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Cast to unsigned char before calling toupper() (#648)

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Davis Vaughan 2021-02-24 12:49:46 -05:00 committed by GitHub
parent bf79dd5a81
commit 1c285d6545
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1 changed files with 2 additions and 2 deletions
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include/date/date.h
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@ -4779,7 +4779,7 @@ scan_keyword(std::basic_istream<CharT, Traits>& is, FwdIter kb, FwdIter ke)
is.setstate(std::ios::eofbit); is.setstate(std::ios::eofbit);
break; break;
} }
auto c = static_cast<char>(toupper(ic)); auto c = static_cast<char>(toupper(static_cast<unsigned char>(ic)));
bool consume = false; bool consume = false;
// For each keyword which might match, see if the indx character is c // For each keyword which might match, see if the indx character is c
// If a match if found, consume c // If a match if found, consume c
@ -4792,7 +4792,7 @@ scan_keyword(std::basic_istream<CharT, Traits>& is, FwdIter kb, FwdIter ke)
{ {
if (*st == might_match) if (*st == might_match)
{ {
if (c == static_cast<char>(toupper((*ky)[indx]))) if (c == static_cast<char>(toupper(static_cast<unsigned char>((*ky)[indx]))))
{ {
consume = true; consume = true;
if (ky->size() == indx+1) if (ky->size() == indx+1)