Some of the existing syntax-check rules have apparently not been exercised
in a long time. This patch fixes one of them.


2025-05-07  Bruno Haible  <br...@clisp.org>

        Fix "make sc_prohibit_leading_TABs" failures.
        * Makefile (exclude_file_name_regexp--sc_prohibit_leading_TABs): New
        variable.
        (sc_prohibit_leading_TABs): Use it.
        * lib/crc-x86_64-pclmul.c: Untabify.
        * tests/test-crc.c: Untabify.
        * tests/test-parse-duration.sh: Remove leading tabs from here documents.

diff --git a/Makefile b/Makefile
index e0b7621df9..5fcc02510a 100644
--- a/Makefile
+++ b/Makefile
@@ -41,11 +41,13 @@ sc_prefer_ac_check_funcs_once:
 sc_prohibit_leading_TABs:
        @if test -d .git; then                                          \
          git grep -l '^ *      ' lib m4 tests                          \
-           | grep -Ev '^lib/reg|Makefile|test-update-copyright'        \
+           | grep -Ev '$(exclude_file_name_regexp--sc_prohibit_leading_TABs)' \
            | grep .                                                    \
            && { printf '*** %s\n' 'indent with spaces, not TABs;'      \
                 1>&2; exit 1; } || :                                   \
        else :; fi
+exclude_file_name_regexp--sc_prohibit_leading_TABs = \
+  
^(lib/(cdefs\.h|getopt|ieee754|malloc/|mini-|mktime\.c|qsort\.c|reg|strverscmp\.c)|m4/(largefile|std-gnu)|m4/libgcrypt|tests/from-glibc/|tests/test-update-copyright|Makefile|.*/Makefile)
 
 sc_prohibit_augmenting_PATH_via_TESTS_ENVIRONMENT:
        @if test -d .git; then                                          \
diff --git a/lib/crc-x86_64-pclmul.c b/lib/crc-x86_64-pclmul.c
index 1650843394..69d00a61c6 100644
--- a/lib/crc-x86_64-pclmul.c
+++ b/lib/crc-x86_64-pclmul.c
@@ -74,35 +74,35 @@ crc32_update_no_xor_pclmul (uint32_t crc, const void *buf, 
size_t len)
       in1 = _mm_xor_si128 (in1, xor_crc);
 
       while (bytes_remaining >= 128)
-       {
-         /* Load up second set of 512 bits */
-         in5 = _mm_loadu_si128 (data + 4);
-         in6 = _mm_loadu_si128 (data + 5);
-         in7 = _mm_loadu_si128 (data + 6);
-         in8 = _mm_loadu_si128 (data + 7);
-
-         /* We shift the high QWORD forward 544 bits and the
-            low QWORD 480 bits */
-         fold_high = _mm_clmulepi64_si128 (in1, shift544_shift480, 0x11);
-         fold_low = _mm_clmulepi64_si128 (in1, shift544_shift480, 0x00);
-         in1 = _mm_xor_si128 (in5, fold_high);
-         in1 = _mm_xor_si128 (in1, fold_low);
-         fold_high = _mm_clmulepi64_si128 (in2, shift544_shift480, 0x11);
-         fold_low = _mm_clmulepi64_si128 (in2, shift544_shift480, 0x00);
-         in2 = _mm_xor_si128 (in6, fold_high);
-         in2 = _mm_xor_si128 (in2, fold_low);
-         fold_high = _mm_clmulepi64_si128 (in3, shift544_shift480, 0x11);
-         fold_low = _mm_clmulepi64_si128 (in3, shift544_shift480, 0x00);
-         in3 = _mm_xor_si128 (in7, fold_high);
-         in3 = _mm_xor_si128 (in3, fold_low);
-         fold_high = _mm_clmulepi64_si128 (in4, shift544_shift480, 0x11);
-         fold_low = _mm_clmulepi64_si128 (in4, shift544_shift480, 0x00);
-         in4 = _mm_xor_si128 (in8, fold_high);
-         in4 = _mm_xor_si128 (in4, fold_low);
-
-         bytes_remaining -= 64;
-         data += 4;
-       }
+        {
+          /* Load up second set of 512 bits */
+          in5 = _mm_loadu_si128 (data + 4);
+          in6 = _mm_loadu_si128 (data + 5);
+          in7 = _mm_loadu_si128 (data + 6);
+          in8 = _mm_loadu_si128 (data + 7);
+
+          /* We shift the high QWORD forward 544 bits and the
+             low QWORD 480 bits */
+          fold_high = _mm_clmulepi64_si128 (in1, shift544_shift480, 0x11);
+          fold_low = _mm_clmulepi64_si128 (in1, shift544_shift480, 0x00);
+          in1 = _mm_xor_si128 (in5, fold_high);
+          in1 = _mm_xor_si128 (in1, fold_low);
+          fold_high = _mm_clmulepi64_si128 (in2, shift544_shift480, 0x11);
+          fold_low = _mm_clmulepi64_si128 (in2, shift544_shift480, 0x00);
+          in2 = _mm_xor_si128 (in6, fold_high);
+          in2 = _mm_xor_si128 (in2, fold_low);
+          fold_high = _mm_clmulepi64_si128 (in3, shift544_shift480, 0x11);
+          fold_low = _mm_clmulepi64_si128 (in3, shift544_shift480, 0x00);
+          in3 = _mm_xor_si128 (in7, fold_high);
+          in3 = _mm_xor_si128 (in3, fold_low);
+          fold_high = _mm_clmulepi64_si128 (in4, shift544_shift480, 0x11);
+          fold_low = _mm_clmulepi64_si128 (in4, shift544_shift480, 0x00);
+          in4 = _mm_xor_si128 (in8, fold_high);
+          in4 = _mm_xor_si128 (in4, fold_low);
+
+          bytes_remaining -= 64;
+          data += 4;
+        }
 
       _mm_storeu_si128 (final_buf, in1);
       _mm_storeu_si128 (final_buf + 1, in2);
@@ -158,7 +158,7 @@ crc32_update_no_xor_pclmul (uint32_t crc, const void *buf, 
size_t len)
 
       /* Read in at an offset so we get the shift for free */
       memcpy (((char *) in256) + (32 - bytes_remaining), datarw,
-             bytes_remaining);
+              bytes_remaining);
       in1 = _mm_loadu_si128 (in256);
       in2 = _mm_loadu_si128 (in256 + 1);
 
diff --git a/tests/test-crc.c b/tests/test-crc.c
index 3ae5da25c2..4a3f8f2721 100644
--- a/tests/test-crc.c
+++ b/tests/test-crc.c
@@ -105,11 +105,11 @@ main (void)
     {
       p = crc32_update_no_xor (0, randomb, MAX_ALIGNMENT + i);
       if (p != trailing_unaligned_byte_hashes[i])
-       {
-         printf ("aligned c at %lu length %lu got %lx\n", (size_t) 0,
-                 MAX_ALIGNMENT + i, (unsigned long) p);
-         return 1;
-       }
+        {
+          printf ("aligned c at %lu length %lu got %lx\n", (size_t) 0,
+                  MAX_ALIGNMENT + i, (unsigned long) p);
+          return 1;
+        }
     }
 
   /* Test for leading unaligned bytes */
@@ -118,11 +118,11 @@ main (void)
     {
       p = crc32_update_no_xor (0, randomb + i, (MAX_ALIGNMENT * 2) - i);
       if (p != leading_unaligned_byte_hashes[i])
-       {
-         printf ("aligned c at %lu length %lu got %lx\n", i,
-                 (MAX_ALIGNMENT * 2) - i, (unsigned long) p);
-         return 1;
-       }
+        {
+          printf ("aligned c at %lu length %lu got %lx\n", i,
+                  (MAX_ALIGNMENT * 2) - i, (unsigned long) p);
+          return 1;
+        }
     }
 
   /* Combined test of multiple lengths at multiple alignments */
@@ -130,14 +130,14 @@ main (void)
   for (i = 0; i < MAX_ALIGNMENT; i++)
     for (j = 0; j < MAX_ALIGNMENT; j++)
       {
-       memcpy (data + i, randomb, MAX_ALIGNMENT * 2);
-       p = crc32_update_no_xor (0, data + i, j);
-       if (p != variable_alignment_variable_length_hashes[j])
-         {
-           printf ("aligned c at %lu length %lu got %lx\n", i, j,
-                   (unsigned long) p);
-           return 1;
-         }
+        memcpy (data + i, randomb, MAX_ALIGNMENT * 2);
+        p = crc32_update_no_xor (0, data + i, j);
+        if (p != variable_alignment_variable_length_hashes[j])
+          {
+            printf ("aligned c at %lu length %lu got %lx\n", i, j,
+                    (unsigned long) p);
+            return 1;
+          }
       }
 
 
diff --git a/tests/test-parse-duration.sh b/tests/test-parse-duration.sh
index 5b4e01bb21..6188f771ac 100755
--- a/tests/test-parse-duration.sh
+++ b/tests/test-parse-duration.sh
@@ -48,15 +48,15 @@ trap 'rm -rf "${tmp}"' EXIT
 tmpf="${tmp}/tests.txt"
 
 # Tests where we expect success.
-cat > "${tmpf}" <<- _EOF_
-       1 Y 2 M 3 W 4 d 5 h 6 m 7 s
-       P 00010225 T 05:06:07
-       P 1Y2M3W4D T 5H6M7S
-       1 Y 2 M 25 D 5:6:7
-       1 Y 2 M 25 d 5h 6:7
-       1 Y 2 M 25 d 5h 6m 7
-       P 1-2-25 T 5:6:7
-       _EOF_
+cat > "${tmpf}" <<_EOF_
+1 Y 2 M 3 W 4 d 5 h 6 m 7 s
+P 00010225 T 05:06:07
+P 1Y2M3W4D T 5H6M7S
+1 Y 2 M 25 D 5:6:7
+1 Y 2 M 25 d 5h 6:7
+1 Y 2 M 25 d 5h 6m 7
+P 1-2-25 T 5:6:7
+_EOF_
 
 exec 3< "${tmpf}"
 while read line <&3
@@ -68,14 +68,14 @@ done
 exec 3>&-
 
 # Tests where we expect failure.
-cat > "${tmpf}" <<- _EOF_
-       T-00302
-       T-0:3:2
-       T-0 H 3 M 2 S
-       P+04 Y 03 M 02 D
-       P04 Y +03 M 02 D
-       P04 Y 03 M +02 D
-       _EOF_
+cat > "${tmpf}" <<_EOF_
+T-00302
+T-0:3:2
+T-0 H 3 M 2 S
+P+04 Y 03 M 02 D
+P04 Y +03 M 02 D
+P04 Y 03 M +02 D
+_EOF_
 
 fail=0
 exec 3< "${tmpf}"




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