mod: implement changes of score calculation based on original source

src/root.zig

@@ -1,5 +1,6 @@
 //! `Fuzzig` the fuzzy search library. Matching algorithm implementation is based on
-//! [ms-edit](https://github.com/microsoft/edit/blob/main/src/fuzzy.rs) MIT-Licensed.
+//! [ms-edit](https://github.com/microsoft/edit/blob/main/crates/edit/src/fuzzy.rs)
+//! MIT-Licensed.
 
 /// Result of the calculated score. The `Result` holds memory that needs to be
 /// freed once the `Result` is no longer required.
@@ -120,7 +121,7 @@ pub fn match(gpa: Allocator, target: []const u8, query: []const u8, index: usize
                 matches_sequence_len,
             );
 
-            if (score != 0 and diag_score + score >= left_score) {
+            if (score != 0 and diag_score + score >= left_score and (idx > 0 or std.mem.startsWith(u8, target_lower[target_index..], query_lower))) {
                 matches[current_idx] = matches_sequence_len + 1;
                 scores[current_idx] = diag_score + score;
             } else {
@@ -156,7 +157,8 @@ pub fn match(gpa: Allocator, target: []const u8, query: []const u8, index: usize
 /// Compute the score for a given character, while taking into account the previous character, the already matching length of a (sub-)sequence.
 fn compute_char_score(query: u8, query_lower: u8, target_prev: ?u8, target_curr: u8, target_curr_lower: u8, matches_sequence_len: usize) usize {
     var score: usize = 0;
-    if (!(query_lower == target_curr_lower or query_lower == '/' or query_lower == '\\' and target_curr_lower == '/' or target_curr_lower == '\\')) return score;
+    // Special case path separators: ignore platform differences
+    if (!(query_lower == target_curr_lower or (query_lower == '/' and target_curr_lower == '\\') or (query_lower == '/' and target_curr_lower == '\\'))) return score;
 
     score += 1;
 
@@ -165,8 +167,10 @@ fn compute_char_score(query: u8, query_lower: u8, target_prev: ?u8, target_curr:
     if (query == target_curr) score += 1;
 
     if (target_prev) |prev| {
-        score += score_separator_at_pos(prev);
+        const separator_bonus = score_separator_at_pos(prev);
-        if (target_curr != target_curr_lower and matches_sequence_len == 0) score += 2;
+        if (separator_bonus > 0)
+            score += separator_bonus
+        else if (target_curr != target_curr_lower and matches_sequence_len == 0) score += 2;
     } else {
         score += 8;
     }