Do not increment of decrement enums

In C++, we can't do arithmetic on enums.  This patch fixes build errors like:

 src/gdb/i386-tdep.c: In function ‘int i386_stap_parse_special_token(gdbarch*, stap_parse_info*)’:
 src/gdb/i386-tdep.c:4309:7: error: no match for ‘operator++’ (operand type is ‘i386_stap_parse_special_token(gdbarch*, stap_parse_info*)::<anonymous enum>’)
	++current_state;
	^
 ...
 src/gdb/rs6000-tdep.c:4265:18: error: no match for ‘operator++’ (operand type is ‘powerpc_vector_abi’)
 src/gdb/arm-tdep.c:9428:71: error: no match for ‘operator++’ (operand type is ‘arm_float_model’)
 src/gdb/arm-tdep.c:9465:64: error: no match for ‘operator++’ (operand type is ‘arm_abi_kind’)
 ...

gdb/ChangeLog:
2015-02-27  Tom Tromey  <tromey@redhat.com>
	    Pedro Alves <palves@redhat.com>

	* arm-tdep.c (set_fp_model_sfunc, arm_set_abi): Use 'int' for
	local used to iterate over enums.
	* completer.c (signal_completer): Likewise.
	* i386-tdep.c (i386_stap_parse_special_token): Likewise.
	* rs6000-tdep.c (powerpc_set_vector_abi): Likewise.
	* tui/tui-data.c (tui_next_win, tui_prev_win): Likewise.
	* tui/tui-layout.c (next_layout, prev_layout): Likewise.
	* tui/tui-win.c (tui_refresh_all_win, tui_rehighlight_all)
	(tui_resize_all, tui_set_focus_command, tui_all_windows_info): Likewise.
	* tui-wingeneral.c (tui_refresh_all):  Likewise.

4 files changed, 11 insertions, 11 deletions

diff --git a/gdb/tui/tui-data.c b/gdb/tui/tui-data.c
index 3c5bce1..3eff9fd 100644
--- a/gdb/tui/tui-data.c
+++ b/gdb/tui/tui-data.c
@@ -319,7 +319,7 @@ tui_set_current_layout_to (enum tui_layout_type new_layout)
 struct tui_win_info *
 tui_next_win (struct tui_win_info *cur_win)
 {
-  enum tui_win_type type = cur_win->generic.type;
+  int type = cur_win->generic.type;
   struct tui_win_info *next_win = (struct tui_win_info *) NULL;
 
   if (cur_win->generic.type == CMD_WIN)
@@ -349,7 +349,7 @@ tui_next_win (struct tui_win_info *cur_win)
 struct tui_win_info *
 tui_prev_win (struct tui_win_info *cur_win)
 {
-  enum tui_win_type type = cur_win->generic.type;
+  int type = cur_win->generic.type;
   struct tui_win_info *prev = (struct tui_win_info *) NULL;
 
   if (cur_win->generic.type == SRC_WIN)
diff --git a/gdb/tui/tui-layout.c b/gdb/tui/tui-layout.c
index 56cc026..6547404 100644
--- a/gdb/tui/tui-layout.c
+++ b/gdb/tui/tui-layout.c
@@ -616,7 +616,7 @@ tui_layout_command (char *arg, int from_tty)
 static enum tui_layout_type
 next_layout (void)
 {
-  enum tui_layout_type new_layout;
+  int new_layout;
 
   new_layout = tui_current_layout ();
   if (new_layout == UNDEFINED_LAYOUT)
@@ -628,7 +628,7 @@ next_layout (void)
 	new_layout = SRC_COMMAND;
     }
 
-  return new_layout;
+  return (enum tui_layout_type) new_layout;
 }
 
 
@@ -636,7 +636,7 @@ next_layout (void)
 static enum tui_layout_type
 prev_layout (void)
 {
-  enum tui_layout_type new_layout;
+  int new_layout;
 
   new_layout = tui_current_layout ();
   if (new_layout == SRC_COMMAND)
@@ -648,7 +648,7 @@ prev_layout (void)
 	new_layout = DISASSEM_DATA_COMMAND;
     }
 
-  return new_layout;
+  return (enum tui_layout_type) new_layout;
 }
 
 
diff --git a/gdb/tui/tui-win.c b/gdb/tui/tui-win.c
index 957addc..4dfa834 100644
--- a/gdb/tui/tui-win.c
+++ b/gdb/tui/tui-win.c
@@ -628,7 +628,7 @@ tui_scroll (enum tui_scroll_direction direction,
 void
 tui_refresh_all_win (void)
 {
-  enum tui_win_type type;
+  int type;
 
   clearok (curscr, TRUE);
   tui_refresh_all (tui_win_list);
@@ -660,7 +660,7 @@ tui_refresh_all_win (void)
 void
 tui_rehighlight_all (void)
 {
-  enum tui_win_type type;
+  int type;
 
   for (type = SRC_WIN; type < MAX_MAJOR_WINDOWS; type++)
     tui_check_and_display_highlight_if_needed (tui_win_list[type]);
@@ -684,7 +684,7 @@ tui_resize_all (void)
       struct tui_win_info *first_win;
       struct tui_win_info *second_win;
       struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
-      enum tui_win_type win_type;
+      int win_type;
       int new_height, split_diff, cmd_split_diff, num_wins_displayed = 2;
 
 #ifdef HAVE_RESIZE_TERM
@@ -1007,7 +1007,7 @@ tui_set_focus_command (char *arg, int from_tty)
 static void
 tui_all_windows_info (char *arg, int from_tty)
 {
-  enum tui_win_type type;
+  int type;
   struct tui_win_info *win_with_focus = tui_win_with_focus ();
 
   for (type = SRC_WIN; (type < MAX_MAJOR_WINDOWS); type++)
diff --git a/gdb/tui/tui-wingeneral.c b/gdb/tui/tui-wingeneral.c
index 72d8cd9..b95da49 100644
--- a/gdb/tui/tui-wingeneral.c
+++ b/gdb/tui/tui-wingeneral.c
@@ -252,7 +252,7 @@ tui_make_all_invisible (void)
 void
 tui_refresh_all (struct tui_win_info **list)
 {
-  enum tui_win_type type;
+  int type;
   struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();
 
   for (type = SRC_WIN; (type < MAX_MAJOR_WINDOWS); type++)