2 * Copyright (C) 2005 David Turner
3 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
4 * Copyright (C) 2007 Red Hat, Inc.
6 * This is part of HarfBuzz, an OpenType Layout engine library.
8 * Permission is hereby granted, without written agreement and without
9 * license or royalty fees, to use, copy, modify, and distribute this
10 * software and its documentation for any purpose, provided that the
11 * above copyright notice and the following two paragraphs appear in
12 * all copies of this software.
14 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
15 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
17 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
20 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
21 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
22 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
24 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
26 * Red Hat Author(s): Behdad Esfahbod
29 #include "harfbuzz-impl.h"
30 #include "harfbuzz-stream-private.h"
35 #define LOG(x) _hb_log x
38 _hb_log( const char* format, ... )
42 va_start( ap, format );
43 vfprintf( stderr, format, ap );
48 #define LOG(x) do {} while (0)
52 _hb_close_stream( HB_Stream stream )
62 _hb_stream_pos( HB_Stream stream )
64 LOG(( "_hb_stream_pos() -> %ld\n", stream->pos ));
70 _hb_stream_seek( HB_Stream stream,
73 HB_Error error = (HB_Error)0;
76 if (pos > stream->size)
77 error = ERR_HB(HB_Err_Read_Error);
79 LOG(( "_hb_stream_seek(%ld) -> 0x%04X\n", pos, error ));
85 _hb_stream_frame_enter( HB_Stream stream,
88 HB_Error error = HB_Err_Ok;
90 /* check new position, watch for overflow */
91 if (HB_UNLIKELY (stream->pos + count > stream->size ||
92 stream->pos + count < stream->pos))
94 error = ERR_HB(HB_Err_Read_Error);
99 stream->cursor = stream->base + stream->pos;
100 stream->pos += count;
103 LOG(( "_hb_stream_frame_enter(%ld) -> 0x%04X\n", count, error ));
109 _hb_stream_frame_exit( HB_Stream stream )
111 stream->cursor = NULL;
113 LOG(( "_hb_stream_frame_exit()\n" ));