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//! The voice-code alphabet.
//!
//! `mMsg_sound_voice_get` folds the game's 256-entry character set down to these 34
//! values. Everything after this point — word boundaries, capitalisation, sentence
//! structure, and any letter outside `a-z0-9` — is gone.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ControlCode {
/// ♪ — plays the speaker's melody and bypasses the whole engine.
Melody, // 0x80
Space, // 0x81
Question, // 0x82
Bang, // 0x83
/// Injected by `mMsg_sound_voice_get2`; never present in the raw table.
Newline, // 0x84
/// The catch-all for punctuation and symbols.
Punct, // 0x85
/// The typing click. Only the interpunct (char 133) maps here.
Bebe, // 0x86
/// An empty `b` / `c` slot in a half-built window.
Empty, // 0xFF
/// `mMsg_sound_voice_get` returning `-1` for `CHAR_CONTROL_CODE` /
/// `CHAR_MESSAGE_TAG`. Never reaches the audio engine: `mMsg_sound_CodeVoice`
/// drops it, and the `c` lookahead folds it to [`ControlCode::Empty`].
Control, // -1
}
impl ControlCode {
/// [`ControlCode::Control`] has no code of its own; it reports `0xFF` because that is
/// what the lookahead substitutes, and it can never reach playback by any other path.
pub const fn code(self) -> u8 {
match self {
ControlCode::Melody => 0x80,
ControlCode::Space => 0x81,
ControlCode::Question => 0x82,
ControlCode::Bang => 0x83,
ControlCode::Newline => 0x84,
ControlCode::Punct => 0x85,
ControlCode::Bebe => 0x86,
ControlCode::Empty | ControlCode::Control => 0xFF,
}
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Letter {
A,
B,
C,
D,
E,
F,
G,
H,
I,
J,
K,
L,
M,
N,
O,
P,
Q,
R,
S,
T,
U,
V,
W,
X,
Y,
Z,
}
impl Letter {
/// `0x5D + (letter - 'a')`.
pub const fn code(self) -> u8 {
use Letter::*;
match self {
A => 0x5D,
B => 0x5E,
C => 0x5F,
D => 0x60,
E => 0x61,
F => 0x62,
G => 0x63,
H => 0x64,
I => 0x65,
J => 0x66,
K => 0x67,
L => 0x68,
M => 0x69,
N => 0x6A,
O => 0x6B,
P => 0x6C,
Q => 0x6D,
R => 0x6E,
S => 0x6F,
T => 0x70,
U => 0x71,
V => 0x72,
W => 0x73,
X => 0x74,
Y => 0x75,
Z => 0x76,
}
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Digit {
D0,
D1,
D2,
D3,
D4,
D5,
D6,
D7,
D8,
D9,
}
impl Digit {
/// `0x53 + digit`. This is the *voice* code, not the phoneme code — see
/// `phonemes::digit_code` for what the conversion tables turn it into.
pub const fn code(self) -> u8 {
use Digit::*;
match self {
D0 => 0x53,
D1 => 0x54,
D2 => 0x55,
D3 => 0x56,
D4 => 0x57,
D5 => 0x58,
D6 => 0x59,
D7 => 0x5A,
D8 => 0x5B,
D9 => 0x5C,
}
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum VoiceCode {
Letter(Letter),
ControlCode(ControlCode),
Digit(Digit),
}
impl VoiceCode {
pub const fn code(self) -> u8 {
match self {
VoiceCode::Letter(l) => l.code(),
VoiceCode::ControlCode(c) => c.code(),
VoiceCode::Digit(d) => d.code(),
}
}
/// `> 0x77` — the test several rules use to mean "punctuation, not a letter".
pub const fn is_punctuation(self) -> bool {
self.code() > 0x77
}
}
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