Remove alternate diff algorithms, only keep Patience

Cargo.lock

@@ -110,9 +110,9 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "ahash"
-version = "0.8.9"
+version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d713b3834d76b85304d4d525563c1276e2e30dc97cc67bfb4585a4a29fc2c89f"
+checksum = "8b79b82693f705137f8fb9b37871d99e4f9a7df12b917eed79c3d3954830a60b"
 dependencies = [
  "cfg-if",
  "getrandom",
@@ -1576,9 +1576,9 @@ dependencies = [
 
 [[package]]
 name = "error-code"
-version = "3.1.0"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26a147e1a6641a55d994b3e4e9fa4d9b180c8d652c09b363af8c9bf1b8e04139"
+checksum = "a0474425d51df81997e2f90a21591180b38eccf27292d755f3e30750225c175b"
 
 [[package]]
 name = "event-listener"
@@ -2101,7 +2101,7 @@ dependencies = [
  "presser",
  "thiserror",
  "winapi",
- "windows 0.51.1",
+ "windows 0.52.0",
 ]
 
 [[package]]
@@ -3004,7 +3004,6 @@ dependencies = [
  "serde_json",
  "serde_yaml",
  "similar",
- "twox-hash",
 ]
 
 [[package]]
@@ -3456,9 +3455,9 @@ checksum = "42a9830a0e1b9fb145ebb365b8bc4ccd75f290f98c0247deafbbe2c75cefb544"
 
 [[package]]
 name = "rayon"
-version = "1.8.1"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa7237101a77a10773db45d62004a272517633fbcc3df19d96455ede1122e051"
+checksum = "e4963ed1bc86e4f3ee217022bd855b297cef07fb9eac5dfa1f788b220b49b3bd"
 dependencies = [
  "either",
  "rayon-core",
@@ -4180,9 +4179,9 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.10.0"
+version = "3.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a365e8cd18e44762ef95d87f284f4b5cd04107fec2ff3052bd6a3e6069669e67"
+checksum = "85b77fafb263dd9d05cbeac119526425676db3784113aa9295c88498cbf8bff1"
 dependencies = [
  "cfg-if",
  "fastrand 2.0.1",
@@ -4507,17 +4506,6 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17f77d76d837a7830fe1d4f12b7b4ba4192c1888001c7164257e4bc6d21d96b4"
 
-[[package]]
-name = "twox-hash"
-version = "1.6.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
-dependencies = [
- "cfg-if",
- "rand",
- "static_assertions",
-]
-
 [[package]]
 name = "type-map"
 version = "0.5.0"
@@ -5056,21 +5044,21 @@ dependencies = [
 
 [[package]]
 name = "windows"
-version = "0.51.1"
+version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca229916c5ee38c2f2bc1e9d8f04df975b4bd93f9955dc69fabb5d91270045c9"
+checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
 dependencies = [
  "windows-core",
- "windows-targets 0.48.5",
+ "windows-targets 0.52.3",
 ]
 
 [[package]]
 name = "windows-core"
-version = "0.51.1"
+version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1f8cf84f35d2db49a46868f947758c7a1138116f7fac3bc844f43ade1292e64"
+checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
 dependencies = [
- "windows-targets 0.48.5",
+ "windows-targets 0.52.3",
 ]
 
 [[package]]

objdiff-cli/src/cmd/report.rs

@@ -108,7 +108,7 @@ pub fn run(args: Args) -> Result<()> {
                 )
             })
             .collect::<Result<Vec<Option<ReportUnit>>>>()?;
-        report.units = units.into_iter().flatten().collect::<Vec<ReportUnit>>();
+        report.units = units.into_iter().flatten().collect();
     }
     for unit in &report.units {
         report.fuzzy_match_percent += unit.match_percent * unit.total_size as f32;
@@ -198,10 +198,14 @@ fn report_object(
                     continue;
                 }
             }
-            let match_percent = symbol.match_percent.unwrap_or(if object.complete == Some(true) {
+            let match_percent = symbol.match_percent.unwrap_or_else(|| {
+                // Support cases where we don't have a target object,
+                // assume complete means 100% match
+                if object.complete == Some(true) {
                     100.0
                 } else {
                     0.0
+                }
             });
             unit.match_percent += match_percent * symbol.size as f32;
             unit.total_size += symbol.size;

objdiff-core/Cargo.toml

@@ -33,8 +33,7 @@ object = { version = "0.32.2", features = ["read_core", "std", "elf"], default-f
 ppc750cl = { git = "https://github.com/encounter/ppc750cl", rev = "4a2bbbc6f84dcb76255ab6f3595a8d4a0ce96618", optional = true }
 rabbitizer = { version = "1.8.1", optional = true }
 serde = { version = "1", features = ["derive"] }
-similar = "2.4.0"
+similar = { version = "2.4.0", default-features = false }
-twox-hash = "1.6.3"
 
 # config
 globset = { version = "0.4.14", features = ["serde1"] }

objdiff-core/src/diff/code.rs

@@ -8,10 +8,7 @@ use anyhow::Result;
 use similar::{capture_diff_slices_deadline, Algorithm};
 
 use crate::{
-    diff::{
+    diff::{DiffObjConfig, ProcessCodeResult},
-        editops::{editops_find, LevEditType},
-        DiffAlg, DiffObjConfig, ProcessCodeResult,
-    },
     obj,
     obj::{
         ObjArchitecture, ObjInfo, ObjInsArg, ObjInsArgDiff, ObjInsBranchFrom, ObjInsBranchTo,
@@ -101,45 +98,7 @@ pub fn diff_code(
 
     let mut left_diff = Vec::<ObjInsDiff>::new();
     let mut right_diff = Vec::<ObjInsDiff>::new();
-    match config.code_alg {
+    diff_instructions(&mut left_diff, &mut right_diff, &left_out, &right_out)?;
-        DiffAlg::Levenshtein => {
-            diff_instructions_lev(
-                &mut left_diff,
-                &mut right_diff,
-                left_symbol,
-                right_symbol,
-                &left_out,
-                &right_out,
-            )?;
-        }
-        DiffAlg::Lcs => {
-            diff_instructions_similar(
-                Algorithm::Lcs,
-                &mut left_diff,
-                &mut right_diff,
-                &left_out,
-                &right_out,
-            )?;
-        }
-        DiffAlg::Myers => {
-            diff_instructions_similar(
-                Algorithm::Myers,
-                &mut left_diff,
-                &mut right_diff,
-                &left_out,
-                &right_out,
-            )?;
-        }
-        DiffAlg::Patience => {
-            diff_instructions_similar(
-                Algorithm::Patience,
-                &mut left_diff,
-                &mut right_diff,
-                &left_out,
-                &right_out,
-            )?;
-        }
-    }
 
     resolve_branches(&mut left_diff);
     resolve_branches(&mut right_diff);
@@ -168,15 +127,19 @@ pub fn diff_code(
     Ok(())
 }
 
-fn diff_instructions_similar(
+fn diff_instructions(
-    alg: Algorithm,
     left_diff: &mut Vec<ObjInsDiff>,
     right_diff: &mut Vec<ObjInsDiff>,
     left_code: &ProcessCodeResult,
     right_code: &ProcessCodeResult,
 ) -> Result<()> {
     let deadline = Instant::now() + Duration::from_secs(5);
-    let ops = capture_diff_slices_deadline(alg, &left_code.ops, &right_code.ops, Some(deadline));
+    let ops = capture_diff_slices_deadline(
+        Algorithm::Patience,
+        &left_code.ops,
+        &right_code.ops,
+        Some(deadline),
+    );
     if ops.is_empty() {
         left_diff.extend(
             left_code
@@ -217,75 +180,6 @@ fn diff_instructions_similar(
     Ok(())
 }
 
-fn diff_instructions_lev(
-    left_diff: &mut Vec<ObjInsDiff>,
-    right_diff: &mut Vec<ObjInsDiff>,
-    left_symbol: &ObjSymbol,
-    right_symbol: &ObjSymbol,
-    left_code: &ProcessCodeResult,
-    right_code: &ProcessCodeResult,
-) -> Result<()> {
-    let edit_ops = editops_find(&left_code.ops, &right_code.ops);
-
-    let mut op_iter = edit_ops.iter();
-    let mut left_iter = left_code.insts.iter();
-    let mut right_iter = right_code.insts.iter();
-    let mut cur_op = op_iter.next();
-    let mut cur_left = left_iter.next();
-    let mut cur_right = right_iter.next();
-    while let Some(op) = cur_op {
-        let left_addr = op.first_start as u32 * 4;
-        let right_addr = op.second_start as u32 * 4;
-        while let (Some(left), Some(right)) = (cur_left, cur_right) {
-            if (left.address - left_symbol.address as u32) < left_addr {
-                left_diff.push(ObjInsDiff { ins: Some(left.clone()), ..ObjInsDiff::default() });
-                right_diff.push(ObjInsDiff { ins: Some(right.clone()), ..ObjInsDiff::default() });
-            } else {
-                break;
-            }
-            cur_left = left_iter.next();
-            cur_right = right_iter.next();
-        }
-        if let (Some(left), Some(right)) = (cur_left, cur_right) {
-            debug_assert_eq!(left.address - left_symbol.address as u32, left_addr);
-            debug_assert_eq!(right.address - right_symbol.address as u32, right_addr);
-            match op.op_type {
-                LevEditType::Replace => {
-                    left_diff.push(ObjInsDiff { ins: Some(left.clone()), ..ObjInsDiff::default() });
-                    right_diff
-                        .push(ObjInsDiff { ins: Some(right.clone()), ..ObjInsDiff::default() });
-                    cur_left = left_iter.next();
-                    cur_right = right_iter.next();
-                }
-                LevEditType::Insert => {
-                    left_diff.push(ObjInsDiff::default());
-                    right_diff
-                        .push(ObjInsDiff { ins: Some(right.clone()), ..ObjInsDiff::default() });
-                    cur_right = right_iter.next();
-                }
-                LevEditType::Delete => {
-                    left_diff.push(ObjInsDiff { ins: Some(left.clone()), ..ObjInsDiff::default() });
-                    right_diff.push(ObjInsDiff::default());
-                    cur_left = left_iter.next();
-                }
-            }
-        } else {
-            break;
-        }
-        cur_op = op_iter.next();
-    }
-
-    // Finalize
-    while cur_left.is_some() || cur_right.is_some() {
-        left_diff.push(ObjInsDiff { ins: cur_left.cloned(), ..ObjInsDiff::default() });
-        right_diff.push(ObjInsDiff { ins: cur_right.cloned(), ..ObjInsDiff::default() });
-        cur_left = left_iter.next();
-        cur_right = right_iter.next();
-    }
-
-    Ok(())
-}
-
 fn resolve_branches(vec: &mut [ObjInsDiff]) {
     let mut branch_idx = 0usize;
     // Map addresses to indices

objdiff-core/src/diff/data.rs

@@ -1,28 +1,12 @@
 use std::{
     cmp::{max, min, Ordering},
-    mem::take,
     time::{Duration, Instant},
 };
 
-use anyhow::{ensure, Result};
+use anyhow::Result;
 use similar::{capture_diff_slices_deadline, Algorithm};
 
-use crate::{
+use crate::obj::{ObjDataDiff, ObjDataDiffKind, ObjSection, ObjSymbol};
-    diff::{
-        editops::{editops_find, LevEditType},
-        DiffAlg,
-    },
-    obj::{ObjDataDiff, ObjDataDiffKind, ObjSection, ObjSymbol},
-};
-
-pub fn diff_data(alg: DiffAlg, left: &mut ObjSection, right: &mut ObjSection) -> Result<()> {
-    match alg {
-        DiffAlg::Levenshtein => diff_data_lev(left, right),
-        DiffAlg::Lcs => diff_data_similar(Algorithm::Lcs, left, right),
-        DiffAlg::Myers => diff_data_similar(Algorithm::Myers, left, right),
-        DiffAlg::Patience => diff_data_similar(Algorithm::Patience, left, right),
-    }
-}
 
 pub fn diff_bss_symbols(
     left_symbols: &mut [ObjSymbol],
@@ -40,67 +24,10 @@ pub fn diff_bss_symbols(
     Ok(())
 }
 
-// WIP diff-by-symbol
+pub fn diff_data(left: &mut ObjSection, right: &mut ObjSection) -> Result<()> {
-#[allow(dead_code)]
-pub fn diff_data_symbols(left: &mut ObjSection, right: &mut ObjSection) -> Result<()> {
-    let mut left_ops = Vec::<u32>::with_capacity(left.symbols.len());
-    let mut right_ops = Vec::<u32>::with_capacity(right.symbols.len());
-    for left_symbol in &left.symbols {
-        let data = &left.data
-            [left_symbol.address as usize..(left_symbol.address + left_symbol.size) as usize];
-        let hash = twox_hash::xxh3::hash64(data);
-        left_ops.push(hash as u32);
-    }
-    for symbol in &right.symbols {
-        let data = &right.data[symbol.address as usize..(symbol.address + symbol.size) as usize];
-        let hash = twox_hash::xxh3::hash64(data);
-        right_ops.push(hash as u32);
-    }
-
-    let edit_ops = editops_find(&left_ops, &right_ops);
-    if edit_ops.is_empty() && !left.data.is_empty() {
-        let mut left_iter = left.symbols.iter_mut();
-        let mut right_iter = right.symbols.iter_mut();
-        loop {
-            let (left_symbol, right_symbol) = match (left_iter.next(), right_iter.next()) {
-                (Some(l), Some(r)) => (l, r),
-                (None, None) => break,
-                _ => return Err(anyhow::Error::msg("L/R mismatch in diff_data_symbols")),
-            };
-            let left_data = &left.data
-                [left_symbol.address as usize..(left_symbol.address + left_symbol.size) as usize];
-            let right_data = &right.data[right_symbol.address as usize
-                ..(right_symbol.address + right_symbol.size) as usize];
-
-            left.data_diff.push(ObjDataDiff {
-                data: left_data.to_vec(),
-                kind: ObjDataDiffKind::None,
-                len: left_symbol.size as usize,
-                symbol: left_symbol.name.clone(),
-            });
-            right.data_diff.push(ObjDataDiff {
-                data: right_data.to_vec(),
-                kind: ObjDataDiffKind::None,
-                len: right_symbol.size as usize,
-                symbol: right_symbol.name.clone(),
-            });
-            left_symbol.diff_symbol = Some(right_symbol.name.clone());
-            left_symbol.match_percent = Some(100.0);
-            right_symbol.diff_symbol = Some(left_symbol.name.clone());
-            right_symbol.match_percent = Some(100.0);
-        }
-        return Ok(());
-    }
-    Ok(())
-}
-
-pub fn diff_data_similar(
-    alg: Algorithm,
-    left: &mut ObjSection,
-    right: &mut ObjSection,
-) -> Result<()> {
     let deadline = Instant::now() + Duration::from_secs(5);
-    let ops = capture_diff_slices_deadline(alg, &left.data, &right.data, Some(deadline));
+    let ops =
+        capture_diff_slices_deadline(Algorithm::Patience, &left.data, &right.data, Some(deadline));
 
     let mut left_diff = Vec::<ObjDataDiff>::new();
     let mut right_diff = Vec::<ObjDataDiff>::new();
@@ -175,226 +102,6 @@ pub fn diff_data_similar(
     Ok(())
 }
 
-pub fn diff_data_lev(left: &mut ObjSection, right: &mut ObjSection) -> Result<()> {
-    let matrix_size = (left.data.len() as u64).saturating_mul(right.data.len() as u64);
-    ensure!(
-        matrix_size < 1_000_000_000,
-        "Data section {} too large for Levenshtein diff ({} * {} = {})",
-        left.name,
-        left.data.len(),
-        right.data.len(),
-        matrix_size
-    );
-
-    let edit_ops = editops_find(&left.data, &right.data);
-    if edit_ops.is_empty() && !left.data.is_empty() {
-        left.data_diff = vec![ObjDataDiff {
-            data: left.data.clone(),
-            kind: ObjDataDiffKind::None,
-            len: left.data.len(),
-            symbol: String::new(),
-        }];
-        right.data_diff = vec![ObjDataDiff {
-            data: right.data.clone(),
-            kind: ObjDataDiffKind::None,
-            len: right.data.len(),
-            symbol: String::new(),
-        }];
-        return Ok(());
-    }
-
-    let mut left_diff = Vec::<ObjDataDiff>::new();
-    let mut right_diff = Vec::<ObjDataDiff>::new();
-    let mut left_cur = 0usize;
-    let mut right_cur = 0usize;
-    let mut cur_op = LevEditType::Replace;
-    let mut cur_left_data = Vec::<u8>::new();
-    let mut cur_right_data = Vec::<u8>::new();
-    for op in edit_ops {
-        if cur_op != op.op_type || left_cur < op.first_start || right_cur < op.second_start {
-            match cur_op {
-                LevEditType::Replace => {
-                    let left_data = take(&mut cur_left_data);
-                    let right_data = take(&mut cur_right_data);
-                    let left_data_len = left_data.len();
-                    let right_data_len = right_data.len();
-                    left_diff.push(ObjDataDiff {
-                        data: left_data,
-                        kind: ObjDataDiffKind::Replace,
-                        len: left_data_len,
-                        symbol: String::new(),
-                    });
-                    right_diff.push(ObjDataDiff {
-                        data: right_data,
-                        kind: ObjDataDiffKind::Replace,
-                        len: right_data_len,
-                        symbol: String::new(),
-                    });
-                }
-                LevEditType::Insert => {
-                    let right_data = take(&mut cur_right_data);
-                    let right_data_len = right_data.len();
-                    left_diff.push(ObjDataDiff {
-                        data: vec![],
-                        kind: ObjDataDiffKind::Insert,
-                        len: right_data_len,
-                        symbol: String::new(),
-                    });
-                    right_diff.push(ObjDataDiff {
-                        data: right_data,
-                        kind: ObjDataDiffKind::Insert,
-                        len: right_data_len,
-                        symbol: String::new(),
-                    });
-                }
-                LevEditType::Delete => {
-                    let left_data = take(&mut cur_left_data);
-                    let left_data_len = left_data.len();
-                    left_diff.push(ObjDataDiff {
-                        data: left_data,
-                        kind: ObjDataDiffKind::Delete,
-                        len: left_data_len,
-                        symbol: String::new(),
-                    });
-                    right_diff.push(ObjDataDiff {
-                        data: vec![],
-                        kind: ObjDataDiffKind::Delete,
-                        len: left_data_len,
-                        symbol: String::new(),
-                    });
-                }
-            }
-        }
-        if left_cur < op.first_start {
-            left_diff.push(ObjDataDiff {
-                data: left.data[left_cur..op.first_start].to_vec(),
-                kind: ObjDataDiffKind::None,
-                len: op.first_start - left_cur,
-                symbol: String::new(),
-            });
-            left_cur = op.first_start;
-        }
-        if right_cur < op.second_start {
-            right_diff.push(ObjDataDiff {
-                data: right.data[right_cur..op.second_start].to_vec(),
-                kind: ObjDataDiffKind::None,
-                len: op.second_start - right_cur,
-                symbol: String::new(),
-            });
-            right_cur = op.second_start;
-        }
-        match op.op_type {
-            LevEditType::Replace => {
-                cur_left_data.push(left.data[left_cur]);
-                cur_right_data.push(right.data[right_cur]);
-                left_cur += 1;
-                right_cur += 1;
-            }
-            LevEditType::Insert => {
-                cur_right_data.push(right.data[right_cur]);
-                right_cur += 1;
-            }
-            LevEditType::Delete => {
-                cur_left_data.push(left.data[left_cur]);
-                left_cur += 1;
-            }
-        }
-        cur_op = op.op_type;
-    }
-    // if left_cur < left.data.len() {
-    //     let len = left.data.len() - left_cur;
-    //     left_diff.push(ObjDataDiff {
-    //         data: left.data[left_cur..].to_vec(),
-    //         kind: ObjDataDiffKind::Delete,
-    //         len,
-    //     });
-    //     right_diff.push(ObjDataDiff { data: vec![], kind: ObjDataDiffKind::Delete, len });
-    // } else if right_cur < right.data.len() {
-    //     let len = right.data.len() - right_cur;
-    //     left_diff.push(ObjDataDiff { data: vec![], kind: ObjDataDiffKind::Insert, len });
-    //     right_diff.push(ObjDataDiff {
-    //         data: right.data[right_cur..].to_vec(),
-    //         kind: ObjDataDiffKind::Insert,
-    //         len,
-    //     });
-    // }
-
-    // TODO: merge with above
-    match cur_op {
-        LevEditType::Replace => {
-            let left_data = take(&mut cur_left_data);
-            let right_data = take(&mut cur_right_data);
-            let left_data_len = left_data.len();
-            let right_data_len = right_data.len();
-            left_diff.push(ObjDataDiff {
-                data: left_data,
-                kind: ObjDataDiffKind::Replace,
-                len: left_data_len,
-                symbol: String::new(),
-            });
-            right_diff.push(ObjDataDiff {
-                data: right_data,
-                kind: ObjDataDiffKind::Replace,
-                len: right_data_len,
-                symbol: String::new(),
-            });
-        }
-        LevEditType::Insert => {
-            let right_data = take(&mut cur_right_data);
-            let right_data_len = right_data.len();
-            left_diff.push(ObjDataDiff {
-                data: vec![],
-                kind: ObjDataDiffKind::Insert,
-                len: right_data_len,
-                symbol: String::new(),
-            });
-            right_diff.push(ObjDataDiff {
-                data: right_data,
-                kind: ObjDataDiffKind::Insert,
-                len: right_data_len,
-                symbol: String::new(),
-            });
-        }
-        LevEditType::Delete => {
-            let left_data = take(&mut cur_left_data);
-            let left_data_len = left_data.len();
-            left_diff.push(ObjDataDiff {
-                data: left_data,
-                kind: ObjDataDiffKind::Delete,
-                len: left_data_len,
-                symbol: String::new(),
-            });
-            right_diff.push(ObjDataDiff {
-                data: vec![],
-                kind: ObjDataDiffKind::Delete,
-                len: left_data_len,
-                symbol: String::new(),
-            });
-        }
-    }
-
-    if left_cur < left.data.len() {
-        left_diff.push(ObjDataDiff {
-            data: left.data[left_cur..].to_vec(),
-            kind: ObjDataDiffKind::None,
-            len: left.data.len() - left_cur,
-            symbol: String::new(),
-        });
-    }
-    if right_cur < right.data.len() {
-        right_diff.push(ObjDataDiff {
-            data: right.data[right_cur..].to_vec(),
-            kind: ObjDataDiffKind::None,
-            len: right.data.len() - right_cur,
-            symbol: String::new(),
-        });
-    }
-
-    left.data_diff = left_diff;
-    right.data_diff = right_diff;
-    Ok(())
-}
-
 pub fn no_diff_data(section: &mut ObjSection) {
     section.data_diff = vec![ObjDataDiff {
         data: section.data.clone(),

objdiff-core/src/diff/editops.rs

@@ -1,162 +0,0 @@
-/// Adapted from https://crates.io/crates/rapidfuzz
-// Copyright 2020 maxbachmann
-//
-// Permission is hereby granted, free of charge, to any
-// person obtaining a copy of this software and associated
-// documentation files (the "Software"), to deal in the
-// Software without restriction, including without
-// limitation the rights to use, copy, modify, merge,
-// publish, distribute, sublicense, and/or sell copies of
-// the Software, and to permit persons to whom the Software
-// is furnished to do so, subject to the following
-// conditions:
-//
-// The above copyright notice and this permission notice
-// shall be included in all copies or substantial portions
-// of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
-// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
-// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
-// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
-// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
-// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-#[derive(Debug, PartialEq, Eq, Copy, Clone)]
-pub enum LevEditType {
-    Replace,
-    Insert,
-    Delete,
-}
-
-#[derive(Debug, PartialEq, Eq)]
-pub struct LevEditOp {
-    pub op_type: LevEditType, /* editing operation type */
-    pub first_start: usize,   /* source block position */
-    pub second_start: usize,  /* destination position */
-}
-
-pub fn editops_find<T>(query: &[T], choice: &[T]) -> Vec<LevEditOp>
-where T: PartialEq {
-    let Affix { prefix_len, suffix_len } = Affix::find(query, choice);
-
-    let first_string = &query[prefix_len..query.len() - suffix_len];
-    let second_string = &choice[prefix_len..choice.len() - suffix_len];
-
-    let matrix_columns = first_string.len() + 1;
-    let matrix_rows = second_string.len() + 1;
-
-    // TODO maybe use an actual matrix for readability
-    let mut cache_matrix: Vec<usize> = vec![0; matrix_rows * matrix_columns];
-    for (i, elem) in cache_matrix.iter_mut().enumerate().take(matrix_rows) {
-        *elem = i;
-    }
-    for i in 1..matrix_columns {
-        cache_matrix[matrix_rows * i] = i;
-    }
-
-    for (i, char1) in first_string.iter().enumerate() {
-        let mut prev = i * matrix_rows;
-        let current = prev + matrix_rows;
-        let mut x = i + 1;
-        for (p, char2p) in second_string.iter().enumerate() {
-            let mut c3 = cache_matrix[prev] + (char1 != char2p) as usize;
-            prev += 1;
-            x += 1;
-            if x >= c3 {
-                x = c3;
-            }
-            c3 = cache_matrix[prev] + 1;
-            if x > c3 {
-                x = c3;
-            }
-            cache_matrix[current + 1 + p] = x;
-        }
-    }
-    editops_from_cost_matrix(matrix_columns, matrix_rows, prefix_len, cache_matrix)
-}
-
-fn editops_from_cost_matrix(
-    len1: usize,
-    len2: usize,
-    prefix_len: usize,
-    cache_matrix: Vec<usize>,
-) -> Vec<LevEditOp> {
-    let mut ops = Vec::with_capacity(cache_matrix[len1 * len2 - 1]);
-    let mut dir = 0;
-    let mut i = len1 - 1;
-    let mut j = len2 - 1;
-    let mut p = len1 * len2 - 1;
-
-    //TODO this is still pretty ugly
-    while i > 0 || j > 0 {
-        let current_value = cache_matrix[p];
-
-        // More than one operation can be possible at a time. We use `dir` to
-        // decide when ambiguous.
-        let is_insert = j > 0 && current_value == cache_matrix[p - 1] + 1;
-        let is_delete = i > 0 && current_value == cache_matrix[p - len2] + 1;
-        let is_replace = i > 0 && j > 0 && current_value == cache_matrix[p - len2 - 1] + 1;
-
-        let (op_type, new_dir) = match (dir, is_insert, is_delete, is_replace) {
-            (_, false, false, false) => (None, 0),
-            (-1, true, _, _) => (Some(LevEditType::Insert), -1),
-            (1, _, true, _) => (Some(LevEditType::Delete), 1),
-            (_, _, _, true) => (Some(LevEditType::Replace), 0),
-            (0, true, _, _) => (Some(LevEditType::Insert), -1),
-            (0, _, true, _) => (Some(LevEditType::Delete), 1),
-            _ => panic!("something went terribly wrong"),
-        };
-
-        match new_dir {
-            -1 => {
-                j -= 1;
-                p -= 1;
-            }
-            1 => {
-                i -= 1;
-                p -= len2;
-            }
-            0 => {
-                i -= 1;
-                j -= 1;
-                p -= len2 + 1;
-            }
-            _ => panic!("something went terribly wrong"),
-        };
-        dir = new_dir;
-
-        if let Some(op_type) = op_type {
-            ops.insert(0, LevEditOp {
-                op_type,
-                first_start: i + prefix_len,
-                second_start: j + prefix_len,
-            });
-        }
-    }
-
-    ops
-}
-
-pub struct Affix {
-    pub prefix_len: usize,
-    pub suffix_len: usize,
-}
-
-impl Affix {
-    pub fn find<T>(s1: &[T], s2: &[T]) -> Affix
-    where T: PartialEq {
-        let prefix_len = s1.iter().zip(s2.iter()).take_while(|t| t.0 == t.1).count();
-        let suffix_len = s1[prefix_len..]
-            .iter()
-            .rev()
-            .zip(s2[prefix_len..].iter().rev())
-            .take_while(|t| t.0 == t.1)
-            .count();
-
-        Affix { prefix_len, suffix_len }
-    }
-}

objdiff-core/src/diff/mod.rs

@@ -1,10 +1,8 @@
 pub mod code;
 pub mod data;
 pub mod display;
-pub mod editops;
 
 use anyhow::Result;
-use serde::{Deserialize, Serialize};
 
 use crate::{
     diff::{
@@ -14,19 +12,8 @@ use crate::{
     obj::{ObjInfo, ObjIns, ObjSectionKind},
 };
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
-pub enum DiffAlg {
-    #[default]
-    Patience,
-    Levenshtein,
-    Myers,
-    Lcs,
-}
-
 #[derive(Debug, Clone, Default, Eq, PartialEq)]
 pub struct DiffObjConfig {
-    pub code_alg: DiffAlg,
-    pub data_alg: DiffAlg,
     pub relax_reloc_diffs: bool,
 }
 
@@ -80,7 +67,7 @@ pub fn diff_objs(
                 .and_then(|obj| obj.sections.iter_mut().find(|s| s.name == left_section.name))
             {
                 if left_section.kind == ObjSectionKind::Data {
-                    diff_data(config.data_alg, left_section, right_section)?;
+                    diff_data(left_section, right_section)?;
                 } else if left_section.kind == ObjSectionKind::Bss {
                     diff_bss_symbols(&mut left_section.symbols, &mut right_section.symbols)?;
                 }

objdiff-gui/src/app.rs

@@ -106,10 +106,6 @@ pub struct AppConfig {
     #[serde(default)]
     pub recent_projects: Vec<PathBuf>,
     #[serde(default)]
-    pub code_alg: DiffAlg,
-    #[serde(default)]
-    pub data_alg: DiffAlg,
-    #[serde(default)]
     pub relax_reloc_diffs: bool,
 
     #[serde(skip)]
@@ -148,8 +144,6 @@ impl Default for AppConfig {
             auto_update_check: true,
             watch_patterns: DEFAULT_WATCH_PATTERNS.iter().map(|s| Glob::new(s).unwrap()).collect(),
             recent_projects: vec![],
-            code_alg: Default::default(),
-            data_alg: Default::default(),
             relax_reloc_diffs: false,
             objects: vec![],
             object_nodes: vec![],

objdiff-gui/src/jobs/objdiff.rs

@@ -57,8 +57,6 @@ pub struct ObjDiffConfig {
     pub build_base: bool,
     pub build_target: bool,
     pub selected_obj: Option<ObjectConfig>,
-    pub code_alg: DiffAlg,
-    pub data_alg: DiffAlg,
     pub relax_reloc_diffs: bool,
 }
 
@@ -69,8 +67,6 @@ impl ObjDiffConfig {
             build_base: config.build_base,
             build_target: config.build_target,
             selected_obj: config.selected_obj.clone(),
-            code_alg: config.code_alg,
-            data_alg: config.data_alg,
             relax_reloc_diffs: config.relax_reloc_diffs,
         }
     }
@@ -253,11 +249,7 @@ fn run_build(
     };
 
     update_status(context, "Performing diff".to_string(), 4, total, &cancel)?;
-    let diff_config = DiffObjConfig {
+    let diff_config = DiffObjConfig { relax_reloc_diffs: config.relax_reloc_diffs };
-        code_alg: config.code_alg,
-        data_alg: config.data_alg,
-        relax_reloc_diffs: config.relax_reloc_diffs,
-    };
     diff_objs(&diff_config, first_obj.as_mut(), second_obj.as_mut())?;
 
     update_status(context, "Complete".to_string(), total, total, &cancel)?;

objdiff-gui/src/views/config.rs

@@ -14,10 +14,7 @@ use egui::{
     SelectableLabel, TextFormat, Widget, WidgetText,
 };
 use globset::Glob;
-use objdiff_core::{
+use objdiff_core::config::{ProjectObject, DEFAULT_WATCH_PATTERNS};
-    config::{ProjectObject, DEFAULT_WATCH_PATTERNS},
-    diff::DiffAlg,
-};
 use self_update::cargo_crate_version;
 
 use crate::{
@@ -853,58 +850,3 @@ pub fn diff_options_window(
         diff_options_ui(ui, &mut config_guard, appearance);
     });
 }
-
-fn diff_options_ui(ui: &mut egui::Ui, config: &mut AppConfig, appearance: &Appearance) {
-    let mut job = LayoutJob::default();
-    job.append(
-        "Current default: ",
-        0.0,
-        TextFormat::simple(appearance.ui_font.clone(), appearance.text_color),
-    );
-    job.append(
-        diff_alg_to_string(DiffAlg::default()),
-        0.0,
-        TextFormat::simple(appearance.ui_font.clone(), appearance.emphasized_text_color),
-    );
-    ui.label(job);
-    let mut job = LayoutJob::default();
-    job.append(
-        "Previous default: ",
-        0.0,
-        TextFormat::simple(appearance.ui_font.clone(), appearance.text_color),
-    );
-    job.append(
-        "Levenshtein",
-        0.0,
-        TextFormat::simple(appearance.ui_font.clone(), appearance.emphasized_text_color),
-    );
-    ui.label(job);
-    ui.label("Please provide feedback!");
-    if diff_alg_ui(ui, "Code diff algorithm", &mut config.code_alg) {
-        config.queue_reload = true;
-    }
-    if diff_alg_ui(ui, "Data diff algorithm", &mut config.data_alg) {
-        config.queue_reload = true;
-    }
-}
-
-fn diff_alg_ui(ui: &mut egui::Ui, label: impl Into<WidgetText>, alg: &mut DiffAlg) -> bool {
-    let response = egui::ComboBox::from_label(label)
-        .selected_text(diff_alg_to_string(*alg))
-        .show_ui(ui, |ui| {
-            ui.selectable_value(alg, DiffAlg::Patience, "Patience").changed()
-                | ui.selectable_value(alg, DiffAlg::Levenshtein, "Levenshtein").changed()
-                | ui.selectable_value(alg, DiffAlg::Myers, "Myers").changed()
-                | ui.selectable_value(alg, DiffAlg::Lcs, "LCS").changed()
-        });
-    response.inner.unwrap_or(false)
-}
-
-const fn diff_alg_to_string(alg: DiffAlg) -> &'static str {
-    match alg {
-        DiffAlg::Patience => "Patience",
-        DiffAlg::Levenshtein => "Levenshtein",
-        DiffAlg::Lcs => "LCS",
-        DiffAlg::Myers => "Myers",
-    }
-}