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#ifndef UTIL_ERSATZ_PROGRESS__
#define UTIL_ERSATZ_PROGRESS__
#include <iosfwd>
#include <string>
// Ersatz version of boost::progress so core language model doesn't depend on
// boost. Also adds option to print nothing.
namespace util {
class ErsatzProgress {
public:
// No output.
ErsatzProgress();
// Null means no output. The null value is useful for passing along the ostream pointer from another caller.
ErsatzProgress(std::ostream *to, const std::string &message, std::size_t complete);
~ErsatzProgress();
ErsatzProgress &operator++() {
if (++current_ == next_) Milestone();
return *this;
}
ErsatzProgress &operator+=(std::size_t amount) {
if ((current_ += amount) >= next_) Milestone();
return *this;
}
void Set(std::size_t to) {
if ((current_ = to) >= next_) Milestone();
Milestone();
}
private:
void Milestone();
std::size_t current_, next_, complete_;
unsigned char stones_written_;
std::ostream *out_;
// noncopyable
ErsatzProgress(const ErsatzProgress &other);
ErsatzProgress &operator=(const ErsatzProgress &other);
};
} // namespace util
#endif // UTIL_ERSATZ_PROGRESS__
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