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.

9 files changed, 32 insertions, 17 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 7f3043f..ab36c65 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,17 @@
+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.
+
 2015-02-27  Pedro Alves  <palves@redhat.com>
 
 	* target.h: Include "infrun.h".
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index f3a6325..4f9bb40 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -9405,7 +9405,7 @@ static void
 set_fp_model_sfunc (char *args, int from_tty,
 		    struct cmd_list_element *c)
 {
-  enum arm_float_model fp_model;
+  int fp_model;
 
   for (fp_model = ARM_FLOAT_AUTO; fp_model != ARM_FLOAT_LAST; fp_model++)
     if (strcmp (current_fp_model, fp_model_strings[fp_model]) == 0)
@@ -9442,7 +9442,7 @@ static void
 arm_set_abi (char *args, int from_tty,
 	     struct cmd_list_element *c)
 {
-  enum arm_abi_kind arm_abi;
+  int arm_abi;
 
   for (arm_abi = ARM_ABI_AUTO; arm_abi != ARM_ABI_LAST; arm_abi++)
     if (strcmp (arm_abi_string, arm_abi_strings[arm_abi]) == 0)
diff --git a/gdb/completer.c b/gdb/completer.c
index efcb771..58418f6 100644
--- a/gdb/completer.c
+++ b/gdb/completer.c
@@ -944,7 +944,7 @@ signal_completer (struct cmd_list_element *ignore,
 {
   VEC (char_ptr) *return_val = NULL;
   size_t len = strlen (word);
-  enum gdb_signal signum;
+  int signum;
   const char *signame;
 
   for (signum = GDB_SIGNAL_FIRST; signum != GDB_SIGNAL_LAST; ++signum)
@@ -953,7 +953,7 @@ signal_completer (struct cmd_list_element *ignore,
       if (signum == GDB_SIGNAL_0)
 	continue;
 
-      signame = gdb_signal_to_name (signum);
+      signame = gdb_signal_to_name ((enum gdb_signal) signum);
 
       /* Ignore the unknown signal case.  */
       if (!signame || strcmp (signame, "?") == 0)
diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 1c8842c..8c08f8b 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -4270,7 +4270,8 @@ i386_stap_parse_special_token (struct gdbarch *gdbarch,
       TRIPLET,
       THREE_ARG_DISPLACEMENT,
       DONE
-    } current_state;
+    };
+  int current_state;
 
   current_state = TRIPLET;
 
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index ef94bba..46f6e41 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -6049,7 +6049,7 @@ powerpc_set_vector_abi (char *args, int from_tty,
 			struct cmd_list_element *c)
 {
   struct gdbarch_info info;
-  enum powerpc_vector_abi vector_abi;
+  int vector_abi;
 
   for (vector_abi = POWERPC_VEC_AUTO;
        vector_abi != POWERPC_VEC_LAST;
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++)