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updated undefined behavior in accordance with zcash remedy rex4539 #4056

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Charles
2020-03-29 03:01:46 -04:00
parent 2e51538df8
commit 54ec0d0994
1 changed files with 3 additions and 2 deletions
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5
src/arith_uint256.cpp
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@@ -193,9 +193,10 @@ 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 bits = 31; bits > 0; bits--) { for (size_t bits = 31; bits > 0; bits--) {
if (pn[pos] & 1 << bits) if (pn[pos] & (1U << bits)) {
return 32 * pos + bits + 1; return 32 * pos + bits + 1;
}
} }
return 32 * pos + 1; return 32 * pos + 1;
} }