53bf5c497f
- Add LICENSES directory - Download additional licenses used - Add .reuse directory - Add doc about SPDX/reuse Co-authored-by: Florian Märkl <info@florianmaerkl.de>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
// SPDX-FileCopyrightText: 2017-2020 pancake <pancake@nopcode.org>
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// SPDX-FileCopyrightText: 2017-2020 crowell <crowell@bu.edu>
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// SPDX-License-Identifier: LGPL-3.0-only
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#include <rz_util.h>
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#define BITMAP_TEST 0
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#define BITWORD_BITS (sizeof(RBitword) * 8)
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#define BITWORD_BITS_MASK (BITWORD_BITS - 1)
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#define BITWORD_MULT(bit) (((bit) + (BITWORD_BITS_MASK)) & ~(BITWORD_BITS_MASK))
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#define BITWORD_TEST(x, y) (((x) >> (y)) & 1)
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#define BITMAP_WORD_COUNT(bit) (BITWORD_MULT(bit) >> BITWORD_BITS_SHIFT)
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RZ_API RzBitmap *rz_bitmap_new(size_t len) {
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RzBitmap *b = RZ_NEW0(RzBitmap);
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if (!b) {
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return NULL;
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}
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b->length = len;
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b->bitmap = calloc(BITMAP_WORD_COUNT(len), sizeof(RBitword));
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return b;
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}
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RZ_API void rz_bitmap_set_bytes(RzBitmap *b, const ut8 *buf, int len) {
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if (b->length < len) {
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len = b->length;
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}
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memcpy(b->bitmap, buf, len);
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}
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RZ_API void rz_bitmap_free(RzBitmap *b) {
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free(b->bitmap);
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free(b);
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}
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RZ_API void rz_bitmap_set(RzBitmap *b, size_t bit) {
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if (bit < b->length) {
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b->bitmap[(bit >> BITWORD_BITS_SHIFT)] |=
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((RBitword)1 << (bit & BITWORD_BITS_MASK));
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}
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}
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RZ_API void rz_bitmap_unset(RzBitmap *b, size_t bit) {
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if (bit < b->length) {
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b->bitmap[(bit >> BITWORD_BITS_SHIFT)] &=
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~((RBitword)1 << (bit & BITWORD_BITS_MASK));
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}
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}
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RZ_API int rz_bitmap_test(RzBitmap *b, size_t bit) {
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if (bit < b->length) {
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RBitword bword = b->bitmap[(bit >> BITWORD_BITS_SHIFT)];
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return BITWORD_TEST(bword, (bit & BITWORD_BITS_MASK));
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}
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return -1;
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}
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