internal unsafe static bool IsValid(char* name, ushort pos, ref int returnedEnd, ref bool notCanonical, bool notImplicitFile) {
char *curPos = name + pos;
char *newPos = curPos;
char *end = name + returnedEnd;
for (; newPos < end; ++newPos) {
char ch = *newPos;
if (ch == '/' || ch == '\\' || (notImplicitFile && (ch == ':' || ch == '?' || ch == '#'))) {
end = newPos;
break;
}
}
if (end == curPos) {
return false;
}
do {
// Determines whether a string is a valid domain name label. In keeping
// with RFC 1123, section 2.1, the requirement that the first character
// of a label be alphabetic is dropped. Therefore, Domain names are
// formed as:
//
// <label> -> <alphanum> [<alphanum> | <hyphen> | <underscore>] * 62
//find the dot or hit the end
newPos = curPos;
while (newPos < end) {
if (*newPos == '.') break;
++newPos;
}
//check the label start/range
if (curPos == newPos || newPos-curPos > 63 || !IsASCIILetterOrDigit(*curPos++, ref notCanonical)) {
return false;
}
//check the label content
while(curPos < newPos) {
if (!IsValidDomainLabelCharacter(*curPos++, ref notCanonical)) {
return false;
}
}
++curPos;
} while (curPos < end);
returnedEnd = (ushort)(end-name);
return true;
}
// Determines whether a character is a valid letter according to
