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Avoid triggering undefined behaviour in base_uint<BITS>::bits()

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practicalswift
2018-10-18 11:17:05 +02:00
parent 9c5f0d542d
commit 96f6dc9fc5
1 changed files with 1 additions and 1 deletions
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2
src/arith_uint256.cpp
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@@ -176,7 +176,7 @@ unsigned int base_uint<BITS>::bits() const
for (int pos = WIDTH - 1; pos >= 0; pos--) { for (int pos = WIDTH - 1; pos >= 0; pos--) {
if (pn[pos]) { if (pn[pos]) {
for (int nbits = 31; nbits > 0; nbits--) { for (int nbits = 31; nbits > 0; nbits--) {
if (pn[pos] & 1 << nbits) if (pn[pos] & 1U << nbits)
return 32 * pos + nbits + 1; return 32 * pos + nbits + 1;
} }
return 32 * pos + 1; return 32 * pos + 1;