Add Rust port of ddate

.gitignore

@@ -2,3 +2,7 @@ build
 ddate.exe
 ddate.obj
 .vscode/
+
+# Rust
+target/
+Cargo.lock

Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "ddate"
+version = "0.1.0"
+edition = "2021"
+description = "Discordian date converter"
+license = "CC0-1.0"
+
+[features]
+default = ["old_immediate_fmt", "kill_bob"]
+old_immediate_fmt = []
+us_format = []
+kill_bob = []
+praise_bob = []
+
+[profile.release]
+opt-level = "z"     # Optimize for size
+lto = true          # Link-time optimization
+codegen-units = 1   # Better optimization
+panic = "abort"     # No unwinding
+strip = true        # Strip symbols

Makefile

@@ -0,0 +1,24 @@
+.PHONY: all release debug clean install
+
+CARGO = cargo
+UPX = upx
+PREFIX ?= /usr/local
+
+all: release
+
+release:
+	$(CARGO) build --release
+	$(UPX) --best target/release/ddate
+
+debug:
+	$(CARGO) build
+
+clean:
+	$(CARGO) clean
+
+install: release
+	install -Dm755 target/release/ddate $(PREFIX)/bin/ddate
+
+# Build without UPX compression
+release-uncompressed:
+	$(CARGO) build --release

src/constants.rs

@@ -0,0 +1,94 @@
+pub const DAY_LONG: [&str; 5] = [
+    "Sweetmorn",
+    "Boomtime",
+    "Pungenday",
+    "Prickle-Prickle",
+    "Setting Orange",
+];
+
+pub const DAY_SHORT: [&str; 5] = ["SM", "BT", "PD", "PP", "SO"];
+
+pub const SEASON_LONG: [&str; 5] = [
+    "Chaos",
+    "Discord",
+    "Confusion",
+    "Bureaucracy",
+    "The Aftermath",
+];
+
+pub const SEASON_SHORT: [&str; 5] = ["Chs", "Dsc", "Cfn", "Bcy", "Afm"];
+
+pub const HOLYDAYS: [[&str; 2]; 5] = [
+    ["Mungday", "Chaoflux"],
+    ["Mojoday", "Discoflux"],
+    ["Syaday", "Confuflux"],
+    ["Zaraday", "Bureflux"],
+    ["Maladay", "Afflux"],
+];
+
+/// Static exclamations array matching C's exact order
+#[cfg(all(not(feature = "praise_bob"), target_os = "linux"))]
+pub const EXCLAMATIONS: &[&str] = &[
+    "Hail Eris!", "All Hail Discordia!", "Kallisti!", "Fnord.", "Or not.",
+    "Wibble.", "Pzat!", "P'tang!", "Frink!",
+    "Grudnuk demand sustenance!", "Keep the Lasagna flying!", "You are what you see.",
+    "Or is it?", "This statement is false.", "Lies and slander, sire!", "Hee hee hee!",
+    "Hail Eris, Hack Linux!", "",
+];
+
+#[cfg(all(not(feature = "praise_bob"), target_os = "macos"))]
+pub const EXCLAMATIONS: &[&str] = &[
+    "Hail Eris!", "All Hail Discordia!", "Kallisti!", "Fnord.", "Or not.",
+    "Wibble.", "Pzat!", "P'tang!", "Frink!",
+    "Grudnuk demand sustenance!", "Keep the Lasagna flying!", "You are what you see.",
+    "Or is it?", "This statement is false.", "Lies and slander, sire!", "Hee hee hee!",
+    "This Fruit is not the True Fruit of Discord.", "",
+];
+
+#[cfg(all(not(feature = "praise_bob"), not(target_os = "linux"), not(target_os = "macos")))]
+pub const EXCLAMATIONS: &[&str] = &[
+    "Hail Eris!", "All Hail Discordia!", "Kallisti!", "Fnord.", "Or not.",
+    "Wibble.", "Pzat!", "P'tang!", "Frink!",
+    "Grudnuk demand sustenance!", "Keep the Lasagna flying!", "You are what you see.",
+    "Or is it?", "This statement is false.", "Lies and slander, sire!", "Hee hee hee!",
+    "",
+];
+
+#[cfg(all(feature = "praise_bob", target_os = "linux"))]
+pub const EXCLAMATIONS: &[&str] = &[
+    "Hail Eris!", "All Hail Discordia!", "Kallisti!", "Fnord.", "Or not.",
+    "Wibble.", "Pzat!", "P'tang!", "Frink!",
+    "Slack!", "Praise \"Bob\"!", "Or kill me.",
+    "Grudnuk demand sustenance!", "Keep the Lasagna flying!", "You are what you see.",
+    "Or is it?", "This statement is false.", "Lies and slander, sire!", "Hee hee hee!",
+    "Hail Eris, Hack Linux!", "",
+];
+
+#[cfg(all(feature = "praise_bob", target_os = "macos"))]
+pub const EXCLAMATIONS: &[&str] = &[
+    "Hail Eris!", "All Hail Discordia!", "Kallisti!", "Fnord.", "Or not.",
+    "Wibble.", "Pzat!", "P'tang!", "Frink!",
+    "Slack!", "Praise \"Bob\"!", "Or kill me.",
+    "Grudnuk demand sustenance!", "Keep the Lasagna flying!", "You are what you see.",
+    "Or is it?", "This statement is false.", "Lies and slander, sire!", "Hee hee hee!",
+    "This Fruit is not the True Fruit of Discord.", "",
+];
+
+#[cfg(all(feature = "praise_bob", not(target_os = "linux"), not(target_os = "macos")))]
+pub const EXCLAMATIONS: &[&str] = &[
+    "Hail Eris!", "All Hail Discordia!", "Kallisti!", "Fnord.", "Or not.",
+    "Wibble.", "Pzat!", "P'tang!", "Frink!",
+    "Slack!", "Praise \"Bob\"!", "Or kill me.",
+    "Grudnuk demand sustenance!", "Keep the Lasagna flying!", "You are what you see.",
+    "Or is it?", "This statement is false.", "Lies and slander, sire!", "Hee hee hee!",
+    "",
+];
+
+#[cfg(feature = "old_immediate_fmt")]
+pub const DEFAULT_IMMEDIATE_FMT: &str =
+    "Today is %{%A, the %e day of %B%} in the YOLD %Y%N%nCelebrate %H";
+
+#[cfg(not(feature = "old_immediate_fmt"))]
+pub const DEFAULT_IMMEDIATE_FMT: &str = "%{%A, %B %d%}, %Y YOLD";
+
+pub const DEFAULT_FMT: &str = "%{%A, %B %d%}, %Y YOLD";

src/disc_time.rs

@@ -0,0 +1,135 @@
+use crate::constants::HOLYDAYS;
+
+/// Days in each Gregorian month (non-leap year)
+const CALENDAR: [i32; 12] = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
+
+/// Represents a Discordian date
+#[derive(Debug, Clone, Copy, Default)]
+pub struct DiscTime {
+    pub season: i32, // 0-4, or -1 for invalid
+    pub day: i32,    // 0-72, or -1 for St. Tib's Day
+    pub yday: i32,   // 0-365 (day of Discordian year)
+    pub year: i32,   // Discordian year (Gregorian + 1166)
+}
+
+impl DiscTime {
+    /// Check if this is St. Tib's Day
+    pub fn is_tibs_day(&self) -> bool {
+        self.day == -1
+    }
+
+    /// Get the holyday name if applicable
+    pub fn holyday_name(&self) -> Option<&'static str> {
+        if self.day == 4 {
+            Some(HOLYDAYS[self.season as usize][0])
+        } else if self.day == 49 {
+            Some(HOLYDAYS[self.season as usize][1])
+        } else {
+            None
+        }
+    }
+}
+
+/// Convert day-of-year and year (as tm_yday, tm_year from localtime) to DiscTime
+///
+/// nday: days since January 1 (0-365)
+/// nyear: years since 1900
+pub fn convert(nday: i32, nyear: i32) -> DiscTime {
+    // nyear is years since 1900, add 3066 to get Discordian year
+    // 1900 + 1166 = 3066
+    let year = nyear + 3066;
+    let mut day = nday;
+
+    // Handle leap year St. Tib's Day
+    // Discordian leap years have year % 4 == 2 (because 1166 % 4 == 2)
+    if year % 4 == 2 {
+        if day == 59 {
+            // February 29 (0-indexed day 59) is St. Tib's Day
+            day = -1;
+        } else if day > 59 {
+            // Days after St. Tib's Day are shifted back by one
+            day -= 1;
+        }
+    }
+
+    let yday = day;
+
+    // Calculate season (each season has 73 days)
+    let (season, day) = if day >= 0 {
+        (day / 73, day % 73)
+    } else {
+        (0, day) // St. Tib's Day
+    };
+
+    DiscTime {
+        season,
+        day,
+        yday,
+        year,
+    }
+}
+
+/// Convert Gregorian date to DiscTime
+///
+/// Arguments order depends on us_format feature:
+/// - us_format disabled (default): arg1=day, arg2=month
+/// - us_format enabled: arg1=month, arg2=day
+pub fn makeday(arg1: i32, arg2: i32, iyear: i32) -> DiscTime {
+    #[cfg(feature = "us_format")]
+    let (imonth, iday) = (arg1, arg2);
+    #[cfg(not(feature = "us_format"))]
+    let (iday, imonth) = (arg1, arg2);
+
+    // Validate month (1-12) and year (not 0)
+    if !(1..=12).contains(&imonth) || iyear == 0 {
+        return DiscTime {
+            season: -1,
+            ..Default::default()
+        };
+    }
+
+    // Validate day
+    let month_idx = (imonth - 1) as usize;
+    let max_day = CALENDAR[month_idx];
+
+    if iday < 1 || iday > max_day {
+        // Special case: Feb 29 on leap year
+        let is_leap = iyear % 4 == 0 && (iyear % 100 != 0 || iyear % 400 == 0);
+        if !(imonth == 2 && iday == 29 && is_leap) {
+            return DiscTime {
+                season: -1,
+                ..Default::default()
+            };
+        }
+    }
+
+    // Calculate Discordian year
+    // Note: Gregorian year 0 doesn't exist, so add 1 for negative years
+    let year = iyear + 1166 + if iyear < 0 { 1 } else { 0 };
+
+    // Calculate day of year (0-indexed)
+    let days_past: i32 = CALENDAR.iter().take(month_idx).sum();
+    let mut day = days_past + iday - 1;
+
+    // Handle St. Tib's Day
+    // Discordian leap years have year % 4 == 2
+    if year % 4 == 2 && day == 59 && iday == 29 {
+        day = -1;
+    }
+
+    let yday = day;
+
+    // Calculate season (each season has 73 days)
+    let (season, day) = if day >= 0 {
+        (day / 73, day % 73)
+    } else {
+        (0, day) // St. Tib's Day
+    };
+
+    DiscTime {
+        season,
+        day,
+        yday,
+        year,
+    }
+}