2 * Copyright (C) 2007,2008,2009 Red Hat, Inc.
4 * This is part of HarfBuzz, an OpenType Layout engine library.
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 * Red Hat Author(s): Behdad Esfahbod
30 #include "hb-common.h"
34 /* Macros to convert to/from BigEndian */
37 #define hb_be_uint16_t GUINT16_TO_BE
38 #define hb_be_int16_t GINT16_TO_BE
39 #define hb_be_uint32_t GUINT32_TO_BE
40 #define hb_be_int32_t GINT32_TO_BE
41 #define hb_be_uint64_t GUINT64_TO_BE
42 #define hb_be_int64_t GINT64_TO_BE
44 #define HB_LIKELY G_LIKELY
45 #define HB_UNLIKELY G_UNLIKELY
46 #define HB_UNUSED(arg) ((arg) = (arg))
47 #define HB_GNUC_UNUSED G_GNUC_UNUSED
51 #include <stdio.h> /* XXX */
58 #define MIN(a,b) ((a) < (b) ? (a) : (b))
65 # define NULL ((void *)0)
77 #define _ASSERT_STATIC1(_line, _cond) typedef int _static_assert_on_line_##_line##_failed[(_cond)?1:-1]
78 #define _ASSERT_STATIC0(_line, _cond) _ASSERT_STATIC1 (_line, (_cond))
79 #define ASSERT_STATIC(_cond) _ASSERT_STATIC0 (__LINE__, (_cond))
81 #define ASSERT_SIZE(_type, _size) ASSERT_STATIC (sizeof (_type) == (_size))
84 /* Return the number of 1 bits in mask.
86 * GCC 3.4 supports a "population count" builtin, which on many targets is
87 * implemented with a single instruction. There is a fallback definition
88 * in libgcc in case a target does not have one, which should be just as
89 * good as the open-coded solution below, (which is "HACKMEM 169").
91 static inline unsigned int
92 _hb_popcount32 (uint32_t mask)
94 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
95 return __builtin_popcount (mask);
99 y = (mask >> 1) &033333333333;
100 y = mask - y - ((y >>1) & 033333333333);
101 return (((y + (y >> 3)) & 030707070707) % 077);
105 #endif /* HB_PRIVATE_H */