Patches to Bf Blender for CAD development.
https://tornavis.org/
793446cbdc
Covers the macro ARRAY_SIZE() and STRNCPY. The problem this change is aimed to solve it to provide cross-platform compiler-independent safe way pf ensuring that the functions are used correctly. The type safety was only ensured for GCC and only for C. The C++ language and Clang compiler would not have detected issues of passing bare pointer to neither of those macros. Now the STRNCPY() will only accept a bounded array as the destination argument, on any compiler. The ARRAY_SIZE as well, but there are a bit more complications to it in terms of transparency of the change. In one place the ARRAY_SIZE was used on float3 type. This worked in the old code because the type implements subscript operator, and the type consists of 3 floats. One would argue this is somewhat hidden/implicit behavior, which better be avoided. So an in-lined value of 3 is used now there. Another place is the ARRAY_SIZE used to define a bounded array of the size which matches bounded array which is a member of a struct. While the ARRAY_SIZE provides proper size in this case, the compiler does not believe that the value is known at compile time and errors out with a message that construction of variable-size arrays is not supported. Solved by converting the field to std::array<> and adding dedicated utility to get size of std::array at compile time. There might be a better way of achieving the same result, or maybe the approach is fine and just need to find a better place for such utility. Surely, more macro from the BLI_string.h can be covered with the C++ inlined functions, but need to start somewhere. There are also quite some changes to ensure the C linkage is not enforced by code which includes the headers. Pull Request: https://projects.blender.org/blender/blender/pulls/108041 |
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