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Q&A

Welcome to Software Development on Codidact!

Will you help us build our independent community of developers helping developers? We're small and trying to grow. We welcome questions about all aspects of software development, from design to code to QA and more. Got questions? Got answers? Got code you'd like someone to review? Please join us.

Posts tagged strict-aliasing

For questions about C's strict aliasing. an assumption made by the C or C++ compiler, that de-referencing pointers to objects of different types will never refer to the same memory location.

This tag doesn't have a detailed wiki yet.

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Q&A Storing more bytes than a union member has, but less than the union size, with memcpy(3)

Let's say we have an object, we store it in a union (into some other narrower type, but with memcpy(3), so it's allowed --I guess--), and then read it from the union via it's original type (so no a...

2 answers  ·  posted 11mo ago by alx‭  ·  last activity 10mo ago by Lundin‭

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Q&A Strict aliasing rules and function boundaries

Let's analyze this code, assuming an architecture where the alignment of int64_t is the same as that of double: void bar(double *f, int64_t *j) { *(int64_t *)f = *j; } void foo(void) ...

1 answer  ·  posted 1y ago by alx‭  ·  edited 1y ago by Lundin‭

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Q&A Is `uint8_t` always an alias for a character type if it exists?

Is uint8_t guaranteed to be a character type if it exists? Will using a uint8_t* to examine bytes of an object cause violation of the strict aliasing rule? Is the following legal code: #include &l...

1 answer  ·  posted 3y ago by Ayxan Haqverdili‭  ·  edited 3y ago by Lundin‭