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util: Avoid invalid integer negation in ValueFromAmount: make ValueFromAmount(const CAmount& n) well-defined also when n is std::numeric_limits<CAmount>::min()

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practicalswift 2020-11-16 16:44:50 +00:00
parent 7cc75c9ba3
commit 1f05dbd06d
5 changed files with 25 additions and 22 deletions
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17
src/core_write.cpp
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@ -14,17 +14,20 @@
#include <undo.h>
#include <univalue.h>
#include <util/check.h>
#include <util/system.h>
#include <util/strencodings.h>
#include <util/system.h>
UniValue ValueFromAmount(const CAmount& amount)
UniValue ValueFromAmount(const CAmount amount)
{
bool sign = amount < 0;
int64_t n_abs = (sign ? -amount : amount);
int64_t quotient = n_abs / COIN;
int64_t remainder = n_abs % COIN;
static_assert(COIN > 1);
int64_t quotient = amount / COIN;
int64_t remainder = amount % COIN;
if (amount < 0) {
quotient = -quotient;
remainder = -remainder;
}
return UniValue(UniValue::VNUM,
strprintf("%s%d.%08d", sign ? "-" : "", quotient, remainder));
strprintf("%s%d.%08d", amount < 0 ? "-" : "", quotient, remainder));
}
std::string FormatScript(const CScript& script)