#!/usr/bin/env python

# Copyright (c) 2020 Project CHIP Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import optparse
import sys

TEMPLATE = '''/*
 *
 *    Copyright (c) 2020 Project CHIP Authors
 *    All rights reserved.
 *
 *    Licensed under the Apache License, Version 2.0 (the \"License\");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an \"AS IS\" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

/**
 *    \@file
 *      This file defines constants and macros for introspecting and
 *      manipulating CHIP versions.
 *
 *      !!! WARNING !!! WARNING !!! WARNING !!! WARNING !!!
 *
 *      DO NOT EDIT THIS FILE! This file is automatically-generated by
 *      the '${program}' script.
 *
 *      The constants and macros defined here may be used to, for ,
 *      example, conditionally-compile older, newer, or changed CHIP
 *      APIs based on the CHIP version. For example:
 *
 *          \@code
 *          #if CHIP_VERSION_CODE >= CHIP_VERSION_CODE_ENCODE(1, 5, 0)
 *              ...
 *          #else
 *              ...
 *          #endif
 *          \@endcode
 *
 */

#ifndef CHIP_VERSION_H_
#define CHIP_VERSION_H_

#define _CHIP_VERSION_CODE_MAJOR_WIDTH     8
#define _CHIP_VERSION_CODE_MINOR_WIDTH     8
#define _CHIP_VERSION_CODE_PATCH_WIDTH     8

#define _CHIP_VERSION_CODE_MAJOR_MASK     ((1 << _CHIP_VERSION_CODE_MAJOR_WIDTH)  - 1)
#define _CHIP_VERSION_CODE_MINOR_MASK     ((1 << _CHIP_VERSION_CODE_MINOR_WIDTH)  - 1)
#define _CHIP_VERSION_CODE_PATCH_MASK     ((1 << _CHIP_VERSION_CODE_PATCH_WIDTH)  - 1)

#define _CHIP_VERSION_CODE_MAJOR_SHIFT    24
#define _CHIP_VERSION_CODE_MINOR_SHIFT    16
#define _CHIP_VERSION_CODE_PATCH_SHIFT     8

/**
 *  \@def CHIP_VERSION_CODE_ENCODE(major, minor, patch)
 *
 *  \@brief
 *    Encode a CHIP version code from its constituent \@a major, \@a minor, and \@a patch
 *    components.
 *
 *    This macro may be used in conjunction with CHIP_VERSION_CODE to, for
 *    example, conditionally-compile older, newer, or changed CHIP APIs based
 *    on the CHIP version. For example:
 *
 *        \@code
 *        #if CHIP_VERSION_CODE >= CHIP_VERSION_CODE_ENCODE(1, 5, 0)
 *            ...
 *        #else
 *            ...
 *        #endif
 *        \@endcode
 *
 */
#define CHIP_VERSION_CODE_ENCODE(major, minor, patch)                                    \\
    ((((major)  & _CHIP_VERSION_CODE_MAJOR_MASK)  << _CHIP_VERSION_CODE_MAJOR_SHIFT)  | \\
     (((minor)  & _CHIP_VERSION_CODE_MINOR_MASK)  << _CHIP_VERSION_CODE_MINOR_SHIFT)  | \\
     (((patch)  & _CHIP_VERSION_CODE_PATCH_MASK)  << _CHIP_VERSION_CODE_PATCH_SHIFT))

/**
 *  \@def CHIP_VERSION_CODE_DECODE_MAJOR(code)
 *
 *  \@brief
 *    Decode a CHIP major version component from a CHIP version \@a code.
 *
 */
#define CHIP_VERSION_CODE_DECODE_MAJOR(code)  (((code) >> _CHIP_VERSION_CODE_MAJOR_SHIFT)  & _CHIP_VERSION_CODE_MAJOR_MASK)

/**
 *  \@def CHIP_VERSION_CODE_DECODE_MINOR(code)
 *
 *  \@brief
 *    Decode a CHIP minor version component from a CHIP version \@a code.
 *
 */
#define CHIP_VERSION_CODE_DECODE_MINOR(code)  (((code) >> _CHIP_VERSION_CODE_MINOR_SHIFT)  & _CHIP_VERSION_CODE_MINOR_MASK)

/**
 *  \@def CHIP_VERSION_CODE_DECODE_PATCH(code)
 *
 *  \@brief
 *    Decode a CHIP patch version component from a CHIP version \@a code.
 *
 */
#define CHIP_VERSION_CODE_DECODE_PATCH(code)  (((code) >> _CHIP_VERSION_CODE_PATCH_SHIFT)  & _CHIP_VERSION_CODE_PATCH_MASK)

/**
 *  \@def CHIP_VERSION_MAJOR
 *
 *  \@brief
 *    The CHIP version major component, as an unsigned integer.
 *
 */
#define CHIP_VERSION_MAJOR               %(chip_major)d

/**
 *  \@def CHIP_VERSION_MINOR
 *
 *  \@brief
 *    The CHIP version minor component, as an unsigned integer.
 *
 */
#define CHIP_VERSION_MINOR               %(chip_minor)d

/**
 *  \@def CHIP_VERSION_PATCH
 *
 *  \@brief
 *    The CHIP version patch component, as an unsigned integer.
 *
 */
#define CHIP_VERSION_PATCH               %(chip_patch)d

/**
 *  \@def CHIP_VERSION_EXTRA
 *
 *  \@brief
 *    The CHIP version extra component, as a quoted C string.
 *
 */
#define CHIP_VERSION_EXTRA               \"%(chip_extra)s\"

/**
 *  \@def CHIP_VERSION_STRING
 *
 *  \@brief
 *    The CHIP version, as a quoted C string.
 *
 */
#define CHIP_VERSION_STRING              \"%(chip_version)s\"

/**
 *  \@def CHIP_VERSION_CODE
 *
 *  \@brief
 *    The CHIP version, including the major, minor, and patch components,
 *    encoded as an unsigned integer.
 *
 *    This macro may be used in conjunction with CHIP_VERSION_CODE_ENCODE
 *    to, for example, conditionally-compile older, newer, or changed CHIP
 *    APIs based on the CHIP version. For example:
 *
 *        \@code
 *        #if CHIP_VERSION_CODE >= CHIP_VERSION_CODE_ENCODE(1, 5, 0)
 *            ...
 *        #else
 *            ...
 *        #endif
 *        \@endcode
 *
 */
#define CHIP_VERSION_CODE                CHIP_VERSION_CODE_ENCODE( \\
          CHIP_VERSION_MAJOR,                                      \\
          CHIP_VERSION_MINOR,                                      \\
          CHIP_VERSION_PATCH                                       \\
        )

#endif /* CHIP_VERSION_H_ */
'''


def main(argv):
    parser = optparse.OptionParser()

    parser.add_option('--output_file')
    parser.add_option('--chip_major', type=int, default=0)
    parser.add_option('--chip_minor', type=int, default=0)
    parser.add_option('--chip_patch', type=int, default=0)
    parser.add_option('--chip_extra', type=str, default='')

    options, _ = parser.parse_args(argv)

    template_args = {
        'chip_major': options.chip_major,
        'chip_minor': options.chip_minor,
        'chip_patch': options.chip_patch,
        'chip_extra': options.chip_extra,
    }

    template_args['chip_version'] = '%d.%d.%d%s' % (
        options.chip_major, options.chip_minor, options.chip_patch, options.chip_extra)

    with open(options.output_file, 'w') as chip_version_file:
        chip_version_file.write(TEMPLATE % template_args)

    return 0


if __name__ == '__main__':
    sys.exit(main(sys.argv[1:]))