### The `severity` module defines `severity_number` values
### and associated utility functions
###
###
### [OpenTelemetry Log Data Model - Trace Flags](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/logs/data-model.md#field-traceflags)
###
### [W3C Trace Context - Trace Flags](https://www.w3.org/TR/trace-context/#trace-flags)
###

use std::binary;

## The `from_int` function interprets a `trace_flags` integer value argument
## to see if it is `sampled-flag` ( decimal `128` ) is set. All other flags are
## currently unused and SHOULD be `0` ( unset ) in conforming `W3C Trace Context`
## and conformant `OpenTelemetry` implementations
##
fn from_int(trace_flags) with
  {
    # https://www.w3.org/TR/trace-context/#sampled-flag
    "sampled": " #{ (trace_flags & 128) > 0 }",
    "unused1": " #{ (trace_flags &  64) > 0 }",
    "unused2": " #{ (trace_flags &  32) > 0 }",
    "unused3": " #{ (trace_flags &  16) > 0 }",
    "unused4": " #{ (trace_flags &  8) > 0 }",
    "unused5": " #{ (trace_flags &  4) > 0 }",
    "unused6": " #{ (trace_flags &  2) > 0 }",
    "unused7": " #{ (trace_flags &  1) > 0 }",
  }
end;

## Checks if a `trace_flags` instance is correct and valid
fn is_valid(trace_flags) with
  trace_flags == 128 # All unused flags must be set to `0`
end;

## Returns the default configuration of traceflags
fn make_default() with
  0
end;