Function atoilw

Libraries/unrar/unicode.cpp:555–574

int64 atoilw(const wchar *s)
{
  bool sign=false;
  if (*s=='-') // We do use signed integers here, for example, in GUI SFX.
  {
    s++;
    sign=true;
  }
  // Use unsigned type here, since long string can overflow the variable
  // and signed integer overflow is undefined behavior in C++.
  uint64 n=0;
  while (*s>='0' && *s<='9')
  {
    n=n*10+(*s-'0');
    s++;
  }
  // Check int64(n)>=0 to avoid the signed overflow with undefined behavior
  // when negating 0x8000000000000000.
  return sign && int64(n)>=0 ? -int64(n) : int64(n);
}


#ifdef DBCS_SUPPORTED