re2_regex.C

#include "re2_regex.H"
#include "args.H"
#include "error.H"

#include <re2/re2.h>


// -----------------------------------------------------------------------------

Regex::Regex(String const & r, std::string const &)
{
    // Compile regex
    re2::RE2::Options opts;
    opts.set_case_sensitive(!r.noCase());
    opts.set_log_errors(false);
    _rx.reset(new re2::RE2{r, opts});
    _valid = _rx->ok();
    if (!_valid) {
        throw Error{_rx->error()};
    }
}

Regex::~Regex() = default;

bool Regex::match(std::string const & s, Match * pmatch) const
{
    if (!_rx) return false;
    re2::StringPiece const str{s};
    re2::StringPiece substr;
    auto const result = _rx->Match(str, 0, str.size(), re2::RE2::UNANCHORED, &substr, 1);
    if (result && pmatch) {
        pmatch->set_pos_and_len(substr.data() - str.data(), substr.size());
    }
    return result;
}