text: #ifndef SIMDJSON_COMMON_DEFS_H
  #define SIMDJSON_COMMON_DEFS_H
  
  #include "simdjson/portability.h"
  
  #include <cassert>
  
  // the input buf should be readable up to buf + SIMDJSON_PADDING
  #define SIMDJSON_PADDING  sizeof(__m256i)
  
  #ifndef _MSC_VER
  // Implemented using Labels as Values which works in GCC and CLANG (and maybe
  // also in Intel's compiler), but won't work in MSVC.
  #define SIMDJSON_USE_COMPUTED_GOTO
  #endif
  
  
  
  
  // Align to N-byte boundary
  #define ROUNDUP_N(a, n) (((a) + ((n)-1)) & ~((n)-1))
  #define ROUNDDOWN_N(a, n) ((a) & ~((n)-1))
  
  #define ISALIGNED_N(ptr, n) (((uintptr_t)(ptr) & ((n)-1)) == 0)
  
  #ifdef _MSC_VER
  
  
  #define really_inline inline
  #define never_inline inline
  
  #define UNUSED
  #define WARN_UNUSED
  
  #ifndef likely
  #define likely(x) x
  #endif
  #ifndef unlikely
  #define unlikely(x) x
  #endif
  
  #else
  
  #define really_inline inline __attribute__((always_inline, unused))
  #define never_inline inline __attribute__((noinline, unused))
  
  #define UNUSED __attribute__((unused))
  #define WARN_UNUSED __attribute__((warn_unused_result))
  
  #ifndef likely
  #define likely(x) __builtin_expect(!!(x), 1)
  #endif
  #ifndef unlikely
  #define unlikely(x) __builtin_expect(!!(x), 0)
  #endif
  
  #endif  // MSC_VER
  
  #endif // COMMON_DEFS_H
  