Remove char_u: concat_fnames()

src/nvim/if_cscope.c

@@ -2054,7 +2054,7 @@ static char *cs_resolve_file(int i, char *name)
   } else if (csdir != NULL && csinfo[i].fname != NULL && *csdir != NUL) {
     /* Check for csdir to be non empty to avoid empty path concatenated to
      * cscope output. */
-    fullname = (char *)concat_fnames(csdir, (char_u *)name, TRUE);
+    fullname = concat_fnames((char *)csdir, name, TRUE);
   } else {
     fullname = xstrdup(name);
   }

src/nvim/main.c

@@ -1282,7 +1282,7 @@ scripterror:
           && !os_isdir(alist_name(&GARGLIST[0]))) {
         char_u      *r;
 
-        r = concat_fnames(p, path_tail(alist_name(&GARGLIST[0])), TRUE);
+        r = (char_u *)concat_fnames((char *)p, (char *)path_tail(alist_name(&GARGLIST[0])), TRUE);
         xfree(p);
         p = r;
       }

src/nvim/memline.c

@@ -1332,11 +1332,11 @@ recover_names (
         num_names = recov_file_names(names, fname_res, TRUE);
     } else {                      /* check directory dir_name */
       if (fname == NULL) {
-        names[0] = concat_fnames(dir_name, (char_u *)"*.sw?", TRUE);
+        names[0] = (char_u *)concat_fnames((char *)dir_name, "*.sw?", TRUE);
         /* For Unix names starting with a dot are special.  MS-Windows
          * supports this too, on some file systems. */
-        names[1] = concat_fnames(dir_name, (char_u *)".*.sw?", TRUE);
-        names[2] = concat_fnames(dir_name, (char_u *)".sw?", TRUE);
+        names[1] = (char_u *)concat_fnames((char *)dir_name, ".*.sw?", TRUE);
+        names[2] = (char_u *)concat_fnames((char *)dir_name, ".sw?", TRUE);
         num_names = 3;
       } else {
         p = dir_name + STRLEN(dir_name);
@@ -1345,7 +1345,7 @@ recover_names (
           tail = (char_u *)make_percent_swname((char *)dir_name, (char *)fname_res);
         } else {
           tail = path_tail(fname_res);
-          tail = concat_fnames(dir_name, tail, TRUE);
+          tail = (char_u *)concat_fnames((char *)dir_name, (char *)tail, TRUE);
         }
         num_names = recov_file_names(names, tail, FALSE);
         xfree(tail);
@@ -1453,7 +1453,7 @@ static char *make_percent_swname(const char *dir, char *name)
         *d = '%';
       }
     }
-    d = (char *)concat_fnames((char_u *)dir, (char_u *)s, TRUE);
+    d = concat_fnames(dir, s, TRUE);
     xfree(s);
     xfree(f);
   }
@@ -1573,7 +1573,7 @@ static int recov_file_names(char_u **names, char_u *path, int prepend_dot)
   }
 
   // Form the normal swap file name pattern by appending ".sw?".
-  names[num_names] = concat_fnames(path, (char_u *)".sw?", FALSE);
+  names[num_names] = (char_u *)concat_fnames((char *)path, ".sw?", FALSE);
   if (num_names >= 1) {     /* check if we have the same name twice */
     char_u *p = names[num_names - 1];
     int i = (int)STRLEN(names[num_names - 1]) - (int)STRLEN(names[num_names]);
@@ -3123,17 +3123,17 @@ get_file_in_dir (
     retval = vim_strsave(fname);
   else if (dname[0] == '.' && vim_ispathsep(dname[1])) {
     if (tail == fname)              /* no path before file name */
-      retval = concat_fnames(dname + 2, tail, TRUE);
+      retval = (char_u *)concat_fnames((char *)dname + 2, (char *)tail, TRUE);
     else {
       save_char = *tail;
       *tail = NUL;
-      t = concat_fnames(fname, dname + 2, TRUE);
+      t = (char_u *)concat_fnames((char *)fname, (char *)dname + 2, TRUE);
       *tail = save_char;
-      retval = concat_fnames(t, tail, TRUE);
+      retval = (char_u *)concat_fnames((char *)t, (char *)tail, TRUE);
       xfree(t);
     }
   } else {
-    retval = concat_fnames(dname, tail, TRUE);
+    retval = (char_u *)concat_fnames((char *)dname, (char *)tail, TRUE);
   }
 
   return retval;

src/nvim/os/env.c

@@ -379,17 +379,20 @@ void expand_env_esc(char_u *srcp, char_u *dst, int dstlen, bool esc, bool one,
 /// @param vimdir directory to test
 static char *vim_version_dir(const char *vimdir)
 {
-  char_u      *p;
+  char      *p;
 
-  if (vimdir == NULL || *vimdir == NUL)
+  if (vimdir == NULL || *vimdir == NUL) {
     return NULL;
-  p = concat_fnames((char_u *)vimdir, (char_u *)VIM_VERSION_NODOT, true);
-  if (os_isdir(p))
-    return (char *)p;
+  }
+  p = concat_fnames(vimdir, VIM_VERSION_NODOT, true);
+  if (os_isdir((char_u *)p)) {
+    return p;
+  }
   xfree(p);
-  p = concat_fnames((char_u *)vimdir, (char_u *)RUNTIME_DIRNAME, true);
-  if (os_isdir(p))
-    return (char *)p;
+  p = concat_fnames(vimdir, RUNTIME_DIRNAME, true);
+  if (os_isdir((char_u *)p)) {
+    return p;
+  }
   xfree(p);
   return NULL;
 }

src/nvim/path.c

@@ -329,20 +329,25 @@ int vim_fnamencmp(char_u *x, char_u *y, size_t len)
 #endif
 }
 
-/*
- * Concatenate file names fname1 and fname2 into allocated memory.
- * Only add a '/' or '\\' when 'sep' is TRUE and it is necessary.
- */
-char_u *concat_fnames(char_u *fname1, char_u *fname2, int sep)
-  FUNC_ATTR_NONNULL_RET
+/// Concatenate file names fname1 and fname2 into allocated memory.
+///
+/// Only add a '/' or '\\' when 'sep' is true and it is necessary.
+///
+/// @param fname1 is the first part of the path or filename
+/// @param fname2 is the second half of the path or filename
+/// @param sep    is a flag to indicate a path separator should be added
+///               if necessary
+/// @return [allocated] Concatenation of fname1 and fname2.
+char *concat_fnames(const char *fname1, const char *fname2, bool sep)
+  FUNC_ATTR_NONNULL_ARG(1, 2) FUNC_ATTR_NONNULL_RET
 {
-  char_u *dest = xmalloc(STRLEN(fname1) + STRLEN(fname2) + 3);
+  char *dest = xmalloc(strlen(fname1) + strlen(fname2) + 3);
 
-  STRCPY(dest, fname1);
+  strcpy(dest, fname1);
   if (sep) {
-    add_pathsep((char *)dest);
+    add_pathsep(dest);
   }
-  STRCAT(dest, fname2);
+  strcat(dest, fname2);
 
   return dest;
 }

src/nvim/quickfix.c

@@ -1085,7 +1085,7 @@ static int qf_get_fnum(char_u *directory, char_u *fname)
     slash_adjust(fname);
 #endif
     if (directory != NULL && !vim_isAbsName(fname)) {
-      ptr = concat_fnames(directory, fname, TRUE);
+      ptr = (char_u *)concat_fnames((char *)directory, (char *)fname, TRUE);
       /*
        * Here we check if the file really exists.
        * This should normally be true, but if make works without
@@ -1096,7 +1096,7 @@ static int qf_get_fnum(char_u *directory, char_u *fname)
         xfree(ptr);
         directory = qf_guess_filepath(fname);
         if (directory)
-          ptr = concat_fnames(directory, fname, TRUE);
+          ptr = (char_u *)concat_fnames((char *)directory, (char *)fname, TRUE);
         else
           ptr = vim_strsave(fname);
       }
@@ -1137,8 +1137,8 @@ static char_u *qf_push_dir(char_u *dirbuf, struct dir_stack_T **stackptr)
     (*stackptr)->dirname = NULL;
     while (ds_new) {
       xfree((*stackptr)->dirname);
-      (*stackptr)->dirname = concat_fnames(ds_new->dirname, dirbuf,
-          TRUE);
+      (*stackptr)->dirname = (char_u *)concat_fnames((char *)ds_new->dirname,
+          (char *)dirbuf, TRUE);
       if (os_isdir((*stackptr)->dirname))
         break;
 
@@ -1242,7 +1242,7 @@ static char_u *qf_guess_filepath(char_u *filename)
   fullname = NULL;
   while (ds_ptr) {
     xfree(fullname);
-    fullname = concat_fnames(ds_ptr->dirname, filename, TRUE);
+    fullname = (char_u *)concat_fnames((char *)ds_ptr->dirname, (char *)filename, TRUE);
 
     if (os_file_exists(fullname))
       break;

src/nvim/undo.c

@@ -677,7 +677,7 @@ char_u *u_get_undo_file_name(char_u *buf_ffname, int reading)
             if (vim_ispathsep(*p))
               *p = '%';
         }
-        undo_file_name = concat_fnames(dir_name, munged_name, TRUE);
+        undo_file_name = (char_u *)concat_fnames((char *)dir_name, (char *)munged_name, TRUE);
       }
     }