Bug 596614 - Pango application receives SIGSEGV on pasting text with U+202E

Fixed all modules to reverse glyphs if run is rtl.  Except for Hangul module.
Fixed pango_shape() to detect that, warn, and reverse.

1 files changed, 25 insertions, 1 deletions

diff --git a/pango/pango-impl-utils.h b/pango/pango-impl-utils.h
index 3ef3a0c4..6d6c8ff2 100644
--- a/pango/pango-impl-utils.h
+++ b/pango/pango-impl-utils.h
@@ -150,7 +150,31 @@ pango_utf8_strlen (const gchar *p, gssize max)
   return len;
 }
 
+
+/* To be made public at some point */
+
+static G_GNUC_UNUSED void
+pango_glyph_string_reverse_range (PangoGlyphString *glyphs,
+				  int start, int end)
+{
+  int i, j;
+
+  for (i = start, j = end - 1; i < j; i++, j--)
+    {
+      PangoGlyphInfo glyph_info;
+      gint log_cluster;
+
+      glyph_info = glyphs->glyphs[i];
+      glyphs->glyphs[i] = glyphs->glyphs[j];
+      glyphs->glyphs[j] = glyph_info;
+
+      log_cluster = glyphs->log_clusters[i];
+      glyphs->log_clusters[i] = glyphs->log_clusters[j];
+      glyphs->log_clusters[j] = log_cluster;
+    }
+}
+
+
 G_END_DECLS
 
 #endif /* __PANGO_IMPL_UTILS_H__ */
-