~linaro-toolchain-dev/cortex-strings/trunk

"""Shared routines for the plotters."""

import fileinput

import collections

Record = collections.namedtuple('Record', 'variant function bytes loops alignment elapsed rest')

def make_colours():

    return iter('m b g r c y k pink orange brown grey'.split())

def parse_value(v):

    """Turn text into a primitive"""

    try:

        if '.' in v:

            return float(v)

        else:

            return int(v)

    except ValueError:

        return v

def unique(records, name, prefer=''):

    """Return the unique values of a column in the records"""

    values = list(set(getattr(x, name) for x in records))

    if not values:

        return values

    elif type(values[0]) == str:

        return sorted(values, key=lambda x: '%-06d|%s' % (-prefer.find(x), x))

    else:

        return sorted(values)

def parse_row(line):

    return Record(*[parse_value(y) for y in line.split(':')])

def parse():

    """Parse a record file into named tuples, correcting for loop

    overhead along the way.

    """

    records = [parse_row(x) for x in fileinput.input()]

    # Pull out any bounce values

    costs = {}

    for record in [x for x in records if x.function=='bounce']:

        costs[(record.bytes, record.loops)] = record.elapsed

    # Fix up all of the records for cost

    out = []

    for record in records:

        if record.function == 'bounce':

            continue

        cost = costs.get((record.bytes, record.loops), None)

        if not cost:

            out.append(record)

        else:

            # Unfortunately you can't update a namedtuple...

            values = list(record)

            values[-2] -= cost

            out.append(Record(*values))

    return out