From: Pádraig Brady <P@draigBrady.com>
Date: Sat, 28 Mar 2026 09:34:33 +0000 (+0000)
Subject: cut: support no delimiter match fast path with -s
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5d339d583de4ee5906198538b225a1e0f0068c2e;p=thirdparty%2Fcoreutils.git

cut: support no delimiter match fast path with -s

* src/cut.c (cut_fields_bytesearch): Just skip the data with -s.
---

diff --git a/src/cut.c b/src/cut.c
index 2d86da9117..01343f81d2 100644
--- a/src/cut.c
+++ b/src/cut.c
@@ -1045,9 +1045,9 @@ cut_fields_bytesearch (FILE *stream)
       char *chunk = mbbuf.buffer + mbbuf.offset;
       idx_t processed = 0;
 
-      /* Fast path: no delimiter in chunk — output lines directly.  */
+      /* Fast path: no field delimiter in chunk — output or skip lines.  */
       if (field_idx == 1
-          && !suppress_non_delimited && !whitespace_delimited
+          && !whitespace_delimited
           && !field_delim_is_line_delim ()
           && !find_bytesearch_field_delim (chunk, safe))
         {
@@ -1056,17 +1056,22 @@ cut_fields_bytesearch (FILE *stream)
                                   : memrchr ((void *) chunk, line_delim, safe);
           if (last_line_delim)
             {
-              /* Flush any buffered field 1 data from a prior
-                 partial chunk that had no delimiter.  */
-              if (field_1_n_bytes > 0)
+              idx_t n = last_line_delim - chunk + 1;
+              if (! suppress_non_delimited)
                 {
-                  write_bytes (field_1_buffer, field_1_n_bytes);
-                  field_1_n_bytes = 0;
+                  /* Flush any buffered field 1 data from a prior
+                     partial chunk that had no delimiter.  */
+                  if (field_1_n_bytes > 0)
+                    {
+                      write_bytes (field_1_buffer, field_1_n_bytes);
+                      field_1_n_bytes = 0;
+                    }
+                  write_bytes (chunk, n);
+                  if (search.at_eof && chunk[n - 1] != line_delim)
+                    write_line_delim ();
                 }
-              idx_t n = last_line_delim - chunk + 1;
-              write_bytes (chunk, n);
-              if (search.at_eof && chunk[n - 1] != line_delim)
-                write_line_delim ();
+              else
+                field_1_n_bytes = 0;
               mbbuf_advance (&mbbuf, n);
               have_pending_line = false;
               if (search.at_eof)