#include "word.h"

#include <util/generic/strbuf.h>

namespace NSQLComplete {

bool IsWordBoundary(char ch) { // Is optimized into table lookup by clang
    for (size_t i = 0; i < sizeof(WordBreakCharacters) - 1; ++i) {
        if (WordBreakCharacters[i] == ch) {
            return true;
        }
    }
    return false;
}

size_t LastWordIndex(TStringBuf text) {
    for (auto it = std::rbegin(text); it != std::rend(text); std::advance(it, 1)) {
        if (IsWordBoundary(*it)) {
            return std::distance(it, std::rend(text));
        }
    }
    return 0;
}

TStringBuf LastWord(TStringBuf text) {
    return text.SubStr(LastWordIndex(text));
}

} // namespace NSQLComplete