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Add .clang-format style file
Went with version >= 11.0 since it covers most of the major features
and should be pretty universally accessibly.
There are some issues:
1. indention of preprocessor directives:
Unfortunately there doesn't appear to be a switch for a seperate
'IndentWidth' for preprocessor directives vs. normal code so we
are stuck either not indenting the directives or over-indenting
them. i.e:
Desired:
```
#ifndef A
# define B
#endif
```
Options:
```
#ifndef A
# define B /* Two spaces instead of one. */
#endif
#ifndef C
#define D /* No spaces. */
#endif
```
Chose to over-indent as it generally seems easier to script
halving all pre-processor indentations than counting the nested
depth and indenting from scratch.
2. concatenation of lines missing semi-colons:
Throughout glibc there are macros used to setup aliasing that are
outside of functions and don't end in semi-colons i.e:
```
libc_hidden_def (__pthread_self)
weak_alias (__pthread_self, pthread_self)
```
clang-format reformats lines like these to:
```
libc_hidden_def (__pthread_self) weak_alias (__pthread_self, pthread_self)
```
which is generally undesirable.
Other than those two big concerns there are certainly some questions
diffs but for the most part it creates a easy to read and consistent
style.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Noah Goldstein
parent
d2265570a7
commit
ac5f5a92ed
156
.clang-format
Normal file
156
.clang-format
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@ -0,0 +1,156 @@
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# clang-format file for GLIBC
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# Copyright (C) 2022 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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#
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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#
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# Requires clang-format version >= 11.0
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#
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# For more information, see:
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#
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# https://clang.llvm.org/docs/ClangFormat.html
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# https://clang.llvm.org/docs/ClangFormatStyleOptions.html
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#
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# There are some known cases that this doesn't produce the desired
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# style (i.e Preprocessor Directives are over-indented and not
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# auto-commented). As a result, this is meant to be a utility to make
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# formatting easier, not a definitive standard.
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#
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# To format the current git diff inplace (-i) the follow command can
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# be used:
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# $> git diff -U0 --no-color HEAD^ | clang-format-diff -i -p1
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#
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# To just view the diff clang-format would generate:
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# $> git diff -U0 --no-color HEAD^ | clang-format-diff -p1
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#
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# NB: clang-format-diff, along with other clang-format related tools,
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# can be found at: /path/to/llvm-project/clang/tools/clang-format/
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#
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#
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# Based on autogenerated format from:
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# $> clang-format --style=GNU -dump-config
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---
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AccessModifierOffset: -2
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AlignAfterOpenBracket: Align
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AlignConsecutiveMacros: false
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AlignConsecutiveAssignments: false
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AlignConsecutiveBitFields: false
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AlignConsecutiveDeclarations: false
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AlignEscapedNewlines: Right
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AlignOperands: true
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AlignTrailingComments: true
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AllowAllArgumentsOnNextLine: true
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AllowAllParametersOfDeclarationOnNextLine: true
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AllowShortEnumsOnASingleLine: true
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AllowShortBlocksOnASingleLine: false
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AllowShortCaseLabelsOnASingleLine: false
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AllowShortFunctionsOnASingleLine: All
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AllowShortLambdasOnASingleLine: All
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AllowShortIfStatementsOnASingleLine: Never
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AllowShortLoopsOnASingleLine: false
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AlwaysBreakAfterDefinitionReturnType: All
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AlwaysBreakAfterReturnType: AllDefinitions
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AlwaysBreakBeforeMultilineStrings: false
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BinPackArguments: true
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BinPackParameters: true
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BraceWrapping:
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AfterCaseLabel: true
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AfterClass: true
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AfterControlStatement: true
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AfterEnum: true
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AfterFunction: true
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AfterNamespace: true
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AfterStruct: true
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AfterUnion: true
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AfterExternBlock: true
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BeforeCatch: true
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BeforeElse: true
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BeforeWhile: true
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IndentBraces: true
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SplitEmptyFunction: true
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SplitEmptyRecord: true
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SplitEmptyNamespace: true
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BreakBeforeBinaryOperators: All
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BreakBeforeBraces: GNU
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BreakBeforeInheritanceComma: false
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BreakInheritanceList: BeforeColon
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BreakBeforeTernaryOperators: true
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BreakStringLiterals: true
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ColumnLimit: 79
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CommentPragmas: '^ IWYU pragma:'
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CompactNamespaces: false
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ContinuationIndentWidth: 4
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Cpp11BracedListStyle: false
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DeriveLineEnding: true
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DerivePointerAlignment: false
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DisableFormat: false
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ExperimentalAutoDetectBinPacking: false
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FixNamespaceComments: false
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IncludeBlocks: Preserve
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IncludeCategories:
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- Regex: '.*'
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Priority: 1
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IncludeIsMainRegex: '(Test)?$'
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IndentCaseLabels: false
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IndentCaseBlocks: false
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IndentGotoLabels: true
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IndentWidth: 2
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IndentPPDirectives: AfterHash
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IndentExternBlock: AfterExternBlock
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IndentWrappedFunctionNames: false
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InsertTrailingCommas: None
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KeepEmptyLinesAtTheStartOfBlocks: true
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MacroBlockBegin: ''
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MacroBlockEnd: ''
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MaxEmptyLinesToKeep: 1
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NamespaceIndentation: None
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PenaltyBreakAssignment: 2
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PenaltyBreakBeforeFirstCallParameter: 19
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PenaltyBreakComment: 300
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PenaltyBreakFirstLessLess: 120
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PenaltyBreakString: 1000
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PenaltyExcessCharacter: 1000000
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PenaltyReturnTypeOnItsOwnLine: 60
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PointerAlignment: Right
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ReflowComments: true
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SortIncludes: false
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SortUsingDeclarations: true
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SpaceAfterCStyleCast: true
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SpaceAfterLogicalNot: false
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SpaceBeforeAssignmentOperators: true
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SpaceBeforeCpp11BracedList: false
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SpaceBeforeCtorInitializerColon: true
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SpaceBeforeInheritanceColon: true
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SpaceBeforeParens: Always
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SpaceBeforeRangeBasedForLoopColon: true
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SpaceInEmptyBlock: false
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SpaceInEmptyParentheses: false
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SpacesBeforeTrailingComments: 1
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SpacesInAngles: false
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SpacesInConditionalStatement: false
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SpacesInContainerLiterals: true
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SpacesInCStyleCastParentheses: false
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SpacesInParentheses: false
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SpacesInSquareBrackets: false
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SpaceBeforeSquareBrackets: false
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Standard: Cpp03
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TabWidth: 8
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UseTab: Always
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ForEachMacros:
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- 'FOR_EACH_IMPL'
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- 'list_for_each'
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- 'list_for_each_prev'
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- 'list_for_each_prev_safe'
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...
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