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28 lines
758 B
C
28 lines
758 B
C
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/*
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* Copyright (C) 2021 Intel Corporation. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*/
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#include "bh_bitmap.h"
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bh_bitmap *
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bh_bitmap_new(uintptr_t begin_index, unsigned bitnum)
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{
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bh_bitmap *bitmap;
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uint32 bitmap_size = (bitnum + 7) / 8;
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uint32 total_size = offsetof(bh_bitmap, map) + bitmap_size;
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if (bitnum > UINT32_MAX - 7 || total_size < offsetof(bh_bitmap, map)
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|| (total_size - offsetof(bh_bitmap, map)) != bitmap_size) {
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return NULL; /* integer overflow */
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}
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if ((bitmap = BH_MALLOC(total_size)) != NULL) {
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memset(bitmap, 0, total_size);
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bitmap->begin_index = begin_index;
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bitmap->end_index = begin_index + bitnum;
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}
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return bitmap;
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}
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