62376dd4a1
This branch predates CI on `main`. `cargo fmt --all` only; no behaviour. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
59 lines
2.2 KiB
Rust
59 lines
2.2 KiB
Rust
//! Are `GP_DIALOG` entries 0/1 and 2/3 a LANGUAGE PAIR or a DUPLICATE?
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//!
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//! They are the only two adjacent pairs in that archive with identical element
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//! sets; every other adjacent pair is two unrelated dialogs. Left open as
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//! "untested" — identical element names are equally consistent with a language
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//! pair (same layout, different glyphs baked into the textures) and with a
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//! byte-for-byte duplicate.
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//!
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//! The bytes decide it: identical entries are a duplicate; entries that share
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//! every element name but differ in payload are a language pair.
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//!
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//! CONTROL: entries 10/11, known to be two DIFFERENT dialogs (stage 10 vs stage
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//! 02), must come out as differing — and by a lot. A comparator that cannot
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//! separate two unrelated dialogs cannot judge two similar ones.
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//!
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//! cargo run -p sylpheed-formats --example dialog_pair_identity
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use std::path::PathBuf;
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use sylpheed_formats::pak::PakArchive;
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fn cmp(ar: &PakArchive, a: usize, b: usize, what: &str) {
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let (Ok(x), Ok(y)) = (ar.read(&ar.entries()[a]), ar.read(&ar.entries()[b])) else {
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println!("{what}: unreadable");
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return;
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};
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let same_len = x.len() == y.len();
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let n = x.len().min(y.len());
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let diff = (0..n).filter(|&i| x[i] != y[i]).count();
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let first = (0..n).find(|&i| x[i] != y[i]);
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println!("{what}");
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println!(
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" sizes {} / {} ({})",
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x.len(),
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y.len(),
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if same_len { "equal" } else { "DIFFER" }
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);
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println!(
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" differing bytes over the common prefix: {diff} / {n} ({:.2}%)",
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100.0 * diff as f64 / n as f64
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);
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match first {
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None if same_len => println!(" => BYTE-IDENTICAL — a duplicate"),
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None => println!(" => one is a prefix of the other"),
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Some(o) => println!(" => first difference at offset 0x{o:X}"),
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}
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}
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fn main() {
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let root = PathBuf::from(std::env::var("SYLPHEED_DISC").expect("SYLPHEED_DISC"));
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let ar = PakArchive::open(root.join("dat/GP_DIALOG.pak")).expect("GP_DIALOG");
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cmp(
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&ar,
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10,
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11,
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"CONTROL: entries 10/11 — known two different dialogs",
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);
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cmp(&ar, 0, 1, "entries 0/1");
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cmp(&ar, 2, 3, "entries 2/3 — the DIFFICULTY build");
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}
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