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#pragma once
#include <string>
#include <fmt/format.h>
namespace DB
{
class WriteBuffer;
}
/// Displays the passed size in bytes as 123.45 GiB.
void formatReadableSizeWithBinarySuffix(double value, DB::WriteBuffer & out, int precision = 2);
std::string formatReadableSizeWithBinarySuffix(double value, int precision = 2);
/// Displays the passed size in bytes as 132.55 GB.
void formatReadableSizeWithDecimalSuffix(double value, DB::WriteBuffer & out, int precision = 2);
std::string formatReadableSizeWithDecimalSuffix(double value, int precision = 2);
/// Prints the number as 123.45 billion.
void formatReadableQuantity(double value, DB::WriteBuffer & out, int precision = 2);
std::string formatReadableQuantity(double value, int precision = 2);
/// Wrapper around value. If used with fmt library (e.g. for log messages),
/// value is automatically formatted as size with binary suffix.
struct ReadableSize
{
double value;
explicit ReadableSize(double value_) : value(value_) {}
};
/// See https://fmt.dev/latest/api.html#formatting-user-defined-types
template <>
struct fmt::formatter<ReadableSize>
{
constexpr static auto parse(format_parse_context & ctx)
{
const auto * it = ctx.begin();
const auto * end = ctx.end();
/// Only support {}.
if (it != end && *it != '}')
throw fmt::format_error("invalid format");
return it;
}
template <typename FormatContext>
auto format(const ReadableSize & size, FormatContext & ctx)
{
return fmt::format_to(ctx.out(), "{}", formatReadableSizeWithBinarySuffix(size.value));
}
};
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