vim-patch:partial:9.0.1196: code is indented more than necessary (#21796)

Problem:    Code is indented more than necessary.
Solution:   Use an early return where it makes sense. (Yegappan Lakshmanan,
            closes vim/vim#11813)

e857598896

Partial port as this depends on some previous eval and 'smoothscroll'
patches.

Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>

src/nvim/eval/typval.c

@@ -326,11 +326,13 @@ void tv_list_free_list(list_T *const l)
 void tv_list_free(list_T *const l)
   FUNC_ATTR_NONNULL_ALL
 {
-  if (!tv_in_free_unref_items) {
+  if (tv_in_free_unref_items) {
+    return;
+  }
+
   tv_list_free_contents(l);
   tv_list_free_list(l);
 }
-}
 
 /// Unreference a list
 ///

src/nvim/keycodes.c

@@ -403,7 +403,10 @@ int name_to_mod_mask(int c)
 int simplify_key(const int key, int *modifiers)
   FUNC_ATTR_WARN_UNUSED_RESULT FUNC_ATTR_NONNULL_ALL
 {
-  if (*modifiers & (MOD_MASK_SHIFT | MOD_MASK_CTRL | MOD_MASK_ALT)) {
+  if (!(*modifiers & (MOD_MASK_SHIFT | MOD_MASK_CTRL | MOD_MASK_ALT))) {
+    return key;
+  }
+
   // TAB is a special case.
   if (key == TAB && (*modifiers & MOD_MASK_SHIFT)) {
     *modifiers &= ~MOD_MASK_SHIFT;
@@ -420,7 +423,6 @@ int simplify_key(const int key, int *modifiers)
                          modifier_keys_table[i + 2]);
     }
   }
-  }
   return key;
 }
 

src/nvim/locale.c

@@ -317,24 +317,27 @@ static char **find_locales(void)
 static void init_locales(void)
 {
 # ifndef MSWIN
-  if (!did_init_locales) {
+  if (did_init_locales) {
+    return;
+  }
+
   did_init_locales = true;
   locales = find_locales();
-  }
 # endif
 }
 
 # if defined(EXITFREE)
 void free_locales(void)
 {
-  int i;
-  if (locales != NULL) {
-    for (i = 0; locales[i] != NULL; i++) {
+  if (locales == NULL) {
+    return;
+  }
+
+  for (int i = 0; locales[i] != NULL; i++) {
     xfree(locales[i]);
   }
   XFREE_CLEAR(locales);
 }
-}
 # endif
 
 /// Function given to ExpandGeneric() to obtain the possible arguments of the

src/nvim/main.c

@@ -1828,7 +1828,10 @@ static void exe_pre_commands(mparm_T *parmp)
   int cnt = parmp->n_pre_commands;
   int i;
 
-  if (cnt > 0) {
+  if (cnt <= 0) {
+    return;
+  }
+
   curwin->w_cursor.lnum = 0;     // just in case..
   estack_push(ETYPE_ARGS, _("pre-vimrc command line"), 0);
   current_sctx.sc_sid = SID_CMDARG;
@@ -1839,7 +1842,6 @@ static void exe_pre_commands(mparm_T *parmp)
   current_sctx.sc_sid = 0;
   TIME_MSG("--cmd commands");
 }
-}
 
 // Execute "+", "-c" and "-S" arguments.
 static void exe_commands(mparm_T *parmp)
@@ -2079,7 +2081,10 @@ static int execute_env(char *env)
   FUNC_ATTR_NONNULL_ALL
 {
   const char *initstr = os_getenv(env);
-  if (initstr != NULL) {
+  if (initstr == NULL) {
+    return FAIL;
+  }
+
   estack_push(ETYPE_ENV, env, 0);
   const sctx_T save_current_sctx = current_sctx;
   current_sctx.sc_sid = SID_ENV;
@@ -2091,8 +2096,6 @@ static int execute_env(char *env)
   current_sctx = save_current_sctx;
   return OK;
 }
-  return FAIL;
-}
 
 /// Prints the following then exits:
 /// - An error message `errstr`

src/nvim/mark.c

@@ -653,7 +653,10 @@ fmark_T *getnextmark(pos_T *startpos, int dir, int begin_line)
 // until the mark is used to avoid a long startup delay.
 static void fname2fnum(xfmark_T *fm)
 {
-  if (fm->fname != NULL) {
+  if (fm->fname == NULL) {
+    return;
+  }
+
   // First expand "~/" in the file name to the home directory.
   // Don't expand the whole name, it may contain other '~' chars.
 #ifdef BACKSLASH_IN_FILENAME
@@ -676,7 +679,6 @@ static void fname2fnum(xfmark_T *fm)
   // buflist_new() will call fmarks_check_names()
   (void)buflist_new(NameBuff, p, (linenr_T)1, 0);
 }
-}
 
 // Check all file marks for a name that matches the file name in buf.
 // May replace the name with an fnum.

src/nvim/match.c

@@ -880,13 +880,15 @@ static int matchadd_dict_arg(typval_T *tv, const char **conceal_char, win_T **wi
     *conceal_char = tv_get_string(&di->di_tv);
   }
 
-  if ((di = tv_dict_find(tv->vval.v_dict, S_LEN("window"))) != NULL) {
+  if ((di = tv_dict_find(tv->vval.v_dict, S_LEN("window"))) == NULL) {
+    return OK;
+  }
+
   *win = find_win_by_nr_or_id(&di->di_tv);
   if (*win == NULL) {
     emsg(_(e_invalwindow));
     return FAIL;
   }
-  }
 
   return OK;
 }

src/nvim/memfile.c

@@ -767,12 +767,14 @@ void mf_set_fnames(memfile_T *mfp, char *fname)
 /// Used before doing a :cd
 void mf_fullname(memfile_T *mfp)
 {
-  if (mfp != NULL && mfp->mf_fname != NULL && mfp->mf_ffname != NULL) {
+  if (mfp == NULL || mfp->mf_fname == NULL || mfp->mf_ffname == NULL) {
+    return;
+  }
+
   xfree(mfp->mf_fname);
   mfp->mf_fname = mfp->mf_ffname;
   mfp->mf_ffname = NULL;
 }
-}
 
 /// Return true if there are any translations pending for memfile.
 bool mf_need_trans(memfile_T *mfp)

src/nvim/memline.c

@@ -1377,7 +1377,10 @@ char *make_percent_swname(const char *dir, const char *name)
 {
   char *d = NULL;
   char *f = fix_fname(name != NULL ? name : "");
-  if (f != NULL) {
+  if (f == NULL) {
+    return NULL;
+  }
+
   char *s = xstrdup(f);
   for (d = s; *d != NUL; MB_PTR_ADV(d)) {
     if (vim_ispathsep(*d)) {
@@ -1387,7 +1390,6 @@ char *make_percent_swname(const char *dir, const char *name)
   d = concat_fnames(dir, s, true);
   xfree(s);
   xfree(f);
-  }
   return d;
 }
 

src/nvim/menu.c

@@ -1449,9 +1449,11 @@ void show_popupmenu(void)
   }
 
   // Only show a popup when it is defined and has entries
-  if (menu != NULL && menu->children != NULL) {
-    pum_show_popupmenu(menu);
+  if (menu == NULL || menu->children == NULL) {
+    return;
   }
+
+  pum_show_popupmenu(menu);
 }
 
 /// Execute "menu".  Use by ":emenu" and the window toolbar.

src/nvim/move.c

@@ -606,30 +606,40 @@ void validate_virtcol(void)
 void validate_virtcol_win(win_T *wp)
 {
   check_cursor_moved(wp);
-  if (!(wp->w_valid & VALID_VIRTCOL)) {
+
+  if (wp->w_valid & VALID_VIRTCOL) {
+    return;
+  }
+
   getvvcol(wp, &wp->w_cursor, NULL, &(wp->w_virtcol), NULL);
   redraw_for_cursorcolumn(wp);
   wp->w_valid |= VALID_VIRTCOL;
 }
-}
 
 // Validate curwin->w_cline_height only.
 void validate_cheight(void)
 {
   check_cursor_moved(curwin);
-  if (!(curwin->w_valid & VALID_CHEIGHT)) {
+
+  if (curwin->w_valid & VALID_CHEIGHT) {
+    return;
+  }
+
   curwin->w_cline_height = plines_win_full(curwin, curwin->w_cursor.lnum,
                                            NULL, &curwin->w_cline_folded,
                                            true);
   curwin->w_valid |= VALID_CHEIGHT;
 }
-}
 
 // Validate w_wcol and w_virtcol only.
 void validate_cursor_col(void)
 {
   validate_virtcol();
-  if (!(curwin->w_valid & VALID_WCOL)) {
+
+  if (curwin->w_valid & VALID_WCOL) {
+    return;
+  }
+
   colnr_T col = curwin->w_virtcol;
   colnr_T off = curwin_col_off();
   col += off;
@@ -650,7 +660,6 @@ void validate_cursor_col(void)
 
   curwin->w_valid |= VALID_WCOL;
 }
-}
 
 // Compute offset of a window, occupied by absolute or relative line number,
 // fold column and sign column (these don't move when scrolling horizontally).

src/nvim/ui.c

@@ -292,7 +292,10 @@ void vim_beep(unsigned val)
 {
   called_vim_beep = true;
 
-  if (emsg_silent == 0 && !in_assert_fails) {
+  if (emsg_silent != 0 || in_assert_fails) {
+    return;
+  }
+
   if (!((bo_flags & val) || (bo_flags & BO_ALL))) {
     static int beeps = 0;
     static uint64_t start_time = 0;
@@ -321,7 +324,6 @@ void vim_beep(unsigned val)
     msg_attr(_("Beep!"), HL_ATTR(HLF_W));
   }
 }
-}
 
 void ui_attach_impl(UI *ui, uint64_t chanid)
 {