"""

lsprofcalltree.py - lsprof output which is readable by kcachegrind

Authors:

    * David Allouche <david <at> allouche.net>

    * Jp Calderone & Itamar Shtull-Trauring

    * Johan Dahlin

This software may be used and distributed according to the terms

of the GNU General Public License, incorporated herein by reference.

"""

from __future__ import absolute_import, print_function

def label(code):

    if isinstance(code, str):

        return '~' + code    # built-in functions ('~' sorts at the end)

    else:

        return '%s %s:%d' % (code.co_name,

                             code.co_filename,

                             code.co_firstlineno)

class KCacheGrind(object):

    def __init__(self, profiler):

        self.data = profiler.getstats()

        self.out_file = None

    def output(self, out_file):

        self.out_file = out_file

        print('events: Ticks', file=out_file)

        self._print_summary()

        for entry in self.data:

            self._entry(entry)

    def _print_summary(self):

        max_cost = 0

        for entry in self.data:

            totaltime = int(entry.totaltime * 1000)

            max_cost = max(max_cost, totaltime)

        print('summary: %d' % max_cost, file=self.out_file)

    def _entry(self, entry):

        out_file = self.out_file

        code = entry.code

        if isinstance(code, str):

            print('fi=~', file=out_file)

        else:

            print('fi=%s' % code.co_filename, file=out_file)

        print('fn=%s' % label(code), file=out_file)

        inlinetime = int(entry.inlinetime * 1000)

        if isinstance(code, str):

            print('0 ', inlinetime, file=out_file)

        else:

            print('%d %d' % (code.co_firstlineno, inlinetime), file=out_file)

        # recursive calls are counted in entry.calls

        if entry.calls:

            calls = entry.calls

        else:

            calls = []

        if isinstance(code, str):

            lineno = 0

        else:

            lineno = code.co_firstlineno

        for subentry in calls:

            self._subentry(lineno, subentry)

        print(file=out_file)

    def _subentry(self, lineno, subentry):

        out_file = self.out_file

        code = subentry.code

        print('cfn=%s' % label(code), file=out_file)

        if isinstance(code, str):

            print('cfi=~', file=out_file)

            print('calls=%d 0' % subentry.callcount, file=out_file)

        else:

            print('cfi=%s' % code.co_filename, file=out_file)

            print('calls=%d %d' % (

                subentry.callcount, code.co_firstlineno), file=out_file)

        totaltime = int(subentry.totaltime * 1000)

        print('%d %d' % (lineno, totaltime), file=out_file)