Add hb_buffer_reset() and hb_buffer_set_length()
diff --git a/src/hb-buffer.cc b/src/hb-buffer.cc
index 5a44a3f..839a256 100644
--- a/src/hb-buffer.cc
+++ b/src/hb-buffer.cc
@@ -1,6 +1,7 @@
/*
* Copyright (C) 1998-2004 David Turner and Werner Lemberg
* Copyright (C) 2004,2007,2009,2010 Red Hat, Inc.
+ * Copyright (C) 2011 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
@@ -23,6 +24,7 @@
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Red Hat Author(s): Owen Taylor, Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
*/
#include "hb-buffer-private.hh"
@@ -227,6 +229,17 @@
void
+hb_buffer_reset (hb_buffer_t *buffer)
+{
+ hb_buffer_clear (buffer);
+
+ buffer->props = _hb_buffer_nil.props;
+
+ hb_unicode_funcs_destroy (buffer->unicode);
+ buffer->unicode = _hb_buffer_nil.unicode;
+}
+
+void
hb_buffer_clear (hb_buffer_t *buffer)
{
buffer->have_output = FALSE;
@@ -434,6 +447,24 @@
/* Public API again */
+hb_bool_t
+hb_buffer_set_length (hb_buffer_t *buffer,
+ unsigned int length)
+{
+ if (!hb_buffer_ensure (buffer, length))
+ return FALSE;
+
+ /* Wipe the new space */
+ if (length > buffer->len) {
+ memset (buffer->info + buffer->len, 0, sizeof (buffer->info[0]) * (length - buffer->len));
+ if (buffer->have_positions)
+ memset (buffer->pos + buffer->len, 0, sizeof (buffer->pos[0]) * (length - buffer->len));
+ }
+
+ buffer->len = length;
+ return TRUE;
+}
+
unsigned int
hb_buffer_get_length (hb_buffer_t *buffer)
{
