#include <stdint.h>

#include "class_resolver.h"

struct objectref {
  struct class_entry * class_entry;
  union {
    void * field[0];
  };
};

static_assert((sizeof (struct objectref)) == 4);

struct primitive_arrayref {
  int32_t length;
  union {
    uint8_t u8[0];
    uint16_t u16[0];
    uint32_t u32[0];
    uint64_t u64[0];
  };
};

static_assert((sizeof (struct primitive_arrayref)) == 4);

struct object_arrayref {
  struct class_entry * class_entry;
  int32_t length;
  union {
    struct objectref * a[0];
    uint32_t u32[0];
  };
};

static_assert((sizeof (struct object_arrayref)) == 8);

enum ARRAY_TYPE {
  T_BOOLEAN = 4, // 1 byte
  T_CHAR = 5,    // 2 bytes
  T_FLOAT = 6,   // 4 bytes
  T_DOUBLE = 7,  // 8 bytes
  T_BYTE = 8,    // 1 byte
  T_SHORT = 9,   // 2 bytes
  T_INT = 10,    // 4 bytes
  T_LONG = 11,   // 8 bytes
};

static inline int array_element_size(int atype)
{
  switch (atype) {
  case T_BOOLEAN: [[fallthrough]]; // 1 byte
  case T_BYTE:                     // 1 byte
    return 1;
    break;
  case T_CHAR:    [[fallthrough]]; // 2 bytes
  case T_SHORT:                    // 2 bytes
    return 2;
    break;
  case T_FLOAT:   [[fallthrough]]; // 4 bytes
  case T_INT:                      // 4 bytes
    return 4;
    break;
  case T_DOUBLE:  [[fallthrough]]; // 8 bytes
  case T_LONG:                     // 8 bytes
    return 8;
    break;
  default:
    assert(!"invalid atype");
    break;
  }
}