1 | # SPDX-License-Identifier: BSD-2-Clause |
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2 | """ This module provides classes for content generation. """ |
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3 | |
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4 | # Copyright (C) 2019, 2020 embedded brains GmbH (http://www.embedded-brains.de) |
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5 | # |
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6 | # Redistribution and use in source and binary forms, with or without |
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7 | # modification, are permitted provided that the following conditions |
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8 | # are met: |
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9 | # 1. Redistributions of source code must retain the above copyright |
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10 | # notice, this list of conditions and the following disclaimer. |
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11 | # 2. Redistributions in binary form must reproduce the above copyright |
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12 | # notice, this list of conditions and the following disclaimer in the |
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13 | # documentation and/or other materials provided with the distribution. |
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14 | # |
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15 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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16 | # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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17 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 | # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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19 | # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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20 | # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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21 | # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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22 | # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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23 | # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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24 | # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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25 | # POSSIBILITY OF SUCH DAMAGE. |
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26 | |
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27 | from contextlib import contextmanager |
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28 | import itertools |
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29 | import os |
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30 | import re |
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31 | import textwrap |
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32 | from typing import Callable, ContextManager, Iterator, List, Optional, Union |
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33 | |
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34 | from rtemsqual.items import Item |
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35 | |
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36 | AddContext = Callable[["Content"], ContextManager[None]] |
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37 | GenericContent = Union[str, List[str], "Content"] |
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38 | |
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39 | |
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40 | class Copyright: |
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41 | """ |
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42 | This class represents a copyright holder with its years of substantial |
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43 | contributions. |
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44 | """ |
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45 | def __init__(self, holder): |
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46 | self._holder = holder |
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47 | self._years = set() |
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48 | |
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49 | def add_year(self, year: str): |
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50 | """ |
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51 | Adds a year to the set of substantial contributions of this copyright |
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52 | holder. |
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53 | """ |
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54 | self._years.add(year) |
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55 | |
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56 | def get_statement(self) -> str: |
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57 | """ Returns a copyright statement. """ |
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58 | line = "Copyright (C)" |
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59 | years = sorted(self._years) |
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60 | year_count = len(years) |
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61 | if year_count == 1: |
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62 | line += " " + years[0] |
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63 | elif year_count > 1: |
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64 | line += " " + years[0] + ", " + years[-1] |
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65 | line += " " + self._holder |
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66 | return line |
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67 | |
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68 | def __lt__(self, other: "Copyright") -> bool: |
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69 | # pylint: disable=protected-access |
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70 | if self._years and other._years: |
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71 | self_first_year = sorted(self._years)[0] |
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72 | other_first_year = sorted(other._years)[0] |
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73 | if self_first_year == other_first_year: |
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74 | return self._holder > other._holder |
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75 | return self_first_year > other_first_year |
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76 | if self._years or other._years: |
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77 | return True |
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78 | return self._holder > other._holder |
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79 | |
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80 | |
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81 | class Copyrights: |
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82 | """ This class represents a set of copyright holders. """ |
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83 | def __init__(self): |
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84 | self.copyrights = {} |
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85 | |
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86 | def register(self, statement): |
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87 | """ Registers a copyright statement. """ |
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88 | match = re.search( |
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89 | r"^\s*Copyright\s+\(C\)\s+([0-9]+),\s*([0-9]+)\s+(.+)\s*$", |
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90 | statement, |
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91 | flags=re.I, |
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92 | ) |
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93 | if match: |
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94 | holder = match.group(3) |
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95 | the_copyright = self.copyrights.setdefault(holder, |
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96 | Copyright(holder)) |
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97 | the_copyright.add_year(match.group(1)) |
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98 | the_copyright.add_year(match.group(2)) |
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99 | return |
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100 | match = re.search( |
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101 | r"^\s*Copyright\s+\(C\)\s+([0-9]+)\s+(.+)\s*$", |
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102 | statement, |
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103 | flags=re.I, |
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104 | ) |
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105 | if match: |
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106 | holder = match.group(2) |
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107 | the_copyright = self.copyrights.setdefault(holder, |
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108 | Copyright(holder)) |
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109 | the_copyright.add_year(match.group(1)) |
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110 | return |
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111 | match = re.search(r"^\s*Copyright\s+\(C\)\s+(.+)\s*$", |
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112 | statement, |
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113 | flags=re.I) |
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114 | if match: |
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115 | holder = match.group(1) |
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116 | self.copyrights.setdefault(holder, Copyright(holder)) |
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117 | return |
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118 | raise ValueError(statement) |
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119 | |
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120 | def get_statements(self): |
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121 | """ Returns all registered copyright statements as a sorted list. """ |
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122 | statements = [] |
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123 | for the_copyright in sorted(self.copyrights.values()): |
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124 | statements.append(the_copyright.get_statement()) |
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125 | return statements |
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126 | |
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127 | |
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128 | def _make_lines(content: GenericContent) -> List[str]: |
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129 | if isinstance(content, str): |
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130 | return content.strip("\n").split("\n") |
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131 | if isinstance(content, list): |
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132 | return content |
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133 | return content.lines |
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134 | |
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135 | |
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136 | def _indent(lines: List[str], indent: str, |
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137 | empty_line_indent: str) -> List[str]: |
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138 | if indent: |
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139 | return [ |
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140 | indent + line if line else empty_line_indent + line |
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141 | for line in lines |
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142 | ] |
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143 | return lines |
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144 | |
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145 | |
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146 | @contextmanager |
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147 | def _add_context(_content: "Content") -> Iterator[None]: |
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148 | yield |
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149 | |
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150 | |
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151 | class Content: |
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152 | """ This class builds content. """ |
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153 | |
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154 | # pylint: disable=too-many-instance-attributes |
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155 | def __init__(self, the_license): |
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156 | self._lines = [] # type: List[str] |
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157 | self._license = the_license |
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158 | self._copyrights = Copyrights() |
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159 | self._gap = False |
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160 | self._tab = " " |
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161 | self._indents = [""] |
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162 | self._indent = "" |
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163 | self._empty_line_indents = [""] |
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164 | self._empty_line_indent = "" |
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165 | |
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166 | def __str__(self): |
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167 | return "\n".join(itertools.chain(self._lines, [""])) |
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168 | |
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169 | @property |
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170 | def lines(self) -> List[str]: |
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171 | """ The lines. """ |
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172 | return self._lines |
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173 | |
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174 | def append(self, content: GenericContent) -> None: |
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175 | """ Appends the content. """ |
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176 | self._lines.extend( |
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177 | _indent(_make_lines(content), self._indent, |
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178 | self._empty_line_indent)) |
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179 | |
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180 | def prepend(self, content: GenericContent) -> None: |
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181 | """ Prepends the content. """ |
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182 | self._lines[0:0] = _indent(_make_lines(content), self._indent, |
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183 | self._empty_line_indent) |
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184 | |
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185 | def add(self, |
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186 | content: Optional[GenericContent], |
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187 | context: AddContext = _add_context) -> None: |
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188 | """ |
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189 | Skips leading empty lines, adds a gap if needed, then adds the content. |
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190 | """ |
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191 | if not content: |
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192 | return |
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193 | lines = _make_lines(content) |
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194 | index = 0 |
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195 | for line in lines: |
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196 | if line: |
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197 | if self._gap: |
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198 | self._lines.extend( |
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199 | _indent([""], self._indent, self._empty_line_indent)) |
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200 | self._gap = True |
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201 | with context(self): |
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202 | self._lines.extend( |
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203 | _indent(lines[index:], self._indent, |
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204 | self._empty_line_indent)) |
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205 | break |
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206 | index += 1 |
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207 | |
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208 | @property |
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209 | def gap(self) -> bool: |
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210 | """ |
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211 | True if the next Content.add() adds a gap before the new content, |
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212 | otherwise False. |
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213 | """ |
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214 | return self._gap |
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215 | |
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216 | @gap.setter |
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217 | def gap(self, value: bool) -> None: |
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218 | """ Sets the gap indicator for Content.add(). """ |
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219 | self._gap = value |
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220 | |
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221 | def _update_indent(self) -> None: |
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222 | self._indent = "".join(self._indents) |
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223 | empty_line_indent = "".join(self._empty_line_indents) |
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224 | if empty_line_indent.isspace(): |
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225 | self._empty_line_indent = "" |
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226 | else: |
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227 | self._empty_line_indent = empty_line_indent |
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228 | |
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229 | def push_indent(self, |
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230 | indent: Optional[str] = None, |
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231 | empty_line_indent: Optional[str] = None) -> None: |
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232 | """ Pushes an indent level. """ |
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233 | self._indents.append(indent if indent else self._tab) |
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234 | self._empty_line_indents.append( |
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235 | empty_line_indent if empty_line_indent else self._tab) |
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236 | self._update_indent() |
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237 | |
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238 | def pop_indent(self) -> None: |
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239 | """ Pops an indent level. """ |
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240 | self._indents.pop() |
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241 | self._empty_line_indents.pop() |
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242 | self._update_indent() |
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243 | |
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244 | @contextmanager |
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245 | def indent(self, |
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246 | indent: Optional[str] = None, |
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247 | empty_line_indent: Optional[str] = None) -> Iterator[None]: |
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248 | """ Opens an indent context. """ |
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249 | self.push_indent(indent, empty_line_indent) |
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250 | yield |
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251 | self.pop_indent() |
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252 | |
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253 | def indent_lines(self, level: int) -> None: |
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254 | """ Indents all lines by the specified indent level. """ |
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255 | prefix = level * self._tab |
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256 | self._lines = [prefix + line if line else line for line in self._lines] |
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257 | |
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258 | def add_blank_line(self): |
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259 | """ Adds a blank line. """ |
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260 | self._lines.append("") |
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261 | |
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262 | def register_license(self, the_license: str) -> None: |
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263 | """ Registers a licence for the content. """ |
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264 | licenses = re.split(r"\s+OR\s+", the_license) |
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265 | if self._license not in licenses: |
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266 | raise ValueError(the_license) |
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267 | |
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268 | def register_copyright(self, statement: str) -> None: |
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269 | """ Registers a copyright statement for the content. """ |
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270 | self._copyrights.register(statement) |
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271 | |
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272 | def register_license_and_copyrights_of_item(self, item: Item) -> None: |
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273 | """ Registers the license and copyrights of the item. """ |
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274 | self.register_license(item["SPDX-License-Identifier"]) |
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275 | for statement in item["copyrights"]: |
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276 | self.register_copyright(statement) |
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277 | |
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278 | def write(self, path: str) -> None: |
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279 | """ Writes the content to the file specified by the path. """ |
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280 | directory = os.path.dirname(path) |
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281 | if directory: |
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282 | os.makedirs(directory, exist_ok=True) |
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283 | with open(path, "w+") as out: |
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284 | out.write(str(self)) |
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285 | |
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286 | |
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287 | class SphinxContent(Content): |
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288 | """ This class builds Sphinx content. """ |
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289 | def __init__(self): |
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290 | super().__init__("CC-BY-SA-4.0") |
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291 | self._tab = " " |
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292 | |
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293 | def add_label(self, label: str) -> None: |
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294 | """ Adds a label. """ |
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295 | self.add(".. _" + label.strip() + ":") |
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296 | |
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297 | def add_header(self, name, level="=") -> None: |
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298 | """ Adds a header. """ |
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299 | name = name.strip() |
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300 | self.add([name, level * len(name)]) |
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301 | |
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302 | def add_index_entries(self, entries) -> None: |
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303 | """ Adds a list of index entries the content. """ |
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304 | self.add([".. index:: " + entry for entry in _make_lines(entries)]) |
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305 | |
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306 | def add_definition_item(self, name, lines) -> None: |
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307 | """ Adds a definition item the content. """ |
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308 | @contextmanager |
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309 | def _definition_item_context(content: Content) -> Iterator[None]: |
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310 | content.append(name) |
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311 | content.push_indent() |
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312 | yield |
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313 | content.pop_indent() |
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314 | |
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315 | self.add(lines, _definition_item_context) |
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316 | |
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317 | def add_licence_and_copyrights(self) -> None: |
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318 | """ |
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319 | Adds a licence and copyright block according to the registered licenses |
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320 | and copyrights. |
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321 | """ |
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322 | statements = self._copyrights.get_statements() |
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323 | if statements: |
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324 | self.prepend("") |
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325 | self.prepend([f".. {stm}" for stm in statements]) |
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326 | self.prepend([f".. SPDX-License-Identifier: {self._license}", ""]) |
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327 | |
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328 | |
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329 | class MacroToSphinx: |
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330 | """ This class expands specification item macros to Sphinx markup. """ |
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331 | def __init__(self): |
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332 | self._terms = {} |
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333 | |
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334 | def set_terms(self, terms): |
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335 | """ Sets the glossary of terms used for macro expansion. """ |
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336 | self._terms = terms |
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337 | |
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338 | def substitute(self, text): |
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339 | """ |
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340 | Substitutes all specification item macros contained in the text. |
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341 | """ |
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342 | return re.sub(r"@@|@([a-z]+){([^}]+)}", self, text) |
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343 | |
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344 | def __call__(self, match): |
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345 | name = match.group(1) |
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346 | if name: |
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347 | roles = { |
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348 | "term": |
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349 | lambda x: ":term:`" + self._terms[x]["glossary-term"] + "`" |
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350 | } |
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351 | return roles[name](match.group(2)) |
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352 | assert match.group(0) == "@@" |
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353 | return "@" |
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354 | |
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355 | |
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356 | _BSD_2_CLAUSE_LICENSE = """Redistribution and use in source and binary \ |
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357 | forms, with or without |
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358 | modification, are permitted provided that the following conditions |
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359 | are met: |
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360 | 1. Redistributions of source code must retain the above copyright |
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361 | notice, this list of conditions and the following disclaimer. |
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362 | 2. Redistributions in binary form must reproduce the above copyright |
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363 | notice, this list of conditions and the following disclaimer in the |
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364 | documentation and/or other materials provided with the distribution. |
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365 | |
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366 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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367 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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368 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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369 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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370 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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371 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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372 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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373 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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374 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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375 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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376 | POSSIBILITY OF SUCH DAMAGE.""" |
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377 | |
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378 | |
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379 | class CContent(Content): |
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380 | """ This class builds C content. """ |
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381 | |
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382 | # pylint: disable=too-many-public-methods |
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383 | def __init__(self): |
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384 | super().__init__("BSD-2-Clause") |
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385 | |
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386 | def add_spdx_license_identifier(self): |
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387 | """ |
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388 | Adds an SPDX License Identifier according to the registered licenses. |
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389 | """ |
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390 | self.prepend([f"/* SPDX-License-Identifier: {self._license} */", ""]) |
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391 | |
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392 | def add_copyrights_and_licenses(self): |
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393 | """ |
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394 | Adds the copyrights and licenses according to the registered copyrights |
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395 | and licenses. |
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396 | """ |
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397 | with self.comment_block(): |
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398 | self.add(self._copyrights.get_statements()) |
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399 | self.add(_BSD_2_CLAUSE_LICENSE) |
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400 | |
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401 | def add_have_config(self): |
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402 | """ Adds a guarded config.h include. """ |
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403 | self.add(["#ifdef HAVE_CONFIG_H", "#include \"config.h\"", "#endif"]) |
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404 | |
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405 | def add_includes(self, includes: List[str], local: bool = False) -> None: |
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406 | """ Adds a block of includes. """ |
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407 | class IncludeKey: # pylint: disable=too-few-public-methods |
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408 | """ Provides a key to sort includes. """ |
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409 | def __init__(self, inc: str): |
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410 | self._inc = inc |
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411 | |
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412 | def __lt__(self, other: "IncludeKey") -> bool: |
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413 | left = self._inc.split("/") |
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414 | right = other._inc.split("/") |
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415 | left_len = len(left) |
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416 | right_len = len(right) |
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417 | if left_len == right_len: |
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418 | for left_part, right_part in zip(left[:-1], right[:-1]): |
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419 | if left_part != right_part: |
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420 | return left_part < right_part |
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421 | return left[-1] < right[-1] |
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422 | return left_len < right_len |
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423 | |
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424 | left = "\"" if local else "<" |
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425 | right = "\"" if local else ">" |
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426 | self.add([ |
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427 | f"#include {left}{inc}{right}" |
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428 | for inc in sorted(set(includes), key=IncludeKey) |
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429 | ]) |
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430 | |
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431 | def wrap(self, content: Optional[str], intro: str = "") -> List[str]: |
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432 | """ Wraps a text. """ |
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433 | if not content: |
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434 | return [""] |
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435 | wrapper = textwrap.TextWrapper() |
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436 | wrapper.drop_whitespace = True |
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437 | wrapper.initial_indent = intro |
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438 | wrapper.subsequent_indent = len(intro) * " " |
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439 | wrapper.width = 79 - len(self._indent) |
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440 | return wrapper.wrap(content) |
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441 | |
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442 | def _open_comment_block(self, begin) -> None: |
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443 | self.add(begin) |
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444 | self.push_indent(" * ", " *") |
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445 | self.gap = False |
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446 | |
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447 | def open_comment_block(self) -> None: |
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448 | """ Opens a comment block. """ |
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449 | self._open_comment_block("/*") |
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450 | |
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451 | def open_doxygen_block(self) -> None: |
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452 | """ Opens a Doxygen comment block. """ |
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453 | self._open_comment_block("/**") |
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454 | |
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455 | def open_file_block(self) -> None: |
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456 | """ Opens a Doxygen @file comment block. """ |
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457 | self._open_comment_block(["/**", " * @file"]) |
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458 | self.gap = True |
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459 | |
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460 | def open_defgroup_block(self, identifier: str, name: str) -> None: |
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461 | """ Opens a Doxygen @defgroup comment block. """ |
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462 | self._open_comment_block(["/**", f" * @defgroup {identifier} {name}"]) |
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463 | self.gap = True |
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464 | |
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465 | def open_function_block(self, function: str) -> None: |
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466 | """ Opens a Doxygen @fn comment block. """ |
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467 | self._open_comment_block(["/**", f" * @fn {function}"]) |
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468 | self.gap = True |
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469 | |
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470 | def close_comment_block(self) -> None: |
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471 | """ Closes a comment block. """ |
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472 | self.pop_indent() |
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473 | self.append(" */") |
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474 | self.gap = True |
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475 | |
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476 | @contextmanager |
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477 | def comment_block(self) -> Iterator[None]: |
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478 | """ Opens a comment block context. """ |
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479 | self.open_comment_block() |
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480 | yield |
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481 | self.close_comment_block() |
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482 | |
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483 | @contextmanager |
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484 | def doxygen_block(self) -> Iterator[None]: |
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485 | """ Opens a Doxygen comment block context. """ |
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486 | self.open_doxygen_block() |
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487 | yield |
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488 | self.close_comment_block() |
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489 | |
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490 | @contextmanager |
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491 | def file_block(self) -> Iterator[None]: |
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492 | """ Opens a Doxygen @file comment block context. """ |
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493 | self.open_file_block() |
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494 | yield |
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495 | self.close_comment_block() |
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496 | |
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497 | @contextmanager |
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498 | def defgroup_block(self, identifier: str, name: str) -> Iterator[None]: |
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499 | """ Opens a Doxygen @defgroup comment block context. """ |
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500 | self.open_defgroup_block(identifier, name) |
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501 | yield |
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502 | self.close_comment_block() |
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503 | |
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504 | @contextmanager |
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505 | def function_block(self, function: str) -> Iterator[None]: |
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506 | """ Opens a Doxygen @fn comment block context. """ |
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507 | self.open_function_block(function) |
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508 | yield |
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509 | self.close_comment_block() |
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510 | |
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511 | def add_brief_description(self, description: Optional[str]) -> None: |
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512 | """ Adds a brief description. """ |
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513 | return self.add(self.wrap(description, intro="@brief ")) |
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514 | |
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515 | def add_ingroup(self, ingroups: List[str]) -> None: |
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516 | """ Adds an ingroup comment block. """ |
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517 | self.add(["@ingroup " + ingroup for ingroup in sorted(set(ingroups))]) |
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518 | |
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519 | def add_group(self, identifier: str, name: str, ingroups: List[str], |
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520 | brief: Optional[str], description: Optional[str]) -> None: |
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521 | # pylint: disable=too-many-arguments |
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522 | """ Adds a group definition. """ |
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523 | with self.defgroup_block(identifier, name): |
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524 | self.add_ingroup(ingroups) |
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525 | self.add_brief_description(brief) |
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526 | self.add(self.wrap(description)) |
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527 | |
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528 | @contextmanager |
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529 | def header_guard(self, filename: str) -> Iterator[None]: |
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530 | """ Opens a header guard context. """ |
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531 | filename = os.path.basename(filename) |
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532 | guard = "_" + filename.replace(".", "_").upper() |
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533 | self.add([f"#ifndef {guard}", f"#define {guard}"]) |
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534 | yield |
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535 | self.add(f"#endif /* {guard} */") |
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536 | |
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537 | @contextmanager |
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538 | def extern_c(self) -> Iterator[None]: |
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539 | """ Opens an extern "C" context. """ |
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540 | self.add(["#ifdef __cplusplus", "extern \"C\" {", "#endif"]) |
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541 | yield |
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542 | self.add(["#ifdef __cplusplus", "}", "#endif"]) |
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