cs-units 20190220

unit suffixes for nonnegative integers; parsing and transcription

Functions for decomposing nonnegative integers according to various unit scales.

Presupplied scales:

• BINARY_BYTES_SCALE: Binary units of (B)ytes, KiB, MiB, GiB etc.
• DECIMAL_BYTES_SCALE: Decimal units of (B)ytes, KB, MB, GB etc.
• DECIMAL_SCALE: Unit suffixes K, M, G etc.
• TIME_SCALE: Units of (s)econds, (m)inutes, (h)ours, (d)ays and (w)eeks.

Function combine(components, scale)

Combine a sequence of value components as from human() into an integer.

Function geek_bytes(n)

Decompose a nonnegative integer n into counts by unit from BINARY_BYTES_SCALE.

Function human(n, scale)

Decompose a nonnegative integer n into counts by unit from scale.

Parameters:

• n: a nonnegative integer.
• scale: a sequence of (factor,unit) where factor is the size factor to the follow scale and unit is the designator of the unit.

Function human_bytes(n)

Decompose a nonnegative integer n into counts by unit from DECIMAL_BYTES_SCALE.

Function human_time(n, scale=None)

Decompose a nonnegative integer n into counts by unit from TIME_SCALE.

Function multiparse(s, scales, offset=0)

Parse an integer followed by an optional scale and return computed value. Returns the parsed value and the new offset.

Parameters:

• s: the string to parse.
• scales: an iterable of scale arrays of (factor, unit_name).
• offset: starting position for parse.

Function parse(s, scale, offset=0)

Parse an integer followed by an optional scale and return computed value. Returns the parsed value and the new offset.

Parameters:

• s: the string to parse.
• scale: a scale array of (factor, unit_name).
• offset: starting position for parse.

Function transcribe(n, scale, max_parts=None, skip_zero=False, sep='')

Transcribe a nonnegative integer n against scale.

Parameters:

• n: a nonnegative integer.
• scale: a sequence of (factor, unit) where factor is the size factor to the follow scale and unit is the designator of the unit.
• max_parts: the maximum number of components to transcribe.
• skip_zero: omit components of value 0.
• sep: separator between words, default: ''.

Function transcribe_bytes_geek(n, max_parts=1, **kw)

Transcribe a nonnegative integer n against BINARY_BYTES_SCALE.

Function transcribe_bytes_human(n, max_parts=1, **kw)

Transcribe a nonnegative integer n against DECIMAL_BYTES_SCALE.

Function transcribe_time(n, max_parts=3, **kw)

Transcribe a nonnegative integer n against TIME_SCALE.