"""
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.
"""

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 >> out_file, 'events: Ticks'
       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 >> self.out_file, 'summary: %d' % (max_cost,)

   def _entry(self, entry):
       out_file = self.out_file

       code = entry.code
       #print >> out_file, 'ob=%s' % (code.co_filename,)
       if isinstance(code, str):
           print >> out_file, 'fi=~'
       else:
           print >> out_file, 'fi=%s' % (code.co_filename,)
       print >> out_file, 'fn=%s' % (label(code),)

       inlinetime = int(entry.inlinetime * 1000)
       if isinstance(code, str):
           print >> out_file, '0 ', inlinetime
       else:
           print >> out_file, '%d %d' % (code.co_firstlineno, inlinetime)

       # 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 >> out_file

   def _subentry(self, lineno, subentry):
       out_file = self.out_file
       code = subentry.code
       #print >> out_file, 'cob=%s' % (code.co_filename,)
       print >> out_file, 'cfn=%s' % (label(code),)
       if isinstance(code, str):
           print >> out_file, 'cfi=~'
           print >> out_file, 'calls=%d 0' % (subentry.callcount,)
       else:
           print >> out_file, 'cfi=%s' % (code.co_filename,)
           print >> out_file, 'calls=%d %d' % (
               subentry.callcount, code.co_firstlineno)

       totaltime = int(subentry.totaltime * 1000)
       print >> out_file, '%d %d' % (lineno, totaltime)

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