[evolution-data-server] Add function to validate binary data

[Dan VrÃtil <dvratil src gnome org>]

commit ac9664207d8d030a667e88ef0174c2ceffc1d4bd
Author: Dan VrÃtil <dvratil redhat com>
Date:   Thu Aug 23 11:09:24 2012 +0200

    Add function to validate binary data
    
    bug #680786

 libedataserver/e-data-server-util.c |   33 +++++++++++++++++++++++++--------
 libedataserver/e-data-server-util.h |    2 ++
 2 files changed, 27 insertions(+), 8 deletions(-)
---
diff --git a/libedataserver/e-data-server-util.c b/libedataserver/e-data-server-util.c
index ff3c261..7ffe27f 100644
--- a/libedataserver/e-data-server-util.c
+++ b/libedataserver/e-data-server-util.c
@@ -469,18 +469,35 @@ e_util_utf8_remove_accents (const gchar *str)
 gchar *
 e_util_utf8_make_valid (const gchar *str)
 {
+	return e_util_utf8_data_make_valid (str, strlen (str));
+}
+
+/**
+ * e_util_utf8_data_make_valid:
+ * @data: UTF-8 binary data
+ * @data_bytes: length of the binary data
+ *
+ * Returns a newly-allocated NULL-terminated string with invalid characters
+ * replaced by Unicode replacement characters (U+FFFD).
+ *
+ * Returns: a newly-allocated string
+ *
+ * Since: 3.6
+ */
+gchar *
+e_util_utf8_data_make_valid (const gchar *data,
+			     gsize data_bytes)
+{
 	/* almost identical copy of glib's _g_utf8_make_valid() */
 	GString *string;
 	const gchar *remainder, *invalid;
-	gint remaining_bytes, valid_bytes, total_bytes;
+	gint remaining_bytes, valid_bytes;
 
-	g_return_val_if_fail (str != NULL, NULL);
+	g_return_val_if_fail (data != NULL, NULL);
 
 	string = NULL;
-	remainder = str;
-	remaining_bytes = strlen (str);
-
-	total_bytes = remaining_bytes;
+	remainder = (gchar *) data,
+	remaining_bytes = data_bytes;
 
 	while (remaining_bytes != 0) {
 		if (g_utf8_validate (remainder, remaining_bytes, &invalid))
@@ -499,11 +516,11 @@ e_util_utf8_make_valid (const gchar *str)
 	}
 
 	if (string == NULL)
-		return g_strndup (str, total_bytes);
+		return g_strndup ((gchar *) data, data_bytes);
 
 	g_string_append (string, remainder);
 
-	g_assert (g_utf8_validate (string->str, -1, NULL));
+	g_warn_if_fail (g_utf8_validate (string->str, -1, NULL));
 
 	return g_string_free (string, FALSE);
 }
diff --git a/libedataserver/e-data-server-util.h b/libedataserver/e-data-server-util.h
index 24e26a1..bc3dee0 100644
--- a/libedataserver/e-data-server-util.h
+++ b/libedataserver/e-data-server-util.h
@@ -50,6 +50,8 @@ gint		e_util_utf8_strcasecmp		(const gchar *s1,
 						 const gchar *s2);
 gchar *		e_util_utf8_remove_accents	(const gchar *str);
 gchar *		e_util_utf8_make_valid		(const gchar *str);
+gchar *		e_util_utf8_data_make_valid	(const gchar *data,
+						 gsize bytes);
 const gchar *   e_util_ensure_gdbus_string	(const gchar *str,
 						 gchar **gdbus_str);
 guint64		e_util_gthread_id		(GThread *thread);