Pretty printer for numbers with units.
Synopsis
Declared in <folly/String.h>
std::string
prettyPrint(
double val,
PrettyType type,
bool addSpace = true);Description
A pretty‐printer for numbers that appends suffixes of units of the given type. It prints 4 sig‐figs of value with the most appropriate unit.
If `addSpace' is true, we put a space between the units suffix and the value.
Current types are: PRETTY_TIME ‐ s, ms, us, ns, etc. PRETTY_TIME_HMS ‐ h, m, s, ms, us, ns, etc. PRETTY_BYTES_METRIC ‐ kB, MB, GB, etc (goes up by 10ˆ3 = 1000 each time) PRETTY_BYTES ‐ kB, MB, GB, etc (goes up by 2ˆ10 = 1024 each time) PRETTY_BYTES_IEC ‐ KiB, MiB, GiB, etc PRETTY_UNITS_METRIC ‐ k, M, G, etc (goes up by 10ˆ3 = 1000 each time) PRETTY_UNITS_BINARY ‐ k, M, G, etc (goes up by 2ˆ10 = 1024 each time) PRETTY_UNITS_BINARY_IEC ‐ Ki, Mi, Gi, etc PRETTY_SI ‐ full SI metric prefixes from yocto to Yotta http://en.wikipedia.org/wiki/Metric_prefix PRETTY_BITS_METRIC ‐ kb, Mb, Gb, etc (goes up by 10ˆ3 = 1000 each time) Useful for network bandwidth (e.g., 1 Gbps) PRETTY_BITS ‐ alias for PRETTY_BITS_METRIC
Return Value
The pretty‐printed value.
Parameters
Name |
Description |
val |
The value to format. |
type |
The unit family to use. |
addSpace |
Whether to insert a space between the value and its unit. |
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