ui: move filesystem code to wsutil/filesystem.c

This function can be used by code outside ui (eg. extcap).

Ping-Bug: 13218
Change-Id: Ic11f7acebefeaf777692df044ebff9b1bc387aa3
Reviewed-on: https://code.wireshark.org/review/19178
Petri-Dish: Dario Lombardo <lomato@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>

2 files changed, 35 insertions, 0 deletions

diff --git a/wsutil/filesystem.c b/wsutil/filesystem.c
index ed8b8c18c2..a7b2329f90 100644
--- a/wsutil/filesystem.c
+++ b/wsutil/filesystem.c
@@ -2121,6 +2121,29 @@ done:
     return FALSE;
 }
 
+gchar *
+data_file_url(const gchar *filename)
+{
+    gchar *file_path;
+    gchar *uri;
+
+    /* Absolute path? */
+    if(g_path_is_absolute(filename)) {
+        file_path = g_strdup(filename);
+    } else if(running_in_build_directory()) {
+        file_path = g_strdup_printf("%s/doc/%s", get_datafile_dir(), filename);
+    } else {
+        file_path = g_strdup_printf("%s/%s", get_datafile_dir(), filename);
+    }
+
+    /* XXX - check, if the file is really existing, otherwise display a simple_dialog about the problem */
+
+    /* convert filename to uri */
+    uri = g_filename_to_uri(file_path, NULL, NULL);
+    g_free(file_path);
+    return uri;
+}
+
 /*
  * Editor modelines
  *
diff --git a/wsutil/filesystem.h b/wsutil/filesystem.h
index 137f0dae63..a45367a69b 100644
--- a/wsutil/filesystem.h
+++ b/wsutil/filesystem.h
@@ -292,6 +292,18 @@ WS_DLL_PUBLIC gboolean files_identical(const char *fname1, const char *fname2);
 WS_DLL_PUBLIC gboolean copy_file_binary_mode(const char *from_filename,
     const char *to_filename);
 
+
+/*
+ * Given a filename return a filesystem URL. Relative paths are prefixed with
+ * the datafile directory path.
+ *
+ * @param filename A file name or path. Relative paths will be prefixed with
+ * the data file directory path.
+ * @return A filesystem URL for the file or NULL on failure. A non-NULL return
+ * value must be freed with g_free().
+ */
+WS_DLL_PUBLIC gchar* data_file_url(const gchar *filename);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */