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/*****************************************************************************
*
* grail - Gesture Recognition And Instantiation Library
*
* Copyright (C) 2010-2011 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
****************************************************************************/
#ifndef _GRAIL_BITS_H
#define _GRAIL_BITS_H
#ifdef __cplusplus
extern "C" {
#endif
/* Macros that set symbol visibilities in shared libraries properly.
* Adapted from http://gcc.gnu.org/wiki/Visibility
*/
#if defined _WIN32 || defined __CYGWIN__
#ifdef BUILDING_GRAIL
#define GRAIL_PUBLIC __declspec(dllexport)
#else
#define GRAIL_PUBLIC __declspec(dllimport)
#endif
#define GRAIL_PRIVATE
#else
#if defined __GNUC__
#define GRAIL_PUBLIC __attribute__ ((visibility("default")))
#define GRAIL_PRIVATE __attribute__ ((visibility("hidden")))
#else
#error "Unsupported compiler."
#endif
#endif
typedef unsigned char grail_mask_t;
static inline void grail_mask_set(grail_mask_t *mask, int i)
{
mask[i >> 3] |= (1 << (i & 7));
}
static inline void grail_mask_clear(grail_mask_t *mask, int i)
{
mask[i >> 3] &= ~(1 << (i & 7));
}
static inline void grail_mask_modify(grail_mask_t *mask, int i, int v)
{
if (v)
grail_mask_set(mask, i);
else
grail_mask_clear(mask, i);
}
static inline int grail_mask_get(const grail_mask_t *mask, int i)
{
return (mask[i >> 3] >> (i & 7)) & 1;
}
void GRAIL_PUBLIC grail_mask_set_mask(grail_mask_t *a, const grail_mask_t *b,
int bytes);
void GRAIL_PUBLIC grail_mask_clear_mask(grail_mask_t *a, const grail_mask_t *b,
int bytes);
int GRAIL_PUBLIC grail_mask_count(const grail_mask_t *mask, int bytes);
int GRAIL_PUBLIC grail_mask_get_first(const grail_mask_t *mask, int bytes);
int GRAIL_PUBLIC grail_mask_get_next(int i, const grail_mask_t *mask,
int bytes);
#define grail_mask_foreach(i, mask, bytes) \
for (i = grail_mask_get_first(mask, bytes); \
i >= 0; \
i = grail_mask_get_next(i, mask, bytes))
#ifdef __cplusplus
}
#endif
#endif
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