mirror of
https://github.com/aantron/better-enums.git
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112 lines
4.0 KiB
Python
Executable File
112 lines
4.0 KiB
Python
Executable File
#! /usr/bin/env python
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# This file is part of Better Enums, released under the BSD 2-clause license.
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# See LICENSE for details, or visit http://github.com/aantron/better-enums.
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import os
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import sys
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class MultiLine(object):
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def __init__(self, stream, indent = 4, columns = 80, initial_column = 0):
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self._columns_left = columns - initial_column
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self._indent = indent
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self._columns = columns
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self._stream = stream
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def write(self, token, last = False):
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break_line = False
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if last:
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if len(token) > self._columns_left:
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break_line = True
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else:
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if len(token) > self._columns_left - 1:
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break_line = True
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if break_line:
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print >> self._stream, ' ' * (self._columns_left - 1) + '\\'
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self._stream.write(' ' * self._indent)
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self._columns_left = self._columns - self._indent
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token = token.lstrip()
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self._stream.write(token)
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self._columns_left -= len(token)
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def generate(stream, filename, count, script):
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print >> stream, '/// @file ' + filename
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print >> stream, '/// @brief Preprocessor higher-order map macro.'
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print >> stream, '///'
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print >> stream, '/// This file was automatically generated by ' + script
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print >> stream, ''
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print >> stream, '#pragma once'
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print >> stream, ''
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print >> stream, '#ifndef _BETTER_ENUM_ENUM_PREPROCESSOR_MAP_H_'
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print >> stream, '#define _BETTER_ENUM_ENUM_PREPROCESSOR_MAP_H_'
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print >> stream, ''
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print >> stream, '#define _ENUM_PP_MAP(macro, data, ...) \\'
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print >> stream, ' _ENUM_PP_APPLY(_ENUM_PP_MAP_VAR_COUNT, ' + \
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'_ENUM_PP_COUNT(__VA_ARGS__)) \\'
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print >> stream, ' (macro, data, __VA_ARGS__)'
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print >> stream, ''
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print >> stream, '#define _ENUM_PP_MAP_VAR_COUNT(count) ' + \
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'_ENUM_PP_MAP_ ## count'
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print >> stream, ''
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print >> stream, '#define _ENUM_PP_APPLY(macro, ...) macro(__VA_ARGS__)'
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print >> stream, ''
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print >> stream, '#define _ENUM_PP_MAP_1(macro, data, x) ' + \
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'_ENUM_PP_APPLY(macro, data, x)'
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for index in range(2, count + 1):
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print >> stream, '#define _ENUM_PP_MAP_' + str(index) + \
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'(macro, data, x, ...) ' + \
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'_ENUM_PP_APPLY(macro, data, x), \\'
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print >> stream, ' ' + \
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'_ENUM_PP_MAP_' + str(index - 1) + \
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'(macro, data, __VA_ARGS__)'
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print >> stream, ''
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pp_count_impl_prefix = '#define _ENUM_PP_COUNT_IMPL(_1,'
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stream.write(pp_count_impl_prefix)
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pp_count_impl = MultiLine(stream = stream, indent = 4,
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initial_column = len(pp_count_impl_prefix))
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for index in range(2, count + 1):
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pp_count_impl.write(' _' + str(index) + ',')
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pp_count_impl.write(' count,')
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pp_count_impl.write(' ...)')
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pp_count_impl.write(' count', last = True)
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print >> stream, ''
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print >> stream, ''
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pp_count_prefix = \
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'#define _ENUM_PP_COUNT(...) _ENUM_PP_COUNT_IMPL(__VA_ARGS__,'
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stream.write(pp_count_prefix)
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pp_count = MultiLine(stream = stream, indent = 4,
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initial_column = len(pp_count_prefix))
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for index in range(0, count - 1):
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pp_count.write(' ' + str(count - index) + ',')
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pp_count.write(' 1)', last = True)
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print >> stream, ''
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print >> stream, ''
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print >> stream, '#endif // #ifndef _BETTER_ENUM_ENUM_PREPROCESSOR_MAP_H_'
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if __name__ == '__main__':
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if len(sys.argv) != 3:
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print >> sys.stderr, 'Usage: ' + sys.argv[0] + ' FILE COUNT'
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print >> sys.stderr, ''
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print >> sys.stderr, 'Prints map macro definition to FILE.'
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sys.exit(1)
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output_file = open(sys.argv[1], "w")
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try:
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generate(output_file, sys.argv[1], int(sys.argv[2]),
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os.path.basename(sys.argv[0]))
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finally:
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output_file.close()
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sys.exit(0)
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