refactor: replace char_u with char 4 (#19987)

* refactor: replace char_u with char

Work on https://github.com/neovim/neovim/issues/459

3 files changed, 9 insertions, 9 deletions

diff --git a/src/nvim/os/env.c b/src/nvim/os/env.c
index 274e13e3c6..c940c86675 100644
--- a/src/nvim/os/env.c
+++ b/src/nvim/os/env.c
@@ -765,12 +765,12 @@ static char *vim_version_dir(const char *vimdir)
     return NULL;
   }
   char *p = concat_fnames(vimdir, VIM_VERSION_NODOT, true);
-  if (os_isdir((char_u *)p)) {
+  if (os_isdir(p)) {
     return p;
   }
   xfree(p);
   p = concat_fnames(vimdir, RUNTIME_DIRNAME, true);
-  if (os_isdir((char_u *)p)) {
+  if (os_isdir(p)) {
     return p;
   }
   xfree(p);
@@ -976,7 +976,7 @@ char *vim_getenv(const char *name)
       assert(vim_path_end >= vim_path);
       vim_path = xstrndup(vim_path, (size_t)(vim_path_end - vim_path));
 
-      if (!os_isdir((char_u *)vim_path)) {
+      if (!os_isdir(vim_path)) {
         xfree(vim_path);
         vim_path = NULL;
       }
diff --git a/src/nvim/os/fs.c b/src/nvim/os/fs.c
index dc96c39d25..c0d5616666 100644
--- a/src/nvim/os/fs.c
+++ b/src/nvim/os/fs.c
@@ -129,10 +129,10 @@ bool os_isrealdir(const char *name)
 /// Check if the given path exists and is a directory.
 ///
 /// @return `true` if `name` is a directory.
-bool os_isdir(const char_u *name)
+bool os_isdir(const char *name)
   FUNC_ATTR_NONNULL_ALL
 {
-  int32_t mode = os_getperm((const char *)name);
+  int32_t mode = os_getperm(name);
   if (mode < 0) {
     return false;
   }
@@ -865,7 +865,7 @@ int os_file_is_writable(const char *name)
   int r;
   RUN_UV_FS_FUNC(r, uv_fs_access, name, W_OK, NULL);
   if (r == 0) {
-    return os_isdir((char_u *)name) ? 2 : 1;
+    return os_isdir(name) ? 2 : 1;
   }
   return 0;
 }
@@ -915,7 +915,7 @@ int os_mkdir_recurse(const char *const dir, int32_t mode, char **const failed_di
   char *e = curdir + dirlen;
   const char *const real_end = e;
   const char past_head_save = *past_head;
-  while (!os_isdir((char_u *)curdir)) {
+  while (!os_isdir(curdir)) {
     e = path_tail_with_sep(curdir);
     if (e <= past_head) {
       *past_head = NUL;
diff --git a/src/nvim/os/shell.c b/src/nvim/os/shell.c
index c8267ede14..461a79c37b 100644
--- a/src/nvim/os/shell.c
+++ b/src/nvim/os/shell.c
@@ -55,7 +55,7 @@ static void save_patterns(int num_pat, char **pat, int *num_file, char ***file)
     char_u *s = vim_strsave((char_u *)pat[i]);
     // Be compatible with expand_filename(): halve the number of
     // backslashes.
-    backslash_halve(s);
+    backslash_halve((char *)s);
     (*file)[i] = (char *)s;
   }
   *num_file = num_pat;
@@ -508,7 +508,7 @@ int os_expand_wildcards(int num_pat, char **pat, int *num_file, char ***file, in
     }
 
     // check if this entry should be included
-    dir = (os_isdir((char_u *)(*file)[i]));
+    dir = (os_isdir((*file)[i]));
     if ((dir && !(flags & EW_DIR)) || (!dir && !(flags & EW_FILE))) {
       continue;
     }