#-------------------------------------------------------------------------------
# map_diff
# 22/03/2022
# tool script used to easily compare diffs of (IAR) .map files
#
# usage ex: diff -hu file1.map file2.map | python map_diff.py
#-------------------------------------------------------------------------------

import fileinput
import re

old_size = 0x0
new_size = 0x0
prev_line = ""
total_diff = 0

p = re.compile('0x\w+ ')
for line in fileinput.input():
    val = re.search(p, line)
    if val:
        if line[0] == '-':
            old_size = int(val.group(0), base=16)
            prev_line = line
        else:
            new_size = int(val.group(0), base=16)
            if new_size != old_size:
                diff = new_size-old_size
                total_diff += diff
                print(prev_line + line + "diff: " + str(diff))

print("total diff: " + str(total_diff))