Prefer idx_t to size_t in wordsplit

* gnulib.modules: Add ialloc.
* lib/wordsplit.c: Include ialloc.h.
(PRINTMAX): New constant.
(printflen, printfdots): New functions.
(wordsplit_dump_nodes, expvar, wordsplit_process_list): Use them.
(_wsplt_subsplit, wordsplit_string_unquote_copy):
Don’t limit lengths to INT_MAX.
(wordsplit_run): Remove.  All callers changed to use wordsplit_len.
(wordsplit_perror): Don’t limit lengths to ULONG_MAX.
* lib/wordsplit.c (wordsplit_init, alloc_space, struct wordsplit_node)
(wsnode_len, wordsplit_add_segm, coalesce_segment, wsnode_quoteremoval)
(wordsplit_finish, wordsplit_append, node_split_prefix)
(find_closing_paren, wordsplit_find_env, wsplt_assign_var)
(expvar, node_expand, expcmd, wordsplit_trimws)
(wordsplit_tildexpand, isglob, wordsplit_pathexpand)
(skip_sed_expr, skip_delim_internal, skip_delim)
(skip_delim_real, scan_qstring, scan_word)
(wordsplit_c_quoted_length, wordsplit_process_list)
(wordsplit_len, wordsplit_free_words, wordsplit_get_words):
* lib/wordsplit.h (struct wordsplit):
Prefer idx_t to size_t for indexes.
* lib/wordsplit.h: Include idx.h.

src/exclist.c

@@ -204,13 +204,12 @@ cvs_addfn (struct exclude *ex, char const *pattern, int options,
 	   MAYBE_UNUSED void *data)
 {
   struct wordsplit ws;
-  size_t i;
 
   options |= EXCLUDE_ALLOC;
   if (wordsplit (pattern, &ws,
 		 WRDSF_NOVAR | WRDSF_NOCMD | WRDSF_SQUEEZE_DELIMS))
     return;
-  for (i = 0; i < ws.ws_wordc; i++)
+  for (idx_t i = 0; i < ws.ws_wordc; i++)
     add_exclude (ex, ws.ws_wordv[i], options);
   wordsplit_free (&ws);
 }

src/system.c

@@ -526,8 +526,8 @@ run_decompress_program (void)
 	FATAL_ERROR ((0, 0, _("cannot split string '%s': %s"),
 		      p, wordsplit_strerror (&ws)));
       wsflags |= WRDSF_REUSE;
-      memmove(ws.ws_wordv, ws.ws_wordv + ws.ws_offs,
-	      sizeof(ws.ws_wordv[0])*ws.ws_wordc);
+      memmove (ws.ws_wordv, ws.ws_wordv + ws.ws_offs,
+	       ws.ws_wordc * sizeof *ws.ws_wordv);
       ws.ws_wordv[ws.ws_wordc] = (char *) "-d";
       prog = p;
       execvp (ws.ws_wordv[0], ws.ws_wordv);