Пример #1
0
bool elementPatternMatches(const char* pattern, const HTMLInputElement* inputElement)
{
    WTF::String patternString(pattern);
    if (!inputElement || patternString.isEmpty())
        return false;

    if (inputElement->fastHasAttribute(HTMLNames::patternAttr)) {
        WTF::String patternAttribute = inputElement->fastGetAttribute(HTMLNames::patternAttr);
        if (patternAttribute.startsWith(patternString)) {
            // The pattern is for hexadecimal, make sure nothing else is permitted.

            // Check if it was an exact match.
            if (patternAttribute.length() == patternString.length())
                return true;

            // Check for *
            if (patternAttribute.length() == patternString.length() + 1 && patternAttribute[patternString.length()] == '*')
                return true;

            // Is the regex specifying a character count?
            if (patternAttribute[patternString.length()] != '{' || !patternAttribute.endsWith('}'))
                return false;

            // Make sure the number in the regex is actually a number.
            unsigned count = 0;
            patternString = patternString + "{%d}";
            return (sscanf(patternAttribute.latin1().data(), patternString.latin1().data() + '\0', &count) == 1) && count > 0;
        }
    }
    return false;
}