size_t ReplaceSubstr(Wtroka& str, const TWtringBuf& from, const TWtringBuf& to)
{
size_t count = 0;
size_t pos = str.off(TCharTraits<wchar16>::Find(~str, +str, ~from, +from));
while (pos != Wtroka::npos) {
str.replace(pos, +from, ~to, 0, Wtroka::npos, +to);
++count;
size_t next = pos + to.size();
pos = str.off(TCharTraits<wchar16>::Find(~str + next, +str - next, ~from, +from));
}
return count;
}
void Collapse(Wtroka& w) {
size_t len = w.size();
for (size_t start = 0; start < len; ++start)
{
size_t n = 0;
for (; start + n < len; ++n)
{
if (!IsWhitespace(w[start + n]))
break;
}
if (n > 1 || (n == 1 && w[start] != ' ')) {
w.replace(start, n, 1, ' ');
len = w.size();
}
}
}