Method getc

externals/picojson/picojson.h:661–674

  input(const Iter &first, const Iter &last) : cur_(first), end_(last), consumed_(false), line_(1) {
  }
  int getc() {
    if (consumed_) {
      if (*cur_ == '\n') {
        ++line_;
      }
      ++cur_;
    }
    if (cur_ == end_) {
      consumed_ = false;
      return -1;
    }
    consumed_ = true;
    return *cur_ & 0xff;
  }
  void ungetc() {
    consumed_ = false;
  }