# compare_baselines.py takes two lists of baselines produced by find_public_apis.pl

# and compares them for added, removed and moved headers as well as api class change

#

# outputs report as csv

#

# usage: python compare_baselines.py <baseline1> <baseline2>

import sys

# parse a baseline file produced by find_public_apis.pl into a map

def parse_baseline(filename):

	file = open(filename)

	count = 0

	db = {}

	for line in file:

		if count > 0:

			tokens = line.split()

			pathname = tokens[0].strip().lower() # watch out for lowecasing here!

			apiclass = tokens[1].strip()

			apiclassreason = tokens[2].strip()

			dbentry = {'pathname': pathname, 'class': apiclass, 'reason': apiclassreason, 'duplicate':''}

			filename = strip_path(pathname)

			if db.has_key(filename):

				db[filename]['duplicate'] = pathname

#				print >> sys.stderr, 'duplicate filename at paths %s and %s' % (pathname, db[filename]['pathname'])

			else:

				db[filename] = dbentry

		count = count + 1	

	return db

# strip pathnames from filenames

def strip_path(pathname):

	while pathname.find('/') != -1:

		x=pathname.find('/')

		pathname = pathname[x+1:]

	return pathname.lower()

def compare_dbs(db1, db2):

	print 'apiname,status,classchange,class1,class2,pathname1,pathname2,duplicate1,duplicate2'

	for key in db1.keys():

		db1entry = db1[key]

		status = 'ok'

		if db2.has_key(key):

			db2entry = db2[key]

			# filename exists, does path match?

			if db1entry['pathname'] != db2entry['pathname']:

				status = 'moved'

			# does class match?

			if db1entry['class'] != db2entry['class']:

				classchange = 'yes'

			else:

				classchange = 'no'

			print '%s,%s,%s,%s,%s,%s,%s,%s,%s' % (key, status, classchange,db1entry['class'],db2entry['class'],db1entry['pathname'], db2entry['pathname'],db1entry['duplicate'],db2entry['duplicate'])

		else:

			status = 'removed'

			print '%s,%s,%s,%s,%s,%s,%s,%s,%s' % (key, status, 'no',db1entry['class'],'',db1entry['pathname'], '',db1entry['duplicate'],'')

	for key in db2.keys():

		if not db1.has_key(key):

			db2entry = db2[key]

			status = 'added'

			print '%s,%s,%s,%s,%s,%s,%s,%s,%s' % (key, status, 'no','',db2entry['class'],'',db2entry['pathname'], '',db2entry['duplicate'])

			# handle duplicates

# read the list of published filenames

bl1name = sys.argv[1]

bl2name = sys.argv[2]

db1 = parse_baseline(bl1name)

db2 = parse_baseline(bl2name)

compare_dbs(db1, db2)