        match byte {
+            0 => Ok(Self::Level1),
+            1 => Ok(Self::Level2),
+            2 => Ok(Self::Level3),
+            3 => Ok(Self::Level4),
+            _ => Err(InvalidEnumError(PhantomData))
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct OptionFlags {
+    pub randomize_enemies: bool,
+    pub randomize_enemies_type: RandomizeEnemiesType,
+    pub randomize_bush_enemy_chance: bool,
+
+    pub randomize_enemy_health_range: bool,
+    pub randomize_enemy_health_type: RandomizeEnemyHpType,
+
+    pub randomize_enemy_damage: bool,
+    pub allow_enemy_zero_damage: bool,
+    pub shuffle_enemy_damage_groups: bool,
+    pub enemy_damage_chaos_mode: bool,
+
+    pub easy_mode_escape: bool,
+
+    pub enemies_absorbable: bool,
+    pub absorbable_spawn_rate: u8,
+    pub absorbable_types: HashMap<AbsorbableType, bool>,
+
+    pub boss_madness: bool,
+
+    pub randomize_bosses: bool,
+    pub randomize_bosses_type: RandomizeBossesType,
+
+    pub randomize_boss_health: bool,
+    pub randomize_boss_health_min_amount: u8,
+    pub randomize_boss_health_max_amount: u8,
+
+    pub randomize_boss_damage: bool,
+    pub randomize_boss_damage_min_amount: u8,
+    pub randomize_boss_damage_max_amount: u8,
+
+    pub randomize_boss_behavior: bool,
+
+    pub randomize_dungeon_palettes: bool,
+    pub set_blackout_mode: bool,
+
+    pub randomize_overworld_palettes: bool,
+
+    pub randomize_sprite_palettes: bool,
+    pub set_advanced_sprite_palettes: bool,
+    pub puke_mode: bool,
+    pub negative_mode: bool,
+    pub grayscale_mode: bool,
+
+    pub generate_spoilers: bool,
+    pub randomize_link_sprite_palette: bool,
+    pub randomize_pots: bool,
+    pub shuffle_music: bool,
+    pub bootleg_magic: bool,
+    pub debug_mode: bool,
+    pub custom_bosses: bool,
+    pub heart_beep_speed: HeartBeepSpeed,
+    pub alternate_gfx: bool,
+    pub shield_graphics: PathBuf,
+    pub sword_graphics: PathBuf,
+    pub bee_mizer: bool,
+    pub bees_level: BeeLevel,
+    pub debug_force_enemy: bool,
+    pub debug_force_enemy_id: u8,
+    pub debug_force_boss: bool,
+    pub debug_force_boss_id: BossType,
+    pub debug_open_shutter_doors: bool,
+    pub debug_force_enemy_damage_zero: bool,
+    pub debug_show_room_id_in_rupee_counter: bool,
+    pub o_h_k_o: bool,
+    pub randomize_tile_trap_pattern: bool,
+    pub randomize_tile_trap_floor_tile: bool,
+    pub allow_killable_thief: bool,
+    pub randomize_sprite_on_hit: bool,
+    pub hero_mode: bool,
+    pub increase_brightness: bool,
+    pub mute_music_enable_msu_1: bool,
+    pub agahnim_bounce_balls: bool,
+
+    pub use_manual_bosses: bool,
+    pub manual_bosses: ManualBosses,
+}
+
+impl OptionFlags {
+    pub fn try_from_bytes(bytes: &[u8]) -> anyhow::Result<Self> {
+        let mut absorbable_types = HashMap::new();
+        absorbable_types.insert(AbsorbableType::Heart, bytes[10] != 0);
+        absorbable_types.insert(AbsorbableType::GreenRupee, bytes[11] != 0);
+        absorbable_types.insert(AbsorbableType::BlueRupee, bytes[12] != 0);
+        absorbable_types.insert(AbsorbableType::Bomb1, bytes[13] != 0);
+        absorbable_types.insert(AbsorbableType::Bomb4, bytes[14] != 0);
+        absorbable_types.insert(AbsorbableType::Bomb8, bytes[15] != 0);
+        absorbable_types.insert(AbsorbableType::SmallMagic, bytes[16] != 0);
+        absorbable_types.insert(AbsorbableType::FullMagic, bytes[17] != 0);
+        absorbable_types.insert(AbsorbableType::Arrow5, bytes[18] != 0);
+        absorbable_types.insert(AbsorbableType::Arrow10, bytes[19] != 0);
+        absorbable_types.insert(AbsorbableType::Fairy, bytes[20] != 0);
+        absorbable_types.insert(AbsorbableType::Key, bytes[21] != 0);
+        absorbable_types.insert(AbsorbableType::BigKey, bytes[22] != 0);
+
+        Ok(OptionFlags {
+            randomize_enemies: bytes[0] != 0,
+            randomize_enemies_type: bytes[1].try_into()?,
+            randomize_bush_enemy_chance: bytes[2] != 0,
+            randomize_enemy_health_range: bytes[3] != 0,
+            randomize_enemy_health_type: bytes[4].try_into()?,
+            randomize_enemy_damage: bytes[5] != 0,
+            allow_enemy_zero_damage: bytes[6] != 0,
+            easy_mode_escape: bytes[7] != 0,
+            enemies_absorbable: bytes[8] != 0,
+            absorbable_spawn_rate: bytes[9],
+            absorbable_types,
+            boss_madness: bytes[23] != 0,
+            randomize_bosses: bytes[24] != 0,
+            randomize_bosses_type: bytes[25].try_into()?,
+            randomize_boss_health: bytes[26] != 0,
+            randomize_boss_health_min_amount: bytes[27],
+            randomize_boss_health_max_amount: bytes[28],
+            randomize_boss_damage: bytes[29] != 0,
+            randomize_boss_damage_min_amount: bytes[30],
+            randomize_boss_damage_max_amount: bytes[31],
+            randomize_boss_behavior: bytes[32] != 0,
+            randomize_dungeon_palettes: bytes[33] != 0,
+            set_blackout_mode: bytes[34] != 0,
+            randomize_overworld_palettes: bytes[35] != 0,
+            randomize_sprite_palettes: bytes[36] != 0,
+            set_advanced_sprite_palettes: bytes[37] != 0,
+            puke_mode: bytes[38] != 0,
+            negative_mode: bytes[39] != 0,
+            grayscale_mode: bytes[40] != 0,
+            generate_spoilers: bytes[41] != 0,
+            randomize_link_sprite_palette: bytes[42] != 0,
+            randomize_pots: bytes[43] != 0,
+            shuffle_music: bytes[44] != 0,
+            bootleg_magic: bytes[45] != 0,
+            debug_mode: bytes[46] != 0,
+            custom_bosses: bytes[47] != 0,
+            heart_beep_speed: bytes[48].try_into()?,
+            alternate_gfx: bytes[49] != 0,
+            // Skip byte 50 (shield_graphics)
+            shuffle_enemy_damage_groups: bytes[51] != 0,
+            enemy_damage_chaos_mode: bytes[52] != 0,
+            // Skip byte 53 (sword_graphics)
+            bee_mizer: bytes[54] != 0,
+            bees_level: bytes[55].try_into()?,
+            debug_force_enemy: bytes[56] != 0,
+            debug_force_enemy_id: bytes[57],
+            debug_force_boss: bytes[58] != 0,
+            debug_force_boss_id: bytes[59].try_into()?,
+            debug_open_shutter_doors: bytes[60] != 0,
+            debug_force_enemy_damage_zero: bytes[61] != 0,
+            debug_show_room_id_in_rupee_counter: bytes[62] != 0,
+            o_h_k_o: bytes[63] != 0,
+            randomize_tile_trap_pattern: bytes[64] != 0,
+            randomize_tile_trap_floor_tile: bytes[65] != 0,
+            allow_killable_thief: bytes[66] != 0,
+            randomize_sprite_on_hit: bytes[67] != 0,
+            hero_mode: bytes[68] != 0,
+            increase_brightness: bytes[69] != 0,
+            mute_music_enable_msu_1: bytes[70] != 0,
+            agahnim_bounce_balls: bytes[71] != 0,
+            ..Default::default()
+        })
+    }
+
+    pub fn into_bytes(self) -> Vec<u8> {
+        let mut bytes = Vec::with_capacity(crate::rom::ENEMIZER_INFO_FLAGS_LENGTH);
+
+        bytes.push(self.randomize_enemies as u8);
+        bytes.push(self.randomize_enemies_type as u8);
+        bytes.push(self.randomize_bush_enemy_chance as u8);
+        bytes.push(self.randomize_enemy_health_range as u8);
+        bytes.push(self.randomize_enemy_health_type as u8);
+        bytes.push(self.randomize_enemy_damage as u8);
+        bytes.push(self.allow_enemy_zero_damage as u8);
+        bytes.push(self.easy_mode_escape as u8);
+        bytes.push(self.enemies_absorbable as u8);
+        bytes.push(self.absorbable_spawn_rate);
+
+        bytes.push(self.absorbable_types.get(&AbsorbableType::Heart).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::GreenRupee).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::BlueRupee).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::RedRupee).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::Bomb1).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::Bomb4).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::Bomb8).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::SmallMagic).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::FullMagic).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::Arrow5).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::Arrow10).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::Fairy).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::Key).copied().unwrap_or(false) as u8);
+        bytes.push(self.absorbable_types.get(&AbsorbableType::BigKey).copied().unwrap_or(false) as u8);
+
+        bytes.push(self.boss_madness as u8);
+        bytes.push(self.randomize_bosses as u8);
+        bytes.push(self.randomize_bosses_type as u8);
+        bytes.push(self.randomize_boss_health as u8);
+        bytes.push(self.randomize_boss_health_min_amount);
+        bytes.push(self.randomize_boss_health_max_amount);
+        bytes.push(self.randomize_boss_damage as u8);
+        bytes.push(self.randomize_boss_damage_min_amount);
+        bytes.push(self.randomize_boss_damage_max_amount);
+        bytes.push(self.randomize_boss_behavior as u8);
+        bytes.push(self.randomize_dungeon_palettes as u8);
+        bytes.push(self.set_blackout_mode as u8);
+        bytes.push(self.randomize_overworld_palettes as u8);
+        bytes.push(self.randomize_sprite_palettes as u8);
+        bytes.push(self.set_advanced_sprite_palettes as u8);
+        bytes.push(self.puke_mode as u8);
+        bytes.push(self.negative_mode as u8);
+        bytes.push(self.grayscale_mode as u8);
+        bytes.push(self.generate_spoilers as u8);
+        bytes.push(self.randomize_link_sprite_palette as u8);
+        bytes.push(self.randomize_pots as u8);
+        bytes.push(self.shuffle_music as u8);
+        bytes.push(self.bootleg_magic as u8);
+        bytes.push(self.debug_mode as u8);
+        bytes.push(self.custom_bosses as u8);
+        bytes.push(self.heart_beep_speed as u8);
+        bytes.push(self.alternate_gfx as u8);
+        bytes.push(0); // self.shield_graphics
+        bytes.push(self.shuffle_enemy_damage_groups as u8);
+        bytes.push(self.enemy_damage_chaos_mode as u8);
+        bytes.push(0); // self.sword_graphics
+        bytes.push(self.bee_mizer as u8);
+        bytes.push(self.bees_level as u8);
+
+        bytes.push(self.debug_force_enemy as u8);
+        bytes.push(self.debug_force_enemy_id as u8);
+        bytes.push(self.debug_force_boss as u8);
+        bytes.push(self.debug_force_boss_id as u8);
+        bytes.push(self.debug_open_shutter_doors as u8);
+        bytes.push(self.debug_force_enemy_damage_zero as u8);
+        bytes.push(self.debug_show_room_id_in_rupee_counter as u8);
+        bytes.push(self.o_h_k_o as u8);
+        bytes.push(self.randomize_tile_trap_pattern as u8);
+        bytes.push(self.randomize_tile_trap_floor_tile as u8);
+        bytes.push(self.allow_killable_thief as u8);
+        bytes.push(self.randomize_sprite_on_hit as u8);
+        bytes.push(self.hero_mode as u8);
+        bytes.push(self.increase_brightness as u8);
+        bytes.push(self.mute_music_enable_msu_1 as u8);
+        bytes.push(self.agahnim_bounce_balls as u8);
+
+        bytes
+    }
+}
+
+impl Default for OptionFlags {
+    fn default() -> Self {
+        Self {
+            randomize_enemies: true,
+            randomize_enemies_type: RandomizeEnemiesType::Chaos,
+            randomize_bush_enemy_chance: true,
+            randomize_enemy_health_range: false,
+            randomize_enemy_health_type: RandomizeEnemyHpType::Medium,
+            randomize_enemy_damage: false,
+            allow_enemy_zero_damage: false,
+            shuffle_enemy_damage_groups: false,
+            enemy_damage_chaos_mode: false,
+            easy_mode_escape: false,
+            enemies_absorbable: false,
+            absorbable_spawn_rate: 0,
+            absorbable_types: HashMap::new(),
+            boss_madness: false,
+            randomize_bosses: true,
+            randomize_bosses_type: RandomizeBossesType::Chaos,
+            randomize_boss_health: false,
+            randomize_boss_health_min_amount: 0,
+            randomize_boss_health_max_amount: 0,
+            randomize_boss_damage: false,
+            randomize_boss_damage_min_amount: 0,
+            randomize_boss_damage_max_amount: 0,
+            randomize_boss_behavior: false,
+            randomize_dungeon_palettes: true,
+            set_blackout_mode: false,
+            randomize_overworld_palettes: true,
+            randomize_sprite_palettes: true,
+            set_advanced_sprite_palettes: false,
+            puke_mode: false,
+            negative_mode: false,
+            grayscale_mode: false,
+            generate_spoilers: true,
+            randomize_link_sprite_palette: false,
+            randomize_pots: true,
+            shuffle_music: false,
+            bootleg_magic: false,
+            debug_mode: false,
+            custom_bosses: false,
+            heart_beep_speed: HeartBeepSpeed::Half,
+            alternate_gfx: false,
+            shield_graphics: ["shield_gfx", "normal.gfx"].iter().collect(),
+            sword_graphics: ["sword_gfx", "normal.gfx"].iter().collect(),
+            bee_mizer: false,
+            bees_level: BeeLevel::Level1,
+            debug_force_enemy: false,
+            debug_force_enemy_id: 0,
+            debug_force_boss: false,
+            debug_force_boss_id: BossType::Trinexx,
+            debug_open_shutter_doors: false,
+            debug_force_enemy_damage_zero: false,
+            debug_show_room_id_in_rupee_counter: false,
+            o_h_k_o: false,
+            randomize_tile_trap_pattern: false,
+            randomize_tile_trap_floor_tile: false,
+            allow_killable_thief: false,
+            randomize_sprite_on_hit: false,
+            hero_mode: false,
+            increase_brightness: false,
+            mute_music_enable_msu_1: false,
+            agahnim_bounce_balls: false,
+            use_manual_bosses: false,
+            manual_bosses: Default::default(),
+        }
+    }
+}

enemize/src/rom.rs

@@ -1,7 +1,164 @@
-const ENEMIZER_INFO_SEED_OFFSET: usize = 0;
-const ENEMIZER_INFO_SEED_LENGTH: usize = 12;
-const ENEMIZER_INFO_VERSION_OFFSET: usize = ENEMIZER_INFO_SEED_OFFSET + ENEMIZER_INFO_SEED_LENGTH;
-const ENEMIZER_INFO_VERSION_LENGTH: usize = 8;
-const ENEMIZER_INFO_FLAGS_OFFSET: usize = ENEMIZER_INFO_VERSION_OFFSET + ENEMIZER_INFO_VERSION_LENGTH;
-const ENEMIZER_INFO_FLAGS_LENGTH: usize = 0x50;
+use std::collections::BTreeMap;
+use std::iter;
+use std::ops::Range;
 
+use anyhow::bail;
+
+use crate::constants::*;
+use crate::option_flags::OptionFlags;
+use crate::Patch;
+
+pub const ENEMIZER_INFO_SEED_OFFSET: usize = 0;
+pub const ENEMIZER_INFO_SEED_LENGTH: usize = 12;
+pub const ENEMIZER_INFO_VERSION_OFFSET: usize = ENEMIZER_INFO_SEED_OFFSET + ENEMIZER_INFO_SEED_LENGTH;
+pub const ENEMIZER_INFO_VERSION_LENGTH: usize = 8;
+pub const ENEMIZER_INFO_FLAGS_OFFSET: usize =
+    ENEMIZER_INFO_VERSION_OFFSET + ENEMIZER_INFO_VERSION_LENGTH;
+pub const ENEMIZER_INFO_FLAGS_LENGTH: usize = 0x50;
+
+pub const RANDOMIZER_HIDDEN_ENEMIES_FLAG: usize = 0x00;
+pub const CLOSE_BLIND_DOOR_FLAG: usize = 0x01;
+pub const MOLDORM_EYES_FLAG: usize = 0x02;
+pub const RANDOM_SPRITE_FLAG: usize = 0x03;
+pub const AGAHNIM_BOUNCE_BALLS_FLAG: usize = 0x04;
+pub const ENABLE_MIMIC_OVERRIDE_FLAG: usize = 0x05;
+pub const ENABLE_TERRORPIN_AI_FIX_FLAG: usize = 0x06;
+pub const CHECKSUM_COMPLIMENT_ADDRESS: usize = 0x7FDC;
+pub const CHECKSUM_ADDRESS: usize = 0x7FDE;
+pub const RANDOMIZER_MODE_FLAG: usize = 0x180032;
+
+pub struct RomData {
+    pub enemizer_info_table_base_address: usize,
+    pub enemizer_option_flags_base_address: usize,
+    spoiler: String,
+    rom_data: Vec<u8>,
+    patch_data: BTreeMap<usize, u8>,
+    seed: i32,
+}
+
+impl RomData {
+    pub fn spoiler(&self) -> &str {
+        self.spoiler.as_str()
+    }
+
+    pub fn generate_patch(&self) -> Vec<Patch> {
+        let mut patches = vec![];
+
+        for (&addr, &byte) in self.patch_data.iter() {
+            match patches.last_mut().filter(|p: &&mut Patch| p.address + 1 == addr) {
+                None => patches.push(Patch { address: addr, patch_data: vec![byte] }),
+                Some(patch) => patch.patch_data.push(byte)
+            }
+        }
+
+        patches
+    }
+
+    fn set_rom_bytes(&mut self, bytes: &[u8], range: Range<usize>) {
+        self.rom_data.splice(range, bytes.into_iter().map(|&b| b));
+    }
+
+    fn set_patch_bytes(&mut self, range: Range<usize>) {
+        let slice = &self.rom_data[range.clone()];
+        self.patch_data.extend(iter::zip(range, slice.into_iter().map(|&b| b)));
+    }
+
+    pub fn is_enemizer(&self) -> bool {
+        self.rom_data.len() == ENEMIZER_FILE_LENGTH
+             && self.rom_data[self.enemizer_info_table_base_address + ENEMIZER_INFO_SEED_OFFSET] == b'E'
+             && self.rom_data[self.enemizer_info_table_base_address + ENEMIZER_INFO_SEED_OFFSET + 1] == b'N'
+    }
+
+    fn assert_rom_length(&self) {
+        assert!(self.rom_data.len() >= ENEMIZER_FILE_LENGTH, "You need to expand the rom before you can use Enemizer features.");
+    }
+
+    pub fn get_enemizer_seed(&self) -> i32 {
+        self.seed
+    }
+
+    pub fn derive_enemizer_seed(&mut self) -> anyhow::Result<i32> {
+        if self.seed < 0 && self.is_enemizer() {
+            let seed_start = self.enemizer_info_table_base_address + ENEMIZER_INFO_SEED_OFFSET;
+            let seed_end = seed_start + ENEMIZER_INFO_SEED_LENGTH;
+            let seed_bytes = &self.rom_data[seed_start..seed_end];
+            let seed_str = &std::str::from_utf8(seed_bytes)?.trim_end_matches('\0')[2..];
+
+            self.seed = i32::from_str_radix(seed_str, 10)?;
+        }
+
+        Ok(self.seed)
+    }
+
+    pub fn set_enemizer_seed(&mut self, seed: i32) {
+        self.assert_rom_length();
+
+        let seed_str = format!("EN{:<10}", seed);
+        let bytes = seed_str.as_bytes().to_owned();
+
+        let seed_start = self.enemizer_info_table_base_address + ENEMIZER_INFO_SEED_OFFSET;
+        let seed_end = seed_start + ENEMIZER_INFO_SEED_LENGTH;
+        self.seed = seed;
+
+        self.set_rom_bytes(&bytes, seed_start..seed_end);
+        self.set_patch_bytes(seed_start..seed_end);
+    }
+
+    pub fn get_enemizer_version(&self) -> anyhow::Result<&str> {
+        if self.is_enemizer() {
+            let version_start = self.enemizer_info_table_base_address + ENEMIZER_INFO_VERSION_OFFSET;
+            let version_end = version_start + ENEMIZER_INFO_VERSION_LENGTH;
+            Ok(std::str::from_utf8(&self.rom_data[version_start..version_end])?)
+        } else {
+            bail!("Not Enemizer Rom")
+        }
+    }
+
+    pub fn set_enemizer_version(&mut self, version: String) {
+        self.assert_rom_length();
+
+        let mut bytes = version.into_bytes();
+        bytes.resize(ENEMIZER_INFO_VERSION_LENGTH, 0);
+
+        let version_start = self.enemizer_info_table_base_address + ENEMIZER_INFO_VERSION_OFFSET;
+        let version_end = version_start + ENEMIZER_INFO_VERSION_LENGTH;
+        self.set_rom_bytes(&bytes, version_start..version_end);
+        self.set_patch_bytes(version_start..version_end)
+    }
+
+    pub fn set_info_flags(&mut self, flags: OptionFlags) -> anyhow::Result<()>{
+        let bytes = flags.into_bytes();
+        if bytes.len() > 0x100 - ENEMIZER_INFO_FLAGS_OFFSET {
+            bail!("Option flags is too long to fit in the space allocated. Need to move data/code in asm file.");
+        }
+
+        let flags_start = self.enemizer_info_table_base_address + ENEMIZER_INFO_FLAGS_OFFSET;
+        let flags_end = flags_start + bytes.len();
+        self.set_rom_bytes(&bytes, flags_start..flags_end);
+        self.set_patch_bytes(flags_start..flags_end);
+
+        Ok(())
+    }
+
+    pub fn get_info_flags(&self) -> Option<OptionFlags> {
+        if self.is_enemizer() {
+            let flags_start = self.enemizer_info_table_base_address + ENEMIZER_INFO_FLAGS_OFFSET;
+            let flags_end = flags_start + ENEMIZER_INFO_FLAGS_LENGTH;
+            OptionFlags::try_from_bytes(&self.rom_data[flags_start..flags_end]).ok()
+        } else {
+            None
+        }
+    }
+
+    pub fn patch_bytes(&mut self, address: usize, patch_data: Vec<u8>) {
+        self.rom_data
+            .splice(address..(address + patch_data.len()), patch_data);
+    }
+
+    pub fn patch_data(&mut self, patch: Patch) {
+        self.set_rom_bytes(
+            &patch.patch_data,
+            patch.address..(patch.address + patch.patch_data.len()),
+        );
+    }
+}