daemon: Move seek type conversion to shared library

Since converting a GSeekType into an lseek type is repeated in a few
places, move it into shared code.

5 files changed, 34 insertions, 51 deletions

diff --git a/daemon/gvfsbackendafc.c b/daemon/gvfsbackendafc.c
index 3c0b7874..8cd84011 100644
--- a/daemon/gvfsbackendafc.c
+++ b/daemon/gvfsbackendafc.c
@@ -1341,18 +1341,8 @@ g_vfs_backend_afc_seek (GVfsBackendAfc *self,
   int afc_seek_type;
   FileHandle *fh;
 
-  switch (type)
+  if ((afc_seek_type = gvfs_seek_type_to_lseek (type)) == -1)
     {
-    case G_SEEK_SET:
-      afc_seek_type = SEEK_SET;
-      break;
-    case G_SEEK_CUR:
-      afc_seek_type = SEEK_CUR;
-      break;
-    case G_SEEK_END:
-      afc_seek_type = SEEK_END;
-      break;
-    default:
       g_vfs_job_failed(job, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
                        _("Invalid seek type"));
       return 1;
diff --git a/daemon/gvfsbackendsmb.c b/daemon/gvfsbackendsmb.c
index ac338d76..7334ddf7 100644
--- a/daemon/gvfsbackendsmb.c
+++ b/daemon/gvfsbackendsmb.c
@@ -857,21 +857,11 @@ do_seek_on_read (GVfsBackend *backend,
   off_t res;
   smbc_lseek_fn smbc_lseek;
 
-  switch (type)
+  if ((whence = gvfs_seek_type_to_lseek (type)) == -1)
     {
-    case G_SEEK_SET:
-      whence = SEEK_SET;
-      break;
-    case G_SEEK_CUR:
-      whence = SEEK_CUR;
-      break;
-    case G_SEEK_END:
-      whence = SEEK_END;
-      break;
-    default:
       g_vfs_job_failed (G_VFS_JOB (job),
-			G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
-			_("Unsupported seek type"));
+                        G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
+                        _("Unsupported seek type"));
       return;
     }
 
@@ -1346,21 +1336,11 @@ do_seek_on_write (GVfsBackend *backend,
   off_t res;
   smbc_lseek_fn smbc_lseek;
 
-  switch (type)
+  if ((whence = gvfs_seek_type_to_lseek (type)) == -1)
     {
-    case G_SEEK_SET:
-      whence = SEEK_SET;
-      break;
-    case G_SEEK_CUR:
-      whence = SEEK_CUR;
-      break;
-    case G_SEEK_END:
-      whence = SEEK_END;
-      break;
-    default:
       g_vfs_job_failed (G_VFS_JOB (job),
-			G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
-			_("Unsupported seek type"));
+                        G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
+                        _("Unsupported seek type"));
       return;
     }
 
diff --git a/daemon/gvfsbackendtest.c b/daemon/gvfsbackendtest.c
index 6a7d18e5..f6577665 100644
--- a/daemon/gvfsbackendtest.c
+++ b/daemon/gvfsbackendtest.c
@@ -43,6 +43,7 @@
 #include "gvfsjobopenforwrite.h"
 #include "gvfsjobclosewrite.h"
 #include "gvfsjobqueryinfowrite.h"
+#include "gvfsdaemonutils.h"
 
 G_DEFINE_TYPE (GVfsBackendTest, g_vfs_backend_test, G_VFS_TYPE_BACKEND)
 
@@ -218,20 +219,8 @@ do_seek_on_read (GVfsBackend *backend,
 
   g_print ("seek_on_read (%d, %u)\n", (int)offset, type);
 
-  switch (type)
-    {
-    default:
-    case G_SEEK_SET:
-      whence = SEEK_SET;
-      break;
-    case G_SEEK_CUR:
-      whence = SEEK_CUR;
-      break;
-    case G_SEEK_END:
-      whence = SEEK_END;
-      break;
-    }
-      
+  if ((whence = gvfs_seek_type_to_lseek (type)) == -1)
+    whence = SEEK_SET;
   
   fd = GPOINTER_TO_INT (handle);
 
diff --git a/daemon/gvfsdaemonutils.c b/daemon/gvfsdaemonutils.c
index a5f635fe..50f861da 100644
--- a/daemon/gvfsdaemonutils.c
+++ b/daemon/gvfsdaemonutils.c
@@ -232,3 +232,25 @@ gvfs_randomize_string (char *str, int len)
   for (i = 0; i < len; i++)
     str[i] = chars[g_random_int_range (0, strlen(chars))];
 }
+
+/**
+ * gvfs_seek_type_to_lseek:
+ * @type: the seek type
+ *
+ * Takes a GSeekType and converts it to an lseek type.
+ **/
+int
+gvfs_seek_type_to_lseek (GSeekType type)
+{
+  switch (type)
+    {
+    case G_SEEK_CUR:
+      return SEEK_CUR;
+    case G_SEEK_SET:
+      return SEEK_SET;
+    case G_SEEK_END:
+      return SEEK_END;
+    default:
+      return -1;
+    }
+}
diff --git a/daemon/gvfsdaemonutils.h b/daemon/gvfsdaemonutils.h
index b08d7946..a586a6a9 100644
--- a/daemon/gvfsdaemonutils.h
+++ b/daemon/gvfsdaemonutils.h
@@ -42,6 +42,8 @@ void	     gvfs_file_info_populate_content_types  (GFileInfo        *info,
 
 void         gvfs_randomize_string (char *str, int len);
 
+int          gvfs_seek_type_to_lseek (GSeekType type);
+
 G_END_DECLS
 
 #endif /* __G_VFS_DAEMON_UTILS_H__ */