[buffer] Minor

diff --git a/src/hb-buffer-serialize.cc b/src/hb-buffer-serialize.cc
index b956116..bd23208 100644 (file)
--- a/src/hb-buffer-serialize.cc
+++ b/src/hb-buffer-serialize.cc
@@ -202,13 +202,17 @@ hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
                            unsigned int end,
                            char *buf,
                            unsigned int buf_size,
-                           unsigned int *buf_consumed,
+                           unsigned int *buf_consumed, /* May be NULL */
                            hb_font_t *font, /* May be NULL */
                            hb_buffer_serialize_format_t format,
                            hb_buffer_serialize_flags_t flags)
 {
   assert (start <= end && end <= buffer->len);
 
+  unsigned int sconsumed;
+  if (!buf_consumed)
+    buf_consumed = &sconsumed;
+
   *buf_consumed = 0;
 
   assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
@@ -242,8 +246,8 @@ hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
 hb_bool_t
 hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
                              const char *buf,
-                             unsigned int buf_len,
-                             unsigned int *buf_consumed,
+                             unsigned int buf_len, /* -1 means nul-terminated */
+                             unsigned int *buf_consumed, /* May be NULL */
                              hb_font_t *font, /* May be NULL */
                              hb_buffer_serialize_format_t format)
 {

diff --git a/src/hb-buffer.h b/src/hb-buffer.h
index 5386e36..d2d17a5 100644 (file)
--- a/src/hb-buffer.h
+++ b/src/hb-buffer.h
@@ -304,7 +304,7 @@ hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
                            unsigned int end,
                            char *buf,
                            unsigned int buf_size,
-                           unsigned int *buf_consumed,
+                           unsigned int *buf_consumed, /* May be NULL */
                            hb_font_t *font, /* May be NULL */
                            hb_buffer_serialize_format_t format,
                            hb_buffer_serialize_flags_t flags);
@@ -313,7 +313,7 @@ hb_bool_t
 hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
                              const char *buf,
                              unsigned int buf_len,
-                             unsigned int *buf_consumed,
+                             unsigned int *buf_consumed, /* May be NULL */
                              hb_font_t *font, /* May be NULL */
                              hb_buffer_serialize_format_t format);