first

rt-thread/components/utilities/libadt/bitmap/SConscript

@@ -0,0 +1,9 @@
+from building import *
+
+cwd     = GetCurrentDir()
+src     = list()
+CPPPATH = [cwd]
+group   = []
+
+group = DefineGroup('LIBADT', src, depend = ['RT_USING_ADT_BITMAP'], CPPPATH = CPPPATH)
+Return('group')

rt-thread/components/utilities/libadt/bitmap/bitmap.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-6-27      GuEe-GUI     first version
+ */
+
+#ifndef __UTIL_BITMAP_H__
+#define __UTIL_BITMAP_H__
+
+#include <rtdef.h>
+
+typedef rt_ubase_t rt_bitmap_t;
+
+#define RT_BITMAP_BITS_MIN              (sizeof(rt_bitmap_t) * 8)
+#define RT_BITMAP_LEN(bits)             (((bits) + (RT_BITMAP_BITS_MIN) - 1) / (RT_BITMAP_BITS_MIN))
+#define RT_BITMAP_BIT_LEN(nr)           (nr * RT_BITMAP_BITS_MIN)
+#define RT_BITMAP_DECLARE(name, bits)   rt_bitmap_t name[RT_BITMAP_LEN(bits)]
+
+rt_inline void rt_bitmap_set_bit(rt_bitmap_t *bitmap, rt_uint32_t bit)
+{
+    bitmap[bit / RT_BITMAP_BITS_MIN] |= (1UL << (bit & (RT_BITMAP_BITS_MIN - 1)));
+}
+
+rt_inline rt_bool_t rt_bitmap_test_bit(rt_bitmap_t *bitmap, rt_uint32_t bit)
+{
+    return !!(bitmap[bit / RT_BITMAP_BITS_MIN] & (1UL << (bit & (RT_BITMAP_BITS_MIN - 1))));
+}
+
+rt_inline void rt_bitmap_clear_bit(rt_bitmap_t *bitmap, rt_uint32_t bit)
+{
+    bitmap[bit / RT_BITMAP_BITS_MIN] &= ~(1UL << (bit & (RT_BITMAP_BITS_MIN - 1)));
+}
+
+rt_inline rt_size_t rt_bitmap_next_set_bit(rt_bitmap_t *bitmap, rt_size_t start, rt_size_t limit)
+{
+    rt_size_t bit;
+
+    for (bit = start; bit < limit && !rt_bitmap_test_bit(bitmap, bit); ++bit)
+    {
+    }
+
+    return bit;
+}
+
+rt_inline rt_size_t rt_bitmap_next_clear_bit(rt_bitmap_t *bitmap, rt_size_t start, rt_size_t limit)
+{
+    rt_size_t bit;
+
+    for (bit = start; bit < limit && rt_bitmap_test_bit(bitmap, bit); ++bit)
+    {
+    }
+
+    return bit;
+}
+
+#define rt_bitmap_for_each_bit_from(state, bitmap, from, bit, limit)        \
+    for ((bit) = rt_bitmap_next_##state##_bit((bitmap), (from), (limit));   \
+         (bit) < (limit);                                                   \
+         (bit) = rt_bitmap_next_##state##_bit((bitmap), (bit + 1), (limit)))
+
+#define rt_bitmap_for_each_set_bit_from(bitmap, from, bit, limit) \
+    rt_bitmap_for_each_bit_from(set, bitmap, from, bit, limit)
+
+#define rt_bitmap_for_each_set_bit(bitmap, bit, limit) \
+    rt_bitmap_for_each_set_bit_from(bitmap, 0, bit, limit)
+
+#define rt_bitmap_for_each_clear_bit_from(bitmap, from, bit, limit) \
+    rt_bitmap_for_each_bit_from(clear, bitmap, from, bit, limit)
+
+#define rt_bitmap_for_each_clear_bit(bitmap, bit, limit) \
+    rt_bitmap_for_each_clear_bit_from(bitmap, 0, bit, limit)
+
+#endif /* __UTIL_BITMAP_H__ */