#pragma once

/* FIXME(sigrid): s*_overflow_* can be more optimal */
#define sadd_overflow_64(a, b, c) ( \
  (b < 1) ? \
  ((INT64_MAX-(b) <= (a)) ? ((*(c)=(a)+(b)), 0) : 1) : \
  ((INT64_MAX-(b) >= (a)) ? ((*(c)=(a)+(b)), 0) : 1) \
)
#define smul_overflow_64(a, b, c) ( \
        ((a)>0 ? ((b)>0 ? (a)>INT64_MAX/(b) : (b)<INT64_MIN/(a)) \
               : ((b)>0 ? (a)<INT64_MIN/(b) : ((a)!=0 && (b)<INT64_MAX/(a)))) \
        ? 1 \
        : ((*(c)=(a)*(b)), 0) \
)
#if defined(BITS64)
#define sadd_overflow(a, b, c) sadd_overflow_64(a, b, c)
#else
#define sadd_overflow(a, b, c) ( \
  (b < 1) ? \
  ((INT32_MAX-(b) <= (a)) ? ((*(c)=(a)+(b)), 0) : 1) : \
  ((INT32_MAX-(b) >= (a)) ? ((*(c)=(a)+(b)), 0) : 1) \
)
#endif