Method capture

src/output.cpp:566–616

get a group capture's string pointer and size specified by %[ARG] as arg, if any

// get a group capture's string pointer and size specified by %[ARG] as arg, if any
std::pair<const char*,size_t> Output::capture(reflex::AbstractMatcher *matcher, const char *arg)
{
  if (arg != NULL)
  {
    while (true)
    {
      const char *bar = strchr(arg, '|');
      const char *end = strchr(arg, ']');

      if (end == NULL)
        break;

      if (bar == NULL || bar > end)
        bar = end;

      if (isdigit(static_cast<unsigned char>(*arg)))
      {
        size_t index = strtoul(arg, NULL, 10);

        if (index == 0 || *bar == ']')
          return (*matcher)[index];

        std::pair<size_t,const char*> id = matcher->group_id();

        while (id.first != 0 && id.first != index)
          id = matcher->group_next_id();

        if (id.first == index)
          return (*matcher)[index];
      }
      else
      {
        std::pair<size_t,const char*> id = matcher->group_id();

        while (id.first != 0
            && (id.second == NULL || strncmp(id.second, arg, bar - arg) != 0 || id.second[bar - arg] != '\0'))
          id = matcher->group_next_id();

        if (id.first != 0)
          return (*matcher)[id.first];
      }

      if (*bar == ']')
        break;

      arg = bar + 1;
    }
  }

  return std::pair<const char*,size_t>(NULL, 0);
}

// output format with option --format-begin and --format-end
void Output::format(const char *format, size_t matches)