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#!/usr/bin/env python
# Copyright 2016 MongoDB Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3,
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# As a special exception, the copyright holders give permission to link the
# code of portions of this program with the OpenSSL library under certain
# conditions as described in each individual source file and distribute
# linked combinations including the program with the OpenSSL library. You
# must comply with the GNU Affero General Public License in all respects
# for all of the code used other than as permitted herein. If you modify
# file(s) with this exception, you may extend this exception to your
# version of the file(s), but you are not obligated to do so. If you do not
# wish to do so, delete this exception statement from your version. If you
# delete this exception statement from all source files in the program,
# then also delete it in the license file.
import optparse
import os
import sys
def main(argv):
parser = optparse.OptionParser()
parser.add_option('-o', '--output', action='store', dest='output_cpp_file',
help='path to output cpp file')
parser.add_option('-i', '--input', action='store', dest='input_data_file',
help='input ICU data file, in common format (.dat)')
(options, args) = parser.parse_args(argv)
if len(args) > 1:
parser.error("too many arguments")
if options.output_cpp_file is None:
parser.error("output file unspecified")
if options.input_data_file is None:
parser.error("input ICU data file unspecified")
generate_cpp_file(options.input_data_file, options.output_cpp_file)
def generate_cpp_file(data_file_path, cpp_file_path):
source_template = '''// AUTO-GENERATED FILE DO NOT EDIT
// See generate_icu_init_cpp.py.
/**
* Copyright 2016 MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/platform/basic.h"
#include <unicode/udata.h>
#include "mongo/base/init.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace {
// alignas() is used here to ensure 16-alignment of ICU data. See the following excerpt from the
// ICU user guide (<http://userguide.icu-project.org/icudata#TOC-Alignment>):
//
// "ICU data is designed to be 16-aligned, with natural alignment of values inside the data
// structure, so that the data is usable as is when memory-mapped. Memory-mapping (as well as
// memory allocation) provides at least 16-alignment on modern platforms. Some CPUs require
// n-alignment of types of size n bytes (and crash on unaligned reads), other CPUs usually operate
// faster on data that is aligned properly. Some of the ICU code explicitly checks for proper
// alignment."
alignas(16) const uint8_t kRawData[] = {%(decimal_encoded_data)s};
} // namespace
MONGO_INITIALIZER(LoadICUData)(InitializerContext* context) {
UErrorCode status = U_ZERO_ERROR;
udata_setCommonData(kRawData, &status);
fassert(40088, U_SUCCESS(status));
return Status::OK();
}
} // namespace mongo
'''
decimal_encoded_data = ''
with open(data_file_path, 'rb') as data_file:
decimal_encoded_data = ','.join([str(ord(byte)) for byte in data_file.read()])
with open(cpp_file_path, 'wb') as cpp_file:
cpp_file.write(source_template % dict(decimal_encoded_data=decimal_encoded_data))
if __name__ == '__main__':
main(sys.argv)
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