Bit set.

diff --git a/src/mesa/main/bitset.h b/src/mesa/main/bitset.h
new file mode 100644 (file)
index 0000000..1fd548b
--- /dev/null
+++ b/src/mesa/main/bitset.h
@@ -0,0 +1,72 @@
+/*\r
+ * Mesa 3-D graphics library\r
+ * Version:  6.5\r
+ *\r
+ * Copyright (C) 2006  Brian Paul   All Rights Reserved.\r
+ *\r
+ * Permission is hereby granted, free of charge, to any person obtaining a\r
+ * copy of this software and associated documentation files (the "Software"),\r
+ * to deal in the Software without restriction, including without limitation\r
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,\r
+ * and/or sell copies of the Software, and to permit persons to whom the\r
+ * Software is furnished to do so, subject to the following conditions:\r
+ *\r
+ * The above copyright notice and this permission notice shall be included\r
+ * in all copies or substantial portions of the Software.\r
+ *\r
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS\r
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL\r
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN\r
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
+ */\r
+\r
+/**\r
+ * \file bitset.h\r
+ * \brief Bitset of arbitrary size definitions.\r
+ * \author Michal Krol\r
+ */\r
+\r
+#define BITSET_WORD GLuint\r
+#define BITSET_WORDBITS (sizeof (BITSET_WORD) * 8)\r
+\r
+/* bitset declarations\r
+ */\r
+#define BITSET_DECLARE(name, size) \\r
+   BITSET_WORD name[((size) + BITSET_WORDBITS - 1) / BITSET_WORDBITS]\r
+\r
+/* bitset operations\r
+ */\r
+#define BITSET_COPY(x, y) _mesa_memcpy( (x), (y), sizeof (x) )\r
+#define BITSET_EQUAL(x, y) (_mesa_memcmp( (x), (y), sizeof (x) ) == 0)\r
+#define BITSET_ZERO(x) _mesa_memset( (x), 0, sizeof (x) )\r
+#define BITSET_ONES(x) _mesa_memset( (x), 0xff, sizeof (x) )\r
+\r
+#define BITSET_BITWORD(b) ((b) / BITSET_WORDBITS)\r
+#define BITSET_BIT(b) (1 << ((b) % BITSET_WORDBITS))\r
+\r
+/* single bit operations\r
+ */\r
+#define BITSET_TEST(x, b) ((x)[BITSET_BITWORD(b)] & BITSET_BIT(b))\r
+#define BITSET_SET(x, b) ((x)[BITSET_BITWORD(b)] |= BITSET_BIT(b))\r
+#define BITSET_CLEAR(x, b) ((x)[BITSET_BITWORD(b)] &= ~BITSET_BIT(b))\r
+\r
+#define BITSET_MASK(b) ((b) == BITSET_WORDBITS ? ~0 : BITSET_BIT(b) - 1)\r
+#define BITSET_RANGE(b, e) (BITSET_MASK((e) + 1) & ~BITSET_MASK(b))\r
+\r
+/* bit range operations\r
+ */\r
+#define BITSET_TEST_RANGE(x, b, e) \\r
+   (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \\r
+   ((x)[BITSET_BITWORD(b)] & BITSET_RANGE(b, e)) : \\r
+   (assert (!"BITSET_TEST_RANGE: bit range crosses word boundary"), 0))\r
+#define BITSET_SET_RANGE(x, b, e) \\r
+   (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \\r
+   ((x)[BITSET_BITWORD(b)] |= BITSET_RANGE(b, e)) : \\r
+   (assert (!"BITSET_SET_RANGE: bit range crosses word boundary"), 0))\r
+#define BITSET_CLEAR_RANGE(x, b, e) \\r
+   (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \\r
+   ((x)[BITSET_BITWORD(b)] &= ~BITSET_RANGE(b, e)) : \\r
+   (assert (!"BITSET_CLEAR_RANGE: bit range crosses word boundary"), 0))\r
+\r