[gnome-autoar] Prevent using AUTOAR_*_LAST constant outside autoar-format-filter.[ch]

[Ting-Wei Lan <lantw src gnome org>]

commit 3defbdd1594ff2a8d1c1fa7a523f6cf77d8f697a
Author: Ting-Wei Lan <lantw44 gmail com>
Date:   Fri Sep 6 18:19:55 2013 +0800

    Prevent using AUTOAR_*_LAST constant outside autoar-format-filter.[ch]

 gnome-autoar/autoar-format-filter.c |   44 ++++++++++++++++++++++------------
 gnome-autoar/autoar-format-filter.h |    2 +
 gnome-autoar/autoar-gtk.c           |   10 ++++---
 gnome-autoar/autoar-pref.c          |    4 +-
 4 files changed, 38 insertions(+), 22 deletions(-)
---
diff --git a/gnome-autoar/autoar-format-filter.c b/gnome-autoar/autoar-format-filter.c
index 3010664..97e0233 100644
--- a/gnome-autoar/autoar-format-filter.c
+++ b/gnome-autoar/autoar-format-filter.c
@@ -104,6 +104,12 @@ static AutoarFilterDescription autoar_filter_description[] = {
     "application/x-lrzip",   "Long Range ZIP (lrzip)" }
 };
 
+AutoarFormat
+autoar_format_last (void)
+{
+  return AUTOAR_FORMAT_LAST;
+}
+
 gboolean
 autoar_format_is_valid (AutoarFormat format)
 {
@@ -113,28 +119,28 @@ autoar_format_is_valid (AutoarFormat format)
 const char*
 autoar_format_get_mime_type (AutoarFormat format)
 {
-  g_return_val_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST, NULL);
+  g_return_val_if_fail (autoar_format_is_valid (format) , NULL);
   return autoar_format_description[format - 1].mime_type;
 }
 
 const char*
 autoar_format_get_extension (AutoarFormat format)
 {
-  g_return_val_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST, NULL);
+  g_return_val_if_fail (autoar_format_is_valid (format), NULL);
   return autoar_format_description[format - 1].extension;
 }
 
 const char*
 autoar_format_get_description (AutoarFormat format)
 {
-  g_return_val_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST, NULL);
+  g_return_val_if_fail (autoar_format_is_valid (format), NULL);
   return autoar_format_description[format - 1].description;
 }
 
 int
 autoar_format_get_format_libarchive (AutoarFormat format)
 {
-  g_return_val_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST, -1);
+  g_return_val_if_fail (autoar_format_is_valid (format), -1);
   return autoar_format_description[format - 1].libarchive_format;
 }
 
@@ -144,7 +150,7 @@ autoar_format_get_description_libarchive (AutoarFormat format)
   struct archive* a;
   gchar *str;
 
-  g_return_val_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST, NULL);
+  g_return_val_if_fail (autoar_format_is_valid (format), NULL);
 
   a = archive_write_new ();
   archive_write_set_format (a, autoar_format_description[format - 1].libarchive_format);
@@ -154,6 +160,12 @@ autoar_format_get_description_libarchive (AutoarFormat format)
   return str;
 }
 
+AutoarFilter
+autoar_filter_last (void)
+{
+  return AUTOAR_FILTER_LAST;
+}
+
 gboolean
 autoar_filter_is_valid (AutoarFilter filter)
 {
@@ -163,28 +175,28 @@ autoar_filter_is_valid (AutoarFilter filter)
 const char*
 autoar_filter_get_mime_type (AutoarFilter filter)
 {
-  g_return_val_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST, NULL);
+  g_return_val_if_fail (autoar_filter_is_valid (filter), NULL);
   return autoar_filter_description[filter - 1].mime_type;
 }
 
 const char*
 autoar_filter_get_extension (AutoarFilter filter)
 {
-  g_return_val_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST, NULL);
+  g_return_val_if_fail (autoar_filter_is_valid (filter), NULL);
   return autoar_filter_description[filter - 1].extension;
 }
 
 const char*
 autoar_filter_get_description (AutoarFilter filter)
 {
-  g_return_val_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST, NULL);
+  g_return_val_if_fail (autoar_filter_is_valid (filter), NULL);
   return autoar_filter_description[filter - 1].description;
 }
 
 int
 autoar_filter_get_filter_libarchive (AutoarFilter filter)
 {
-  g_return_val_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST, -1);
+  g_return_val_if_fail (autoar_filter_is_valid (filter), -1);
   return autoar_filter_description[filter - 1].libarchive_filter;
 }
 
@@ -194,7 +206,7 @@ autoar_filter_get_description_libarchive (AutoarFilter filter)
   struct archive *a;
   gchar *str;
 
-  g_return_val_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST, NULL);
+  g_return_val_if_fail (autoar_filter_is_valid (filter), NULL);
 
   a = archive_write_new ();
   archive_write_add_filter (a, autoar_filter_description[filter - 1].libarchive_filter);
@@ -208,8 +220,8 @@ gchar*
 autoar_format_filter_get_mime_type (AutoarFormat format,
                                     AutoarFilter filter)
 {
-  g_return_val_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST, NULL);
-  g_return_val_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST, NULL);
+  g_return_val_if_fail (autoar_format_is_valid (format), NULL);
+  g_return_val_if_fail (autoar_filter_is_valid (filter), NULL);
 
   switch (filter) {
     case AUTOAR_FILTER_NONE:
@@ -235,8 +247,8 @@ gchar*
 autoar_format_filter_get_extension (AutoarFormat format,
                                     AutoarFilter filter)
 {
-  g_return_val_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST, NULL);
-  g_return_val_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST, NULL);
+  g_return_val_if_fail (autoar_format_is_valid (format), NULL);
+  g_return_val_if_fail (autoar_filter_is_valid (filter), NULL);
 
   return g_strconcat (".",
                       autoar_format_description[format - 1].extension,
@@ -252,8 +264,8 @@ autoar_format_filter_get_description (AutoarFormat format,
   gchar *mime_type;
   gchar *description;
 
-  g_return_val_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST, NULL);
-  g_return_val_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST, NULL);
+  g_return_val_if_fail (autoar_format_is_valid (format), NULL);
+  g_return_val_if_fail (autoar_filter_is_valid (filter), NULL);
 
   mime_type = autoar_format_filter_get_mime_type (format, filter);
   description = g_content_type_get_description (mime_type);
diff --git a/gnome-autoar/autoar-format-filter.h b/gnome-autoar/autoar-format-filter.h
index 9449f7e..2175936 100644
--- a/gnome-autoar/autoar-format-filter.h
+++ b/gnome-autoar/autoar-format-filter.h
@@ -62,6 +62,7 @@ typedef enum {
   AUTOAR_FILTER_LAST /*< skip >*/
 } AutoarFilter;
 
+AutoarFormat  autoar_format_last                        (void);
 gboolean      autoar_format_is_valid                    (AutoarFormat format);
 const char   *autoar_format_get_mime_type               (AutoarFormat format);
 const char   *autoar_format_get_extension               (AutoarFormat format);
@@ -69,6 +70,7 @@ const char   *autoar_format_get_description             (AutoarFormat format);
 int           autoar_format_get_format_libarchive       (AutoarFormat format);
 gchar        *autoar_format_get_description_libarchive  (AutoarFormat format);
 
+AutoarFilter  autoar_filter_last                        (void);
 gboolean      autoar_filter_is_valid                    (AutoarFilter filter);
 const char   *autoar_filter_get_mime_type               (AutoarFilter filter);
 const char   *autoar_filter_get_extension               (AutoarFilter filter);
diff --git a/gnome-autoar/autoar-gtk.c b/gnome-autoar/autoar-gtk.c
index 38cba8d..ab9dc1c 100644
--- a/gnome-autoar/autoar-gtk.c
+++ b/gnome-autoar/autoar-gtk.c
@@ -358,10 +358,11 @@ static GtkTreeModel*
 advanced_format_store (void)
 {
   GtkListStore *store;
-  int i;
+  int i, last;
 
   store = gtk_list_store_new (N_ADVANCED_FORMAT_COLS, G_TYPE_INT, G_TYPE_STRING);
-  for (i = 1; i < AUTOAR_FORMAT_LAST; i++) {
+  last = autoar_format_last ();
+  for (i = 1; i < last; i++) {
     GtkTreeIter iter;
     const char *description;
 
@@ -379,10 +380,11 @@ static GtkTreeModel*
 advanced_filter_store (void)
 {
   GtkListStore *store;
-  int i;
+  int i, last;
 
   store = gtk_list_store_new (N_ADVANCED_FILTER_COLS, G_TYPE_INT, G_TYPE_STRING);
-  for (i = 1; i < AUTOAR_FILTER_LAST; i++) {
+  last = autoar_filter_last ();
+  for (i = 1; i < last; i++) {
     GtkTreeIter iter;
     const char *description;
 
diff --git a/gnome-autoar/autoar-pref.c b/gnome-autoar/autoar-pref.c
index ed563bc..ae353ab 100644
--- a/gnome-autoar/autoar-pref.c
+++ b/gnome-autoar/autoar-pref.c
@@ -201,7 +201,7 @@ autoar_pref_set_default_format (AutoarPref *arpref,
                                 AutoarFormat format)
 {
   g_return_if_fail (AUTOAR_IS_PREF (arpref));
-  g_return_if_fail (format > 0 && format < AUTOAR_FORMAT_LAST);
+  g_return_if_fail (autoar_format_is_valid (format));
   if (arpref->priv->modification_enabled && format != arpref->priv->default_format)
     arpref->priv->modification_flags |= MODIFIED_DEFAULT_FORMAT;
   arpref->priv->default_format = format;
@@ -212,7 +212,7 @@ autoar_pref_set_default_filter (AutoarPref *arpref,
                                 AutoarFilter filter)
 {
   g_return_if_fail (AUTOAR_IS_PREF (arpref));
-  g_return_if_fail (filter > 0 && filter < AUTOAR_FILTER_LAST);
+  g_return_if_fail (autoar_filter_is_valid (filter));
   if (arpref->priv->modification_enabled && filter != arpref->priv->default_filter)
     arpref->priv->modification_flags |= MODIFIED_DEFAULT_FILTER;
   arpref->priv->default_filter = filter;