* tta/C/main/manipulate_indices.c (setup_index_entries_sort_strings): use a cast to convert char *to uint8_t * and avoid a useless copy of the string. * tta/C/main/manipulate_indices.c (setup_index_entries_sort_strings): use locale variables for code clarity. * tta/C/main/unicode.c (utf8_from_string, string_from_utf8): remove comments, assume that casting is always a good way to convert between char and uint8_t.

diff --git a/ChangeLog b/ChangeLog
index 08f7f6c..140d9e7 100644
--- a/ChangeLog
+++ b/ChangeLog

@@ -1,6 +1,19 @@
 2026-05-29 Patrice Dumas  <pertusus@free.fr>
 
-	* tta/C/texi2any.c (main): oad a Perl interpreter for the options
+	* tta/C/main/manipulate_indices.c (setup_index_entries_sort_strings):
+	use a cast to convert char *to uint8_t * and avoid a useless copy
+	of the string.
+
+	* tta/C/main/manipulate_indices.c (setup_index_entries_sort_strings):
+	use locale variables for code clarity.
+
+	* tta/C/main/unicode.c (utf8_from_string, string_from_utf8): remove
+	comments, assume that casting is always a good way to convert between
+	char and uint8_t.
+
+2026-05-29 Patrice Dumas  <pertusus@free.fr>
+
+	* tta/C/texi2any.c (main): load a Perl interpreter for the options
 	triggering calling Perl functions from C, DOCUMENTLANGUAGE_COLLATION
 	and COLLATION_LANGUAGE.  Handle txi_sort_element_counts return value
 	being NULL, even though it cannot happen right now because

diff --git a/tta/C/main/manipulate_indices.c b/tta/C/main/manipulate_indices.c
index b56d12e..405ad0a 100644
--- a/tta/C/main/manipulate_indices.c
+++ b/tta/C/main/manipulate_indices.c

@@ -512,6 +512,7 @@
               for (l = 0; l < subentries_list.number; l++)
                 {
                   const ELEMENT *subentry = subentries_list.list[l];
+                  INDEX_SUBENTRY_SORT_STRING *subentry_sort_string;
 
                   entry_sort_string.subentries_number++;
 
@@ -569,23 +570,16 @@
 
                   for (k = 0; k < entry_sort_string.subentries_number; k++)
                     {
-                      uint8_t *encoded_u8;
                       ucs4_t next_char;
-                      int new_len;
-
-                      subentry_sort_string
+                      INDEX_SUBENTRY_SORT_STRING *subentry_sort_string
                         = &entry_sort_string.sort_string_subentries[k];
-             /* TODO somewhat inefficient, only need the first character */
-                      encoded_u8
-                       = utf8_from_string (subentry_sort_string->sort_string);
-                      new_len = u8_strmbtouc (&next_char, encoded_u8);
+                      int new_len = u8_strmbtouc (&next_char,
+                               (uint8_t *) subentry_sort_string->sort_string);
                       if (new_len > 0
                           && uc_is_property (next_char, UC_PROPERTY_ALPHABETIC))
                         subentry_sort_string->alpha = 1;
                       else
                         subentry_sort_string->alpha = 0;
-
-                      free (encoded_u8);
                     }
 
                   memcpy (&index_sort_strings->sort_string_entries[nr-1],

diff --git a/tta/C/main/unicode.c b/tta/C/main/unicode.c
index 6032c22..950f8b7 100644
--- a/tta/C/main/unicode.c
+++ b/tta/C/main/unicode.c

@@ -84,20 +84,12 @@
 utf8_from_string (const char *text)
 {
   return (uint8_t *) strdup (text);
-
-  /* With uniconv gnulib module this could be the following, although
-     this pulls in quite a few other gnulib module dependencies. */
-  /* TODO error checking? */
-  /* return u8_strconv_from_encoding (text, "UTF-8", iconveh_question_mark); */
 }
 
 char *
 string_from_utf8 (const uint8_t *encoded_u8)
 {
   return strdup ((char *) encoded_u8);
-  /* With uniconv gnulib module this could be the following, although
-     this pulls in quite a few other gnulib module dependencies. */
-  /* return u8_strconv_to_encoding (encoded_u8, "UTF-8", iconveh_question_mark); */
 }
 
 char *