Move utility functions to a separate header

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 114 insertions, 0 deletions

diff --git a/libevdev/libevdev-util.h b/libevdev/libevdev-util.h
new file mode 100644
index 0000000..ae24410
--- /dev/null
+++ b/libevdev/libevdev-util.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright © 2013 Red Hat, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#ifndef _UTIL_H_
+#define _UTIL_H_
+
+#include <config.h>
+#include "libevdev-int.h"
+
+static inline int
+bit_is_set(const unsigned long *array, int bit)
+{
+    return !!(array[bit / LONG_BITS] & (1LL << (bit % LONG_BITS)));
+}
+
+static inline void
+set_bit(unsigned long *array, int bit)
+{
+    array[bit / LONG_BITS] |= (1LL << (bit % LONG_BITS));
+}
+
+static inline void
+clear_bit(unsigned long *array, int bit)
+{
+    array[bit / LONG_BITS] &= ~(1LL << (bit % LONG_BITS));
+}
+
+static inline void
+set_bit_state(unsigned long *array, int bit, int state)
+{
+	if (state)
+		set_bit(array, bit);
+	else
+		clear_bit(array, bit);
+}
+
+static unsigned int
+type_to_mask_const(const struct libevdev *dev, unsigned int type, const unsigned long **mask)
+{
+	unsigned int max;
+
+	switch(type) {
+		case EV_ABS:
+			*mask = dev->abs_bits;
+			max = ABS_MAX;
+			break;
+		case EV_REL:
+			*mask = dev->rel_bits;
+			max = REL_MAX;
+			break;
+		case EV_KEY:
+			*mask = dev->key_bits;
+			max = KEY_MAX;
+			break;
+		case EV_LED:
+			*mask = dev->led_bits;
+			max = LED_MAX;
+			break;
+		default:
+		     return 0;
+	}
+
+	return max;
+}
+
+static unsigned int
+type_to_mask(struct libevdev *dev, unsigned int type, unsigned long **mask)
+{
+	unsigned int max;
+
+	switch(type) {
+		case EV_ABS:
+			*mask = dev->abs_bits;
+			max = ABS_MAX;
+			break;
+		case EV_REL:
+			*mask = dev->rel_bits;
+			max = REL_MAX;
+			break;
+		case EV_KEY:
+			*mask = dev->key_bits;
+			max = KEY_MAX;
+			break;
+		case EV_LED:
+			*mask = dev->led_bits;
+			max = LED_MAX;
+			break;
+		default:
+		     return 0;
+	}
+
+	return max;
+}
+
+#endif