bool
ValidateUTF8(const char *p)
{
for (; *p != 0; ++p) {
unsigned char ch = *p;
if (IsASCII(ch))
continue;
if (IsContinuation(ch))
/* continuation without a prefix */
return false;
if (IsLeading1(ch)) {
/* 1 continuation */
if (!IsContinuation(*++p))
return false;
} else if (IsLeading2(ch)) {
/* 2 continuations */
if (!IsContinuation(*++p) || !IsContinuation(*++p))
return false;
} else if (IsLeading3(ch)) {
/* 3 continuations */
if (!IsContinuation(*++p) || !IsContinuation(*++p) ||
!IsContinuation(*++p))
return false;
} else if (IsLeading4(ch)) {
/* 4 continuations */
if (!IsContinuation(*++p) || !IsContinuation(*++p) ||
!IsContinuation(*++p) || !IsContinuation(*++p))
return false;
} else if (IsLeading5(ch)) {
/* 5 continuations */
if (!IsContinuation(*++p) || !IsContinuation(*++p) ||
!IsContinuation(*++p) || !IsContinuation(*++p) ||
!IsContinuation(*++p))
return false;
} else
return false;
}
return true;
}
gcc_pure
bool operator()(const char *p) const {
return IsContinuation(*p) && CheckSequenceUTF8<L-1>()(p + 1);
}
inline bool asio_handler_is_continuation(
wrapped_handler<Dispatcher, Handler, IsContinuation>* this_handler)
{
return IsContinuation()(this_handler->dispatcher_, this_handler->handler_);
}