Commit 1381f9f612a5e03895615ade253411d86bce31a4 | zig

author	Andrew Kelley <andrew@ziglang.org> 2025-12-19 12:10:21-08:00
committer	Andrew Kelley <andrew@ziglang.org> 2025-12-23 22:15:11-08:00
log	1381f9f612a5e03895615ade253411d86bce31a4
tree	0311ae93ffc3646f881d0ed1a93ec0f5f9b42270
parent	ac11b8273802a3371ff2b0727d4c76489ee2f8bc

by using streamDelimiter and discardDelimiter functions that don't
depend on the buffer size being large enough

1 files changed, 4 insertions(+), 6 deletions(-)

lib/std/debug.zig+4-6

 @@ -1203,23 +1203,21 @@ fn printLineFromFile(io: Io, writer: *Writer, source_location: SourceLocation) !
     const cwd: Io.Dir = .cwd();
     var file = try cwd.openFile(io, source_location.file_name, .{});
     defer file.close(io);
-    // TODO fstat and make sure that the file has the correct size
     var buffer: [4096]u8 = undefined;
     var file_reader: File.Reader = .init(file, io, &buffer);
     var line_index: usize = 0;
-    while (try file_reader.interface.takeDelimiter('\n')) |line| {
+    const r = &file_reader.interface;
+    while (true) {
         line_index += 1;
         if (line_index == source_location.line) {
             // TODO delete hard tabs from the language
-            mem.replaceScalar(u8, line, '\t', ' ');
+            _ = try r.streamDelimiterEnding(writer, '\n');
-            try writer.writeAll(line);
-            // Make sure printing last line of file inserts extra newline.
             try writer.writeByte('\n');
             return;
         }
+        _ = try r.discardDelimiterInclusive('\n');
     }
-    return error.EndOfStream;
 }
 test printLineFromFile {