patch 9.1.1122: too many strlen() calls in findfile.c

Problem:  too many strlen() calls in findfile.c
Solution: refactor findfile.c and remove calls to strlen()
          (John Marriott)

closes: #16595

Signed-off-by: John Marriott <basilisk@internode.on.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/proto/findfile.pro

@@ -1,5 +1,5 @@
 /* findfile.c */
-void *vim_findfile_init(char_u *path, char_u *filename, char_u *stopdirs, int level, int free_visited, int find_what, void *search_ctx_arg, int tagfile, char_u *rel_fname);
+void *vim_findfile_init(char_u *path, char_u *filename, size_t filenamelen, char_u *stopdirs, int level, int free_visited, int find_what, void *search_ctx_arg, int tagfile, char_u *rel_fname);
 char_u *vim_findfile_stopdir(char_u *buf);
 void vim_findfile_cleanup(void *ctx);
 char_u *vim_findfile(void *search_ctx_arg);
@@ -14,6 +14,6 @@ char_u *find_file_name_in_path(char_u *ptr, int len, int options, long count, ch
 int vim_ispathlistsep(int c);
 void uniquefy_paths(garray_T *gap, char_u *pattern, char_u *path_option);
 int expand_in_path(garray_T *gap, char_u *pattern, int flags);
-void simplify_filename(char_u *filename);
+size_t simplify_filename(char_u *filename);
 void f_simplify(typval_T *argvars, typval_T *rettv);
 /* vim: set ft=c : */

src/tag.c

@@ -3421,6 +3421,7 @@ get_tagfname(
 	    *filename++ = NUL;
 
 	    tnp->tn_search_ctx = vim_findfile_init(buf, filename,
+		    STRLEN(filename),
 		    r_ptr, 100,
 		    FALSE,	   // don't free visited list
 		    FINDFILE_FILE, // we search for a file

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1122,
 /**/
     1121,
 /**/