[gnome-photos] utils: Add photos_utils_filename_strip_extension

[Debarshi Ray <debarshir src gnome org>]

commit 6d80d4b995235d0481b72b438af19f70804d8a4c
Author: Debarshi Ray <debarshir gnome org>
Date:   Sat Apr 28 01:16:05 2012 +0200

    utils: Add photos_utils_filename_strip_extension

 src/photos-utils.c |   50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/photos-utils.h |    2 ++
 2 files changed, 52 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-utils.c b/src/photos-utils.c
index 54a09e0..9711e52 100644
--- a/src/photos-utils.c
+++ b/src/photos-utils.c
@@ -21,6 +21,10 @@
 
 #include "config.h"
 
+#include <string.h>
+
+#include <glib.h>
+
 #include "photos-utils.h"
 
 
@@ -30,3 +34,49 @@ photos_utils_alpha_gtk_widget (GtkWidget *widget)
   GdkRGBA color = {0.0, 0.0, 0.0, 0.0};
   gtk_widget_override_background_color (widget, GTK_STATE_FLAG_NORMAL, &color);
 }
+
+
+static gchar *
+photos_utils_filename_get_extension_offset (const gchar *filename)
+{
+  gchar *end;
+  gchar *end2;
+
+  end = strrchr (filename, '.');
+
+  if (end != NULL && end != filename)
+    {
+      if (g_strcmp0 (end, ".gz") == 0
+          || g_strcmp0 (end, ".bz2") == 0
+          || g_strcmp0 (end, ".sit") == 0
+          || g_strcmp0 (end, ".Z") == 0)
+        {
+          end2 = end - 1;
+          while (end2 > filename && *end2 != '.')
+            end2--;
+          if (end2 != filename)
+            end = end2;
+        }
+  }
+
+  return end;
+}
+
+
+gchar *
+photos_utils_filename_strip_extension (const gchar *filename_with_extension)
+{
+  gchar *end;
+  gchar *filename;
+
+  if (filename_with_extension == NULL)
+    return NULL;
+
+  filename = g_strdup (filename_with_extension);
+  end = photos_utils_filename_get_extension_offset (filename);
+
+  if (end != NULL && end != filename)
+    *end = '\0';
+
+  return filename;
+}
diff --git a/src/photos-utils.h b/src/photos-utils.h
index a15e885..41840e9 100644
--- a/src/photos-utils.h
+++ b/src/photos-utils.h
@@ -27,6 +27,8 @@ G_BEGIN_DECLS
 
 void             photos_utils_alpha_gtk_widget            (GtkWidget *widget);
 
+gchar           *photos_utils_filename_strip_extension    (const gchar *filename_with_extension);
+
 G_END_DECLS
 
 #endif /* PHOTOS_UTILS_H */