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contributing: add safety section

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Simon Ser 2023-10-02 16:21:10 +02:00
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CONTRIBUTING.md
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@ -237,6 +237,15 @@ used and `#undef` them after.
* Document the contents and container of a `struct wl_list` with a
`// content.link` and `// container.list` comment.
### Safety
* Avoid string manipulation functions which don't take the size of the
destination buffer as input: for instance, prefer `snprintf` over `sprintf`.
* Avoid repeating type names in `sizeof()` where possible. For instance, prefer
`ptr = calloc(1, sizeof(*ptr))` over `ptr = calloc(1, sizeof(struct foo))`.
* Prefer `*ptr = (struct foo){0}` over `memset(ptr, 0, sizeof(*ptr))`.
* Prefer `*foo = *bar` over `memcpy(foo, bar, sizeof(*foo))`.
### Example
```c