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in bitfield.c's countRange() function, make walk_end an invariant

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Jordan Lee 2012-12-09 18:24:57 +00:00
parent 8a2061f2cf
commit 3d5b43b5b4
1 changed files with 2 additions and 1 deletions
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3
libtransmission/bitfield.c
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@ -90,6 +90,7 @@ countRange (const tr_bitfield * b, size_t begin, size_t end)
{ {
size_t i; size_t i;
uint8_t val; uint8_t val;
const size_t walk_end = MIN (b->alloc_count, last_byte);
/* first byte */ /* first byte */
i = begin - (first_byte * 8); i = begin - (first_byte * 8);
@ -99,7 +100,7 @@ countRange (const tr_bitfield * b, size_t begin, size_t end)
ret += trueBitCount[val]; ret += trueBitCount[val];
/* middle bytes */ /* middle bytes */
for (i=first_byte+1; i<b->alloc_count && i<last_byte; ++i) for (i=first_byte+1; i<walk_end; ++i)
ret += trueBitCount[b->bits[i]]; ret += trueBitCount[b->bits[i]];
/* last byte */ /* last byte */