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lib: add copy function for bitfield_t

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Add a function to copy a bitfield_t structure.

Add a ‘void *’ to ‘word_t *’ converstion in bf_init() to avoid the
following error:

> ./lib/bitfield.h: In function ‘bf_copy’:
> ./lib/bitfield.h:75:12: error: request for implicit conversion from ‘void *’ to ‘word_t *’ {aka ‘unsigned int *’} not permitted in C++ [-Werror=c++-compat]
>    (v).data = XCALLOC(MTYPE_BITFIELD, ((v).m * sizeof(word_t)));  \
>             ^
> ./lib/bitfield.h:278:2: note: in expansion of macro ‘bf_init’
>   bf_init(dst, WORD_SIZE * (src.m - 1));
>   ^~~~~~~

Signed-off-by: Hiroki Shirokura <hiroki.shirokura@linecorp.com>
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
This commit is contained in:
Hiroki Shirokura 2021-12-30 13:13:37 +00:00 committed by Louis Scalbert
parent 8300f2f56c
commit c86a325285
1 changed files with 15 additions and 1 deletions
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16
lib/bitfield.h
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@ -72,7 +72,8 @@ DECLARE_MTYPE(BITFIELD);
do { \
(v).n = 0; \
(v).m = ((N) / WORD_SIZE + 1); \
(v).data = XCALLOC(MTYPE_BITFIELD, ((v).m * sizeof(word_t))); \
(v).data = (word_t *)XCALLOC(MTYPE_BITFIELD, \
((v).m * sizeof(word_t))); \
} while (0)
/**
@ -268,6 +269,19 @@ static inline unsigned int bf_find_next_set_bit(bitfield_t v,
(v).data = NULL; \
} while (0)
static inline bitfield_t bf_copy(bitfield_t src)
{
bitfield_t dst;
assert(bf_is_inited(src));
bf_init(dst, WORD_SIZE * (src.m - 1));
for (size_t i = 0; i < src.m; i++)
dst.data[i] = src.data[i];
dst.n = src.n;
return dst;
}
#ifdef __cplusplus
}
#endif