Adding upstream version 0.6.0.upstream/0.6.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 119 insertions, 0 deletions

diff --git a/src/ck_internal.h b/src/ck_internal.h
new file mode 100644
index 0000000..7aad3d7
--- /dev/null
+++ b/src/ck_internal.h
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2011-2015 Samy Al Bahra.
+ * Copyright 2011 David Joseph.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Several of these are from: http://graphics.stanford.edu/~seander/bithacks.html
+ */
+
+#define CK_INTERNAL_LOG_0 (0xAAAAAAAA)
+#define CK_INTERNAL_LOG_1 (0xCCCCCCCC)
+#define CK_INTERNAL_LOG_2 (0xF0F0F0F0)
+#define CK_INTERNAL_LOG_3 (0xFF00FF00)
+#define CK_INTERNAL_LOG_4 (0xFFFF0000)
+
+CK_CC_INLINE static uint32_t
+ck_internal_log(uint32_t v)
+{
+        uint32_t r = (v & CK_INTERNAL_LOG_0) != 0;
+
+	r |= ((v & CK_INTERNAL_LOG_4) != 0) << 4;
+	r |= ((v & CK_INTERNAL_LOG_3) != 0) << 3;
+	r |= ((v & CK_INTERNAL_LOG_2) != 0) << 2;
+	r |= ((v & CK_INTERNAL_LOG_1) != 0) << 1;
+        return (r);
+}
+
+CK_CC_INLINE static uint32_t
+ck_internal_power_2(uint32_t v)
+{
+
+        --v;
+        v |= v >> 1;
+        v |= v >> 2;
+        v |= v >> 4;
+        v |= v >> 8;
+        v |= v >> 16;
+        return (++v);
+}
+
+CK_CC_INLINE static unsigned long
+ck_internal_max(unsigned long x, unsigned long y)
+{
+
+	return x ^ ((x ^ y) & -(x < y));
+}
+
+CK_CC_INLINE static uint64_t
+ck_internal_max_64(uint64_t x, uint64_t y)
+{
+
+	return x ^ ((x ^ y) & -(x < y));
+}
+
+CK_CC_INLINE static uint32_t
+ck_internal_max_32(uint32_t x, uint32_t y)
+{
+
+	return x ^ ((x ^ y) & -(x < y));
+}
+
+CK_CC_INLINE static unsigned long
+ck_internal_bsf(unsigned long v)
+{
+#if defined(__GNUC__)
+	return __builtin_ffs(v);
+#else
+	unsigned int i;
+	const unsigned int s = sizeof(unsigned long) * 8 - 1;
+
+	for (i = 0; i < s; i++) {
+		if (v & (1UL << (s - i)))
+			return sizeof(unsigned long) * 8 - i;
+	}
+
+	return 1;
+#endif /* !__GNUC__ */
+}
+
+CK_CC_INLINE static uint64_t
+ck_internal_bsf_64(uint64_t v)
+{
+#if defined(__GNUC__)
+	return __builtin_ffs(v);
+#else
+	unsigned int i;
+	const unsigned int s = sizeof(unsigned long) * 8 - 1;
+
+	for (i = 0; i < s; i++) {
+		if (v & (1ULL << (63U - i)))
+			return i;
+	}
+#endif /* !__GNUC__ */
+
+	return 1;
+}
+