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#!/usr/bin/python2
# Copyright 2016 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import binascii
import sys
if len(sys.argv) < 2:
sys.exit("Usage: %s icu_data_file [output_assembly_file]" % sys.argv[0])
input_file = sys.argv[1]
n = input_file.find(".dat")
if n == -1:
sys.exit("%s is not an ICU .dat file." % input_file)
if len(sys.argv) < 3:
output_file = input_file[0:n] + "_dat.S"
else:
output_file = sys.argv[2]
if input_file.find("l.dat") == -1:
if input_file.find("b.dat") == -1:
sys.exit("%s has no endianness marker." % input_file)
else:
step = 1
else:
step = -1
input_data = open(input_file, 'rb').read()
n = input_data.find("icudt")
if n == -1:
sys.exit("Cannot find a version number in %s." % input_file)
version_number = input_data[n + 5:n + 7]
output = open(output_file, 'w')
output.write(".globl icudt" + version_number + "_dat\n"
"\t.section .note.GNU-stack,\"\",%progbits\n"
"\t.section .rodata\n"
"\t.balign 16\n"
"#ifdef U_HIDE_DATA_SYMBOL\n"
"\t.hidden icudt" + version_number + "_dat\n"
"#endif\n"
"\t.type icudt" + version_number + "_dat,%object\n"
"icudt" + version_number + "_dat:\n")
split = [binascii.hexlify(input_data[i:i + 4][::step]).upper().lstrip('0')
for i in range(0, len(input_data), 4)]
for i in range(len(split)):
if (len(split[i]) == 0):
value = '0'
elif (len(split[i]) == 1):
if not any((c in '123456789') for c in split[i]):
value = '0x0' + split[i]
else:
value = split[i]
elif (len(split[i]) % 2 == 1):
value = '0x0' + split[i]
else:
value = '0x' + split[i]
if (i % 32 == 0):
output.write("\n.long ")
else:
output.write(",")
output.write(value)
output.write("\n")
output.close()
print "Generated " + output_file