2010-09-28 20:26:55 +04:00
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#include "util/ersatz_progress.hh"
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2010-09-15 01:33:11 +04:00
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#include <algorithm>
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#include <ostream>
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#include <limits>
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#include <string>
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namespace util {
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namespace { const unsigned char kWidth = 100; }
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ErsatzProgress::ErsatzProgress() : current_(0), next_(std::numeric_limits<std::size_t>::max()), complete_(next_), out_(NULL) {}
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ErsatzProgress::~ErsatzProgress() {
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if (!out_) return;
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for (; stones_written_ < kWidth; ++stones_written_) {
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(*out_) << '*';
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}
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*out_ << '\n';
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}
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ErsatzProgress::ErsatzProgress(std::ostream *to, const std::string &message, std::size_t complete)
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: current_(0), next_(complete / kWidth), complete_(complete), stones_written_(0), out_(to) {
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if (!out_) {
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next_ = std::numeric_limits<std::size_t>::max();
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return;
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}
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*out_ << message << "\n----5---10---15---20---25---30---35---40---45---50---55---60---65---70---75---80---85---90---95--100\n";
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}
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void ErsatzProgress::Milestone() {
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if (!out_) { current_ = 0; return; }
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if (!complete_) return;
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unsigned char stone = std::min(static_cast<std::size_t>(kWidth), (current_ * kWidth) / complete_);
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for (; stones_written_ < stone; ++stones_written_) {
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(*out_) << '*';
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}
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if (current_ >= complete_) {
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next_ = std::numeric_limits<std::size_t>::max();
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} else {
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next_ = std::max(next_, (stone * complete_) / kWidth);
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}
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}
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} // namespace util
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