// https://github.com/keith/objc_dupclass
#include <stdint.h>

// TODO: This isn't entirely accurate, but I'm not sure how to more accurately determine
#if (defined(__arm64__) || defined(DUPCLASS_FORCE_DATA_CONST)) && !defined(DUPCLASS_FORCE_DATA)
#define SECTION "__DATA_CONST"
#else
#define SECTION "__DATA"
#endif

// Struct layout from https://github.com/apple-oss-distributions/objc4/blob/8701d5672d3fd3cd817aeb84db1077aafe1a1604/runtime/objc-abi.h#L175-L183
#define OBJC_DUPCLASS(kclass) \
    __attribute__((used)) __attribute__((visibility("hidden"))) \
      static struct { uint32_t version; uint32_t flags; const char name[128]; } \
      const __duplicate_class_##kclass = { 0, 0, #kclass }; \
    \
    __attribute__((used)) __attribute__((visibility("hidden"))) \
      __attribute__((section (SECTION",__objc_dupclass"))) \
      const void* __set___objc_dupclass_sym___duplicate_class_##kclass = &__duplicate_class_##kclass