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5e48458dae
* pfb 3b2b10b foo bar cow * Integrate with bit editor via '=' * Handle '=' in visual esil debugger * Add tests and ascii-art output * Handle bitvalue boundaries up to 64bits
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/* radare - LGPL - Copyright 2017-2020 - pancake, crowell */
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#include <r_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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R_API RBitmap *r_bitmap_new(size_t len) {
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RBitmap *b = R_NEW0 (RBitmap);
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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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R_API void r_bitmap_set_bytes(RBitmap *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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R_API void r_bitmap_free(RBitmap *b) {
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free (b->bitmap);
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free (b);
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}
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R_API void r_bitmap_set(RBitmap *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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R_API void r_bitmap_unset(RBitmap *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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R_API int r_bitmap_test(RBitmap *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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