Add a function for checking if a string is pure ASCII.
https://bugzilla.gnome.org/show_bug.cgi?id=709753
g_printf_string_upper_bound
<SUBSECTION>
+g_str_is_ascii
g_ascii_isalnum
g_ascii_isalpha
g_ascii_iscntrl
}
/**
+ * g_str_is_ascii:
+ * @string: a string.
+ *
+ * Determines if a string is pure ASCII. A string is pure ASCII if it
+ * contains no bytes with the high bit set.
+ *
+ * Returns: %TRUE if @string is ascii
+ *
+ * Since: 2.40
+ **/
+gboolean
+g_str_is_ascii (const gchar *string)
+{
+ gint i;
+
+ for (i = 0; string[i]; i++)
+ if (string[i] & 0x80)
+ return FALSE;
+
+ return TRUE;
+}
+
+/**
* g_strdown:
* @string: the string to convert.
*
gchar* g_ascii_strup (const gchar *str,
gssize len) G_GNUC_MALLOC;
+GLIB_AVAILABLE_IN_2_40
+gboolean g_str_is_ascii (const gchar *str);
GLIB_DEPRECATED
gint g_strcasecmp (const gchar *s1,