patch 9.0.1098: code uses too much indent

Problem:    Code uses too much indent.
Solution:   Use an early return. (Yegappan Lakshmanan, closes #11747)

src/cmdhist.c

@@ -460,16 +460,17 @@ del_history_entry(int histype, char_u *str)
     int		last;
     int		found = FALSE;
 
-    regmatch.regprog = NULL;
+    if (hislen == 0 || histype < 0 || histype >= HIST_COUNT || *str == NUL
+		|| hisidx[histype] < 0)
+	return FALSE;
+
+    idx = hisidx[histype];
+    regmatch.regprog = vim_regcomp(str, RE_MAGIC + RE_STRING);
+    if (regmatch.regprog == NULL)
+	return FALSE;
+
     regmatch.rm_ic = FALSE;	// always match case
-    if (hislen != 0
+
-	    && histype >= 0
-	    && histype < HIST_COUNT
-	    && *str != NUL
-	    && (idx = hisidx[histype]) >= 0
-	    && (regmatch.regprog = vim_regcomp(str, RE_MAGIC + RE_STRING))
-								      != NULL)
-    {
     i = last = idx;
     do
     {
@@ -495,9 +496,10 @@ del_history_entry(int histype, char_u *str)
 	if (--i < 0)
 	    i += hislen;
     } while (i != idx);
+
     if (history[histype][idx].hisstr == NULL)
 	hisidx[histype] = -1;
-    }
+
     vim_regfree(regmatch.regprog);
     return found;
 }

src/debugger.c

@@ -682,8 +682,9 @@ ex_breakadd(exarg_T *eap)
 	gap = &prof_ga;
 #endif
 
-    if (dbg_parsearg(eap->arg, gap) == OK)
+    if (dbg_parsearg(eap->arg, gap) != OK)
-    {
+	return;
+
     bp = &DEBUGGY(gap, gap->ga_len);
     bp->dbg_forceit = eap->forceit;
 
@@ -720,7 +721,6 @@ ex_breakadd(exarg_T *eap)
 	    has_expr_breakpoint = TRUE;
     }
 }
-}
 
 /*
  * ":debuggreedy".
@@ -822,9 +822,11 @@ ex_breakdel(exarg_T *eap)
     }
 
     if (todel < 0)
-	semsg(_(e_breakpoint_not_found_str), eap->arg);
-    else
     {
+	semsg(_(e_breakpoint_not_found_str), eap->arg);
+	return;
+    }
+
     while (gap->ga_len > 0)
     {
 	vim_free(DEBUGGY(gap, todel).dbg_name);
@@ -852,7 +854,6 @@ ex_breakdel(exarg_T *eap)
     if (gap == &dbg_breakp)
 	update_has_expr_breakpoint();
 }
-}
 
 /*
  * ":breaklist".
@@ -864,8 +865,11 @@ ex_breaklist(exarg_T *eap UNUSED)
     int		i;
 
     if (dbg_breakp.ga_len == 0)
+    {
 	msg(_("No breakpoints defined"));
-    else
+	return;
+    }
+
     for (i = 0; i < dbg_breakp.ga_len; ++i)
     {
 	bp = &BREAKP(i);

src/diff.c

@@ -1180,11 +1180,8 @@ diff_file(diffio_T *dio)
 #endif
     // Use xdiff for generating the diff.
     if (dio->dio_internal)
-    {
 	return diff_file_internal(dio);
-    }
+
-    else
-    {
     len = STRLEN(tmp_orig) + STRLEN(tmp_new)
 				+ STRLEN(tmp_diff) + STRLEN(p_srr) + 27;
     cmd = alloc(len);
@@ -1218,7 +1215,6 @@ diff_file(diffio_T *dio)
     vim_free(cmd);
     return OK;
 }
-}
 
 /*
  * Create a new version of a file from the current buffer and a diff file.
@@ -1432,15 +1428,17 @@ ex_diffsplit(exarg_T *eap)
     // don't use a new tab page, each tab page has its own diffs
     cmdmod.cmod_tab = 0;
 
-    if (win_split(0, (diff_flags & DIFF_VERTICAL) ? WSP_VERT : 0) != FAIL)
+    if (win_split(0, (diff_flags & DIFF_VERTICAL) ? WSP_VERT : 0) == FAIL)
-    {
+	return;
+
     // Pretend it was a ":split fname" command
     eap->cmdidx = CMD_split;
     curwin->w_p_diff = TRUE;
     do_exedit(eap, old_curwin);
 
-	if (curwin != old_curwin)		// split must have worked
+    if (curwin == old_curwin)		// split didn't work
-	{
+	return;
+
     // Set 'diff', 'scrollbind' on and 'wrap' off.
     diff_win_options(curwin, TRUE);
     if (win_valid(old_curwin))
@@ -1456,8 +1454,6 @@ ex_diffsplit(exarg_T *eap)
     // relative position.
     scroll_to_fraction(curwin, curwin->w_height);
 }
-    }
-}
 
 /*
  * Set options to show diffs for the current window.

src/digraph.c

@@ -1681,15 +1681,15 @@ registerdigraph(int char1, int char2, int n)
     }
 
     // Add a new digraph to the table.
-    if (ga_grow(&user_digraphs, 1) == OK)
+    if (ga_grow(&user_digraphs, 1) != OK)
-    {
+	return;
+
     dp = (digr_T *)user_digraphs.ga_data + user_digraphs.ga_len;
     dp->char1 = char1;
     dp->char2 = char2;
     dp->result = n;
     ++user_digraphs.ga_len;
 }
-}
 
 /*
  * Check the characters are valid for a digraph.
@@ -1948,8 +1948,9 @@ printdigraph(digr_T *dp, result_T *previous)
     else
 	list_width = 11;
 
-    if (dp->result != 0)
+    if (dp->result == 0)
-    {
+	return;
+
 #if defined(USE_UNICODE_DIGRAPHS)
     if (previous != NULL)
     {
@@ -1996,7 +1997,6 @@ printdigraph(digr_T *dp, result_T *previous)
     vim_snprintf((char *)p, sizeof(buf) - (p - buf), " %3d", dp->result);
     msg_outtrans(buf);
 }
-}
 
 # ifdef FEAT_EVAL
 /*

src/drawline.c

@@ -225,8 +225,9 @@ handle_foldcolumn(win_T *wp, winlinevars_T *wlv)
     // Allocate a buffer, "wlv->extra[]" may already be in use.
     vim_free(wlv->p_extra_free);
     wlv->p_extra_free = alloc(MAX_MCO * fdc + 1);
-    if (wlv->p_extra_free != NULL)
+    if (wlv->p_extra_free == NULL)
-    {
+	return;
+
     wlv->n_extra = (int)fill_foldcolumn(wlv->p_extra_free,
 	    wp, FALSE, wlv->lnum);
     wlv->p_extra_free[wlv->n_extra] = NUL;
@@ -238,7 +239,6 @@ handle_foldcolumn(win_T *wp, winlinevars_T *wlv)
     else
 	wlv->char_attr = hl_combine_attr(wlv->wcr_attr, HL_ATTR(HLF_FC));
 }
-}
 #endif
 
 #ifdef FEAT_SIGNS

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1098,
 /**/
     1097,
 /**/