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improve buf_set_ones

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Use memset instead of loop. Improve types, using void * and unsigned.
This commit is contained in:
Zachary T Welch 2009-11-14 10:41:35 -08:00
parent d09e308130
commit d8d8c5d8c3
2 changed files with 11 additions and 10 deletions
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18
src/helper/binarybuffer.c
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@ -113,17 +113,17 @@ bool buf_cmp_mask(const void *_buf1, const void *_buf2,
}
uint8_t* buf_set_ones(uint8_t *buf, int count)
void* buf_set_ones(void *_buf, unsigned size)
{
for (unsigned i = 0, num_bytes = CEIL(count, 8); i < num_bytes; i++)
{
if (count >= 8)
buf[i] = 0xff;
else
buf[i] = (1 << count) - 1;
uint8_t *buf = _buf;
if (!buf)
return NULL;
count -= 8;
}
memset(buf, 0xff, size / 8);
unsigned trailing_bits = size % 8;
if (trailing_bits)
buf[size / 8] = (1 << trailing_bits) - 1;
return buf;
}

3
src/helper/binarybuffer.h
View File

@ -76,7 +76,8 @@ bool buf_cmp_mask(const void *buf1, const void *buf2,
void* buf_cpy(const void *from, void *to, unsigned size);
uint8_t* buf_set_ones(uint8_t *buf, int count);
void* buf_set_ones(void *buf, unsigned count);
uint8_t* buf_set_buf(const uint8_t *src, int src_start,
uint8_t *dst, int dst_start, int len);