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Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
81 lines
3.5 KiB
Markdown
81 lines
3.5 KiB
Markdown
Coding guidelines for s390-tools
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================================
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For s390-tools the preferred language is C. We provide libraries, e.g.
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[`libutil`](libutil) that should be used by all tools if possible.
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The coding style is based on the Linux [kernel guidelines]. Therefore, use
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the [checkpatch] tool for verification before you submit a patch.
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[kernel guidelines]: https://www.kernel.org/doc/html/latest/process/coding-style.html
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[checkpatch]: https://github.com/torvalds/linux/blob/master/scripts/checkpatch.pl
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Below we describe some additional things that we want you to consider when
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writing new code for s390-tools.
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This package started in 2001 and has a long "tradition" - therefore, older tools
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might not follow all recommendations. Note that when changing existing code,
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consistency could have priority over applying rules.
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Automatic Code Formatting
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-------------------------
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> **NOTE:** clang-format is a helpful tool but please don't use it blindly!
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s390-tools provides a ClangFormat (https://clang.llvm.org/docs/ClangFormat.html)
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configuration file - see [`.clang-format`](.clang-format). It can be used to
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format your C/C++ code automatically.
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Clang-format can format a single file or multiple files at once. For example, to
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format `main.c` in place, run the following command in a terminal:
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```bash
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clang-format -i main.c
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```
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In order to format only your current staged changes use the clang-format git
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plugin:
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```bash
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git clang-format --staged
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```
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See also `git clang-format -h`.
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Automatic Editor Configuration
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------------------------------
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s390-tools provides a EditorConfig (https://editorconfig.org/) configuration
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file - see [`.editorconfig`](.editorconfig). EditorConfig defines coding style
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rules (such as indentation size, use of tabs, etc.) and is supported by most
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common editors natively or via plugins.
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Standard abbreviations
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----------------------
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The abbreviations below are recommended to be used in the source code.
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| __Short Name__ | __Long Name__ |
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|:----------------|:--------------------------------------------------|
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| attr | Attribute |
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| blk | Block |
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| buf | Buffer |
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| col | Column |
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| count | Count |
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| desc | Description |
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| dir | Directory |
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| fd | File descriptor (open) |
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| fp | File pointer (fopen) |
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| len | Length |
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| lib | Library |
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| mod | Module |
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| nr | Number |
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| parm | Parameter |
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| path | File path |
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| ptr | Pointer |
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| rc | Return code |
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| size | Size |
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| src | Source |
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| str | String |
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| sym | Symbol |
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