Pointers are segments: size C pointers before a read, SQLITE_TRANSIEN… - #2
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…T as a segment babashka.ffi now hands out a MemorySegment with a size instead of a long. A pointer from C has size 0 and needs reinterpret before a read: blobs, argv in a callback and the aggregate slot. Blobs copy with read-bytes and write-bytes instead of a byte loop. SQLITE_TRANSIENT is the pseudo pointer (void*)-1, written as a segment now that a number is not a pointer.
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…T as a segment
babashka.ffi now hands out a MemorySegment with a size instead of a long. A pointer from C has size 0 and needs reinterpret before a read: blobs, argv in a callback and the aggregate slot. Blobs copy with read-bytes and write-bytes instead of a byte loop. SQLITE_TRANSIENT is the pseudo pointer (void*)-1, written as a segment now that a number is not a pointer.