static inline IntegralType toIntegralType(const CharType* data, size_t length, bool* ok, int base)
{
static const IntegralType integralMax = std::numeric_limits<IntegralType>::max();
static const bool isSigned = std::numeric_limits<IntegralType>::is_signed;
const IntegralType maxMultiplier = integralMax / base;
IntegralType value = 0;
bool isOk = false;
bool isNegative = false;
if (!data)
goto bye;
// skip leading whitespace
while (length && isSpaceOrNewline(*data)) {
--length;
++data;
}
if (isSigned && length && *data == '-') {
--length;
++data;
isNegative = true;
} else if (length && *data == '+') {
--length;
++data;
}
if (!length || !isCharacterAllowedInBase(*data, base))
goto bye;
while (length && isCharacterAllowedInBase(*data, base)) {
--length;
IntegralType digitValue;
CharType c = *data;
if (isASCIIDigit(c))
digitValue = c - '0';
else if (c >= 'a')
digitValue = c - 'a' + 10;
else
digitValue = c - 'A' + 10;
if (value > maxMultiplier || (value == maxMultiplier && digitValue > (integralMax % base) + isNegative))
goto bye;
value = base * value + digitValue;
++data;
}
#if COMPILER(MSVC)
#pragma warning(push, 0)
#pragma warning(disable:4146)
#endif
if (isNegative)
value = -value;
#if COMPILER(MSVC)
#pragma warning(pop)
#endif
// skip trailing space
while (length && isSpaceOrNewline(*data)) {
--length;
++data;
}
if (!length)
isOk = true;
bye:
if (ok)
*ok = isOk;
return isOk ? value : 0;
}
void Parser::skipWS()
{
while (m_nextPos < m_data.length() && isSpaceOrNewline(m_data[m_nextPos]))
++m_nextPos;
}
static bool IsWhiteSpaceOrPunctuation(UChar c)
{
return isSpaceOrNewline(c) || WTF::Unicode::isPunct(c);
}