Help with CFFI, C struct decoding, best practices / portability

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roaring-bitmaps Visual Studio C Clang Gcc

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  • CRoaring

    Roaring bitmaps in C (and C++), with SIMD (AVX2, AVX-512 and NEON) optimizations: used by Apache Doris, ClickHouse, and StarRocks

    • I've been using CFFI to access the CRoaring C API to Roaring Bitmaps. It's been pretty easy so far. However I'm not experienced in lisp FFI, and I'm unsure of the way to go about the task of decoding a C structure used for iteration in the C CPI. The structure is as follows: ``` typedef struct roaring_uint32_iterator_s { const roaring_bitmap_t *parent; // owner int32_t container_index; // point to the current container index int32_t in_container_index; // for bitset and array container, this is out // index int32_t run_index; // for run container, this points at the run

  • WorkOS

    The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

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