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#ifndef UTIL_ERSATZ_PROGRESS_H
#define UTIL_ERSATZ_PROGRESS_H
#include <iostream>
#include <string>
#include <stdint.h>
// Ersatz version of boost::progress so core language model doesn't depend on
// boost. Also adds option to print nothing.
namespace util {
extern const char kProgressBanner[];
class ErsatzProgress {
public:
// No output.
ErsatzProgress();
// Null means no output. The null value is useful for passing along the ostream pointer from another caller.
explicit ErsatzProgress(uint64_t complete, std::ostream *to = &std::cerr, const std::string &message = "");
#if __cplusplus >= 201103L
ErsatzProgress(ErsatzProgress &&from) noexcept : current_(from.current_), next_(from.next_), complete_(from.complete_), stones_written_(from.stones_written_), out_(from.out_) {
from.out_ = nullptr;
from.next_ = (uint64_t)-1;
}
#endif
~ErsatzProgress();
ErsatzProgress &operator++() {
if (++current_ >= next_) Milestone();
return *this;
}
ErsatzProgress &operator+=(uint64_t amount) {
if ((current_ += amount) >= next_) Milestone();
return *this;
}
void Set(uint64_t to) {
if ((current_ = to) >= next_) Milestone();
}
void Finished() {
Set(complete_);
}
private:
void Milestone();
uint64_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_H
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